A gas pipeline rapid sampling device and sampling method

Abstract

The present invention relates to the field of gas sampling and detection, and in particular to a gas pipeline rapid sampling device and a sampling method, the sampling device comprising a gas storage bottle and a sampling tee, the gas storage bottle is provided with an inlet and an outlet, the inlet and the outlet are respectively connected to a valve-controlled pipeline, the end of the valve-controlled pipeline away from the gas storage bottle is provided with a quick-plug connector 1, the sampling tee is arranged between a pipeline pressure gauge and a pressure gauge cock, the sampling tee is provided with a quick-plug connector 2, the quick-plug connector 1 and the quick-plug connector 2 can be matched and connected, the sampling device makes little change to the existing gas pipeline, avoiding safety risks in the improvement process, and at the same time, the sampling operation is simple, convenient and fast, minimizing the current situation of empty bottles and too little gas in the sampling process, and because the sampling process does not require the pressure gauge to be disassembled and assembled, the factors causing secondary interference to the gas sample are reduced, overcoming the current situation of excessive impurities and abnormal components in the sampling process.

Description

Technical Field

[0001] The invention relates to the field of gas sampling and detection, and in particular to a gas pipeline rapid sampling device and a sampling method. Background Art

[0002] Natural gas quality is a topic of common concern to both natural gas supply and demand parties. In order to ensure the quality of exported natural gas, gas station staff need to regularly sample and analyze the natural gas in the station and valve room to obtain relevant parameters of the pipeline transportation medium, which are used to guide the modification of corresponding process parameters of the gas production process.

[0003] At present, there are no dedicated natural gas sampling interfaces on the process pipelines of various stations and valve rooms. When performing natural gas sampling operations, the existing equipment on the pipeline is generally dismantled to obtain an opening on the pipeline, and then a sampling container with a connector and a valve is used to connect to the opening on the pipeline. The pressure gauge used for pipeline monitoring is generally dismantled to obtain the opening on the pipeline. In order to ensure safety, the process needs to be shut down before sampling, and the equipment is reset after the sampling is completed. A single sampling process is time-consuming. At the same time, due to the large number of sampling times and the large number of pressure gauge disassembly and assembly times, it will not only affect the normal transportation of natural gas, but also each disassembly and assembly process is prone to safety hazards. In addition, the gas sample is also easily subject to secondary interference, resulting in unqualified test results, affecting the accuracy of the test. Personnel are also required to travel back and forth between the station and the testing agency, consuming a lot of manpower and material resources. According to incomplete statistics, in 102 sampling processes in a certain year, at least 2 empty bottles, 5 gas samples with excessive impurities, 6 abnormal components, and 1 gas volume were unqualified.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problems that the natural gas sampling process on the existing production and transportation pipelines is time-consuming, has safety hazards, and the gas samples obtained are unqualified, which affects the accuracy of detection. Summary of the invention

[0005] The purpose of the present invention is to provide a gas pipeline rapid sampling device and sampling method to address the technical problems that the natural gas sampling process on the existing production and transportation pipeline is time-consuming, has safety hazards, and the gas samples obtained are unqualified, which affects the accuracy of detection.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A gas pipeline rapid sampling device comprises a gas cylinder and a sampling tee, wherein the gas cylinder is provided with an inlet and an outlet, wherein the inlet and the outlet are respectively connected to valve-controlled pipelines, wherein a quick-connect connector 1 is provided at the end of the valve-controlled pipeline away from the gas cylinder, wherein the sampling tee is arranged between a pipeline pressure gauge and a pressure gauge cock, wherein a quick-connect connector 2 is provided on the sampling tee, and the quick-connect connector 1 and the quick-connect connector 2 can be matched and connected.

[0008] A rapid sampling device for a gas pipeline of the present invention increases a dedicated sampling opening for the pipeline by setting a sampling tee between the pipeline pressure gauge and the pressure gauge cock, and makes only minor changes to the existing gas pipeline, thus avoiding safety risks in the improvement process. Meanwhile, a quick plug connector 1 and a quick plug connector 2 are used for quick connection, thereby realizing rapid connection between the gas cylinder and the gas pipeline. The device has a simple structure and is quick and convenient to operate. Sampling can be completed without cutting off the process by controlling the valve at the cock and the valve on the valve-controlled pipeline. The sampling operation is simple, convenient and fast, and the current situation of empty bottles and insufficient gas volume during the sampling process is minimized. Furthermore, since the sampling process does not require disassembly of the pressure gauge, the factors causing secondary interference to the gas sample are reduced, thus overcoming the current situation of excessive impurities and abnormal components during the sampling process.

[0009] As a preferred solution of the present invention, one-way valve cores are respectively arranged in the quick-connect connector 1 and the quick-connect connector 2, and a sliding member for pushing the two one-way valve cores to move is arranged in the quick-connect connector 1, and the sliding member can be sealed with the quick-connect connector 2. The two one-way valve cores are arranged relative to each other, and the two one-way valve cores are pushed to move by the sliding member slidably arranged in the quick-connect connector 1, so as to realize the connection and cutoff control between the gas storage cylinder and the gas pipeline.

[0010] As a preferred solution of the present invention, the valve-controlled pipeline includes a connector assembly and a shut-off valve disposed on the connector assembly, one end of the connector assembly is threadedly connected to the gas cylinder, and the other end is threadedly connected to the quick connector. The threaded connection method can facilitate the preparation and on-site connection and assembly of various components while ensuring the airtightness of the connection, and facilitate the use of the sampling device.

[0011] As a preferred solution of the present invention, the gas cylinder comprises an upper tank body and a lower tank body connected by threads, the inlet is arranged at the top of the upper tank body, and the outlet is arranged at the bottom of the lower tank body. The use of a combined gas cylinder facilitates the flexible on-site assembly of various components, so that the capacity of the gas cylinder can be adjusted according to the different amounts of extracted gas.

[0012] As a preferred solution of the present invention, a guide cylinder is provided in the inlet of the upper tank body, the guide cylinder is threadedly connected to the inner tank, and a connecting hole is provided on the wall of the inner tank. The double-layer gas storage cylinder allows the airflow to enter the gap between the inner tank and the gas storage cylinder after passing through the inner tank, increasing the obstruction to the gas flow, not only slowing down the airflow speed during the sampling process, but also minimizing the solid impurities in the gas sample for analysis.

[0013] As a preferred solution of the present invention, the inlet is internally threadedly connected with a sealing plate, the sealing plate is connected with a coil, the coil is provided with a plurality of exhaust holes, and the coil extends into the inner tank. By providing the coil, the flow path of the gas in the gas cylinder is extended, and the solid impurities in the gas are blocked in the coil during the gas flow process and gradually reduced, which is conducive to improving the quality of the sampled gas and making the gas sample analysis results more accurate.

[0014] As a preferred embodiment of the present invention, a solvent bag for containing saturated salt water is provided in the inner tank. According to actual conditions, the gas sample can be passed through the saturated salt water before being output, and the impurity solvent affecting the gas sample analysis is in the saturated salt water to avoid affecting the gas sample analysis results.

[0015] As a preferred solution of the present invention, an annular body is provided at the outer bottom of the inner tank, an air guide hole is provided on the annular body, a sealing ring is provided at the inner bottom of the lower tank, and the annular body abuts against the sealing ring. The airflow can be output from the outlet only after passing through the inlet, the exhaust hole, the connecting hole, and the air guide hole in sequence, extending the airflow route and avoiding existing defects such as empty bottles and more impurities in the gas sample.

[0016] A method for rapid sampling of a gas pipeline, using the sampling device as described above, and before the first sampling, installing a sampling tee between the pipeline pressure gauge and the cock, installing a quick-connect connector 2 on the sampling tee, and providing a safety cap on the quick-connect connector 2, and specifically including the following steps during sampling: Step 1: After checking and confirming that the shut-off valves of the two valve-controlled pipelines on the gas storage cylinder are both in a closed state, remove the safety cap on the quick-connect connector 1 on the gas storage cylinder, remove the safety cap on the quick-connect connector 2 on the sampling tee, and Quick-plug connector 1 and quick-plug connector 2 are plugged in for connection; Step 2: Open the shut-off valve on the valve-controlled pipeline at the outlet, then open the shut-off valve on the valve-controlled pipeline at the inlet, and then open the shut-off valve at the pressure gauge cock to allow natural gas to enter the gas storage cylinder, and start timing synchronously; Step 3: After the timing ends, close the shut-off valve on the valve-controlled pipeline at the outlet, then close the shut-off valve at the pressure gauge cock, and then close the shut-off valve on the valve-controlled pipeline at the inlet; Step 4: Separate quick-plug connector 1 and quick-plug connector 2, restore the safety helmet setting, and complete sampling.

[0017] A rapid gas pipeline sampling method of the present invention provides a convenient conversion interface for gas pipeline sampling by adding a sampling opening on the gas pipeline through extremely simple operation, which facilitates the rapid sampling process. At the same time, sampling only requires connection and disconnection of quick-plug connector 1 and quick-plug connector 2. The operation process is simple and quick, and secondary contamination of the gas sample during the sampling process is avoided, thereby ensuring the stability and accuracy of the gas sample. The sampling method is simple, takes less time, and has high sampling accuracy.

[0018] As a preferred solution of the present invention, a pre-step is provided before step 1: separating the upper tank body and the lower tank body, installing the inner tank containing the solvent bag into the upper tank body, causing the coil to crush the solvent bag, and then reconnecting the upper tank body and the lower tank body. This allows the solvent bag to be selectively provided according to actual conditions, and enables comparison of sampling results.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of a gas pipeline rapid sampling device of the present invention are:

[0020] 1. By setting a sampling tee between the pipeline pressure gauge and the pressure gauge cock, a dedicated sampling opening is added to the pipeline, which makes little change to the existing gas pipeline and avoids safety risks in the improvement process;

[0021] 2. Use quick-connect connector 1 and quick-connect connector 2 for quick connection, so as to realize the quick connection between the gas cylinder and the gas pipeline. It has a simple structure and is quick and easy to operate. It only needs to control the valve at the cock and the valve on the valve-controlled pipeline to complete the sampling without cutting off the process. The sampling operation is simple, convenient and fast, which minimizes the current situation of empty bottles and insufficient gas volume during the sampling process.

[0022] 3. Since the pressure gauge does not need to be disassembled during the sampling process, the factors causing secondary interference to the gas sample are reduced, and the current situation of excessive impurities and abnormal components in the sampling process is overcome.

[0023] The beneficial effects of a gas pipeline rapid sampling method of the present invention are:

[0024] 1. By adding a sampling opening on the gas pipeline through extremely simple operations, a convenient transfer interface is provided for gas pipeline sampling, which facilitates the rapid sampling process;

[0025] 2. When sampling, you only need to connect and disconnect the quick-plug connector 1 and the quick-plug connector 2. The operation process is simple and quick, and it avoids the secondary contamination of the gas sample during the sampling process, ensuring the stability and accuracy of the gas sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model is a structural schematic diagram of a gas pipeline rapid sampling device of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the quick-connect connector 1 and the quick-connect connector 2 in the present invention.

[0028] Figure 3 It is a schematic diagram of the internal structure of the gas storage cylinder described in Example 2.

[0029] Figure 4 It is a structural schematic diagram of a gas pipeline rapid sampling device of Example 4.

[0030] Figure 5 It is a schematic diagram of an implementation of a gas pipeline rapid sampling device of the present invention.

[0031] Numbers in the figure: 1-gas cylinder, 11-inlet, 12-outlet, 13-upper tank body, 14-lower tank body, 15-sealing ring, 16-guide cylinder, 2-sampling tee, 3-valve-controlled pipeline, 31-connector assembly, 32-shut-off valve, 33-adapter, 4-quick plug connector 1, 41-one-way valve core, 42-sliding part, 421-column, 422-channel, 423-through hole, 424-convex ridge, 43-spring, 5-pressure gauge cock, 6-quick plug connector 2, 7-sealing plate, 71-coil, 72-exhaust hole, 8-inner tank, 81-connecting hole, 82-annular body, 83-gas guide hole, 9-solvent bag, 10-pipeline, 20-pressure gauge. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Example 1

[0035] like Figure 1-Figure 5 As shown, a gas pipeline rapid sampling device includes a gas cylinder 1, the top of the gas cylinder 1 is set as an inlet 11, and the bottom is set as an outlet 12, the inlet 11 and the outlet 12 are respectively connected to a valve-controlled pipeline 3, and the end of the valve-controlled pipeline 3 away from the gas cylinder 1 is provided with a quick-plug connector 4, and also includes a sampling tee 2, the sampling tee 2 is arranged between the pressure gauge 20 of the pipeline 10 and the pressure gauge cock 5, and the sampling tee 2 is provided with a quick-plug connector 6, the quick-plug connector 4 and the quick-plug connector 26 can be connected in a cooperative manner, and when in a standby state, the quick-plug connector 4 and the quick-plug connector 26 are respectively equipped with safety caps for sealing.

[0036] In this embodiment, a gas pipeline quick sampling device is provided. Each of the valve-controlled pipelines 3 includes a connector assembly 31 and a shutoff valve 32 arranged on the connector assembly 31. The on-off control of the valve-controlled pipeline 3 can be realized by controlling the switch state of the shutoff valve 32. The quick-connect connector 1 4 and the quick-connect connector 2 6 are quick-connect connectors that can be plugged in and connected, and can realize the quick connection and separation between the sampling device and the pipeline 10. The quick-connect connector 1 4 and the quick-connect connector 2 6 are equipped with a safety cap with conventional threaded connection. The structure is simple, and the sampling operation is simple, convenient and fast. Sampling can be completed without cutting off the process by simply controlling the valve at the cock and the valve on the valve-controlled pipeline 3, which greatly reduces the time required for the sampling process. In the sampling process, the inlet 11 and the outlet 12 are both in a conducting state, so that the airflow sampled by the sampling device is the airflow flowing through the gas storage bottle 1, which minimizes the current situation of empty bottles and insufficient gas volume during the sampling process, and avoids secondary contamination of the gas sample. According to statistics, the improved sampling time is shortened to 4 minutes, the sampling success rate is 100%, and the sampling qualification rate is 100%.

[0037] Specifically, in this embodiment, before sampling, the pipeline 10 is modified, a sampling tee 2 is added between the pressure gauge 20 and the pressure gauge cock 5 of the pipeline 10, a quick-connect connector 6 is provided on the sampling tee 2, the top of the sampling tee 2 is threadedly connected to the pressure gauge 20, the bottom is threadedly connected to the pressure gauge cock 5, and an interface is provided on the side wall to be threadedly connected to the quick-connect connector 6. The modification of the existing gas pipeline 10 is relatively small, avoiding safety risks in the improvement process, and because the pressure gauge 20 does not need to be disassembled during the sampling process, the factors causing secondary interference to the gas sample are reduced, and the problems of excessive impurities and abnormal components in the sampling process are overcome. In the present situation, when sampling, the shut-off valves 32 on the inlet 11 and the outlet 12 are opened, so that the inlet 11 and the outlet 12 are both in a conducting state, and a flowing airflow is formed in the gas cylinder 1. When it is necessary to end the sampling, the shut-off valve 32 at the outlet 12 is closed, and then the shut-off valve at the inlet 11 is closed, so that the gas cylinder 1 can be quickly filled with a gas volume that meets the detection requirements. When it is necessary to export the gas sample in the gas cylinder 1, it is only necessary to connect the quick-insert connector 1 4 at the outlet 12 with the quick-insert connector 2 6 set on the detection device, so that the airflow enters the detection device for detection. The operation is convenient and it is not easy to cause secondary contamination of the gas sample.

[0038] Preferably, the connector assembly 31 is a two-way pipe connector assembly, one end of which is threadedly connected to the gas cylinder, and the other end is threadedly connected to the quick connector 4. A shut-off valve 32 is provided in the middle to connect the quick connector 4 and the gas cylinder 1, and also to increase the distance between the quick connector 4 and the gas cylinder 1, so as to increase the distance between the gas cylinder 1 and the pipeline 10 when the quick connector 4 is connected to the quick connector 2 6 on the sampling tee 2, thereby avoiding inconvenience in sampling operation caused by the gas cylinder 1 and the pipeline 10 being too close.

[0039] Specifically, the joint assembly 31 includes a two-way adapter 33 arranged at the gas cylinder inlet 11, the bottom of the two-way adapter 33 is threadedly connected to the gas cylinder 1 inlet 11, the top is provided with a shut-off valve 32, and the side wall is provided with an external threaded connection section, and the external threaded connection section is connected to an adapter 33 composed of a connector through a union nut, and the connector 33 is provided with an internal threaded hole for adapting to the quick-connect connector 1 4, and an adapter 33 is also correspondingly arranged between the sampling tee 2 and the quick-connect connector 2 6, so that the mutual threaded connection of multiple components facilitates the connection and assembly of each component, and the structure is simple. It can provide a safe, fast, and long-life connection and assembly structure for special working conditions such as stations while ensuring the air tightness of the connection, thereby facilitating the use of the sampling device.

[0040] Preferably, the quick-insert connector 1 4 and the quick-insert connector 2 6 are respectively provided with a one-way valve core 41, and the quick-insert connector 1 4 is provided with a sliding member 42 for pushing the two one-way valve cores 41 to move, and the sliding member 42 can be sealed with the quick-insert connector 2 6. Figure 2 As shown, the quick-connect connector 1 4 and the quick-connect connector 2 6 of this embodiment both include a housing capable of realizing quick connection in terms of external structure, a flow channel for airflow passing through is arranged in the housing, a one-way valve core 41 is arranged in the housing, the flow channel is adjusted in inner diameter according to the setting position of the one-way valve core 41, a spring 43 is arranged in the one-way valve core 41, the one-way valve core 41 in the quick-connect connector 1 4 and the quick-connect connector 2 6 is installed in opposite directions and is arranged relative to each other, a sliding member 42 is slidably arranged in the quick-connect connector 1 4, so that the quick-connect connector 1 When the plug connector 1 4 is not connected to the quick connector 2 6, the spring 43 in the quick connector 1 4 pushes the one-way valve core 41 to fit and seal with the shell, and pushes one end of the sliding member 42 to move out of the shell. The spring 43 in the quick connector 2 6 pushes the valve core 41 to fit and seal with the shell. When the quick connector 1 4 is connected to the quick connector 2 6, the sliding member 42 pushes the two one-way valve cores 41 to move, so that the flow channels in the quick connector 1 4 and the quick connector 2 6 are connected, thereby realizing the connection and cutoff control of the gas storage cylinder 1 and the gas pipeline 10.

[0041] Specifically, the sliding member 42 includes a column 421, a channel 422 is arranged in the column 421 along the length direction, a through hole 423 connected to the channel 422 is arranged on the side wall close to the end face, and a convex ridge 424 adapted to the cavity in the shell of the quick-plug connector 4 is arranged on the column 421, and the sliding member 42 is confined in the quick-plug connector 4 by the convex ridge 424.

[0042] Preferably, the present embodiment is further provided with a safety helmet for closing the openings of quick-connect connector 1 4 and quick-connect connector 2 6 to avoid air leakage when the quick-connect connector fails. The safety helmet can select the sealing structure of the prior art, or can adopt the quick-connect connector 1 4 and quick-connect connector 2 6 without the sliding part, so as to realize the quick-connect sealing connection between quick-connect connector 1 4 and quick-connect connector 2 6, and realize the separate sealing of quick-connect connector 1 4 or quick-connect connector 2 6 when they are in the ready-to-use state.

[0043] Example 2

[0044] like Figure 3 As shown, a gas pipeline rapid sampling device of this embodiment has the same structure as that of Embodiment 1, except that: the gas storage cylinder 1 includes an upper tank body 13 and a lower tank body 14 which are threadedly connected, the inlet 11 is arranged at the top of the upper tank body 13, and the outlet 12 is arranged at the bottom of the lower tank body 14.

[0045] A gas pipeline rapid sampling device of the present embodiment adopts a combined gas storage cylinder. Due to the threaded connection structure of the upper tank body 13 and the lower tank body 14, it is convenient for flexible on-site assembly of various components, so that according to the different extracted gas volumes, the overall capacity of the gas storage cylinder can be easily adjusted by selecting the lower tank body 14 with the same connection thread and different internal capacity.

[0046] Example 3

[0047] like Figure 3 As shown, a gas pipeline rapid sampling device of this embodiment has the same structure as that of embodiment 2, except that: the inlet 11 is internally threadedly connected to a sealing plate 7, a coil 71 is connected to the sealing plate 7, a plurality of exhaust holes 72 are provided on the coil 71, and the exhaust holes 72 are provided on the side wall of the coil 71.

[0048] A gas pipeline rapid sampling device of the present embodiment extends the flow path of the gas in the gas storage cylinder 1 by setting a coil 71. Solid impurities in the gas are blocked in the coil 71 during the gas flow and gradually reduced, which is beneficial to improving the quality of the sampled gas and making the gas sample analysis results more accurate.

[0049] Specifically, the top opening of the coil 71 is connected to the internal flow channel of the joint assembly 31. The coil 71 has a plurality of spiral pipe sections. Exhaust holes 72 are arranged on the side wall of the coil 71 facing the inner wall of the gas cylinder 1, so that the airflow output from the coil 71 hits the inner wall of the gas cylinder 1, slowing down the flow speed of the airflow, dispersing impurities in the airflow, and allowing more airflow to be retained in the gas cylinder 1, so that the gas cylinder 1 can be filled with a gas volume that meets the detection requirements in a shorter time, avoiding excessive gas waste during the sampling process, and reducing the sampling time.

[0050] Example 4

[0051] like Figure 1-Figure 5 As shown, a gas pipeline rapid sampling device of this embodiment has the same structure as that of embodiment 3, except that: a guide cylinder 16 is provided in the inlet 11 of the upper tank body 13, and the guide cylinder 16 is threadedly connected to the inner tank 8, a connecting hole 81 is provided on the wall of the inner tank 8, the coil 71 extends into the inner tank 8, an annular body 82 is provided at the outer bottom of the inner tank 8, and an air guide hole 83 is provided on the annular body 82, and a sealing ring 15 is provided at the inner bottom of the lower tank body 14, and the annular body 82 abuts against the sealing ring 15.

[0052] A gas pipeline rapid sampling device of the present embodiment is a gas cylinder 1 with a double-layer structure formed by an inner tank 8 arranged in the gas cylinder. The gas flow entering from the inlet 11 needs to pass through the inlet 11, the exhaust hole 72, the connecting hole 81, and the gas guide hole 83 in sequence before it can be output from the outlet 12, thereby extending the gas flow route. The inner tank 8 can also further increase the obstruction effect on the gas flow, slow down the gas flow speed during the sampling process, and reduce the time for the gas cylinder to be filled with gas that meets the detection volume. It can also minimize the solid impurities in the gas sample for analysis, avoid existing defects such as empty bottles and more impurities in the gas sample, and also improve the qualified rate of the gas sample.

[0053] Specifically, the inner tank 8 is connected to the guide cylinder 16 arranged at the top of the upper tank body 13 by a threaded connection. The connection structure is simple and the connection process is convenient. The inner tank 8 can be selectively installed according to actual conditions to make the sampling process adapt to actual sampling needs. The sealing ring 15 is an annular rubber ring embedded in the bottom of the inner side of the lower tank body 14, which can be deformed during the abutment with the annular body 82 to achieve sealing.

[0054] Preferably, a solvent bag 9 for containing saturated salt water is provided in the inner tank 8. The solvent bag 9 can be opened according to actual conditions, so that the gas sample enters the inner tank 8, is washed with saturated salt water and then output, and the impurity solvent affecting the gas sample analysis is in the saturated salt water, so that the gas sample composition can be obtained more accurately, and the impurities can be prevented from affecting the gas sample analysis results.

[0055] Specifically, in this embodiment, after placing the solvent bag 9 in the inner tank, a sharp cutter is provided at the bottom of the coil 71, so that during the installation of the inner tank, the solvent bag 9 can be automatically opened, allowing the coil to enter the solvent bag 9. During the airflow filling process, the airflow passes through the saturated salt water, is output from the opening cut by the cutter, enters the inner tank 8, and then is output from the gap between the inner and outer tanks.

[0056] Example 5

[0057] A method for rapid sampling of gas pipelines, using Figure 1-Figure 5The sampling device shown in the figure, and before the first sampling, a sampling tee 2 is installed between the pressure gauge 20 of the pipeline 10 and the pressure gauge cock 5, and a quick-connect connector 2 6 is installed on the sampling tee 2, and a safety cap is provided on the quick-connect connector 2 6. The sampling specifically includes the following steps: Step 1: After checking and confirming that the shut-off valves 32 of the two valve-controlled pipelines 3 on the gas storage cylinder 1 are both in the closed state, remove the safety cap and plug the quick-connect connector 1 4 and the quick-connect connector 2 6 into a plug-in connection; Step 2: Open the valve at the outlet 12 Step three: after the timing is over, close the shut-off valve 32 on the valve-controlled pipeline 3 at the outlet 12, close the shut-off valve 32 at the pressure gauge cock 5, and then close the shut-off valve 32 on the valve-controlled pipeline 3 at the inlet 11; Step four: separate the quick-connect connector 1 4 and the quick-connect connector 2 6, restore the safety helmet setting, and complete the sampling.

[0058] A quick gas pipeline sampling method of the present embodiment provides a convenient dedicated interface for sampling the gas pipeline 10 by adding a sampling opening on the gas pipeline 10 through extremely simple operation, which facilitates the rapid sampling process. At the same time, sampling only requires connection and disconnection of quick-plug connector 1 4 and quick-plug connector 2 6, and the operation process is simple and quick, and avoids secondary contamination of the gas sample during the sampling process, thereby ensuring the stability and accuracy of the gas sample.

[0059] Preferably, a pre-step is provided before step 1: separating the upper tank body 13 and the lower tank body 14, installing the inner tank 8 containing the solvent bag 9 into the upper tank body 13, causing the coil 71 to crush the solvent bag 9, and then restoring the connection between the upper tank body 13 and the lower tank body 14. The solvent bag 9 can be selectively provided according to actual conditions to achieve comparison of sampling results. According to actual conditions, a structure in which a raised cutter is provided at the bottom of the coil 71, so that during the installation of the inner tank 8, the coil 71 cuts the solvent bag 9 and enters the solvent bag 9, so that the gas sample needs to pass through the saturated salt water in the solvent bag 9 after being output from the coil 71 before entering the gap between the inner tank 8 and the outer tank from the connecting hole 81 on the upper side of the inner tank 8, and is output from the air guide hole 83, so that the output gas sample has been pre-processed, and impurities interfering with the detection results are removed during the sampling process, thereby reducing the detection time and improving the detection accuracy.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas pipeline rapid sampling device, characterized in that: The invention comprises a gas storage cylinder (1) and a sampling tee (2), wherein the gas storage cylinder (1) is provided with an inlet (11) and an outlet (12), wherein the inlet (11) and the outlet (12) are respectively connected to a valve-controlled pipeline (3), wherein the valve-controlled pipeline (3) comprises a joint assembly (31) and a shut-off valve (32) arranged on the joint assembly (31), wherein one end of the joint assembly (31) is threadedly connected to the gas storage cylinder (1), and the other end is threadedly connected to a quick-connect joint (4), wherein the gas storage cylinder (1) is provided with an inlet (11) and an outlet (12), wherein the inlet (11) and the outlet (12) are respectively connected to a valve-controlled pipeline (3), wherein the valve-controlled pipeline (3) comprises a joint assembly (31) and a shut-off valve (32) arranged on the joint assembly (31), wherein one end of the joint assembly (31) is threadedly connected to the gas storage cylinder (1), and the other end of the joint assembly (31) is threadedly connected to a quick-connect joint (4), The end of the valve-controlled pipeline (3) away from the gas storage cylinder (1) is provided with a quick-connection connector 1 (4); the sampling tee (2) is provided between the pipeline pressure gauge (20) and the pressure gauge cock (5); the sampling tee (2) is provided with a quick-connection connector 2 (6); the quick-connection connector 1 (4) and the quick-connection connector 2 (6) can be matched and connected; the gas storage cylinder (1) comprises an upper tank body (13) and a lower tank body (14) which are threadedly connected; the inlet (11) is provided on the upper tank body (13) and the lower tank body (14) The top of the tank body (13), the outlet (12) is arranged at the bottom of the lower tank body (14), a guide cylinder (16) is arranged in the inlet (11) of the upper tank body (13), the guide cylinder (16) is threadedly connected to the inner tank (8), a connecting hole (81) is arranged on the wall of the inner tank (8), the inlet (11) is threadedly connected to a sealing plate (7), the sealing plate (7) is connected to a coil (71), and the coil (71) is provided with a plurality of exhaust holes (72) The coil (71) extends into the inner tank (8), and a solvent bag (9) for containing saturated salt water is provided in the inner tank (8). A sharp cutter is provided at the bottom of the coil (71), so that during the installation of the inner tank (8), the solvent bag (9) can be automatically opened, so that the coil (71) enters the solvent bag (9). During the airflow filling process, after passing through the saturated salt water, the airflow is discharged from the opening cut by the cutter, enters the inner tank (8), and then discharged from the gap between the inner and outer tanks.

2. A gas pipeline rapid sampling device as claimed in claim 1, characterized in that: The first quick-connect connector (4) and the second quick-connect connector (6) are respectively provided with a one-way valve core (41), and the first quick-connect connector (4) is provided with a sliding member (42) for pushing the two one-way valve cores (41) to move, and the sliding member (42) can be sealed and matched with the second quick-connect connector (6).

3. A gas pipeline rapid sampling device as claimed in claim 1, characterized in that: An annular body (82) is provided at the outer bottom of the inner tank (8), and an air guide hole (83) is provided on the annular body (82). A sealing ring (15) is provided at the inner bottom of the lower tank body (14), and the annular body (82) is in abutment with the sealing ring (15).

4. A method for rapid sampling of a gas pipeline, characterized in that: The sampling device according to any one of claims 1 to 3 is used, and the sampling process specifically includes the following steps: Step 1: After checking and confirming that the shut-off valves (32) of the two valve-controlled pipelines (3) on the gas cylinder (1) are both in the closed state, remove the safety cap on the quick-connect connector 1 (4) on the gas cylinder (1), remove the safety cap on the quick-connect connector 2 (6) on the sampling tee (2), and connect the quick-connect connector 1 (4) and the quick-connect connector 2 (6) by plugging; Step 2: Open the cut-off valve (32) on the valve-controlled pipeline (3) at the outlet (12), then open the cut-off valve (32) on the valve-controlled pipeline (3) at the inlet (11), and then open the cut-off valve (32) at the pressure gauge cock (5) to allow natural gas to enter the gas storage cylinder (1), and simultaneously start timing; Step 3: After the timing is over, close the cut-off valve (32) on the valve-controlled pipeline (3) at the outlet (12), then close the cut-off valve (32) at the pressure gauge cock (5), and then close the cut-off valve (32) on the valve-controlled pipeline (3) at the inlet (11); Step 4: Separate quick-connect connector 1 (4) and quick-connect connector 2 (6), restore the safety helmet setting, and complete the sampling.

5. A gas pipeline rapid sampling method as claimed in claim 4, characterized in that: Before step one, a pre-step is provided: separating the upper tank body (13) and the lower tank body (14), installing the inner tank (8) containing the solvent bag (9) into the upper tank body (13), and then restoring the connection between the upper tank body (13) and the lower tank body (14).

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