A leak detection device and method for underground gas storage facilities

Abstract

This invention relates to the field of underground gas storage technology, specifically disclosing a leak detection device and method for underground gas storage facilities. The device includes: a sealing sleeve; a gas sensor; a sealing assembly comprising two sets of sealing rings spaced apart between the sealing sleeve and the gas delivery pipe, the gas delivery pipe, the sealing sleeve, and the two sets of sealing rings forming a sealed cavity; and a traction assembly comprising a winch mechanism, a traction rope, and a first flexible hose, the winch mechanism being used to drive the gas sensor and the sealing rings to move along the gas delivery pipe. A sealed cavity is formed between the gas delivery pipe and the sealing sleeve by the sealing assembly, and detection gas is introduced through it. The gas sensor is installed inside the gas delivery pipe. By determining whether the detection gas leaks from the sealed cavity into the gas delivery pipe, a leak in the gas delivery pipe can be determined. The traction assembly allows the sealing assembly and the gas sensor to be moved to any position on the delivery pipe. This invention is simple and convenient, and can accurately locate the leak point, improving inspection efficiency and reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of underground gas storage technology, specifically to a leak detection device and method for underground gas storage facilities. Background Technology

[0002] Underground gas storage facilities utilize porous underground media or enclosed spaces to store natural gas, primarily for seasonal peak shaving, emergency gas supply, and strategic reserves. Core types include depleted oil and gas reservoir storage (utilizing abandoned oil and gas fields), aquifer storage (utilizing groundwater layers), salt cavern storage (artificially created salt cavities), and abandoned mine pit storage. Salt cavern storage has become the mainstream choice due to its excellent sealing and high injection-production efficiency. Natural gas is injected into the salt cavity through production casing, while the technical casing and annulus structure ensure safety. Its advantages lie in large-scale storage and rapid response to demand fluctuations, but it requires rigorous leakage risk monitoring to ensure geological stability and sealing. In the context of the global energy transition, underground gas storage is a critical infrastructure in the natural gas industry chain.

[0003] Chinese patent application CN112798196A discloses a method and apparatus for detecting leaks in underground gas storage facilities. The apparatus includes multiple underground salt chambers, a production casing connected to each salt chamber, and a technical casing fitted outside the production casing. An annulus is formed between the production casing and the technical casing. One end of the production casing and the technical casing extends to the ground. The detection method analyzes the natural gas in the production casing and the annulus of one salt chamber to obtain a first analysis result. This method solves the problems of low detection efficiency and high cost of current downhole instrument-based methods for detecting leaks in underground gas storage facilities.

[0004] However, the above-mentioned device still has the following problems in its implementation: When testing the sealing performance of pipelines, the tracer method is often used, that is, a specific tracer is injected into the pipeline. If there is a leak in the pipeline, the tracer will seep out from the damaged area, thus indicating that the pipeline has leaked. However, since pipelines are usually connected by welding, the phenomenon of tracer leaking from the pipeline can only confirm that there is a leak problem, but cannot accurately locate the specific leak location. This brings great inconvenience to subsequent targeted inspection and repair work.

[0005] Therefore, it is necessary to provide a device and method that can detect and accurately locate leaks in underground gas storage facilities in order to solve the aforementioned problems in the prior art. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an underground gas storage leakage detection device and method that can detect whether an underground gas storage facility is leaking and accurately locate the leak.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A leak detection device for an underground gas storage facility, comprising:

[0009] A sealing sleeve is fitted over the outside of the gas transmission pipe of the underground gas storage facility.

[0010] A gas sensor, wherein the gas sensor is disposed inside the gas delivery pipe and is configured to be movable along the axial direction of the gas delivery pipe;

[0011] The sealing assembly includes two sets of sealing rings spaced apart between the sealing sleeve and the gas supply pipe. The two sets of sealing rings are movably arranged along the axial direction of the gas supply pipe, and both sets of sealing rings are configured to make sealing contact with the gas supply pipe and the sealing sleeve. The gas supply pipe, the sealing sleeve, and the two sets of sealing rings together form a sealing cavity.

[0012] The traction assembly includes a winch mechanism, a traction rope, and a first hose. The first end of the traction rope is connected to the winch mechanism, and the second end of the traction rope is connected to a gas sensor. The first end of the first hose is connected to the winch mechanism and communicates with a pumping assembly. The second end of the first hose is fixedly connected to two sets of sealing rings and communicates with the sealed cavity. During leak detection, the pumping assembly is used to introduce detection gas into the sealed cavity through the first hose, and the winch mechanism is used to drive the gas sensor and sealing rings to move axially along the gas supply pipe.

[0013] As a further improvement to the above technical solution:

[0014] The sealing ring is an inflatable sealing ring. The traction assembly also includes a second hose. The first end of the second hose is connected to the winch mechanism and communicates with the air pump assembly. The second end of the second hose is fixedly connected to the two sets of sealing rings and communicates with the inside of the sealing rings. The air pump assembly is used to inflate the sealing rings with air through the second hose.

[0015] As a further improvement to the above technical solution:

[0016] The hoisting mechanism includes a support frame, a rotating roller, a winding reel, and a drive motor;

[0017] The rotating roller is rotatably mounted on the support frame, and multiple sets of take-up reels are spaced apart on the rotating roller. The traction rope, the first hose, and the second hose are mounted on the rotating roller and separated by the take-up reels. The drive motor is mounted on the support frame and is connected to the rotating roller for transmission.

[0018] As a further improvement to the above technical solution:

[0019] The end of the traction rope is provided with a counterweight, and the ends of the first hose and the second hose are both fixedly connected to a counterweight ring.

[0020] As a further improvement to the above technical solution:

[0021] The traction rope is also equipped with a support sleeve, and the support sleeve has rollers on its circumference, which make rolling contact with the inner wall of the gas pipeline.

[0022] As a further improvement to the above technical solution:

[0023] The air pump assembly includes a first air storage tank, a second air storage tank, and a pressurizing pump;

[0024] The first gas storage shell stores the detection gas that can be detected by the gas sensor, and the first gas storage shell is connected to the first hose; the second gas storage shell stores the gas used to inflate the sealing ring, and the second gas storage shell is connected to the second hose.

[0025] Both the first and second gas storage tanks are connected to a pressurization pump.

[0026] As a further improvement to the above technical solution:

[0027] The inner side of the sealing ring is provided with a sealing gasket for sealing contact with the gas transmission pipe; the outer side of the sealing ring is provided with a sealing gasket for sealing contact with the sealing sleeve.

[0028] As a further improvement to the above technical solution:

[0029] The gas sensor is located between two sets of sealing rings.

[0030] As a further improvement to the above technical solution:

[0031] It also includes a solenoid valve installed on the gas pipeline, which is used to control the opening and closing of the gas pipeline.

[0032] The present invention also provides a method for detecting leaks in underground gas storage facilities. The method uses an underground gas storage facility leak detection device for detection and includes the following steps:

[0033] S1: Disconnect the gas supply line between the underground gas storage facility and the gas pipeline, and remove the external pipes connected to the top of the gas pipeline.

[0034] S2: Set up the hoisting mechanism on the top of the gas pipeline, put the gas sensor into the gas pipeline, and put the two sets of sealing rings between the sealing sleeve and the gas pipeline.

[0035] S3: Start the hoisting mechanism to release the traction rope, the first hose and the second hose; the gas sensor on the traction rope is moved to the position to be detected on the gas pipeline by the gravity of the counterweight, and the gas sensor is always located on the axis of the gas pipeline by the support sleeve; the sealing rings on the first hose and the second hose are moved to the position to be detected on the gas pipeline by the gravity of the counterweight ring, and the gas sensor is kept between the two sets of sealing rings.

[0036] S4: Fix the hoisting mechanism, start the air pump assembly to inflate the two sets of sealing rings, and after the two sets of sealing rings are inflated, they expand and form a sealing cavity with the air supply pipe and the sealing sleeve.

[0037] S5: Start the air pump assembly to discharge the detection gas into the sealed cavity;

[0038] S6: Determine whether the detected gas exists in the gas delivery pipe using a gas sensor;

[0039] If the gas sensor detects the gas being detected, it is determined that there is a leak in the gas supply pipe between the two sets of sealing rings; otherwise, it is determined that there is no leak in the gas supply pipe between the two sets of sealing rings.

[0040] S7: Repeat steps S3-S6 to check all the locations that need to be checked in the gas pipeline until the leak detection of the underground gas storage is completed.

[0041] Compared with the prior art, the advantages of the present invention are as follows:

[0042] 1. A leak detection device for an underground gas storage facility according to the present invention includes: a sealing sleeve, which is sleeved on the outside of a gas transmission pipe of the underground gas storage facility; a gas sensor, which is disposed inside the gas transmission pipe and configured to move axially along the gas transmission pipe; a sealing assembly, including two sets of sealing rings spaced apart between the sealing sleeve and the gas transmission pipe, the two sets of sealing rings being movably disposed along the axial direction of the gas transmission pipe, and both sets of sealing rings being configured to make sealing contact with the gas transmission pipe and the sealing sleeve, the gas transmission pipe, the sealing sleeve, and the two sets of sealing rings forming a sealed cavity; and a traction assembly, which includes a winch mechanism, a traction rope, and a first hose, the first end of the traction rope being connected to the winch mechanism, the second end of the traction rope being connected to the gas sensor, the first end of the first hose being connected to the winch mechanism and communicating with a pumping assembly, the second end of the first hose being fixedly connected to the two sets of sealing rings and communicating into the sealed cavity. During leak detection, the pumping assembly is used to introduce detection gas into the sealed cavity through the first hose, and the winch mechanism is used to drive the gas sensor and the sealing rings to move axially along the gas transmission pipe. Through the synergistic action of the sealing assembly and the gas sensor, the sealing assembly forms a sealed cavity between the gas delivery pipe and the sealing sleeve, effectively isolating external interference and facilitating positioning. Detection gas is introduced into the sealed cavity, and the gas sensor is positioned inside the gas delivery pipe. By determining whether the detection gas leaks from the sealed cavity into the gas delivery pipe, the system can determine whether that section of the gas delivery pipe is damaged or leaking. Simultaneously, the traction assembly allows the sealing assembly and gas sensor to be moved to any position on the delivery pipe. Compared to traditional tracer methods that can only detect leaks, the detection method of this invention is convenient and simple, while accurately locating the leak point, significantly improving maintenance efficiency and reducing maintenance costs.

[0043] 2. The traction component of this invention, together with the counterweight and rollers, ensures that the gas sensor moves smoothly within the gas pipeline, avoiding jamming or deviation, and enabling it to adapt to the complex and ever-changing working environment of underground gas storage facilities. This stable structural design not only extends the service life of the device but also improves the accuracy of the detection results.

[0044] 3. In addition to achieving the traction function, the first hose and the second hose of the present invention, through their cooperation with the rotating roller and the air pumping assembly, can also accurately inflate the sealing ring and output gas for gas sensor detection into the sealing cavity, respectively, thereby achieving the gas delivery function. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of an underground gas storage leakage detection device according to the present invention;

[0046] Figure 2 This is a schematic diagram of the connection of the traction component in a leak detection device for an underground gas storage facility.

[0047] Figure 3This is a schematic diagram illustrating the use of a sealing ring in a leak detection device for an underground gas storage facility.

[0048] Figure 4 This is a schematic diagram of the connection of the traction component in a leak detection device for an underground gas storage facility.

[0049] Figure 5 This is a schematic diagram of the connection of the air pump assembly in an underground gas storage leak detection device.

[0050] In the attached diagram: 1. Underground gas storage tank; 2. Gas pipeline; 3. Sealing sleeve; 4. Gas sensor; 5. Sealing assembly; 501. Sealing ring; 502. Sealing gasket; 6. Traction assembly; 601. Hoisting mechanism; 6011. Rotating roller; 6012. Reel; 6013. Support frame; 6014. Drive motor; 6015. Gear; 6016. Gear ring; 602. Traction rope; 603. First hose; 604. Second hose; 605. Counterweight; 606. Counterweight ring; 607. Support sleeve; 608. Roller; 7. Pumping assembly; 701. First gas storage tank; 702. Second gas storage tank; 703. Pressurization pump; 8. Solenoid valve. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] like Figure 1-5As shown, this embodiment provides a leak detection device for an underground gas storage facility, comprising: a sealing sleeve 3, which is sleeved on the outside of the gas transmission pipe 2 of the underground gas storage facility 1; the gas transmission pipe 2 is used to transport natural gas from the underground gas storage facility 1 to the outside, and this embodiment mainly detects whether the transmission pipe is leaking; a gas sensor 4, which is disposed inside the gas transmission pipe 2 and is configured to move axially along the gas transmission pipe 2; and a sealing assembly 5, including two sets of sealing rings 501 spaced apart between the sealing sleeve 3 and the gas transmission pipe 2, wherein the sealing rings 501 are inflatable sealing rings, and in this embodiment, the sealing rings 501 are rubber sealing rings 501; the two sets of sealing rings 501 are configured to move axially along the gas transmission pipe 2, and Both sets of sealing rings 501 are configured to make sealing contact with the gas supply pipe 2 and the sealing sleeve 3, forming a sealed cavity together with the gas supply pipe 2, the sealing sleeve 3, and the two sets of sealing rings 501. A traction assembly 6 is included, comprising a winch mechanism 601, a traction rope 602, and a first hose 603. The first end of the traction rope 602 is connected to the winch mechanism 601, and the second end is connected to the gas sensor 4. The first end of the first hose 603 is connected to the winch mechanism 601 and communicates with a pumping assembly 7. The second end of the first hose 603 is fixedly connected to the two sets of sealing rings 501 and communicates into the sealed cavity. The pumping assembly 7 introduces detection gas into the sealed cavity through the first hose 603. The winch mechanism 601 drives the gas sensor 4 and the sealing rings 501 to move axially along the gas supply pipe 2.

[0053] In this embodiment, the underground gas storage leak detection device forms a sealed cavity between the gas delivery pipe 2 and the sealing sleeve 3 through the sealing assembly 5. Detection gas is introduced into the sealed cavity, and the gas sensor 4 is installed inside the gas delivery pipe 2. By determining whether the detection gas leaks from the sealed cavity into the gas delivery pipe 2, the device can determine whether that section of the gas delivery pipe 2 is damaged or leaking. Simultaneously, the sealing assembly 5 and the gas sensor 4 can be moved to any position on the delivery pipe via the traction assembly 6. The detection method is convenient and simple, and can accurately locate the leak point.

[0054] By setting two sets of sealing rings 501, the detection area can be effectively isolated to form a closed detection space, preventing external interference. At the same time, if a leak is detected, the location of the leak can be clearly identified.

[0055] The traction assembly 6 also includes a second hose 604. The first end of the second hose 604 is connected to the winch mechanism 601 and communicates with the air pump assembly 7. The second end of the second hose 604 is fixedly connected to the two sets of sealing rings 501 and communicates with the sealing rings 501. The air pump assembly 7 can inflate the sealing rings 501 through the second hose 604.

[0056] In this embodiment, both the first hose 603 and the second hose 604 are made of corrugated pipe material and have metal wires installed inside, which can bear the weight and maintain the normal flow of gas.

[0057] With the first hose 603 and the second hose 604, the sealing ring 501 can be pulled and retracted freely. At the same time, the first hose 603 is connected to the air pump assembly 7 and the sealing cavity, so that detection gas can be introduced into the sealing cavity. The second hose 604 is connected to the sealing ring 501, so that the sealing ring 501 can be inflated to form a sealing cavity.

[0058] The hoisting mechanism 601 includes a support frame 6013, a rotating roller 6011, a take-up reel 6012, and a drive motor 6014. The rotating roller 6011 is rotatably mounted on the support frame 6013. Multiple sets of take-up reels 6012 are spaced apart on the rotating roller 6011. The traction rope 602, the first flexible hose 603, and the second flexible hose 604 are mounted on the rotating roller 6011 and separated by the take-up reels 6012. The drive motor 6014 is mounted on the support frame 6013 and is connected to the rotating roller 6011 for transmission. (Reference) Figure 5 In this embodiment, the first hose 603 and the second hose 604 start from the gas storage shell, are pumped by the pressure pump 703 in the middle, and then pass through the axis of the rotating roller 6011 and are wound around the rotating roller 6011, thus realizing the traction function and the gas delivery function at the same time.

[0059] In this embodiment, a gear 6015 is installed at the output end of the drive motor 6014, and a toothed ring 6016 is provided on the rotating roller 6011. The drive motor 6014 drives the rotating roller 6011 to rotate through the meshing of the gear 6015 and the toothed ring 6016.

[0060] The support frame 6013 is also fixedly connected to a base at its bottom.

[0061] The end of the traction rope 602 is provided with a counterweight 605, and the ends of the first hose 603 and the second hose 604 are both fixedly connected to a counterweight ring 606. With the setting of the counterweight 605 and the counterweight ring 606, when the gas sensor 4 and the sealing ring 501 are released, they can fall vertically naturally by gravity without the need for other external forces, and can avoid jamming.

[0062] In this embodiment, a counterweight ring 606 is provided, and the ends of the first hose 603 and the second hose 604 are respectively connected to two symmetrical points of the counterweight ring 606. The lengths of the first hose 603 and the second hose 604 are consistent, so that the plane where the sealing ring 501 is located is as perpendicular as possible to the axis of the gas pipeline 2, thus ensuring the sealing effect.

[0063] The traction rope 602 is also equipped with a support sleeve 607, and the support sleeve 607 has rollers 608 on its circumference. The rollers 608 also make rolling contact with the inner wall of the gas delivery pipe 2. Through the above configuration, the smoothness of movement is improved, and the gas sensor 4 can always be located on the axis of the gas delivery pipe 2, protecting the gas sensor 4 from collisions and reducing friction. At the same time, in conjunction with the setting of the counterweight 605, it can also ensure that the traction rope 602 is located on the axis of the gas delivery pipe 2, avoiding folding and tangling, thereby facilitating accurate positioning of the gas sensor 4.

[0064] The pump assembly 7 includes a first gas storage shell 701, a second gas storage shell 702, and a pressurizing pump 703. The first gas storage shell 701 stores a detection gas, which is either a gas type detectable by a gas sensor or contains gas components detectable by a gas sensor. Furthermore, the detection gas should be distinguishable from the natural gas stored in the underground gas storage facility to avoid interference from the natural gas, which could affect the detection results. Correspondingly, the gas sensor in this embodiment can be one of the following: a semiconductor gas sensor, an electrochemical gas sensor, a catalytic combustion gas sensor, a thermal conductivity gas sensor, an infrared gas sensor, or a solid electrolyte gas sensor. It should be able to detect at least one gas that is different from the natural gas stored in the underground gas storage facility in this embodiment, and this differentiating gas can be used as the detection gas in this embodiment. For example, if the detection gas is carbon dioxide, the gas sensor is set to detect a certain concentration of carbon dioxide, which is then considered a detection of the detection gas, indicating a leak. The specific concentration setting is determined based on the natural gas composition of the underground gas storage facility, and the influence of trace amounts of carbon dioxide present in the natural gas needs to be avoided.

[0065] The first gas storage shell 701 is connected to the first hose 603; the second gas storage shell 702 stores gas for inflating the sealing ring 501, and the second gas storage shell 702 is connected to the second hose 604; both the first gas storage shell 701 and the second gas storage shell 702 are connected to the pressure pump 703.

[0066] The inner side of the sealing ring 501 is provided with a sealing gasket 502 for sealing contact with the gas transmission pipe 2; the outer side of the sealing ring 501 is provided with a sealing gasket 502 for sealing contact with the sealing sleeve 3. The sealing gasket 502 further ensures the sealing contact between the sealing ring 501 and the outer wall of the gas transmission pipe 2 and the inner wall of the sealing sleeve 3.

[0067] The gas sensor 4 is located between the two sets of sealing rings 501. With the above arrangement, when the gas supply pipe 2 between the sealing rings 501 leaks, the gas sensor 4 can detect it immediately and send a signal, improving detection efficiency.

[0068] It also includes a solenoid valve 8 installed on the gas supply pipe 2, which is used to control the opening and closing of the gas supply pipe 2.

[0069] This embodiment also provides a method for detecting leaks in underground gas storage facilities. The method uses the underground gas storage leak detection device described above and includes the following steps:

[0070] S1: When it is necessary to test the airtightness of the gas pipeline 2, the staff can activate the solenoid valve 8 to disconnect the gas passage between the underground gas storage 1 and the gas pipeline 2, and then remove the external pipe connected to the top of the gas pipeline 2.

[0071] S2: Set up the hoisting mechanism 601 on the top of the gas supply pipe 2, put the gas sensor 4 into the gas supply pipe 2, and put the two sets of sealing rings 501 between the sealing sleeve 3 and the gas supply pipe 2.

[0072] S3: Activate the hoisting mechanism 601 to release the traction rope 602, the first hose 603, and the second hose 604; the gas sensor 4 on the traction rope 602 is moved to the position to be detected on the gas supply pipe 2 by the gravity of the counterweight 605, and the gas sensor 4 is always positioned on the axis of the gas supply pipe 2 by the support sleeve 607; the sealing rings 501 on the first hose 603 and the second hose 604 are moved to the position to be detected on the gas supply pipe 2 by the gravity of the counterweight ring 606, and the gas sensor 4 is kept between the two sets of sealing rings 501; the lengths of the first hose 603 and the second hose 604 are set synchronously to keep the sealing rings 501 in a horizontal position;

[0073] S4: Fix the hoisting mechanism 601, start the air pump assembly 7 to inflate the two sets of sealing rings 501. After the two sets of sealing rings 501 are inflated, they expand and surround the air supply pipe 2 and the sealing sleeve 3 to form a sealed cavity. The sealing gasket 502 makes sealing contact with the outer surface of the air supply pipe 2 and the inner surface of the sealing sleeve 3, so that the two sets of sealing rings 501 are kept in a sealed state.

[0074] S5: Start the air pump assembly 7 to discharge the detection gas into the sealed cavity;

[0075] S6: Determine whether the detected gas exists in the gas supply pipe 2 using the gas sensor 4;

[0076] If the gas sensor 4 detects the gas, it is determined that there is a leak in the gas supply pipe 2 between the two sets of sealing rings 501; otherwise, it is considered that there is no leak in the gas supply pipe 2 between the two sets of sealing rings 501.

[0077] S7: Repeat steps S3-S6 to check all the locations that need to be checked in the gas pipeline 2 until the leak detection of the underground gas storage 1 is completed.

[0078] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and modifications obtained without departing from the inventive concept should also be considered within the scope of protection of the present invention.

Claims

1. An underground gas storage leak detection apparatus, characterized by, The utility model relates to a kind of underground gas storage leak detection device, including: Sealing sleeve, the sealing sleeve is sleeved outside the gas pipeline of underground gas storage; Gas sensor, the gas sensor is arranged in the gas pipeline and is arranged as can be axially moved along the gas pipeline; Sealing assembly, including two groups of sealing rings arranged between sealing sleeve and gas pipeline, two groups of the sealing ring are arranged along the axial movement of gas pipeline, and two groups of the sealing ring are arranged as can be sealed contact with gas pipeline and sealing sleeve, gas pipeline, sealing sleeve and two groups of the sealing ring are enclosed to form sealing cavity; Traction assembly, the traction assembly includes winch mechanism, traction rope and first hose, the first end of the traction rope is connected winch mechanism, the second end of traction rope is connected gas sensor, the first end of the first hose is connected winch mechanism and communicates pump gas assembly, the second end of the first hose is fixedly connected with two groups of the sealing ring and communicates to sealing cavity, when leak detection, the pump gas assembly is used to pass through the first hose and introduce detection gas into sealing cavity, the winch mechanism is used to drive gas sensor and sealing ring to do axial movement along the gas pipeline.

2. The underground gas storage leak detection apparatus of claim 1, wherein, The sealing ring is inflatable sealing ring, and the traction assembly further includes a second hose, the first end of the second hose is connected winch mechanism and communicates pump gas assembly, the second end of the second hose is fixedly connected with two groups of the sealing ring and communicates to the sealing ring, and the pump gas assembly is used to inflate the sealing ring by the second hose.

3. The underground gas storage leak detection apparatus of claim 2, wherein, The winch mechanism includes a support frame, a rotating roller, a plurality of winding discs, and a drive motor. The rotating roller is rotatably arranged on the support frame, the winding discs are arranged in multiple groups on the rotating roller, the traction rope, the first hose, and the second hose are arranged on the rotating roller and separated by the winding discs, and the drive motor is mounted on the support frame and in transmission connection with the rotating roller.

4. The underground gas storage leak detection apparatus of claim 3, wherein, The end of the traction rope is provided with a counterweight, and the ends of the first hose and the second hose are fixedly connected with counterweight rings.

5. The underground gas storage leak detection apparatus of claim 3, wherein, The traction rope is further provided with a support sleeve, the support sleeve is circumferentially provided with rollers, and the rollers are in rolling contact with the inner wall of the gas pipeline.

6. The apparatus of any one of claims 2-5, wherein, The pump gas assembly includes a first gas storage shell, a second gas storage shell, and a pressure pump. The first gas storage shell stores a detection gas that can be detected by the gas sensor, and the first gas storage shell is in communication with the first hose. The first gas storage shell and the second gas storage shell are both in communication with the pressure pump.

7. The underground gas storage leak detection apparatus of claim 1, wherein, The inner side of the sealing ring is provided with a sealing pad for sealing contact with the gas pipeline, and the outer side of the sealing ring is provided with a sealing pad for sealing contact with the sealing sleeve.

8. The underground gas storage leak detection apparatus of claim 1, wherein, The gas sensor is located between the two groups of sealing rings.

9. The underground gas storage leak detection apparatus of claim 1, wherein, Further comprising an electromagnetic valve arranged on the gas pipeline, the electromagnetic valve is used to control the on-off of the gas pipeline.

10. A method of detecting a leak in an underground gas storage reservoir, the method comprising: The underground gas storage leak detection device is used for detection, including the following steps: S1: disconnect the gas path of underground gas storage and gas pipeline, remove the external pipeline connected to the top of the gas pipeline; S2: erect the winch mechanism to the top of the gas pipeline, put the gas sensor into the gas pipeline, and put the two groups of sealing rings between the sealing sleeve and the gas pipeline. S3: Start the winch mechanism to release the traction rope, the first hose and the second hose; drive the gas sensor on the traction rope to the position to be detected of the gas pipeline by the gravity of the counterweight, and keep the gas sensor on the axis of the gas pipeline by the support sleeve; drive the sealing rings on the first hose and the second hose to the position to be detected of the gas pipeline by the gravity of the counterweight, and keep the gas sensor between the two groups of sealing rings; S4: Fix the winch mechanism, start the pump assembly to inflate the two groups of sealing rings, and form a sealed cavity with the gas pipeline and the sealing sleeve after the two groups of sealing rings are inflated and expanded; S5: Start the pump assembly to discharge the detection gas into the sealed cavity; S6: Determine whether the detection gas exists in the gas pipeline by the gas sensor; If the gas sensor detects the detection gas, it is determined that the gas pipeline between the two groups of sealing rings leaks, otherwise it is determined that the gas pipeline between the two groups of sealing rings does not leak; S7: Repeat steps S3-S6 to detect all positions of the gas pipeline in turn until the leakage detection of the underground gas storage is completed.

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