Sampling device for natural gas production

Abstract

The utility model relates to the technical field of natural gas production equipment, in particular to a sampling device for natural gas production, which comprises a branch pipeline connected with a natural gas pipeline and a sampling assembly, the outer end of the branch pipeline is connected with a sealing assembly, and the sampling assembly comprises a connecting sleeve and a sampling rod. The connecting sleeve is detachably connected with the outer end of the sealing assembly, the sampling rod is slidably connected with the connecting sleeve, and the connecting sleeve is connected with a sampling pipe; the sealing assembly comprises a first sealing pipe and a second sealing pipe which are sequentially connected with the branch pipeline, a sealing ball is arranged in the first sealing pipe, an elastic sealing piece is arranged in the second sealing pipe, and the elastic sealing piece makes contact with the sealing ball. The sampling assembly is connected with the sealing assembly, the sampling rod pushes the elastic sealing piece to move, the sampling rate is adjusted by pushing and adjusting the position of the sealing ball, and the sampling efficiency of natural gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas production equipment, and specifically relates to a sampling device for natural gas production. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcano gas, coalbed methane, and biogenic gas, etc.). The long-term commonly used definition of "natural gas" is a narrow definition from an energy perspective, referring to a mixture of hydrocarbon and non-hydrocarbon gases naturally stored in the strata. In petroleum geology, it usually refers to oilfield gas and gas field gas. Its composition is mainly hydrocarbon and contains non-hydrocarbon gases. The main use of natural gas is as fuel, and it can be used to manufacture carbon black, chemical drugs, and liquefied petroleum gas. Propane and butane produced from natural gas are important raw materials for modern industry. Natural gas is mainly composed of a mixture of gaseous low-molecular hydrocarbons and non-hydrocarbon gases.

[0003] After natural gas is produced and transported, component analysis is required. By connecting a sampling device to the natural gas pipeline, the gas inside the pipeline is released. The existing natural gas sampling devices usually connect a sampling pipe to the natural gas pipeline, with a relatively simple structure, and it is easy to cause natural gas leakage during the sampling process. To solve the above problems, a new type of sampling device for natural gas production with the Chinese patent publication number CN214472083U includes a conveying pipeline, and a fixed pipe is installed on the side wall of the conveying pipeline. When the device is in use, the connecting pipe is sleeved above the fixed pipe through the internal side wall thread of the connecting pipe. The threaded connection facilitates the disassembly and assembly of the connecting pipe. The control valve on the fixed pipe is used to open and close the conveying of the fixed pipe to prevent natural gas leakage during the installation of the connecting pipe. During sampling, the micro cylinder in the sampling pipe drives the telescopic rod to drive the blocking plate to rise, and the sampling hole is opened due to the movement of the blocking plate. The sealing ball rises due to the pressure difference on both sides, and natural gas enters the sampling pipe through the sealing pipe. The circulating water cooling device on the right side of the sampling pipe cools the sampled natural gas to prevent scalding accidents. When sampling is completed, the blocking plate is pushed back to its original position by the reset spring, and the sealing ball falls to seal the sealing pipe.

[0004] However, when the device is in use, since the inner diameter of the sealing pipe is fixed, the sampling rate of natural gas cannot be adjusted. When the sampling volume is large, the sampling time is long.

[0005] Therefore, this application provides a sampling device for natural gas production to solve the problems of poor sealing effect and inconvenient adjustment of sampling efficiency of the existing natural gas sampling devices. Summary of the Utility Model

[0006] To solve the above problems, the utility model provides a sampling device for natural gas production.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows: A sampling device for natural gas production, including a branch pipeline connected to a natural gas pipeline and a sampling assembly. The outer end of the branch pipeline is connected with a sealing assembly. The sampling assembly includes a connecting sleeve and a sampling rod. The connecting sleeve is detachably connected to the outer end of the sealing assembly. The sampling rod is slidably connected to the connecting sleeve, and a sampling pipe is connected to the connecting sleeve;

[0008] The sealing assembly includes a first sealing pipe and a second sealing pipe sequentially connected to the branch pipeline. A sealing ball is arranged inside the first sealing pipe, and an elastic sealing member is arranged inside the second sealing pipe. The elastic sealing member contacts the sealing ball.

[0009] As an optimization, an electromagnetic valve is connected to the branch pipeline. The branch pipeline is hermetically connected to the first sealing pipe. An elastic retaining piece is arranged inside the first sealing pipe. The sealing ball is located between the elastic retaining piece and the elastic sealing member. A connecting pipe is arranged at the outer end of the second sealing pipe, and the connecting pipe is detachably connected to the connecting sleeve.

[0010] As an optimization, a first adjustment cavity and a second adjustment cavity are arranged inside the first sealing pipe. The first adjustment cavity is adjacent to the branch pipeline. The diameter of the first adjustment cavity is larger than that of the second adjustment cavity. The diameter of the second adjustment cavity is larger than that of the sealing ball.

[0011] As an optimization, the elastic sealing member includes an adjustment rod, a support spring, and a sealing block. The sealing block is in sealing contact with the inner side of the open end of the second sealing pipe. One end of the adjustment rod is fixedly connected to the sealing block. The other end of the adjustment rod is connected with a push block. The push block contacts the sealing ball. One end of the support spring is fixedly connected to the end of the second sealing pipe connected to the first sealing pipe, and the other end of the support spring is fixedly connected to the sealing block.

[0012] As an optimization, a sampling opening is arranged at the end of the second sealing pipe far from the first sealing pipe. The diameter of the sampling opening is smaller than the inner diameter of the second sealing pipe.

[0013] As an optimization, the sampling rod is slidably and hermetically connected to the connecting sleeve, and a handle is connected to the outer end of the sampling rod.

[0014] The sampling device for natural gas production in this solution has the following beneficial effects:

[0015] When the natural gas sampling device of this application is specifically used, it is connected to the sealing assembly through the sampling assembly. The sampling rod pushes the elastic sealing member to move, and the position of the sealing ball is adjusted by pushing to realize the adjustment of the sampling rate, improving the sampling efficiency of natural gas;

[0016] The present application is provided with sealing structures inside the branch pipeline, the first sealing pipe, and the second sealing pipe, which improves the sealing performance of the sampling device and avoids natural gas leakage. Description of the Drawings

[0017] Appendix Figure 1 This is an axonometric schematic diagram of the present utility model with the sampling assembly omitted.

[0018] Appendix Figure 2 This is a front view schematic diagram of the present utility model in the use state.

[0019] Appendix Figure 3 This is of the present utility model Figure 2 Schematic cross-sectional structure diagram taken along line A-A.

[0020] Among them, 1, natural gas pipeline; 2, branch pipeline; 3, connecting sleeve; 4, sampling rod; 5, sampling pipe; 6, first sealing pipe; 7, second sealing pipe; 8, sealing ball; 9, solenoid valve; 10, elastic retaining piece; 11, connecting pipe; 12, first adjustment cavity; 13, second adjustment cavity; 14, adjustment rod; 15, support spring; 16, sealing block; 17, sampling opening. Detailed Embodiment

[0021] As Figures 1-3 shown, a sampling device for natural gas production includes a branch pipeline 2 connected to a natural gas pipeline 1 and a sampling assembly. The outer end of the branch pipeline 2 is connected with a sealing assembly. The sampling assembly includes a connecting sleeve 3 and a sampling rod 4. The connecting sleeve 3 is detachably connected to the outer end of the sealing assembly. The sampling rod 4 is slidably connected to the connecting sleeve 3. A sampling pipe 5 is connected to the connecting sleeve 3;

[0022] The sealing assembly includes a first sealing pipe 6 and a second sealing pipe 7 sequentially connected to the branch pipeline 2. A sealing ball 8 is provided inside the first sealing pipe 6, and an elastic sealing member is provided inside the second sealing pipe 7. The elastic sealing member contacts the sealing ball 8.

[0023] The branch pipeline 2 is perpendicularly connected to the natural gas pipeline 1, and the branch pipeline 2 is coaxially connected to the first sealing pipe 6 and the second sealing pipe 7.

[0024] As Figure 3 shown, a solenoid valve 9 is connected to the branch pipeline 2. The branch pipeline 2 is hermetically connected to the first sealing pipe 6. An elastic retaining piece 10 is provided inside the first sealing pipe 6. The sealing ball 8 is located between the elastic retaining piece 10 and the elastic sealing member. A connecting pipe 11 is provided at the outer end of the second sealing pipe 7. The connecting pipe 11 is detachably connected to the connecting sleeve 3.

[0025] The length of the elastic retaining piece 10 is greater than the radius of the first sealing pipe 6. The elastic retaining piece 10 is connected to the inner wall of the first sealing pipe 6 through a spring rotating shaft, so that the elastic retaining piece 10 and the sealing ball 8 are kept in a tightly pressed state.

[0026] As Figure 3 shown, a first adjustment cavity 12 and a second adjustment cavity 13 are provided inside the first sealing pipe 6. The first adjustment cavity 12 is arranged adjacent to the branch pipe 2. The diameter of the first adjustment cavity 12 is greater than the diameter of the second adjustment cavity 13, and the diameter of the second adjustment cavity 13 is greater than the diameter of the sealing ball 8.

[0027] The connection between the first sealing pipe 6 and the second sealing pipe 7 has an excessive inclination, and the diameter of the second adjustment cavity 13 is slightly greater than the diameter of the sealing ball 8.

[0028] As Figure 3 shown, the elastic sealing member includes an adjusting rod 14, a support spring 15 and a sealing block 16. The sealing block 16 is in sealing contact with the inner side of the open end of the second sealing pipe 7. One end of the adjusting rod 14 is fixedly connected to the sealing block 16, and a push block is connected to the other end of the adjusting rod 14. The push block contacts the sealing ball 8. One end of the support spring 15 is fixedly connected to the end where the second sealing pipe 7 is connected to the first sealing pipe 6, and the other end of the support spring 15 is fixedly connected to the sealing block 16.

[0029] As Figure 3 shown, the diameter of the sampling opening 17 is smaller than the inner diameter of the second sealing pipe 7.

[0030] The sampling rod 4 is slidably and sealingly connected to the connecting sleeve 3, and a handle is connected to the outer end of the sampling rod 4.

[0031] When the device is specifically used, the connecting sleeve 3 is sleeved on the connecting pipe 11, and the connecting sleeve 3 is sealingly connected to the connecting pipe 11;

[0032] Connect a hose of a sampling container to the sampling pipe 5;

[0033] Push the sampling rod 4 to move the sampling rod 4 to push the sealing block 16 to move, so that the adjusting rod 14 pushes the sealing ball 8 to move, and the second adjustment cavity 13 is communicated with the inside of the second sealing pipe 7;

[0034] Open the solenoid valve 9 to communicate the inside of the natural gas pipeline 1 with the branch pipe 2, so that the natural gas enters the first sealing pipe 6, the second sealing pipe 7 and the connecting pipe 11 through the branch pipe 2, and finally enters the sampling container through the connecting sleeve 3 and the sampling pipe 5;

[0035] Continue to push the adjusting rod 14 to make the sealing ball 8 enter the first sealing cavity from the second sealing cavity, increase the gas flow rate of the natural gas, and improve the sampling efficiency;

[0036] After sampling is completed, close the solenoid valve 9, loosen the sampling rod 4, the sealing block 16 seals the inner wall of the second sealing tube 7, and the sealing ball 8 seals the inner side of the first sealing tube 6 under the action of the elastic retaining piece 10, then the connecting sleeve 3 can be removed.

[0037] The above specific implementation manners are only specific cases of the present utility model. The patent protection scope of the present utility model includes but is not limited to the product forms and styles of the above specific implementation manners. Any sampling device for natural gas production that conforms to the claims of the present utility model and any appropriate changes or modifications made by those of ordinary skill in the relevant technical fields shall fall within the patent protection scope of the present utility model.

Claims

1. A sampling device for natural gas production, comprising a branch pipeline (2) connected to a natural gas pipeline (1) and a sampling assembly, characterized in that: The outer end of the branch pipe (2) is connected with a sealing assembly. The sampling assembly includes a connecting sleeve (3) and a sampling rod (4). The connecting sleeve (3) is detachably connected to the outer end of the sealing assembly. The sampling rod (4) is slidably connected to the connecting sleeve (3). A sampling pipe (5) is connected to the connecting sleeve (3); The sealing assembly includes a first sealing pipe (6) and a second sealing pipe (7) sequentially connected to the branch pipe (2). A sealing ball (8) is arranged inside the first sealing pipe (6). An elastic sealing member is arranged inside the second sealing pipe (7), and the elastic sealing member contacts the sealing ball (8).

2. The sampling device for natural gas production according to claim 1, characterized in that: An electromagnetic valve (9) is connected to the branch pipe (2). The branch pipe (2) is hermetically connected to the first sealing pipe (6). An elastic retaining piece (10) is arranged inside the first sealing pipe (6). The sealing ball (8) is located between the elastic retaining piece (10) and the elastic sealing member. A connecting pipe (11) is arranged at the outer end of the second sealing pipe (7), and the connecting pipe (11) is detachably connected to the connecting sleeve (3).

3. The sampling device for natural gas production according to claim 1, characterized in that: A first adjustment cavity (12) and a second adjustment cavity (13) are arranged inside the first sealing pipe (6). The first adjustment cavity (12) is adjacent to the branch pipe (2). The diameter of the first adjustment cavity (12) is larger than that of the second adjustment cavity (13). The diameter of the second adjustment cavity (13) is larger than the diameter of the sealing ball (8).

4. A sampling device for natural gas production according to claim 1, characterized in that: The elastic sealing member includes an adjustment rod (14), a support spring (15) and a sealing block (16). The sealing block (16) is in sealing contact with the inner side of the open end of the second sealing pipe (7). One end of the adjustment rod (14) is fixedly connected to the sealing block (16). The other end of the adjustment rod (14) is connected with a push block, and the push block contacts the sealing ball (8). One end of the support spring (15) is fixedly connected to the end of the second sealing pipe (7) connected to the first sealing pipe (6). The other end of the support spring (15) is fixedly connected to the sealing block (16).

5. The sampling device for natural gas production according to claim 1, characterized in that: A sampling opening (17) is arranged at the end of the second sealing pipe (7) away from the first sealing pipe (6). The diameter of the sampling opening (17) is smaller than the inner diameter of the second sealing pipe (7).

6. The sampling device for natural gas production according to claim 1, wherein: The sampling rod (4) is slidably and hermetically connected to the connecting sleeve (3). A handle is connected to the outer end of the sampling rod (4).

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