Device and method for detecting leakage of natural gas pipeline

Abstract

The invention belongs to the technical field of pipeline detection, and particularly relates to a natural gas pipeline leakage detection device and method.The device comprises a potential difference measuring instrument body, an installation vehicle is fixedly installed on the lower side of the potential difference measuring instrument body, and a lifting type soaking device is fixedly installed on the upper side of the installation vehicle and comprises a soaking bin; a soaking lifting plate is installed in the soaking bin in a sliding mode, a soaking lifting bin is rotatably installed on the soaking lifting plate, a compression type drilling mechanism is fixedly connected to the soaking lifting bin, a transmission type power mechanism is fixedly installed on the upper side of the soaking lifting plate, and a stirring type water blocking mechanism is fixedly installed on the lower side of the soaking bin. According to the device and the method, through the arrangement of corresponding mechanisms, the measuring point can be directly wetted while the potential difference measuring instrument is used, manual participation is reduced, waste of time and water resources is reduced, water can permeate the measuring point more easily, and the linear efficiency of measurement is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline detection, and in particular relates to a device and a method for detecting leakage of a natural gas pipeline. Background Art

[0002] A natural gas pipeline refers to a pipeline that transports natural gas (including associated gas produced in oil fields) from the production site or processing plant to urban gas distribution centers or industrial enterprise users. It is also called a gas transmission pipeline. Using a natural gas pipeline to transport natural gas is a way to transport large quantities of natural gas on land.

[0003] A gas leak is the accidental release of gas from a pipeline or cylinder into the air. Gas leaks can be harmful to health and the environment. Even a small leak into a building or other confined space can gradually build up to explosive or lethal gas concentrations. Natural gas leaks into the atmosphere are particularly harmful because of their global warming potential and ozone depletion potential.

[0004] The PCM detection technology uses the alternating current gradient method. By applying a sinusoidal voltage of a certain frequency between the pipeline and the ground, a detection signal current is emitted to the pipeline to be detected. The intensity and change law of the alternating electromagnetic field generated by the pipeline current are detected along the route on the ground. The change of the current in the pipe is calculated by converting the magnetic field strength of the ground above the pipeline, and the branch line position or damage defects of the pipeline are judged based on this.

[0005] The basic principle of PCM detection is: there is a distributed capacitance coupling effect between the anti-corrosion layer of the pipeline and the earth, and the anti-corrosion layer itself also has weak and stable conductivity. The signal current shows an exponential decay law during the propagation process when the anti-corrosion layer outside the pipeline is intact. When the anti-corrosion layer of the pipeline is damaged, the current in the pipe will flow into the earth from the damaged point. The current in the pipe will decay significantly, causing a sharp decrease in the ground magnetic field intensity, thereby locating the damage of the anti-corrosion layer. After obtaining the change of the detection current, the performance parameter value Rg of the anti-corrosion layer can be calculated according to the evaluation model. This method can not only locate the damage of the anti-corrosion layer and calculate the performance parameter value Rg of the anti-corrosion layer, but also accurately locate and describe the pipeline route and measure the depth. This test method largely eliminates the interference of the earth's electrical properties and stray currents, and is very practical.

[0006] During on-site measurement, a current signal is first applied to the measured pipeline with a transmitter, and then the current value at different points of the measured pipeline is detected by a receiver along the pipeline on the ground. PCM+ is used in conjunction with an AC ground potential difference meter, but dry ground will greatly reduce the accuracy of the potential difference meter. The existing potential difference meter cannot moisten the measuring point and needs to be moistened manually. Once in the field, it is difficult to moisten the measuring point when there is insufficient water. In addition, there are rigid requirements for the depth of the gas pipeline. Even if it is moistened manually, it is difficult to completely penetrate the measuring point, which requires a lot of time and water resources, affecting the measurement efficiency.

[0007] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0008] The object of the present invention is to provide a device and method for detecting natural gas pipeline leakage, which can solve the problem that the potential difference measuring instrument cannot wet the measuring point, which not only reduces the accuracy of the potential difference measuring instrument, but also affects the measuring efficiency of the potential difference measuring instrument.

[0009] In order to achieve the above object, the technical solution provided by the present invention is as follows:

[0010] On the one hand, a device for detecting leakage of a natural gas pipeline is provided. The device comprises a potential difference measuring instrument body, a ground contact detection joint is installed on each side of the potential difference measuring instrument body, a display screen is fixedly installed on the upper side of the potential difference measuring instrument body, an adjustment button is fixedly installed on the upper side of the potential difference measuring instrument body, a plurality of control knobs are fixedly installed on the upper side of the potential difference measuring instrument body, an installation vehicle is fixedly installed on the lower side of the potential difference measuring instrument body, a lifting type wetting device is fixedly installed on the upper side of the installation vehicle for wetting the land, the lifting type wetting device comprises a wetting bin, a wetting lifting plate is slidably installed in the wetting bin, a wetting lifting bin is rotatably installed on the wetting lifting plate, and a wetting lifting bin is fixedly installed on the outer side of the wetting lifting bin. There is a soaking conveying part, and a compression drilling mechanism is fixedly connected to the soaking lifting bin for drilling holes in the land. The compression drilling mechanism includes a compression motor, and a compression blocking plate is provided on the upper side of the compression motor. A compression bearing is fixedly installed between the compression motor and the soaking lifting bin, and a transmission power mechanism is fixedly installed on the upper side of the soaking lifting plate for driving the rotation of the soaking lifting bin. A toggle-type water-blocking mechanism is fixedly installed on the lower side of the soaking bin for pushing away the drilled soil. The toggle-type water-blocking mechanism includes a toggle support ring, and a toggle driven friction wheel is rotatably installed on the outer side of the toggle support ring, and a plurality of toggle arc pieces are provided on the lower side of the toggle driven friction wheel.

[0011] In one or more embodiments of the present invention, a wetting sealing ring is provided between the wetting bin and the wetting lifting plate, the wetting sealing ring is fixedly connected to the wetting lifting plate, the wetting lifting bin passes through the wetting bin, the wetting lifting plate and the installation vehicle, and a wetting clamp is rotatably installed on the upper side of the wetting lifting bin.

[0012] In one or more embodiments of the present invention, the soaking clamp is fixedly connected to the soaking lifting plate, which facilitates the installation of the soaking clamp, improves the stability of the soaking clamp, and enables the soaking clamp to better engage with the soaking lifting bin;

[0013] A soaking water pump is fixedly installed on the upper side of the soaking clamp, which can extract the moisture in the soaking bin and inject the moisture in the soaking lifting bin into the soaking lifting bin, thereby providing moisture for soil soaking. The soaking water pump runs through the soaking clamp.

[0014] In one or more embodiments of the present invention, a pair of soaking electric telescopic rods are fixedly installed between the soaking bin and the soaking lifting plate, which can drive the soaking lifting bin to rise and fall, so that the rising and falling of the soaking lifting bin can be controlled;

[0015] A plurality of pairs of soaking and seepage nets are fixedly installed on the soaking and lifting bin, which facilitates the seepage of water so that the water can soak the soil. A seepage groove matching the plurality of pairs of soaking and seepage nets is opened on the soaking and lifting bin, which facilitates the installation of the soaking and seepage nets and improves the stability of the soaking and seepage nets.

[0016] In one or more embodiments of the present invention, the compression baffle is fixedly connected to the soaking lift bin, which reduces the damage of moisture to the compression motor, increases the service life of the compression motor, and improves the stability of the compression motor, and the compression motor is arranged to penetrate the soaking lift bin;

[0017] A compression drill bit is fixedly installed on the lower side of the compression motor, which can drill holes in the soil so that water can better penetrate deep into the soil.

[0018] In one or more embodiments of the present invention, the transmission power mechanism includes a transmission motor, which can drive the rotation of the transmission driving pulley to provide corresponding power for the rotation of the soaking and lifting bin, and the transmission motor is arranged through the soaking and lifting plate;

[0019] A transmission bearing is fixedly installed between the transmission motor and the soaking lifting plate, which facilitates the rotation of the transmission motor and reduces the friction between the transmission motor and the soaking lifting plate;

[0020] A driving pulley is fixedly mounted on the lower side of the driving motor, which can drive the rotation of the driven pulley through the transmission of the transmission belt, so that the driven pulley can drive the rotation of the soaking and lifting bin.

[0021] In one or more embodiments of the present invention, a driven pulley is fixedly installed on the outer side of the soaking and lifting bin and can be rotated by a transmission belt. A transmission belt is fixedly installed between the driving transmission pulley and the driven transmission pulley.

[0022] In one or more embodiments of the present invention, a toggle positioning ring is fixedly installed between each of the plurality of toggle arc pieces and the toggle driven friction wheel, which can fix the position of the toggle arc piece so that the toggle arc piece can better move the soil;

[0023] A toggle synchronization rod is fixedly installed on the soaking bin, which facilitates the installation of the toggle synchronization friction wheel, improves the stability of the toggle synchronization friction wheel, and synchronizes the rotation of a pair of toggle synchronization friction wheels. The toggle synchronization rod runs through the soaking bin.

[0024] In one or more embodiments of the present invention, a toggle synchronization friction wheel is installed on each side of the toggle synchronization rod, which can be driven by the toggle active friction wheel, so that the toggle driven friction wheel can drive the toggle arc piece to rotate, and a toggle active friction wheel is fixedly installed on the lower side of the transmission driven leather wheel, and the toggle active friction wheel matches the toggle synchronization friction wheel.

[0025] On the other hand, a method for detecting leakage in a natural gas pipeline using the above device is provided.

[0026] In one or more embodiments of the present invention, the method comprises the following steps:

[0027] S1. Drag the installation vehicle to the top of the measuring point, and control the extension and retraction of the electric telescopic rod to drive the lifting and lowering of the lifting and lowering bin;

[0028] S2, when the compression drill bit contacts the ground, the compression motor is turned on to rotate the compression drill bit and drill the ground;

[0029] S3, synchronously start the transmission motor, so that the transmission driven pulley drives the rotation of the soaking and lifting bin, and transports the soil to the ground through the soaking conveying member;

[0030] S4, the soaking water pump extracts the water in the soaking bin and injects it into the soaking lifting bin, so that the water seeps into the soil from the soaking seepage net;

[0031] S5. When the soaked lifting chamber penetrates deep into the ground, the active friction wheel will come into contact with the synchronous friction wheel. Under the influence of friction, the synchronous friction wheel will drive the rotation of the supporting ring, thereby causing the arc piece to rotate.

[0032] S6. The continuous rotation of the arc piece can push away the soil, reducing the waste of water and preventing the water from soaking the pushed soil.

[0033] Compared with the prior art, the device and method for detecting natural gas pipeline leakage of the present invention can directly moisten the measuring point while using a potential difference measuring instrument through the setting of corresponding mechanisms, thereby reducing manual participation, which not only reduces the waste of time and water resources, but also enables moisture to penetrate the measuring point more easily, thereby improving the line efficiency of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 is a front cross-sectional view of a device for detecting leakage of a natural gas pipeline in one embodiment of the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0037] Figure 3 for Figure 1 Schematic diagram of the structure at B in the middle;

[0038] Figure 4 for Figure 1 Schematic diagram of the structure at C in the middle;

[0039] Figure 5 for Figure 1 Schematic diagram of the structure at D in the middle;

[0040] Figure 6 for Figure 1 Schematic diagram of the structure at E in the middle;

[0041] Figure 7 for Figure 1 Schematic diagram of the structure at F in the middle;

[0042] Figure 8 It is a three-dimensional diagram of a device for detecting leakage of a natural gas pipeline in one embodiment of the present invention.

[0043] Description of main reference numerals:

[0044] 1- Potential difference measuring instrument body, 101- Ground detection connector, 102- Display screen, 103- Adjustment button, 104- Control knob, 105- Installation vehicle, 2- Lifting soaking device, 201- Soaking bin, 202- Soaking lifting plate, 203- Soaking lifting bin, 204- Soaking conveying part, 205- Soaking sealing ring, 206- Soaking clamping part, 207- Soaking water pump, 208- Soaking electric telescopic rod, 209- Soaking water seepage net, 3- Compression drilling mechanism, 301- Compression electric Machine, 302-compression baffle plate, 303-compression bearing, 304-compression drill bit, 4-transmission power mechanism, 401-transmission motor, 402-transmission bearing, 403-transmission active leather wheel, 404-transmission driven leather wheel, 405-transmission belt, 5-toggle water blocking mechanism, 501-toggle support ring, 502-toggle driven friction wheel, 503-toggle arc sheet, 504-toggle positioning ring, 505-toggle synchronization rod, 506-toggle synchronization friction wheel, 507-toggle active friction wheel. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0046] like Figures 1 to 8 As shown, a device for detecting leakage of a natural gas pipeline in an embodiment of the present invention comprises: a potential difference measuring instrument body 1, a lifting and lowering wetting device 2, a compression drilling mechanism 3, a transmission power mechanism 4 and a toggle water blocking mechanism 5.

[0047] like Figure 1 As shown, ground contact detection connectors 101 are installed on both sides of the potential difference measuring instrument body 1, a display screen 102 is fixedly installed on the upper side of the potential difference measuring instrument body 1, an adjustment button 103 is fixedly installed on the upper side of the potential difference measuring instrument body 1, a plurality of control knobs 104 are fixedly installed on the upper side of the potential difference measuring instrument body 1, and an installation vehicle 105 is fixedly installed on the lower side of the potential difference measuring instrument body 1, which facilitates the displacement of the potential difference measuring instrument body 1 and the installation of the wetting chamber 201.

[0048] like Figures 1 to 4 As shown, a lifting type soaking device 2 is fixedly installed on the upper side of the installation vehicle 105 for moistening the land, wherein the lifting type soaking device 2 includes a soaking bin 201, which facilitates the storage of water so that the water can better soak the soil.

[0049] Among them, a soaking lifting plate 202 is slidably installed in the soaking bin 201, which can drive the soaking lifting bin 203 to rise and fall, and at the same time can divide the space in the soaking bin 201.

[0050] In addition, a soaking and lifting chamber 203 is rotatably mounted on the soaking and lifting plate 202, which can contain moisture and soak the soil.

[0051] Optionally, a soaking conveying member 204 is fixedly installed on the outer side of the soaking lifting chamber 203, which can convey the soil in the drill hole out so that the soil will not remain in the drill hole, making drilling more convenient.

[0052] like Figures 1 to 4 As shown, a soaking sealing ring 205 is provided between the soaking bin 201 and the soaking lifting plate 202 , which improves the sealing between the soaking bin 201 and the soaking lifting plate 202 and reduces the possibility of water leakage above the soaking lifting plate 202 .

[0053] Among them, the wetting sealing ring 205 is fixedly connected to the wetting lifting plate 202, which facilitates the installation of the wetting sealing ring 205. When the wetting chamber 201 and the wetting lifting plate 202 slide against each other, the probability of the wetting sealing ring 205 falling off can be reduced, so that the stability of the wetting sealing ring 205 is improved.

[0054] In addition, the soaking and lifting chamber 203 is arranged to penetrate the soaking and lifting chamber 201, the soaking and lifting plate 202 and the installation vehicle 105, which facilitates the lifting and lowering of the soaking and lifting chamber 203 and enables the compression drill bit 304 to drill holes in the ground more conveniently.

[0055] Optionally, a soaking clamp 206 is rotatably installed on the upper side of the soaking lifting bin 203, which can fix the soaking lifting bin 203 on the soaking lifting plate 202, so that the lifting and lowering of the soaking lifting plate 202 can drive the displacement of the soaking lifting bin 203, so that the soaking lifting bin 203 can better penetrate into the soil hole.

[0056] like Figures 1 to 6 As shown, the wetting clamp 206 is fixedly connected to the wetting lifting plate 202 , which facilitates the installation of the wetting clamp 206 , improves the stability of the wetting clamp 206 , and enables the wetting clamp 206 to better engage with the wetting lifting bin 203 .

[0057] In addition, a soaking water pump 207 is fixedly installed on the upper side of the soaking clamp 206, which can extract the moisture in the soaking bin 201 and inject the moisture in the soaking lifting bin 203 to provide moisture for the soaking of the soil. The soaking water pump 207 is set through the soaking clamp 206.

[0058] like Figures 1 to 6As shown, a pair of soaking electric telescopic rods 208 are fixedly installed between the soaking bin 201 and the soaking lifting plate 202, which can drive the soaking lifting bin 203 to rise and fall, so that the rising and falling of the soaking lifting bin 203 can be controlled.

[0059] Optionally, a plurality of pairs of soaking and seepage nets 209 are fixedly installed on the soaking and lifting chamber 203, which facilitates the seepage of water so that the water can soak the soil. A plurality of seepage grooves matching the plurality of pairs of soaking and seepage nets 209 are opened on the soaking and lifting chamber 203, which facilitates the installation of the soaking and seepage nets 209 and improves the stability of the soaking and seepage nets 209.

[0060] like Figures 1 to 7 As shown, a compression drilling mechanism 3 is fixedly connected to the soaking and lifting chamber 203 for drilling holes in the ground, wherein the compression drilling mechanism 3 includes a compression motor 301, which can drive the rotation of the compression drill bit 304, providing corresponding power for the compression drill bit 304 to drill holes.

[0061] In addition, a compression baffle plate 302 is provided on the upper side of the compression motor 301 to isolate the moisture soaking in the lifting chamber 203, thereby increasing the service life of the compression motor 301.

[0062] Optionally, a compression bearing 303 is fixedly installed between the compression motor 301 and the soaking lifting chamber 203, which reduces the friction between the compression motor 301 and the soaking lifting chamber 203 and increases the service life of the compression motor 301.

[0063] like Figures 1 to 7 As shown, the compression baffle plate 302 is fixedly connected to the soaking lift chamber 203, which reduces the damage of moisture to the compression motor 301, increases the service life of the compression motor 301, and improves the stability of the compression motor 301. The compression motor 301 is set throughout the soaking lift chamber 203.

[0064] In addition, a compression drill bit 304 is fixedly installed on the lower side of the compression motor 301, which can drill holes in the soil so that water can better penetrate deep into the soil.

[0065] like Figures 1 to 5 As shown, a transmission power mechanism 4 is fixedly installed on the upper side of the soaking and lifting plate 202, which is used to drive the rotation of the soaking and lifting bin 203. The transmission power mechanism 4 includes a transmission motor 401, which can drive the rotation of the transmission active pulley 403, and provide corresponding power for the rotation of the soaking and lifting bin 203. The transmission motor 401 is set throughout the soaking and lifting plate 202.

[0066] Among them, a transmission bearing 402 is fixedly installed between the transmission motor 401 and the soaking lifting plate 202, which facilitates the rotation of the transmission motor 401 and reduces the friction between the transmission motor 401 and the soaking lifting plate 202.

[0067] In addition, a driving pulley 403 is fixedly installed on the lower side of the driving motor 401, which can drive the rotation of the driven pulley 404 through the transmission of the transmission belt 405, so that the driven pulley 404 can drive the rotation of the soaking and lifting bin 203.

[0068] like Figures 1 to 4 As shown, a driven pulley 404 is fixedly installed on the outer side of the soaking and lifting bin 203 , and can be rotated by a transmission belt 405 , and a transmission belt 405 is fixedly installed between the driving pulley 403 and the driven pulley 404 .

[0069] like Figures 1 to 8 As shown, a toggle type water blocking mechanism 5 is fixedly installed on the lower side of the soaking bin 201 for pushing away the drilled soil, wherein the toggle type water blocking mechanism 5 includes a toggle support ring 501, which can fix the position of the toggle driven friction wheel 502, thereby improving the stability of the toggle driven friction wheel 502.

[0070] In addition, a driven friction wheel 502 is rotatably mounted on the outer side of the toggle support ring 501 , which can fix the toggle arc piece 503 through the toggle positioning ring 504 and drive the rotation of the toggle arc piece 503 .

[0071] In addition, a plurality of arc pieces 503 are provided on the lower side of the driven friction wheel 502, which can push away the soil so that the soil will not affect the drilling and will not cause water waste.

[0072] like Figures 1 to 7 As shown, a plurality of tossing arc pieces 503 are each fixedly provided with a tossing positioning ring 504 between the tossing driven friction wheel 502 , which can fix the position of the tossing arc piece 503 , so that the tossing arc piece 503 can better toss the soil.

[0073] Among them, a toggle synchronization rod 505 is fixedly installed on the soaking chamber 201, which facilitates the installation of the toggle synchronization friction wheel 506, improves the stability of the toggle synchronization friction wheel 506, and synchronizes the rotation of a pair of toggle synchronization friction wheels 506. The toggle synchronization rod 505 runs through the soaking chamber 201.

[0074] like Figures 1 to 8As shown, both sides of the toggle synchronization rod 505 are equipped with toggle synchronization friction wheels 506, which can be driven by the toggle active friction wheel 507, so that the toggle driven friction wheel 502 can drive the toggle arc piece 503 to rotate, and the toggle active friction wheel 507 is fixedly installed on the lower side of the transmission driven leather wheel 404, and the toggle active friction wheel 507 matches the toggle synchronization friction wheel 506.

[0075] The present invention also provides a method for detecting a natural gas pipeline leak, comprising the following steps:

[0076] S1. Drag the installation vehicle 105 to the top of the measuring point, and control the expansion and contraction of the electric telescopic rod 208 to drive the expansion and contraction of the lifting and lowering chamber 203.

[0077] S2. When the compression drill bit 304 contacts the ground, the compression motor 301 is turned on to rotate the compression drill bit 304 to drill the ground.

[0078] S3, synchronously start the transmission motor 401, so that the transmission driven pulley 404 drives the rotation of the soaking and lifting chamber 203, and transports the soil to the ground through the soaking conveying member 204.

[0079] S4. The soaking water pump 207 extracts the water in the soaking bin 201 and injects it into the soaking lifting bin 203, so that the water penetrates into the soil from the soaking seepage net 209.

[0080] S5. When the soaking lifting chamber 203 penetrates deep into the ground, the active friction wheel 507 will come into contact with the synchronous friction wheel 506. Under the influence of friction, the synchronous friction wheel 506 will drive the rotation of the supporting ring 501, thereby causing the arc piece 503 to rotate.

[0081] S6. The continuous rotation of the arc piece 503 can push away the soil, thereby reducing the waste of water and preventing the water from soaking the pushed soil.

[0082] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for detecting leakage in a natural gas pipeline, comprising a potential difference measuring instrument body (1), wherein ground contact detection joints (101) are respectively installed on both sides of the potential difference measuring instrument body (1), a display screen (102) is fixedly installed on the upper side of the potential difference measuring instrument body (1), an adjustment button (103) is fixedly installed on the upper side of the potential difference measuring instrument body (1), and a plurality of control knobs (104) are fixedly installed on the upper side of the potential difference measuring instrument body (1), characterized in that: A mounting vehicle (105) is fixedly mounted on the lower side of the potential difference measuring instrument body (1), and a lifting type wetting device (2) is fixedly mounted on the upper side of the mounting vehicle (105) for wetting the ground. The lifting type wetting device (2) comprises a wetting bin (201), a wetting lifting plate (202) is slidably mounted in the wetting bin (201), a wetting lifting bin (203) is rotatably mounted on the wetting lifting plate (202), a wetting conveying member (204) is fixedly mounted on the outer side of the wetting lifting bin (203), a compression drilling mechanism (3) is fixedly connected to the wetting lifting bin (203) for drilling the ground, and the compression drilling mechanism (3) comprises a compression motor (301), and the A compression baffle plate (302) is provided on the upper side of the compression motor (301); a compression bearing (303) is fixedly installed between the compression motor (301) and the soaking and lifting chamber (203); a transmission power mechanism (4) is fixedly installed on the upper side of the soaking and lifting chamber (203) for driving the soaking and lifting chamber (203) to rotate; a toggle-type water-blocking mechanism (5) is fixedly installed on the lower side of the soaking chamber (201) for pushing away the drilled soil; the toggle-type water-blocking mechanism (5) comprises a toggle support ring (501); a toggle driven friction wheel (502) is rotatably installed on the outer side of the toggle support ring (501); and a plurality of toggle arc pieces (503) are provided on the lower side of the toggle driven friction wheel (502).

2. The device for detecting leakage of a natural gas pipeline according to claim 1, characterized in that: A soaking sealing ring (205) is provided between the soaking bin (201) and the soaking lifting plate (202), and the soaking sealing ring (205) is fixedly connected to the soaking lifting plate (202). The soaking lifting bin (203) is arranged to penetrate the soaking bin (201), the soaking lifting plate (202) and the installation vehicle (105), and a soaking engaging member (206) is rotatably installed on the upper side of the soaking lifting bin (203).

3. The device for detecting leakage of a natural gas pipeline according to claim 2, characterized in that: The soaking clamp (206) is fixedly connected to the soaking lifting plate (202), and a soaking water pump (207) is fixedly installed on the upper side of the soaking clamp (206), and the soaking water pump (207) is arranged through the soaking clamp (206).

4. The device for detecting leakage of a natural gas pipeline according to claim 3, characterized in that: A pair of soaking electric telescopic rods (208) are fixedly installed between the soaking bin (201) and the soaking lifting plate (202), a plurality of pairs of soaking water seepage nets (209) are fixedly installed on the soaking lifting bin (203), and a water seepage groove matching the plurality of pairs of soaking water seepage nets (209) is excavated on the soaking lifting bin (203).

5. The device for detecting leakage of a natural gas pipeline according to claim 1, characterized in that: The compression baffle plate (302) is fixedly connected to the soaking and lifting chamber (203), the compression motor (301) is arranged to penetrate the soaking and lifting chamber (203), and a compression drill bit (304) is fixedly installed on the lower side of the compression motor (301).

6. The device for detecting leakage of a natural gas pipeline according to claim 1, characterized in that: The transmission type power mechanism (4) comprises a transmission motor (401), the transmission motor (401) is arranged to penetrate the soaking lifting plate (202), a transmission bearing (402) is fixedly installed between the transmission motor (401) and the soaking lifting plate (202), and a transmission driving pulley (403) is fixedly installed on the lower side of the transmission motor (401).

7. The device for detecting leakage of a natural gas pipeline according to claim 6, characterized in that: A driven driving pulley (404) is fixedly installed on the outer side of the soaking lifting bin (203), and a driving belt (405) is fixedly installed between the driving driving pulley (403) and the driven driving pulley (404).

8. The device for detecting leakage of a natural gas pipeline according to claim 7, characterized in that: A toggle positioning ring (504) is fixedly installed between each of the plurality of toggle arc pieces (503) and the toggle driven friction wheel (502), and a toggle synchronization rod (505) is fixedly installed on the soaking bin (201), and the toggle synchronization rod (505) is arranged to penetrate the soaking bin (201).

9. The device for detecting leakage of a natural gas pipeline according to claim 8, characterized in that: A toggle synchronous friction wheel (506) is respectively installed on both sides of the toggle synchronous rod (505), and a toggle active friction wheel (507) is fixedly installed on the lower side of the transmission driven leather wheel (404), and the toggle active friction wheel (507) matches the toggle synchronous friction wheel (506).

10. A method for detecting leakage of a natural gas pipeline according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, dragging the installation vehicle (105) to the top of the measuring point, and controlling the expansion and contraction of the soaking electric telescopic rod (208), thereby driving the soaking lifting bin (203) to rise and fall; S2, when the compression drill bit (304) contacts the ground, the compression motor (301) is turned on to rotate the compression drill bit (304) to drill the ground; S3, synchronously starting the transmission motor (401), so that the transmission driven pulley (404) drives the rotation of the soaking and lifting bin (203), and transports the soil to the ground through the soaking and conveying member (204); S4, the soaking water pump (207) extracts the water in the soaking bin (201) and injects it into the soaking lifting bin (203), so that the water penetrates into the soil from the soaking water seepage net (209); S5. When the soaking lifting chamber (203) penetrates deep into the ground, the active friction wheel (507) contacts the synchronous friction wheel (506). Under the influence of friction, the synchronous friction wheel (506) drives the rotation of the supporting ring (501), thereby causing the arc piece (503) to rotate. S6. The continuous rotation of the arc piece (503) can remove the soil, thereby reducing the waste of water and preventing the water from soaking the removed soil.

Images