Gas reservoir type gas storage gas sampling device and use method

Abstract

The invention relates to the field of gas storage sampling devices, and provides a gas reservoir type gas storage gas sampling device and a using method thereof aiming at the characteristics that a gas reservoir type gas storage is large in flow and high in pressure, the gas reservoir type gas storage gas sampling device comprises a gas conveying pipeline, and a mounting flange seat is arranged on the gas conveying pipeline and used for being communicated with the outside; the device further comprises a connecting flange, a fastening device, a primary sampling valve and a sampler; the linkage type fastening device is designed, a plurality of fastening nuts are aligned to a plurality of threaded holes of a mounting flange base, a hand rotating disc is rotated, the hand rotating disc drives a driving body to rotate, a fluted disc of the driving body drives gears of the fastening nuts to rotate, a connecting flange can be fixed to the mounting flange base, operation is easy, tools such as a wrench sleeve are not needed, and the mounting flange is convenient to use. And compared with one-by-one pre-tightening, synchronous installation improves the assembling stability, and then the sealing performance after assembling is improved.

Description

Technical Field

[0001] This invention relates to the field of gas storage sampling devices, specifically a gas sampling device for a gas reservoir and its usage method. Background Technology

[0002] A gas storage facility, meaning a "container" for storing natural gas, generally refers to an underground gas storage facility. Underground gas storage facilities are artificial gas fields or reservoirs formed by re-injecting commercial natural gas transported through long-distance pipelines into underground spaces. Compared to surface tanks and other methods, underground gas storage facilities have the following advantages: large storage capacity, high mobility, and wide peak-shaving range; economical and reasonable, although the construction cost is high, they are durable and have a service life of 30-50 years or longer; and a high safety factor, with safety far exceeding that of surface facilities.

[0003] To detect and analyze the composition and content of gases in gas storage facilities, it is often necessary to periodically and continuously sample the gas from the storage facility. The conventional method is to pre-install valves on the delivery pipeline, and then install the container at the valve flange to open the valve for sampling. Connecting the flange requires installing and tightening nuts one by one, which is time-consuming and labor-intensive. Gas storage facilities are characterized by large flow rates and high pressures. During sampling, there is a working space between the sampling device and the valve, which can lead to gas leakage. In the event of static electricity, accidents can easily occur, which is quite dangerous. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a gas sampling device and its usage method for a gas reservoir-type gas storage facility, thus solving the problem of complex installation of the sampling device.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a gas sampling device for a gas storage tank includes a gas transmission pipeline, wherein a mounting flange seat is provided on the gas transmission pipeline for connecting to the outside world, and further includes a connecting flange, a fastening device, a primary sampling valve and a sampler; The threaded end of the fastening device passes through the connecting flange, and the fastening device and the mounting flange seat are threadedly connected. The primary sampling valve is slidably installed in the connecting flange cavity, and one end of the primary sampling valve is snapped into the sampler; The sampler includes a connecting valve, a sampling cylinder, and a secondary sampling valve. The connecting valve is snapped onto one end of the primary sampling valve. The sampling cylinder is fixedly installed at one end of the connecting valve. The secondary sampling valve is slidably installed inside the cavity of the sampling cylinder. A sealing cap is installed at the end of the sampling cylinder.

[0006] Furthermore, one end of the connecting flange is provided with a protective ring wall, and a sealing cylinder is provided inside the cavity of the protective ring wall. A through hole is opened at the outer end of the sealing cylinder, and the primary sampling valve is slidably connected inside the sealing cylinder, with one end of the primary sampling valve passing through the through hole.

[0007] Furthermore, the fastening device includes a drive body, a hand dial, a fixing ring, a mounting cover, and several fastening nuts. The drive body is rotatably mounted on the outer wall of the sealing cylinder. The hand dial is snapped onto the drive body. The fixing ring is mounted on one end of the drive body to abut against and fix the hand dial. The other end of the drive body rotatably abuts against the connecting flange. The mounting cover is fixed to the end of the protective ring wall. One end of each of the several fastening nuts passes through several threaded holes of the connecting flange, and each of the several fastening nuts is rotatably connected to the other end of the drive body.

[0008] Furthermore, each of the fastening nuts is provided with a gear at one end, and a gear plate is provided on the outer wall of one end of the drive body, with several gears meshing on the gear plate respectively.

[0009] Furthermore, a limiting ring is provided in the middle of the driving body, and the limiting ring abuts against the inner side wall of the mounting cover. A hexagonal platform is provided at one end of the driving body, and the hand dial and the fixing ring are respectively fixed on the hexagonal platform.

[0010] Furthermore, the primary sampling valve includes a sealing seat, a gas sampling plate, a main pressure spring, and an end cap. The sealing seat is snapped into the through hole of the sealing cylinder, the gas sampling plate is slidably connected to the sealing seat, the main pressure spring abuts between the gas sampling plate and the end cap, and the main pressure spring is located inside the sealing cylinder. The end cap is fixed to the port of the sealing cylinder. One end of the gas sampling plate is provided with a gas outlet pipe, and the end of the gas outlet pipe is provided with a snap-fit ​​platform. The connecting valve is snapped onto the snap-fit ​​platform. The gas sampling plate is provided with a main air inlet hole, and the end of the gas outlet pipe located inside the sealing seat is provided with a main exhaust hole.

[0011] Furthermore, a one-way valve is installed inside the connecting valve to prevent gas leakage.

[0012] Furthermore, the secondary sampling valve includes a piston, a gas tube disc, a secondary pressure spring, and a contact nut. One end of the piston is provided with a connecting pipe, and the other end of the piston has a limit groove. A sealing ring is installed on the piston. One end of the gas tube disc is engaged in the limit groove. An exhaust pipe is provided on the gas tube disc. One end of the exhaust pipe extends out of the connecting pipe. The contact nut is fixed to one end of the exhaust pipe. The secondary pressure spring is installed between the end of the connecting pipe and the contact nut. A secondary air inlet is provided on the gas tube disc, and a secondary exhaust outlet is provided at the end of the exhaust pipe located inside the piston.

[0013] Furthermore, a sealing gasket is installed between the connecting flange and the mounting flange.

[0014] The method of using a gas sampling device for a gas reservoir type gas storage facility according to the present invention includes the following steps: Step 1: First, assemble the connecting flange, fastening device, and primary sampling valve; Step 2: Screw several fastening nuts into the threaded holes of the connecting flange in the same direction, and then rotate the drive body onto the outer wall of the sealing cylinder. Step 3: Inside the protective ring wall cavity, adjust the gears of several fastening nuts to mesh with the gear disc on one end of the outer wall of the drive body. Then, press the gear disc end of the drive body inward until it is flush with the connecting flange, and fix the mounting cover to the end of the protective ring wall. Step 4: Install the retaining ring on the outer end of the drive body to abut against the fixed hand dial, and slide the primary sampling valve inside the sealing cylinder of the connecting flange; Step 5: Install the sealing gasket on the end of the connecting flange, then align several fastening nuts with several threaded holes of the mounting flange seat, turn the hand dial, the hand dial drives the drive body to rotate, the gear of the drive body drives the gear of several fastening nuts to rotate, thereby fixing the connecting flange on the mounting flange seat. Step 6: Connect the sampler's connecting valve to the clamping platform of the gas outlet pipe, press the sampler inward to make the gas sampling plate slide into the sealing seat, and connect the main air inlet and the main exhaust port on the gas sampling plate so that the gas in the gas transmission pipeline can be discharged outward through the gas outlet pipe. Step 7: The sampling gas enters the sampling cylinder. When it is necessary to transfer the sample gas in the sampling cylinder, put the exhaust pipe end of the secondary sampling valve into the detection instrument and gently touch the exhaust pipe end to make the gas tube plate slide into the piston. Referring to the principle of step 6, the sample gas can be discharged into the detection instrument.

[0015] The beneficial effects of this invention are: 1. The present invention provides a gas sampling device for a gas reservoir type gas storage facility. By designing a linkage fastening device, several fastening nuts are aligned with several threaded holes of the mounting flange seat. Rotating the hand dial drives the drive body to rotate, and the gear plate of the drive body drives the gears of several fastening nuts to rotate. This not only fixes the connecting flange on the mounting flange seat, but also simplifies the operation and eliminates the need for tools such as wrenches and gloves, making it convenient and labor-saving, improving installation efficiency. Furthermore, synchronous installation improves the stability of the assembly compared to pre-tightening one by one, thereby improving the sealing performance after assembly.

[0016] 2. This invention discloses a gas sampling device and method for a gas reservoir-type gas storage facility. By designing a press-type gas sampling plate, during sampling, the sampler's connecting valve is connected to the clamping platform of the gas outlet pipe. Pressing the sampler inward causes the gas sampling plate to slide into the sealing seat. The main inlet and main outlet holes on the gas sampling plate are connected, allowing gas in the gas pipeline to be discharged from the outlet pipe and enter the sampling cylinder. The advantage of this method compared to valve-type sampling is that it provides instantaneous sampling. Compared to conventional valve-type continuous sampling, the amount of residual or leaked gas during sampling is much smaller. Therefore, this invention solves the problems of gas leakage and potential accidents caused by static electricity that can occur with conventional sampling methods. Attached Figure Description

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the overall structure of the present invention; Figure 3 This is a partial structural breakdown diagram of the present invention. Figure 1 ; Figure 4 This is a partial structural breakdown diagram of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the structure of the driving body of the present invention; Figure 6 This is an exploded view of the overall structure of the primary sampling valve of the present invention; Figure 7 This is an exploded view of the overall structure of the secondary sampling valve of the present invention; Figure 8 This is a partial exploded view of the secondary sampling valve of the present invention; Figure 9 for Figure 7 A magnified view of a section at point A in the middle; The attached diagram lists the components represented by each number as follows: 1. Gas transmission pipeline; 11. Installation flange seat; 2. Connecting flange; 21. Protective ring wall; 22. Sealing cylinder; 221. Through hole; 3. Fastening device; 31. Drive body; 311. Gear disc; 312. Limiting ring; 313. Hexagonal platform; 32. Hand dial; 33. Fixing ring; 34. Mounting cover; 35. Fastening nut; 351. Gear; 4. Primary sampling valve; 41. Sealing seat; 42. Gas sampling plate; 421. Gas outlet pipe; 422. Snap-fit ​​platform; 423. Main air inlet; 424. Main exhaust port; 43. Main compression spring; 44. End cap; 5. Sampler; 51. Connecting valve; 52. Sampling cylinder; 53. Secondary sampling valve; 531. Piston; 532. Gas tube disc; 5321. Exhaust pipe; 5322. Secondary air inlet; 5323. Secondary exhaust port; 533. Secondary compression spring; 534. Contact nut; 535. Connecting pipe; 536. Limiting groove; 54. Sealing cap; 55. One-way valve; 56. Sealing ring; 6. Sealing gaskets. Detailed Implementation

[0018] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0019] The present invention provides the following preferred embodiments: refer to Figure 1 , Figure 2 As shown, a gas sampling device for a gas reservoir includes a gas transmission pipeline 1, on which a mounting flange seat 11 is provided for connecting to the outside. The device is characterized by further including a connecting flange 2, a fastening device 3, a primary sampling valve 4, and a sampler 5. The threaded end of the fastening device 3 passes through the connecting flange 2, and the fastening device 3 and the mounting flange seat 11 are threadedly connected. The primary sampling valve 4 is slidably installed in the cavity of the connecting flange 2, and one end of the primary sampling valve 4 is snapped into the sampler 5; The sampler 5 includes a connecting valve 51, a sampling cylinder 52, and a secondary sampling valve 53. The connecting valve 51 is snapped onto one end of the primary sampling valve 4. The sampling cylinder 52 is fixedly installed on one end of the connecting valve 51. The secondary sampling valve 53 is slidably installed inside the cavity of the sampling cylinder 52. A sealing cap 54 is installed at the end of the sampling cylinder 52.

[0020] A sealing gasket 6 is installed between the connecting flange 2 and the mounting flange. The sealing gasket 6 provides a sealing effect. The sealing gasket 6 has corresponding openings for several fastening nuts 35 to pass through, and the center of the sealing gasket 6 also has an opening for gas to pass through. When the sealing effect of the sealing gasket 6 deteriorates due to weathering or corrosion, the hand dial 32 is rotated in the opposite direction to separate the connecting flange 2 and the mounting flange seat 11. The failed sealing gasket 6 is removed, replaced with a new sealing gasket 6, and then the connecting flange 2 is fixed to the mounting flange seat 11.

[0021] In this embodiment, as Figure 3 , Figure 4As shown, one end of the connecting flange 2 is provided with a protective ring wall 21, and a sealing cylinder 22 is provided inside the cavity of the protective ring wall 21. The outer end of the sealing cylinder 22 has a through hole 221. The primary sampling valve 4 is slidably connected inside the sealing cylinder 22, and one end of the primary sampling valve 4 passes through the through hole 221. The connecting flange 2 is a one-piece molded part, preferably produced by casting. In order to ensure that the primary sampling valve 4 can slide smoothly inside the sealing cylinder 22, an appropriate amount of lubricating oil can be applied to the through hole 221 of the sealing cylinder 22 during specific installation.

[0022] The fastening device 3 includes a drive body 31, a hand dial 32, a fixing ring 33, a mounting cover 34, and several fastening nuts 35. The drive body 31 is rotatably mounted on the outer wall of the sealing cylinder 22. The hand dial 32 is snapped onto the drive body 31. The fixing ring 33 is mounted on one end of the drive body 31 to abut against and fix the hand dial 32. The other end of the drive body 31 is rotatably in contact with the connecting flange 2. The mounting cover 34 is fixed to the end of the protective ring wall 21. One end of each of the several fastening nuts 35 passes through several threaded holes in the connecting flange 2, and each of the several fastening nuts 35 is rotatably connected to the other end of the drive body 31. When assembling the connecting flange 2, fastening device 3, and primary sampling valve 4, firstly, screw several fastening nuts 35 into the threaded holes of the connecting flange 2 in the same direction. Then, rotate the drive body 31 onto the outer wall of the sealing cylinder 22. In the cavity of the protective ring wall 21, adjust the gears 351 of several fastening nuts 35 to mesh with the gear disc 311 on one end of the outer wall of the drive body 31. Then, press the end of the gear disc 311 of the drive body 31 inward to fit tightly against the connecting flange 2. Fix the mounting cover 34 to the end of the protective ring wall 21. Then, install the fixing ring 33 on the outer end of the drive body 31 to abut against the fixing hand dial 32. Finally, slidably install the primary sampling valve 4 into the sealing cylinder 22 of the connecting flange 2.

[0023] In this embodiment, as Figure 5 As shown, each of the fastening nuts 35 has a gear 351 at one end, and a gear disc 311 is provided on the outer wall of one end of the drive body 31. Several gears 351 mesh with the gear disc 311 respectively. The sealing gasket 6 is installed at the end of the connecting flange 2. Then, several fastening nuts 35 are aligned with several threaded holes of the mounting flange seat 11. The hand dial 32 is rotated, which drives the drive body 31 to rotate. The gear disc 311 of the drive body 31 drives the gears 351 of the fastening nuts 35 to rotate, thereby fixing the connecting flange 2 on the mounting flange seat 11.

[0024] A limiting ring 312 is provided in the middle of the driving body 31. The limiting ring 312 abuts against the inner wall of the mounting cover 34. A hexagonal platform 313 is provided at one end of the driving body 31. The hand turntable 32 and the fixing ring 33 are respectively fixed on the hexagonal platform 313.

[0025] refer to Figure 6 As shown, the primary sampling valve 4 includes a sealing seat 41, a gas sampling plate 42, a main pressure spring 43, and an end cap 44. The sealing seat 41 is snapped into the through hole 221 of the sealing cylinder 22. The gas sampling plate 42 is slidably connected to the sealing seat 41. The main pressure spring 43 abuts between the gas sampling plate 42 and the end cap 44, and the main pressure spring 43 is located inside the sealing cylinder 22. The end cap 44 is fixed to the port of the sealing cylinder 22. One end of the gas sampling plate 42 is provided with a gas outlet pipe 421, and the end of the gas outlet pipe 421 is provided with a snap-fit ​​platform 422. The connecting valve 51 is snapped onto the snap-fit ​​platform 422. The gas sampling plate 42 is provided with a main air inlet 423, and the end of the gas outlet pipe 421 located inside the sealing seat 41 is provided with a main exhaust port 424. During sampling, the connecting valve 51 of the sampler 5 is connected to the clamping platform 422 of the gas outlet pipe 421. The sampler 5 is pressed inward so that the gas sampling plate 42 slides into the sealing seat 41. The main air inlet 423 and the main exhaust 424 on the gas sampling plate 42 are connected so that the gas in the gas transmission pipeline 1 can be discharged outward through the gas outlet pipe 421.

[0026] Reference Figures 7 to 9 The gas sampling device shown is for a gas reservoir type gas storage facility. The connecting valve 51 is equipped with a one-way valve 55 to prevent gas leakage.

[0027] The secondary sampling valve 53 includes a piston 531, an air tube disc 532, a secondary pressure spring 533, and a contact nut 534. One end of the piston 531 is provided with a connecting pipe 535, and the other end of the piston 531 is provided with a limiting groove 536. A sealing ring 56 is installed on the piston 531. One end of the air tube disc 532 is engaged in the limiting groove 536. An exhaust pipe 5321 is provided on the air tube disc 532. One end of the exhaust pipe 5321 extends out of the connecting pipe 535. The contact nut 534 is fixed to one end of the exhaust pipe 5321. The secondary pressure spring 533 is installed between the end of the connecting pipe 535 and the contact nut 534. A secondary air inlet 5322 is provided on the air tube disc 532. A secondary exhaust port 5322 is provided at the end of the exhaust pipe 5321 located inside the piston 531. After the sampling gas enters the sampling cylinder 52, when it is necessary to transfer the sample gas in the sampling cylinder 52, the exhaust pipe 5321 end of the secondary sampling valve 53 is placed into the detection instrument and gently touched to the exhaust pipe 5321 end, so that the gas tube plate 532 slides into the piston 531. Referring to the working principle of the primary sampling valve 4, the sample gas can be discharged into the detection instrument. When the gas in the sampling cylinder 52 is discharged, the piston 531 slides to the connecting valve 51 end for the next sampling.

[0028] The specific method of using this invention is as follows: Step 1: First, assemble the connecting flange 2, fastening device 3, and primary sampling valve 4; Step 2: Screw several fastening nuts 35 into the threaded holes of the connecting flange 2 in the same direction, and then rotate the drive body 31 onto the outer wall of the sealing cylinder 22. Step 3: In the cavity of the protective ring wall 21, adjust the gears 351 of several fastening nuts 35 and the gear disk 311 on one end of the outer wall of the drive body 31 to mesh. Then press the end of the gear disk 311 of the drive body 31 inward to fit tightly against the connecting flange 2, and fix the mounting cover 34 to the end of the protective ring wall 21. Step 4: Install the retaining ring 33 on the outer end of the drive body 31 to abut against the fixed hand dial 32, and slide the first-stage sampling valve 4 inside the sealing cylinder 22 of the connecting flange 2; Step 5: Install the sealing gasket 6 on the end of the connecting flange 2, then align the fastening nuts 35 with the threaded holes of the mounting flange seat 11, rotate the hand dial 32, the hand dial 32 drives the drive body 31 to rotate, the gear 311 of the drive body 31 drives the gear 351 of the fastening nuts 35 to rotate, thereby fixing the connecting flange 2 on the mounting flange seat 11. Step 6: Connect the connecting valve 51 of the sampler 5 to the snap-fit ​​platform 422 of the gas outlet pipe 421, press the sampler 5 inward so that the gas sampling plate 42 slides into the sealing seat 41, and the main air inlet 423 and the main exhaust port 424 on the gas sampling plate 42 are connected so that the gas in the gas transmission pipeline 1 can be discharged outward through the gas outlet pipe 421. Step 7: The sampling gas enters the sampling cylinder 52. When it is necessary to transfer the sample gas in the sampling cylinder 52, put the exhaust pipe 5321 end of the secondary sampling valve 53 into the detection instrument and gently touch the exhaust pipe 5321 end to make the gas tube plate 532 slide into the piston 531. Referring to the principle of step 6, the sample gas can be discharged into the detection instrument.

[0029] Working principle: First, assemble the connecting flange 2, fastening device 3, and primary sampling valve 4; screw several fastening nuts 35 into the threaded holes of the connecting flange 2 in the same direction; then, rotate the drive body 31 onto the outer wall of the sealing cylinder 22; adjust the gears 351 of several fastening nuts 35 and the gear discs 311 on one end of the outer wall of the drive body 31 to mesh in the cavity of the protective ring wall 21; then press the end of the gear disc 311 of the drive body 31 inward to fit tightly against the connecting flange 2; fix the mounting cover 34 to the end of the protective ring wall 21; install the fixing ring 33 on the outer end of the drive body 31 to abut against the fixing hand dial 32; slidably install the primary sampling valve 4 inside the sealing cylinder 22 of the connecting flange 2; install the sealing gasket 6 on the end of the connecting flange 2; then align several fastening nuts 35 with several threaded holes of the mounting flange seat 11, rotate the hand dial 32, and the hand dial 32 drives the drive body 31 to rotate. The gear 311 of plate 1 drives the gears 351 of several fastening nuts 35 to rotate, thereby fixing the connecting flange 2 on the mounting flange seat 11; the connecting valve 51 of the sampler 5 is connected to the snap-fit ​​platform 422 of the gas outlet pipe 421, and the sampler 5 is pressed inward so that the gas sampling plate 42 slides into the sealing seat 41. The main air inlet 423 and the main exhaust port 424 on the gas sampling plate 42 are connected so that the gas in the gas transmission pipeline 1 can be discharged outward through the gas outlet pipe 421; the sampling gas enters the sampling cylinder 52. When it is necessary to transfer the sample gas in the sampling cylinder 52, the exhaust pipe 5321 end of the secondary sampling valve 53 is placed into the detection instrument and gently touched to the exhaust pipe 5321 end, so that the gas pipe plate 532 slides into the piston 531. Referring to the principle of step 6, the sample gas can be discharged into the detection instrument. When the gas in the sampling cylinder 52 is discharged, the piston 531 slides to the connecting valve 51 end for the next sampling.

[0030] The beneficial effects of the present invention are specifically reflected in the fact that 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas sampling device for a gas reservoir type gas storage facility, comprising a gas transmission pipeline (1), wherein the gas transmission pipeline (1) is provided with a mounting flange (11) for connecting to the outside, characterized in that, It also includes a connecting flange (2), a fastening device (3), a primary sampling valve (4), and a sampler (5); The threaded end of the fastening device (3) passes through the connecting flange (2), and the fastening device (3) and the mounting flange seat (11) are threadedly connected. The primary sampling valve (4) is slidably installed in the cavity of the connecting flange (2), and one end of the primary sampling valve (4) is snapped into the sampler (5); The sampler (5) includes a connecting valve (51), a sampling cylinder (52), and a secondary sampling valve (53). The connecting valve (51) is snapped onto one end of the primary sampling valve (4). The sampling cylinder (52) is fixedly installed at one end of the connecting valve (51). The secondary sampling valve (53) is slidably installed inside the cavity of the sampling cylinder (52). A sealing cap (54) is installed at the end of the sampling cylinder (52).

2. The gas sampling device for a gas reservoir type gas storage facility according to claim 1, characterized in that, One end of the connecting flange (2) is provided with a protective ring wall (21), and a sealing cylinder (22) is provided in the cavity of the protective ring wall (21). A through hole (221) is provided at the outer end of the sealing cylinder (22). The primary sampling valve (4) is slidably connected in the sealing cylinder (22), and one end of the primary sampling valve (4) passes through the through hole (221).

3. A gas sampling device for a gas reservoir-type gas storage facility according to claim 2, characterized in that, The fastening device (3) includes a drive body (31), a hand disc (32), a fixing ring (33), a mounting cover (34), and several fastening nuts (35). The drive body (31) is rotatably mounted on the outer wall of the sealing cylinder (22). The hand disc (32) is snapped onto the drive body (31). The fixing ring (33) is mounted on one end of the drive body (31) to abut against and fix the hand disc (32). The other end of the drive body (31) rotatably abuts against the connecting flange (2). The mounting cover (34) is fixed to the end of the protective ring wall (21). One end of several fastening nuts (35) passes through several threaded holes of the connecting flange (2), and several fastening nuts (35) are rotatably connected to the other end of the drive body (31).

4. A gas sampling device for a gas reservoir type gas storage facility according to claim 3, characterized in that, Each of the fastening nuts (35) is provided with a gear (351) at one end, and a gear disc (311) is provided on the outer wall of one end of the drive body (31), and several gears (351) are respectively meshed on the gear disc (311).

5. A gas sampling device for a gas reservoir type gas storage facility according to claim 4, characterized in that, A limiting ring (312) is provided in the middle of the driving body (31), and the limiting ring (312) abuts against the inner wall of the mounting cover (34). A hexagonal platform (313) is provided at one end of the driving body (31), and the hand turntable (32) and the fixing ring (33) are respectively fixed on the hexagonal platform (313).

6. A gas sampling device for a gas reservoir type gas storage facility according to claim 5, characterized in that, The primary sampling valve (4) includes a sealing seat (41), a gas sampling plate (42), a main pressure spring (43), and an end cap (44). The sealing seat (41) is engaged in the through hole (221) of the sealing cylinder (22). The gas sampling plate (42) is slidably connected in the sealing seat (41). The main pressure spring (43) abuts between the gas sampling plate (42) and the end cap (44), and the main pressure spring (43) is located inside the sealing cylinder (22). The end cap (44) is fixed to the port of the sealing cylinder (22). One end of the air intake plate (42) is provided with an air outlet pipe (421). The end of the air outlet pipe (421) is provided with a snap-fit ​​platform (422). The connecting valve (51) is snapped onto the snap-fit ​​platform (422). The air intake plate (42) is provided with a main air inlet hole (423). The end of the air outlet pipe (421) located inside the sealing seat (41) is provided with a main exhaust hole (424).

7. A gas sampling device for a gas reservoir type gas storage facility according to claim 6, characterized in that, The connecting valve (51) is equipped with a check valve (55) to prevent gas leakage.

8. A gas sampling device for a gas reservoir type gas storage facility according to claim 7, characterized in that, The secondary sampling valve (53) includes a piston (531), a gas tube disc (532), a secondary pressure spring (533), and an abutment nut (534). One end of the piston (531) is provided with a connecting pipe (535), and the other end of the piston (531) is provided with a limiting groove (536). A sealing ring (56) is installed on the piston (531). One end of the gas tube disc (532) is engaged in the limiting groove (536), and the gas tube disc (532) is provided with an exhaust valve. The exhaust pipe (5321) has one end extending out of the connecting pipe (535), the abutting nut (534) is fixed at one end of the exhaust pipe (5321), the secondary compression spring (533) is installed between the end of the connecting pipe (535) and the abutting nut (534), the air pipe disc (532) has a secondary air inlet hole (5322), and the exhaust pipe (5321) has a secondary exhaust hole (5322) at one end inside the piston (531).

9. A gas sampling device for a gas reservoir-type gas storage facility according to claim 1, characterized in that, A sealing gasket (6) is installed between the connecting flange (2) and the mounting flange.

10. The method of using the gas sampling device for a gas reservoir type gas storage facility according to claim 7, characterized in that, Includes the following steps: Step 1: First, assemble the connecting flange (2), fastening device (3), and primary sampling valve (4); Step 2: Screw several fastening nuts (35) into the threaded holes of the connecting flange (2) in the same direction, and then rotate the drive body (31) onto the outer wall of the sealing cylinder (22); Step 3: In the cavity of the protective ring wall (21), adjust the gears (351) of several fastening nuts (35) and the gear disk (311) on one end of the outer wall of the drive body (31) to mesh. Then press the end of the gear disk (311) of the drive body (31) inward to fit tightly against the connecting flange (2), and fix the mounting cover (34) to the end of the protective ring wall (21). Step 4: Install the fixing ring (33) on the outer end of the drive body (31) to abut against the fixed hand turntable (32), and slide the first-stage sampling valve (4) inside the sealing cylinder (22) of the connecting flange (2); Step 5: Install the sealing gasket (6) at the end of the connecting flange (2), then align several fastening nuts (35) with several threaded holes of the mounting flange seat (11), rotate the hand dial (32), the hand dial (32) drives the drive body (31) to rotate, the gear plate (311) of the drive body (31) drives the gear (351) of several fastening nuts (35) to rotate, thereby fixing the connecting flange (2) on the mounting flange seat (11); Step 6: Connect the connecting valve (51) of the sampler (5) to the snap-fit ​​platform (422) of the gas outlet pipe (421), press the sampler (5) inward so that the gas sampling plate (42) slides into the sealing seat (41), and the main air inlet (423) and the main exhaust port (424) on the gas sampling plate (42) are connected so that the gas in the gas transmission pipeline (1) can be discharged outward through the gas outlet pipe (421); Step 7: The sampling gas enters the sampling cylinder (52). When it is necessary to transfer the sample gas in the sampling cylinder (52), put the exhaust pipe (5321) end of the secondary sampling valve (53) into the detection instrument and gently touch the exhaust pipe (5321) end to make the gas tube plate (532) slide into the piston (531). Referring to the principle of step 6, the sample gas can be discharged into the detection instrument.

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