Natural gas extraction liquid sampler

Abstract

The utility model discloses a natural gas extraction liquid sampler which comprises a storage box, an equipment cavity is formed in the storage box, a heat insulation unit is arranged on the inner wall of the storage box, a cooling unit is arranged in the heat insulation unit of the storage box, a storage groove is formed in one end of the upper portion of the equipment cavity of the storage box, and a cover plate is hinged to one side of the surface of the storage box. A pulling plate is arranged on one side of the surface of the storage box, the pulling plate is in sliding connection with the storage box, and the pulling plate is fixedly attracted to the storage box through the magnetic attraction block; a sampling unit is arranged at one end away from the storage tank body in the equipment cavity. The natural gas extraction liquid sampler solves the problem of natural gas vaporization in the existing natural gas sampling process.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas extraction equipment, and in particular relates to a natural gas extraction liquid sampler. Background Art

[0002] Liquefied natural gas is mainly composed of methane and is recognized as the cleanest fossil energy on earth. It is colorless, odorless, non-toxic and non-corrosive. Its volume is about 1 / 625 of the volume of the same amount of gaseous natural gas, and its mass is only about 45% of the same volume of water. In the process of natural gas extraction, formation water or working fluid will inevitably be introduced. Therefore, sampling and analysis of this liquid plays an important guiding role in the extraction of natural gas.

[0003] After natural gas is extracted from the ground, liquid natural gas is generally stored in storage tanks. During this process, the liquid natural gas in the storage tank needs to be tested through the sampling port to ensure its safety during storage, transportation, and use. In some school-enterprise cooperation projects, laboratories are required to test liquid natural gas. At present, when laboratories sample liquid natural gas, they usually use a sampling needle to directly puncture the liquefied natural gas and suck the liquid natural gas into the sampling bottle. However, in the process of transferring the liquefied natural gas in the sampling needle to the sampling bottle, the temperature rise during the transportation process can easily cause the liquefied natural gas to vaporize, which will affect the accuracy of the test results provided by the laboratory. In addition, at present, the size of the liquid natural gas sampler is large. In order to prevent mutual interference between samples when sampling at multiple points in the storage tank, it is necessary to prepare multiple sample storage devices, which is very inconvenient. Utility Model Content

[0004] The utility model aims to provide a liquid sampler for natural gas exploitation, which solves the problem of natural gas vaporization in the existing natural gas sampling process.

[0005] The technical solution adopted by the utility model is that a natural gas extraction liquid sampler comprises a storage box, an equipment cavity is arranged in the storage box, an insulation unit is arranged on the inner wall of the storage box, a cooling unit is arranged in the insulation unit, a storage box is provided with a storage trough body at one end of the upper part of the equipment cavity, a cover plate is hingedly connected to one side of the surface of the storage box, the cover plate is fixed to the storage box by adsorption through a magnetic block, a pull plate is arranged on one side of the surface of the storage box, the pull plate is slidably connected to the storage box, and the pull plate is fixed to the storage box by adsorption through a magnetic block; a sampling unit is arranged at one end of the equipment cavity away from the storage trough body.

[0006] The utility model is also characterized in that:

[0007] The sampling unit includes a sampling tube, which is fixedly connected to a mounting block through an extraction unit. The sampling unit also includes a rotating motor, which is arranged in the equipment cavity. The output end of the rotating motor is fixedly connected to the mounting block. A sealing unit is arranged in the end of the sampling tube away from the mounting block.

[0008] The extraction unit comprises a piston, which is arranged inside the sampling tube and is slidably connected to the sampling tube. An extraction push rod is fixedly connected to one end of the piston, and the other end of the extraction push rod is fixedly connected to the mounting block.

[0009] The plugging unit comprises a plugging push rod, which is arranged inside the sampling tube. One end of the plugging push rod is fixedly connected with a plug, which is arranged at the sampling port in the sampling tube.

[0010] The cooling unit includes a power supply, which is connected to a compressor, a condenser and an evaporator through wires. The compressor, the condenser and the evaporator are connected in turn through pipes. An expansion valve is provided on the pipe between the condenser and the evaporator. The compressor, the condenser, the expansion valve and the evaporator are arranged around the bottom of the storage tank.

[0011] The heat-insulating unit comprises a vacuum layer, which is arranged close to the outer wall of the storage box, and two vacuum packaging layers are arranged in the direction of the vacuum layer away from the outer wall of the storage box, and heat-insulating layers are arranged inside the two vacuum packaging layers.

[0012] The beneficial effects of the utility model are:

[0013] The natural gas extraction liquid sampler provided by the utility model only needs to open the cover plate and rotate the sampling tube through the rotating mechanism when in use, and then the liquid natural gas in the sampling port of the storage tank can be sampled through the extraction mechanism, and after the sampling is completed, the sampling tube is sealed by the sealing mechanism to complete the extraction of the liquid natural gas after extraction, and then the sampling tube is rotated into the storage box by the rotating mechanism, and the liquid natural gas in the sampling tube can be preserved at a low temperature by the cooling mechanism and the heat insulation mechanism, thereby reducing the vaporization of the liquid natural gas caused by the temperature rise during the transportation process; the natural gas extraction liquid sampler of the utility model has a simple structure and can complete the sampling and storage of liquid natural gas at the same time, so when multi-point sampling is required, it is only necessary to prepare corresponding samplers according to the number of sampling points, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model natural gas production liquid sampler;

[0015] Figure 2 This is a schematic diagram of the connection of the sampling tube of the natural gas production liquid sampler of the utility model;

[0016] Figure 3 It is a cross-sectional view of the utility model natural gas production liquid sampler;

[0017] Figure 4 It is a partial enlarged view of A of the natural gas production liquid sampler of the utility model.

[0018] In the figure, 1. storage box, 2. storage tank, 3. cover plate, 4. pull plate, 5. sampling tube, 6. mounting block, 7. piston, 8. extraction push rod, 9. rotating motor, 10. blocking push rod, 11. plug, 12. power supply, 13. compressor, 14. condenser, 15. expansion valve, 16. evaporator, 17. vacuum layer, 18. insulation layer, 19. vacuum packaging layer, 20. equipment cavity. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0020] The utility model provides a natural gas production liquid sampler, such as Figure 1 As shown, it includes a storage box 1, a device cavity 20 is provided in the storage box 1, a heat insulation unit is provided on the inner wall of the storage box 1, a cooling unit is provided in the heat insulation unit, a storage tank body 2 is provided at one end of the upper part of the storage box 1 at the device cavity 20, a cover plate 3 is hinged on one side of the surface of the storage box 1, and the cover plate 3 is fixed to the storage box 1 by a magnetic block, a pull plate 4 is provided on one side of the surface of the storage box 1, the pull plate 4 is slidably connected to the storage box 1, and the pull plate 4 is fixed to the storage box 1 by a magnetic block; a sampling unit is provided at one end of the device cavity 20 away from the storage tank body 2. Figure 2 As shown, the sampling unit includes a sampling tube 5, and the sampling tube 5 is fixedly connected to a mounting block 6 through an extraction unit. The sampling unit is used to extract liquid natural gas into the sampling tube 5. The sampling unit also includes a rotating motor 9, which is a servo motor for forward and reverse rotation. The rotating motor 9 is arranged in the equipment cavity 20, and the output end of the rotating motor 9 is fixedly connected to the mounting block 6. When the rotating motor 9 rotates, it drives the sampling tube 5 to rotate, thereby rotating the sampling tube 5 to the outside of the storage box 1. A sealing unit is provided in one end of the sampling tube 5 away from the mounting block 6, and the sealing unit is used to seal the sampling tube 5; the extraction unit includes a piston 7, and the piston 7 is made of 316 stainless steel material. The 316 stainless steel material has low temperature resistance, sealing and corrosion resistance, and is suitable for the use scenario of the utility model. 7 is arranged inside the sampling tube 5, the piston 7 is slidably connected to the sampling tube 5, one end of the piston 7 is fixedly connected to an extraction push rod 8, the other end of the extraction push rod 8 is fixedly connected to the mounting block 6, the extraction push rod 8 is a hydraulic push rod, the extraction push rod 8 is used to drive the piston 7 to move along the sampling tube 5; the plugging unit includes a plugging push rod 10, the plugging push rod 10 is a pneumatic push rod with helium as the gas source, the pneumatic push rod with helium as the gas source is suitable for application scenarios in extremely low temperature environments, the plugging push rod 10 is arranged inside the sampling tube 5, one end of the plugging push rod 10 is fixedly connected to a plug 11, the plug 11 is arranged at the sampling port in the sampling tube 5, the plugging push rod 10 is used to drive the plug 11 to plug the sampling tube 5, the plug 11 is made of silicon nitride, silicon nitride has high strength at low temperatures and is suitable for plugging the sampling tube 5. Figure 3As shown, the cooling unit includes a power supply 12, which is a 12V lithium battery. The power supply 12 is connected to a compressor 13, a condenser 14 and an evaporator 16 through wires. The power supply 12 supplies power to the compressor 13, the condenser 14 and the evaporator 16 respectively. The compressor 13, the condenser 14 and the evaporator 16 are connected in sequence through pipes. An expansion valve 15 is provided on the pipe between the condenser 14 and the evaporator 16. The compressor 13, the condenser 14, the expansion valve 15 and the evaporator 16 are arranged around the bottom of the storage tank 2. The compressor 13 sends high-pressure and high-temperature refrigerant into the condenser 14. The condenser 14 is used to cool the high-temperature and high-pressure refrigerant and turn it into a high-pressure liquid. The high-pressure liquid flows to the expansion valve 15 through a pipe. The expansion valve 15 plays a role in regulating the flow rate of the refrigerant and reducing its temperature and pressure, so that the refrigerant enters the evaporator 16. The cooling unit is used to store the sampling tube 5 at a low temperature. Figure 4 As shown, the heat insulation unit includes a vacuum layer 17, and the vacuum layer 17 is arranged close to the outer wall of the storage box 1. The vacuum layer 17 is arranged away from the outer wall of the storage box 1. Two layers of vacuum packaging layers 19 are arranged, and the two layers of vacuum packaging layers 19 are provided with a heat insulation layer 18. The heat insulation unit is used for heat exchange between the storage box 1 and the outside. The vacuum layer 17 can effectively reduce the transfer of heat by reducing heat conduction and convection. The vacuum has a very low thermal conductivity, so it can provide good heat insulation performance. The heat insulation layer 18 is a polyurethane foam layer. The polyurethane foam has low thermal conductivity and good heat insulation performance, which can prevent the transmission of heat. The vacuum packaging layer 19 is an aluminum foil layer. The heat insulation unit uses a multi-layer insulation material structure, which can effectively reduce the impact of external heat on liquefied natural gas and extend its storage time.

[0021] The working principle of the natural gas extraction liquid sampler provided by the utility model is as follows: when in use, first reach the sampling point of the conveying pipeline in the storage tank, open the cover plate 3 and the pull plate 4, then start the rotating motor 9, the rotating motor 9 drives the sampling tube 5 to rotate so that the sampling tube 5 is rotated to the outside of the storage box 1, start the blocking push rod 10 to shrink it, so as to release the blockage of the sampling tube 5 extraction end by the plug 11, insert the sampling tube 5 into the sampling point of the conveying pipeline, so that the extraction end of the sampling tube 5 is inserted below the liquid surface, and after the insertion, start the extraction push rod 8, and the extraction push rod 8 is extracted. The piston 7 is contracted to draw liquefied natural gas into the sampling tube 5. After the extraction is completed (that is, after the extraction push rod 8 is contracted to the shortest position), the sealing push rod 10 is started, and the sampling tube 5 is sealed with the plug 11. At this time, the sampling tube 5 is pulled out of the sampling point, and the rotating motor 9 is rotated to rotate the sampling tube 5 into the storage tank 2. After that, the cover plate 3 and the pull plate 4 are closed to complete the storage. During the whole process, the cooling unit continuously cools the equipment cavity 20 in the storage box 1, and the insulation unit reduces the heat exchange between the equipment cavity 20 and the outside world.

[0022] Example 1

[0023] The natural gas production liquid sampler proposed in this embodiment is as follows: Figure 1 As shown, it includes a storage box 1, an equipment cavity 20 is provided in the storage box 1, an insulation unit is provided on the inner wall of the storage box 1, a cooling unit is provided in the insulation unit, a storage tank body 2 is provided at one end of the upper part of the storage box 1 at the equipment cavity 20, a cover plate 3 is hingedly connected to one side of the surface of the storage box 1, the cover plate 3 is fixed to the storage box 1 by adsorption through a magnetic block, a pull plate 4 is provided on one side of the surface of the storage box 1, the pull plate 4 is slidably connected to the storage box 1, and the pull plate 4 is fixed to the storage box 1 by adsorption through a magnetic block; a sampling unit is provided at one end of the equipment cavity 20 away from the storage tank body 2.

[0024] Example 2

[0025] The natural gas production liquid sampler proposed in this embodiment is as follows: Figure 1 As shown, it includes a storage box 1, a device cavity 20 is provided in the storage box 1, a heat insulation unit is provided on the inner wall of the storage box 1, a cooling unit is provided in the heat insulation unit, a storage tank body 2 is provided at one end of the upper part of the storage box 1 at the device cavity 20, a cover plate 3 is hinged on one side of the surface of the storage box 1, and the cover plate 3 is fixed to the storage box 1 by a magnetic block, a pull plate 4 is provided on one side of the surface of the storage box 1, the pull plate 4 is slidably connected to the storage box 1, and the pull plate 4 is fixed to the storage box 1 by a magnetic block; a sampling unit is provided at one end of the device cavity 20 away from the storage tank body 2. Figure 2 As shown, the sampling unit includes a sampling tube 5, which is fixedly connected to a mounting block 6 through an extraction unit. The sampling unit also includes a rotating motor 9, which is arranged in the equipment cavity 20. The output end of the rotating motor 9 is fixedly connected to the mounting block 6. A blocking unit is provided in one end of the sampling tube 5 away from the mounting block 6; the extraction unit includes a piston 7, which is arranged in the sampling tube 5, and the piston 7 is slidably connected to the sampling tube 5. An extraction push rod 8 is fixedly connected to one end of the piston 7, and the other end of the extraction push rod 8 is fixedly connected to the mounting block 6; the blocking unit includes a blocking push rod 10, which is arranged in the sampling tube 5, and a plug 11 is fixedly connected to one end of the blocking push rod 10. The plug 11 is arranged at the sampling port in the sampling tube 5.

[0026] Example 3

[0027] The natural gas production liquid sampler proposed in this embodiment is as follows: Figure 1 As shown, it includes a storage box 1, a device cavity 20 is provided in the storage box 1, a heat insulation unit is provided on the inner wall of the storage box 1, a cooling unit is provided in the heat insulation unit, a storage tank body 2 is provided at one end of the upper part of the storage box 1 at the device cavity 20, a cover plate 3 is hinged on one side of the surface of the storage box 1, and the cover plate 3 is fixed to the storage box 1 by a magnetic block, a pull plate 4 is provided on one side of the surface of the storage box 1, the pull plate 4 is slidably connected to the storage box 1, and the pull plate 4 is fixed to the storage box 1 by a magnetic block; a sampling unit is provided at one end of the device cavity 20 away from the storage tank body 2. Figure 2As shown, the sampling unit includes a sampling tube 5, and the sampling tube 5 is fixedly connected to a mounting block 6 through an extraction unit. The sampling unit also includes a rotating motor 9, which is arranged in the equipment cavity 20. The output end of the rotating motor 9 is fixedly connected to the mounting block 6. A blocking unit is provided in the end of the sampling tube 5 away from the mounting block 6. The extraction unit includes a piston 7, which is arranged in the sampling tube 5. The piston 7 is slidably connected to the sampling tube 5. An extraction push rod 8 is fixedly connected to one end of the piston 7, and the other end of the extraction push rod 8 is fixedly connected to the mounting block 6. The blocking unit includes a blocking push rod 10, which is arranged in the sampling tube 5. A plug 11 is fixedly connected to one end of the blocking push rod 10, and the plug 11 is arranged at the sampling port in the sampling tube 5. As shown in FIG. Figure 3 As shown, the cooling unit includes a power supply 12, which is connected to a compressor 13, a condenser 14 and an evaporator 16 through wires. The compressor 13, the condenser 14 and the evaporator 16 are connected in turn through pipes. An expansion valve 15 is provided on the pipe between the condenser 14 and the evaporator 16. The compressor 13, the condenser 14, the expansion valve 15 and the evaporator 16 are arranged around the bottom of the storage tank 2.

[0028] Example 4

[0029] The natural gas production liquid sampler proposed in this embodiment is as follows: Figure 1 As shown, it includes a storage box 1, a device cavity 20 is provided in the storage box 1, a heat insulation unit is provided on the inner wall of the storage box 1, a cooling unit is provided in the heat insulation unit, a storage tank body 2 is provided at one end of the upper part of the storage box 1 at the device cavity 20, a cover plate 3 is hinged on one side of the surface of the storage box 1, and the cover plate 3 is fixed to the storage box 1 by a magnetic block, a pull plate 4 is provided on one side of the surface of the storage box 1, the pull plate 4 is slidably connected to the storage box 1, and the pull plate 4 is fixed to the storage box 1 by a magnetic block; a sampling unit is provided at one end of the device cavity 20 away from the storage tank body 2. Figure 2 As shown, the sampling unit includes a sampling tube 5, and the sampling tube 5 is fixedly connected to a mounting block 6 through an extraction unit. The sampling unit also includes a rotating motor 9, which is arranged in the equipment cavity 20. The output end of the rotating motor 9 is fixedly connected to the mounting block 6. A blocking unit is provided in the end of the sampling tube 5 away from the mounting block 6. The extraction unit includes a piston 7, which is arranged in the sampling tube 5. The piston 7 is slidably connected to the sampling tube 5. An extraction push rod 8 is fixedly connected to one end of the piston 7, and the other end of the extraction push rod 8 is fixedly connected to the mounting block 6. The blocking unit includes a blocking push rod 10, which is arranged in the sampling tube 5. A plug 11 is fixedly connected to one end of the blocking push rod 10, and the plug 11 is arranged at the sampling port in the sampling tube 5. As shown in FIG. Figure 3As shown, the cooling unit includes a power supply 12, which is connected to a compressor 13, a condenser 14 and an evaporator 16 through wires, respectively. The compressor 13, the condenser 14 and the evaporator 16 are connected in sequence through pipes, and an expansion valve 15 is provided on the pipe between the condenser 14 and the evaporator 16. The compressor 13, the condenser 14, the expansion valve 15 and the evaporator 16 are arranged around the bottom of the storage tank 2. Figure 4 As shown, the heat insulating unit includes a vacuum layer 17 , which is arranged close to the outer wall of the storage box 1 , and two vacuum packaging layers 19 are arranged on the vacuum layer 17 away from the outer wall of the storage box 1 , and heat insulating layers 18 are arranged inside the two vacuum packaging layers 19 .

Claims

1. A natural gas production liquid sampler, characterized in that: The invention comprises a storage box (1), wherein an equipment cavity (20) is provided in the storage box (1), an inner wall of the storage box (1) is provided with a heat insulation unit, and a cooling unit is provided in the heat insulation unit. The storage box (1) is provided with a storage tank body (2) at one end of the upper part of the equipment cavity (20), a cover plate (3) is hingedly connected to one side of the surface of the storage box (1), and the cover plate (3) is fixed to the storage box (1) by adsorption through a magnetic block, a pull plate (4) is provided on one side of the surface of the storage box (1), and the pull plate (4) is slidably connected to the storage box (1), and the pull plate (4) is fixed to the storage box (1) by adsorption through a magnetic block; and a sampling unit is provided at one end of the equipment cavity (20) away from the storage tank body (2).

2. The natural gas production liquid sampler according to claim 1, characterized in that: The sampling unit comprises a sampling tube (5), wherein the sampling tube (5) is fixedly connected to a mounting block (6) via an extraction unit. The sampling unit further comprises a rotating motor (9), wherein the rotating motor (9) is arranged in the equipment cavity (20), wherein an output end of the rotating motor (9) is fixedly connected to the mounting block (6), and a blocking unit is arranged in an end of the sampling tube (5) away from the mounting block (6).

3. The natural gas production liquid sampler according to claim 2, characterized in that: The extraction unit comprises a piston (7), the piston (7) being arranged inside the sampling tube (5), the piston (7) being slidably connected to the sampling tube (5), one end of the piston (7) being fixedly connected to an extraction push rod (8), and the other end of the extraction push rod (8) being fixedly connected to the mounting block (6).

4. The natural gas production liquid sampler according to claim 3, characterized in that: The blocking unit comprises a blocking push rod (10), the blocking push rod (10) being arranged inside the sampling tube (5), one end of the blocking push rod (10) being fixedly connected to a plug (11), the plug (11) being arranged at a sampling port in the sampling tube (5).

5. The natural gas production liquid sampler according to claim 4, characterized in that: The cooling unit comprises a power supply (12), the power supply (12) being connected to a compressor (13), a condenser (14) and an evaporator (16) respectively through wires, the compressor (13), the condenser (14) and the evaporator (16) being connected in sequence through pipelines, an expansion valve (15) being provided on the pipeline between the condenser (14) and the evaporator (16), and the compressor (13), the condenser (14), the expansion valve (15) and the evaporator (16) being arranged around the bottom of the storage tank (2).

6. The natural gas production liquid sampler according to claim 5, characterized in that: The heat insulation unit comprises a vacuum layer (17), the vacuum layer (17) being arranged close to the outer wall of the storage box (1), the vacuum layer (17) being arranged with two vacuum packaging layers (19) in a direction away from the outer wall of the storage box (1), and heat insulation layers (18) being arranged inside the two vacuum packaging layers (19).

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