CN107741342B - Automatic sampling device for oil loading and unloading - Google Patents
Automatic sampling device for oil loading and unloading Download PDFInfo
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- CN107741342B CN107741342B CN201711122301.1A CN201711122301A CN107741342B CN 107741342 B CN107741342 B CN 107741342B CN 201711122301 A CN201711122301 A CN 201711122301A CN 107741342 B CN107741342 B CN 107741342B
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- 238000005070 sampling Methods 0.000 title claims abstract description 103
- 239000007787 solid Substances 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 110
- 238000010586 diagram Methods 0.000 description 5
- 206010019233 Headaches Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to the technical field of oil quality monitoring, and discloses an automatic sampling device for oil loading and unloading, which comprises a bracket, wherein the bracket is in a semi-frame shape, a plurality of sampling barrels are fixed on the bracket through a lower base and an upper base, an air inlet pipe and an oil outlet pipe are arranged on the upper bottom surface of each sampling barrel, an oil inlet pipe and a sampling pipe are arranged on the lower bottom surface, fixing columns are distributed on the periphery of each sampling barrel, and two ends of each fixing column penetrate through a first through hole and a fourth through hole and are fixed on the lower base and the upper base. According to the invention, a small amount of oil is stored in the sampling barrel, once the consumer complains about the quality of the oil, the corresponding sampling barrel is found out according to the oiling time of the consumer and the oil information recorded by staff, the oil in the same batch is taken out for analysis, the problem source is found, and the consumer is helped to find a responsibility main body.
Description
Technical Field
The invention belongs to the technical field of oil quality monitoring, and particularly relates to an automatic sampling device for oil loading and unloading.
Background
At present, when oil transportation vehicles at a gas station are managed, the transportation route, the loading and unloading position and the like need to be strictly controlled. At present, a vehicle recorder or a loading and unloading recorder is arranged on a general vehicle, and the unloading position or the loading position of the vehicle is recorded, so that illegal addition or blending actions can be avoided to a certain extent. However, the oil product sales period of the gas station is shorter, and once the oil product has problems, consumer complaints are suffered, the oil products in different batches are not easy to trace, and favorable evidence is difficult to find for the consumer, so that the problem of relatively headache of a gas station manager is solved.
Disclosure of Invention
The invention aims to provide an automatic sampling device for oil loading and unloading, which is used for storing a small amount of oil in a sampling barrel, finding out a corresponding sampling barrel according to the oil filling time of a consumer and the oil information recorded by a staff after the consumer complains about the quality of the oil once receiving the oil, taking out the oil in the same batch for analysis, finding out the root of the problem and helping the consumer to find out a responsibility main body.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the automatic sampling device for oil loading and unloading comprises a bracket, wherein the cross section of the bracket is in a semi-frame shape, a plurality of sampling barrels are fixed on the bracket through a lower base and an upper base, a first groove is formed in the upper side surface of the lower base, a first through hole is symmetrically formed in the four corners of the lower base, and a second through hole and a third through hole are formed in the middle of the lower base; the lower side surface of the upper base is provided with a second groove, four corners of the upper base are symmetrically provided with fourth through holes, and the middle part of the upper base is provided with fifth through holes and sixth through holes;
the upper bottom surface of the sampling barrel is detachably connected with an air inlet pipe and an oil discharge pipe, and the upper bottom surface of the sampling barrel is detachably connected with an oil inlet pipe and a sampling pipe; fixing columns are distributed around each sampling barrel, and two ends of each fixing column penetrate through the first through hole and the fourth through hole and are fixed on the lower base and the upper base; the upper end of the air inlet pipe is connected with a first electromagnetic valve; the upper end of the oil drain pipe is connected with one end of a second electromagnetic valve, the other end of the second electromagnetic valve is connected with one end of an upper movable joint, and the other end of the upper movable joint is connected with an upper tee joint connecting pipe fitting; the oil inlet pipe is connected with one end of a third electromagnetic valve, the other end of the third electromagnetic valve is connected with one end of a lower movable joint, and the other end of the lower movable joint is connected with a lower tee joint connecting pipe fitting; the lower end of the sampling tube is connected with one end of a fourth electromagnetic valve, and the other end of the fourth electromagnetic valve is connected with the sampling tube;
the lower three-way connecting pipe fittings are connected to form an oil inlet pipe, and the tail end of the oil inlet pipe is connected with an oil inlet pipe main valve; the upper three-way connecting pipe fittings are connected to form an oil outlet pipe, and the tail end of the oil outlet pipe is connected with an oil outlet pipe main valve.
Further, the centers of the first through hole and the fourth through hole, the second through hole and the fifth through hole, and the third through hole and the sixth through hole are coaxial, and the centers of the first groove and the second groove are coaxial.
Further, the fixed connection is that square through holes are formed in two ends of the lower base, through holes corresponding to the square through holes are formed in the top plate of the support, screws penetrate through the square through holes and the through holes, and the lower ends of the screws are fixed through nuts.
Further, the detachable connection is that threaded holes are formed in the top surface and the bottom surface of the sampling barrel, and threads matched with the threaded holes are formed in the lower ends of the air inlet pipe and the oil discharge pipe and the upper ends of the oil inlet pipe and the sampling pipe.
Further, the sampling barrel is cylindrical or cuboid, and the first groove and the second groove are round or rectangular corresponding to the bottom surface of the sampling barrel.
Further, the lower base and the upper base are cuboid with inner chamfers.
Further, the first through hole, the second through hole, the third through hole, the fourth through hole, the fifth through hole and the sixth through hole are in clearance fit with the fixed column.
Further, threads are arranged at two ends of the fixing column, a hole corresponding to the first through hole is formed in the top plate of the support, the fixing column penetrates out of the first through hole and the fourth through hole and is fixed on the lower base and the upper base through nuts, and the lower end of the fixing column is located in the hole.
Further, rubber pads are arranged between the lower base and the nut as well as between the upper base and the nut.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is arranged at a gas station, and starts working when the oil tank truck discharges oil to the oil tank, a small amount of oil is stored in the sampling barrel, once the quality of the oil complained by a consumer is received, the corresponding sampling barrel is found out according to the oil filling time of the consumer and the oil information recorded by staff, the oil in the same batch is taken out for analysis, the problem source is found, and the consumer is helped to find a responsible main body; the oil products which do not involve quality problems or are stored to expire in a certain period are automatically discharged into the oil tanks of the gas stations for recycling, so that waste is reduced.
2. The invention is characterized in that the air inlet pipe, the oil outlet pipe, the oil inlet pipe and the sampling pipe of each sampling barrel are respectively provided with the corresponding electromagnetic valves, so that the electromagnetic valves are not interfered with each other during the respective work, and the working efficiency is improved.
3. According to the invention, each sampling barrel is clamped into the grooves of the upper base and the lower base for fixing, and meanwhile, the fixing columns are arranged around the sampling barrels for further fixing the sampling barrels, so that the whole structure of the sampling device is relatively simple, and each sampling barrel is independent in structure and convenient to assemble, disassemble and maintain.
Drawings
FIG. 1 is a schematic diagram of the whole structure of an automatic sampling device for oil loading and unloading according to the present invention.
Fig. 2 is a schematic diagram of a front view structure of an automatic sampling device for oil loading and unloading according to the present invention.
FIG. 3 is a schematic rear view of an automatic sampling device for oil loading and unloading according to the present invention.
Fig. 4 is a schematic structural diagram of a left-side view of an automatic sampling device for oil loading and unloading according to the present invention.
Fig. 5 is a schematic view of a bottom view of an automatic sampling device for oil loading and unloading according to the present invention.
FIG. 6 is a schematic diagram of a sampling barrel of an automatic sampling device for oil loading and unloading according to the present invention.
FIG. 7 is a schematic view of the lower base structure of an automatic sampling device for oil loading and unloading according to the present invention.
FIG. 8 is a schematic diagram of the upper base structure of an automatic sampling device for oil loading and unloading according to the present invention.
The reference numerals in the drawings: 1 is a bracket, 2 is a lower base, 3 is an upper base, 4 is a sampling barrel, 5 is a fixed column, 6 is an air inlet pipe, 7 is an oil discharge pipe, 8 is an oil inlet pipe, 9 is a sampling pipe, 10 is a first electromagnetic valve, 11 is a second electromagnetic valve, 12 is a third electromagnetic valve, 13 is a fourth electromagnetic valve, 14 is an upper movable joint, 15 is an upper three-way connecting pipe fitting, 16 is a lower movable joint, 17 is an oil inlet pipe total valve, 18 is an oil outlet pipe total valve, 19 is a first groove, 20 is a first through hole, 21 is a second through hole, 22 is a third through hole, 23 is a square through hole, 24 is a second groove, 25 is a fourth through hole, 26 is a fifth through hole, 27 is a sixth through hole, 28 is a lower three-way connecting pipe fitting, and 29 is a sampling pipe.
Detailed Description
The invention is further illustrated by the following examples:
example 1
As shown in fig. 1-8, an automatic sampling device for oil loading and unloading comprises a bracket 1, wherein the cross section of the bracket 1 is in a semi-frame shape, the bracket 1 is fixedly provided with a plurality of sampling barrels 4 through a lower base 2 and an upper base 3, the sampling barrels 4 are cylindrical, the lower base 2 and the upper base 3 are cuboid with inner chamfers, the bracket 1 is fixedly connected with the lower base 2, a first groove 19 is formed in the upper side surface of the lower base 2, and a first through hole 20, a second through hole 21 and a third through hole 22 are symmetrically formed in the four corners of the lower base 2; the fixed connection is that square through holes 23 are formed in two ends of the lower base 2, through holes corresponding to the square through holes 23 are formed in the top plate of the support 1, screws penetrate through the square through holes 23 and the through holes, and the lower ends of the screws are fixed through nuts. The lower side surface of the upper base 3 is provided with a second groove 24, four corners of the upper base 3 are symmetrically provided with a fourth through hole 25, and the middle part is provided with a fifth through hole 26 and a sixth through hole 27; the centers of the first through hole 20, the fourth through hole 25, the second through hole 21, the fifth through hole 26, the third through hole 22 and the sixth through hole 27 are coaxial, the centers of the first groove 19 and the second groove 24 are coaxial, and the first groove 19 and the second groove 24 are round corresponding to the bottom surface of the sampling barrel 4; the first through hole 20, the second through hole 21, the third through hole 22, the fourth through hole 25, the fifth through hole 26, and the sixth through hole 27 are in clearance fit with the fixing column 5.
The upper bottom surface of the sampling barrel 4 is detachably connected with an air inlet pipe 6 and an oil discharge pipe 7, and the upper bottom surface is detachably connected with an oil inlet pipe 8 and a sampling pipe 9; the detachable connection is that screw holes are formed in the top surface and the bottom surface of the sampling barrel 4, screw threads matched with the screw holes are formed in the lower ends of the air inlet pipe 6 and the oil discharge pipe 7, the upper ends of the oil inlet pipe 8 and the sampling pipe 9, and the air inlet pipe 6, the oil discharge pipe 7, the oil inlet pipe 8 and the sampling pipe 9 are screwed into the corresponding screw holes to be installed on the sampling barrel 4. The four sides of each sampling barrel 4 are distributed with fixing columns 5, threads are arranged at two ends of each fixing column 5, holes corresponding to the first through holes 20 are formed in the top plate of the bracket 1, the fixing columns 5 penetrate out of the first through holes 20 and the fourth through holes 25 and are fixed on the lower base 2 and the upper base 3 through nuts, the lower ends of the fixing columns 5 are located in the holes, rubber pads are arranged between the lower base 2 and the upper base 3 and the nuts, and accordingly the sampling barrels 4 between the lower base 2 and the upper base 3 are fixed. The upper end of the air inlet pipe 6 is connected with a first electromagnetic valve 10; the upper end of the oil drain pipe 7 is connected with one end of a second electromagnetic valve 11, the other end of the second electromagnetic valve 11 is connected with one end of an upper movable joint 14, and the other end of the upper movable joint 14 is connected with an upper three-way connecting pipe fitting 15; the oil inlet pipe 8 is connected with one end of the third electromagnetic valve 12, the other end of the third electromagnetic valve 12 is connected with one end of the lower movable joint 16, and the other end of the lower movable joint 16 is connected with the lower three-way connecting pipe fitting 28; the lower end of the sampling tube 9 is connected with one end of a fourth electromagnetic valve 13, and the other end of the fourth electromagnetic valve 13 is connected with a sampling tube 29.
The plurality of lower three-way connecting pipes 28 are connected to form an oil inlet pipeline, and the tail end of the oil inlet pipeline is connected with an oil inlet pipe main valve 17; the upper three-way connecting pipe fittings 15 are connected to form an oil outlet pipe, and the tail end of the oil outlet pipe is connected with an oil outlet pipe main valve 18.
In the drawings, the sampling barrel 4 is transparent, and therefore, not shown in fig. 1 to 5, and the structure and shape (cylindrical shape) thereof are schematically shown in fig. 6. In the actual use process, the number of the sampling barrels 4 can be set according to the number of the oil tanks in the gas station and the oil discharge frequency of the oil tanks, and a fixed number is compiled for each sampling barrel 4, so that the automatic sampling device can be installed near the oil tanks. The number of sampling barrels in the drawing of the embodiment is 16.
When in installation, the bracket 1 can be composed of two side plates and a top plate, or can be integrally formed, the bracket 1 is assembled or manufactured firstly, the air inlet pipe 6 and the oil outlet pipe 7 on the upper bottom surface of the sampling barrel 4 penetrate out of the corresponding second through hole 21 and third through hole 22 on the lower base 2 and are clamped into the first groove 19; the oil inlet pipe 8 and the sampling pipe 9 on the lower bottom surface of the sampling barrel 4 penetrate through the corresponding fifth through hole 26 and the sixth through hole 27 on the upper base 3 and are clamped into the second groove 24. The fixing column 5 is sleeved with a rubber pad and a nut, then passes through the fourth through hole 25 on the upper base 3, the first through hole 20 on the lower base 2 and the through hole on the bracket 1, the nut sleeved on the fixing column 5 in advance is screwed down, and then the upper end of the fixing column 5 passing through the upper base 3 and the lower end of the fixing column 5 passing through the lower base 2 are respectively fixed by the nut, namely, the two ends of the fixing column 5 passing through the lower base 2 and the upper base 3 are respectively fixed by the nuts; screws are inserted through the square through holes 23 and the through holes on the top plate of the bracket 1, and the lower ends of the screws are fixed by nuts, so that the sampling barrel 4 is integrally fixed on the bracket 1. A first electromagnetic valve 10 is connected to the upper end of the air inlet pipe 6, one end of a second electromagnetic valve 11 is connected to the upper end of the oil discharge pipe 7, a third electromagnetic valve 12 is connected to the upper end of the oil inlet pipe 8, and a fourth electromagnetic valve 13 is connected to the lower end of the sampling pipe 9. The other end of the third electromagnetic valve 12 is connected with one end of the lower movable joint 16, and the other end of the lower movable joint 16 is connected with a lower three-way connecting pipe fitting 28; the other end of the second electromagnetic valve 11 is connected with one end of the upper movable joint 14, and the other end of the upper movable joint 14 is connected with an upper three-way connecting pipe fitting 15. Because the sampling barrels 4 are arranged tightly, the oil outlet pipeline or the oil inlet pipeline can be formed after the upper tee connecting pipe fitting 15 or the lower tee connecting pipe fitting 28 are connected with each other.
It is worth to say that, one end of the oil outlet pipeline can be connected with the corresponding diesel oil tank or gasoline tank of the gas station through a hose, and one end of the oil inlet pipeline can be connected with the bypass of the oil unloading valve of the tank truck through a hose. The first electromagnetic valve 10 corresponding to each air inlet pipe 6, the second electromagnetic valve 11 corresponding to each oil drain pipe 7, the third electromagnetic valve 12 corresponding to each oil inlet pipe 8, the fourth electromagnetic valve 13 corresponding to each sampling pipe 9, the oil inlet pipe total valve 17 and the oil outlet pipe total valve 18 are connected with a central controller (a single chip microcomputer or a PLC), and whether the central controller is started or not is controlled by the central controller.
When the oil is discharged from the gas station, the invention starts to work, the controller opens the oil inlet pipe main valve 17 and the third electromagnetic valve 12 corresponding to the oil inlet pipe 7 of the corresponding empty sampling barrel 4, so that the oil enters the sampling barrel 4 when entering the oil tank of the gas station, and the oil added to the consumer by the gas station is consistent with the oil in the sampling barrel 4 in a certain period; if the sampling barrel 4 is not empty, the third electromagnetic valve 12 is opened, the oil outlet pipe main valve 18 and the second electromagnetic valve 11 corresponding to the oil outlet pipe 7 are opened, after new oil enters the sampling barrel 4, old oil in the sampling barrel 4 is flushed out from the oil outlet pipe 7, the old oil enters a diesel tank or a gasoline tank corresponding to a gas station from an oil outlet pipe, and the opening time of the second electromagnetic valve 11 can be set to ensure that the new oil can be completely replaced by the old oil. After the new oil enters the sampling barrel 4 each time, the staff records the oil information such as the oil product label, batch, production date, delivery batch and the like of the new oil. After the customer complains about the quality of the oil product, the corresponding sampling barrel 4 is found out according to the refueling time of the customer and the oil product information recorded by staff, the third electromagnetic valve 13 corresponding to the sampling pipe 9 and the first electromagnetic valve 10 corresponding to the air inlet pipe 5 are opened through the controller, the sampling barrel 4 is communicated with the atmosphere, the oil product flows out of the sampling pipe 29 due to gravity, the butted oil product can be further analyzed, and a problem root is found. For oils which do not involve quality problems or are stored to expire within a certain period of time, the oil will be automatically discharged into the oil tank of the gas station through the sampling tube 29 and reused.
Example 2
This embodiment is substantially the same as embodiment 1 except that: the sampling barrel 4 is rectangular, and the first groove 19 and the second groove 24 are rectangular.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so that all equivalent changes and modifications that are made in the construction, the features and the principle of the present invention should be included in the scope of the invention.
Claims (7)
1. The utility model provides an automatic sampling device of oil loading and unloading, includes support (1), its characterized in that, the transversal half frame shape that takes of support (1), support (1) are fixed with a plurality of sampling bucket (4) through lower base (2) and last base (3), support (1) and lower base (2) fixed connection, first recess (19) have been seted up to the last side of lower base (2), and first through-hole (20) have been seted up to the four corners symmetry of lower base (2), second through-hole (21) and third through-hole (22) have been seted up at the middle part; the lower side surface of the upper base (3) is provided with a second groove (24), four corners of the upper base (3) are symmetrically provided with a fourth through hole (25), and the middle part of the upper base is provided with a fifth through hole (26) and a sixth through hole (27); the centers of the first through hole (20) and the fourth through hole (25), the second through hole (21) and the fifth through hole (26), and the centers of the third through hole (22) and the sixth through hole (27) are coaxial, and the centers of the first groove (19) and the second groove (24) are coaxial;
the upper bottom surface of the sampling barrel (4) is detachably connected with an air inlet pipe (6) and an oil discharge pipe (7), and the lower bottom surface of the sampling barrel is detachably connected with an oil inlet pipe (8) and a sampling pipe (9); fixing columns (5) are distributed around each sampling barrel (4), two ends of each fixing column (5) penetrate through the first through hole (20) and the fourth through hole (25) and are fixed on the lower base (2) and the upper base (3), and the first through hole (20), the second through hole (21), the third through hole (22), the fourth through hole (25), the fifth through hole (26) and the sixth through hole (27) are in clearance fit with the fixing columns (5); the upper end of the air inlet pipe (6) is connected with a first electromagnetic valve (10); the upper end of the oil drain pipe (7) is connected with one end of a second electromagnetic valve (11), the other end of the second electromagnetic valve (11) is connected with one end of an upper movable joint (14), and the other end of the upper movable joint (14) is connected with an upper three-way connecting pipe fitting (15); the oil inlet pipe (8) is connected with one end of a third electromagnetic valve (12), the other end of the third electromagnetic valve (12) is connected with one end of a lower movable joint (16), and the other end of the lower movable joint (16) is connected with a lower tee joint connecting pipe fitting (28); the lower end of the sampling tube (9) is connected with one end of a fourth electromagnetic valve (13), and the other end of the fourth electromagnetic valve (13) is connected with a sampling tube (29);
the plurality of lower three-way connecting pipe fittings (28) are connected to form an oil inlet pipeline, and the tail end of the oil inlet pipeline is connected with an oil inlet pipe main valve (17); the upper three-way connecting pipe fittings (15) are connected to form an oil outlet pipe, and the tail end of the oil outlet pipe is connected with an oil outlet pipe main valve (18).
2. The automatic sampling device for oil loading and unloading according to claim 1, wherein the fixed connection is that square through holes (23) are formed in two ends of the lower base (2), through holes corresponding to the square through holes (23) are formed in a top plate of the bracket (1), screws penetrate through the square through holes (23) and the through holes, and the lower ends of the screws are fixed by nuts.
3. The automatic sampling device for oil loading and unloading according to claim 1, wherein the detachable connection is that threaded holes are formed in the top surface and the bottom surface of the sampling barrel (4), and threads matched with the threaded holes are formed in the lower ends of the air inlet pipe (6) and the oil outlet pipe (7) and the upper ends of the oil inlet pipe (8) and the sampling pipe (9).
4. An automatic oil loading and unloading sampling device according to claim 1, wherein the sampling barrel (4) is cylindrical or cuboid, and the first groove (19) and the second groove (24) are round or rectangular corresponding to the bottom surface of the sampling barrel (4).
5. An automatic oil loading and unloading sampling device according to claim 1, wherein the lower base (2) and the upper base (3) are rectangular solids with inner chamfers.
6. The automatic sampling device for oil loading and unloading according to claim 1, wherein threads are arranged at two ends of the fixing column (5), a hole corresponding to the first through hole (20) is formed in a top plate of the bracket (1), the fixing column (5) penetrates out of the first through hole (20) and the fourth through hole (25) and is fixed on the lower base (2) and the upper base (3) through nuts, and the lower end of the fixing column (5) is located in the hole.
7. An automatic oil loading and unloading sampling device according to claim 6, characterized in that rubber pads are arranged between the lower base (2) and the upper base (3) and the nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122301.1A CN107741342B (en) | 2017-11-14 | 2017-11-14 | Automatic sampling device for oil loading and unloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122301.1A CN107741342B (en) | 2017-11-14 | 2017-11-14 | Automatic sampling device for oil loading and unloading |
Publications (2)
| Publication Number | Publication Date |
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| CN107741342A CN107741342A (en) | 2018-02-27 |
| CN107741342B true CN107741342B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711122301.1A Active CN107741342B (en) | 2017-11-14 | 2017-11-14 | Automatic sampling device for oil loading and unloading |
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| CN (1) | CN107741342B (en) |
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| CN107741342A (en) | 2018-02-27 |
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