CN115046880B - Cable moisture degree detection method, device and equipment - Google Patents
Cable moisture degree detection method, device and equipment Download PDFInfo
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- CN115046880B CN115046880B CN202210293335.1A CN202210293335A CN115046880B CN 115046880 B CN115046880 B CN 115046880B CN 202210293335 A CN202210293335 A CN 202210293335A CN 115046880 B CN115046880 B CN 115046880B
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- 238000001514 detection method Methods 0.000 title claims abstract description 68
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 406
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 189
- 238000010438 heat treatment Methods 0.000 claims abstract description 134
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 238000009736 wetting Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000013016 damping Methods 0.000 claims abstract description 30
- 230000007613 environmental effect Effects 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- 239000000376 reactant Substances 0.000 claims description 37
- 239000000047 product Substances 0.000 claims description 26
- 238000005259 measurement Methods 0.000 claims description 25
- 238000003860 storage Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000001556 precipitation Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 28
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 8
- 238000007791 dehumidification Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003062 neural network model Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
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- General Health & Medical Sciences (AREA)
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- Examining Or Testing Airtightness (AREA)
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Abstract
The embodiment of the application discloses a method, a device and equipment for detecting the moisture degree of a cable. Acquiring environmental characteristic data of a cable placement area to be detected so as to determine a corresponding cable wetting degree reference value; based on the reference value of the cable wetting degree, the temperature of the nitrogen heating component in the cable wetting detection device is adjusted, and the on-off adjustment of the switch valve component in the cable wetting detection device is performed, so that the heating nitrogen with corresponding temperature and quality enters the sealing component in the cable wetting detection device; the method comprises the steps of obtaining first weight information sent by a moisture measuring assembly in a cable damping detection device, carrying out secondary adjustment on the cable damping detection device based on the first weight information, and obtaining second weight information after moisture in a cable to be detected is absorbed, so that the damping degree corresponding to the cable to be detected is determined according to the second weight information. By the method, the damage degree of the cable can be diagnosed in time.
Description
Technical Field
The application relates to the technical field of cable detection, in particular to a method, a device and equipment for detecting the moisture degree of a cable.
Background
The crosslinked polyethylene cable is widely applied to urban distribution networks due to the advantages of good insulating property, large current-carrying capacity, simple structure, convenient accessory installation and the like.
Because the cable itself is operated underground for a long period of time, the crosslinked polyethylene cable and the intermediate joint gradually become wet due to moisture intrusion as the operation time is prolonged. After being corroded by water, the cable has a series of physicochemical effects under the action of a strong electric field, so that the phenomenon of forming water branches along the electric field direction in insulation is more and more serious, and breakdown accidents of the cable insulation are caused.
In the prior art, a manual handheld flame gun is generally adopted to heat the outer sides of the cable terminal and the joint part so as to dry the moisture in the cable terminal, but concentrated heat transfer can cause damage to the cable, and the service life of the cable is reduced. In addition, the method for drying the cable by manually holding the flame gun is difficult to detect the wetting degree of the cable at the same time, so that the damage degree of the cable is difficult to diagnose in time.
Disclosure of Invention
The embodiment of the application provides a method, a device and equipment for detecting the moisture degree of a cable, which are used for solving the following technical problems: in the prior art, the method for drying the cable by the manual handheld flame gun not only can damage the cable, but also is difficult to detect the wetting degree of the cable, so that the damage degree of the cable is difficult to diagnose and treat in time.
The embodiment of the application adopts the following technical scheme:
The embodiment of the application provides a method for detecting the moisture degree of a cable. Acquiring environmental characteristic data of a cable placement area to be detected, and determining a corresponding cable wetting degree reference value according to the environmental characteristic data; the environment characteristic data at least comprises one or more of temperature data, precipitation data and external damage records corresponding to the cable placement area to be detected; based on the reference value of the cable wetting degree, the temperature of the nitrogen heating component in the cable wetting detection device is regulated, and the on-off regulation of the switch valve component in the cable wetting detection device is carried out, so that the heating nitrogen with corresponding temperature and mass enters the sealing component in the cable wetting detection device, and the water in the cable to be detected placed in the sealing component is evaporated and conveyed to the water measuring component; acquiring first weight information sent by a moisture measuring component in the cable wetting detection device, and performing secondary adjustment on the cable wetting detection device based on the first weight information; wherein the first weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing part of the moisture is related to the weight of the remaining reactants; after the moisture in the cable to be detected is absorbed, obtaining second weight information, and determining the corresponding moisture degree of the cable to be detected according to the second weight information; wherein the second weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing all the moisture is related to the weight of the remaining reactants.
According to the embodiment of the application, the corresponding cable damping degree reference value is obtained by acquiring the environmental characteristic data of the area where the cable to be detected is placed, the cable damping detection device can be regulated by the reference value, and the corresponding nitrogen temperature and quantity are determined, so that the nitrogen is heated in a planned manner at the corresponding temperature, the cable damping degree detection is completed, and resources are saved. Secondly, the embodiment of the application can adjust the heating temperature of the nitrogen based on the current moisture degree of the cable by secondarily adjusting the cable moisture detection device through the acquired first weight information, so that the heating temperature of the nitrogen can finish the dehumidification operation requirement of the cable at a lower temperature. In addition, the cable is dehumidified by heating nitrogen, so that heat is not intensively transferred, and damage to the cable can be reduced. The embodiment of the application is provided with the moisture measuring assembly, and the moisture content in the cable can be obtained through the moisture measuring device, so that the moisture degree of the cable is detected, whether the cable fails or not is further determined according to the moisture degree of the cable, the cable is replaced in time, and the stable operation of a power grid is ensured.
In one implementation of the present application, based on the reference value of the cable wetting degree, the temperature adjustment of the nitrogen heating component in the cable wetting detection device and the adjustment of the switch valve component in the cable wetting detection device specifically include: determining a nitrogen heating reference temperature corresponding to the cable moisture degree reference value in a preset database, so as to regulate the temperature of the nitrogen heating assembly according to the nitrogen heating reference temperature; under the condition that the temperature of the nitrogen heating assembly reaches the nitrogen heating reference temperature, controlling the nitrogen heating assembly to stop heating, opening a first switch valve and a second switch valve, enabling heated nitrogen to enter the sealing assembly through the first switch valve, and enabling nitrogen with water vapor to enter the moisture measuring assembly through the second switch valve; the switch valve assembly comprises a first switch valve, a second switch valve, a third switch valve and a fourth switch valve; the first switch valve is arranged between the nitrogen heating component and the sealing component, and the second switch valve is arranged between the sealing component and the moisture measuring component; the third switch valve is arranged at the exhaust pipe of the moisture measuring assembly, and the fourth switch valve is arranged between the nitrogen storage assembly and the nitrogen heating assembly.
According to the embodiment of the application, the temperature of the nitrogen heating assembly is adjusted according to the nitrogen heating reference temperature, so that the nitrogen can be heated at a lower temperature, and the problem of resource waste in the nitrogen heating process is solved. Secondly, through letting in seal assembly with the nitrogen gas after the heating, evaporate through the inside moisture of cable in seal assembly, on the one hand can avoid moisture in the external environment to lead to the fact the influence to the testing result, on the other hand, through the mode of heating nitrogen gas with the moisture conversion in the cable for vapor, can avoid causing the damage to the cable to the life of extension cable.
In one implementation of the present application, the method for acquiring initial weight information sent by a moisture measurement component in a cable moisture detection device specifically includes: acquiring an initial weight value sent by a weighing sensor arranged on a moisture measuring assembly; wherein the first weight value includes at least a weight of the moisture measurement assembly and a weight of a reactant disposed within the moisture measurement assembly; after the second switch valve is opened, acquiring first weight information sent by the weighing sensor in real time; the first weight information at least comprises the weight of the moisture measuring assembly, the weight of corresponding reactants, products and nitrogen in the moisture measuring assembly; the product is generated after the reactant reacts with the water vapor in the cable to be detected.
In one implementation of the present application, the second adjustment of the cable moisture detection device based on the first weight information specifically includes: based on the first weight information, determining weight increase data obtained after the water vapor in the moisture measurement assembly is absorbed by the reactant; wherein the weight increase data is weight change data measured by a time-varying weighing sensor; based on the weight increase data, performing secondary adjustment on the temperature of a nitrogen heating component of the cable damp detection device and/or the size of a ventilation channel corresponding to a switch valve component in the cable damp detection device; wherein the switch valve assembly further comprises a third switch valve and a fourth switch valve; the third switch valve is arranged at the exhaust pipe of the moisture measuring assembly, and the fourth switch valve is arranged between the nitrogen storage assembly and the nitrogen heating assembly.
According to the embodiment of the application, the weight increase data of the moisture measuring assembly is obtained through the first weight information. And the current weight increasing speed is determined according to the weight increasing quantity, and the nitrogen heating assembly is adjusted differently according to the increasing speed. Therefore, the drying process of the cable to be detected is completed at a lower temperature, and the problem of resource waste in the nitrogen heating process is solved.
In one implementation of the present application, based on the weight increase data, the temperature of the nitrogen heating component of the cable moisture detection device and/or the size of the ventilation channel corresponding to the switch valve component in the cable moisture detection device are secondarily adjusted, which specifically includes: after the first preset reaction time is reached, under the condition that the weight increase data are at a constant speed or are accelerated to increase, the heating temperature of the nitrogen heating assembly is increased, and the ventilation channel of the first switch valve is enlarged; reducing the heating temperature of the nitrogen heating assembly and reducing the vent passage of the first switch valve with the rate of increase of the weight increase data at a decrease; and closing all the switch valves in the nitrogen heating assembly and the switch valve assembly under the condition that the increasing speed of the weight increasing data is zero.
In one implementation manner of the present application, after the moisture in the cable to be detected is absorbed, second weight information is obtained, which specifically includes: if the weight value sent by the weighing sensor does not change within the second preset reaction time period, determining that the water in the cable to be detected is completely absorbed; acquiring second weight information sent by a weighing sensor; the second weight information at least comprises the weight of the moisture measuring assembly and the total weight of the corresponding products and the residual reactants in the moisture measuring assembly after nitrogen is removed; performing difference calculation on the weight value corresponding to the second weight information and the initial weight value to obtain the water-containing weight of the cable to be detected; comparing the water content weight of the cable to be detected with preset data to determine the moisture degree of the cable to be detected; the preset data comprise different water contents corresponding to the cable and corresponding damp degree grades respectively corresponding to the different water contents.
In one implementation manner of the application, environmental characteristic data of a cable placement area to be detected is obtained, so as to determine a corresponding cable wetting degree reference value according to the environmental characteristic data, and the method specifically comprises the following steps: acquiring temperature data, precipitation data corresponding to a cable placement area to be detected and external damage records of the cable placement area to be detected within a preset time period; the external damage record of the cable placement area to be detected at least comprises the time of the cable being damaged by external force, equipment information for carrying out cable damage and rolling information of the cable placement area to be detected by a vehicle; based on the time sequence of recording different data, the temperature data, the precipitation data and the external damage records of the cable placement area to be detected are sequentially input into a preset cable damping degree prediction model, so that a cable damping degree reference value is obtained according to the preset cable damping degree prediction model.
In one implementation manner of the present application, after determining the corresponding moisture degree of the cable to be detected according to the second weight information, the method further includes: sending an opening command to a third switch valve arranged on the moisture measurement assembly so that nitrogen in the moisture measurement assembly is re-conveyed to the nitrogen storage assembly through the third switch valve; and sending a start command to a heating assembly installed in the moisture measuring assembly to heat the product in the moisture measuring assembly by the heating assembly to perform a pollution removal process on the product.
The embodiment of the application provides a cable damp detection device, which comprises a nitrogen storage component, a nitrogen heating component, a sealing component and a moisture measurement component; the opening of the nitrogen storage component is connected with the nitrogen heating component through a fourth switch valve; the other end of the nitrogen heating component is connected with the sealing component through a first connector, and a first switch valve is arranged on the connector; after the nitrogen heating component heats the nitrogen, the first switch valve is opened so that the heated nitrogen enters the sealing component through the first connector; the other end of the sealing component is connected with the moisture measuring component through a second communicating vessel, and a second switch valve is arranged on the second communicating vessel; the cable to be detected is placed in the sealing assembly, moisture in the cable to be detected is evaporated in the sealing assembly through heating nitrogen, and the obtained water vapor is conveyed to the moisture measuring assembly through heating nitrogen under the condition that the second switch valve is opened; the moisture measuring component comprises a reaction cavity and a weight sensor; the reaction chamber is internally provided with a reactant, the reactant is used for drying the water-containing nitrogen entering the reaction chamber, and the weight sensor is used for monitoring the weight of the reaction chamber in real time and uploading the monitored weight to the server in real time.
The embodiment of the application provides a cable damping detection device, which comprises: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to: acquiring environmental characteristic data of a cable placement area to be detected, and determining a corresponding cable wetting degree reference value according to the environmental characteristic data; the environment characteristic data at least comprises one or more of temperature data, precipitation data and external damage records corresponding to the cable placement area to be detected; based on the reference value of the cable wetting degree, the temperature of the nitrogen heating component in the cable wetting detection device is regulated, and the on-off regulation of the switch valve component in the cable wetting detection device is carried out, so that the heating nitrogen with corresponding temperature and mass enters the sealing component in the cable wetting detection device, and the water in the cable to be detected placed in the sealing component is evaporated and conveyed to the water measuring component; acquiring first weight information sent by a moisture measuring component in the cable wetting detection device, and performing secondary adjustment on the cable wetting detection device based on the first weight information; wherein the first weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing part of the moisture is related to the weight of the remaining reactants; after the moisture in the cable to be detected is absorbed, obtaining second weight information, and determining the corresponding moisture degree of the cable to be detected according to the second weight information; wherein the second weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing all the moisture is related to the weight of the remaining reactants.
The above at least one technical scheme adopted by the embodiment of the application can achieve the following beneficial effects: according to the embodiment of the application, the corresponding cable damping degree reference value is obtained by acquiring the environmental characteristic data of the area where the cable to be detected is placed, the cable damping detection device can be regulated by the reference value, and the corresponding nitrogen temperature and quantity are determined, so that the nitrogen is heated in a planned manner at the corresponding temperature, the cable damping degree detection is completed, and resources are saved. Secondly, the embodiment of the application can adjust the heating temperature of the nitrogen based on the current moisture degree of the cable by secondarily adjusting the cable moisture detection device through the acquired first weight information, so that the heating temperature of the nitrogen can finish the dehumidification operation requirement of the cable at a lower temperature. In addition, the cable is dehumidified by heating nitrogen, so that heat is not intensively transferred, and damage to the cable can be reduced. The embodiment of the application is provided with the moisture measuring assembly, and the moisture content in the cable can be used for detecting the moisture degree of the cable through the moisture measuring device, so that whether the cable fails or not is determined according to the moisture degree of the cable, the cable is replaced in time, and the stable operation of a power grid is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic diagram of a cable moisture detection device according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for detecting the moisture content of a cable according to an embodiment of the present application;
Fig. 3 is a schematic structural diagram of a cable moisture-affected degree detection device according to an embodiment of the present application.
Wherein,
1 Nitrogen storage component, 2 nitrogen heating component, 3 sealing component, 4 moisture measurement component, 5 first ooff valve, 6 second ooff valve, 7 third ooff valve, 8 fourth ooff valve, 9 first intercommunication ware, 10 second intercommunication ware.
Detailed Description
The embodiment of the application provides a method, a device and equipment for detecting the moisture degree of a cable.
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
Because the cable itself is operated underground for a long period of time, the crosslinked polyethylene cable and the intermediate joint gradually become wet due to moisture intrusion as the operation time is prolonged. After being corroded by water, the cable has a series of physicochemical effects under the action of a strong electric field, so that the phenomenon of forming water branches along the electric field direction in insulation is more and more serious, and breakdown accidents of the cable insulation are caused.
In the prior art, a manual handheld flame gun is generally adopted to heat the outer sides of the cable terminal and the joint part so as to dry the moisture in the cable terminal, but concentrated heat transfer can cause damage to the cable, and the service life of the cable is reduced. In addition, the method for drying the cable by manually holding the flame gun is difficult to detect the wetting degree of the cable at the same time, so that the damage degree of the cable is difficult to diagnose in time.
According to the embodiment of the application, the corresponding cable damping degree reference value is obtained by acquiring the environmental characteristic data of the area where the cable to be detected is placed, the cable damping detection device can be regulated by the reference value, and the corresponding nitrogen temperature and quantity are determined, so that the nitrogen is heated in a planned manner at the corresponding temperature, the cable damping degree detection is completed, and resources are saved. Secondly, the embodiment of the application can adjust the heating temperature of the nitrogen based on the current moisture degree of the cable by secondarily adjusting the cable moisture detection device through the acquired first weight information, so that the heating temperature of the nitrogen can finish the dehumidification operation requirement of the cable at a lower temperature. In addition, the cable is dehumidified by heating nitrogen, so that heat is not intensively transferred, and damage to the cable can be reduced. The embodiment of the application is provided with the moisture measuring assembly, and the moisture content in the cable can be used for detecting the moisture degree of the cable through the moisture measuring device, so that whether the cable fails or not is determined according to the moisture degree of the cable, the cable is replaced in time, and the stable operation of a power grid is ensured.
The following describes the technical scheme provided by the embodiment of the application in detail through the attached drawings.
Fig. 1 is a schematic diagram of a cable moisture-sensing device according to an embodiment of the present application. As shown in fig. 1, the cable moisture detection device includes a nitrogen storage assembly 1, a nitrogen heating assembly 2, a sealing assembly 3, and a moisture measurement assembly 4.
In one embodiment of the present application, the opening of the nitrogen storage assembly 1 is connected to the nitrogen heating assembly 2 through a fourth switching valve 8.
Specifically, the nitrogen storage component 1 may be a nitrogen cylinder, and a fourth switch valve 8 is arranged at the opening of the nitrogen cylinder. Nitrogen is stored in the nitrogen cylinder, and when the fourth switch valve 8 is opened, nitrogen in the nitrogen cylinder is output from the nitrogen cylinder through the fourth switch valve 8. The opening part of the nitrogen cylinder is provided with a detector (not marked in the figure) for detecting the quantity of the output nitrogen.
In one embodiment of the present application, the other end of the nitrogen gas heating unit 2 is connected to the sealing unit 3 through a first communicating vessel 9, and a first on-off valve 5 is provided on the first communicating vessel 9. After the nitrogen gas is heated by the nitrogen gas heating unit 2, the first switch valve 5 is opened so that the heated nitrogen gas enters the sealing unit 3 through the first communication means 9.
Specifically, after the nitrogen gas comes out of the nitrogen gas bottle, the nitrogen gas enters the nitrogen gas heating assembly 2, the nitrogen gas heating assembly 2 is composed of a nitrogen gas flow pipe (not labeled in the figure) and a high-temperature heating component (not labeled in the figure), and the nitrogen gas in the nitrogen gas flow pipe is heated through the high-temperature heating component. In addition, a temperature sensor is arranged on the nitrogen heating assembly 2 and is used for measuring the temperature of the heated nitrogen so as to determine whether the temperature of the heated nitrogen meets the current heating requirement or not, and the measured temperature value is uploaded to a server in real time.
Further, the heated nitrogen gas is supplied to the seal assembly 3 through the first communicating vessel 9, and a first on-off valve 5 is provided between the first communicating vessel 9 and the seal assembly 3. After the temperature of the nitrogen reaches the preset temperature value, the server controls the first switch valve 5 to be opened so as to enable the nitrogen meeting the condition to seal the assembly 3. The preset temperature value can be in a preset database, and is inquired according to the environmental characteristic data of the current cable placement area to be detected.
In one embodiment of the present application, the other end of the sealing assembly 3 is connected to the moisture measuring assembly 4 via a second communication vessel 10, the second communication vessel 10 being provided with a second on-off valve 6. The cable to be detected is placed in the sealing assembly 3, moisture in the cable to be detected is evaporated in the sealing assembly 3 by heating nitrogen, and the obtained water vapor is conveyed to the moisture measuring assembly 4 by heating nitrogen under the condition that the second switch valve 6 is opened.
Specifically, the seal assembly 3 includes a seal structure (not shown), a vacuum member (not shown), a dehumidifying member (not shown), a case (not shown), and a placement groove (not shown). The sealing structure is arranged at two ends of the box body and used for ensuring that the sealing assembly 3 is in a sealing state. The vacuum component is arranged at the middle end of the outer part of the box body and is used for extracting air in the sealing structure, so that the sealing assembly 3 is in a vacuum state. The standing groove sets up in sealing component 3 box inside for place the cable of waiting to detect.
Further, the cable to be tested is placed in a placing groove in the sealing assembly 3, moisture in the sealing assembly 3 is removed by a dehumidifying component, and then air in the sealing assembly 3 is evacuated by a vacuum component. The first switch valve 5 is opened, heated nitrogen enters the sealing assembly 3, the heated nitrogen evaporates moisture in the cable to be detected, and the moisture is discharged out of the cable through two ends of the cable. Meanwhile, the entering nitrogen moves towards the second switch valve 6, so that the water vapor in the sealing assembly 3 is driven to move towards the second switch valve 6, and the moisture in the sealing assembly 3 is conveyed to the moisture measuring assembly 4 under the condition that the second switch valve 6 is opened.
In one embodiment of the present application, the moisture measuring assembly 4 includes a reaction chamber (not shown) and a weight sensor (not shown). The reaction chamber is internally provided with a reactant, the reactant is used for drying the water-containing nitrogen entering the reaction chamber, and the weight sensor is used for monitoring the weight of the reaction chamber in real time and uploading the monitored weight to the server in real time.
Specifically, the reaction chamber is a glass reaction chamber, and is filled with sufficient reactants that can react only with water and do not produce any gas. For example, the reactant in the embodiment of the present application may be phosphorus pentoxide, and nitrogen with moisture enters the moisture measuring component 4, and the moisture in the nitrogen reacts with the phosphorus pentoxide to generate metaphosphoric acid. The remaining nitrogen gas may be discharged out of the moisture measuring assembly 4 through the third switching valve 7. At this time, the weight of the water vapor entering the moisture measuring assembly 4 can be obtained by monitoring the weight change of the moisture measuring assembly 4, and the weight of the water contained in the cable to be detected can be obtained. The weighing sensor transmits the measured weight to the server in real time, and the server compares the obtained weight of the water vapor with a preset database, so that the moisture degree of the cable is obtained.
Further, the discharged nitrogen gas can be returned to the nitrogen gas storage assembly 1 again through the communicating vessel and the opened third switch valve 7, so that the nitrogen gas storage assembly can be recycled, and resources are saved. Next, the generated metaphosphoric acid may be treated by heating to perform a pollution-free treatment of the product.
Fig. 2 is a flowchart of a method for detecting a moisture content of a cable according to an embodiment of the present application. As shown in fig. 2, the method for detecting the moisture degree of the cable comprises the following steps:
S101, the server acquires environmental characteristic data of the cable placement area to be detected, and a corresponding cable wetting degree reference value is determined according to the environmental characteristic data.
In one embodiment of the application, temperature data and precipitation data corresponding to the cable placement area to be detected and external damage records of the cable placement area to be detected are obtained in a preset time period. The external damage record of the cable placing area to be detected at least comprises one or more of time when the cable is damaged by external force, equipment information for carrying out cable damage and rolling information of the cable placing area to be detected. Based on time sequence, temperature data, precipitation data and external force damage records of the cable placement area to be detected are sequentially input into a preset cable damping degree prediction model, so that a cable damping degree reference value is obtained according to the preset cable damping degree prediction model.
Specifically, the embodiment of the application takes the environmental characteristic data corresponding to different cable placement areas to be detected, which are obtained in advance, as an input sample set, and takes the wetting degree of the cables corresponding to different areas as an output sample set. The environmental characteristic data at least comprise temperature data, precipitation data and external damage records corresponding to the cable placement area to be detected. And inputting the input sample set as input, outputting the output sample set as output, and training the preset neural network model to obtain a preset cable moisture degree prediction model. Secondly, after the cable moisture degree in the sample is obtained, the embodiment of the application determines the nitrogen quantity and the temperature respectively corresponding to the cable drying treatment of different moisture degrees through a simulation experiment, and compares the nitrogen quantity and the temperature, so as to determine the optimal nitrogen quantity and the nitrogen heating temperature corresponding to the cable different moisture degrees, and establish a preset database.
Further, the current cable placement area to be detected, temperature data and precipitation data in a preset time period and external damage records of the cable placement area to be detected are obtained. For example, temperature data, precipitation data and external damage data of a cable placement area to be detected in one month can be obtained and recorded in time sequence. And sequentially inputting the recorded data into a preset cable damping degree prediction model according to the time sequence to obtain a cable damping degree reference value corresponding to the cable to be detected.
S102, the server adjusts the temperature of the nitrogen heating component 2 in the cable damp detection device and adjusts the on-off state of the switch valve component in the cable damp detection device based on the cable damp degree reference value.
In one embodiment of the present application, in the preset database, the corresponding nitrogen heating reference temperature is determined according to the cable moisture reference value, so as to perform temperature adjustment on the nitrogen heating assembly 2 according to the nitrogen heating reference temperature. When the temperature of the nitrogen heating assembly 2 reaches the nitrogen heating reference temperature, the nitrogen heating assembly 2 is controlled to stop heating, the first switch valve 5 and the second switch valve 6 are opened, heated nitrogen enters the sealing assembly 3 through the first switch valve 5, and nitrogen with water vapor enters the moisture measuring assembly 4 through the second switch valve 6.
Specifically, according to the cable damping degree reference value corresponding to the cable to be detected, determining the corresponding nitrogen heating reference temperature in a preset database. The server sends a start command to a high-temperature heating member in the nitrogen heating assembly 2, and the high-temperature heating member heats nitrogen in the nitrogen flow pipe. The temperature sensor installed on the nitrogen heating assembly 2 uploads the nitrogen heating temperature to the server in real time, and when the uploaded temperature is consistent with the temperature in the preset database, the server sends a stop instruction to the high-temperature heating member so that the nitrogen heating assembly 2 stops heating the nitrogen.
Further, the server sends an opening command to the first switching valve 5 and the second switching valve 6, and the first switching valve 5 and the second switching valve 6 are opened, at this time, heated nitrogen gas enters the sealing assembly 3 through the first communicator 9. The heated nitrogen carries out drying treatment on the cable to be detected in the sealing assembly 3, the moisture in the cable is evaporated, and the obtained water vapor moves to the position of the second switch valve 6 under the drive of the nitrogen, so that the water vapor enters the moisture measuring assembly 4.
S103, the server acquires first weight information sent by the moisture measuring component 4 in the cable damping detection device, and secondary adjustment is performed on the cable damping detection device based on the first weight information.
In one embodiment of the present application, an initial weight value sent by a load cell mounted on the moisture measurement assembly 4 is obtained, wherein the initial weight value includes at least the weight of the moisture measurement assembly 4 and the weight of the reactant placed within the moisture measurement assembly 4. After the second switch valve 6 is opened, the first weight information sent by the weighing sensor is acquired in real time. The first weight information at least includes the weight of the moisture measuring component 4, the weight of the corresponding reactant, the product and the nitrogen in the moisture measuring component 4, wherein the product is a substance generated after the reactant reacts with the water vapor in the cable to be detected.
Specifically, the heating nitrogen evaporates the moisture in the cable into water vapor, and the generated water vapor enters the moisture measuring assembly 4 under the driving of the nitrogen. The moisture measuring component 4 is provided with a reactant which reacts with moisture in advance, and the reactant does not react with nitrogen chemically. For example, the reactant in the embodiment of the present application may be phosphorus pentoxide, and after nitrogen and water vapor enter the moisture measuring component 4, the water vapor reacts with the phosphorus pentoxide to generate metaphosphoric acid. The weight of the moisture measuring device 4 changes due to the ingress of nitrogen and water vapor and the sealing of the moisture measuring device 4. The weight sensor mounted on the moisture measuring assembly 4 monitors the weight of the moisture measuring assembly 4 in real time, and as the amount of the nitrogen gas and the water vapor entering increases, the weight value monitored by the weight sensor increases.
In one embodiment of the present application, the weight increase data obtained after the water vapor in the moisture measuring assembly 4 is absorbed by the reactant is determined based on the first weight information, wherein the weight increase data is weight change data measured by a time-varying weight sensor. Based on the weight increase data, the nitrogen heating assembly 2 of the cable wetness detecting means and/or the on-off valve assembly in the cable wetness detecting means are secondarily adjusted. The switch valve assembly comprises a first switch valve 5 arranged between the nitrogen heating assembly 2 and the sealing assembly 3, a second switch valve 6 arranged between the sealing assembly 3 and the moisture measuring assembly 4, a third switch valve 7 arranged at the air outlet hole of the moisture measuring assembly 4, and a fourth switch valve 8 arranged between the nitrogen storage assembly and the nitrogen heating assembly 2.
Specifically, after the heated nitrogen gas enters the sealing assembly 3, the moisture in the cable evaporates rapidly and the water vapor gathers within a period of time, so that the amount of the water vapor entering the moisture measuring assembly 4 is large, and the weight measured by the weight sensor can be uniform or rise up at an accelerated speed. However, since the moisture in the cable gradually decreases, the amount of the generated steam gradually decreases, and thus the amount of the steam entering the moisture measuring unit 4 decreases, and at this time, the weight measured by the weight sensor increases, but the speed increase gradually decreases.
Because the actual moisture degree of the cable is not determined, in order to save resources as much as possible, the weight acceleration of the weight sensor can be detected after the first preset reaction time. If the weight measured by the weight sensor is uniform or increases rapidly, it indicates that more water is still in the cable currently, so that the quality of the heated nitrogen needs to be increased and the temperature of the nitrogen needs to be increased to ensure sufficient nitrogen to dry the cable, and meanwhile, the evaporation speed of the water in the cable can be increased to reduce the drying time of the cable. If the weight measured by the weight sensor is decreased, the current cable has less residual water, and at this time, the amount of nitrogen and the temperature of the nitrogen can be reduced to save resources, so that less nitrogen is heated.
It should be noted that, the first preset duration is a reference duration shorter than the total duration of the current cable to be detected, and the corresponding reference duration can be determined in the database according to the reference value of the cable wetting degree. For example, assuming that the current cable moisture level reference value is at the database corresponding pair of dry durations 30S, then its corresponding reference duration may be 20S.
Specifically, after reaching the first preset reaction duration, under the condition that the weight increase data is at a constant speed or increases in an acceleration manner, the server sends a temperature increasing instruction to the nitrogen heating assembly 2, the nitrogen heating assembly 2 increases the heating temperature, so that the nitrogen temperature in the nitrogen flow pipe is increased, and simultaneously, the server sends an instruction for expanding the ventilation channel to the first switch valve 5, so that the speed of heating nitrogen entering the sealing assembly 3 is increased, and the evaporation speed of water in the cable to be detected is increased. After the temperature of the nitrogen heating assembly 2 is increased and the ventilation channel of the first switch valve 5 is enlarged, the weight measured by the weight sensor is continuously monitored in real time, if the added value of the weight is in a descending trend, the heating temperature of the nitrogen heating assembly 2 is timely reduced, and the ventilation channel of the first switch valve 5 is reduced. Therefore, the temperature and the heating quantity of the nitrogen are adjusted according to different degrees of the cable to be detected in the wet state, and resources are saved.
Specifically, after the first preset reaction time period is reached, in the case where the increasing speed of the weight increase data is in a decrease, the server sends a temperature decrease instruction to the nitrogen gas heating assembly 2, and the nitrogen gas heating assembly 2 decreases the heating temperature. At the same time, the server sends a command to the first on-off valve 5 to decrease the vent passage, decreasing the rate of heated nitrogen entering the seal assembly 3. Because less moisture remains in the cable, by heating less mass of nitrogen, the heating temperature is also reduced. Therefore, the purpose of the cable drying and dehumidifying process is achieved under the condition of reducing the used resources.
In one embodiment of the application, if the heating temperature of the nitrogen gas needs to be increased, the current temperature may be increased by one half at a time. For example, the current heating temperature of nitrogen is 50 degrees, which can be increased to 75 degrees. If it is desired to increase the size of the vent channel of the first switching valve 5, the current vent channel size may be increased by one half at a time. Similarly, if the heating temperature of the nitrogen gas needs to be reduced, the current temperature can be reduced by one half at a time. For example, the current heating temperature of nitrogen is 80 degrees, which can be reduced to 40 degrees. If it is desired to reduce the size of the vent channel of the first switching valve 5, the current vent channel size may be reduced by one half at a time.
It should be noted that, each time the temperature value is increased or decreased, the embodiment of the present application is preferably set to be one half of the current temperature value, and in application, the temperature value may be adjusted and changed according to the actual situation. Similarly, the size of the channel of the first switch valve 5 that is increased or decreased each time in the embodiment of the present application is related to the current size of the channel of the first switch valve 5, and in application, the channel may be adjusted and changed according to the actual situation.
Further, in the case where the increase speed of the increase data is zero, all the on-off valves in the nitrogen heating assembly 2 and the on-off valve assembly are closed. At zero increase rate, it is indicated that the moisture inside the cable has evaporated entirely and that the heated nitrogen has brought the water vapor into the moisture measuring assembly 4, the water vapor entering the moisture measuring assembly 4 having reacted with the reactants. At this time, the third switch valve 7 is opened, the nitrogen gas is discharged through the pipe on the moisture measuring block 4, and the weight of the absorbed water vapor is increased in the moisture measuring block 4 as compared with before the dehumidification of the cable. At this time, the server sends a closing instruction to each switch valve, and the dehumidification and drying process of the cable to be detected is completed.
And S104, after the moisture in the cable to be detected is absorbed, obtaining second weight information so as to determine the corresponding moisture degree of the cable to be detected according to the second weight information.
In one embodiment of the application, if the weight value sent by the weighing sensor does not change within the second preset time period, the completion of moisture absorption in the cable to be detected is determined. And acquiring second weight information sent by the weighing sensor. The second weight information at least includes the weight of the moisture measuring component 4, and the total weight of the corresponding product and the remaining reactant in the moisture measuring component 4 after removing the nitrogen. And carrying out difference value calculation on the weight value corresponding to the second weight information and the initial weight value to obtain the water-containing weight of the cable to be detected. And comparing the water content weight of the cable to be detected with preset data to determine the moisture degree of the cable to be detected, wherein the preset data comprises different water contents corresponding to the cable and moisture degree grades corresponding to the different water contents respectively.
Specifically, the period of time after the nitrogen gas is discharged from the moisture measuring assembly 4 may be, for example, 1min, and if the weight sent by the load cell is not changed, it indicates that the moisture in the current cable is completely absorbed. At this time, the difference between the stabilized weight value and the weight value measured before the reaction is calculated, so as to obtain the weight of the moisture absorbed in the moisture measuring assembly 4, i.e. the weight of the water vapor contained in the cable to be detected.
Further, in a preset database, a reference cable with the same information as the length, the model and the like of the cable to be detected is found, and the corresponding water content of the reference cable after being placed for a period of time in the placement area is inquired. If the difference between the water content of the current cable to be detected and the water content of the reference cable is larger, for example, the water content of the current cable to be detected is one time or more than the water content of the reference cable, the current cable to be detected is possibly broken down, so that the current cable to be detected is serious in damp, and the cable needs to be replaced in time at the moment so as to ensure the stable operation of the regional power grid. If the water content of the current cable to be detected is within one time of the water content of the reference cable or is smaller than the water content of the reference cable, the current cable to be detected is in a normal user state.
Further, the difference value of the water content between the cable and the reference cable can be compared with a preset cable damping degree grade table to determine the damping grade of the cable to be detected currently.
In one embodiment of the present application, an open command is sent to the third on-off valve 7 mounted to the moisture measurement assembly 4 to cause nitrogen in the moisture measurement assembly 4 to be re-delivered to the nitrogen storage assembly 1 through the third on-off valve 7. And sending an activation instruction to a heating unit installed in the moisture measuring unit 4 to heat the product in the moisture measuring unit 4 by the heating unit to perform a contamination removal process on the product.
Specifically, the server sends a start command to the third switch valve 7, at this time, nitrogen in the moisture measurement assembly 4 may enter the communicating pipe through the third switch valve 7, one end of the communicating pipe is connected to the moisture measurement detection assembly, the other end is connected to the nitrogen storage assembly 1, and the dried nitrogen reenters the nitrogen storage assembly 1, thereby realizing nitrogen recycling. Further, a heating unit is provided outside the moisture measuring unit 4, and metaphosphoric acid generated in the moisture measuring unit 4 is heated by the heating unit to perform a decontamination process.
Fig. 3 is a schematic structural diagram of a cable moisture-affected degree detection device according to an embodiment of the present application. As shown in fig. 3, the cable wetness detecting apparatus includes,
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor, the instructions are executable by the at least one processor to enable the at least one processor to:
acquiring environmental characteristic data of a cable placement area to be detected, and determining a corresponding cable wetting degree reference value according to the environmental characteristic data; the environmental characteristic data at least comprise one or more of temperature data, precipitation data and external damage records corresponding to the cable placement area to be detected;
Based on the cable moisture degree reference value, carrying out temperature adjustment on a nitrogen heating component in a cable moisture detection device and carrying out on-off adjustment on a switching valve component in the cable moisture detection device, so that heated nitrogen with corresponding temperature and mass enters a sealing component in the cable moisture detection device to evaporate and convey moisture in a cable to be detected placed in the sealing component to a moisture measurement component;
Acquiring first weight information sent by a moisture measuring component in the cable wetting detection device, and performing secondary adjustment on the cable wetting detection device based on the first weight information; wherein the first weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing part of the moisture is related to the weight of the remaining reactants;
After the moisture in the cable to be detected is absorbed, obtaining second weight information, and determining the corresponding moisture degree of the cable to be detected according to the second weight information; wherein the second weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing all the moisture is related to the weight of the remaining reactants.
The embodiments of the present application are described in a progressive manner, and the same and similar parts of the embodiments are all referred to each other, and each embodiment is mainly described in the differences from the other embodiments. In particular, for apparatus, devices, non-volatile computer storage medium embodiments, the description is relatively simple, as it is substantially similar to method embodiments, with reference to the section of the method embodiments being relevant.
The foregoing describes certain embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the embodiments of the application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for detecting the moisture content of a cable, the method comprising:
acquiring environmental characteristic data of a cable placement area to be detected, and determining a corresponding cable wetting degree reference value according to the environmental characteristic data; the environmental characteristic data at least comprise one or more of temperature data, precipitation data and external damage records corresponding to the cable placement area to be detected;
Based on the cable moisture degree reference value, carrying out temperature adjustment on a nitrogen heating component in a cable moisture detection device and carrying out on-off adjustment on a switching valve component in the cable moisture detection device, so that heated nitrogen with corresponding temperature and mass enters a sealing component in the cable moisture detection device to evaporate and convey moisture in a cable to be detected placed in the sealing component to a moisture measurement component;
Acquiring first weight information sent by a moisture measuring component in the cable wetting detection device, and performing secondary adjustment on the cable wetting detection device based on the first weight information; wherein the first weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing part of the moisture is related to the weight of the remaining reactants;
After the moisture in the cable to be detected is absorbed, obtaining second weight information, and determining the corresponding moisture degree of the cable to be detected according to the second weight information; wherein the second weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing all the moisture is related to the weight of the remaining reactants.
2. The method for detecting the moisture content of the cable according to claim 1, wherein the temperature adjustment of the nitrogen heating component in the cable moisture content detection device and the on-off adjustment of the switch valve component in the cable moisture content detection device are based on the reference value of the moisture content of the cable, specifically comprising:
determining a nitrogen heating reference temperature corresponding to the cable damping degree reference value in a preset database, so as to regulate the temperature of the nitrogen heating assembly according to the nitrogen heating reference temperature;
Under the condition that the temperature of the nitrogen heating assembly reaches the nitrogen heating reference temperature, controlling the nitrogen heating assembly to stop heating, opening a first switch valve and a second switch valve, enabling heated nitrogen to enter the sealing assembly through the first switch valve, and enabling nitrogen with water vapor to enter the moisture measuring assembly through the second switch valve; wherein the switch valve assembly comprises the first switch valve, the second switch valve, a third switch valve and a fourth switch valve; the first switch valve is arranged between the nitrogen heating assembly and the sealing assembly, and the second switch valve is arranged between the sealing assembly and the moisture measuring assembly; the third switch valve is arranged at the exhaust pipe of the moisture measuring assembly, and the fourth switch valve is arranged between the nitrogen storage assembly and the nitrogen heating assembly.
3. The method for detecting the moisture content of a cable according to claim 2, wherein the step of acquiring the first weight information sent by the moisture measuring component in the cable moisture content detecting device specifically comprises:
Acquiring an initial weight value sent by a weighing sensor arranged on the moisture measuring component; wherein the initial weight value includes at least a weight of the moisture measurement assembly and a weight of a reactant disposed within the moisture measurement assembly;
After the second switch valve is opened, acquiring first weight information sent by the weighing sensor in real time; wherein the first weight information at least comprises the weight of the moisture measuring component, the weight of the corresponding reactant, product and nitrogen in the moisture measuring component; the product is generated after the reactant reacts with the water vapor in the cable to be detected.
4. A method for detecting the moisture content of a cable according to claim 3, wherein the secondary adjustment of the cable moisture content detecting device based on the first weight information comprises:
based on the first weight information, determining weight increase data obtained after the water vapor in the moisture measurement assembly is absorbed by the reactant; wherein the weight increase data is weight change data measured by the weighing sensor with time;
And based on the weight increase data, performing secondary adjustment on the temperature of the nitrogen heating component of the cable damp detection device and/or the size of a ventilation channel corresponding to a switch valve component in the cable damp detection device.
5. The method for detecting the moisture content of a cable according to claim 4, wherein the secondary adjustment of the temperature of the nitrogen heating component of the cable moisture content detection device and/or the size of the ventilation channel corresponding to the switch valve component in the cable moisture content detection device based on the weight increase data specifically comprises:
After reaching a first preset reaction time, under the condition that the weight increase data are in uniform speed or accelerated increase, increasing the heating temperature of the nitrogen heating assembly and expanding a ventilation channel of the first switch valve;
decreasing the heating temperature of the nitrogen heating assembly and decreasing the vent passage of the first on-off valve with the rate of increase of the weight increase data at a decrease;
and closing all the switch valves in the nitrogen heating assembly and the switch valve assembly under the condition that the increasing speed of the weight increasing data is zero.
6. The method for detecting the moisture content of a cable according to claim 3, wherein the second weight information is obtained after the moisture in the cable to be detected is absorbed, and specifically comprises:
if the weight value sent by the weighing sensor does not change within the second preset reaction time period, determining that the water in the cable to be detected is completely absorbed;
Acquiring second weight information sent by the weighing sensor; wherein the second weight information at least comprises the weight of the moisture measuring component and the total weight of corresponding products and residual reactants in the moisture measuring component after nitrogen is removed;
performing difference calculation on the weight value corresponding to the second weight information and the initial weight value to obtain the water-containing weight of the cable to be detected;
comparing the water content weight of the cable to be detected with preset data to determine the wetting degree of the cable to be detected; the preset data comprise different water contents corresponding to the cable and the corresponding damp degree grades of the different water contents.
7. The method for detecting the moisture content of a cable according to claim 1, wherein the acquiring environmental characteristic data of a region where the cable to be detected is placed so as to determine a corresponding reference value of the moisture content of the cable according to the environmental characteristic data specifically comprises:
acquiring temperature data and precipitation data corresponding to the cable placement area to be detected within a preset time period, and performing external damage recording on the cable placement area to be detected; the external damage record of the cable placement area to be detected at least comprises the time of the cable being damaged by external force, equipment information for carrying out cable damage and rolling information of the vehicle on the cable placement area to be detected;
And based on the time sequence of recording different data, sequentially inputting the temperature data, the precipitation data and the external damage records of the cable placement area to be detected into a preset cable damping degree prediction model so as to obtain the cable damping degree reference value according to the preset cable damping degree prediction model.
8. The method for detecting the moisture content of a cable according to claim 1, wherein after determining the moisture content of the cable to be detected according to the second weight information, the method further comprises:
sending an opening command to a third switch valve arranged on the moisture measurement assembly so that nitrogen in the moisture measurement assembly is re-conveyed to a nitrogen storage assembly through the third switch valve; and
And sending an activation instruction to a heating assembly installed in the moisture measuring assembly so as to heat a product in the moisture measuring assembly through the heating assembly to perform pollution removal treatment on the product.
9. A cable moisture detection device, the device comprising a nitrogen storage assembly, a nitrogen heating assembly, a sealing assembly and a moisture measurement assembly;
The opening of the nitrogen storage component is connected with the nitrogen heating component through a fourth switch valve;
The other end of the nitrogen heating component is connected with the sealing component through a first connector, and a first switch valve is arranged on the connector; after the nitrogen heating component heats the nitrogen, the first switch valve is opened so that the heated nitrogen enters the sealing component through the first communicating vessel;
The other end of the sealing assembly is connected with the moisture measuring assembly through a second communicating vessel, and a second switch valve is arranged on the second communicating vessel; the cable to be detected is placed in the sealing assembly, moisture in the cable to be detected is evaporated through heating nitrogen in the sealing assembly, and the obtained water vapor is conveyed to the moisture measuring assembly through heating nitrogen under the condition that the second switch valve is opened;
The moisture measuring assembly comprises a reaction cavity and a weight sensor; the reaction chamber is internally provided with a reactant, the reactant is used for drying the water-containing nitrogen entering the reaction chamber, and the weight sensor is used for monitoring the weight of the reaction chamber in real time and uploading the monitored weight to the server in real time.
10. A cable moisture-sensing apparatus, comprising,
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor, the instructions are executable by the at least one processor to enable the at least one processor to:
acquiring environmental characteristic data of a cable placement area to be detected, and determining a corresponding cable wetting degree reference value according to the environmental characteristic data; the environmental characteristic data at least comprise one or more of temperature data, precipitation data and external damage records corresponding to the cable placement area to be detected;
Based on the cable moisture degree reference value, carrying out temperature adjustment on a nitrogen heating component in a cable moisture detection device and carrying out on-off adjustment on a switching valve component in the cable moisture detection device, so that heated nitrogen with corresponding temperature and mass enters a sealing component in the cable moisture detection device to evaporate and convey moisture in a cable to be detected placed in the sealing component to a moisture measurement component;
Acquiring first weight information sent by a moisture measuring component in the cable wetting detection device, and performing secondary adjustment on the cable wetting detection device based on the first weight information; wherein the first weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing part of the moisture is related to the weight of the remaining reactants;
After the moisture in the cable to be detected is absorbed, obtaining second weight information, and determining the corresponding moisture degree of the cable to be detected according to the second weight information; wherein the second weight information is related to the weight of the moisture measuring assembly, and the corresponding product after absorbing all the moisture is related to the weight of the remaining reactants.
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| CN104716599A (en) * | 2015-03-30 | 2015-06-17 | 中国矿业大学(北京) | Quick repairing technology for high voltage cable which enables water to enter and is affected with dampness |
| CN113418822A (en) * | 2021-05-28 | 2021-09-21 | 虚静科技(广州)有限责任公司 | Gas saturation adsorption capacity tester and testing method thereof |
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| CN113686770B (en) * | 2021-07-27 | 2023-08-11 | 清华大学深圳国际研究生院 | Multi-factor acceleration damping test device and method for power cable |
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| CN104716599A (en) * | 2015-03-30 | 2015-06-17 | 中国矿业大学(北京) | Quick repairing technology for high voltage cable which enables water to enter and is affected with dampness |
| CN113418822A (en) * | 2021-05-28 | 2021-09-21 | 虚静科技(广州)有限责任公司 | Gas saturation adsorption capacity tester and testing method thereof |
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