Natural gas long-distance pipeline leakage detection device

Abstract

The utility model provides a natural gas long-distance pipeline leakage detection device, which comprises a through pipe, a detection ring, a power mechanism, a pair of stress discs, a brake mechanism and a plurality of rollers, the detection ring is sleeved on the through pipe, the plurality of rollers are arranged on the peripheral side of the through pipe, and the power mechanism is arranged on the detection ring. The power mechanism, the pair of stress discs and the brake mechanism are all installed in the through pipe, the power mechanism and the brake mechanism are both connected with the pair of stress discs, and the brake mechanism is arranged adjacent to the multiple rolling wheels.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas transportation technical field especially relates to a natural gas long -distance pipeline leak detection device. BACKGROUND

[0002] Natural gas transportation refers to one of fossil energy transportation components, and the main form is pipeline transportation, and natural gas pipeline construction is one of main projects of natural gas development, in natural gas exporting country, natural gas is transported to export port through pipeline, is processed into liquefied natural gas in port, is transported to import dedicated wharf of importing country through dedicated liquefied natural gas transport ship, is converted into gaseous natural gas through conversion station constructed near port, and is distributed to each user through pipeline again;

[0003] The prior art "CN201820205277.1 - a natural gas pipeline leak detection device", in this technology, discloses "a base, the top of the base is fixedly installed with support rods, the number of support rods is four, and the four support rods are symmetrical about the axis of the base, a detection tube is arranged between the four support rods, fixed rods are fixedly installed on the front and back sides of the detection tube, and lock nuts are threadedly connected to the other ends of the four fixed rods and extend to the outside of one side of the four support rods. The natural gas pipeline leak detection device, by cooperation of the sealing gasket and the locking screw, the sealing property of the detection tube is improved, so that the clean water injected from the water injection pipe is in the inside of the detection tube for a long time, and the water is connected to the natural gas conveying pipe through the water filter hole in the inner wall of the detection tube, so that the detection precision of the device for natural gas leakage is improved, and waste of natural gas caused by using ordinary detectors for detection is avoided."

[0004] Although the prior art can improve the detection precision of the device for natural gas leakage, avoid using ordinary detectors for detection, and cause waste of natural gas, but when the device detects the pipeline body, water will participate in the detection, and the residual water in the pipeline body after detection may cause corrosion of the pipeline body, further increase the risk of leakage, and also affect the service life of the pipeline body. Therefore, it is necessary to find and maintain the leakage point in time. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problem in the prior art and provides a natural gas long-distance pipeline leak detection device.

[0006] The utility model discloses a natural gas long -distance pipeline leak detection device, include: the through -and -through tube, the detection ring, the power mechanism, a pair of force disc, brake mechanism and a plurality of gyro wheel, the detection ring is equipped on the through -and -through tube, a plurality of gyro wheel is installed in the circumferential side of through -and -through tube, power mechanism, a pair of force disc and brake mechanism all are installed in the through -and -through tube, power mechanism and brake mechanism all are connected with a pair of force disc, brake mechanism is adjacent a plurality of gyro wheel and sets up.

[0007] The utility model discloses the beneficial effect who adopts technical scheme is: force disc will drive through -and -through tube to produce the movement in the inside of pipeline body under the flow of gas, and gyro wheel will produce the rolling friction between pipeline body, make through -and -through tube's movement more convenient. Through -and -through tube will drive detection ring synchronous movement, and detection ring will carry out the air pressure detection to the inner wall of pipeline body in this process. Through the work of through -and -through tube and force disc can drive through -and -through tube and detection ring to move in the inside of pipeline body in the flow process of natural gas, and in this process, do not need additional power output, reduced the consumption of energy. It is convenient for timely discovery leak point and maintenance to leak point.

[0008] Further, the power mechanism includes: a hydraulic rod and a pair of transmission rods, one end of the hydraulic rod is installed on the inner wall of the through -and -through tube, one end of the pair of transmission rods is hinged to the other end of the hydraulic rod, and the other end of the pair of transmission rods is hinged to the pair of force discs one by one.

[0009] The beneficial effect of the above further technical scheme is: when the detection ring moves to the leakage point, the detection ring will feel the change of air pressure, and then transmit the data to the hydraulic rod. At this time, the hydraulic rod will push the transmission rod, and the two ends of the transmission rod will rotate with the hydraulic rod and the force disc respectively. The transmission rod will push the force disc and the brake frame to move under the gradual movement of the hydraulic rod. The brake frame slides along the guide bar to make its displacement direction more stable. When the brake block at the end of the brake frame connects with the gyro wheel, the gyro wheel will stop moving, and the through -and -through tube and the detection ring will be stationary in the pipeline body. At this time, the worker can locate the leakage point of the pipeline body according to the position of the through -and -through tube in the pipeline body, so as to facilitate the subsequent leakage maintenance work.

[0010] Further, the hydraulic rod and the pair of transmission rods are in the shape of a "person".

[0011] The beneficial effect of the above further technical scheme is: the hydraulic rod and the transmission rod in the shape of a "person" can extend the transmission rod when the length of the hydraulic rod changes, and then can drive the force disc and the brake frame to displace, so as to realize the braking effect of the through -and -through tube.

[0012] Further, the brake mechanism comprises a plurality of brake frames and a plurality of brake blocks, one end of the plurality of brake frames is installed in the circumference of the force receiving disc, the other end of the plurality of brake frames penetrates through the catheter and is correspondingly adjacent to the plurality of rollers, and the plurality of brake blocks are correspondingly installed on the other end of the plurality of brake frames.

[0013] The beneficial effects of the above further technical solutions are that when a leakage position is encountered, the catheter can be flexibly braked through the working of the detection ring and the hydraulic rod, and the position of the leakage position can be located through the detection ring, so that personnel can find the leakage position, and the maintenance work is more flexible and convenient. When the detection ring moves to the leakage position, the detection ring will feel the change of the air pressure, and then the data will be transmitted to the hydraulic rod, at this time the hydraulic rod will push the transmission rod, and the two ends of the transmission rod will respectively generate rotation between the hydraulic rod and the force receiving disc. The transmission rod will push the force receiving disc and the brake frame to move under the gradual movement of the hydraulic rod, and the brake frame will slide along the guide strip to make the displacement direction more stable. When the brake block at the end of the brake frame is connected with the roller, the roller will stop moving, and the catheter and the detection ring will be stationary in the pipeline body. At this time, the personnel can locate the leakage position of the pipeline body according to the position of the catheter in the pipeline body, so as to facilitate the subsequent leakage maintenance work.

[0014] Further, a plurality of sliding grooves are arranged in the circumference of the catheter, and guide strips are installed in the sliding grooves, and the brake frames are slidably installed on the guide strips.

[0015] The beneficial effects of the above further technical solutions are that the sliding grooves are arranged to enable the brake frames to slide along the sliding grooves to realize the functions of braking and unbraking. The equiangularly arranged guide strips can form a stable sliding relationship with the brake frames, so that the movement of the brake frames is more stable, and the brake frames can stably move along the guide strips.

[0016] Further, the plurality of brake frames are symmetrically installed on the force receiving disc in a cross shape, circular through holes adapted to the guide strips are arranged on the brake frames, and the sliding grooves are rectangular sliding grooves.

[0017] The beneficial effects of the above further technical solutions are that the brake frames arranged in a cross shape can drive the connection between the brake blocks and the rollers when the brake frames drive the connection between the brake blocks and the rollers, so as to brake the rollers and the catheter. The equiangularly arranged guide strips can form a stable sliding relationship with the brake frames, so that the movement of the brake frames is more stable, and the brake frames can stably move along the guide strips.

[0018] Further, the detection ring is provided with a barometer and a GPS positioning device.

[0019] The beneficial effects of the further technical solution are that the detection ring is provided with a barometer and a GPS positioning device, which can monitor the position of the through pipe in real time and flexibly detect the leakage of the pipe body from multiple angles.

[0020] Further, the through pipe is in a cylindrical structure, and the detection ring is in a circular ring structure.

[0021] The beneficial effects of the further technical solution are that the through pipe in a cylindrical structure and the detection ring in a circular ring structure can detect the inner wall of the pipe body during the movement of the through pipe, detect the area with unstable air pressure, and brake through the hydraulic rod.

[0022] Further, the force receiving disc is in a circular structure, and the diameter of the force receiving disc is smaller than the diameter of the through pipe.

[0023] The beneficial effects of the further technical solution are that the force receiving disc in a circular structure can drive the through pipe to move along the inside of the pipe body when the gas flows in the inside of the through pipe, and then the detection ring can flexibly detect the leakage of the pipe body during the movement.

[0024] Further, a pair of the force receiving discs correspond to the two ends adjacent to the through pipe, and the power mechanism is located between the pair of the force receiving discs.

[0025] The beneficial effects of the further technical solution are that the force receiving disc can drive the through pipe to move in the inside of the pipe body under the action of the gas flow, and the roller can produce rolling friction with the pipe body, so that the movement of the through pipe is more convenient.

[0026] The advantages of the additional aspects of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure diagram of the natural gas long-distance pipeline leakage detection device provided by the present application is shown.

[0028] Figure 2The structure schematic view two of the natural gas long-distance pipeline leakage detection device is provided in the embodiment of the utility model.

[0029] Figure 3 The structure schematic view three of the natural gas long-distance pipeline leakage detection device is provided in the embodiment of the utility model.

[0030] Figure 4 The structure schematic view four of the natural gas long-distance pipeline leakage detection device is provided in the embodiment of the utility model.

[0031] The number of the drawing is explained: 1, the pipeline body, 2, the through heart tube, 3, the detection ring, 4, the hydraulic rod, 5, the transmission rod, 6, the stress disc, 7, the brake frame, 8, the guide strip, 9, the brake block, 10, the roller. Specific implementation

[0032] The principle and features of the utility model are described below in combination with the drawings, and the embodiment is only used to explain the utility model and is not used to limit the scope of the utility model.

[0033] As Figures 1 to 4 The embodiment of the utility model provides a natural gas long-distance pipeline leakage detection device, which comprises: a through heart tube 2, a detection ring 3, a power mechanism, a pair of stress discs 6, a brake mechanism and a plurality of rollers 10, the detection ring 3 is sleeved on the through heart tube 2, a plurality of the rollers 10 are installed on the circumferential side of the through heart tube 2, the power mechanism, a pair of the stress discs 6 and the brake mechanism are all installed in the through heart tube 2, the power mechanism and the brake mechanism are all connected with a pair of the stress discs 6, and the brake mechanism is adjacent to a plurality of the rollers 10.

[0034] The beneficial effects of the utility model technical scheme are: the stress disc will drive the through heart tube to move in the inside of the pipeline body under the flow action of the gas, and the roller will generate rolling friction between the pipeline body, so that the movement of the through heart tube is more convenient.The through heart tube will drive the detection ring to move synchronously, and the detection ring will detect the gas pressure of the inner wall of the pipeline body in the process.The through heart tube and the stress disc can drive the through heart tube and the detection ring to move in the inside of the pipeline body in the flow process of the natural gas, and no additional power output is needed in the process, which reduces the energy consumption.It is convenient to find and maintain the leakage point in time.

[0035] The natural gas long-distance pipeline leakage detection device can drive the detection ring and the detection tube to move in the pipeline body by the working of the detection tube and the force plate, and no additional power output is needed in the process, thereby reducing energy consumption, and when a leakage position is encountered, the detection tube can be flexibly braked by the working of the detection ring and the hydraulic rod, and the position of the detection tube is located by the detection ring, so that personnel can find the leakage position, and maintenance work is more flexible and convenient.

[0036] The detection ring and the power mechanism can be connected with a wireless transmission device, detection data of the detection ring is transmitted to a user end through the wireless transmission device, the user manually analyzes the detection data to determine whether there is leakage, if there is leakage, the user sends a braking instruction to the power mechanism through the user end, the power mechanism is started according to the braking instruction to drive the braking mechanism to brake the roller. The user maintains the pipeline leakage point according to the position of the natural gas long-distance pipeline leakage detection device.

[0037] As shown in Figures 1 to 4 Further, the power mechanism comprises a hydraulic rod 4 and a pair of transmission rods 5, one end of the hydraulic rod 4 is installed on the inner wall of the detection tube 2, one end of the pair of transmission rods 5 is hinged to the other end of the hydraulic rod 4, and the other end of the pair of transmission rods 5 is hinged to the pair of force plates 6 one by one.

[0038] The beneficial effects of the above further technical solutions are that when the detection ring moves to the leakage position, the detection ring will feel the change of the air pressure, and then transmit the data to the hydraulic rod, at this time the hydraulic rod will push the transmission rod, and the two ends of the transmission rod will rotate with the hydraulic rod and the force plate respectively, the transmission rod will push the force plate and the brake frame to move under the gradual movement of the hydraulic rod, the brake frame slides along the guide bar to make the displacement direction more stable, when the brake block at the end of the brake frame is connected with the roller, the roller will stop moving, and the detection tube and the detection ring will also be stationary in the pipeline body, at this time the personnel can locate the leakage position of the pipeline body according to the position of the detection tube in the pipeline body, so as to facilitate subsequent leakage maintenance work.

[0039] As shown in Figures 1 to 4 Further, the hydraulic rod 4 and the pair of transmission rods 5 are in a “person” shape.

[0040] The beneficial effects of the above further technical solutions are that the hydraulic rod and the transmission rod arranged in a “person” shape can drive the transmission rod to extend when the length of the hydraulic rod changes, and then can drive the force plate and the brake frame to displace, so that the braking effect on the detection tube can be achieved.

[0041] As shown in Figures 1 to 4As shown, further, the brake mechanism comprises a plurality of brake frames 7 and a plurality of brake blocks 9, one end of the plurality of brake frames 7 is installed in the circumference of the force receiving disc 6, the other end of the plurality of brake frames 7 penetrates the catheter 2 and is adjacent to the plurality of rollers 10 one by one, and the plurality of brake blocks 9 are installed on the other end of the plurality of brake frames 7 one by one.

[0042] The beneficial effects of the above further technical scheme are that when a leakage position is encountered, the catheter can be flexibly braked through the working of the detection ring and the hydraulic rod, and the position of the leakage position can be located through the detection ring, so that personnel can find the leakage position, and the maintenance work is more flexible and convenient. When the detection ring moves to the leakage position, the detection ring will feel the change of the air pressure, and then the data will be transmitted to the hydraulic rod, at this time the hydraulic rod will push the transmission rod, and the two ends of the transmission rod will also produce rotation between the hydraulic rod and the force receiving disc, respectively. The transmission rod will push the force receiving disc and the brake frame to move under the gradual movement of the hydraulic rod, and the brake frame will slide along the guide strip to make the displacement direction more stable. When the brake block at the end of the brake frame is connected with the roller, the roller will stop moving, and the catheter and the detection ring will also be stationary in the pipeline body. At this time, the personnel can locate the leakage position of the pipeline body according to the position of the catheter in the pipeline body, so as to facilitate the subsequent leakage maintenance work.

[0043] As shown in Figures 1 to 4 Further, a plurality of sliding grooves are formed in the circumference of the catheter 2, the guide strips 8 are installed in the sliding grooves, and the brake frames 7 are slidingly installed on the guide strips 8.

[0044] The beneficial effects of the above further technical scheme are that the sliding grooves are provided, so that the brake frame can slide along the sliding grooves to realize the functions of braking and unbraking. The equiangular guide strips can form a stable sliding relationship with the brake frame, so that the movement of the brake frame is more stable, and the brake frame can stably move along the guide strips.

[0045] As shown in Figures 1 to 4 Further, the plurality of brake frames 7 are symmetrically installed on the force receiving disc 6 in a cross shape, the brake frames 7 are provided with circular through holes matched with the guide strips 8, and the sliding grooves are rectangular sliding grooves.

[0046] The beneficial effect of the further technical scheme is that the brake frame in the shape of a cross can drive the connection between the brake blocks and the rollers when the brake frame drives the brake blocks and the rollers, thereby enabling the rollers and the cannula to be braked.

[0047] As shown in Figures 1 to 4 Further, the detection ring 3 is provided with a gas pressure sensor and a GPS positioning device.

[0048] The beneficial effect of the further technical scheme is that the gas pressure sensor and the GPS positioning device provided on the detection ring can monitor the position of the cannula in real time and flexibly perceive the leakage of the pipe body from multiple angles. When the leakage position is encountered, the cannula can be flexibly braked by the detection ring and the hydraulic rod, and the position of the cannula can be positioned by the detection ring, so that personnel can find the leakage position, making the maintenance work more flexible and convenient.

[0049] As shown in Figures 1 to 4 Further, the cannula 2 is in a cylindrical structure, and the detection ring 3 is in a circular ring structure.

[0050] The beneficial effect of the further technical scheme is that the cylindrical cannula and the detection ring arranged on the surface of the cannula can detect the inner wall of the pipe body during the movement of the cannula, detect the area with unstable gas pressure, and brake by the hydraulic rod.

[0051] As shown in Figures 1 to 4 Further, the force receiving disc 6 is in a circular structure, and the diameter of the force receiving disc 6 is smaller than the diameter of the cannula 2.

[0052] The beneficial effect of the further technical scheme is that the circular force receiving disc can drive the cannula to move along the inside of the pipe body when the gas flows in the inside of the cannula, thereby enabling the detection ring to flexibly detect the leakage of the pipe body during the movement.

[0053] As shown in Figures 1 to 4 Further, a pair of the force receiving discs 6 correspond to the two ends adjacent to the cannula 2, and the power mechanism is located between the pair of the force receiving discs 6.

[0054] The beneficial effects of the further technical scheme are that the stress disc is driven to move the hollow tube inside the pipeline body under the flow of the gas, and the rolling wheel generates rolling friction with the pipeline body, so that the movement of the hollow tube is more convenient. The structure is simplified, the cost is reduced, and the installation and maintenance of the natural gas long-distance pipeline leakage detection device are facilitated.

[0055] As shown in Figure 1 The natural gas long-distance pipeline leakage detection device provided by the embodiment of the utility model, which can be combined with the existing patent "CN201820205277.1 - a natural gas pipeline leakage detection device", includes a pipeline body 1. In the embodiment, the existing patent "CN201820205277.1 - a natural gas pipeline leakage detection device" discloses a natural gas conveying pipe, and the pipeline body 1 in the embodiment of the utility model adopts the same technical means in the existing patent. The technical means is not described here, and the details of the improvement of the existing technology can be referred to the patent. When the device in the existing patent detects the pipeline body 1, water is involved. Therefore, the residual water in the pipeline body 1 after the detection work may cause corrosion, further increase the risk of leakage, and also affect the service life of the pipeline body 1. In combination, this problem is obviously a real problem that is difficult to solve. In view of this, to solve the above-mentioned problems, the pipeline 2 and the detection ring 3 are added on the basis of the embodiment of the utility model.

[0056] Further, as shown in Figure 1 - Figure 4 In combination with the above content, the natural gas long-distance pipeline leakage detection device provided by the embodiment of the utility model further includes a hollow tube 2, a detection ring 3, a hydraulic rod 4, a transmission rod 5, a stress disc 6, a brake frame 7, a guide strip 8, a brake block 9 and a rolling wheel 10 arranged on one side of the pipeline body 1. The inner surface of the pipeline body 1 is provided with the hollow tube 2, and the surface of the hollow tube 2 is fixedly installed with the detection ring 3. The inner surface of the hollow tube 2 is further fixedly connected with one end of the hydraulic rod 4. The other end of the hydraulic rod 4 is rotatably connected with one end of the transmission rod 5. The other end of the transmission rod 5 is rotatably connected on the surface of the stress disc 6. One side of the stress disc 6 is further fixedly installed with the brake frame 7. The brake frame 7 is slidably connected with the guide strip 8 fixedly arranged on the surface of the hollow tube 2. The end of the brake frame 7 away from the stress disc 6 is further fixedly installed with the brake block 9 slidably connected with the rolling wheel 10. The rolling wheel 10 is fixedly installed on the surface of the hollow tube 2.

[0057] In the embodiment, when the hollow tube 2 is located inside the pipeline body 1, the natural gas is transported in the pipeline body 1, at this time, the force plate 6 is driven by the gas flow to move the hollow tube 2 in the pipeline body 1, and the roller 10 generates rolling friction with the pipeline body 1, so that the movement of the hollow tube 2 is more convenient. In the movement process of the hollow tube 2, the detection ring 3 moves synchronously, and the detection ring 3 detects the inner wall of the pipeline body 1 in the process. When the detection ring 3 moves to the leakage position, the detection ring 3 senses the change of the gas pressure, and then transmits the data to the hydraulic rod 4. At this time, the hydraulic rod 4 pushes the transmission rod 5, and the two ends of the transmission rod 5 rotate with the hydraulic rod 4 and the force plate 6 respectively. The transmission rod 5 pushes the force plate 6 and the brake frame 7 to move under the gradual movement of the hydraulic rod 4. The brake frame 7 slides along the guide strip 8 to make the displacement direction more stable. When the brake block 9 at the end of the brake frame 7 is connected with the roller 10, the roller 10 stops moving, and the hollow tube 2 and the detection ring 3 also stop moving in the pipeline body 1. At this time, the workers can locate the leakage position of the pipeline body 1 according to the position of the hollow tube 2 in the pipeline body 1, so as to facilitate the subsequent leakage maintenance work. When the leakage position is repaired, the pressure around the detection ring 3 is stable, the hydraulic rod 4 is retracted, the brake block 9 and the roller 10 are separated, and the hollow tube 2 can continue to move in the pipeline body 1 under the action of the gas flow and the force plate 6.

[0058] The detection ring and the hydraulic rod can be connected with a controller, and the control method of the controller is a prior art. Those skilled in the art can easily think of how to program the controller according to actual needs, and details are not described herein.

[0059] It should be noted that the detection ring 3 is provided with a gas pressure sensor and a GPS positioning device, which can monitor the position of the hollow tube 2 in real time and flexibly perceive the leakage position of the pipeline body 1 from multiple angles.

[0060] Further, in an optional embodiment, the hollow tube 2 is in a cylindrical shape, and the detection ring 3 is annularly arranged on the surface of the hollow tube 2.

[0061] In the embodiment, the cylindrical hollow tube 2 and the annular detection ring 3 arranged on the surface of the hollow tube 2 can detect the inner wall of the pipeline body 1 during the movement of the hollow tube 2, detect the area with unstable gas pressure, and brake through the hydraulic rod 4.

[0062] Further, in an optional embodiment, the hydraulic rod 4 and the two transmission rods 5 are arranged in a “person” shape inside the hollow tube 2.

[0063] In the embodiment, the hydraulic rod 4 and the transmission rod 5 arranged in the shape of "human" can drive the transmission rod 5 to extend when the length of the hydraulic rod 4 changes, and further drive the force receiving disc 6 and the brake frame 7 to displace, so as to realize the braking effect on the through pipe 2.

[0064] Further, in an optional embodiment, the force receiving disc 6 is circular, and the diameter of the force receiving disc 6 is smaller than the diameter of the through pipe 2.

[0065] In the embodiment, the circular force receiving disc 6 can drive the through pipe 2 to move along the inside of the pipeline body 1 when the gas flows in the inside of the through pipe 2, and further can detect the leakage of the pipeline body 1 by the detection ring 3 during the movement.

[0066] Further, in an optional embodiment, the brake frame 7 is arranged symmetrically in the shape of "cross" at both ends of the through pipe 2.

[0067] In the embodiment, the brake frame 7 arranged in the shape of "cross" can drive the brake blocks 9 and the rollers 10 to connect when the brake frame 7 drives the brake blocks 9 and the rollers 10 to connect, and further can brake the rollers 10 and the through pipe 2.

[0068] Further, in an optional embodiment, the guide strips 8 are arranged equiangularly on the through pipe 2, and the brake frame 7 is further provided with circular through holes matched with the guide strips 8.

[0069] In the embodiment, the guide strips 8 arranged equiangularly can form a stable sliding relationship with the brake frame 7, and further can make the movement of the brake frame 7 more stable, so that the brake frame 7 can move stably along the guide strips 8.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A natural gas long-distance pipeline leak detection device, characterized in that, include: The device includes a through tube, a detection ring, a power mechanism, a pair of force-receiving discs, a braking mechanism, and multiple rollers. The detection ring is sleeved on the through tube, and the multiple rollers are installed on the periphery of the through tube. The power mechanism, the pair of force-receiving discs, and the braking mechanism are all installed in the through tube. The power mechanism and the braking mechanism are all connected to the pair of force-receiving discs, and the braking mechanism is arranged adjacent to the multiple rollers.

2. The natural gas long-distance pipeline leakage detection device according to claim 1, characterized in that, The power mechanism includes a hydraulic rod and a pair of transmission rods. One end of the hydraulic rod is mounted on the inner wall of the through tube. One end of each pair of transmission rods is hinged to the other end of the hydraulic rod. The other ends of each pair of transmission rods are hinged to a pair of force-receiving discs.

3. The natural gas long-distance pipeline leakage detection device according to claim 2, characterized in that, The hydraulic rod and the pair of transmission rods are arranged in a "V" shape.

4. The natural gas long-distance pipeline leakage detection device according to claim 1, characterized in that, The braking mechanism includes: multiple brake frames and multiple brake blocks. One end of the multiple brake frames is installed in the circumferential direction of the force-receiving disc, and the other end of the multiple brake frames passes through the through tube and corresponds to the adjacent multiple rollers. The multiple brake blocks are installed at the other end of the multiple brake frames.

5. A natural gas long-distance pipeline leakage detection device according to claim 4, characterized in that, The through tube has multiple grooves circumferentially, and guide bars are installed in the grooves. The brake frame is slidably mounted on the guide bars.

6. A natural gas long-distance pipeline leakage detection device according to claim 5, characterized in that, Multiple brake frames are symmetrically mounted in a cross shape on the force-bearing plate; the brake frame is provided with a circular through hole adapted to the guide bar, and the slide groove is a rectangular slide groove.

7. A natural gas long-distance pipeline leakage detection device according to claim 1, characterized in that, The detection ring is equipped with a barometric pressure sensor and a GPS positioning system.

8. A natural gas long-distance pipeline leakage detection device according to claim 1, characterized in that, The through tube has a cylindrical structure, and the detection ring has a circular structure.

9. A natural gas long-distance pipeline leakage detection device according to claim 1, characterized in that, The force-receiving plate has a circular structure, and the diameter of the force-receiving plate is smaller than the diameter of the through tube.

10. A natural gas long-distance pipeline leakage detection device according to claim 1, characterized in that, Each pair of force-receiving discs corresponds to one end of the adjacent through tube, and the power mechanism is located between the pair of force-receiving discs.

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