Automatic detection device and method for radiography of high-altitude pressure pipeline

Abstract

The invention discloses an automatic detection device and method for radiography of a high-altitude pressure pipeline. Pipe clamps of the device are arranged on the two sides of a welding seam of the high-altitude pressure pipeline, a connecting support is arranged on the top faces of the pipe clamps, a ray detection instrument is arranged on the connecting support, and a base is arranged on the bottom faces of the pipe clamps; the X-ray film cassette storage lead box and the X-ray film cassette storage lead box are arranged on the two sides of the base respectively, the ball screw mechanism is arranged on the base, and the two ends of the ball screw mechanism abut against the X-ray film cassette storage lead box and the X-ray film cassette storage lead box. The clamping mechanism is arranged on the ball screw mechanism, is driven by the ball screw mechanism to take out the radiographic film cassette from the radiographic film cassette storage lead box and then clings to the welding seam of the high-altitude pressure pipeline, and the radiographic film cassette is fed into the radiographic film cassette storage lead box through the clamping mechanism after being photographed and exposed by a radiographic detection instrument, so that radiographic detection of the welding seam is completed. The device and the method realize automatic operation, completely eradicate the potential safety hazard of detection operation, improve the detection efficiency and reduce the detection cost.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, and in particular to an automatic testing device and method for radiography of high-altitude pressure pipelines. Background Art

[0002] Radiographic testing uses a beam of radiation to penetrate an object. When there are defects in a local area of ​​the object or there are differences in the structure, the attenuation of the object to the radiation will change, making the intensity of the transmitted radiation different in different parts. By detecting the intensity of the transmitted radiation through a detector (such as film in radiography), the defects and material distribution inside the object can be determined, thereby completing the inspection of the object being inspected. Radiographic testing is suitable for various materials, such as cast iron, carbon steel and alloy steel, non-ferrous metals and their alloys, plastics, ceramics, etc. It is sensitive to volume defects and is mainly used to detect internal defects of workpieces. Defects that may occur inside the metal, such as pores, pinholes, inclusions, looseness, cracks, segregation, incomplete penetration or insufficient fusion, can all be effectively detected. Radiographic testing is widely used in industries such as special equipment, aerospace, ships, weapons, hydraulic equipment or bridge steel structures.

[0003] Radiographic testing should strictly comply with the process regulations. First, the workpiece to be inspected should be inspected and cleaned. If there are any attachments on the workpiece that hinder the suspected penetration or hinder the patch, such as equipment accessories, thermal insulation materials, etc., they should be removed as much as possible. Secondly, marking, marking on the workpiece according to the inspection position, proportion, and one-time exposure length specified in the radiographic testing process. When using double-wall single-shadow exposure, it is only necessary to mark on one side of the workpiece (film side). Third, the placement of image quality meters and marks, the placement of image quality meters and various lead type marks in accordance with the relevant provisions of standards and processes. Fourth, the attachment of radiation film, using a reliable method to fix the film cassette at the inspected position, the film cassette should fit closely to the surface of the workpiece, and try to leave no gap. Fifth, focus and scattered radiation protection, place the radiation source in an appropriate position, align the center of the radiation beam with the center of the inspected area, and make the focal length meet the process regulations; scattered radiation protection, implement scattered radiation protection measures according to the relevant process regulations, such as adding lead boxes and lead plates to protect radiation films and other scattered radiation protection measures. Finally, exposure. After the above steps are completed and the radiation protection safety of the on-site personnel is confirmed to meet the requirements, exposure can be carried out according to the parameters specified in the process and the instrument operating procedures. The completion of exposure means that the entire on-site radiography process is completed, and the exposed film should be processed in the darkroom in time.

[0004] Radiation has biological effects on the human body and is harmful to human health. When performing flaw detection, relevant safety operating procedures should be followed and necessary protective measures should be taken.

[0005] When radiographically inspecting the butt joints of pressure pipes, appropriate exposure curves should be selected according to the radiographic equipment, film, intensifying screen and other specific conditions to achieve the exposure required by the standard. The choice of transillumination method can generally be double-wall single-projection segmented transillumination. According to the standard, the number of segmented transilluminations can reach more than 10 times at most to meet the inspection requirements of 100% full coverage of the entire pressure pipe butt joint.

[0006] Since most pressure pipelines are arranged overhead at high altitudes, the difficulty of radiographic inspection increases, and a testing platform needs to be set up to facilitate the inspection operation. Generally, for radiographic inspection of pressure pipeline butt joints, inspectors must go up to the inspection platform to perform inspection operations such as marking, placement of radiographic instruments, focusing, and placement of radiographic film cassettes, and then evacuate the inspection platform to enter a safe protection distance or a protective shielding location before performing radiographic exposure inspection operations. After the exposure is completed, the inspectors need to go up to the inspection platform again to collect the exposed radiographic film cassettes and repeat the entire process of radiographic inspection. Therefore, repeatedly going up to the inspection platform seriously reduces the efficiency of the inspection operation, and there are certain safety hazards. The construction of the inspection platform increases the inspection cost. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an automatic detection device and method for high-altitude pressure pipeline radiography. The device and method realize automated operation, reduce the number of times the detection personnel must go to the operating platform for each radiography, which is beneficial to the safety of the detection personnel, eliminates the potential safety hazards of the detection operation, and can improve the efficiency of pressure pipeline radiography and reduce the detection cost.

[0008] In order to solve the above technical problems, the automatic detection device for radiography of high-altitude pressure pipelines of the present invention comprises a pipe clamp, a connecting bracket, a radiation detection instrument, a base, a ball screw mechanism, a clamping mechanism, a radiation film cassette storage lead box and a radiation film cassette storage lead box, wherein the pipe clamp is arranged on both sides of the weld of the high-altitude pressure pipeline, the connecting bracket is arranged on the top surface of the pipe clamp, the radiation detection instrument is arranged on the connecting bracket, the base is arranged on the bottom surface of the pipe clamp, the radiation film cassette storage lead box and the radiation film cassette storage lead box are respectively arranged on both sides of the base, the ball screw mechanism is arranged on the base and its two ends are close to the radiation film cassette storage lead box and the radiation film cassette storage lead box, the clamping mechanism is arranged on the ball screw mechanism and driven by the ball screw mechanism to take out the radiation film cassette from the radiation film cassette storage lead box and then close to the weld of the high-altitude pressure pipeline, and after being photographed and exposed by the radiation detection instrument, it is sent into the radiation film cassette storage lead box through the clamping mechanism.

[0009] Furthermore, the ball screw mechanism includes a bearing support seat, a screw, a slider, a coupling and a transverse motor, the bearing support seat is arranged on both sides of the base, the screw is arranged on the bearing support seat, the slider is arranged on the screw and a ball is arranged between the slider and the screw, the coupling is arranged at one end of the screw, and the transverse motor is arranged on the base and connected to the coupling.

[0010] Furthermore, the clamping mechanism includes a clamping control slide rail, a clamping control motor, a connecting rod type flipping mechanism and a pair of clamping robots. The clamping control slide rail is arranged on the ball screw mechanism, and the pair of clamping robots are arranged on the clamping control slide rail. The clamping control motor is arranged on the clamping control slide rail and controls the clamping action of the pair of clamping robots, and the connecting rod type flipping mechanism is arranged on the ball screw mechanism and controls the flipping action.

[0011] Furthermore, the X-ray film cassette storage lead box includes a storage box body, a longitudinal partition, a transmission rod, a cam, a box taking motor, a pressure plate, a spring, a lifting box door and a lifting motor. The longitudinal partition is arranged in the storage box body and has a gap at the bottom. The transmission rod is vertically arranged in the storage box body on one side of the longitudinal partition and the top end extends out of the storage box body to connect the box taking motor. The cam is arranged at the bottom end of the transmission rod and is driven by the box taking motor to rotate in the gap at the bottom of the longitudinal partition. The spring is arranged in the storage box body on the other side of the longitudinal partition and the top end is connected to the box top and the bottom end is connected to the pressure plate. The lifting box door is arranged on the side of the storage box body on the other side of the longitudinal partition. The lifting motor is arranged on the side of the storage box body and drives the lifting box door.

[0012] Furthermore, a slide groove is provided on the side of the storage box body, the lifting box door is located in the slide groove, a rack is provided on the side of the lifting box door, a gear is provided on the shaft end of the lifting motor, the rack meshes with the gear and drives the lifting box door to rise and fall along the slide groove.

[0013] Furthermore, the X-ray film cassette storage lead box includes a storage box body, an arc-shaped wedge block, a lifting box door and a lifting motor. The lifting box door is arranged on the side of the storage box body, the lifting motor is arranged on the side of the storage box body and drives the lifting box door, and the arc-shaped wedge block is arranged on the bottom surface of the storage box body and is close to the lifting box door.

[0014] Furthermore, a slide groove is provided on the side of the storage box body, the lifting box door is located in the slide groove, a rack is provided on the side of the lifting box door, a gear is provided on the shaft end of the lifting motor, the rack meshes with the gear and drives the lifting box door to rise and fall along the slide groove.

[0015] An automatic detection method for radiography of high-altitude pressure pipelines based on the above device comprises the following steps: Step 1: Open the lifting box door through the lifting motor of the X-ray film cassette storage lead box, put the X-ray film cassettes that are well packed and marked in the darkroom into the X-ray film cassette storage lead box in a unified direction and place them under the pressure plate, and close the lifting box door by pressing with the help of a spring; Step 2: The device is installed on both sides of the weld of the high-altitude pressure pipeline by means of a pipe clamp, and the lifting door of the X-ray film cassette storage lead box is opened. The box taking motor of the X-ray film cassette storage lead box drives the transmission rod and the cam to rotate. When the cam rotates to the gap at the bottom of the longitudinal partition, the X-ray film cassette stored in the X-ray film cassette storage lead box is pushed out of the X-ray film cassette storage lead box; Step 3: The ball screw mechanism drives the clamping mechanism to move to the lead box for storing the X-ray film cassette, and clamps the X-ray film cassette to move to the weld position of the high-altitude pressure pipeline, and fits the X-ray film cassette to the weld position, waiting for radiographic exposure; Step 4: Start the radiation detection instrument to perform radiographic exposure on the radiation film cassette. After the radiographic exposure is completed, the clamping mechanism flips the radiation film cassette and drives it to the radiation film cassette storage lead box through the ball screw mechanism; Step 5: The lifting motor of the X-ray film cassette storage lead box drives the lifting box door to open, the clamping mechanism extends the X-ray film cassette into the X-ray film cassette storage lead box and places it on the arc wedge, the X-ray film cassette slides into the X-ray film cassette storage lead box under the action of gravity, the lifting box door of the X-ray film cassette storage lead box is closed, and the radiographic inspection of the high-altitude pressure pipeline weld is completed; Step 6. Loosen the pipe clamp and move the device to the next high-altitude pressure pipeline weld position to be inspected, and repeat steps 2 to 6 to perform radiographic inspection of the high-altitude pressure pipeline weld until the radiographic inspection of the entire high-altitude pressure pipeline is completed. Since the automatic detection device and method for radiography of high-altitude pressure pipelines of the present invention adopts the above technical scheme, that is, the pipe clamp of the device is arranged on both sides of the weld of the high-altitude pressure pipeline, the connecting bracket is arranged on the top surface of the pipe clamp, the radiation detection instrument is arranged on the connecting bracket, the base is arranged on the bottom surface of the pipe clamp, the radiation film cassette storage lead box and the radiation film cassette storage lead box are arranged on both sides of the base respectively, the ball screw mechanism is arranged on the base and the two ends are close to the radiation film cassette storage lead box and the radiation film cassette storage lead box, the clamping mechanism is arranged on the ball screw mechanism and driven by the ball screw mechanism to take out the radiation film cassette from the radiation film cassette storage lead box and then close to the weld of the high-altitude pressure pipeline, and after being photographed and exposed by the radiation detection instrument, it is sent to the radiation film cassette storage lead box through the clamping mechanism to complete the radiographic detection of the weld. The device and method realize automatic operation, reduce the number of times the detection personnel must go to the operating platform for each radiography, are beneficial to the safety of the detection personnel, eliminate the safety hazards of the detection operation, and can improve the efficiency of pressure pipeline radiation detection and reduce the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the automatic detection device for radiography of high-altitude pressure pipelines of the present invention; Figure 2 This is a schematic diagram of the arrangement of the lead box for storing and collecting the X-ray film cassettes of the device; Figure 3 This is a schematic diagram of the ball screw mechanism of the device; Figure 4 This is a schematic diagram of the clamping mechanism of the device; Figure 5 This is a schematic diagram of the structure of the lead box for storing X-ray film cassettes in the device; Figure 6 This is a schematic diagram of the structure of the lead box for storing the X-ray film cassette in the device; Figure 7 A schematic diagram of the arrangement of the lifting box doors and lifting motors for storing and collecting lead boxes in the device; Figure 8 A flowchart of the method is shown in FIG. DETAILED DESCRIPTION

[0017] Implementation example Figure 1 and Figure 2 As shown, the automatic detection device for radiography of high-altitude pressure pipelines of the present invention comprises a pipe clamp 1, a connecting bracket 2, a radiation detection instrument 3, a base 4, a ball screw mechanism 5, a clamping mechanism 6, a radiation film cassette storage lead box 7 and a radiation film cassette storage lead box 8, wherein the pipe clamp 1 is arranged on both sides of a weld 92 of a high-altitude pressure pipeline 91, the connecting bracket 2 is arranged on the top surface of the pipe clamp 1, the radiation detection instrument 3 is arranged on the connecting bracket 2, the base 4 is arranged on the bottom surface of the pipe clamp 1, and the radiation film cassette storage lead box 7 is arranged on the bottom surface of the pipe clamp 1. and the X-ray film cassette storage lead box 8 are respectively arranged on both sides of the base 4, the ball screw mechanism 5 is arranged on the base 4 and its two ends are close to the X-ray film cassette storage lead box 7 and the X-ray film cassette storage lead box 8, the clamping mechanism 6 is arranged on the ball screw mechanism 5 and is driven by the ball screw mechanism 5 to take out the X-ray film cassette 70 from the X-ray film cassette storage lead box 7 and then close to the high-altitude pressure pipeline weld 92, and then is photographed and exposed by the X-ray detection instrument 3 and sent into the X-ray film cassette storage lead box 8 through the clamping mechanism 6.

[0018] Preferably, Figure 3As shown, the ball screw mechanism 5 includes a bearing support seat 51, a screw 52, ​​a slider 53, a coupling 54 and a transverse motor 56. The bearing support seat 51 is arranged on both sides of the base 4, the screw 52 is arranged on the bearing support seat 51, the slider 53 is arranged on the screw 52 and a ball 55 is arranged between the slider 53 and the screw 52, ​​the coupling 54 is arranged at one end of the screw 52, ​​and the transverse motor 56 is arranged on the base 4 and connected to the coupling 54.

[0019] Preferably, Figure 4 As shown, the clamping mechanism 6 includes a clamping control slide rail 61, a clamping connecting rod type flipping mechanism 64, a clamping control motor 62 and a pair of clamping manipulators 63. The clamping control slide rail 61 is arranged on the ball screw mechanism 5, and the pair of clamping manipulators 63 are arranged on the clamping control slide rail 61. The connecting rod type flipping mechanism 64 is arranged on the ball screw mechanism 5 and controls the flipping action. The clamping control motor 62 is arranged on the clamping control slide rail 61 and controls the clamping action of the pair of clamping manipulators 63.

[0020] Among them, the connecting rod type flipping mechanism 64 includes a slide rail 65, a slide rail fixing block 66, an eccentric wheel 67, a connecting rod type flipping mechanism substrate 68 and a connecting rod type flipping mechanism control motor 69. The connecting rod type flipping mechanism control motor 69 is arranged on the connecting rod type flipping mechanism substrate 68 and controls the flipping action. The eccentric wheel 67 is arranged at one end of the connecting rod type flipping mechanism control motor 69. The slide rail fixing block 66 is arranged on the rotating shaft of the substrate 68. The slide rail 65 is arranged on the slide rail fixing block 66. The connecting rod type flipping mechanism substrate 68 is arranged on the ball screw mechanism 5.

[0021] Preferably, Figure 5 As shown, the X-ray film cassette storage lead box 7 includes a storage box body 71, a longitudinal partition 72, a transmission rod 73, a cam 74, a box taking motor 75, a pressure plate 76, a spring 77, a lifting box door 78 and a lifting motor 79. The longitudinal partition 72 is arranged in the storage box body 71 and has a gap at the bottom. The transmission rod 73 is vertically arranged in the storage box body 71 on one side of the longitudinal partition 72 and the top end extends out of the storage box body 71 to connect the box taking motor 75. The cam 74 is arranged at the bottom end of the transmission rod 73 and is driven by the box taking motor 75 to rotate in the bottom gap of the longitudinal partition 72. The spring 77 is arranged in the storage box body 71 on the other side of the longitudinal partition 72 and the top end is connected to the box top and the bottom end is connected to the pressure plate 76. The lifting box door 78 is arranged on the side of the storage box body 71 on the other side of the longitudinal partition 72. The lifting motor 79 is arranged on the side of the storage box body 71 and drives the lifting box door 78.

[0022] Preferably, Figure 7As shown, a slide groove is provided on the side of the storage box body 71, and the lifting box door 78 is located in the slide groove. A rack 781 is provided on the side of the lifting box door 78, and a gear 791 is provided on the shaft end of the lifting motor 79. The rack 781 is meshed with the gear 791 and drives the lifting box door 78 to rise and fall along the slide groove.

[0023] Preferably, Figure 6 As shown, the X-ray film cassette storage lead box 8 includes a storage box body 81, an arc-shaped wedge block 82, a lifting box door 83 and a lifting motor 84. The lifting box door 83 is arranged on the side of the storage box body 81, the lifting motor 84 is arranged on the side of the storage box body 81 and drives the lifting box door 83, and the arc-shaped wedge block 82 is arranged on the bottom surface of the storage box body 81 and is close to the lifting box door 83.

[0024] Preferably, Figure 7 As shown, a slide groove is provided on the side of the storage box body 81, and the lifting box door 83 is located in the slide groove. A rack 831 is provided on the side of the lifting box door 83, and a gear 841 is provided on the shaft end of the lifting motor 84. The rack 831 meshes with the gear 841 and drives the lifting box door 83 to rise and fall along the slide groove.

[0025] like Figure 8 As shown, an automatic detection method for high-altitude pressure pipeline radiography based on the above device includes the following steps: Step 1: Open the lifting box door through the lifting motor of the X-ray film cassette storage lead box, put the X-ray film cassettes that are well packed and marked in the darkroom into the X-ray film cassette storage lead box in a unified direction and place them under the pressure plate, and close the lifting box door by pressing with the help of a spring; Step 2: The device is installed on both sides of the weld of the high-altitude pressure pipeline by means of a pipe clamp, and the lifting door of the X-ray film cassette storage lead box is opened. The box taking motor of the X-ray film cassette storage lead box drives the transmission rod and the cam to rotate. When the cam rotates to the gap at the bottom of the longitudinal partition, the X-ray film cassette stored in the X-ray film cassette storage lead box is pushed out of the X-ray film cassette storage lead box; Step 3: The ball screw mechanism drives the clamping mechanism to move to the lead box for storing the X-ray film cassette, and clamps the X-ray film cassette to move to the weld position of the high-altitude pressure pipeline, and fits the X-ray film cassette to the weld position, waiting for radiographic exposure; Step 4: Start the radiation detection instrument to perform radiographic exposure on the radiation film cassette. After the radiographic exposure is completed, the clamping mechanism flips the radiation film cassette and drives it to the radiation film cassette storage lead box through the ball screw mechanism; Step 5: The lifting motor of the X-ray film cassette storage lead box drives the lifting box door to open, the clamping mechanism extends the X-ray film cassette into the X-ray film cassette storage lead box and places it on the arc wedge, the X-ray film cassette slides into the X-ray film cassette storage lead box under the action of gravity, the lifting box door of the X-ray film cassette storage lead box is closed, and the radiographic inspection of the high-altitude pressure pipeline weld is completed; Step 6. Loosen the pipe clamp and move the device to the next high-altitude pressure pipeline weld position to be inspected, and repeat steps 2 to 6 to perform radiographic inspection of the high-altitude pressure pipeline weld until the radiographic inspection of the entire high-altitude pressure pipeline is completed.

[0026] The method controls the radiation detection instrument, the ball screw mechanism, the clamping mechanism, the radiation film cassette storage lead box and the radiation film cassette storage lead box through a control unit, initializes each unit before the detection operation, and sets parameters for the weld position, the planned number of films, etc., and through the operation of the ball screw mechanism and the clamping mechanism, and the opening and closing of the lifting box doors of the radiation film cassette storage lead box and the radiation film cassette storage lead box, the radiation detection instrument can expose the radiation film cassette set at the weld position, thereby completing the radiographic detection of the high-altitude pressure pipeline.

[0027] The device fixes the automatic transmission structure of the radiographic film cassette and the radiographic detection instrument on the high-altitude pressure pipeline through a pipe clamp, a connecting bracket and a base. The device can be rigidly fixed on the high-altitude pressure pipeline, and the radiographic film cassette is taken out from the radiographic film cassette storage lead box by controlling the ball screw mechanism and the clamping mechanism, and the radiographic film cassette is turned over to the weld positioning radiographic detection, and then the exposed radiographic film cassette is sent to the radiographic film cassette storage lead box, so as to realize automatic retrieval of the radiographic film cassette, positioning radiographic detection, and storage of the exposed radiographic film cassette, thereby quickly completing the radiographic detection of the high-altitude pressure pipeline. The device and method are simple to operate, convenient and practical, reduce the detection cost and the risk of accidental exposure of the detection personnel to ionizing radiation, and greatly improve the work efficiency.

Claims

1. An automatic detection device for radiography of high-altitude pressure pipelines, characterized in that: It includes a pipe clamp, a connecting bracket, a radiation detection instrument, a base, a ball screw mechanism, a clamping mechanism, a radiation film cassette storage lead box and a radiation film cassette storage lead box, wherein the pipe clamp is arranged on both sides of the weld of the high-altitude pressure pipeline, the connecting bracket is arranged on the top surface of the pipe clamp, the radiation detection instrument is arranged on the connecting bracket, the base is arranged on the bottom surface of the pipe clamp, the radiation film cassette storage lead box and the radiation film cassette storage lead box are respectively arranged on both sides of the base, the ball screw mechanism is arranged on the base and its two ends are close to the radiation film cassette storage lead box and the radiation film cassette storage lead box, the clamping mechanism is arranged on the ball screw mechanism and is driven by the ball screw mechanism to take out the radiation film cassette from the radiation film cassette storage lead box and then close to the weld of the high-altitude pressure pipeline, and is photographed and exposed by the radiation detection instrument and then sent into the radiation film cassette storage lead box through the clamping mechanism.

2. The automatic detection device for radiography of high-altitude pressure pipelines according to claim 1 is characterized in that: The ball screw mechanism includes a bearing support seat, a screw, a slider, a coupling and a transverse motor. The bearing support seat is arranged on both sides of the base, the screw is arranged on the bearing support seat, the slider is arranged on the screw and a ball is arranged between the slider and the screw, the coupling is arranged at one end of the screw, and the transverse motor is arranged on the base and connected to the coupling.

3. The automatic detection device for high-altitude pressure pipeline radiography according to claim 1 or 2, characterized in that: The clamping mechanism includes a clamping control slide rail, a clamping control motor, a connecting rod type flipping mechanism and a pair of clamping manipulators. The clamping control slide rail is arranged on the ball screw mechanism, and the pair of clamping manipulators are arranged on the clamping control slide rail. The clamping control motor is arranged on the clamping control slide rail and controls the clamping action of the pair of clamping manipulators. The connecting rod type flipping mechanism is arranged on the ball screw mechanism and controls the flipping action.

4. The automatic detection device for radiography of high-altitude pressure pipelines according to claim 1 is characterized in that: The X-ray film cassette storage lead box includes a storage box body, a longitudinal partition, a transmission rod, a cam, a box removal motor, a pressure plate, a spring, a lifting box door and a lifting motor. The longitudinal partition is arranged in the storage box body and has a gap at the bottom. The transmission rod is vertically arranged in the storage box body on one side of the longitudinal partition and the top end extends out of the storage box body to connect with the box removal motor. The cam is arranged at the bottom end of the transmission rod and is driven by the box removal motor to rotate in the gap at the bottom of the longitudinal partition. The spring is arranged in the storage box body on the other side of the longitudinal partition and the top end is connected to the box top and the bottom end is connected to the pressure plate. The lifting box door is arranged on the side of the storage box body on the other side of the longitudinal partition. The lifting motor is arranged on the side of the storage box body and drives the lifting box door.

5. The automatic detection device for radiography of high-altitude pressure pipelines according to claim 4 is characterized in that: A slide groove is provided on the side of the storage box body, the lifting box door is located in the slide groove, a rack is provided on the side of the lifting box door, a gear is provided on the shaft end of the lifting motor, the rack meshes with the gear and drives the lifting box door to rise and fall along the slide groove.

6. The automatic detection device for radiography of high-altitude pressure pipelines according to claim 1 is characterized in that: The X-ray film cassette storage lead box includes a storage box body, an arc-shaped wedge block, a lifting box door and a lifting motor. The lifting box door is arranged on the side of the storage box body, the lifting motor is arranged on the side of the storage box body and drives the lifting box door, and the arc-shaped wedge block is arranged on the bottom surface of the storage box body and is close to the lifting box door.

7. The automatic detection device for radiography of high-altitude pressure pipelines according to claim 6 is characterized in that: A slide groove is provided on the side of the storage box body, the lifting box door is located in the slide groove, a rack is provided on the side of the lifting box door, a gear is provided on the shaft end of the lifting motor, the rack meshes with the gear and drives the lifting box door to rise and fall along the slide groove.

8. An automatic detection method for high-altitude pressure pipeline radiography based on the device according to any one of claims 1 to 7, characterized in that This method comprises the following steps: Step 1: Open the lifting box door through the lifting motor of the X-ray film cassette storage lead box, put the X-ray film cassettes that are well packed and marked in the darkroom into the X-ray film cassette storage lead box in a unified direction and place them under the pressure plate, and close the lifting box door by pressing with the help of a spring; Step 2: The device is installed on both sides of the weld of the high-altitude pressure pipeline by means of a pipe clamp, and the lifting door of the X-ray film cassette storage lead box is opened. The box taking motor of the X-ray film cassette storage lead box drives the transmission rod and the cam to rotate. When the cam rotates to the gap at the bottom of the longitudinal partition, the X-ray film cassette stored in the X-ray film cassette storage lead box is pushed out of the X-ray film cassette storage lead box; Step 3: The ball screw mechanism drives the clamping mechanism to move to the lead box for storing the X-ray film cassette, and clamps the X-ray film cassette to move to the weld position of the high-altitude pressure pipeline, and fits the X-ray film cassette to the weld position, waiting for radiographic exposure; Step 4: Start the radiation detection instrument to perform radiographic exposure on the radiation film cassette. After the radiographic exposure is completed, the clamping mechanism flips the radiation film cassette and drives it to the radiation film cassette storage lead box through the ball screw mechanism; Step 5: The lifting motor of the X-ray film cassette storage lead box drives the lifting box door to open, the clamping mechanism extends the X-ray film cassette into the X-ray film cassette storage lead box and places it on the arc wedge, the X-ray film cassette slides into the X-ray film cassette storage lead box under the action of gravity, the lifting box door of the X-ray film cassette storage lead box is closed, and the radiographic inspection of the high-altitude pressure pipeline weld is completed; Step 6. Loosen the pipe clamp and move the device to the next high-altitude pressure pipeline weld position to be inspected, and repeat steps 2 to 6 to perform radiographic inspection of the high-altitude pressure pipeline weld until the radiographic inspection of the entire high-altitude pressure pipeline is completed.

Images