Gas leakage detection device

Abstract

The invention discloses a gas leakage detection device, and relates to the field of gas safety monitoring, the gas leakage detection device comprises multiple groups of detection device main body frames, adjusting parts, cleaning parts and driving parts, each detection device main body frame comprises a first connecting frame and a second connecting frame, and the ends, close to each other, of the first connecting frame and the second connecting frame are respectively provided with a ball seat and a ball head connecting rod; motor mounting frames are arranged at the ends, away from each other, of the first connecting frame and the second connecting frame, and first motors are mounted on one set of motor mounting frames; the infrared detection sensor is driven by the adjusting part to rotate on the outer side of the gas pipeline needing to be detected, the detection device is moved on the gas pipeline needing to be detected through cooperation with the driving part, comprehensive and rapid gas leakage detection on the gas pipeline with the large diameter is finally achieved, operation is easy and convenient, and the detection efficiency is improved. Compared with the prior art, the gas pipeline leakage detection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of gas safety monitoring, and more specifically, to a gas leakage detection device. Background Art

[0002] Gas leak detection alarm is a very important gas safety device. It is the last line of defense for the safe use of city gas. The gas leak alarm detects low-concentration combustible gas in the surrounding environment through a gas sensor, and transmits the detection signal to the controller or control circuit in analog or digital form through a sampling circuit. When the combustible gas concentration exceeds the value set in the controller or control circuit, the controller sends an alarm signal or executes actions such as closing the gas valve through an actuator or an execution circuit. However, the existing gas leak detection technology is mostly single sensor detection, such as chemical sensors or infrared sensors. Although these technologies can detect gas leaks to a certain extent, the equipment needs to be manually operated by staff during use, or due to the fixed installation of the sensor, if you want to conduct a full range of monitoring of large-diameter gas pipelines, you need to reinstall the detection equipment and the gas pipeline multiple times, which is cumbersome to operate. As a result, there is still much room for improvement in the gas detection efficiency of the gas pipeline. In addition, a single detection device is not suitable for gas pipelines of different specifications, and its usage scenarios are limited. For this reason, we designed a gas leak detection device. Summary of the invention

[0003] There is still much room for improvement in the detection efficiency of the existing technology, and a single detection device is not suitable for gas pipelines of different specifications. For open-air gas pipelines, dust may cover the gas pipelines, causing interference to the sensor's detection of the gas pipeline. The purpose of the present invention is to provide a gas leak detection device.

[0004] To solve the above problems, the present invention adopts the following technical solutions.

[0005] A gas leak detection device, comprising: a plurality of detection device main frames, an adjustment part, a cleaning part and a driving part, the detection device main frames comprising a connecting frame 1 and a connecting frame 2, the ends of the connecting frame 1 and the connecting frame 2 close to each other are respectively provided with a ball seat and a ball head connecting rod, the ends of the connecting frame 1 and the connecting frame 2 far away from each other are both provided with a motor mounting frame, one group of the motor mounting frames is equipped with a first motor, and the plurality of detection device main frames are evenly arranged with the axis of the gas pipeline as the center of the circle; The adjusting part is arranged at both ends of the main frame of the multiple detection devices, and the adjusting part includes a plurality of arc-shaped plates for further adapting to the detection of gas pipelines of different sizes and specifications to a certain extent; The cleaning parts are arranged at both ends of the main frames of the multiple detection devices, and the cleaning parts are used to prevent the influence of dust on the gas pipeline leakage detection in the open air environment; The driving part is arranged on the main frame of the detection device, and the driving part comprises a plurality of guide rollers for driving the entire detection device to move on the gas pipeline.

[0006] Furthermore, an infrared detection sensor is installed on one of the arc plates, and connecting components are respectively provided at both ends of the main frame of the detection device; a pulley is provided at the end of the connecting frame 1 away from the connecting frame 2, a first slide groove is provided at the end of the arc plate close to the connecting frame 1, and a second slide groove is provided at the other end, the pulley is arranged in the first slide groove, and a driving gear is coaxially fixedly connected to the output end of the first motor, and a plurality of evenly arranged arc plates are arranged in a disc shape, and teeth that mesh with the driving gear are provided on the outer side walls of the arc plates.

[0007] Furthermore, the connecting assembly includes a plurality of fixed cylinders, which are respectively arranged at the two ends of the connecting frame 1 and the connecting frame 2, and the telescopic connecting rod 1 and the telescopic connecting rod 2 are respectively slidably connected in the fixed cylinders located at the two ends of the connecting frame 1 and the connecting frame 2, and a first spring is provided in the fixed cylinder, one end of the first spring is fixedly connected to the inner wall of the fixed cylinder, and the other end is fixedly connected to the telescopic connecting rod 1 or the telescopic connecting rod 2.

[0008] Furthermore, the adjustment unit further includes: A plurality of arc-shaped mounting blocks are arranged between a group of arc-shaped plates that are adjacent to each other end by end, a plurality of mounting bolts are arranged on the arc-shaped mounting blocks, the arc-shaped plates are arranged in the second slide groove, and bolt mounting holes are arranged in the second slide groove, and adjacent groups of arc-shaped plates are fixedly connected by the arc-shaped mounting blocks and the mounting bolts; A limiting slide block is provided on the side wall of the arc-shaped plate, a limiting groove is provided on the inner wall of the second sliding groove, and the limiting slide block is arranged in the limiting groove.

[0009] Furthermore, the cleaning part includes a plurality of rotating rods, which are rotatably connected to a plurality of arc plates respectively, and are evenly arranged with the axis of the gas pipeline as the center of the circle, a cleaning plate is provided at one end of the rotating rod away from the arc plate, a fixing rod 1 is provided on the arc plate, a third spring is provided between the fixing rod 1 and the rotating rod, one end of the third spring is fixedly connected to the fixing rod 1, and the other end is fixedly connected to the rotating rod.

[0010] Furthermore, the driving unit further includes: A second motor is fixedly mounted on the connecting frame 1, the output end of the second motor is coaxially fixedly connected with a rotating shaft, the end of the connecting frame 1 away from the second motor is rotatably connected with a rotating column, the rotating shaft is rotatably connected with the rotating column, the end of the rotating column away from the rotating shaft is rotatably connected with the rotating shaft, the guide roller is coaxially fixedly connected with the rotating shaft, the rotating shaft and the rotating shaft are both provided with pulleys, and the same belt is wound around a pair of the pulleys; One end of the connecting frame 1 away from the second motor is fixedly connected to the fixing rod 2, a fourth spring is arranged between the fixing rod 2 and the rotating column, one end of the fourth spring is fixedly connected to the fixing rod 2, and the other end is fixedly connected to the rotating column.

[0011] Furthermore, the ends of the connecting frame 1 and the connecting frame 2 that are close to each other are connected through a ball seat and a ball head connecting rod ball joint respectively.

[0012] Furthermore, the arc plate is provided with mounting grooves at both ends, a second spring is fixedly connected in the mounting groove at one end of the arc plate, a clamping block is fixedly connected to one end of the second spring away from the inner wall of the mounting groove, and a clamping groove is opened at the other end of the arc plate, and the clamping block is arranged in the clamping groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present application drives the infrared detection sensor to rotate on the outside of the gas pipeline to be detected through the adjustment part, and then moves the detection device on the gas pipeline to be detected through cooperation with the driving part, thereby finally realizing comprehensive and rapid gas leakage detection for gas pipelines with larger diameters. The operation is simple and convenient, and multiple reinstallation is not required. Compared with the existing technology, the detection efficiency of gas pipeline leakage is greatly improved.

[0014] (2) In the present application, the guide roller is rotatably connected to the end of the rotating column away from the connecting frame 1 through a rotating shaft. Because the rotating column and the fixed rod 2 are connected through a fourth spring, the guide roller is in close contact with the gas pipeline to be detected, and is suitable for gas pipelines of different specifications. Due to the setting of the adjustment part, the arc-shaped mounting block and the adjacent arc-shaped plate are assembled by mounting bolts, which is convenient for installation and disassembly. In addition, the detection device can realize leakage detection of the gas pipeline on the curved pipeline, and has a wide range of applications.

[0015] (3) In this application, when the driving unit drives the regulating unit to rotate the gas pipeline to be inspected, the gas around the pipeline is stirred under the action of centrifugal force. After the outer wall of the pipeline is cleaned by the cleaning machine unit, the leakage point of the gas pipeline is accurately located according to the continuous detection results of the infrared detection sensor, thereby ensuring the accuracy of the infrared detection sensor in detecting the surface of the gas pipeline and detecting gas leaks in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic diagram of the overall structure of a gas leak detection device provided in an embodiment of the present application; Figure 2 A side view of a gas leak detection device provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of an adjustment part of a gas leak detection device provided in an embodiment of the present application; Figure 4 A schematic diagram of the driving structure of a gas leak detection device provided in an embodiment of the present application Figure 1 ; Figure 5 A schematic diagram of the driving structure of a gas leak detection device provided in an embodiment of the present application Figure 2 ; Figure 6 A schematic diagram of the main frame connection structure of a gas leak detection device provided in an embodiment of the present application; Figure 7 A schematic diagram of the main frame assembly structure of a gas leak detection device provided in an embodiment of the present application.

[0017] Description of the numbers in the figure: 1. Main frame of the detection device; 11. Connecting frame 1; 111. Ball seat; 12. Connecting frame 2; 121. Ball head connecting rod; 13. Motor mounting frame; 131. First motor; 1311. Driving gear; 14. Pulley; 15. Fixed cylinder; 16. Telescopic connecting rod 1; 17. First spring; 18. Telescopic connecting rod 2; 2. Adjustment part; 21. Arc plate; 211. First slide groove; 212. Second slide groove; 213. Mounting groove; 214. Block; 215. Second spring; 22. Arc mounting block; 221. Mounting bolt; 23. Bolt mounting hole; 3. Cleaning unit; 31. Rotating rod; 311. Cleaning plate; 32. Fixed rod 1; 33. Third spring; 4. driving unit; 41. second motor; 411. rotating shaft; 412. rotating column; 42. guide roller; 43. second fixing rod; 44. fourth spring; 5. Infrared detection sensor. DETAILED DESCRIPTION

[0018] 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; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0019] Example 1, please refer to Figures 1 to 7 , which is the first embodiment of the present invention, and provides a gas leak detection device, which includes: a plurality of detection device main frame 1, an adjustment part 2, a cleaning part 3 and a driving part 4, the detection device main frame 1 includes a connecting frame 11 and a connecting frame 2 12, the ends of the connecting frame 11 and the connecting frame 2 12 close to each other are respectively provided with a ball seat 111 and a ball head connecting rod 121, and the ends of the connecting frame 11 and the connecting frame 2 12 close to each other are respectively connected by ball joints through the ball seat 111 and the ball head connecting rod 121; Usage process: When the driving unit 4 drives the detection device to move on the pipeline of the gas to be leaked, the cleaning unit 3 performs pretreatment, and the ends of the connecting frame 11 and the connecting frame 2 12 close to each other are connected by ball joints through the ball seat 111 and the ball head connecting rod 121, respectively, so that the detection device can realize the leakage detection of the gas pipeline on the curved pipeline, and has a wide range of application; A motor mounting frame 13 is provided at one end of the connecting frame 11 and the connecting frame 2 12 which are away from each other, and a first motor 131 is installed on each of the motor mounting frames 13. The multiple groups of detection device main frames 1 are evenly arranged with the axis of the gas pipeline as the center of the circle; thus, the first motor 131 can be installed on any one of the detection device main frames 1 according to the convenience of the installation site; An infrared detection sensor 5 is installed on one of the arc plates 21, and connecting components are respectively provided at both ends of the main frame 1 of the detection device; a pulley 14 is provided at one end of the connecting frame 11 away from the connecting frame 2 12, a first slide groove 211 is provided at one end of the arc plate 21 close to the connecting frame 11, and a second slide groove 212 is provided at the other end, the pulley 14 is arranged in the first slide groove 211, and a driving gear 1311 is coaxially fixedly connected to the output end of the first motor 131, and a plurality of evenly arranged arc plates 21 are arranged in a disc shape, and teeth that mesh with the driving gear 1311 are provided on the outer wall of the arc plate 21; The output end of the first motor 131 drives the driving gear 1311 to rotate, so that the driving gear 1311 meshes with the teeth on the disk composed of multiple groups of arc plates 21, so that the disk drives the infrared detection sensor 5 to rotate on the outside of the gas pipeline to be detected, and then through cooperation with the driving part 4, the detection device is moved on the gas pipeline to be detected, and finally a comprehensive and rapid gas leakage detection of the gas pipeline is realized, and the operation is simple and convenient.

[0020] The connecting assembly includes a plurality of fixed cylinders 15, and the plurality of fixed cylinders 15 are respectively arranged at the two ends of the connecting frame 11 and the connecting frame 2 12, and a telescopic connecting rod 16 and a telescopic connecting rod 2 18 are respectively slidably connected in the fixed cylinders 15 located at the two ends of the connecting frame 11 and the connecting frame 2 12, and a first spring 17 is arranged in the fixed cylinder 15, one end of the first spring 17 is fixedly connected to the inner wall of the fixed cylinder 15, and the other end is fixedly connected to the telescopic connecting rod 16 or the telescopic connecting rod 2 18. The connecting assembly is convenient for assembling multiple groups of detection device main frames 1. At the same time, since the fixed cylinder 15 is elastically connected to the telescopic connecting rod 1 16 or the telescopic connecting rod 2 18 through the first spring 17, the multiple groups of detection device main frames 1 have size adjustability.

[0021] Embodiment 2, as Figures 1 to 3 FIG. 2 is a second embodiment of the present invention. Different from the previous embodiment, this embodiment provides an adjusting part 2 of a gas leakage detection device. The adjusting part 2 is arranged at both ends of the main frame 1 of the plurality of detection devices. The adjusting part 2 includes a plurality of arc plates 21 for further adapting to the detection of gas pipelines of different sizes to a certain extent. The adjusting part 2 also includes: A plurality of arc-shaped mounting blocks 22 are arranged between a group of arc-shaped plates 21 which are adjacent to each other in sequence. A plurality of mounting bolts 221 are arranged on the arc-shaped mounting blocks 22. The arc-shaped plates 21 are arranged in the second slide grooves 212. Bolt mounting holes 23 are provided in the second slide grooves 212. Adjacent groups of arc-shaped plates 21 are fixedly connected by the arc-shaped mounting blocks 22 and the mounting bolts 221. A limit slider is provided on the side wall of the arc-shaped plate 21, and a limit groove is provided on the inner wall of the second slide groove 212, and the limit slider is arranged in the limit groove; The arc plate 21 is provided with mounting grooves 213 at both ends. A second spring 215 is fixedly connected in the mounting groove 213 at one end of the arc plate 21. A clamping block 214 is fixedly connected to one end of the second spring 215 away from the inner wall of the mounting groove 213. A clamping groove is provided at the other end of the arc plate 21. The clamping block 214 is arranged in the clamping groove. Usage process: remove the mounting bolts 221 between the arc-shaped mounting block 22 and the adjacent arc-shaped plate 21. The usage process is to first fix a set of installed detection device main frame 1 above the gas pipeline, and then adjust the mounting bolts 221 on the arc-shaped mounting block 22 and the different bolt mounting holes 23 on the adjacent mounting arc-shaped plate 21 according to the specifications of the gas pipeline to be detected, so that the device can further adapt to gas pipelines of different sizes to a certain extent. At the same time, the assembled structure is suitable for the installation scenario of the pipeline that has been installed and put into use.

[0022] Embodiment 3, as Figures 2 to 5FIG. 4 is a third embodiment of the present invention. Different from the previous embodiment, this embodiment provides a driving unit 4 of a gas leakage detection device. The driving unit 4 is arranged on the main frame 1 of the detection device. The driving unit 4 includes a plurality of guide rollers 42 for driving the entire detection device to move on the gas pipeline. The driving unit 4 also includes: A second motor 41 is fixedly mounted on the connecting frame 11, the output end of the second motor 41 is coaxially fixedly connected with a rotating shaft 411, one end of the connecting frame 11 away from the second motor 41 is rotatably connected with a rotating column 412, the rotating shaft 411 is rotatably connected to the rotating column 412, one end of the rotating column 412 away from the rotating shaft 411 is rotatably connected to the rotating shaft, the guide roller 42 is coaxially fixedly connected with the rotating shaft, the rotating shaft and the rotating shaft 411 are both provided with pulleys, and the same belt is wound around a pair of pulleys; One end of the connecting frame 11 away from the second motor 41 is fixedly connected to the second fixing rod 43, and a fourth spring 44 is provided between the second fixing rod 43 and the rotating column 412. One end of the fourth spring 44 is fixedly connected to the second fixing rod 43, and the other end is fixedly connected to the rotating column 412. Usage process: Since the rotating column 412 is rotatably connected to the connecting frame 1 11 or the connecting frame 2 12, the guide roller 42 is rotatably connected to the end of the rotating column 412 away from the connecting frame 1 11 through the rotating shaft. Since the rotating column 412 is connected to the fixed rod 2 43 through the fourth spring 44, the guide roller 42 is in close contact with the gas pipeline to be detected. The rotating shaft 411 is rotatably connected to the rotating column 412, and the rotating shaft 411 and the rotating shaft are transmitted through a belt and a pulley. When the output end of the second motor 41 drives the rotating shaft 411 to rotate, the guide roller 42 close to the gas pipeline to be inspected rolls on the side wall of the gas pipeline, thereby driving the entire detection device to move on the gas pipeline.

[0023] Embodiment 4, as Figure 1 and Figure 6 As shown, it is the fourth embodiment of the present invention. Different from the previous embodiment, this embodiment provides a cleaning part 3 of a gas leakage detection device. The cleaning part 3 is arranged at both ends of the main frame 1 of the multiple detection device groups. The cleaning part 3 is used to prevent the influence of dust on the gas pipeline leakage detection in an open air environment; The cleaning part 3 includes a plurality of rotating rods 31, which are rotatably connected to the plurality of arc-shaped plates 21 respectively, and the plurality of rotating rods 31 are evenly arranged with the axis of the gas pipeline as the center of the circle, and a cleaning plate 311 is provided at one end of the rotating rod 31 away from the arc-shaped plate 21, and a fixing rod 32 is provided on the arc-shaped plate 21, and a third spring 33 is provided between the fixing rod 32 and the rotating rod 31, and one end of the third spring 33 is fixedly connected to the fixing rod 32, and the other end is fixedly connected to the rotating rod 31; Usage process: Since the rotating rod 31 is rotatably connected to the arc plate 21, the cleaning plate 311 or the replacement cleaning roller is located on the inner side of the arc plate 21, and the rotating rod 31 is connected to the fixed rod 32 by the third spring 33. When the disc composed of multiple groups of arc plates 21 rotates, multiple cleaning plates 311 or the replacement cleaning rollers are tightly attached to the side wall of the gas pipeline to be detected and brush off the dust on its surface, which is suitable for cleaning gas pipelines of different specifications; it avoids interference with the sensor's detection of the gas pipeline due to dust covering the open-air gas pipeline, ensures the accuracy of the infrared detection sensor 5 in detecting the surface of the gas pipeline, and detects gas leaks in time, thereby avoiding serious accidents.

[0024] From the above, we can see that the working principle of this application is as follows: First, the mounting bolts 221 between the arc-shaped mounting block 22 and the adjacent arc-shaped plate 21 are removed. During use, a set of installed detection device main frame 1 is first fixed above the gas pipeline, and then the mounting bolts 221 on the arc-shaped mounting block 22 and the different bolt mounting holes 23 on the adjacent mounting arc-shaped plate 21 are adjusted according to the specifications of the gas pipeline to be detected, so that the assembled structure of the device is suitable for the installation scene of the pipeline that has been installed and put into use; Since multiple groups of detection device main frames 1 are evenly arranged on the outside of the gas pipeline to be detected with the axis of the gas pipeline as the center of the circle, the first motor 131 can be installed on any one of the detection device main frames 1 according to the convenience of the installation site; the output end of the first motor 131 drives the active gear 1311 to rotate, so that the active gear 1311 is meshed with the teeth on the disk composed of multiple groups of arc plates 21, so that the disk drives the infrared detection sensor 5 to rotate on the outside of the gas pipeline to be detected, and then the detection device is moved on the gas pipeline to be detected by cooperating with the driving part 4, and finally a comprehensive and rapid gas leakage detection of a gas pipeline with a larger diameter is realized; The cleaning part 3 and the driving part 4 are both flexibly arranged on the main frame 1 of the detection device, and are suitable for operating gas pipelines of different specifications; Since the rotating column 412 is rotatably connected to the connecting frame 11 or the connecting frame 2 12, the guide roller 42 is rotatably connected to the end of the rotating column 412 away from the connecting frame 11 through the rotating shaft, and since the rotating column 412 is connected to the fixed rod 2 43 through the fourth spring 44, the guide roller 42 is in close contact with the gas pipeline to be detected; and the rotating shaft 411 is rotatably connected to the rotating column 412, and the rotating shaft 411 and the rotating shaft are driven by a belt and a pulley, when the output end of the second motor 41 drives the rotating shaft 411 to rotate, the guide roller 42 in close contact with the gas pipeline to be detected rolls on the side wall of the gas pipeline, thereby driving the entire detection device to move on the gas pipeline; Since the rotating rod 31 is rotatably connected to the arc plate 21, the cleaning plate 311 or the cleaning roller installed in place is located inside the arc plate 21, and the rotating rod 31 is connected to the fixed rod 32 via the third spring 33, when the disc composed of multiple groups of arc plates 21 rotates, the multiple cleaning plates 311 or the cleaning roller installed in place closely adhere to the side wall of the gas pipeline to be inspected and brush off the dust on its surface, which is suitable for cleaning gas pipelines of different specifications; When the driving unit drives the regulating unit to rotate the gas pipeline to be inspected, the gas around the pipeline is stirred under the action of centrifugal force. After the outer wall of the pipeline is cleaned by the cleaning machine unit, the leakage point of the gas pipeline is accurately located according to the continuous detection results of the infrared detection sensor, ensuring the accuracy of the infrared detection sensor in detecting the surface of the gas pipeline and timely discovering gas leaks.

[0025] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas leak detection device, characterized in that: include: A plurality of detection device main frames (1), adjustment parts (2), cleaning parts (3) and driving parts (4), wherein the detection device main frames (1) comprise a first connecting frame (11) and a second connecting frame (12), wherein the ends of the first connecting frame (11) and the second connecting frame (12) close to each other are respectively provided with a ball seat (111) and a ball head connecting rod (121), and the ends of the first connecting frame (11) and the second connecting frame (12) far from each other are both provided with a motor mounting frame (13), wherein a first motor (131) is mounted on one group of the motor mounting frames (13), and the plurality of detection device main frames (1) are evenly arranged with the axis of the gas pipeline as the center of the circle; The adjusting part (2) is arranged at two ends of the main frame (1) of the plurality of detection devices, and the adjusting part (2) comprises a plurality of arc-shaped plates (21) for detecting gas pipelines of different sizes and specifications; The cleaning parts (3) are arranged at both ends of the main frames (1) of the multiple detection devices, and the cleaning parts (3) are used to prevent dust in an open air environment from affecting gas pipeline leakage detection; The driving part (4) is arranged on a main frame (1) of the detection device, and the driving part (4) comprises a plurality of guide rollers (42) for driving the entire detection device to move on the gas pipeline.

2. A gas leak detection device according to claim 1, characterized in that: An infrared detection sensor (5) is mounted on one of the arc-shaped plates (21), and connecting components are respectively provided at both ends of the main frame (1) of the detection device; a pulley (14) is provided at one end of the connecting frame 1 (11) away from the connecting frame 2 (12); a first slide groove (211) is provided at one end of the arc-shaped plate (21) close to the connecting frame 1 (11), and a second slide groove (212) is provided at the other end; the pulley (14) is arranged in the first slide groove (211); an output end of the first motor (131) is coaxially fixedly connected to a driving gear (1311); a plurality of evenly arranged arc-shaped plates (21) are arranged in a disc shape, and teeth adapted to mesh with the driving gear (1311) are provided on the outer wall of the arc-shaped plate (21).

3. A gas leak detection device according to claim 2, characterized in that: The connection assembly comprises a plurality of fixed cylinders (15), the plurality of fixed cylinders (15) being respectively arranged at two ends of the first connection frame (11) and the second connection frame (12), a telescopic connecting rod (16) and a telescopic connecting rod (18) being slidably connected in the fixed cylinders (15) at the two ends of the first connection frame (11) and the second connection frame (12), a first spring (17) being arranged in the fixed cylinder (15), one end of the first spring (17) being fixedly connected to the inner wall of the fixed cylinder (15), and the other end of the first spring (17) being fixedly connected to the first telescopic connecting rod (16) or the second telescopic connecting rod (18).

4. A gas leak detection device according to claim 2, characterized in that: The adjustment unit (2) further comprises: A plurality of arc-shaped mounting blocks (22) are arranged between a group of arc-shaped plates (21) that are adjacent to each other end to end, a plurality of mounting bolts (221) are arranged on the arc-shaped mounting blocks (22), the arc-shaped plates (21) are arranged in a second slide groove (212), and a bolt mounting hole (23) is provided in the second slide groove (212), and adjacent groups of arc-shaped plates (21) are fixedly connected by the arc-shaped mounting blocks (22) and the mounting bolts (221); A limiting slide block is provided on the side wall of the arc-shaped plate (21), a limiting groove is provided on the inner wall of the second slide groove (212), and the limiting slide block is arranged in the limiting groove.

5. A gas leak detection device according to claim 1, characterized in that: The cleaning portion (3) comprises a plurality of rotating rods (31), the plurality of rotating rods (31) being rotatably connected to the plurality of arc-shaped plates (21) respectively, and the plurality of rotating rods (31) being evenly arranged with the axis of the gas pipeline as the center of a circle, a cleaning plate (311) being provided at one end of the rotating rod (31) away from the arc-shaped plate (21), a fixing rod 1 (32) being provided on the arc-shaped plate (21), a third spring (33) being provided between the fixing rod 1 (32) and the rotating rod (31), one end of the third spring (33) being fixedly connected to the fixing rod 1 (32), and the other end of the third spring (33) being fixedly connected to the rotating rod (31).

6. A gas leak detection device according to any one of claims 1 to 5, characterized in that: The driving unit (4) further comprises: A second motor (41) is fixedly mounted on the first connecting frame (11), the output end of the second motor (41) is coaxially fixedly connected to a rotating shaft (411), one end of the first connecting frame (11) away from the second motor (41) is rotatably connected to a rotating column (412), the rotating shaft (411) is rotatably connected to the rotating column (412), one end of the rotating column (412) away from the rotating shaft (411) is rotatably connected to the rotating shaft, the guide roller (42) is coaxially fixedly connected to the rotating shaft, the rotating shaft and the rotating shaft (411) are both provided with pulleys, and a same belt is wound around a pair of the pulleys; One end of the connecting frame 1 (11) away from the second motor (41) is fixedly connected to a fixing rod 2 (43), a fourth spring (44) is provided between the fixing rod 2 (43) and the rotating column (412), one end of the fourth spring (44) is fixedly connected to the fixing rod 2 (43), and the other end is fixedly connected to the rotating column (412).

7. A gas leak detection device according to claim 6, characterized in that: The ends of the connecting frame 1 (11) and the connecting frame 2 (12) that are close to each other are connected through ball joints of a ball seat (111) and a ball head connecting rod (121).

8. A gas leak detection device according to claim 4, characterized in that: Both ends of the arc-shaped plate (21) are provided with mounting grooves (213); a second spring (215) is fixedly connected in the mounting groove (213) at one end of the arc-shaped plate (21); an end of the second spring (215) away from the inner wall of the mounting groove (213) is fixedly connected to a clamping block (214); a clamping groove is provided at the other end of the arc-shaped plate (21), and the clamping block (214) is arranged in the clamping groove.

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