Natural gas accumulation sampler

Abstract

A natural gas accumulation sampler comprises a gas inlet pipeline, a quantitative sampling assembly, a gas storage bottle and a gas outlet pipeline, the gas inlet pipeline is connected with a natural gas pipeline, gas in the natural gas pipeline flows into the natural gas sampler through the gas inlet pipeline, and the gas outlet pipeline is connected with the quantitative sampling assembly and the gas inlet pipeline through an electromagnetic valve. When the natural gas sampler works, the electromagnetic valve is controlled to control the gas inlet pipeline to be communicated with the gas outlet pipeline or the quantitative sampling assembly, and when the gas inlet pipeline is communicated with the gas outlet pipeline, residual natural gas in the pipeline of the natural gas sampler is emptied through the gas outlet pipeline, so that the residual gas in the pipeline is prevented from being collected into a gas storage bottle; when the gas inlet pipeline is communicated with the quantitative sampling assembly, the quantitative sampling assembly is driven to work through the gas inlet pipeline, and a gas sample in the quantitative sampling assembly is conveyed into the gas storage bottle.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of sampler, concretely relates to a natural gas cumulative sampler. BACKGROUND

[0002] The sampling representative problem is the primary problem that needs to be considered and concerned in the analysis. Through the research on the working principle, sampling method and sampling influencing factors of the cumulative sampling, as well as the comparative analysis of the economic and management advantages of other sampling technologies and the comparison of the cumulative sampling analysis data and the online gas chromatography analysis data, it is shown that the cumulative sampling system has a broad application prospect at the downstream end of the gas pipe network, i.e. the thermal power plant, large heating plant, internal transfer metering station, CNG, LNG and other station sites. At the same time, it can also be applied to the gate station as a verification means for online data, and the sample can be saved to facilitate disputes and arbitration. At present, the sampler is usually used to sample a monitoring point on the natural gas pipe network line, and the gas quality of the point is measured by the sampling sample.

[0003] The utility model discloses a kind of gas cumulative sampling systems, including sampler, sampling container and process pipeline, the sampler is connected with the sampling container and the process pipeline respectively by pipeline, the sampler includes shell, the shell is rectangular cavity, the inside fixed connection of the shell has first cylinder, the first cylinder is cylindrical cavity, the first cylinder is open at one end, the inside sliding of the first cylinder is equipped with second cylinder. The deficiency of the above-mentioned sampling device is that (1) the gas sample volume of each sampling cannot be adjusted;(2) the gas in the front end pipeline of sampling container cannot be discharged, so that each sampling is residual gas in the pipeline, resulting in deviation of sampling result. SUMMARY

[0004] In view of the above shortcomings, the technical problem to be solved by the utility model is to provide a natural gas cumulative sampler, which can adjust the gas volume of each sampling, and ensure that the gas sample of each sampling is consistent with the gas in the natural gas pipeline.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is,

[0006] A natural gas cumulative sampler is connected with a natural gas pipeline, comprising:

[0007] Gas inlet pipeline is used for connecting with natural gas pipeline;

[0008] The quantitative sampling assembly is connected with the air inlet pipeline, and comprises a sampling sleeve, a sampling piston slidingly installed in the sampling sleeve, a sampling driving member for driving the sampling piston to move, and a sampling adjusting member for adjusting the stroke range of the sampling piston, the sampling driving member is connected with the sampling piston, the sampling adjusting member is connected with the sampling driving member, the moving stroke of the sampling driving member is adjusted through the sampling adjusting member, so that the moving stroke of the sampling piston is adjusted, and an air storage cylinder is connected with the output end of the quantitative sampling assembly, and the air storage cylinder is inflated through the quantitative sampling assembly.

[0009] The air outlet pipeline is connected with the quantitative sampling assembly and the air inlet pipeline through the electromagnetic valve, and the air inlet pipeline is communicated with the air outlet pipeline or the quantitative sampling assembly through the electromagnetic valve.

[0010] As a preferred scheme of the utility model, the sampling sleeve comprises a sampling cylinder body and a cylinder body which are communicated with each other, the sampling piston is slidingly installed in the sampling cylinder body, and the sampling driving member is slidingly installed in the cylinder body.

[0011] As a preferred scheme of the utility model, the sampling driving member comprises a driving piston and a connecting rod, the driving piston is slidingly installed in the cylinder body, and the driving piston is connected with the sampling piston through the connecting rod, the air inlet pipeline is connected with the cylinder body, so as to drive the driving piston to move in the cylinder body, and the sampling adjusting member is arranged on one side of the driving piston and used for adjusting the moving stroke of the driving piston.

[0012] As a preferred scheme of the utility model, the air inlet pipeline is arranged on one side of the driving piston, and a return spring is arranged on the other side of the driving piston.

[0013] As a preferred scheme of the utility model, the output end of the quantitative sampling assembly is provided with an air outlet check valve.

[0014] As a preferred scheme of the utility model, the end of the air inlet pipeline is provided with an air inlet assembly, and the air inlet assembly is connected with the electromagnetic valve and the quantitative sampling assembly.

[0015] As a preferred scheme of the utility model, the air inlet assembly comprises an air inlet connector, a filter and a pressure stabilizing valve which are connected in sequence, the electromagnetic valve is connected with the pressure stabilizing valve, and the filter is connected with the quantitative sampling assembly through the sampling check valve.

[0016] As a preferred scheme of the utility model, the air storage cylinder is a piston air storage cylinder, one end of the air storage cylinder is connected with the quantitative sampling assembly, and the other end is connected with the natural gas pipeline through a back pressure pipeline.

[0017] As a preferred scheme of the utility model, the back pressure pipeline is provided with a back pressure valve for controlling the opening and closing of the back pressure pipeline.

[0018] As a preferred scheme of the utility model, the quantitative sampling assembly is connected with the gas storage bottle through the gas storage on-off valve.

[0019] Compared with the prior art, the utility model has the advantages that (1) the residual natural gas in the pipeline of the natural gas sampler is exhausted through the exhaust pipeline, the gas collected by the gas storage bottle each time is consistent with the gas in the natural gas pipeline, and thus the sampling accuracy is improved.

[0020] (2) Compared with the prior art quantitative sampling assembly which cannot adjust the sampling amount, the quantitative sampling assembly is provided with a sampling adjusting piece for adjusting the gas volume sampled each time, so as to meet different sampling requirements of users.

[0021] (3) The natural gas sampler drives the quantitative sampling assembly to store the gas in the gas storage bottle through the gas in the natural gas pipeline, without external gas circuit, and the structure of the natural gas sampler is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the natural gas sampler.

[0023] Figure 2 is a working principle schematic view of the quantitative sampling assembly.

[0024] Figure 3 is a structural schematic view of the natural gas sampler.

[0025] The drawing comprises the following parts: a natural gas pipeline 1, an air inlet pipeline 2, a quantitative sampling assembly 3, a sampling sleeve 3-1, a sampling piston 3-2, a sampling driving piece 3-3, a sampling adjusting piece 3-4, a sampling cylinder body 3-5, a cylinder body 3-6, a driving piston 3-7, a connecting rod 3-8, a reset spring 3-9, an air outlet check valve 3-10, a gas storage on-off valve 3-11, a gas storage bottle 4, an air outlet pipeline 5, an electromagnetic valve 6, an air inlet assembly 7, an air inlet connector 7-1, a filter 7-2, a pressure stabilizing valve 7-3, a sampling check valve 7-4, a back pressure pipeline 8, and a back pressure valve 8-1. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings.

[0027] The natural gas accumulative sampler comprises an inlet pipeline 2, a quantitative sampling assembly 3, a gas storage cylinder 4 and an outlet pipeline 5, wherein the inlet pipeline 2 is connected with a natural gas pipeline 1, the gas in the natural gas pipeline 1 flows into the natural gas sampler through the inlet pipeline 2, the outlet pipeline 5 is connected with the quantitative sampling assembly 3 and the inlet pipeline 2 through an electromagnetic valve 6, when the natural gas sampler works, the electromagnetic valve 6 is controlled to control the communication between the inlet pipeline 2 and the outlet pipeline 5 or the quantitative sampling assembly 3, when the inlet pipeline 2 and the outlet pipeline 5 are communicated, the residual natural gas in the pipeline of the natural gas sampler is exhausted through the outlet pipeline 5, so that the residual gas in the pipeline is prevented from being collected into the gas storage cylinder 4; when the inlet pipeline 2 and the quantitative sampling assembly 3 are communicated, the quantitative sampling assembly 3 is driven to work through the inlet pipeline 2, and the gas sample in the quantitative sampling assembly 3 is transported into the gas storage cylinder 4.

[0028] An inlet assembly 7 is arranged at the end of the inlet pipeline 2, the inlet pipeline 2 is connected with the natural gas pipeline 1 through the inlet assembly 7, and the inlet assembly 7 is connected with the electromagnetic valve 6 and the quantitative sampling assembly 3.

[0029] The inlet assembly 7 comprises an inlet connector 7-1, a filter 7-2 and a pressure stabilizing valve 7-3 connected in sequence, the inlet connector 7-1 is connected with the natural gas pipeline 1 through a pipeline, the filter 7-2 is used for filtering large-particle impurities, liquid hydrocarbon compounds and water in the natural gas, the pressure stabilizing valve 7-3 is connected with the electromagnetic valve 6, the setting of the pressure stabilizing valve 7-3 ensures that the gas pressure for controlling the working gas of the quantitative sampling assembly 3 has good stability, and the filter 7-2 is connected with the quantitative sampling assembly 3 through a sampling check valve 7-4, so that the natural gas only flows from the filter 7-2 to the quantitative sampling assembly 3.

[0030] The electromagnetic valve 6 is a two-position three-way electromagnetic valve, in a normal state, the inlet pipeline 2 and the outlet pipeline 5 are connected through the electromagnetic valve 6, so that the residual gas in the pipeline is exhausted, and the gas in the pipeline is ensured to be consistent with the gas composition in the natural gas pipeline, after the electromagnetic valve 6 is actuated, the inlet pipeline 2 and the quantitative sampling assembly 3 are communicated through the electromagnetic valve 6, so that the gas sample in the quantitative sampling assembly 3 is transported into the gas storage cylinder 4.

[0031] The quantitative sampling assembly 3 comprises a sampling sleeve 3-1, a sampling piston 3-2, a sampling drive 3-3 and a sampling adjusting member 3-4, the sampling piston 3-2 is slidingly installed in the sampling sleeve 3-1, and the gas in the natural gas pipeline 1 is input into the sampling sleeve 3-1 and transported into the gas storage cylinder 4 by sliding the sampling piston 3-2, the sampling drive 3-3 is connected with the sampling piston 3-2 and used to drive the sampling piston 3-2 to move in the sampling sleeve 3-1, and the sampling adjusting member 3-4 is connected with the sampling drive 3-3 and used to adjust the moving stroke of the sampling drive 3-3, so as to adjust the moving stroke of the sampling piston 3-2, change the gas amount input into the sampling sleeve 3-1 each time and change the sampling gas volume each time.

[0032] The sampling sleeve 3-1 comprises a sampling cylinder body 3-5 and a cylinder body 3-6 which are in communication with each other, the sampling piston 3-2 is slidingly installed in the sampling cylinder body 3-5, the sampling drive 3-3 is slidingly installed in the cylinder body 3-6, the gas inlet pipeline 2 is connected with the cylinder body 3-6 through the electromagnetic valve 6, the sampling drive 3-3 is driven to slide in the cylinder body 3-6 by the gas in the gas inlet pipeline 2, the sampling drive 3-3 drives the sampling piston 3-2 to slide due to the connection between the sampling drive 3-3 and the sampling piston 3-2, the sampling adjusting member 3-4 is installed on the cylinder body 3-6, the structure of the sampling adjusting member 3-4 is similar to that of a screw, the length of the sampling adjusting member 3-4 extending into the cylinder body 3-6 is changed, so as to change the sliding stroke of the sampling drive 3-3 in the cylinder body 3-6, further change the moving stroke of the sampling piston 3-2 and change the gas amount input into the sampling sleeve 3-1.

[0033] The sampling drive 3-3 comprises a drive piston 3-7 and a connecting rod 3-8, the drive piston 3-7 is slidingly installed in the cylinder body 3-6 and connected with the sampling piston 3-2 through the connecting rod 3-8, the gas inlet pipeline 2 is connected with the cylinder body 3-6 and drives the drive piston 3-7 to move in the cylinder body 3-6. The sampling adjusting member 3-4 is arranged on one side of the drive piston 3-7 and used to adjust the moving stroke of the drive piston 3-7, the gas inlet pipeline 2 is arranged on the same side of the drive piston 3-7 as the sampling adjusting member 3-4, and a reset spring 3-9 is arranged on the other side of the drive piston 3-7 and abuts against the end face of the cylinder body 3-6, the drive piston 3-7 is driven to reset by the reset spring 3-9, and the gas in the natural gas pipeline 1 is input into the sampling sleeve 3-1 in the process of resetting the drive piston 3-7.

[0034] The output end of the quantitative sampling assembly 3 is provided with an air outlet check valve 3-10, that is, the air outlet check valve 3-10 is arranged between the sampling cylinder body 3-5 and the gas storage cylinder 4, so as to ensure that the sample gas in the sampling cylinder body 3-5 is transported into the gas storage cylinder 4.

[0035] In the embodiment, the gas storage cylinder 4 is a piston gas storage cylinder 4, which can ensure that the gas storage cylinder 4 does not contain gas in the initial state, and further ensure the accuracy of subsequent detection. One end of the gas storage cylinder 4 is connected with the quantitative sampling assembly 3, so as to facilitate the input of the gas in the quantitative sampling assembly 3 into the gas storage cylinder 4. The other end of the gas storage cylinder 4 is connected with the natural gas pipeline 1 through the back pressure pipeline 8. When the gas storage cylinder 4 is installed, the gas storage cylinder 4 is connected first, and the residual air in the gas storage cylinder 4 can be exhausted through the back pressure pipeline 8.

[0036] The back pressure pipeline 8 is provided with a back pressure valve 8-1 for controlling the opening and closing of the back pressure pipeline 8. A gas storage on-off valve 3-11 is arranged between the quantitative sampling assembly 3 and the gas storage cylinder 4. After the gas storage cylinder 4 collects gas, the back pressure valve 8-1 and the gas storage on-off valve 3-11 are closed, and then the gas storage cylinder 4 is removed from the natural gas sampler, so that the staff can analyze the gas quality in the gas storage cylinder 4 through external equipment. Preferably, the gas storage on-off valve 3-11 is arranged between the air outlet check valve 3-10 and the gas storage cylinder 4.

[0037] The working principle of the natural gas sampler is as follows:

[0038] (1) In the normal state, the electromagnetic valve 6 connects the gas inlet pipeline 2 and the gas outlet pipeline 5, so that the gas in the gas inlet pipeline 2 and the gas outlet pipeline 5 is consistent with the gas in the natural gas pipeline 1;

[0039] (2) The electromagnetic valve 6 works to connect the gas inlet pipeline 2 and the cylinder barrel 3-6, and drives the sampling driving part 3-3 to move towards the bottom of the cylinder barrel 3-6, thereby driving the sampling piston 3-2 to transport the gas in the sampling sleeve 3-1 into the gas storage cylinder 4;

[0040] (3) The electromagnetic valve 6 resets, the gas inlet pipeline 2 and the gas outlet pipeline 5 are connected, and the sampling driving part 3-3 moves towards the top of the cylinder barrel 3-6 under the action of the reset spring 3-9, thereby driving the sampling piston 3-2 to move towards the sampling piston 3-2, so that the gas in the natural gas pipeline 1 is input into the sampling sleeve 3-1.

[0041] (4) When it is necessary to adjust the gas volume of each sampling, the sampling adjusting part 3-4 is rotated to change the length of the sampling adjusting part 3-4 extending into the cylinder barrel 3-6, so as to change the movement of the sampling piston 3-2 towards the sampling piston 3-2, thereby changing the amount of gas input into the sampling sleeve 3-1.

[0042] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0043] Although the terms corresponding to the reference signs in the drawings are used more frequently herein, the possibility of using other terms is not excluded; the use of these terms is merely for the convenience of describing and explaining the essence of the application; any kind of additional limitation by interpreting them is contrary to the spirit of the application.

Claims

1. A natural gas accumulation sampler, connected with a natural gas pipeline (1), characterized in that, The utility model relates to a kind of natural gas sampling device, including: Intake pipeline (2) is used to connect with natural gas pipeline (1); Quantitative sampling assembly (3) is connected with intake pipeline (2), and the quantitative sampling assembly (3) includes sampling sleeve (3-1), sampling piston (3-2) slidingly installed in sampling sleeve (3-1), sampling drive (3-3) for driving sampling piston (3-2) to move and sampling adjustment piece (3-4) for adjusting the stroke range of sampling piston (3-2), sampling drive (3-3) is connected with sampling piston (3-2), sampling adjustment piece (3-4) is connected with sampling drive (3-3), the travel of sampling drive (3-3) is adjusted by sampling adjustment piece (3-4), so as to adjust the travel of sampling piston (3-2), the output end of the quantitative sampling assembly (3) is connected with gas storage cylinder (4), and gas storage cylinder (4) is filled by quantitative sampling assembly (3); Gas outlet pipeline (5) is connected with quantitative sampling assembly (3), intake pipeline (2) through electromagnetic valve (6), and intake pipeline (2) is communicated with gas outlet pipeline (5) or quantitative sampling assembly (3) through electromagnetic valve (6).

2. A natural gas accumulation sampler according to claim 1, wherein The sampling sleeve (3-1) includes sampling cylinder body (3-5) and cylinder barrel (3-6) which are communicated with each other, the sampling piston (3-2) is slidingly installed in the sampling cylinder body (3-5), and the sampling drive (3-3) is slidingly installed in the cylinder barrel (3-6), and the sampling adjustment piece (3-4) is installed on the cylinder barrel (3-6).

3. A natural gas accumulation sampler according to claim 2, wherein, The sampling drive (3-3) includes a drive piston (3-7) and a connecting rod (3-8), the drive piston (3-7) is slidingly installed in the cylinder barrel (3-6), and the drive piston (3-7) is connected with the sampling piston (3-2) through the connecting rod (3-8), the intake pipeline (2) is connected with the cylinder barrel (3-6), to drive the drive piston (3-7) to move in the cylinder barrel (3-6), and the sampling adjustment piece (3-4) is arranged on one side of the drive piston (3-7) to adjust the travel of the drive piston (3-7).

4. A natural gas accumulation sampler according to claim 3, wherein The intake pipeline (2) is arranged on one side of the drive piston (3-7), and the other side of the drive piston (3-7) is provided with a return spring (3-9).

5. A natural gas accumulation sampler according to claim 1, wherein The output end of the quantitative sampling assembly (3) is provided with a gas outlet check valve (3-10).

6. A natural gas accumulation sampler according to claim 1, wherein The end of the intake pipeline (2) is provided with an intake assembly (7), and the intake assembly (7) is connected with the electromagnetic valve (6) and the quantitative sampling assembly (3) respectively.

7. A natural gas accumulation sampler according to claim 6, wherein The intake assembly (7) includes an intake connector (7-1), a filter (7-2) and a pressure stabilizing valve (7-3) connected in sequence, the electromagnetic valve (6) is connected with the pressure stabilizing valve (7-3), and the filter (7-2) is connected with the quantitative sampling assembly (3) through a sampling check valve (7-4).

8. A natural gas accumulation sampler according to claim 1, wherein The gas storage cylinder (4) is a piston gas storage cylinder (4), one end of the gas storage cylinder (4) is connected with the quantitative sampling assembly (3), and the other end is connected with the natural gas pipeline (1) through a back pressure pipeline (8).

9. A natural gas accumulation sampler according to claim 8, wherein, The back pressure pipeline (8) is provided with a back pressure valve (8-1) for controlling the opening and closing of the back pressure pipeline (8).

10. A natural gas accumulation sampler according to claim 1, wherein, The quantitative sampling assembly (3) is connected with the gas storage cylinder (4) through a gas storage on-off valve (3-11).

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