Tokamak bottom cold shield cooling pipe welding seam defect detection device

Abstract

The invention discloses a Tokamak bottom cold shield cooling pipe weld defect detection device, and relates to the technical field of pipe weld defect detection.The Tokamak bottom cold shield cooling pipe weld defect detection device comprises a supporting base and a first linear module fixedly connected to the top of the supporting base, and a first sliding base is installed at the top of the first linear module; a cooling pipe is placed on the top of the first sliding seat, a fixing seat is fixedly connected to the position, located on one side of the first sliding seat, of the top of the supporting seat, and a three-jaw chuck is installed on one side of the fixing seat; and the second linear module is installed on the inner side of the supporting base and located above the first linear module, and a second sliding base is installed on one side of the second linear module. Through mutual cooperation of the inclination adjusting mechanism and the transverse adjuster, the detection visual angle can be adjusted to the edge of a welding seam by obliquely moving the detection head, the detection coverage rate and accuracy of edge defects are improved, and then the overall practicability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe weld defect detection, in particular to a device for detecting weld defects in a tokamak bottom cold shield cooling pipe. Background Art

[0002] Tokamak is a device used for nuclear fusion research. It is one of the most mature and widely used magnetic confinement devices for the research of controlled nuclear fusion. The cold shield cooling pipe at the bottom of the Tokamak device is a key component of its thermal management system, which aims to achieve effective control of the heat load at the bottom of the Tokamak device. The cold shield cooling pipe at the bottom of the Tokamak device is formed by welding two pipes that are butt-jointed during the production and processing process. Therefore, after the pipes are welded, special detection equipment is needed to detect weld defects.

[0003] Existing weld defect detection devices generally align the detection head with the middle position of the weld through the device, and then emit X-rays through the detection head to detect defects in the weld. Since defects such as incomplete fusion, undercut or porosity are prone to occur at the edge of the weld, these defects are often ignored because their positions are difficult to detect, thereby affecting the accuracy of detection. For this reason, we provide a tokamak bottom cold shield cooling tube weld defect detection device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting weld defects in a cold shield cooling pipe at the bottom of a Tokamak in order to solve the problem that weld edge defects are difficult to detect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting weld defects of cooling pipes of cold shield at the bottom of a tokamak, comprising: a support seat and a first linear module fixedly connected to the top of the support seat, a first sliding seat is installed on the top of the first linear module, a cooling pipe is placed on the top of the first sliding seat, the top of the support seat is located on one side of the first sliding seat and is fixedly connected to a fixed seat, a three-jaw chuck is installed on one side of the fixed seat; a second linear module, the second linear module is installed on the inner side of the support seat and is located above the first linear module, and a cooling pipe is placed on the top of the first sliding seat. There is a second sliding seat, a hydraulic cylinder is installed on the top of the second sliding seat, the output end of the hydraulic cylinder passes through the inner side of the second sliding seat and is fixedly connected to a connecting plate, and a detection head is arranged on one side of the connecting plate; a lateral adjuster is located between the connecting plate and the detection head and is used to adjust the position of the detection head, the lateral adjuster includes a dial arranged above the detection head, and a toggle assembly for adjusting the lateral movement range of the detection head is arranged between the dial and the detection head; a tilt adjustment mechanism is located between the dial and the detection head and is used to adjust the angle of the detection head.

[0006] As a further solution of the present invention: the lateral adjuster also includes a fixing plate fixedly connected to the inner side of the connecting plate, a driving motor is installed on the top of the fixing plate, the output end of the driving motor is connected to a connecting shaft, one end of the connecting shaft passes through the inner side of the fixing plate and is rotatably connected to the fixing plate, one end of the connecting shaft is fixedly connected to the turntable, a sliding block is provided at the bottom of the turntable, a rotary push column is fixedly connected to the bottom of the sliding block, and a circular frame is sleeved on the outer wall of the rotary push column.

[0007] As a further solution of the present invention: a circular frame matching the rotary push column is opened on the inner side of the circular frame, a traction rod is fixedly connected to one side of the circular frame, an L-shaped seat is fixedly connected to one side of the fixed plate, and one end of the traction rod passes through the outside of the L-shaped seat and is slidably connected to the L-shaped seat.

[0008] As a further solution of the present invention: the toggle assembly includes a one-way threaded screw rotatably connected to the inner side of the turntable, and one end of the one-way threaded screw passes through the outside of the turntable and is fixedly connected to a knob, the slider is installed on the outer wall of the one-way threaded screw, and the inner side of the turntable is provided with a limiting groove matching the slider.

[0009] As a further solution of the present invention: the tilt adjustment mechanism includes an L-shaped seat fixedly connected to the bottom of the circular frame, a movable seat slidably connected to the inner side of the L-shaped seat, a spherical rod fixedly connected to the top of the movable seat, a connecting spring installed between the spherical rod and the L-shaped seat, a first inclined plate attached to the top of the spherical rod, a T-shaped block is arranged on the top of the first inclined plate, and an auxiliary positioning component for adjusting the position is arranged between the first inclined plate and the T-shaped block.

[0010] As a further solution of the present invention: the tilt adjustment mechanism also includes a connecting block fixedly connected to the top of the detection head, one side of the connecting block is fixedly connected to a rotating shaft, one end of the rotating shaft passes through the outside of the moving seat and is rotatably connected to the moving seat, one end of the rotating shaft is fixedly connected to a circular ring, the outer wall of the circular ring is fixedly connected to a second spur gear, and the bottom of the L-shaped seat is fixedly connected to a first spur rack meshing with the second spur gear.

[0011] As a further solution of the present invention: the auxiliary positioning assembly includes a second connecting rod fixedly connected to the inner side of the connecting plate, one end of the second connecting rod is fixedly connected to a sealing shell, one side of the sealing shell is fixedly connected to a suspension seat, the inner side of the suspension seat is rotatably connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to a third spur gear, the top of the first inclined plate is fixedly connected to a second spur rack meshing with the third spur gear, and the top of the T-shaped block is fixedly connected to a second spur rack meshing with the third spur gear.

[0012] As a further solution of the present invention: the auxiliary positioning assembly also includes a second piston groove opened inside the sealing shell, a second piston block is slidably connected inside the second piston groove, a first power rod is fixedly connected to one side of the second piston block, one end of the first power rod passes through the outside of the sealing shell and is fixedly connected to the second spur rack, an auxiliary spring is installed between the second piston block and the second piston groove, a T-shaped block is slidably connected to the top of the sealing shell, one end of the T-shaped block is fixedly connected to the second power rod, and the second power rod is fixedly connected to the second spur rack, a first piston groove is opened on the inner side of the rotating disk, and the inner side of the first piston groove is slidably connected to There is a first piston block, one side of the first piston block is fixedly connected to a piston rod, and one end of the piston rod passes through the outside of the first piston groove and is fixedly connected to the slider, the top of the rotary disk is rotatably connected to a sealing air guide ring, the inner side of the sealing air guide ring is fixedly connected to a first connecting rod, and the first connecting rod is fixedly connected to the fixed plate, an air guide groove is provided inside the sealing air guide ring, and an air guide hole communicating with the first piston groove and the air guide groove is provided on the inner side of the rotary disk, a connecting pipe is fixedly connected to the air inlet on the top of the sealing shell, and one end of the connecting pipe extends to the inside of the second piston groove, and the other end of the connecting pipe is connected to the air outlet of the sealing air guide ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting the mutual cooperation of the tilt adjustment mechanism and the lateral adjuster, when the detection of the middle position of the weld of the detection head is completed, the drive motor can be started, and the output end of the drive motor can be started and stopped intermittently. The output end of the drive motor drives the connecting shaft to drive the rotary disk to rotate in a circle, so that the circular frame is moved to one side of the weld by the rotary push column, so that the spherical rod moves from the center position of the first inclined plate to the side slope direction. When the spherical rod contacts the side slope of the first inclined plate, the spherical rod is pushed under the action of the slope to drive the detection head to move downward. Since the first spur gear is fixed, the second spur gear is driven to drive the detection head to tilt toward the edge of the weld through the rotating shaft, so that the detection head can be aligned with the edge of the weld. Since the edge of the weld may have defects such as incomplete fusion, undercut or pores, these defects are often ignored because of the difficult position to detect. By tilting and moving the detection head, the detection viewing angle can be adjusted to the edge of the weld, thereby improving the detection coverage and accuracy of edge defects, thereby improving the overall practicality of the device;

[0015] 2. By setting up the toggle assembly, when it is necessary to detect welds of different widths, the one-way threaded screw can be rotated to drive the slider to adjust the lateral position of the circular frame, so that the driving radius of the rotary disk can be adaptively adjusted according to the width of the weld during the circular rotation, thereby improving the overall practicality of the device;

[0016] 3. By setting an auxiliary positioning component, the first piston groove is set to be U-shaped, and one end of the first piston groove is connected to the outside through a breathable tube. When the slider moves laterally to adjust the position, the first piston block is pulled to move by the piston rod, so that the gas inside the first piston groove is pushed into the gas guide groove through the gas guide hole, and then introduced into the second piston groove through the connecting pipe to form a thrust to push the second piston block to move laterally, so that the second spur rack is driven to move toward the edge of the weld through the first power rod. When the second spur rack moves toward the edge of the weld, it is driven to move in the opposite direction through the third spur gear, so that the first inclined plate and the T-shaped block can always correspond to the edge of the weld, so that the edge device can directly detect different welds and make the detection head tilt, thereby improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the bottom structure of the rotating disk of the present invention;

[0019] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 is a cross-sectional view of a rotating disk of the present invention;

[0021] Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle;

[0022] Figure 6 It is a schematic diagram of the bottom structure of the L-shaped seat of the present invention;

[0023] Figure 7 is a cross-sectional view of the sealing shell of the present invention;

[0024] Figure 8 It is a side view of the sealing shell of the present invention.

[0025] In the figure: 1, support seat; 2, first linear module; 3, first sliding seat; 4, fixed seat; 5, cooling pipe; 6, three-jaw chuck; 7, second linear module; 8, second sliding seat; 9, hydraulic cylinder; 10, connecting plate; 11, fixed plate; 12, driving motor; 13, connecting shaft; 14, connecting pipe; 15, rotary disk; 16, sealing air guide ring; 17, L-shaped seat; 18, first connecting rod; 19, detection head; 20, second connecting rod; 21, circular frame; 22, rotary push column; 23, slider; 24, L-shaped seat; 25, first inclined plate; 26, sealing shell; 27, first straight tooth 28. Connecting spring; 29. ​​Second spur rack; 30. Third spur gear; 31. Second spur rack; 32. First power rod; 33. Second power rod; 34. T-block; 35. Air guide groove; 36. Air guide hole; 37. First piston groove; 38. First piston block; 39. Piston rod; 40. One-way threaded screw; 41. Connecting block; 42. Rotating shaft; 43. Ring; 44. Second spur gear; 45. Moving seat; 46. Second piston block; 47. Auxiliary spring; 48. Second piston groove; 49. Rotating shaft; 50. Suspension seat; 51. Traction rod; 52. Spherical rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0028] Example 1

[0029] See also Figures 1 to 8The present embodiment provides a weld defect detection device for the cooling pipe of the cold shield at the bottom of a tokamak, comprising: a support seat 1 and a first linear module 2 fixedly connected to the top of the support seat 1, a first sliding seat 3 is installed on the top of the first linear module 2, a cooling pipe 5 is placed on the top of the first sliding seat 3, a fixed seat 4 is fixedly connected to the top of the support seat 1 on one side of the first sliding seat 3, and a three-jaw chuck 6 is installed on one side of the fixed seat 4; a second linear module 7, the second linear module 7 is installed on the inner side of the support seat 1 and is located above the first linear module 2, a second sliding seat 8 is installed on one side of the second linear module 7, a hydraulic cylinder 9 is installed on the top of the second sliding seat 8, and the output end of the hydraulic cylinder 9 passes through the second sliding seat 8. A connecting plate 10 is fixedly connected to the inner side of the movable seat 8, and a detection head 19 is arranged on one side of the connecting plate 10; a lateral adjuster is located between the connecting plate 10 and the detection head 19, and is used to adjust the position of the detection head 19. The lateral adjuster includes a turntable 15 arranged above the detection head 19, and the lateral adjuster also includes a fixed plate 11 fixedly connected to the inner side of the connecting plate 10, and a driving motor 12 is installed on the top of the fixed plate 11. The output end of the driving motor 12 is connected to a connecting shaft 13, one end of the connecting shaft 13 passes through the inner side of the fixed plate 11 and is rotatably connected to the fixed plate 11, and one end of the connecting shaft 13 is fixedly connected to the turntable 15, and a slider 23 is arranged at the bottom of the turntable 15, and the bottom of the slider 23 is fixed A rotary push column 22 is fixedly connected, and a circular frame 21 is sleeved on the outer wall of the rotary push column 22. A circular frame matching the rotary push column 22 is opened on the inner side of the circular frame 21. A traction rod 51 is fixedly connected to one side of the circular frame 21. An L-shaped seat 17 is fixedly connected to one side of the fixed plate 11, and one end of the traction rod 51 passes through the outside of the L-shaped seat 17 and is slidably connected to the L-shaped seat 17. The tilt adjustment mechanism is located between the rotary disk 15 and the detection head 19 and is used to adjust the angle of the detection head 19. The tilt adjustment mechanism includes an L-shaped seat 24 fixedly connected to the bottom of the circular frame 21, a moving seat 45 is slidably connected to the inner side of the L-shaped seat 24, and a spherical rod 52 is fixedly connected to the top of the moving seat 45. The spherical rod 52 and A connecting spring 28 is installed between the L-shaped seats 24, a first inclined plate 25 is attached to the top of the spherical rod 52, a T-shaped block 34 is arranged on the top of the first inclined plate 25, an auxiliary adjustment component for adjusting the position is arranged between the first inclined plate 25 and the T-shaped block 34, and the tilt adjustment mechanism also includes a connecting block 41 fixedly connected to the top of the detection head 19, a rotating shaft 42 is fixedly connected to one side of the connecting block 41, one end of the rotating shaft 42 passes through the outside of the moving seat 45 and is rotatably connected to the moving seat 45, one end of the rotating shaft 42 is fixedly connected to a circular ring 43, the outer wall of the circular ring 43 is fixedly connected to a second spur gear 44, and the bottom of the L-shaped seat 24 is fixedly connected to a first spur rack 27 meshing with the second spur gear 44;

[0030] The working principle of the three-jaw chuck 6 is to drive the plane rectangular thread by rotating the bevel gear to make the three jaws move centripetally. Since the pitch of the plane rectangular thread is equal, the movement distance of the three jaws is equal, so it has the function of automatic centering. This design makes the three-jaw chuck have higher positioning accuracy and stability in industrial applications. Since the three-jaw chuck 6 is a prior art, it will not be described in detail in this solution. There are several names for linear modules, such as linear modules, rectangular coordinate robots, linear slides, etc. It is an automated upgrade unit following linear guides, linear motion modules, and ball screw linear transmission mechanisms. The linear and curved motion of the load can be realized through the combination of various units, making the automation of light loads more flexible and the positioning more accurate. Since the first linear module 2 and the second linear module 7 are existing technologies, they are not described in detail in this solution. First, the cooling tube 5 to be detected is placed on the top of the first sliding seat 3, and then fixed by the three-jaw chuck 6. A servo motor for driving the three-jaw chuck 6 to rotate in a circle is installed on one side of the fixed seat 4. The three-jaw chuck 6 is driven by the servo motor to drive the clamped cooling tube 5 to rotate in a circle. The detection head 19 is adjusted to the position of the welding seam of the cooling tube 5 through the second linear module 7, and then the detection head 19 is started. The detection head 19 emits X-rays to detect the welding seam position of the cooling tube 5.

[0031] When the detection of the middle position of the weld at the position of the detection head 19 is completed, the drive motor 12 can be started, and the output end of the drive motor 12 can be started and stopped intermittently. The output end of the drive motor 12 drives the connecting shaft 13 to drive the rotary disk 15 to rotate in a circle, so that the circular frame 21 is moved toward one side of the weld by the rotary push column 22, so that the spherical rod 52 moves from the center position of the first inclined plate 25 to the side slope direction. When the spherical rod 52 contacts the side slope of the first inclined plate 25, the spherical rod 52 is pushed under the action of the slope to drive the detection head 19 to move downward. Since the first spur rack 27 is fixed, the second spur gear 44 is driven to drive the detection head 19 to tilt toward the edge of the weld through the rotating shaft 42, so that the detection head 19 can be aligned with the edge of the weld. Since the edge of the weld may have defects such as incomplete fusion, undercut or pores, these defects are often ignored because they are difficult to detect. By tilting and moving the detection head 19, the detection viewing angle can be adjusted to the edge of the weld, thereby improving the detection coverage and accuracy of edge defects, thereby improving the overall practicality of the device.

[0032] When the circular frame 21 moves horizontally to the maximum position, the drive motor 12 stops moving. When the detection of one edge of the weld is completed, the drive motor 12 starts again until the circular frame 21 is driven to move horizontally to the maximum position on the other side to facilitate the detection of the other edge of the weld.

[0033] Example 2

[0034] A toggle assembly for adjusting the lateral movement range of the detection head 19 is provided between the rotary disk 15 and the detection head 19. The toggle assembly includes a one-way threaded screw 40 rotatably connected to the inner side of the rotary disk 15, and one end of the one-way threaded screw 40 penetrates the outer side of the rotary disk 15 and is fixedly connected to a knob. The slider 23 is installed on the outer wall of the one-way threaded screw 40, and a limit slide groove matching the slider 23 is provided on the inner side of the rotary disk 15.

[0035] When welds of different widths need to be inspected, the one-way threaded screw 40 can be rotated to drive the slider 23 to adjust the lateral position of the circular frame 21, so that the driving radius of the turntable 15 can be adaptively adjusted according to the weld width during the circular rotation, thereby improving the overall practicality of the device.

[0036] Example 3

[0037] The auxiliary positioning assembly includes a second connecting rod 20 fixedly connected to the inner side of the connecting plate 10, one end of the second connecting rod 20 is fixedly connected to the sealing shell 26, one side of the sealing shell 26 is fixedly connected to the suspension seat 50, the inner side of the suspension seat 50 is rotatably connected to the rotating shaft 49, the outer wall of the rotating shaft 49 is fixedly connected to the third spur gear 30, the top of the first inclined plate 25 is fixedly connected to the second spur rack 31 meshing with the third spur gear 30, the top of the T-shaped block 34 is fixedly connected to the second spur rack 29 meshing with the third spur gear 30, the auxiliary positioning assembly also includes a second piston groove 48 opened in the sealing shell 26, the interior of the second piston groove 48 is slidably connected to the second piston block 46, one side of the second piston block 46 is fixedly connected to the first power rod 32, one end of the first power rod 32 passes through the outside of the sealing shell 26 and is fixedly connected to the second spur rack 29, an auxiliary spring 47 is installed between the second piston block 46 and the second piston groove 48, the top of the sealing shell 26 is slidably connected to the T-shaped The first piston block 38 is slidably connected to the inner side of the first piston groove 37, and a piston rod 39 is fixedly connected to one side of the first piston block 38, and one end of the piston rod 39 passes through the outside of the first piston groove 37 and is fixedly connected to the slider 23. The top of the rotary disk 15 is rotatably connected to the sealing air guide ring 16, and the sealing air guide ring 16 is rotatably connected to the top of the rotary disk 15. The inner side of the sealing air guide ring 16 is fixedly connected with the first connecting rod 18, and the first connecting rod 18 is fixedly connected with the fixed plate 11. The inner side of the sealing air guide ring 16 is provided with an air guide groove 35, and the inner side of the rotating disk 15 is provided with an air guide hole 36 communicating with the first piston groove 37 and the air guide groove 35. The air inlet at the top of the sealing shell 26 is fixedly connected with a connecting pipe 14, and one end of the connecting pipe 14 extends to the inside of the second piston groove 48, and the other end of the connecting pipe 14 is connected to the air outlet of the sealing air guide ring 16;

[0038] The first piston groove 37 is set to be U-shaped, and one end of the first piston groove 37 is connected to the outside through an air vent. When the slider 23 moves laterally to adjust the position, the first piston block 38 is pulled to move by the piston rod 39, so that the internal gas of the first piston groove 37 is pushed into the gas guide groove 35 through the air guide hole 36, and then introduced into the second piston groove 48 through the connecting pipe 14 to form a thrust to push the second piston block 46 to move laterally, thereby driving the second spur rack 29 to move toward the edge of the weld through the first power rod 32. When the second spur rack 29 moves toward the edge of the weld, the second spur rack 31 is driven to move in the opposite direction through the third spur gear 30, so that the first inclined plate 25 and the T-shaped block 34 can always correspond to the edge of the weld. In this way, the edge device can directly detect different welds and make the detection head 19 tilt, thereby improving the overall practicality of the device.

[0039] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tokamak bottom cold shield cooling pipe weld defect detection device, characterized in that: include: A support seat (1) and a first linear module (2) fixedly connected to the top of the support seat (1), a first sliding seat (3) being installed on the top of the first linear module (2), a cooling pipe (5) being placed on the top of the first sliding seat (3), a fixed seat (4) being fixedly connected to the top of the support seat (1) and located on one side of the first sliding seat (3), and a three-jaw chuck (6) being installed on one side of the fixed seat (4); A second linear module (7), the second linear module (7) is installed on the inner side of the support seat (1) and is located above the first linear module (2), a second sliding seat (8) is installed on one side of the second linear module (7), a hydraulic cylinder (9) is installed on the top of the second sliding seat (8), an output end of the hydraulic cylinder (9) passes through the inner side of the second sliding seat (8) and is fixedly connected to a connecting plate (10), and a detection head (19) is provided on one side of the connecting plate (10); a transverse regulator, located between the connecting plate (10) and the detection head (19), and used for adjusting the position of the detection head (19); the transverse regulator comprises a rotary disk (15) arranged above the detection head (19); and a toggle assembly for adjusting the transverse movement range of the detection head (19) is arranged between the rotary disk (15) and the detection head (19); The tilt adjustment mechanism is located between the rotating disk (15) and the detection head (19) and is used to adjust the angle of the detection head (19).

2. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 1, characterized in that: The lateral regulator also includes a fixing plate (11) fixedly connected to the inner side of the connecting plate (10), a driving motor (12) being installed on the top of the fixing plate (11), an output end of the driving motor (12) being connected to a connecting shaft (13), one end of the connecting shaft (13) passing through the inner side of the fixing plate (11) and being rotatably connected to the fixing plate (11), one end of the connecting shaft (13) being fixedly connected to the rotating disk (15), a sliding block (23) being provided at the bottom of the rotating disk (15), a rotary push column (22) being fixedly connected to the bottom of the sliding block (23), and a circular frame (21) being sleeved on the outer wall of the rotary push column (22).

3. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 2, characterized in that: A circular frame matching the rotary push column (22) is provided on the inner side of the circular frame (21), a traction rod (51) is fixedly connected to one side of the circular frame (21), an L-shaped seat (17) is fixedly connected to one side of the fixed plate (11), and one end of the traction rod (51) passes through the outside of the L-shaped seat (17) and is slidably connected to the L-shaped seat (17).

4. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 3, characterized in that: The toggle assembly comprises a one-way threaded screw (40) rotatably connected to the inner side of the rotary disk (15), one end of the one-way threaded screw (40) passes through the outside of the rotary disk (15) and is fixedly connected to a knob, the slider (23) is mounted on the outer wall of the one-way threaded screw (40), and a limiting sliding groove matching the slider (23) is provided on the inner side of the rotary disk (15).

5. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 4, characterized in that: The tilt adjustment mechanism comprises a circular frame (21) having an L-shaped seat (24) fixedly connected to the bottom thereof, a movable seat (45) slidably connected to the inner side of the L-shaped seat (24), a spherical rod (52) fixedly connected to the top of the movable seat (45), a connecting spring (28) installed between the spherical rod (52) and the L-shaped seat (24), a first inclined plate (25) abutting against the top of the spherical rod (52), a T-shaped block (34) arranged at the top of the first inclined plate (25), and an auxiliary position adjustment component for adjusting the position arranged between the first inclined plate (25) and the T-shaped block (34).

6. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 5, characterized in that: The tilt adjustment mechanism also includes a connection block (41) fixedly connected to the top of the detection head (19); a rotating shaft (42) is fixedly connected to one side of the connection block (41); one end of the rotating shaft (42) passes through the outside of the movable seat (45) and is rotatably connected to the movable seat (45); one end of the rotating shaft (42) is fixedly connected to a circular ring (43); the outer wall of the circular ring (43) is fixedly connected to a second spur gear (44); and the bottom of the L-shaped seat (24) is fixedly connected to a first spur rack (27) meshing with the second spur gear (44).

7. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 6, characterized in that: The auxiliary positioning assembly comprises a second connecting rod (20) fixedly connected to the inner side of the connecting plate (10), one end of the second connecting rod (20) is fixedly connected to a sealing shell (26), one side of the sealing shell (26) is fixedly connected to a suspension seat (50), the inner side of the suspension seat (50) is rotatably connected to a rotating shaft (49), the outer wall of the rotating shaft (49) is fixedly connected to a third spur gear (30), the top of the first inclined plate (25) is fixedly connected to a second spur rack (31) meshing with the third spur gear (30), and the top of the T-shaped block (34) is fixedly connected to a second spur rack (29) meshing with the third spur gear (30).

8. A Tokamak bottom cold shield cooling pipe weld defect detection device according to claim 7, characterized in that: The auxiliary positioning assembly also includes a second piston groove (48) provided inside the sealing shell (26), a second piston block (46) being slidably connected inside the second piston groove (48), a first power rod (32) being fixedly connected to one side of the second piston block (46), one end of the first power rod (32) passing through the outside of the sealing shell (26) and being fixedly connected to the second spur rack (29), an auxiliary spring (47) being installed between the second piston block (46) and the second piston groove (48), a T-shaped block (34) being slidably connected to the top of the sealing shell (26), one end of the T-shaped block (34) being fixedly connected to the second power rod (33), and the second power rod (33) being fixedly connected to the second spur rack (31), a first piston groove (37) being provided on the inner side of the rotating disk (15), the first piston groove (37) being slidably connected to the inner side of the first piston block (38), the A piston rod (39) is fixedly connected to one side of the first piston block (38), and one end of the piston rod (39) passes through the outside of the first piston groove (37) and is fixedly connected to the slider (23). A sealing air guide ring (16) is rotatably connected to the top of the rotary disk (15). A first connecting rod (18) is fixedly connected to the inner side of the sealing air guide ring (16), and the first connecting rod (18) is fixedly connected to the fixed plate (11). An air guide groove (35) is provided inside the sealing air guide ring (16). An air guide hole (36) communicating with the first piston groove (37) and the air guide groove (35) is provided on the inner side of the rotary disk (15). A connecting pipe (14) is fixedly connected to the air inlet at the top of the sealing shell (26), and one end of the connecting pipe (14) extends to the inside of the second piston groove (48), and the other end of the connecting pipe (14) is connected to the air outlet of the sealing air guide ring (16).

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