High-pressure pipeline airtightness detection device and detection method

Abstract

The invention relates to the technical field of high-pressure pipeline airtightness detection, and particularly discloses a high-pressure pipeline airtightness detection device and method, and the device comprises a mounting frame, a gas cylinder storage box, a gas pump, a controller, a workpiece mechanism, an external gas collection mechanism, a gas cylinder fixing frame, a gas cylinder, and an electric control diverter valve. The gas cylinder storage box is mounted in the middle of the rear side of the mounting frame; the two gas pumps are respectively mounted on the upper side and the lower side of the gas cylinder storage box; the workpiece mechanism is mounted at the bottom of the inner side of the mounting frame; the external gas collecting mechanism is mounted at the front end of the top of the inner side of the mounting frame; the two gas cylinders are installed on the left side and the right side in the gas cylinder fixing frame respectively. The halogen gas tracing detection is carried out on the high-pressure pipeline workpiece in an automatic mode, the detection time is shortened, the detection efficiency is improved, tiny leakage points in the high-pressure pipeline can be accurately found, the influence of the complexity of the pipeline structure is avoided, and all parts of the pipeline can be comprehensively covered for detection.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure pipeline air tightness detection, and in particular to a high-pressure pipeline air tightness detection device and a detection method. Background Art

[0002] In the prior art, soap bubble method, differential pressure detection method and ultrasonic detection method are used for air tightness detection of high-pressure pipelines. The soap bubble method can only detect relatively large leakage points. For tiny leakages, the leakage amount is small and not enough to form obvious bubbles, so it is difficult to meet the demand of such high-sensitivity detection. The differential pressure detection method can only determine whether the pipeline as a whole is leaking, and cannot accurately point out the specific location of the leakage point. It needs to use other detection means for further investigation, and the differential pressure detection method is affected by factors such as ambient temperature and pressure fluctuations. The ultrasonic detection method requires the operator to have high professional skills and experience, and be able to accurately identify and analyze ultrasonic signals. In some complex industrial environments, there are multiple ultrasonic sources, such as ultrasonic noise generated by equipment operation, which requires the operator to accurately distinguish ultrasonic signals generated by leaks from other interference signals. Summary of the invention

[0003] The object of the present invention is to provide a high-pressure pipeline air tightness detection device and detection method to solve the problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-pressure pipeline airtightness detection device, comprising: a mounting frame, a gas cylinder storage box, a gas pump, a controller, a workpiece mechanism, an external gas collection mechanism, a gas cylinder fixing frame, a gas cylinder and an electrically controlled diverter valve; the gas cylinder storage box is mounted at the middle of the rear side of the mounting frame; the number of the gas pumps is two, and the two gas pumps are respectively mounted on the upper and lower sides of the gas cylinder storage box; the controller is mounted on the left side of the outer side of the mounting frame, and the controller is electrically connected to the controller; the workpiece mechanism is mounted on the inner bottom of the mounting frame; the external gas collection mechanism is mounted on the front end of the inner top of the mounting frame; the gas cylinder fixing frame is mounted on the front side of the inner cavity of the gas cylinder storage box; the number of the gas cylinders is two, and the two gas cylinders are respectively mounted on the left and right sides of the interior of the gas cylinder fixing frame; the electrically controlled diverter valve is mounted on the top of the front side of the inner cavity of the gas cylinder storage box, the electrically controlled diverter valve is connected to the gas cylinder through a pipeline, the electrically controlled diverter valve is connected to the upper and lower gas pumps through a pipeline, and the electrically controlled diverter valve is electrically connected to the controller.

[0005] Preferably, the workpiece mechanism includes: a multi-stage telescope, a first motor, a first slot body shell, a movable slide, a first screw assembly, a second motor, a bevel gear set and a linear motor; the number of the multi-stage telescopes is two, and the two multi-stage telescopes are respectively installed on the left and right ends of the inner side of the mounting frame in the front-to-back direction, and the multi-stage telescope is electrically connected to the controller; the first motor is installed on the outside of the telescopic end of the left multi-stage telescope, and the first motor is electrically connected to the controller; the first slot body shell is rotatably connected to the inner sides of the telescopic ends of the left and right multi-stage telescopes through bearings in the left-right direction, and the rotating end of the first motor is connected to the left end of the axis of the first slot body shell; movable slide Installed in the inner cavity of the first slot body shell along the left-right direction; the first screw assembly is arranged in the inner cavity of the first slot body shell along the left-right direction and is located on the inner side of the movable slide, and the screw nut in the first screw assembly is connected to the movable end in the movable slide; the second motor is installed on the left side of the top end of the first slot body shell, the rotating end of the second motor extends into the inner cavity of the first slot body shell, and the second motor is electrically connected to the controller; one end of the bevel gear set is installed at the rotating end of the second motor, and the other end of the bevel gear set is connected to the left end of the axis of the screw in the first screw assembly; the linear motor is installed at the bottom of the movable end of the movable slide, and the linear motor is electrically connected to the controller.

[0006] Preferably, the workpiece mechanism also includes: a fixed frame, a slot shell, a first electric telescopic rod, a second electric telescopic rod, a movable frame, a rotating shell, a third electric telescopic rod, a connecting frame, a limit rod, a connecting rod and a fourth electric telescopic rod; the fixed frame is installed at the bottom of the lifting end of the linear motor in the up and down direction; the slot shell is rotatably connected to the outer bottom of the fixed frame through a rotating shaft seat in the front and back direction; one end of the first electric telescopic rod is rotatably connected to the front top of the slot shell through the rotating shaft seat, and the other end of the first electric telescopic rod is rotatably connected to the top of the slot shell through the rotating shaft seat, and the first electric telescopic rod is electrically connected to the controller; the second electric telescopic rod is installed in the inner cavity of the slot shell in the front and back direction, and the second electric telescopic rod is electrically connected to the controller; the movable frame is plugged into the bottom of the slot shell in the front and back direction, and the telescopic end of the second electric telescopic rod extends out of the slot shell and is connected to the top front side of the movable frame; the rotating shell is rotatably connected to the movable frame through the rotating shaft seat The outer front end of the frame; one end of the third electric telescopic rod is rotatably connected to the rear side of the bottom end of the mobile frame through a rotating shaft seat, the other end of the third electric telescopic rod is rotatably connected to the inner side of the rotating shell through a rotating shaft, and the third electric telescopic rod is electrically connected to the controller; the connecting frame is rotatably connected to the inner front end of the rotating shell through the rotating shaft in the up and down directions; the number of the limit rods is two, and one end of the two limit rods is rotatably connected to the front sides of the left and right ends of the inner side of the rotating shell through the rotating shaft; the number of the connecting rods is two, and one end of the two connecting rods is rotatably connected to the inner sides of the other ends of the two limit rods through the rotating shaft; the number of the fourth electric telescopic rods is two, and one end of the two fourth electric telescopic rods is rotatably connected to the rear sides of the left and right ends of the inner sides of the two rotating shells through the rotating shaft, and the telescopic ends of the two fourth electric telescopic rods are respectively rotatably connected to the outside of the axis center of the rotating shaft at the connection position of the limit rods and the connecting rods on the left and right sides through bearings, and the fourth electric telescopic rod is electrically connected to the controller.

[0007] Preferably, the workpiece mechanism also includes: an installation truss, a first fixed frame, a first guide rail assembly, a second screw assembly, a third motor, a second fixed frame, a mounting seat, a sealing gasket and a docking joint; the installation truss is installed at the bottom of the connecting frame along the front-to-back direction; the first fixed frame is installed at the front side of the bottom end of the installation truss; the first guide rail assembly is installed at the rear side of the bottom end of the installation truss along the front-to-back direction; the second screw assembly is installed at the bottom end of the installation truss through the bearing seat along the front-to-back direction and is located on the outside of the first guide rail assembly; the third motor is installed at the rear side of the bottom end of the installation truss The rotating end of the machine is connected to the rear end of the axis of the lead screw in the second lead screw assembly, and the third motor is electrically connected to the controller; the second fixing frame is installed at the bottom of the limit end of the second electric telescopic rod, and the second fixing frame is connected to the lead screw nut in the second lead screw assembly; the number of the mounting seats is two, and the two connecting frames are respectively installed at the bottom of the first mounting frame and the second mounting frame; the number of the sealing gaskets is two, and the two limit rods are respectively arranged on the inner sides of the two mounting seats; the number of the docking joints is two, and the two docking joints are respectively arranged on the inner sides of the two sealing gaskets.

[0008] Preferably, the workpiece mechanism also includes: a mounting frame, a mounting plate, a fifth electric telescopic rod, a rotating seat and a driving wheel; the number of the mounting frames is two, and the two fourth electric telescopic rods are respectively arranged at the middle parts of the front and rear sides of the mounting truss; the number of the mounting plates is two, and the two mounting plates are respectively rotatably connected to the outer bottom of the left and right mounting frames through the rotating shaft seats; the number of the mounting plates is two, and the two mounting plates are respectively rotatably connected to the inner middle parts of the left and right mounting frames through the rotating shaft seats, and the telescopic ends of the two fifth electric telescopic rods are respectively rotatably connected to the tops of the left and right mounting plates through the rotating shaft seats, and the fifth electric telescopic rod is electrically connected to the controller; the number of the rotating seats is two, and the two first motors are respectively mounted on the outer sides of the bottom ends of the left and right mounting plates; the number of the driving wheels is two, and the two driving wheels are respectively mounted on the rotating ends of the left and right rotating seats, and the driving wheels are electrically connected to the controller.

[0009] Preferably, the external gas collection mechanism includes: a scissor-type telescopic module, a second trough body shell, a second guide rail assembly, a connecting seat, a third screw assembly, a fourth motor and a gas sensor; the number of the scissor-type telescopic modules is two, and the two scissor-type telescopic modules are respectively arranged on the left and right sides of the inner top front end of the installation frame, and the scissor-type telescopic module is electrically connected to the controller; the second trough body shell is installed along the left and right directions at the bottom of the lifting ends of the left and right scissor-type telescopic modules; the number of the second guide rail assemblies is two, and the two second guide rail assemblies are respectively arranged on the rear side of the second trough body shell along the left and right directions The first and second ends of the second guide rail assembly are connected, and the second and second guide rail assemblies are connected at the bottom and the bottom of the second guide rail assembly is connected. The third screw assembly is rotatable along the left and right directions through the rotating shaft seat at the rear side of the second slot body shell and is located on the inner side of the upper and lower second guide rail assemblies, and the screw nut in the third screw assembly is connected to the rear side of the connecting seat; the fourth motor is arranged at the left end of the rear side of the second slot body shell, and the rotating end of the fourth motor is connected to the left end of the axis of the screw in the third screw assembly, and the fourth motor is electrically connected to the controller; the gas sensor is arranged at the bottom of the gas sensor, and the gas sensor is electrically connected to the controller.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The first motor drives the first slot body shell to rotate, so that the first slot body shell is flipped to the downward position on the inner side of the telescopic end of the multi-stage telescope on the left and right sides. The second motor drives the linear motor to drive the fixed frame to rise and fall to the height position under the transmission of the bevel gear set and the first screw assembly. The first electric telescopic rod drives the slot shell to rotate upward or downward to the angle position at the bottom of the fixed frame. The second electric telescopic rod drives the moving frame to move forward or backward. The third electric telescopic rod drives the rotating shell to rotate upward or downward to the angle position. The fourth electric telescopic rods on the left and right sides drive the limit rods on both sides to rotate forward or backward, and drive the connecting frame to rotate to the left or right side to the direction under the cooperation of the limit rods and connecting rods on both sides. The lower joint of the front first fixed frame is inserted into the front end of the pipeline workpiece to be detected for docking. The third motor drives the second fixed frame to move forward and backward to the position under the cooperation of the second screw assembly, so that the sealing gasket under the second fixed frame contacts the position of the pipeline end of the pipeline workpiece to be detected, and the lower joint is inserted into the rear end of the pipeline workpiece to be detected for docking.

[0011] 2. The fifth electric telescopic rod drives the mounting plate to rotate forward on the inner side of the mounting frame, so as to drive the driving wheel to contact the outer wall of the pipeline workpiece to be detected with the cooperation of the rotating seat, and the scissor-type telescopic modules on the left and right sides drive the second trough shell to rise and fall to a height position, and the fourth motor drives the lead screw in the third lead screw assembly to rotate, so that the lead screw nut in the third lead screw assembly drives the connecting seat, and the connecting seat drives the gas sensor to move horizontally to the left and right positions under the limiting action of the second guide rail assembly, and the top gas pump discharges the detection gas stored in the gas cylinder into the pipeline workpiece to be detected under the diversion of the electric control diverter valve. After the detection is completed, the bottom gas pump collects the detection gas inside the pipeline workpiece to be detected, and discharges it into the gas cylinder through the electric control diverter valve for re-storage, and the gas sensor senses the detection gas leaked from the outside of the pipeline, and the internal motors of the driving wheels on the left and right sides drive the rollers to rotate, so that the pipeline workpiece to be detected is driven to rotate by the internal rollers of the driving wheel with the cooperation of the upper and lower sealing gaskets, so as to realize the circumferential detection of the pipeline workpiece to be detected.

[0012] In summary, the present invention uses an automated method to perform halogen gas tracer detection on high-pressure pipeline workpieces, shortens the detection time, improves the detection efficiency, and can accurately find tiny leakage points in high-pressure pipelines. It is not affected by the complexity of the pipeline structure and can comprehensively cover all parts of the pipeline for detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A partial exploded view of Figure 3 for Figure 1 Exploded diagram of the workpiece structure; Figure 4 for Figure 3 A magnified image of point A; Figure 5 for Figure 3 A magnified view of point B; Figure 6 for Figure 3 Enlarged view of point C; Figure 7 for Figure 3 The enlarged view of point D; Figure 8 for Figure 1 Exploded view of the external gas collection mechanism.

[0014] In the figure: 1. mounting frame; 2. gas cylinder storage box; 3. gas pump; 4. controller; 5. workpiece mechanism; 51. multi-stage telescopic device; 52. first motor; 53. first slot housing; 54. movable slide; 55. first lead screw assembly; 56. second motor; 57. bevel gear set; 58. linear motor; 59. fixed frame; 510. slot housing; 511. first electric telescopic rod; 512. second electric telescopic rod; 513. movable frame; 514. rotating housing; 515. third electric telescopic rod; 516. connecting frame; 517. limit rod; 518. connecting rod; 519. fourth electric telescopic rod; 520. installation Truss; 521, first fixed frame; 522, first guide rail assembly; 523, second screw assembly; 524, third motor; 525, second fixed frame; 526, mounting seat; 527, sealing gasket; 528, docking joint; 529, mounting frame; 530, mounting plate; 531, fifth electric telescopic rod; 532, rotating seat; 533, driving wheel; 6, external gas collection mechanism; 61, scissor-type telescopic module; 62, second trough body shell; 63, second guide rail assembly; 64, connecting seat; 65, third screw assembly; 66, fourth motor; 67, gas sensor; 7, gas cylinder fixing frame; 8, gas cylinder; 9, electric-controlled diverter valve. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-Figure 8The present invention provides a technical solution: a high-pressure pipeline airtightness detection device, comprising: an installation frame 1, a gas cylinder storage box 2, a gas pump 3, a controller 4, a workpiece mechanism 5, an external gas collection mechanism 6, a gas cylinder fixing frame 7, a gas cylinder 8 and an electrically controlled diverter valve 9; the gas cylinder storage box 2 is installed in the middle of the rear side of the installation frame 1; there are two gas pumps 3, which are respectively installed on the upper and lower sides of the gas cylinder storage box 2, and the gas pump 3 is controlled by the controller 4. The gas pump 3 realizes gas discharge and discharge while controlling the gas pressure. An extension pipeline is arranged outside the gas pump 3 to facilitate connection with a docking joint 528 at a corresponding position; the controller 4 is installed on the left side of the outer side of the installation frame 1, and the controller 4 is electrically connected to the controller 4. A preset program is arranged inside the controller 4 to automatically control the electrical components inside the device; the workpiece mechanism 5, an external gas collection mechanism 6, a gas cylinder fixing frame 7, a gas cylinder 8 and an electrically controlled diverter valve 9; the gas cylinder storage box 2 is installed in the middle of the rear side of the installation frame 1; the gas pump 3 is two, and the two gas pumps 3 are respectively installed on the upper and lower sides of the gas cylinder storage box 2, and the gas pump 3 is controlled by the controller 4. The gas pump 3 realizes gas discharge and discharge while controlling the gas pressure. An extension pipeline is arranged outside the gas pump 3 to facilitate connection with a docking joint 528 at a corresponding position; the controller 4 is installed on the left side of the outer side of the installation frame 1, and the controller 4 is electrically connected to the controller 4. A preset program is arranged inside the controller 4 to automatically control the electrical components inside the device; the workpiece mechanism 5, an external gas pressure detection device 526, an external gas pressure detection device 527, an external gas pressure detection device 528, an external gas pressure detection device 528 The component mechanism 5 is installed at the inner bottom of the installation frame 1; the external gas collecting mechanism 6 is installed at the inner top front end of the installation frame 1; the gas cylinder fixing frame 7 is installed at the front side of the inner cavity of the gas cylinder storage box 2; there are two gas cylinders 8, and the two gas cylinders 8 are respectively installed on the left and right sides of the inner cavity of the gas cylinder fixing frame 7, and the gas cylinder 8 can store sulfur hexafluoride halogen gas as the detection gas; the electric-controlled diverter valve 9 is installed at the front top of the inner cavity of the gas cylinder storage box 2, the electric-controlled diverter valve 9 is connected to the gas cylinder 8 through a pipeline, the electric-controlled diverter valve 9 is connected to the upper and lower gas pumps 3 through a pipeline, the electric-controlled diverter valve 9 and the controller 4 are electrically connected, the electric-controlled diverter valve 9 is controlled by the controller 4 to start and work, and the electric-controlled diverter valve 9 can realize the diversion effect of the pipeline connected to the gas cylinder 8, realize the discharge of the detection gas inside the gas cylinder 8 or inject the detection gas into the gas cylinder 8.

[0017] As a preferred solution, further, Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the workpiece mechanism 5 includes: a multi-stage telescopic device 51, a first motor 52, a first slot housing 53, a movable slide 54, a first screw assembly 55, a second motor 56, a bevel gear set 57, a linear motor 58, a fixed frame 59, a slot housing 510, a first electric telescopic rod 511, a second electric telescopic rod 512, a movable frame 513, a rotating housing 514, a third electric telescopic rod 515, a connecting frame 516, a limit rod 517, a connecting rod 518, a fourth electric telescopic rod 519, an installation truss 520, a first fixed frame 521, a first guide rail assembly 522, a second screw assembly 523, a third motor 524, a second fixed frame 525, a mounting seat 526, a sealing gasket 527, a docking joint 528, an installation Frame 529, mounting plate 530, fifth electric telescopic rod 531, rotating seat 532 and driving wheel 533; there are two multi-stage telescopic devices 51, which are respectively installed at the left and right ends of the inner side of the mounting frame 1 along the front-back direction, the multi-stage telescopic devices 51 are electrically connected to the controller 4, the multi-stage telescopic devices 51 are controlled to start and work by the controller 4, and the multi-stage telescopic devices 51 themselves can perform multi-stage telescopic extension to drive the internal telescopic end to extend to a specified position; the first motor 52 is installed outside the telescopic end of the left multi-stage telescopic device 51, the first motor 52 is electrically connected to the controller 4, the first motor 52 is controlled to start and work by the controller 4, and the first motor 52 can drive the first slot body shell 53 to extend the multi-stage telescopic device 51. The inner side of the telescopic end rotates to the specified direction; the first slot shell 53 is rotatably connected to the inner side of the telescopic ends of the left and right multi-stage telescopes 51 through bearings in the left and right directions, and the rotating end of the first motor 52 is connected to the left end of the axis of the first slot shell 53; the movable slide 54 is installed in the inner cavity of the first slot shell 53 in the left and right directions, and the guide rail in the movable slide 54 is installed in the inner cavity of the first slot shell 53 in the left and right directions, and the outer side of the guide rail is sleeved with a slide as a movable end; the first screw assembly 55 is arranged in the inner cavity of the first slot shell 53 in the left and right directions and is located on the inner side of the movable slide 54, the screw nut in the first screw assembly 55 is connected to the movable end of the movable slide 54, and the screw screw in the first screw assembly 55 is connected in the front-back direction through bearings The seat is rotatably arranged in the inner cavity of the first slot housing 53, and a screw nut is screwed on the outside of the lead screw; the second motor 56 is installed on the left side of the top end of the first slot housing 53, and the rotating end of the second motor 56 extends into the inner cavity of the first slot housing 53. The second motor 56 is electrically connected to the controller 4, and the second motor 56 is controlled by the controller 4 to start and work. The second motor 56 can drive the bevel gear at one end of the bevel gear set 57 to rotate clockwise or counterclockwise; one end of the bevel gear set 57 is installed at the rotating end of the second motor 56, and the other end of the bevel gear set 57 is connected to the left end of the axis of the lead screw in the first lead screw assembly 55. The bevel gear set 57 plays a transmission role between the second motor 56 and the lead screw in the first lead screw assembly 55;The linear motor 58 is installed at the bottom of the moving end of the moving slide 54. The linear motor 58 is electrically connected to the controller 4. The linear motor 58 is started and works by the controller 4. The linear motor 58 can drive the fixed frame 59 to rise and fall to a specified height position; the fixed frame 59 is installed at the bottom of the lifting end of the linear motor 58 along the up and down direction; the slot housing 510 is rotatably connected to the outer bottom of the fixed frame 59 through a rotating shaft seat along the front and back directions; one end of the first electric telescopic rod 511 is rotatably connected to the front top of the slot housing 510 through the rotating shaft seat, and the other end of the first electric telescopic rod 511 is rotatably connected to the top of the slot housing 510 through the rotating shaft seat. The first electric telescopic rod 511 The first electric telescopic rod 511 is electrically connected to the controller 4, and is started and operated by the controller 4. The first electric telescopic rod 511 drives the slot housing 510 to rotate upward or downward at the outer bottom of the fixed frame 59 by its own extension and contraction. The first electric telescopic rod 511 can rotate around the inner axis of the rotating shaft seat on the outer side of the fixed frame 59 as the axis during its own extension and contraction. The second electric telescopic rod 512 is installed in the inner cavity of the slot housing 510 along the front-to-back direction. The second electric telescopic rod 512 is electrically connected to the controller 4, and is started and operated by the controller 4. The second electric telescopic rod 512 drives the moving frame 513 by its own extension and contraction. It moves forward and backward at the bottom of the slot shell 510; the mobile frame 513 is plugged into the bottom of the slot shell 510 along the front and rear direction, and the telescopic end of the second electric telescopic rod 512 extends out of the outside of the slot shell 510 and is connected to the top front side of the mobile frame 513; the rotating shell 514 is rotatably connected to the outer front end of the mobile frame 513 through the rotating shaft seat; one end of the third electric telescopic rod 515 is rotatably connected to the rear side of the bottom end of the mobile frame 513 through the rotating shaft seat, and the other end of the third electric telescopic rod 515 is rotatably connected to the inner side of the rotating shell 514 through the rotating shaft, the third electric telescopic rod 515 is electrically connected to the controller 4, and the third electric telescopic rod 515 is controlled by the controller 4 to start and operate When the third electric telescopic rod 515 is working, it drives the mobile frame 513 to rotate upward or downward on the outer side of the mobile frame 513 by extending and shortening itself. During the extension and shortening process of the third electric telescopic rod 515 itself, it can rotate around the internal axis of the rotating shaft seat at the bottom of the mobile frame 513; the connecting frame 516 is rotatably connected to the inner front end of the rotating shell 514 along the up and down directions through the rotating shaft; there are two limit rods 517, and one end of the two limit rods 517 is rotatably connected to the front sides of the left and right ends of the inner side of the rotating shell 514 through the rotating shaft; there are two connecting rods 518, and one end of the two connecting rods 518 is rotatably connected to the inner side of the other end of the two limit rods 517 through the rotating shaft;There are two fourth electric telescopic rods 519, one end of the two fourth electric telescopic rods 519 is rotatably connected to the left and right rear ends of the inner sides of the two rotating shells 514 through the rotating shafts, and the telescopic ends of the two fourth electric telescopic rods 519 are respectively rotatably connected to the outer side of the axis of the rotating shaft at the connection position of the limit rods 517 and the connecting rod 518 on the left and right sides through bearings. The fourth electric telescopic rod 519 is electrically connected to the controller 4, and the fourth electric telescopic rod 519 is controlled by the controller 4 to start and work. The fourth electric telescopic rod 519 drives the limit rod 517 to rotate forward or backward on the inner side of the rotating shell 514 by its own extension and shortening. The fourth electric telescopic rod 519 can The truss 520 is installed at the bottom of the connecting frame 516 along the front-to-back direction; the first fixing frame 521 is installed at the front side of the bottom end of the truss 520; the first guide rail assembly 522 is installed at the rear side of the bottom end of the truss 520 along the front-to-back direction, the guide rail in the first guide rail assembly 522 is arranged along the front-to-back direction and a slider is sleeved on the outside of the guide rail as a limit end; the second lead screw assembly 523 is installed at the bottom end of the truss 520 through a bearing seat along the front-to-back direction and is located on the outside of the first guide rail assembly 522, the lead screw in the second lead screw assembly 523 is rotatably arranged at the bottom end of the truss 520 through a bearing seat along the front-to-back direction, and the lead screw A lead screw nut is screwed on the outside; the third motor 524 is installed on the rear side of the bottom end of the mounting truss 520, the rotating end of the third motor 524 is connected to the rear end of the axis of the lead screw in the second lead screw assembly 523, the third motor 524 is electrically connected to the controller 4, the third motor 524 is controlled by the controller 4 to start and work, and the third motor 524 can drive the lead screw in the second lead screw assembly 523 to rotate; the second fixed frame 525 is installed at the bottom of the limit end of the second electric telescopic rod 512, and the second fixed frame 525 is connected to the lead screw nut in the second lead screw assembly 523; there are two mounting seats 526, and the two connecting frames 516 are respectively installed on the first fixed frame 521 and the second fixed frame The bottom of 525; there are two sealing pads 527, two limit rods 517 are respectively arranged on the inner sides of the two mounting seats 526, and the sealing pads 527 are arranged with inner and outer rings, wherein the outer ring of the sealing pad 527 can rotate on the outer side of the inner ring while maintaining the sealing performance, so as to ensure the rotation of the detection pipeline workpiece; there are two butt joints 528, and the two butt joints 528 are respectively arranged on the inner sides of the two sealing pads 527; there are two mounting frames 529, and the two fourth electric telescopic rods 519 are respectively arranged at the middle of the front and rear sides of the mounting truss 520; there are two mounting plates 530, and the two mounting plates 530 are respectively rotatably connected to the outer bottom of the left and right mounting frames 529 through the rotating shaft seat;There are two mounting plates 530, and the two mounting plates 530 are rotatably connected to the middle of the inner side of the left and right mounting frames 529 through the rotating shaft seats, respectively. The telescopic ends of the two fifth electric telescopic rods 531 are rotatably connected to the tops of the left and right mounting plates 530 through the rotating shaft seats, respectively. The fifth electric telescopic rod 531 is electrically connected to the controller 4, and the fifth electric telescopic rod 531 is controlled by the controller 4 to start and work. The fifth electric telescopic rod 531 drives the mounting plate 530 to rotate upward or downward on the inner side of the mounting frame 529 by extending and shortening itself. During the extension and shortening process of the fifth electric telescopic rod 531 itself It can rotate with the inner rotating shaft seat axis of the mounting frame 529 as the axis; there are two rotating seats 532, and two first motors 52 are respectively installed on the outer sides of the bottom ends of the left and right mounting plates 530; there are two driving wheels 533, and the two driving wheels 533 are respectively installed at the rotating ends of the left and right rotating seats 532. The driving wheels 533 are electrically connected to the controller 4. The driving wheels 533 can rotate with the internal rotating shaft axis of the rotating seat 532 as the axis under the cooperation of the rotating seat 532. The driving wheels 533 are controlled by the controller 4 to start and work, and the motor inside the driving wheels 533 can drive the roller to rotate. ;

[0018] As a preferred solution, further, Figure 8As shown, the external gas collection mechanism 6 includes: a scissor-type telescopic module 61, a second slot body shell 62, a second guide rail assembly 63, a connecting seat 64, a third screw assembly 65, a fourth motor 66 and a gas sensor 67; the number of the scissor-type telescopic modules 61 is two, and the two scissor-type telescopic modules 61 are respectively arranged on the left and right sides of the inner top front end of the installation frame 1, and the scissor-type telescopic modules 61 are electrically connected to the controller 4; the second slot body shell 62 is installed at the bottom of the lifting end of the left and right scissor-type telescopic modules 61 along the left and right directions; the number of the second guide rail assemblies 63 is two, and the two second guide rail assemblies 63 are respectively arranged at the upper and lower ends of the rear side of the second slot body shell 62 along the left and right directions, and the guide rails in the second guide rail assembly 63 are arranged along the left and right directions and the outer part of the guide rails is sleeved with a slider as a limit end; the connecting seat 64 is arranged on the rear side of the limit ends of the upper and lower second guide rail assemblies 63; the third screw assembly 65 is rotatably arranged in the second slot body shell through the rotating shaft seat along the left and right directions 62 and is located on the rear side of the upper and lower second guide rail assemblies 63, the screw nut in the third screw assembly 65 is connected to the rear side of the connecting seat 64, the screw in the third screw assembly 65 is rotatably arranged in the inner cavity of the second slot body shell 62 through the bearing seat along the front and rear direction, and the screw nut is screwed on the outside of the screw; the fourth motor 66 is arranged at the left end of the rear side of the second slot body shell 62, the rotating end of the fourth motor 66 is connected to the left end of the axis of the screw in the third screw assembly 65, the fourth motor 66 is electrically connected to the controller 4, the fourth motor 66 is controlled by the controller 4 to start and work, and the fourth motor 66 can drive the screw in the third screw assembly 65 to rotate clockwise or counterclockwise; the gas sensor 67 is arranged at the bottom of the gas sensor 67, the gas sensor 67 is electrically connected to the controller 4, the gas sensor 67 can sense the detection gas leaked from the outside of the pipeline, and send the detected data to the inside of the controller 4.

[0019] A high pressure pipeline air tightness detection method, comprising the following steps: Step 1: The staff installs the gas cylinder 8 containing sulfur hexafluoride halogen gas inside the gas cylinder fixing frame 7, and connects the internal pipelines of the bottom and top gas pumps 3 to the front and rear joints 528 respectively, and thoroughly cleans the high-pressure pipeline workpiece to be tested to remove internal impurities, oil stains and moisture to prevent them from interfering with the distribution and detection of the halogen gas, and places it at the designated position on the front side of the device; Step 2: The multi-stage telescopic devices 51 on the left and right sides extend to drive the first trough shell 53 to move forward, so as to drive the front and rear docking joints 528 to move to the designated position above the workpiece under the cooperation of the first trough shell 53 and the structure below it, and the first motor 52 drives the first trough shell 53 to rotate, so that the first trough shell 53 is turned over to the downward position inside the telescopic end of the multi-stage telescopic devices 51 on the left and right sides; Step 3: The second motor 56, under the transmission of the bevel gear set 57 and the drive of the first screw assembly 55, drives the linear motor 58 to move horizontally to the position inside the movable slide 54, and the linear motor 58 drives the fixed frame 59 to rise and fall to the height position to achieve horizontal position adjustment; Step 4: The first electric telescopic rod 511 drives the slot housing 510 to rotate upward or downward to an angle position at the bottom of the fixed frame 59, the second electric telescopic rod 512 extends and shortens to drive the movable frame 513 to move forward or backward at the bottom of the slot housing 510, the third electric telescopic rod 515 extends and shortens to drive the rotating housing 514 to rotate upward or downward to an angle position outside the movable frame 513, the fourth electric telescopic rods 519 on the left and right sides extend and shorten, driving the upper limit rods 517 at the corresponding positions on both sides to rotate forward or backward inside the rotating housing 514, and driving one end of the connecting rods 518 on both sides to move forward or backward with the cooperation of the limit rods 517 on both sides, and then driving the connecting frame 516 to rotate to the left or right direction at the front end of the inner side of the rotating housing 514 with the cooperation of the connecting rods 518 on both sides, and then driving the front and rear side joints 528 to align with the two ends of the workpiece with the cooperation of the truss 520 installed below. Step 5: The lower joint 528 of the front first fixing frame 521 is inserted into the interior of the front end of the pipeline workpiece to be inspected for docking, and the third motor 524 drives the second fixing frame 525 to move forward and backward to a position through the second screw assembly 523, so that the sealing gasket 527 under the second fixing frame 525 contacts the position of the pipeline end of the pipeline workpiece to be inspected, and the lower joint 528 is inserted into the interior of the rear end of the pipeline workpiece to be inspected for docking; Step 6: The first motor 52 drives the first tank shell 53 to rotate in the opposite direction, so that the pipeline workpiece to be inspected inside the two side joints 528 rotates upward to a vertical state, and the left and right first fixing frames 521 are shortened so that the pipeline workpiece to be inspected moves backward to the inner side of the installation frame 1; Step 7: The fifth electric telescopic rod 531 drives the mounting plate 530 to rotate toward the front side inside the mounting frame 529, so as to drive the driving wheel 533 to contact the outer wall of the pipeline workpiece to be inspected under the cooperation of the rotating seat 532; Step 8: The top gas pump 3 discharges the test gas stored in the gas cylinder 8 into the interior of the pipeline workpiece to be tested under the diversion of the electric-controlled diverter valve 9, and the motors inside the driving wheels 533 on the left and right sides drive the rollers to rotate, so that the pipeline workpiece to be tested is driven to rotate by the rollers inside the driving wheels 533 under the cooperation of the sealing gaskets 527 on the upper and lower sides, so as to realize the circumferential detection of the pipeline workpiece to be tested; Step nine: The scissor-type telescopic modules 61 on the left and right sides drive the second tank shell 62 to rise and fall to a height position, and the fourth motor 66, in cooperation with the third screw assembly 65, drives the connecting seat 64 to drive the gas sensor 67 to move horizontally to a position. The gas sensor 67 scans and detects the welds, flange connections, valve interfaces and other parts of the pipeline where leakage may occur, and senses the detection gas leaking outside the pipeline. The gas sensor 67 sends the detection data to the controller 4. The controller 4 determines whether there is a leak in the pipeline based on the gas concentration value detected by the gas sensor 67. If the detected halogen gas concentration exceeds a preset threshold, it indicates that there is a leak in the pipeline near the detection point. Step 10: After the inspection is completed, the bottom gas pump 3 collects the inspection gas inside the pipeline workpiece to be inspected, and then diverts it through the electronically controlled diverter valve 9 and discharges it into the gas cylinder 8 for re-storage, so as to facilitate subsequent reuse; Step 11: The first motor 52 drives the first trough shell 53 to rotate downward, and the third motor 524 drives the second fixing frame 525 to move rearward through the second screw assembly 523, so that the rear docking joint 528 is disengaged from the pipe workpiece, so that the staff can remove the pipe workpiece.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high pressure pipeline air tightness detection device, characterized in that: include: Mounting frame (1); A gas cylinder storage box (2) installed in the middle of the rear side of the installation frame (1); A gas pump (3), wherein the number of the gas pumps (3) is two, and the two gas pumps (3) are respectively installed on the upper and lower sides of the gas cylinder storage box (2); A controller (4) is mounted on the left side of the outer side of the mounting frame (1), and the controller (4) is electrically connected to the controller (4); A workpiece mechanism (5) is mounted on the inner bottom of the mounting frame (1); An external gas collection mechanism (6) is mounted on the front end of the top inner side of the mounting frame (1); A gas cylinder fixing frame (7) mounted on the front side of the inner cavity of the gas cylinder storage box (2); Gas cylinders (8), the number of the gas cylinders (8) being two, and the two gas cylinders (8) being mounted on the left and right sides of the interior of the gas cylinder fixing frame (7) respectively; An electrically controlled diverter valve (9) is mounted on the top front side of the inner cavity of the gas cylinder storage box (2); the electrically controlled diverter valve (9) is connected to the gas cylinder (8) via a pipeline; the electrically controlled diverter valve (9) is connected to upper and lower gas pumps (3) via a pipeline; and the electrically controlled diverter valve (9) is electrically connected to the controller (4).

2. A high pressure pipeline air tightness detection device according to claim 1, characterized in that: The workpiece mechanism (5) comprises: A multi-stage retractor (51), wherein the number of the multi-stage retractors (51) is two, and the two multi-stage retractors (51) are respectively installed at the left and right ends of the inner side of the mounting frame (1) along the front-to-back direction, and the multi-stage retractors (51) are electrically connected to the controller (4); A first motor (52) is mounted outside the telescopic end of the left multi-stage telescopic device (51), and the first motor (52) is electrically connected to the controller (4); The first tank shell (53) is rotatably connected to the inner sides of the telescopic ends of the two left and right multi-stage telescopes (51) via a bearing in the left-right direction, and the rotating end of the first motor (52) is connected to the left end of the axis of the first tank shell (53); A movable slide (54) installed in the inner cavity of the first tank shell (53) along the left-right direction; A first screw assembly (55) is arranged in the inner cavity of the first slot housing (53) along the left-right direction and is located on the inner side of the movable slide (54), wherein the screw nut in the first screw assembly (55) is connected to the movable end of the movable slide (54); a second motor (56) mounted on the left side of the top end of the first tank shell (53), the rotating end of the second motor (56) extending into the inner cavity of the first tank shell (53), and the second motor (56) being electrically connected to the controller (4); A bevel gear set (57), one end of which is mounted on the rotating end of the second motor (56), and the other end of which is connected to the left end of the axis of the lead screw in the first lead screw assembly (55); A linear motor (58) is mounted on the bottom of the moving end of the moving slide (54), and the linear motor (58) is electrically connected to the controller (4).

3. A high pressure pipeline air tightness detection device according to claim 1, characterized in that: The workpiece mechanism (5) further comprises: A fixing frame (59) is installed at the bottom of the lifting end of the linear motor (58) in the up-down direction; A slot housing (510) is rotatably connected to the outer bottom of the fixing frame (59) via a rotating shaft seat in the front-to-back direction; A first electric telescopic rod (511), one end of which is rotatably connected to the front top of the slot housing (510) via a rotating shaft seat, the other end of the first electric telescopic rod (511) is rotatably connected to the top of the slot housing (510) via the rotating shaft seat, and the first electric telescopic rod (511) is electrically connected to the controller (4); A second electric telescopic rod (512) is installed in the inner cavity of the slot housing (510) along the front-to-back direction, and the second electric telescopic rod (512) is electrically connected to the controller (4); A movable frame (513) is inserted into the bottom of the slot housing (510) along the front-to-back direction, and a telescopic end of the second electric telescopic rod (512) extends out of the slot housing (510) and is connected to the top front side of the movable frame (513); A rotating housing (514) is rotatably connected to the outer front end of the moving frame (513) via a rotating shaft seat; A third electric telescopic rod (515), one end of which is rotatably connected to the rear side of the bottom end of the mobile frame (513) via a rotating shaft seat, the other end of the third electric telescopic rod (515) is rotatably connected to the inner side of the rotating housing (514) via a rotating shaft, and the third electric telescopic rod (515) is electrically connected to the controller (4); A connecting frame (516) rotatably connected to the inner front end of the rotating housing (514) via a rotating shaft in an up-down direction; Limit rods (517), the number of the limit rods (517) being two, one end of the two limit rods (517) being rotatably connected to the front sides of the left and right ends of the inner side of the rotating housing (514) via a rotating shaft; Connecting rods (518), the number of the connecting rods (518) being two, one end of the two connecting rods (518) being rotatably connected to the inner sides of the other ends of the two limiting rods (517) respectively via rotating shafts; A fourth electric telescopic rod (519), wherein the number of the fourth electric telescopic rods (519) is two, one end of the two fourth electric telescopic rods (519) is rotatably connected to the rear sides of the left and right ends of the inner sides of the two rotating shells (514) through a rotating shaft, and the telescopic ends of the two fourth electric telescopic rods (519) are rotatably connected to the outside of the axis of the rotating shaft at the connection position of the left and right limit rods (517) and the connecting rod (518) through a bearing, and the fourth electric telescopic rod (519) is electrically connected to the controller (4).

4. A high pressure pipeline air tightness detection device according to claim 3, characterized in that: The workpiece mechanism (5) further comprises: An installation truss (520) is installed at the bottom of the connecting frame (516) along the front-to-back direction; A first fixing frame (521) is installed on the front side of the bottom end of the installation truss (520); A first guide rail assembly (522) is installed at the rear side of the bottom end of the installation truss (520) along the front-to-back direction; A second lead screw assembly (523) is mounted on the bottom end of the mounting truss (520) via a bearing seat in the front-to-rear direction and is located outside the first guide rail assembly (522); A third motor (524) is mounted on the rear side of the bottom end of the mounting truss (520), the rotating end of the third motor (524) is connected to the rear end of the axis of the lead screw in the second lead screw assembly (523), and the third motor (524) is electrically connected to the controller (4); A second fixing frame (525) is mounted on the bottom of the limiting end of the second electric telescopic rod (512), and the second fixing frame (525) is connected to the lead screw nut in the second lead screw assembly (523); A mounting seat (526), ​​wherein the number of the mounting seats (526) is two, and the two connecting frames (516) are respectively mounted on the bottom of the first fixing frame (521) and the bottom of the second fixing frame (525); A sealing gasket (527), wherein the number of the sealing gaskets (527) is two, and the two limiting rods (517) are respectively arranged on the inner sides of the two mounting seats (526); A butt joint (528), wherein the number of the butt joints (528) is two, and the two butt joints (528) are respectively arranged on the inner sides of the two sealing pads (527).

5. A high pressure pipeline air tightness detection device according to claim 4, characterized in that: The workpiece mechanism (5) further comprises: A mounting frame (529), wherein the number of the mounting frames (529) is two, and the two fourth electric telescopic rods (519) are respectively arranged at the middle of the front and rear sides of the mounting truss (520); A mounting plate (530), wherein the number of the mounting plates (530) is two, and the two mounting plates (530) are rotatably connected to the outer bottoms of the left and right mounting frames (529) respectively through a rotating shaft seat; A fifth electric telescopic rod (531), the number of the mounting plates (530) being two, the two mounting plates (530) being rotatably connected to the inner middle parts of the left and right mounting frames (529) respectively via a rotating shaft seat, the telescopic ends of the two fifth electric telescopic rods (531) being rotatably connected to the tops of the left and right mounting plates (530) respectively via the rotating shaft seat, and the fifth electric telescopic rod (531) being electrically connected to the controller (4); A rotating seat (532), wherein the number of the rotating seats (532) is two, and the two first motors (52) are respectively mounted on the outer sides of the bottom ends of the left and right mounting plates (530); A driving wheel (533), wherein the number of the driving wheels (533) is two, and the two driving wheels (533) are respectively mounted on the rotating ends of the left and right rotating seats (532), and the driving wheel (533) is electrically connected to the controller (4).

6. A high pressure pipeline air tightness detection device according to claim 5, characterized in that: The external gas collection mechanism (6) comprises: Scissor-type telescopic modules (61), the number of the scissor-type telescopic modules (61) being two, the two scissor-type telescopic modules (61) being respectively arranged on the left and right sides of the inner top front end of the mounting frame (1), the scissor-type telescopic modules (61) being electrically connected to the controller (4); A second tank shell (62) is installed along the left-right direction at the bottom of the lifting ends of the two left and right scissor-type telescopic modules (61); A second guide rail assembly (63), the number of the second guide rail assembly (63) being two, and the two second guide rail assemblies (63) being respectively arranged at the upper and lower ends of the rear side of the second tank shell (62) in the left-right direction; A connecting seat (64) is arranged at the rear side of the limiting ends of the upper and lower second guide rail assemblies (63); A third screw assembly (65) is rotatably arranged on the rear side of the second slot housing (62) via a rotating shaft seat in the left-right direction and is located inside the upper and lower second guide rail assemblies (63), wherein a screw nut in the third screw assembly (65) is connected to the rear side of the connecting seat (64); a fourth motor (66) disposed at the rear left end of the second tank housing (62), the rotating end of the fourth motor (66) being connected to the left end of the axis of the lead screw in the third lead screw assembly (65), and the fourth motor (66) being electrically connected to the controller (4); The gas sensor (67) is arranged at the bottom of the gas sensor (67), and the gas sensor (67) and the controller (4) are electrically connected.

7. A high-pressure pipeline airtightness detection method, which is applied to a high-pressure pipeline airtightness detection device as claimed in claim 6, characterized in that: Use the following steps: Step 1: The staff installs the gas cylinder (8) containing sulfur hexafluoride halogen gas inside the gas cylinder fixing frame (7), connects the internal pipes in the bottom and top gas pumps (3) to the front and rear joints (528) respectively, and thoroughly cleans the high-pressure pipeline workpiece to be tested to remove impurities, oil stains and moisture inside to prevent them from interfering with the distribution and detection of the halogen gas, and places it at a designated position on the front side of the device; Step 2: The multi-stage telescopic devices (51) on the left and right sides extend to drive the first trough shell (53) to move forward, so as to drive the front and rear docking joints (528) to move to a designated position above the workpiece under the cooperation of the first trough shell (53) and the structure below it, and the first motor (52) drives the first trough shell (53) to rotate, so that the first trough shell (53) is turned over to a downward position inside the telescopic ends of the multi-stage telescopic devices (51) on the left and right sides; Step 3: The second motor (56) is driven by the bevel gear set (57) and the first screw assembly (55), so that the internal moving end of the movable slide (54) drives the linear motor (58) to move horizontally to a position, and the linear motor (58) drives the fixed frame (59) to rise and fall to a height position, thereby realizing horizontal position adjustment; Step 4: The first electric telescopic rod (511) drives the slot housing (510) to rotate upward or downward to an angle position at the bottom of the fixed frame (59), the second electric telescopic rod (512) extends and shortens to drive the moving frame (513) to move forward or backward at the bottom of the slot housing (510), the third electric telescopic rod (515) extends and shortens to drive the rotating housing (514) to rotate upward or downward to an angle position outside the moving frame (513), the fourth electric telescopic rods (519) on the left and right sides extend and shorten to drive the rotating housing (514) to rotate upward or downward to an angle position. The upper limit rods (517) at the corresponding positions on both sides are driven to rotate forward or backward inside the rotating shell (514), and under the cooperation of the limit rods (517) on both sides, one end of the connecting rods (518) on both sides is driven to move forward or backward, and then under the cooperation of the connecting rods (518) on both sides, the connecting frame (516) is driven to rotate to the left or right side at the front end inside the rotating shell (514) to a direction, and then under the cooperation of the truss (520) installed below, the front and rear side joints (528) are driven to align with the two ends of the workpiece, Step 5: The lower docking joint (528) of the front first fixing frame (521) is inserted into the interior of the front end of the pipeline workpiece to be inspected for docking, and the third motor (524) drives the second fixing frame (525) to move forward and backward to a position through the second screw assembly (523), so that the sealing gasket (527) below the second fixing frame (525) contacts the position of the pipeline end of the pipeline workpiece to be inspected, and the lower docking joint (528) is inserted into the interior of the rear end of the pipeline workpiece to be inspected for docking; Step 6: The first motor (52) drives the first tank shell (53) to rotate in the opposite direction, so that the pipeline workpiece to be inspected inside the two side joints (528) rotates upward to a vertical state, and the first fixing frames (521) on the left and right sides are shortened so that the pipeline workpiece to be inspected moves backward to the inner side of the installation frame (1); Step 7: The fifth electric telescopic rod (531) drives the mounting plate (530) to rotate toward the front side inside the mounting frame (529), so as to drive the driving wheel (533) to contact the outer wall of the pipeline workpiece to be inspected with the cooperation of the rotating seat (532); Step 8: The top gas pump (3) discharges the test gas stored in the gas cylinder (8) into the interior of the pipeline workpiece to be tested under the diversion of the electric-controlled diverter valve (9), and the motors inside the driving wheels (533) on the left and right sides drive the rollers to rotate, so that the pipeline workpiece to be tested is driven to rotate by the rollers inside the driving wheels (533) in cooperation with the sealing pads (527) on the upper and lower sides, so as to realize circumferential detection of the pipeline workpiece to be tested; Step nine: the left and right scissor-type telescopic modules (61) drive the second tank shell (62) to rise and fall to a height position, and the fourth motor (66) drives the connecting seat (64) in cooperation with the third screw assembly (65) to drive the gas sensor (67) to move to a position in the left and right horizontal directions, and the gas sensor (67) scans and detects the welds, flange connections, valve interfaces and other parts of the pipeline where leakage may occur, and senses the detection gas leaking from the outside of the pipeline, and the gas sensor (67) sends the detection data to the controller (4), and the controller (4) determines whether there is a leak in the pipeline based on the gas concentration value detected by the gas sensor (67). If the detected halogen gas concentration exceeds a preset threshold, it indicates that there is a leak in the pipeline near the detection point; Step 10: After the inspection is completed, the bottom gas pump (3) collects the inspection gas inside the pipeline workpiece to be inspected, and then diverts it through the electronically controlled diverter valve (9) and discharges it into the gas cylinder (8) for re-storage, so as to facilitate subsequent reuse; Step 11: The first motor (52) drives the first tank housing (53) to rotate downward, and the third motor (524) drives the second fixing frame (525) to move rearward through the second screw assembly (523), so that the rear docking joint (528) is disengaged from the pipe workpiece, so that the staff can remove the pipe workpiece.

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