CN107725960B - Valve assembly for preventing water hammer in coal mine - Google Patents
Valve assembly for preventing water hammer in coal mine Download PDFInfo
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- CN107725960B CN107725960B CN201711128901.9A CN201711128901A CN107725960B CN 107725960 B CN107725960 B CN 107725960B CN 201711128901 A CN201711128901 A CN 201711128901A CN 107725960 B CN107725960 B CN 107725960B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 239000003245 coal Substances 0.000 title claims abstract description 48
- 230000000903 blocking effect Effects 0.000 claims abstract description 9
- 230000006378 damage Effects 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010013883 Dwarfism Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/055—Valves therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a valve component for preventing water hammer in coal mine, which comprises a shell and a foot pad arranged at the bottom of the shell, wherein the left side of the shell is connected with a water guide pipe, the shell is communicated with the water guide pipe through a check valve, a baffle is hinged inside the check valve, the top of the right side of the shell is provided with a water outlet, the left side of the water outlet is positioned on the shell and is provided with a lower connecting port, the lower connecting port is connected with a water hammer shell, a guide rod penetrates through the water hammer shell, the left side of the water hammer shell is connected with a water pipe, a blocking plug is arranged at the interface of the inner bottom of the water hammer shell and the lower connecting port, a limiting rod is arranged on the water hammer shell at the top of the blocking plug, and a pressure sensor is arranged at the bottom of the limiting rod. The invention effectively prevents the impact damage of water flow to the pump unit, simultaneously, the water flow enters the water hammer shell and is guided by the water pipe, thereby effectively reducing the impact of the water flow to the shell and improving the safety of the coal mine production process.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a valve assembly for preventing water hammer of a coal mine.
Background
Coal mines are areas where mankind is mining coal resources in coal-rich mining areas, and are generally classified into underground coal mines and open pit coal mines. When the coal seam is far from the earth surface, coal is generally selected to be extracted from underground mining roadways, which is an underground coal mine. When the distance between the coal seam and the ground surface is very short, the earth surface soil layer is generally stripped directly to excavate coal, and the coal is an open pit coal mine. Most of coal mines in China belong to underground coal mines. Coal mine range includes large areas of above-ground and below-ground and related facilities. Coal mines are reasonable spaces that humans excavate when mining coal-rich geologic formations, and generally include roadways, shaft pits, and face formations, among others. Coal is the most predominant solid fuel, one of the combustible organic rocks. The plant is formed by gradually accumulating a plurality of plants growing in a certain geologic period into a thick layer in a proper geologic environment, burying the thick layer in water bottom or sediment, and carrying out natural coalification in the long geologic period. The most productive coal in the formations of the carbolic, di-lap, dwarfism and third phases is an important coal-producing age in every geological period of the world. The carbon content of the coal is generally 46-97%, and the coal is brown to black and has a dull to metallic luster. Coal is classified into four types of peat, lignite, bituminous coal and anthracite coal according to the degree of coalification.
In the coal mining process, drainage equipment such as a pump is needed, when a pump room and a pipeline system are installed, the phenomenon that when the system is operated, the pipeline system can generate a large water impact force at the moment of artificial pump stopping or unexpected power failure, the water pump, a valve and a pipeline are impacted, some possible water hits are light, but some are serious, and serious quality accidents are generated even more. The existing protection measures for preventing the water hammer device are single, the protection effect is not ideal, the change of the impact force of water flow cannot be monitored in real time, data cannot be provided, the follow-up monitoring and comparison are convenient, and the maintenance of equipment is not facilitated.
Disclosure of Invention
The invention aims to provide a valve assembly for preventing water hammer in coal mine, which is used for avoiding or relieving the impact force of water in a pipeline system at the moment of stopping a pump and cutting off a power supply, avoiding the harm caused by the water hammer and improving the safety of coal mine production.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a valve assembly for preventing water hammer in colliery, includes the casing and sets up in the pad foot of casing bottom, the casing left side is connected with the water guide pipe, communicate through the check valve between casing and the water guide pipe, the inside articulated baffle that has of check valve, casing right side top is equipped with the delivery port, the delivery port left side is located and is equipped with down the connector on the casing, be connected with the water hammer casing on the connector down, it has the guide arm to run through on the water hammer casing, water hammer casing left side is connected with the raceway, bottom and lower connector interface department are equipped with the fender stopper in the water hammer casing, the fender stopper top is located and is equipped with the gag lever post on the water hammer casing, the gag lever post bottom is equipped with pressure sensor, the lower connector left side is equipped with the compressed air tank, compressed air tank one side is connected with the air duct, the air duct runs through in the casing setting, the air duct bottom is installed the air duct cover, be close to compressed air tank one side on the air duct and be equipped with the solenoid valve.
Preferably, the foot pad is a groove-shaped steel, a positioning hole is formed in one side of the bottom of the foot pad, and the shell and the foot pad are fixed in a welding mode.
Preferably, the baffle is hinged through a movable pin, a limiting frame is arranged on the check valve and positioned on the left side of the baffle, and a piston rod is arranged on one side of the bottom of the baffle.
Preferably, flanges are welded on the lower connecting port and the water hammer shell, and the flanges are fixedly connected through bolts.
Preferably, the top of the guide rod is provided with a pressing plate, and the bottom of the guide rod is welded with a pressing block.
Preferably, the electromagnetic valve is electrically connected with the pressure sensor.
Preferably, the air duct is of an inverted U shape, a waterproof and breathable film is arranged in the air duct, and the number of layers of the waterproof and breathable film is not less than three.
Preferably, the body of the housing is tubular.
Preferably, the air in the compressed air tank is pressed into the air duct used in the shell and is made of stainless steel, a waterproof breathable film is arranged in the end air guide cover, and the number of layers of the waterproof breathable film is not less than three, so that water is effectively prevented from entering the tank.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the check valve is arranged at the joint of the shell and the water guide pipe, and the water hammer phenomenon can be effectively prevented from impacting and damaging the pump unit by utilizing the opening and closing of the check valve controlled by the water flow direction;
(2) The water hammer shell is internally provided with water flow which is guided by the water pipe, so that the impact of the water flow on the shell is effectively reduced;
(3) The pressure sensor is utilized to sense the acting force of water flow, the impact force generated by the water flow can be monitored in real time, data comparison is provided, the air duct is controlled to be opened and closed through the electromagnetic valve, compressed air can be introduced to eliminate the impact force of the water flow when the water hammer phenomenon occurs, the triple protection effect is achieved, and the safety of a pump unit in the coal mine production process is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in a normal operation state;
FIG. 2 is a schematic view of the structure of the present invention in the working state when the water hammer phenomenon occurs;
fig. 3 is an enlarged schematic view of the structure of the present invention at a.
In the figure: 1 a shell, 2 foot pads, 3 a water guide pipe, 4 a check valve, 5 a baffle, 6 a movable pin, 7 a piston rod, 8 a limit frame, 9 a water outlet, 10 a lower connecting port, 11 a flange, 12 a water hammer shell, 13 a guide rod, 14 a pressing plate, 15 a water pipe, 16 a gas guide pipe, 17 a gas guide cover, 18 an electromagnetic valve, 19 a compressed air tank, 20 a pressing block, 21 a limit rod, 22 a pressure sensor and 23 a blocking plug.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
referring to fig. 1-3, the present invention provides a technical solution: the valve component for preventing water hammer of coal mine comprises a shell 1 and a foot pad 2 arranged at the bottom of the shell 1, wherein the left side of the shell 1 is connected with a water guide pipe 3, the shell 1 is communicated with the water guide pipe 3 through a check valve 4, a baffle 5 is hinged inside the check valve 4, a water outlet 9 is arranged at the top of the right side of the shell 1, a lower connecting port 10 is arranged on the left side of the water outlet 9, a water hammer shell 12 is connected to the lower connecting port 10, a guide rod 13 penetrates through the water hammer shell 12, a water pipe 15 is connected to the left side of the water hammer shell 12, a stop plug 23 is arranged at the joint of the bottom in the water hammer shell 12 and the lower connecting port 10, a stop rod 21 is arranged at the top of the stop plug 23, a pressure sensor 22 is arranged at the bottom of the stop rod 21, a compressed air tank 19 is arranged at the left side of the lower connecting port 10, an air guide pipe 16 is connected to one side of the compressed air tank 19, the air guide pipe 16 penetrates through the shell 1, an air guide pipe 16 cover 17 is arranged at the bottom of the air guide pipe 16, an air guide pipe 16 is connected to the air guide pipe 16, an electromagnetic valve 16 is arranged at one side of the air guide rod 16 near the air tank 12, a flange 5 is welded to the bottom of the air guide rod 11, a flange is welded to the air guide rod 2, a flange is welded to the air guide rod 11 is arranged at one side of the air guide rod, a side of the air guide rod is welded to the air guide rod 11, and the air guide rod is welded to the air guide rod 11, and is welded to the air guide rod 2, and is welded to the air guide rod is the air guide valve by the air. The inside of the air guide cover 17 is provided with a waterproof and breathable film, and the number of layers of the waterproof and breathable film is not less than three. The body of the shell is tubular.
The valve assembly for preventing the water hammer for the coal mine, provided by the invention, is used for avoiding the harm of the water hammer during working by the following steps:
s1: the water pump works normally, and the baffle plate in the check valve is opened under the impact of water flow;
s2: when the water pump works and is in power failure or power failure, water flow shock waves are generated to flow to the left side of the shell due to the inertia of pressure water flow;
s3: the baffle in the check valve resets under the impact of water flow, so that the water flow cannot enter the water guide pipe, and damage to the pump unit is avoided;
s4: a blocking plug is arranged at the interface of the inner bottom of the water hammer shell and the lower connecting port, and is opened under the impact of water flow, and the water flow enters the water hammer shell and is guided by a water pipe;
s5: the limiting block and the pressure sensor at the bottom of the water hammer shell detect pressure in the upward process of water flow and the blocking plug, a pressure signal is transmitted to external control equipment, then the control equipment is used for controlling the opening of the electromagnetic valve, and air in the compressed air tank is pressed into the shell to form a reverse acting force so as to counteract the water flow impact force of the shell; the air guide pipe used in the shell is a stainless steel air guide pipe, a waterproof and breathable film is arranged in the end air guide cover, and the number of layers of the waterproof and breathable film is not less than three, so that water can be effectively prevented from entering the shell.
To sum up: according to the valve component for preventing the water hammer in the coal mine, the check valve is arranged at the joint of the shell and the water guide pipe, the check valve controlled by the water flow direction is opened and closed, so that when the water hammer phenomenon occurs, water flow can be effectively prevented from impacting and damaging the pump unit, meanwhile, water flow enters the water hammer shell, the water flow is guided through the water guide pipe, the impact of the water flow on the shell is effectively reduced, meanwhile, the pressure is sensed by utilizing the acting force of the pressure sensor and the water flow, the impact force generated by the water flow can be monitored in real time, the data comparison is provided, the opening and closing of the air guide pipe is controlled through the electromagnetic valve, and compressed air can be introduced to eliminate the impact force of the water flow when the water hammer phenomenon occurs, so that the triple protection effect is achieved, and the safety of the pump unit in the coal mine production process is improved.
Example 2:
referring to fig. 1-3, the present invention provides a technical solution: the valve component for preventing water hammer of coal mine comprises a shell 1 and a foot pad 2 arranged at the bottom of the shell 1, wherein the left side of the shell 1 is connected with a water guide pipe 3, the shell 1 is communicated with the water guide pipe 3 through a check valve 4, a baffle 5 is hinged inside the check valve 4, a water outlet 9 is arranged at the top of the right side of the shell 1, a lower connecting port 10 is arranged on the left side of the water outlet 9, a water hammer shell 12 is connected to the lower connecting port 10, a guide rod 13 penetrates through the water hammer shell 12, a water pipe 15 is connected to the left side of the water hammer shell 12, a stop plug 23 is arranged at the joint of the bottom in the water hammer shell 12 and the lower connecting port 10, a stop rod 21 is arranged at the top of the stop plug 23, a pressure sensor 22 is arranged at the bottom of the stop rod 21, a compressed air tank 19 is arranged at the left side of the lower connecting port 10, an air guide pipe 16 is connected to one side of the compressed air tank 19, the air guide pipe 16 penetrates through the shell 1, an air guide pipe 16 cover 17 is arranged at the bottom of the air guide pipe 16, an air guide pipe 16 is connected to the air guide pipe 16, an electromagnetic valve 16 is arranged at one side of the air guide rod 16 near the air tank 12, a flange 5 is welded to the bottom of the air guide rod 11, a flange is welded to the air guide rod 2, a flange is welded to the air guide rod 11 is arranged at one side of the air guide rod, a side of the air guide rod is welded to the air guide rod 11, and the air guide rod is welded to the air guide rod 11, and is welded to the air guide rod 2, and is welded to the air guide rod is the air guide valve by the air. The inside of the air guide cover 17 is provided with a waterproof and breathable film, and the number of layers of the waterproof and breathable film is not less than three. The body of the shell is tubular.
The valve assembly for preventing the water hammer for the coal mine, provided by the invention, is used for avoiding the harm of the water hammer during working by the following steps:
s1: the water pump works normally, and the baffle plate in the check valve is opened under the impact of water flow;
s2: when the water pump works and is in power failure or power failure, water flow shock waves are generated to flow to the left side of the shell due to the inertia of pressure water flow;
s3: the baffle in the check valve resets under the impact of water flow, so that the water flow cannot enter the water guide pipe, and damage to the pump unit is avoided;
s4: a blocking plug is arranged at the interface of the inner bottom of the water hammer shell and the lower connecting port, and is opened under the impact of water flow, and the water flow enters the water hammer shell and is guided by a water pipe;
s5: the limiting block and the pressure sensor at the bottom of the water hammer shell detect the pressure of water in the upward process of water flow and the blocking plug, the pressure sensor transmits a pressure signal to external control equipment, the control equipment is used for controlling the opening of the electromagnetic valve, and air in the compressed air tank is pressed into the shell to form a reverse acting force so as to counteract the water flow impact force of the shell; the air guide pipe used in the shell is a stainless steel air guide pipe, a waterproof and breathable film is arranged in the end air guide cover, and the number of layers of the waterproof and breathable film is not less than three, so that water can be effectively prevented from entering the shell.
In order to better reduce or avoid the damage of the water hammer, the pressure detected by the pressure sensor 22 is P, and when the pressure P must be greater than or equal to a preset threshold P1, the control device controls the solenoid valve 18 to open, so that the high-pressure air with the mass of M1 enters the casing 1, and at this time, the flow rate of the high-pressure air at the solenoid valve 18 is V1; when the pressure detected by the pressure sensor 22 is P2 (P2 > 1.5P1), the control device controls the electromagnetic valve 18 to be opened, so that high-pressure air with the mass of M2 enters the shell 1, and the flow rate of the high-pressure air at the electromagnetic valve 18 is V2; wherein each parameter satisfies the following relationship at different pressures P detected by the pressure sensor 22:
in the above formula, alpha is a seasonal environmental temperature coefficient, and when the environmental temperature is above 15 ℃, alpha is 2.5-3.7, preferably 3; alpha is 4.8-6.6, preferably 6, when the ambient temperature is below 5 degrees celsius; when the ambient temperature is 5 degrees celsius or more and 15 degrees celsius or less, α is 4 to 4.7, preferably 4.5.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A valve assembly for preventing water hammer in coal mines, the valve assembly comprising a housing (1) and a foot pad (2) arranged at the bottom of the housing (1), characterized in that: the utility model discloses a water hammer device, including casing (1), connecting rod (13) are connected with in casing (1) left side, connect through check valve (4) between casing (1) and water conduit (3), the inside articulated baffle (5) that has of check valve (4), casing (1) right side top is equipped with delivery port (9), delivery port (9) left side is located and is equipped with down connector (10) on casing (1), be connected with water hammer casing (12) on lower connector (10), run through on water hammer casing (12) guide arm (13), water hammer casing (12) left side is connected with raceway (15), bottom and lower connector (10) interface department are equipped with stopper (23) in water hammer casing (12), stopper (23) top is located and is equipped with gag lever post (21) on water hammer casing (12), gag lever post (21) bottom is equipped with pressure sensor (22), lower connector (10) left side is equipped with compressed air tank (19), compressed air tank (19) one side is connected with air duct (16), air duct (16) are provided with raceway (1) in the casing (16), install air duct (17), an electromagnetic valve (18) is arranged on one side, close to the compressed air tank (19), of the air guide pipe (16); the electromagnetic valve (18) is electrically connected with the pressure sensor (22);
when the valve assembly for preventing the water hammer of the coal mine works, the harm of the water hammer is avoided by the following steps:
s1: the water pump works normally, and the baffle plate in the check valve is opened under the impact of water flow;
s2: when the water pump works and is in power failure or power failure, water flow shock waves are generated to flow to the left side of the shell due to the inertia of pressure water flow;
s3: the baffle in the check valve resets under the impact of water flow, so that the water flow cannot enter the water guide pipe, and damage to the pump unit is avoided;
s4: a blocking plug is arranged at the interface of the inner bottom of the water hammer shell and the lower connecting port, and is opened under the impact of water flow, and the water flow enters the water hammer shell and is guided by a water pipe;
s5: the limiting block and the pressure sensor at the bottom of the water hammer shell detect the pressure of water in the upward process of water flow and the blocking plug, the pressure sensor transmits a pressure signal to external control equipment, the control equipment is used for controlling the opening of the electromagnetic valve, and air in the compressed air tank is pressed into the shell to form a reverse acting force so as to counteract the water flow impact force of the shell; the air guide pipe used in the shell is a stainless steel air guide pipe, a waterproof and breathable film is arranged in the end air guide cover, and the number of layers of the waterproof and breathable film is not less than three, so that water can be effectively prevented from entering the shell.
2. A water hammer prevention valve assembly for a coal mine as claimed in claim 1, wherein: the foot pad (2) is groove-shaped steel, a positioning hole is formed in one side of the upper bottom of the foot pad (2), and the shell (1) and the foot pad (2) are fixed in a welding mode.
3. A water hammer prevention valve assembly for a coal mine as claimed in claim 1, wherein: the baffle (5) is hinged through a movable pin (6), a limiting frame (8) is arranged on the check valve (4) and positioned on the left side of the baffle (5), and a piston rod (7) is arranged on one side of the bottom of the baffle (5).
4. A water hammer prevention valve assembly for a coal mine as claimed in claim 1, wherein: the lower connecting port (10) and the water hammer shell (12) are welded with flanges (11), and the flanges (11) are fixedly connected through bolts.
5. A water hammer prevention valve assembly for a coal mine as claimed in claim 1, wherein: the top of the guide rod (13) is provided with a pressing plate (14), and the bottom of the guide rod (13) is welded with a pressing block (20).
6. A water hammer prevention valve assembly for a coal mine as claimed in claim 1, wherein: the air duct (16) is of an inverted U shape.
7. A water hammer prevention valve assembly for a coal mine as claimed in claim 1, wherein: the pressure detected by the pressure sensor (22) is P, when the pressure P is required to be greater than or equal to a preset threshold value P1, the control equipment controls the electromagnetic valve (18) to be opened, so that high-pressure air with the mass of M1 enters the shell (1), and the flow rate of the high-pressure air at the electromagnetic valve (18) is V1; when the pressure detected by the pressure sensor (22) is P2, the control device controls the electromagnetic valve (18) to be opened, so that high-pressure air with the mass of M2 enters the shell (1), and the flow speed of the high-pressure air at the electromagnetic valve (18) is V2; wherein P2 > 1.5P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128901.9A CN107725960B (en) | 2017-11-15 | 2017-11-15 | Valve assembly for preventing water hammer in coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128901.9A CN107725960B (en) | 2017-11-15 | 2017-11-15 | Valve assembly for preventing water hammer in coal mine |
Publications (2)
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| CN109185596B (en) * | 2018-09-05 | 2020-06-12 | 辽宁石油化工大学 | Water-hammer-preventing structure for pipeline |
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| CN107725960A (en) | 2018-02-23 |
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