Scanning device and method for detecting circumferential weld of GIS (Gas Insulated Switchgear) shell

Abstract

The invention relates to the technical field of welding seam scanning, in particular to a scanning device and method for detecting a GIS shell circumferential welding seam, and the device comprises a top disc, a supporting rod is fixed to the bottom of the top disc, a fixing plate is fixed to the bottom of the supporting rod, a connecting plate is fixed to the surface of the fixing plate, and a bearing disc is fixed to the other end of the connecting plate; a winding belt is arranged at the bottom of the top disc, a jacking plate is fixed to the surface of the winding belt, a sliding groove is formed in the surface of the winding belt, a sliding block is arranged in the winding belt, a gear is arranged on the surface of the sliding block, and a lifting plate is arranged on the surface of the sliding block; the device has the beneficial effects that a gear is arranged on the surface of the sliding block, a driving device is arranged in the sliding block, the driving device drives the gear to rotate, teeth on the surface of the gear are meshed, and when the gear rotates, the sliding block can move in the sliding groove, so that the detection head moves around a welding seam on the surface of the GIS shell, and the detection efficiency is improved. And comprehensive detection of the welding seam is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of weld scanning, in particular to a scanning device and method for detecting the annular weld of a GIS shell. BACKGROUND

[0002] The common processing method of the GIS shell is to roll the aluminum plate into a cylindrical shape and then weld it to form a straight weld, and then weld flanges on both ends of the cylinder to form an annular weld. For the welded shell, in addition to the base material defects, the weld will also produce incomplete penetration, pores and cracks and other welding defects.

[0003] In the prior art, patent number CN110849969B, entitled "Scanning device for on-site detection of GIS shell annular weld". The present application comprises a limiting guide rail, a chain scanning frame, an adjusting length screw and a scanning trolley; the chain scanning frame comprises a plurality of wide chain links, a plurality of connecting pins, a plurality of narrow chain links, a plurality of rollers, a terminal chain link and a trolley connecting chain link, adjacent chain links are connected by connecting pins, and a roller for contacting the GIS shell is installed on each connecting pin; the chain scanning frame is used to fix on one side of the GIS shell annular weld after being formed in a circle, the terminal chain link is provided with an adjusting length screw; the trolley connecting chain link is provided with a scanning trolley, and the length-adjustable chain scanning frame satisfies the detection of the annular weld of GIS shells of different diameters; the scanning trolley is limited by the limiting guide rail, so that the probe can be in good contact with the surfaces of the workpieces on both sides of the weld, and the accuracy of the detection results is improved.

[0004] At present, the detection methods for GIS shells in China mainly include radiographic detection, ultrasonic detection and penetration monitoring detection. When detecting the weld of the GIS shell, one or more groups of ultrasonic probes are needed to scan along the weld, and the handheld probe method is generally used during the detection process, so that the sound beam is difficult to always point in one direction, causing the result to be distorted. SUMMARY

[0005] The purpose of the present application is to provide a scanning device and method for detecting the annular weld of a GIS shell to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a scanning device for detecting the annular weld of a GIS shell, comprising: A top disc is fixed with a support rod at the bottom, the bottom of the support rod is fixed with a fixed plate, the surface of the fixed plate is fixed with a connecting plate, the other end of the connecting plate is fixed with a supporting tray, the bottom of the top disc is provided with a winding belt, the surface of the winding belt is fixed with a top holding plate, the surface of the winding belt is provided with a sliding groove, the inside of the winding belt is provided with a sliding block, the surface of the sliding block is provided with a gear, the surface of the sliding block is provided with a lifting plate, the surface of the lifting plate is provided with a U-shaped plate and a detection head.

[0007] Preferably, the surface of the top disc is provided with a plurality of groups of insertion holes, an insertion rod is inserted into the insertion holes, a nut is screwed on the surface of the insertion rod, a suspension rope is inserted into the insertion rod, the suspension rope can move in and out of the insertion rod, a fixed rod is fixed to the surface of the top disc, a center block is fixed to the other end of the fixed rod, an L-shaped rod is fixed to the surface of the center block, a winding disc is arranged between the two groups of L-shaped rods, and the winding disc can rotate between the L-shaped rods.

[0008] Preferably, one end of the suspension rope is wound around the surface of the winding disc, a driving wheel is arranged on the surface of the center block, the surface of the driving wheel abuts against the surface of the winding disc, a driving device is arranged in the center block, the driving device drives the driving wheel to rotate, and the winding disc rotates with the driving wheel.

[0009] Preferably, the winding belt is provided with two groups of abutment plates, the abutment plates are located at the top and bottom of the winding belt, a sliding groove is arranged between the abutment plates, an insertion belt is fixed to one end of the winding belt, a flexible belt is arranged on the surface of the winding belt, an insertion hole is arranged on the surface of the winding belt, the insertion belt can be inserted into the insertion hole, a first magic tape is arranged on the surface of one end of the winding belt, a second magic tape is arranged on the surface of the insertion belt, the second magic tape can be attached to the surface of the first magic tape, and the insertion belt can move in the insertion hole.

[0010] Preferably, the winding belt is provided with teeth, an adjusting groove is arranged on the surface of the abutment plate, the adjusting groove is provided with two groups of adjusting grooves and is arranged on the surface of the two groups of abutment plates, a sliding block is inserted into the adjusting groove, the sliding block can move in the adjusting groove, a gear is arranged on the surface of the sliding block, the gear can rotate with the sliding block, a rotating device is arranged in the sliding block, the rotating device drives the gear to rotate, the teeth on the surface of the gear are engaged with the teeth, and the gear rotates to move the sliding block in the adjusting groove.

[0011] Preferably, a lifting groove is arranged on the surface of the sliding block, an insertion block is arranged on the surface of the lifting plate and inserted into the lifting groove, the insertion block can move up and down in the lifting groove, the lifting plate moves with the insertion block, a limiting rod is fixed in the lifting groove, the limiting rod is inserted into the interior of the insertion block, the insertion block can move up and down on the surface of the limiting rod, a second spring is arranged on the exterior of the limiting rod, one end of the second spring is connected to the inner wall of the lifting groove, the other end of the second spring is connected to the surface of the insertion block, and the limiting rod is provided with two groups of limiting rods and is arranged at the top and bottom of the insertion block.

[0012] Preferably, the lifting plate is provided with two groups of N-shaped plates, the N-shaped plates move with the sliding block, and the N-shaped plates can move with the lifting plate.

[0013] Preferably, the surface of the lifting plate is fixed with a protective plate, the detection head on the surface of the lifting plate is located inside the protective plate, and the detection head can move with the lifting plate.

[0014] Preferably, the outside of the suspension rope is provided with a first spring, one end of the first spring is connected to the bottom of the top disc, and the other end is connected to the surface of the winding belt.

[0015] A scanning method for a scanning device for detecting the annular weld of a GIS shell comprises the following steps: Step one: abutting, placing the welded GIS shell on the surface of the supporting tray, inserting the insertion rod into the insertion hole, and screwing the nut on the surface of the insertion rod to stabilize the insertion rod on the surface of the top disc, the insertion hole is provided with multiple groups to adjust the position of the insertion rod, one end of the suspension rope inserted into the insertion rod is wound around the winding disc, the winding disc is rotated by driving the wheel to adjust the length of the suspension rope, the other end of the suspension rope is connected to the winding belt, so that the winding belt is located outside the weld of the GIS shell, and the outside of the suspension rope is provided with a first spring, the first spring is supported on the surface of the winding belt to stabilize the position of the winding belt, the winding belt is wound around the outside of the weld of the GIS shell, the toughness of the surface of the winding belt keeps the winding belt in a circular arc shape, the insertion belt is inserted into the insertion hole, and the second magic tape on the surface of the insertion belt is attached to the surface of the first magic tape to tightly attach the winding belt to the surface of the GIS shell. Step two: detection, the insertion belt is inserted into the insertion hole, the second magic tape on the surface of the insertion belt is attached to the surface of the first magic tape to tightly attach the winding belt to the surface of the GIS shell, the supporting plate is supported on the surface of the GIS shell, the slider is inserted into the adjusting groove, the top and bottom of the L-shaped plate are supported on the top and bottom of the weld of the GIS shell, the weld is in a circular arc shape, the lifting plate can move in the lifting groove, the position of the L-shaped plate is adjusted, the detection head on the surface of the L-shaped plate moves with the L-shaped plate, so that the detection head is always aligned with the middle position of the weld, the detection head is convenient for detecting the weld, the surface of the slider is provided with a gear, the inside of the slider is provided with a driving device, the driving device drives the gear to rotate, the teeth on the surface of the gear are engaged with the teeth, and when the gear rotates, the slider can move in the sliding groove, so that the detection head moves around the weld on the surface of the GIS shell to realize comprehensive detection of the weld.

[0016] Compared with the prior art, the present application has the following advantages: The plug-in belt is plugged in the plug-in hole, the second magic tape on the surface of the plug-in belt is adhered to the surface of the first magic tape, so that the winding belt is tightly attached to the surface of the GIS shell, the top holding plate is held on the surface of the GIS shell, the sliding block is plugged in the adjusting groove, the top and bottom of the L-shaped plate are held on the top and bottom of the welding seam of the GIS shell, due to the arc shape of the welding seam, the lifting plate can move in the lifting groove, the position of the L-shaped plate is adjusted, the detection head on the surface of the L-shaped plate moves with the L-shaped plate, so that the detection head is always aligned with the middle position of the welding seam, the detection head is convenient for detecting the welding seam, and the surface of the sliding block is provided with a gear, the inside of the sliding block is provided with a driving device, the driving device drives the gear to rotate, the teeth on the surface of the gear are engaged, and when the gear rotates, the sliding block can move in the sliding groove, so that the detection head moves around the welding seam on the surface of the GIS shell, and comprehensive detection of the welding seam is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the application.

[0018] Figure 2 It is another perspective structural schematic diagram of the application.

[0019] Figure 3 It is a top view structural schematic diagram of the application.

[0020] Figure 4 It is a top plate structural schematic diagram of the application.

[0021] Figure 5 It is Figure 4 It is an enlarged schematic diagram of structure at A in the middle.

[0022] Figure 6 It is a winding belt structural schematic diagram of the application.

[0023] Figure 7 It is another perspective structural schematic diagram of the winding belt of the application.

[0024] Figure 8 It is a winding belt internal structure schematic diagram of the application.

[0025] Figure 9 It is a sliding block structural schematic diagram of the application.

[0026] Figure 10 It is another perspective structural schematic diagram of the sliding block of the application.

[0027] In the figure: top disc 1, first spring 2, support rod 3, fixed plate 4, connecting plate 5, supporting tray 6, winding belt 7, plug-in hole 8, plug-in rod 9, fixed rod 10, suspension rope 11, center block 12, winding disc 13, L-shaped rod 14, driven wheel 15, top holding plate 16, sliding groove 17, plug-in belt 18, flexible belt 19, first magic tape 20, plug-in hole 21, second magic tape 22, adjusting groove 23, tooth 24, limiting rod 25, sliding block 26, second spring 27, lifting groove 28, protection plate 29, detection head 30, U-shaped plate 31, gear 32, lifting plate 33, nut 34. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme of the present application clear, complete description, and the advantages are more clear and obvious, the following will be further described in detail by combining with the drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, only to explain the embodiments of the present application, and not for the purpose of limiting the embodiments of the present application, all other embodiments obtained by the ordinary skill in the art without doing creative work, belong to the scope of the present application.

[0029] Please refer to Figures 1 to 10 , the present application provides a kind of technical scheme: Embodiment 1: a scanning device for detecting GIS shell annular weld, comprising: top disc 1, the bottom of top disc 1 is fixed with support rod 3, the bottom of support rod 3 is fixed with fixed plate 4, the surface of fixed plate 4 is fixed with connecting plate 5, the other end of connecting plate 5 is fixed with supporting tray 6, the bottom of top disc 1 is provided with winding belt 7, the surface of winding belt 7 is fixed with top holding plate 16, the surface of winding belt 7 is provided with sliding groove 17, the inside of winding belt 7 is provided with sliding block 26, the surface of sliding block 26 is provided with gear 32, the surface of sliding block 26 is provided with lifting plate 33, the surface of lifting plate 33 is provided with U-shaped plate 31 and detection head 30, the inside of winding belt 7 is provided with tooth 24, the surface of top holding plate 16 is provided with adjusting groove 23, adjusting groove 23 is provided with two groups, respectively located in the surface of two groups of top holding plate 16, the two ends of sliding block 26 are plugged in adjusting groove 23, sliding block 26 can move in adjusting groove 23, the surface of sliding block 26 is provided with gear 32, gear 32 can rotate in sliding block 26, the inside of sliding block 26 is provided with rotating device, rotating device drives gear 32 to rotate, the tooth of gear 32 surface is engaged with tooth 24, gear 32 rotates can make sliding block 26 move in adjusting groove 23, the surface of winding belt 7 is provided with flexible belt 19, winding belt 7 is wound in the outside of GIS shell weld, the flexible belt 19 of the surface of winding belt 7 makes winding belt 7 keep circular arc, plug-in belt 18 is plugged in plug-in hole 21, the second magic tape 22 on the surface of plug-in belt 18 is stuck on the surface of first magic tape 20, so that winding belt 7 is closely attached to the surface of GIS shell.

[0030] In Example 2, on the basis of Example 1, the surface of the top disc 1 is provided with a plurality of groups of plug-in holes 8, plug-in rods 9 are plugged into the plug-in holes 8, nuts 34 are screwed onto the surface of the plug-in rods 9, suspension ropes 11 are plugged into the plug-in rods 9, the suspension ropes 11 can move telescopically inside the plug-in rods 9, the surface of the top disc 1 is fixed with a fixed rod 10, the other end of the fixed rod 10 is fixed with a center block 12, the surface of the center block 12 is fixed with L-shaped rods 14, and a winding disc 13 is arranged between the two groups of L-shaped rods 14, and the winding disc 13 can rotate between the L-shaped rods 14. One end of the suspension rope 11 is wound around the surface of the winding disc 13, the surface of the center block 12 is provided with a driving wheel 15, the surface of the driving wheel 15 is supported on the surface of the winding disc 13, the inside of the center block 12 is provided with a driving device, the driving device drives the driving wheel 15 to rotate, the winding disc 13 rotates with the driving wheel 15, the outside of the suspension rope 11 is provided with a first spring 2, one end of the first spring 2 is connected to the bottom of the top disc 1, the other end is connected to the surface of the winding belt 7, the other end of the suspension rope 11 is connected to the winding belt 7, so that the winding belt 7 is located outside the GIS shell weld, and the outside of the suspension rope 11 is provided with the first spring 2, the first spring 2 is supported on the surface of the winding belt 7, so that the position of the winding belt 7 is stable, the winding belt 7 is wound around the outside of the GIS shell weld, and the toughness belt 19 on the surface of the winding belt 7 keeps the winding belt 7 in a circular arc shape.

[0031] The winding belt 7 is fixed with two groups of top holding plates 16, the top holding plates 16 are located at the top and bottom of the winding belt 7, a sliding groove 17 is formed between the top holding plates 16, one end of the winding belt 7 is fixed with a plug-in belt 18, a flexible belt 19 is arranged on the surface of the winding belt 7, a plug-in hole 21 is formed on the surface of the winding belt 7, the plug-in belt 18 can be plugged into the plug-in hole 21, a first magic tape 20 is arranged on the surface of one end of the winding belt 7, a second magic tape 22 is arranged on the surface of the plug-in belt 18, the second magic tape 22 can be adhered to the surface of the first magic tape 20, and the plug-in belt 18 can move in the plug-in hole 21, a lifting groove 28 is formed on the surface of the sliding block 26, a plug-in block is arranged on the surface of the lifting plate 33, the plug-in block is plugged into the lifting groove 28, the plug-in block can move up and down in the lifting groove 28, the lifting plate 33 moves with the plug-in block, a limiting rod 25 is fixed in the lifting groove 28, the limiting rod 25 is plugged into the inside of the plug-in block, the plug-in block can move up and down on the surface of the limiting rod 25, a second spring 27 is arranged outside the limiting rod 25, one end of the second spring 27 is connected with the inner wall of the lifting groove 28, the other end is connected with the surface of the plug-in block, the limiting rod 25 is arranged in two groups, located at the top and bottom of the plug-in block, a type plate 31 is fixed at the top and bottom of the lifting plate 33, the type plate 31 moves with the sliding block 26, and the type plate 31 can move with the lifting plate 33, a protection plate 29 is fixed on the surface of the lifting plate 33, a detection head 30 on the surface of the lifting plate 33 is located inside the protection plate 29, the detection head 30 can move with the lifting plate 33, the lifting plate 33 can move in the lifting groove 28, the position of the type plate 31 is adjusted, the detection head 30 on the surface of the type plate 31 moves with the type plate 31, so that the detection head 30 is always aligned with the middle position of the weld, which facilitates the detection of the weld by the detection head 30, and the surface of the sliding block 26 is provided with a gear 32, a driving device is arranged in the inside of the sliding block 26, the driving device drives the gear 32 to rotate, the teeth on the surface of the gear 32 are engaged with the teeth 24.

[0032] The welded GIS shell is placed on the surface of the bearing tray 6, the insertion rod 9 is inserted into the insertion hole 8, and the insertion rod 9 is screwed on the surface of the insertion rod 9 using the nut 34, so as to stabilize the insertion rod 9 on the surface of the top tray 1, the insertion hole 8 is provided with multiple groups, which can adjust the position of the insertion rod 9, one end of the suspension rope 11 inserted in the insertion rod 9 is wound on the winding disc 13, the winding disc 13 is driven to rotate by driving the wheel 15, so as to adjust the length of the suspension rope 11, the other end of the suspension rope 11 is connected to the winding belt 7, so that the winding belt 7 is located outside the welding seam of the GIS shell, and the outside of the suspension rope 11 is provided with the first spring 2, the first spring 2 is held on the surface of the winding belt 7, so that the position of the winding belt 7 is stable, the winding belt 7 is wound outside the welding seam of the GIS shell, the toughness belt 19 on the surface of the winding belt 7 makes the winding belt 7 maintain a circular arc shape, the insertion belt 18 is inserted into the insertion hole 21, the second magic tape 22 on the surface of the insertion belt 18 is adhered to the surface of the first magic tape 20, so that the winding belt 7 is tightly attached to the surface of the GIS shell, the holding plate 16 is held on the surface of the GIS shell, the sliding block 26 is inserted into the adjusting groove 23, the top and bottom of the L-shaped plate 31 are held on the top and bottom of the welding seam of the GIS shell, due to the circular arc shape of the welding seam, the lifting plate 33 can move in the lifting groove 28, the position of the L-shaped plate 31 is adjusted, the detection head 30 on the surface of the L-shaped plate 31 moves with the L-shaped plate 31, so that the detection head 30 is always aligned with the middle position of the welding seam, which facilitates the detection of the welding seam by the detection head 30, and the surface of the sliding block 26 is provided with the gear 32, the inside of the sliding block 26 is provided with a driving device, the driving device drives the gear 32 to rotate, the teeth on the surface of the gear 32 are engaged with the teeth 24, when the gear 32 rotates, the sliding block 26 can move in the sliding groove 17, so that the detection head 30 moves around the welding seam on the surface of the GIS shell, and the comprehensive detection of the welding seam is realized.

[0033] Although the above describes the specific embodiments of the present application in order to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, all application creations utilizing the concept of the present application are within the protection scope of the present application as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims.

Claims

1. A scanning device for detecting circumferential welds on GIS shells, characterized in that: include: The top plate (1) has a support rod (3) fixed at the bottom, a fixing plate (4) fixed at the bottom of the support rod (3), a connecting plate (5) fixed on the surface of the fixing plate (4), a support tray (6) fixed at the other end of the connecting plate (5), a winding belt (7) set at the bottom of the top plate (1), a top holding plate (16) fixed on the surface of the winding belt (7), a groove (17) opened on the surface of the winding belt (7), a slider (26) set inside the winding belt (7), a gear (32) set on the surface of the slider (26), a lifting plate (33) set on the surface of the slider (26), and a U-shaped plate (31) and a detection head (30) set on the surface of the lifting plate (33).

2. The scanning device for detecting circumferential welds in GIS shells according to claim 1, characterized in that: The top plate (1) has a set of insertion holes (8) on its surface. Insertion holes (8) are provided in multiple sets. Insertion rods (9) are inserted into the insertion holes (8). Nuts (34) are screwed onto the surface of the insertion rods (9). A suspension rope (11) is inserted into the inside of the insertion rods (9). The suspension rope (11) can move in and out inside the insertion rods (9). A fixing rod (10) is fixed on the surface of the top plate (1). A center block (12) is fixed at the other end of the fixing rod (10). An L-shaped rod (14) is fixed on the surface of the center block (12). A winding disc (13) is provided between the two sets of L-shaped rods (14). The winding disc (13) can rotate between the L-shaped rods (14).

3. The scanning device for detecting circumferential welds in GIS shells according to claim 2, characterized in that: One end of the suspension rope (11) is wound around the surface of the winding disc (13). A drive wheel (15) is provided on the surface of the center block (12). The surface of the drive wheel (15) rests on the surface of the winding disc (13). A drive device is provided inside the center block (12). The drive device drives the drive wheel (15) to rotate. The winding disc (13) rotates with the drive wheel (15).

4. A scanning device for detecting circumferential welds in GIS shells according to claim 3, characterized in that: The winding tape (7) is fixed with two sets of top holding plates (16). The top holding plates (16) are located at the top and bottom of the winding tape (7). A sliding groove (17) is provided between the top holding plates (16). One end of the winding tape (7) is fixed with a plug-in tape (18). A flexible band (19) is provided on the surface of the winding tape (7). A plug-in hole (21) is provided on the surface of the winding tape (7). The plug-in tape (18) can be inserted into the plug-in hole (21). One end of the winding tape (7) is provided with a first hook and loop fastener (20). The surface of the plug-in tape (18) is provided with a second hook and loop fastener (22). The second hook and loop fastener (22) can be stuck to the surface of the first hook and loop fastener (20), and the plug-in tape (18) can move in the plug-in hole (21).

5. A scanning device for detecting circumferential welds in GIS shells according to claim 4, characterized in that: The winding tape (7) has teeth (24) inside. The surface of the top support plate (16) is provided with adjustment grooves (23). There are two sets of adjustment grooves (23), which are located on the surfaces of the two sets of top support plates (16). The two ends of the slider (26) are inserted into the adjustment grooves (23). The slider (26) can move in the adjustment grooves (23). The surface of the slider (26) is provided with gears (32). The gears (32) can rotate the slider (26). The inside of the slider (26) is provided with a rotating device. The rotating device drives the gears (32) to rotate. The teeth on the surface of the gears (32) mesh with the teeth (24). After the gears (32) rotate, the slider (26) can move in the adjustment grooves (23). The surface of the winding tape (7) is provided with a toughness band (19).

6. A scanning device for detecting circumferential welds in GIS shells according to claim 5, characterized in that: The surface of the slider (26) is provided with a lifting groove (28), and the surface of the lifting plate (33) is provided with a plug-in block. The plug-in block is inserted into the lifting groove (28) and can move up and down in the lifting groove (28). The lifting plate (33) moves with the plug-in block. A limit rod (25) is fixed in the lifting groove (28). The limit rod (25) is inserted into the inside of the plug-in block and can move up and down on the surface of the limit rod (25). A second spring (27) is provided on the outside of the limit rod (25). One end of the second spring (27) is connected to the inner wall of the lifting groove (28), and the other end is connected to the surface of the plug-in block. There are two sets of limit rods (25), located at the top and bottom of the plug-in block.

7. A scanning device for detecting circumferential welds in GIS shells according to claim 6, characterized in that: The top and bottom of the lifting plate (33) are fixed with a C-shaped plate (31), the C-shaped plate (31) moves with the slider (26), and the C-shaped plate (31) can move with the lifting plate (33).

8. A scanning device for detecting circumferential welds in GIS shells according to claim 7, characterized in that: The surface of the lifting plate (33) is fixed with a protective plate (29), and the detection head (30) on the surface of the lifting plate (33) is located inside the protective plate (29). The detection head (30) can move with the lifting plate (33).

9. A scanning device for detecting circumferential welds in GIS shells according to claim 8, characterized in that: The suspension rope (11) is provided with a first spring (2) on its outside. One end of the first spring (2) is connected to the bottom of the top plate (1), and the other end is connected to the surface of the winding belt (7).

10. A scanning method for using the scanning device for detecting circumferential welds in GIS shells as described in claim 9, characterized in that: Includes the following steps: Step 1: Connecting. Place the welded GIS shell on the surface of the support tray (6). Insert the plug rod (9) into the plug hole (8) and screw the nut (34) onto the surface of the plug rod (9). Stabilize the plug rod (9) on the surface of the top plate (1). The plug hole (8) is provided with multiple sets, which can adjust the position of the plug rod (9). One end of the suspension rope (11) inserted inside the plug rod (9) is wound around the winding disc (13). By rotating the drive wheel (15), the winding disc (13) is rotated, which can adjust the length of the suspension rope (11). The other end of the suspension rope (11) is connected to the winding tape (7). The winding tape (7) is located outside the weld of the GIS shell, and a first spring (2) is provided on the outside of the suspension rope (11). The first spring (2) holds the surface of the winding tape (7) to stabilize the position of the winding tape (7). The winding tape (7) is wrapped around the outside of the weld of the GIS shell. The toughness band (19) on the surface of the winding tape (7) keeps the winding tape (7) in an arc shape. The plug tape (18) is inserted into the plug hole (21). The second Velcro (22) on the surface of the plug tape (18) is attached to the surface of the first Velcro (20) so that the winding tape (7) is tightly attached to the surface of the GIS shell. Step 2: Inspection. The insertion tape (18) is inserted into the insertion hole (21). The second Velcro (22) on the surface of the insertion tape (18) is attached to the surface of the first Velcro (20), so that the wrapping tape (7) is tightly attached to the surface of the GIS shell. The top plate (16) is held against the surface of the GIS shell. The slider (26) is inserted into the adjustment groove (23). The top and bottom of the C-shaped plate (31) are held against the top and bottom of the weld of the GIS shell. Since the weld is arc-shaped, the lifting plate (33) can move in the lifting groove (28) to adjust the position of the C-shaped plate (31). Inspection of the surface of the C-shaped plate (31). The head (30) moves with the shaped plate (31) so that the detection head (30) is always aligned with the middle position of the weld, which facilitates the detection head (30) to detect the weld. The surface of the slider (26) is provided with gears (32), and the inside of the slider (26) is provided with a driving device. The driving device drives the gears (32) to rotate. The teeth on the surface of the gears (32) mesh with the teeth (24). When the gears (32) rotate, the slider (26) can move in the groove (17), so that the detection head (30) moves around the weld on the surface of the GIS shell, realizing comprehensive detection of the weld.

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