Thermal insulation layer pipeline PA penetration detection device and process

Abstract

The invention discloses a thermal insulation layer pipeline PA penetration detection device and process in the technical field of pipeline detection, the thermal insulation layer pipeline PA penetration detection device is used for detecting an L-shaped thermal insulation layer elbow main body, and the detection device comprises a clamping mechanism and a penetration detection mechanism; wherein the penetration detection mechanism comprises a support ring and a detection assembly ring arranged on one side of the support ring, the detection assembly ring is rotatably coupled with a connection block through a shaft body, the connection block is provided with a driving part, the connection block is detachably connected with the support ring, the detection assembly ring is provided with a detection part, and the detection part is detachably connected with the support ring. And the detection assembly ring and the support ring are both magnetically attracted with moving parts. According to the invention, automatic continuous penetration detection of the straight pipe section, the arc pipe section and the vertical pipe section of the whole L-shaped heat preservation elbow pipe can be realized, the detection efficiency is obviously improved, errors caused by manual operation are effectively reduced through automatic operation, the detection precision is improved, and the accuracy and reliability of detection data are ensured.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection, specifically to a PA penetration testing device and process for insulation layer pipelines. Background Technology

[0002] Insulated pipes are widely used in industrial fields such as petrochemicals and heating. L-shaped insulated pipe bends are commonly used in insulated pipes. Their structure consists of a straight pipe section, a vertically connected vertical pipe section, and an arc pipe section. They play an important role in scenarios where the pipeline needs to change direction and maintain stable temperature. For example, when the pipeline system needs to bypass building structural obstacles (such as beams, columns, and walls) or avoid other equipment, the L-shaped insulated pipe bend can achieve a compact spatial turn through the smooth transition of the arc pipe section. This ensures the smooth flow of the medium and effectively reduces heat loss or prevents cold bridge effects through a continuous and complete insulation layer.

[0003] To ensure that L-shaped insulated bends meet engineering standards, penetration testing is typically performed on them during production using testing devices. However, traditional testing devices are difficult to adapt to the curved structure of L-shaped bends. Usually, the testing device is manually held and tested in sections along the outer wall of the pipe, which is not only inefficient but also subject to human error and insufficient accuracy. Therefore, we propose a PA penetration testing device and process for insulated pipes. Summary of the Invention

[0004] The purpose of this invention is to provide a PA penetration detection device and process for insulation layer pipes, which solves the technical problems of existing detection devices being unable to adapt to the curved surface structure of L-shaped insulation bends. Usually, the detection device is manually held and inspected in sections along the outer wall of the pipe, which is not only inefficient but also subject to human operation errors and insufficient detection accuracy.

[0005] The present invention achieves the above objectives through the following technical solutions: A PA penetration detection device for insulation layer pipes is used to detect the main body of an L-shaped insulation layer bend. The detection device includes a clamping mechanism for clamping the main body of the insulation layer bend and a penetration detection mechanism sleeved on the outside of the main body of the insulation layer bend. The penetration detection mechanism includes a support ring sleeved on the outer wall of the straight pipe section of the insulation layer bend body, and a detection assembly ring located on one side of the support ring and movably sleeved on the insulation layer bend body. A connecting block is rotatably connected to the detection assembly ring via a shaft. The connecting block is provided with a driving part for driving the shaft to move the detection assembly ring from the outside of the straight pipe section of the insulation layer bend body to the outside of the vertical pipe section of the insulation layer bend body. The connecting block is detachably connected to the support ring. The detection assembly ring is provided with a detection part for detecting the insulation layer bend body. Both the detection assembly ring and the support ring are provided with several sets of magnetic moving parts for driving the support ring to move on the outer wall of the straight pipe section of the insulation layer bend body or driving the detection assembly ring to move on the outer wall of the vertical pipe section of the insulation layer bend body.

[0006] A further improvement is that a magnetic positioning seat is sleeved on the outer side of the connecting block, the magnetic positioning seat is located on the support ring, the magnetic positioning seat and the connecting block are magnetically connected, the surface wall of the support ring is provided with an opening below the magnetic positioning seat, and a rotating shaft is rotatably provided in the opening, the rotating shaft and the inner wall of the opening are provided with elastic reset members, and a connecting rope is wound on the outer wall of the rotating shaft, one end of the connecting rope passes through the support ring and the magnetic positioning seat and then connects to the connecting block.

[0007] A further improvement is that the connecting block is movably sleeved on the outer wall of the shaft body, the end of the shaft body is fixedly connected to the detection assembly ring, and a rotating device is provided inside the connecting block. The output end of the rotating device is connected to the shaft body through a gear set.

[0008] A further improvement is that the detection unit includes a rotating ring rotatably disposed on the inner wall of the detection assembly ring, several sets of support plates arranged in a circular array on the rotating ring, a telescopic device 1 disposed on the support plates, and a PA probe body connected to the output end of the telescopic device 1 and facing the center of the rotating ring. The outer wall of the detection assembly ring is provided with a rotating device 2, the output end of the rotating device 2 being connected to the rotating ring in a transmission manner to drive the rotating ring to rotate.

[0009] A further improvement is that the magnetic moving part includes a telescopic device two, a mounting base located at the output end of the telescopic device two, a magnetic roller rotatably located in the mounting base for magnetically contacting the outer wall of the insulation layer bend, and a micro motor located on the mounting base for driving the magnetic roller to rotate.

[0010] A further improvement is that the magnetic roller includes a wheel body, and magnetic rubber rings are fitted at both ends of the outer wall of the wheel body. The outer circumference of the magnetic rubber rings is integrally formed with several protrusions, and an annular magnet is provided on the outer wall of the wheel body between the two magnetic rubber rings.

[0011] A further improvement is that the connecting block is equipped with a detector, which is used to detect the position of the support ring on the outer wall of the straight pipe section of the insulation layer bend. When the detector detects that the support ring has moved to a preset position on the outer wall of the straight pipe section of the insulation layer bend, the magnetic moving part on the support ring is controlled to stop working, and the driving part drives the shaft to rotate the detection assembly ring by a preset angle.

[0012] A further improvement is that the clamping mechanism includes an L-shaped support base, on which electric guide rail one and electric guide rail two are respectively provided in the horizontal and vertical sections. Pipe clamping devices are detachably connected to the sliders of electric guide rail one and electric guide rail two, and the two sets of pipe clamping devices clamp the two ends of the insulation layer bend body respectively.

[0013] A process for inspecting the main body of an L-shaped insulation layer bend using the aforementioned detection device includes the following steps: S1: After the support ring is fitted onto the outer wall of the straight pipe section of the insulation layer bend, the magnetic moving part is driven to contact the outer wall of the straight pipe section of the insulation layer bend, and then the insulation layer bend is clamped by the clamping mechanism. S2: The magnetic moving part on the support ring drives the support ring and the detection assembly ring to move along the outer wall of the straight pipe section of the insulation layer bend body. During the movement, the detection part penetrates the outer wall of the straight pipe section of the insulation layer bend body for detection. After moving to the preset position, the magnetic moving part on the support ring stops working. S3: The drive unit drives the shaft to detect the assembly ring relative to the support ring to rotate from the outside of the straight pipe section of the insulation layer bend body to the outside of the vertical pipe section of the insulation layer bend body. During the rotation, the detection unit penetrates the outer wall of the arc pipe section of the insulation layer bend body. After the detection assembly ring rotates to the preset angle, it drives the magnetic moving part on the detection assembly ring to contact the outer wall of the vertical pipe section of the insulation layer bend body. S4: The magnetic moving part on the detection assembly ring drives the detection assembly ring to move on the outer wall of the vertical pipe section of the main body of the insulation layer bend, and causes the connecting block to separate from the support ring. During the movement, the detection part penetrates the outer wall of the vertical pipe section of the main body of the insulation layer bend for detection.

[0014] The beneficial effects of this invention are as follows: This invention uses a magnetically movable part on the support ring to drive the support ring and the detection assembly ring to move automatically along the outer wall of the straight pipe section of the main body of the L-shaped insulated bend. After the detection part completes the detection of this section, the drive part controls the shaft to move the detection assembly ring from the outside of the straight pipe section to the outside of the vertical pipe section. During this movement, the detection part simultaneously completes the penetration detection of the outer wall of the arc pipe section. After the detection assembly ring is positioned in the vertical pipe section, the magnetically movable part on the detection assembly ring continues to drive it to move along the outer wall of the vertical pipe section, and the detection part completes the detection of this section. This achieves automated and continuous penetration detection of the entire straight pipe section, arc pipe section, and vertical pipe section of the L-shaped insulated bend. This not only significantly improves the detection efficiency but also effectively reduces the error caused by human operation through automated operation, improves the detection accuracy, and ensures the accuracy and reliability of the detection data. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the L-shaped insulation layer bend detected by the detection device of the present invention; Figure 2 This is a schematic diagram of the support ring and detection assembly ring located on the outer wall of the straight pipe section of the main body of the heat insulation layer bend in this invention. Figure 3 This is a schematic diagram of the detection assembly ring flipping structure in this invention; Figure 4 This is a schematic diagram of the structure of the detection assembly ring located on the outer wall of the vertical pipe section of the main body of the insulation layer bend in this invention; Figure 5 For the present invention Figure 2 An enlarged schematic diagram of structure A in the image.

[0016] In the diagram: 100, Insulation layer bend body; 200, Clamping mechanism; 201, Support base; 202, Electric guide rail one; 203, Electric guide rail two; 204, Pipe clamping device; 300, Penetration detection mechanism; 301, Support ring; 302, Connecting block; 303, Shaft; 304, Rotating device one; 305, Magnetic positioning seat; 306, Rotating shaft; 307, Connecting rope; 308, Detection assembly ring; 309, Telescopic device one; 310, PA probe body; 311, Rotating ring; 312, Rotating device two; 313, Detector; 314, Telescopic device two; 315, Mounting base; 316, Magnetic rubber ring; 317, Ring magnet. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1 Please see the appendix Figure 1-2 A PA penetration detection device for insulation layer pipes is used to detect L-shaped insulation layer bend body 100. L-shaped insulation layer bend body 100 is one of the widely used pipe components in insulation layer pipes. Its structure is usually composed of a straight pipe section, a vertically connected vertical pipe section, and an arc pipe section connecting the two. Please see the appendix Figure 2-5 The detection device includes a clamping mechanism 200 for clamping the main body 100 of the insulation layer bend and a penetration detection mechanism 300 sleeved on the outside of the main body 100 of the insulation layer bend. The penetration testing mechanism 300 includes a support ring 301 sleeved on the outer wall of the straight section of the insulation layer bend body 100, and a testing assembly ring 308 located on one side of the support ring 301 and movably sleeved on the insulation layer bend body 100. The diameters of both the support ring 301 and the testing assembly ring 308 are larger than the diameter of the insulation layer bend body 100, facilitating subsequent flipping of the testing assembly ring 308 while adapting to penetration testing of insulation layer bend bodies 100 of various specifications. A shaft 3... 03 The rotating shaft is connected to a connecting block 302, which has a U-shaped cross-section. A bearing is provided at the connection point between the connecting block 302 and the shaft body 303. The shaft body 303 is fixedly connected to the detection assembly ring 308. The connecting block 302 is equipped with a driving part for driving the shaft body 303 to move the detection assembly ring 308 from the outside of the straight pipe section of the insulation layer bend body 100 to the outside of the vertical pipe section of the insulation layer bend body 100. Initially, both the detection assembly ring 308 and the support ring 301 are located on the outer wall of the straight pipe section of the insulation layer bend body 100 (as shown in the attached diagram). Figure 2 As shown in the attached diagram, after the support ring 301 moves to the preset position on the outer wall of the straight pipe section of the insulation layer bend body 100, the drive unit drives the shaft 303 to rotate the detection assembly ring 308 relative to the support ring 301, so that the detection assembly ring 308 moves to perform penetration detection on the outer wall of the arc pipe section of the insulation layer bend body 100 (as shown in the attached diagram). Figure 3 As shown), until the detection assembly ring 308 moves to the outer wall of the vertical pipe section of the insulation layer bend body 100, that is, the detection assembly ring 308 is perpendicular to the axis of the support ring 301 (as shown in the attached figure). Figure 4 (as shown) The connecting block 302 is detachably connected to the support ring 301, so that the connecting block 302 can be separated from the support ring 301. The inspection assembly ring 308 is provided with an inspection part for inspecting the insulation layer bend body 100. This inspection part is used to perform penetration inspection on the insulation layer bend body 100 to detect whether there are weld defects, structural deformation or corrosion, etc., to ensure that the integrity and insulation performance of the insulation layer bend body 100 meet the engineering standards. Both the inspection assembly ring 308 and the support ring 301 are equipped with several sets of magnetic moving parts (only two sets are shown in the figure, but it is not limited to two sets), which are used to drive the support ring 301 to move on the outer wall of the straight pipe section of the insulation layer bend body 100 or to drive the inspection assembly ring 308 to move on the outer wall of the vertical pipe section of the insulation layer bend body 100. The magnetic moving parts can complete the continuous inspection of the insulation layer bend body 100 without manual assistance, which significantly improves the inspection efficiency and avoids the inspection error caused by manual operation, thereby improving the inspection efficiency and inspection quality.

[0019] Please see the appendix Figure 4 Preferably, in this embodiment, a magnetic positioning seat 305 is sleeved on the outer side of the connecting block 302. The magnetic positioning seat 305 is U-shaped and is located on the support ring 301. The magnetic positioning seat 305 and the connecting block 302 are magnetically connected. For example, the connecting block 302 is made of a magnetically conductive material, while the magnetic positioning seat 305 has a built-in permanent magnet. When the two are close together, they are positioned and fixed by adsorption force without affecting their subsequent separation. The surface of the support ring 301 is provided with an opening below the magnetic positioning seat 305, and a rotating shaft 306 is rotatably provided in the opening. The rotating shaft 306 and the inner wall of the opening are provided with elastic reset elements (such as torsion springs). A connecting pull rope 307 is wound around the outer wall of the rotating shaft 306. One end of the connecting pull rope 307 passes through the support ring 301 and the magnetic positioning seat 305 and is connected to the connecting block 302. The connecting pull rope 307 is used to ensure stable docking between the connecting block 302 and the magnetic positioning seat 305.

[0020] Preferably, in this embodiment, the connecting block 302 is movably sleeved on the outer wall of the shaft 303, and the end of the shaft 303 is fixedly connected to the detection assembly ring 308. The connecting block 302 is provided with a rotating device 304 (such as a micro servo motor). The output end of the rotating device 304 and the shaft 303 are connected by a gear set (such as two sets of meshing gears). The rotating device 304 and the gear set can drive the detection assembly ring 308 to rotate relative to the support ring 301 within a preset angle range (0-90 degrees).

[0021] Preferably, the detection unit of this embodiment includes a rotating ring 311 rotatably disposed on the inner wall of the detection assembly ring 308. The rotating ring 311 is connected to the inner wall of the detection assembly ring 308 via bearings. Several sets of support plates are arranged in a circular array on the rotating ring 311. The support plates are specifically disposed on the outer wall of the rotating ring 311 on the side away from the support ring 301. A telescopic device 309 (such as an electric telescopic rod) is disposed on the support plate. A PA probe body 310 is connected to the output end of the telescopic device 309 and faces the center of the rotating ring 311. The PA probe body 310 is a conventional device in the art, used for non-destructive penetration testing of pipelines, and will not be described in detail here. The PA probe body 310 can be driven to move and the detection distance can be adjusted to adapt to the detection of insulation layer bend body 100 of different specifications. Preferably, in actual practice, a laser rangefinder or capacitive proximity sensor can be set at the end of the PA probe body 310 to control the corresponding telescopic device 309. When it is detected that the distance between the PA probe body 310 and the outer wall of the insulation layer bend body 100 has narrowed and a collision may occur, a signal is sent to the controller. The controller triggers the telescopic device 309 to retract to avoid rigid contact that may cause probe wear or damage to the pipe surface. Of course, it is not limited to this method. It can also be manually adjusted in real time or automatically adjusted according to a set program, etc., which will not be described in detail here.

[0022] The outer wall of the inspection assembly ring 308 is equipped with a rotating device 312 (such as a servo motor). The output end of the rotating device 312 is connected to the rotating ring 311 to drive the rotating ring 311 to rotate. For example, the output end of the rotating device 312 is equipped with a gear, and the outer wall of the rotating ring 311 is equipped with a toothed ring that meshes with the gear. Of course, this is not the only transmission connection method. By rotating the rotating device 312 to drive the rotating ring 311, the PA probe body 310 is driven to perform circumferential penetration detection on the insulation layer bend body 100, thereby improving the detection range.

[0023] Preferably, the magnetic moving part in this embodiment includes a telescopic device 314 (such as an electric telescopic rod), a mounting base 315 located at the output end of the telescopic device 314, the mounting base 315 being U-shaped, a magnetic roller rotatably located within the mounting base 315 for magnetically contacting the outer wall of the insulation layer bend body 100, and a micro motor located on the mounting base 315 for driving the magnetic roller to rotate. The telescopic device 314 drives the magnetic roller to adsorb and contact the outer wall of the insulation layer bend body 100, providing fixation through magnetic attraction. The micro motor drives the magnetic roller to rotate, which in turn moves the support ring 301 or the detection assembly ring 308 on the outer wall of the insulation layer bend body 100. It should be noted that this device uses the magnetic attraction method between the magnetic moving part and the outer wall of the pipe, therefore this device is suitable for non-destructive testing of the insulation layer bend body 100 with a magnetically conductive metal outer protective layer (such as carbon steel, magnetically conductive stainless steel, etc.).

[0024] Preferably, the connecting block 302 in this embodiment is provided with a detector 313. The detector 313 includes, for example, a sensor (such as a distance sensor) electrically connected to an external controller. The detector 313 is used to detect the position of the support ring 301 on the outer wall of the straight pipe section of the insulation layer bend body 100. When the detector 313 detects that the support ring 301 has moved to a preset position on the outer wall of the straight pipe section of the insulation layer bend body 100, it sends a signal to the external controller. The external controller controls the magnetic moving part on the support ring 301 to stop working and causes the driving part to drive the shaft 303 to rotate the detection assembly ring 308 by a preset angle, thereby realizing automatic penetration detection of the insulation layer bend body 100.

[0025] A process for inspecting the main body of an L-shaped insulation layer bend using the aforementioned detection device includes the following steps: S1: After the support ring 301 is fitted onto the outer wall of the straight pipe section of the insulation layer bend body 100, the magnetic moving part is driven to contact the outer wall of the straight pipe section of the insulation layer bend body 100, and then the insulation layer bend body 100 is clamped by the clamping mechanism 200. S2: The magnetic moving part on the support ring 301 drives the support ring 301 and the detection assembly ring 308 to move along the outer wall of the straight pipe section of the insulation layer bend body 100. During the movement, the detection part penetrates the outer wall of the straight pipe section of the insulation layer bend body 100 for detection. After moving to the preset position, the magnetic moving part on the support ring 301 stops working. S3: The drive unit drives the shaft 303 to detect the assembly ring 308 relative to the support ring 301 to rotate from the outside of the straight pipe section of the insulation layer bend body 100 to the outside of the vertical pipe section of the insulation layer bend body 100. During the rotation, the detection unit penetrates the outer wall of the arc pipe section of the insulation layer bend body 100 for detection. After the detection assembly ring 308 rotates to the preset angle, it drives the magnetic moving part on the detection assembly ring 308 to contact the outer wall of the vertical pipe section of the insulation layer bend body 100. S4: The magnetic moving part on the detection assembly ring 308 drives the detection assembly ring 308 to move on the outer wall of the vertical pipe section of the insulation layer bend body 100, and causes the connecting block 302 to separate from the support ring 301. During the movement, the detection part penetrates the outer wall of the vertical pipe section of the insulation layer bend body 100 for detection.

[0026] Example 2 Please see the appendix Figure 4Based on Embodiment 1, the magnetic roller of this embodiment includes a wheel body, and magnetic rubber rings 316 are sleeved on both ends of the outer wall of the wheel body. The magnetic rubber rings 316 are made of magnetic rubber material that is widely used in the art, and the outer circumference of the magnetic rubber rings 316 is integrally formed with several protrusions. The protrusions increase the friction between the magnetic roller and the outer wall of the insulation layer bend body 100. An annular magnet 317 is provided on the outer wall of the wheel body and between the two magnetic rubber rings 316 so as to be attracted to the outer wall of the insulation layer bend body 100.

[0027] Example 3 Please see the appendix Figure 1 Based on Embodiment 1, the clamping mechanism 200 of this embodiment includes an L-shaped support base 201. The horizontal and vertical sections of the support base 201 are respectively provided with an electric guide rail 1 202 and an electric guide rail 203. Both the electric guide rail 1 202 and the electric guide rail 203 are widely used electric guide rails in the field. The electric guide rail is usually composed of a guide rail body, a slider, and a drive system. The sliders of both the electric guide rail 1 202 and the electric guide rail 203 can be detachably connected to pipe clamping devices 204 for easy replacement. The pipe clamping devices 204 are such as three-jaw chucks or other clamps. The two sets of pipe clamping devices 204 respectively clamp the two ends of the insulation layer bend body 100.

[0028] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A PA penetration detection device for insulation layer pipes, used to detect the main body (100) of an L-shaped insulation layer bend, characterized in that, The detection device includes a clamping mechanism (200) for clamping the main body (100) of the insulation layer bend and a penetration detection mechanism (300) sleeved on the outside of the main body (100) of the insulation layer bend. The penetration detection mechanism (300) includes a support ring (301) sleeved on the outer wall of the straight pipe section of the insulation layer bend body (100), and a detection assembly ring (308) located on one side of the support ring (301) and movably sleeved on the insulation layer bend body (100). A connecting block (302) is rotatably connected to the detection assembly ring (308) via a shaft (303). The connecting block (302) is provided with a means to drive the shaft (303) to move the detection assembly ring (308) from the outside of the straight pipe section of the insulation layer bend body (100). The drive part is located on the outside of the vertical pipe section of the insulation layer bend body (100). The connecting block (302) is detachably connected to the support ring (301). The detection assembly ring (308) is provided with a detection part for detecting the insulation layer bend body (100). Both the detection assembly ring (308) and the support ring (301) are provided with several sets of magnetic moving parts for driving the support ring (301) to move on the outer wall of the straight pipe section of the insulation layer bend body (100) or driving the detection assembly ring (308) to move on the outer wall of the vertical pipe section of the insulation layer bend body (100).

2. The detection device according to claim 1, characterized in that, A magnetic positioning seat (305) is sleeved on the outside of the connecting block (302). The magnetic positioning seat (305) is located on the support ring (301). The magnetic positioning seat (305) and the connecting block (302) are magnetically connected. The surface of the support ring (301) is provided with an opening below the magnetic positioning seat (305). A rotating shaft (306) is rotatably provided inside the opening. The rotating shaft (306) and the inner wall of the opening are provided with elastic reset members. A connecting pull rope (307) is wound around the outer wall of the rotating shaft (306). One end of the connecting pull rope (307) passes through the support ring (301) and the magnetic positioning seat (305) and then connects to the connecting block (302).

3. The detection device according to claim 1, characterized in that, The connecting block (302) is movably sleeved on the outer wall of the shaft (303). The end of the shaft (303) is fixedly connected to the detection assembly ring (308). The connecting block (302) is provided with a rotating device (304). The output end of the rotating device (304) and the shaft (303) are connected by a gear set.

4. The detection device according to claim 1, characterized in that, The detection unit includes a rotating ring (311) rotatably disposed on the inner wall of the detection assembly ring (308), several sets of support plates arranged in a ring array on the rotating ring (311), a telescopic device (309) disposed on the support plates, and a PA probe body (310) connected to the output end of the telescopic device (309) and facing the center of the rotating ring (311). The outer wall of the detection assembly ring (308) is provided with a rotating device (312), the output end of the rotating device (312) being connected to the rotating ring (311) in a transmission connection to drive the rotating ring (311) to rotate.

5. The detection device according to claim 1, characterized in that, The magnetic moving part includes a telescopic device two (314), a mounting base (315) located at the output end of the telescopic device two (314), a magnetic roller rotatably located in the mounting base (315) for magnetically contacting the outer wall of the insulation layer bend body (100), and a micro motor located on the mounting base (315) for driving the magnetic roller to rotate.

6. The detection device according to claim 5, characterized in that, The magnetic roller includes a wheel body, and magnetic rubber rings (316) are fitted on both ends of the outer wall of the wheel body. The outer circumference of the magnetic rubber rings (316) is integrally formed with several protrusions. An annular magnet (317) is provided on the outer wall of the wheel body between the two magnetic rubber rings (316).

7. The detection device according to claim 1, characterized in that, The connecting block (302) is equipped with a detector (313). The detector (313) is used to detect the position of the support ring (301) on the outer wall of the straight pipe section of the insulation layer bend body (100). When the detector (313) detects that the support ring (301) has moved to a preset position on the outer wall of the straight pipe section of the insulation layer bend body (100), the magnetic moving part on the support ring (301) is controlled to stop working, and the driving part drives the shaft (303) to drive the detection assembly ring (308) to rotate by a preset angle.

8. The detection device according to claim 1, characterized in that, The clamping mechanism (200) includes an L-shaped support base (201). The support base (201) is provided with an electric guide rail one (202) and an electric guide rail two (203) on its horizontal and vertical sections, respectively. The sliders of the electric guide rail one (202) and the electric guide rail two (203) are detachably connected to pipe clamping devices (204). The two sets of pipe clamping devices (204) clamp the two ends of the insulation layer bend body (100) respectively.

9. A process for inspecting the main body of an L-shaped insulation layer bend using the detection device described in any one of claims 1-8, characterized in that, Includes the following steps: S1: After the support ring (301) is sleeved on the outer wall of the straight pipe section of the insulation layer bend body (100), the magnetic moving part is driven to contact the outer wall of the straight pipe section of the insulation layer bend body (100), and then the insulation layer bend body (100) is clamped by the clamping mechanism (200). S2: The magnetic moving part on the support ring (301) drives the support ring (301) and the detection assembly ring (308) to move along the outer wall of the straight pipe section of the insulation layer bend body (100). During the movement, the detection part penetrates the outer wall of the straight pipe section of the insulation layer bend body (100) for detection. After moving to the preset position, the magnetic moving part on the support ring (301) stops working. S3: The drive unit drives the shaft (303) to detect the assembly ring (308) to flip relative to the support ring (301) from the outside of the straight pipe section of the insulation layer bend body (100) to the outside of the vertical pipe section of the insulation layer bend body (100). During the flipping process, the detection unit penetrates the outer wall of the arc pipe section of the insulation layer bend body (100). After the detection assembly ring (308) flips to the preset angle, it drives the magnetic moving part on the detection assembly ring (308) to contact the outer wall of the vertical pipe section of the insulation layer bend body (100). S4: The magnetic moving part on the detection assembly ring (308) drives the detection assembly ring (308) to move on the outer wall of the vertical pipe section of the insulation layer bend body (100), and causes the connecting block (302) to separate from the support ring (301). During the movement, the detection part penetrates the outer wall of the vertical pipe section of the insulation layer bend body (100) for detection.

Images