Automatic sealing device with gas leakage detection function for a coiled tubing

Abstract

The application discloses an automatic plugging device with gas leakage detection function for a coiled tube, which comprises a box body, a marking device, a front-back moving device, a left-right moving device, a photoelectric position sensor, a welding device, a movable air pump and a fixed air pump. The box body is provided with a gas storage tank. The front-back moving device is connected with the box body. The left-right moving device is connected with the box body. The left-right moving device is connected with the front-back moving device. The photoelectric position sensor is connected with the box body. The movable air pump is connected with the box body. The fixed air pump is connected with the box body. The left-right moving device is connected with the marking device, the welding device and the movable air pump respectively. The marking device is connected with the box body. The gas inlet end of the fixed air pump is communicated with the pipeline of the gas storage tank. The gas outlet end of the fixed air pump is communicated with the pipeline of the coiled tube. The gas inlet end of the movable air pump is communicated with the pipeline of the gas storage tank. The gas outlet end of the movable air pump is communicated with the pipeline of the coiled tube. The leakage port is marked by the marking device, and then the welding device is used for welding the leakage port.

Description

Technical Field

[0001] This invention relates to the field of automatic sealing technology for gas leak detection, specifically an automatic sealing device for serpentine pipes with gas leak detection function. Background Technology

[0002] As one of the commonly used pipes, serpentine pipes are made of different materials depending on the application, and are mainly used to transport fluids inside the pipe.

[0003] As the service life of a serpentine tube increases, its airtightness will decrease, eventually leading to gas leaks. For transporting hazardous fluids, gas leaks in serpentine tubes are extremely dangerous. Regularly checking for gas leaks in serpentine tubes can effectively reduce the occurrence of dangerous situations. At the same time, sealing leaks in the serpentine tube to restore its airtightness is also crucial. Currently, most sealing devices with detection functions use handheld pressure detectors to detect leaks by measuring pressure changes, followed by manual welding to seal the leak. This method is costly, and with long detection times, human fatigue increases, potentially causing leaks to be missed and affecting the airtightness of the serpentine tube. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic sealing device for serpentine pipes with gas leak detection function, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] An automatic sealing device with gas leak detection function for serpentine pipes is disclosed. The device is used for leak detection and automatic sealing of serpentine pipes. The automatic sealing device includes a housing, a marking device, a front-to-back moving device, a left-to-right moving device, a photoelectric position sensor, a welding device, a mobile air pump, and a fixed air pump. The housing is equipped with a gas storage tank. There are three front-to-back moving devices, all securely connected to the housing. There are also three left-to-right moving devices, all slidably connected to the housing and securely connected to the three front-to-back moving devices respectively. The photoelectric position sensor is securely connected to the housing. The mobile air pump is slidably connected to the housing. The fixed air pump is securely connected to the housing. The three left-to-right moving devices are securely connected to the marking device, the welding device, and the mobile air pump respectively. The marking device is also securely connected to the housing. The inlet of the fixed air pump is connected to the gas storage tank pipeline, and the outlet of the fixed air pump is connected to the serpentine pipe pipeline. The inlet of the mobile air pump is connected to the gas storage tank pipeline, and the outlet of the mobile air pump is connected to the serpentine pipe pipeline.

[0007] The housing serves as the installation base for mounting other devices. One end of the serpentine tube is connected to the outlet of a fixed air pump. A forward / backward and left / right moving device connects the outlet of a mobile air pump to the end of the serpentine tube furthest from the fixed air pump, fixing the serpentine tube in its working position. Then, the forward / backward and left / right moving devices drive a marking device to spray marking material onto various locations on the serpentine tube. After spraying, both the mobile and fixed air pumps simultaneously supply nitrogen to the serpentine tube. If a leak occurs, the nitrogen exits from the leak and reacts with the marking material sprayed on the outer surface of the serpentine tube, causing a fluorescent reaction. A photoelectric position sensor detects the position of the luminescent point. The forward / backward and left / right moving devices then move a welding device to the luminescent point position, where the welding device welds the leak. After welding, all devices return to their original positions.

[0008] Furthermore, the marking device includes a spraying device, a marking steering motor, a fluorescent cylinder, a storage tank, and a pressurized air pump. The spraying device is fixedly connected to the output end of the marking steering motor, the output end of the fluorescent cylinder is fixedly connected to the marking steering motor, the fluorescent cylinder is fixedly connected to the left and right moving device, the storage tank is fixedly connected to the tank body, the storage tank is connected to the feed end pipe of the pressurized air pump, and the spraying device is connected to the discharge end pipe of the pressurized air pump.

[0009] The spraying device sprays marking material onto the serpentine tube. A fluorescent cylinder controls the up-and-down movement of the spraying device to spray marking material onto the upper and lower parts of the serpentine tube. A marking steering motor controls the forward, backward, left, and right rotation of the spraying device, allowing the spraying device to spray marking material onto the turning points of the serpentine tube. A pressurized air pump draws marking material from the storage tank and then delivers it to the spraying device, which then sprays marking material onto the serpentine tube.

[0010] Furthermore, the forward and backward moving device includes forward and backward motors, forward and backward gears, a connecting rod, and forward and backward racks. The forward and backward motors are slidably connected to the housing, the output ends of the forward and backward motors are fastened to the forward and backward gears, the forward and backward gears mesh with the forward and backward racks, the forward and backward racks are fastened to the housing, the connecting rod is rotatably connected to the forward and backward gears, and the connecting rod is fastened to the left and right moving device.

[0011] The front and rear racks are fixed to the housing, which limits the movement path of the front and rear gears. The rotation of the front and rear motors drives the front and rear gears to rotate on the front and rear racks, which in turn drives the connecting rods connected to the front and rear gears to move back and forth. The connecting rods drive the left and right moving devices to move back and forth.

[0012] Furthermore, the left and right moving device includes left and right racks, a support base, left and right gears, left and right motors, and a connecting seat. The left and right racks are slidably connected to the housing, the support base is slidably connected to the housing, the support base has an installation cavity, the installation cavity has a left and right motor, the output end of the left and right motors is fixedly connected to the left and right gears, the left and right gears mesh with the left and right racks, the connecting seat is fixedly connected to the left and right racks, and the connecting seat is fastened to the connecting rod.

[0013] The left and right motors act as drive devices, driving the left and right gears to rotate. The left and right gears mesh with the left and right racks. When the left and right gears rotate, they will move left and right, which will drive the support base to move. The connecting rod moves back and forth, which in turn drives the connecting seat to move back and forth. The back and forth movement of the connecting seat drives the left and right racks to move back and forth. The back and forth movement of the left and right racks drives the support base to move back and forth, thus realizing the back, forth, left and right movement of the support base.

[0014] Furthermore, the welding device includes a first welding plate, a second welding plate, a welding rotary motor, a clamping cylinder, a support bar, a welding base plate, a welding steering motor, a motor base plate, and a welding cylinder. The first welding plate is fastened to the output end of the clamping cylinder, the second welding plate is fastened to the output end of the welding rotary motor, the first welding plate is slidably connected to the output end of the welding rotary motor, the clamping cylinder is fastened to the output end of the welding rotary motor, the welding rotary motor is fastened to the support bar, the clamping cylinder is rotatably connected to the support bar, the support bar is fastened to the welding base plate, the welding base plate is fastened to the output end of the welding steering motor, the motor base plate is fastened to the welding steering motor, the output end of the welding cylinder is fastened to the motor base plate, and the welding cylinder is fastened to the support base.

[0015] A clamping cylinder acts as a drive device, moving the second welding plate toward the first welding plate to clamp the welding rod. A welding rotary motor controls the up-and-down rotation of the first and second welding plates, allowing the welding rod to be welded vertically. A support bar supports the position of the welding rotary motor, and a welding base plate fixes the support bar in place. A welding steering motor rotates, causing the welding base plate to rotate, thus allowing the first and second welding plates to rotate horizontally. A motor base plate is used to mount the welding steering motor. The welding cylinder controls the up-and-down movement of the device, enabling the first and second welding plates to move vertically, thereby achieving omnidirectional welding of the serpentine tube.

[0016] During welding: The welding position is located by photoelectric position sensor, and then moved to the corresponding position by forward and backward moving device and left and right moving device. The welding cylinder moves the welding rod to the corresponding height. The welding steering motor drives the welding rod to rotate left and right to the welding position. Finally, the welding rotary motor adjusts the up and down angle to send the welding rod to the welding point for welding.

[0017] Furthermore, the spraying device includes an injector, a spraying rotary motor, and a spraying support plate. The injector is fastened to the output end of the spraying rotary motor, the spraying rotary motor is fastened to the spraying support plate, the spraying support plate is fastened to the output end of the marking steering motor, and the injector is connected to a pressurized air pump pipeline.

[0018] A pressurized air pump delivers the spray material to the sprayer for spraying. The spray angle is controlled by a spray rotation motor, and the spray support plate is rotated left and right by a marking steering motor. The left and right rotation of the spray support plate causes the sprayer to rotate left and right. The spray support plate is used to fix the spray rotation motor.

[0019] During spraying: The marking device is moved to the outside and inside of the serpentine tube by the forward and backward moving device and the left and right moving device. The fluorescent cylinder sends the spraying device to the upper, middle and lower positions of the serpentine tube in sequence. Spraying is carried out at the same time as moving along the serpentine tube at these three positions. For example, when the marking device is raised to the top of the serpentine tube by the fluorescent cylinder, the spraying rotation motor is rotated downward to adjust the spraying angle of the sprayer and spray downward, thereby spraying the upper surface of the serpentine tube. At the bend of the serpentine tube, the left and right rotation angle of the sprayer is adjusted by the marking steering motor to achieve spraying at the bend of the serpentine tube.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: After the serpentine tube is installed in the working position, the forward and backward movement device and the left and right movement device control the movement of the spraying device inside and outside the serpentine tube. The fluorescent cylinder adjusts the vertical position of the spraying device relative to the serpentine tube. For example, when the spraying device is above the serpentine tube, the marking steering motor controls the spraying device to rotate left and right until the sprayer faces the serpentine tube. Then, the spraying rotation motor rotates it up and down until the sprayer is above the serpentine tube. Then, the spraying device moves along the serpentine tube and sprays the marking material at different vertical positions. This system enables more comprehensive and accurate testing. By using a mobile and a fixed air pump to deliver nitrogen into the serpentine tube, the pressure inside the tube increases, causing the nitrogen to exit from the leak point. The nitrogen exiting from the leak point reacts with the marking material to produce fluorescence. A photoelectric position sensor detects the position of the luminescent point. The forward and backward moving device and the left and right moving device drive the welding device to the position of the luminescent point. Then, the welding cylinder adjusts the position of the welding rod to the height of the leak point. The welding steering motor adjusts the welding rod to the leak point. The welding rotation motor controls the welding rod to weld up and down at the leak point, thus achieving automatic sealing of the leak. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the front and rear moving device of the present invention;

[0024] Figure 3 yes Figure 2 A magnified view of a portion of the view;

[0025] Figure 4 This is a schematic diagram of the support base structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the welding device structure of the present invention;

[0027] Figure 6 yes Figure 5 A partial zoom-in view (B) of the view;

[0028] In the diagram: 1-Box body, 2-Marking device, 21-Spraying device, 211-Sprayer, 212-Spraying rotary motor, 213-Spraying support plate, 22-Marking steering motor, 23-Fluorescent cylinder, 24-Storage box, 25-Pressure pump, 3-Front and rear moving device, 31-Front and rear motors, 32-Front and rear gears, 33-Connecting rod, 34-Front and rear racks, 4-Left and right moving device, 41-Left and right racks, 42-Support base, 43-Left and right gears, 44-Left and right motors, 45-Connecting seat, 5-Photoelectric position sensor, 6-Serpentine tube, 7-Welding device, 71-First welding plate, 72-Second welding plate, 73-Welding rotary motor, 74-Clamping cylinder, 75-Supporting bar, 76-Welding base plate, 77-Welding steering motor, 78-Motor base plate, 79-Welding cylinder, 8-Moving pump, 9-Fixed pump. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The present invention provides the following technical solution:

[0031] like Figures 1-2As shown, an automatic sealing device with gas leak detection function is used for serpentine pipe 6 to detect leaks and automatically seal them. The automatic sealing device includes a housing 1, a marking device 2, a front-to-back moving device 3, a left-to-right moving device 4, a photoelectric position sensor 5, a welding device 7, a mobile air pump 8, and a fixed air pump 9. The housing 1 is equipped with a gas storage tank. There are three front-to-back moving devices 3, which are fastened to the housing 1. There are also three left-to-right moving devices 4, which are slidably connected to the housing 1. The moving device 4 is fixedly connected to the three front and rear moving devices 3 respectively. The photoelectric position sensor 5 is fixedly connected to the box 1. The moving air pump 8 is slidably connected to the box 1. The fixed air pump 9 is fixedly connected to the box 1. The three left and right moving devices 4 are fixedly connected to the marking device 2, the welding device 7, and the moving air pump 8 respectively. The marking device 2 is fixedly connected to the box 1. The air inlet of the fixed air pump 9 is connected to the air storage tank pipeline. The air outlet of the fixed air pump 9 is connected to the serpentine pipe 6 pipeline. The air inlet of the moving air pump 8 is connected to the air storage tank pipeline. The air outlet of the moving air pump 8 is connected to the serpentine pipe 6 pipeline.

[0032] The housing 1 serves as the installation base for mounting other devices. One end of the serpentine tube 6 is connected to the outlet of the fixed air pump 9. The outlet of the mobile air pump 8 is connected to the end of the serpentine tube 6 furthest from the fixed air pump 9 via the forward and backward moving device 3 and the left and right moving device 4, thus fixing the serpentine tube 6 in the working position. Then, the marking device 2 is driven by the forward and backward moving device 3 and the left and right moving device 4 to spray marking material at various positions on the serpentine tube 6. After spraying, the mobile air pump 8 and the fixed air pump 9 simultaneously supply nitrogen to the serpentine tube 6. If there is a leak, the nitrogen will come out from the leak and react with the marking material sprayed on the outer surface of the serpentine tube 6 to produce a fluorescent reaction. The position of the light-emitting point is detected by the photoelectric position sensor 5. Then, the forward and backward moving device 3 and the left and right moving device 4 drive the welding device 7 to the position of the light-emitting point. Then, the welding device 7 welds the leak point. After welding is completed, all devices return to their original positions.

[0033] like Figures 2-3 As shown, the marking device 2 includes a spraying device 21, a marking steering motor 22, a fluorescent cylinder 23, a storage tank 24, and a pressurizing air pump 25. The spraying device 21 is fixedly connected to the output end of the marking steering motor 22. The output end of the fluorescent cylinder 23 is fixedly connected to the marking steering motor 22. The fluorescent cylinder 23 is fixedly connected to the left and right moving device 4. The storage tank 24 is fixedly connected to the box body 1. The storage tank 24 is connected to the feed end pipe of the pressurizing air pump 25. The spraying device 21 is connected to the discharge end pipe of the pressurizing air pump 25.

[0034] The spraying device 21 sprays marking material onto the serpentine tube 6. The fluorescent cylinder 23 controls the up and down movement of the spraying device 21 to spray marking material onto the serpentine tube 6. The marking steering motor 22 controls the rotation of the spraying device 21 in all directions, allowing the spraying device 21 to spray marking material onto the turning points of the serpentine tube 6. The pressurized air pump 25 draws marking material from the storage box 24 and then delivers it to the spraying device 21, so that the spraying device 21 can spray marking material onto the serpentine tube 6.

[0035] like Figures 1-3 As shown, the front and rear moving device 3 includes a front and rear motor 31, a front and rear gear 32, a connecting rod 33, and a front and rear rack 34. The front and rear motor 31 is slidably connected to the housing 1. The output end of the front and rear motor 31 is fastened to the front and rear gear 32. The front and rear gear 32 meshes with the front and rear rack 34. The front and rear rack 34 is fastened to the housing 1. The connecting rod 33 is rotatably connected to the front and rear gear 32. The connecting rod 33 is fastened to the left and right moving device 4.

[0036] The front and rear racks 34 are fixed on the housing 1, which limits the movement path of the front and rear gears 32. The rotation of the front and rear motors 31 drives the front and rear gears 32 to rotate on the front and rear racks 34, which also drives the connecting rods 33 connected to the front and rear gears 32 to move back and forth. The connecting rods 33 drive the left and right moving device 4 to move back and forth.

[0037] like Figures 2-4 As shown, the left and right moving device 4 includes left and right racks 41, support base 42, left and right gears 43, left and right motors 44, and connecting seat 45. The left and right racks 41 are slidably connected to the housing 1, and the support base 42 is slidably connected to the housing 1. The support base 42 has an installation cavity, and the left and right motors 44 are installed in the installation cavity. The output end of the left and right motors 44 is fixedly connected to the left and right gears 43. The left and right gears 43 mesh with the left and right racks 41. The connecting seat 45 is fixedly connected to the left and right racks 41, and the connecting seat 45 is fastened to the connecting rod 33.

[0038] The left and right motors 44 serve as driving devices, driving the left and right gears 43 to rotate. The left and right gears 43 mesh with the left and right racks 41. When the left and right gears 43 rotate, they will move left and right, causing the support base 42 to move. The connecting rod 33 moves back and forth, while simultaneously causing the connecting seat 45 to move back and forth. The back and forth movement of the connecting seat 45 causes the left and right racks 41 to move back and forth. The back and forth movement of the left and right racks 41 causes the support base 42 to move back and forth, thus realizing the back, forth, left and right movement of the support base 42.

[0039] like Figure 1 , Figure 5 , Figure 6As shown, the welding device 7 includes a first welding plate 71, a second welding plate 72, a welding rotary motor 73, a clamping cylinder 74, a support bar 75, a welding base plate 76, a welding steering motor 77, a motor base plate 78, and a welding cylinder 79. The first welding plate 71 is fixedly connected to the output end of the clamping cylinder 74, the second welding plate 72 is fixedly connected to the output end of the welding rotary motor 73, the first welding plate 71 is slidably connected to the output end of the welding rotary motor 73, the clamping cylinder 74 is fixedly connected to the output end of the welding rotary motor 73, the welding rotary motor 73 is fixedly connected to the support bar 75, the clamping cylinder 74 is rotatably connected to the support bar 75, the support bar 75 is fixedly connected to the welding base plate 76, the welding base plate 76 is fixedly connected to the output end of the welding steering motor 77, the motor base plate 78 is fixedly connected to the welding steering motor 77, the output end of the welding cylinder 79 is fixedly connected to the motor base plate 78, and the welding cylinder 79 is fixedly connected to the support base 42.

[0040] The clamping cylinder 74 acts as a driving device, driving the second welding plate 72 to move towards the first welding plate 71 to clamp the welding rod. The welding rotary motor 73 controls the first welding plate 71 and the second welding plate 72 to rotate up and down, allowing the welding rod to be welded up and down. The support bar 75 supports the position of the welding rotary motor 73. The welding base plate 76 fixes the support bar 75. The welding steering motor 77 rotates, driving the welding base plate 76 to rotate, thereby allowing the first welding plate 71 and the second welding plate 72 to rotate left and right. The motor base plate 78 is used to install the welding steering motor 77. The welding cylinder 79 controls the up and down movement of the device, allowing the first welding plate 71 and the second welding plate 72 to move up and down, thus realizing the all-round welding of the serpentine tube 6.

[0041] During welding: The welding position is located by photoelectric position sensor 5, and then moved to the corresponding position by forward and backward moving device 3 and left and right moving device 4. The welding cylinder 79 moves the welding rod to the corresponding height. The welding steering motor 77 drives the welding rod to rotate left and right to the welding position. Then, the welding rotary motor 73 adjusts the up and down angle to send the welding rod to the welding point for welding.

[0042] like Figures 2-3 As shown, the spraying device 21 includes a sprayer 211, a spraying rotary motor 212, and a spraying support plate 213. The sprayer 211 is fixedly connected to the output end of the spraying rotary motor 212, the spraying rotary motor 212 is fixedly connected to the spraying support plate 213, the spraying support plate 213 is fixedly connected to the output end of the marking steering motor 22, and the sprayer 211 is connected to the pressurized air pump 25 via a pipeline.

[0043] The pressurized air pump 25 delivers the spray material to the sprayer 211 for spraying. The spray angle is controlled by the spray rotation motor 212. The spray support plate 213 is rotated left and right by the marking steering motor 22. The left and right rotation of the spray support plate 213 causes the sprayer 211 to rotate left and right. The spray support plate 213 is used to fix the spray rotation motor 212.

[0044] During spraying: The marking device 2 is moved to the outside and inside of the serpentine tube 6 by the front-to-back moving device 3 and the left-to-right moving device 4 respectively. The spraying device 21 is sent to the upper, middle and lower positions of the serpentine tube 6 by the fluorescent cylinder 23. Spraying is performed at the same time as moving along the serpentine tube 6 at these three positions. For example, when the marking device 2 is raised to the top of the serpentine tube 6 by the fluorescent cylinder 23, the spraying rotation motor 212 is rotated downward to adjust the spraying angle of the sprayer 211 and spray downward, thereby spraying the upper surface of the serpentine tube 6. At the bend of the serpentine tube 6, the left and right rotation angle of the sprayer 211 is adjusted by the marking steering motor 22 to achieve spraying at the bend of the serpentine tube 6.

[0045] Working principle of the invention:

[0046] After the serpentine tube 6 is installed in the working position, the forward and backward movement device 3 and the left and right movement device 4 control the movement of the spraying device 21 inside and outside the serpentine tube 6. The fluorescent cylinder 23 adjusts the vertical position of the spraying device 21 relative to the serpentine tube 6. When the spraying device 21 is above the serpentine tube 6, the marking steering motor 22 controls the spraying device 21 to rotate left and right until the sprayer 211 faces the serpentine tube 6. Then, the spraying rotation motor 212 rotates it up and down until the sprayer 211 is above the serpentine tube 6. Then, the spraying device 21 moves along the serpentine tube 6 and sprays marking material at different vertical positions. This makes the detection more comprehensive and accurate. By using a mobile air pump 8 and a fixed air pump 9 to deliver nitrogen into the serpentine tube 6, the pressure inside the serpentine tube 6 is increased, allowing the nitrogen to come out from the leak. The nitrogen coming out from the leak reacts with the marking material to produce fluorescence. The position of the light-emitting point is detected by the photoelectric position sensor 5. The forward and backward moving device 3 and the left and right moving device 4 drive the welding device 7 to move to the position of the light-emitting point. Then, the welding cylinder 79 adjusts the position of the welding rod to the height of the leak. The welding steering motor 77 adjusts the welding rod to the leak. The welding rotation motor 73 controls the welding rod to weld up and down at the leak, thereby achieving automatic sealing of the leak.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic sealing device for a serpentine pipe with gas leak detection function, the automatic sealing device being used for leak detection and automatic sealing of the serpentine pipe (6), characterized in that: The automatic sealing device includes a housing (1), a marking device (2), a front-to-back moving device (3), a left-to-right moving device (4), a photoelectric position sensor (5), a welding device (7), a mobile air pump (8), and a fixed air pump (9). The housing (1) is equipped with an air storage tank. There are three front-to-back moving devices (3), which are securely connected to the housing (1). There are also three left-to-right moving devices (4), which are slidably connected to the housing (1). Each of the three left-to-right moving devices (4) is securely connected to one of the three front-to-back moving devices (3). The photoelectric position sensor (5)... The sensor (5) is fixedly connected to the housing (1), the mobile air pump (8) is slidably connected to the housing (1), the fixed air pump (9) is fixedly connected to the housing (1), the three left and right moving devices (4) are respectively fixedly connected to the marking device (2), the welding device (7), and the mobile air pump (8), the marking device (2) is fixedly connected to the housing (1), the air inlet of the fixed air pump (9) is connected to the air storage tank pipeline, the air outlet of the fixed air pump (9) is connected to the serpentine pipe (6) pipeline, the air inlet of the mobile air pump (8) is connected to the air storage tank pipeline, and the air outlet of the mobile air pump (8) is connected to the serpentine pipe (6) pipeline; The marking device (2) includes a spraying device (21), a marking steering motor (22), a fluorescent cylinder (23), a storage tank (24), and a pressurizing air pump (25). The spraying device (21) is fixedly connected to the output end of the marking steering motor (22). The output end of the fluorescent cylinder (23) is fixedly connected to the marking steering motor (22). The fluorescent cylinder (23) is fixedly connected to the left and right moving device (4). The storage tank (24) is fixedly connected to the box body (1). The storage tank (24) is connected to the feed end pipe of the pressurizing air pump (25). The spraying device (21) is connected to the discharge end pipe of the pressurizing air pump (25). The left and right moving device (4) includes a support base (42), which is slidably connected to the housing (1); The welding device (7) includes a first welding plate (71), a second welding plate (72), a welding rotary motor (73), a clamping cylinder (74), a support bar (75), a welding base plate (76), a welding steering motor (77), a motor base plate (78), and a welding cylinder (79). The first welding plate (71) is fastened to the output end of the clamping cylinder (74), and the second welding plate (72) is fastened to the output end of the welding rotary motor (73). The first welding plate (71) and the output end of the welding rotary motor (73) are slidably connected. The clamping cylinder (74) The welding rotary motor (73) is fastened to the output end of the welding rotary motor (73), the welding rotary motor (73) is fastened to the support bar (75), the clamping cylinder (74) is rotatably connected to the support bar (75), the support bar (75) is fastened to the welding base plate (76), the welding base plate (76) is fastened to the output end of the welding steering motor (77), the motor base plate (78) is fastened to the welding steering motor (77), the output end of the welding cylinder (79) is fastened to the motor base plate (78), and the welding cylinder (79) is fastened to the support base (42).

2. The automatic sealing device for serpentine pipes with gas leak detection function according to claim 1, characterized in that: The front and rear moving device (3) includes a front and rear motor (31), a front and rear gear (32), a connecting rod (33), and a front and rear rack (34). The front and rear motor (31) is slidably connected to the housing (1). The output end of the front and rear motor (31) is fastened to the front and rear gear (32). The front and rear gear (32) meshes with the front and rear rack (34). The front and rear rack (34) is fastened to the housing (1). The connecting rod (33) is rotatably connected to the front and rear gear (32). The connecting rod (33) is fastened to the left and right moving device (4).

3. An automatic sealing device with gas leak detection function for a serpentine pipe according to claim 2, characterized in that: The left and right moving device (4) includes left and right racks (41), left and right gears (43), left and right motors (44), and connecting seat (45). The left and right racks (41) are slidably connected to the housing (1). The support base (42) has an installation cavity. The installation cavity has a left and right motor (44). The output end of the left and right motor (44) is fixedly connected to the left and right gears (43). The left and right gears (43) mesh with the left and right racks (41). The connecting seat (45) is fixedly connected to the left and right racks (41). The connecting seat (45) is fastened to the connecting rod (33).

4. An automatic sealing device with gas leak detection function for a serpentine pipe according to claim 1, characterized in that: The spraying device (21) includes a sprayer (211), a spraying rotary motor (212), and a spraying support plate (213). The sprayer (211) is fastened to the output end of the spraying rotary motor (212), the spraying rotary motor (212) is fastened to the spraying support plate (213), the spraying support plate (213) is fastened to the output end of the marking steering motor (22), and the sprayer (211) is connected to the pressurized air pump (25) via a pipeline.

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