Seam foraging tool for overhauling liquid nitrogen cold therapy device

Abstract

The invention discloses a liquid nitrogen cold therapy device maintenance crack finding tool comprising an ultrasonic probe used for carrying out crack detection on a liquid nitrogen storage tank and a connecting frame used for supporting the ultrasonic probe, the connecting frame is provided with a rotating structure used for driving the ultrasonic probe to carry out crack detection on the liquid nitrogen storage tank in a spiral track, and the rotating structure is used for driving the ultrasonic probe to carry out crack detection on the liquid nitrogen storage tank. The rotating structure comprises a base frame arranged on the frame connecting frame, a vertical sliding groove allowing the base frame to freely slide in the vertical direction is formed in the frame connecting frame, two sets of transverse moving bases synchronously moving in the same direction or opposite directions are arranged on the base frame, and the ultrasonic probe is arranged on the transverse moving bases. The ultrasonic probe is driven to move on the outer wall of the liquid nitrogen storage tank along a spiral track, so that all-directional crack detection of the liquid nitrogen storage tank can be realized, detection dead angles are eliminated, particularly, hidden parts and tiny cracks of the liquid nitrogen storage tank are detected more thoroughly, and comprehensiveness and accuracy of crack detection are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of maintenance devices, in particular to a gap-finding tool for maintenance of liquid nitrogen cryotherapy devices. Background Art

[0002] Liquid nitrogen cryotherapy device is a device used in the medical and cosmetic fields. It uses the extremely low temperature of liquid nitrogen for cryotherapy. Its main function is to quickly cool local tissue through low temperature, thereby destroying diseased tissue or promoting skin regeneration. It is widely used to remove skin growths, treat frozen warts, skin cancer and other diseases. In the daily use of liquid nitrogen cryotherapy device, due to the large temperature difference in its working environment, after long-term operation, various parts of the device may be affected by thermal expansion and contraction, resulting in enlarged gaps or reduced sealing performance, thereby affecting the safety and stability of the equipment.

[0003] Among them, liquid nitrogen storage tanks are usually made of metal or alloy materials. When working under extremely low temperature conditions for a long time, the metal will gradually suffer from material fatigue. The low temperature environment of liquid nitrogen will make the metal material brittle, increasing the risk of cracks in the tank body when subjected to physical stress. Long-term use may cause material aging and form tiny cracks.

[0004] Liquid nitrogen storage tanks are typically installed inside the cabin of a liquid nitrogen cryotherapy device, or sometimes independently installed outside the cabin. The tanks are connected to the liquid nitrogen nozzles inside the cabin via cooling pipes to ensure smooth liquid nitrogen transmission. However, when inspecting and servicing liquid nitrogen storage tanks, they are connected to rigid pipes and are mostly located inside a narrow cabin, resulting in extremely limited inspection space. This makes comprehensive and accurate seam-finding inspections difficult. Due to the narrow space and pipe layout, conventional tools are unable to effectively cover the entire surface of the tank, making inspections of subtle gaps and hidden locations particularly difficult. This increases the complexity and risk of equipment inspections. Therefore, a seam-finding tool for inspecting liquid nitrogen cryotherapy devices is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a crack-finding tool for repairing liquid nitrogen cryotherapy devices, which has the advantage of being able to realize all-round crack detection of liquid nitrogen storage tanks, solving the problem that it is difficult to effectively cover the entire surface of the storage tank during the detection process.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a crack-finding tool for repairing a liquid nitrogen cryotherapy device, comprising an ultrasonic probe for detecting cracks in a liquid nitrogen storage tank, and a cam frame for supporting the ultrasonic probe, wherein the cam frame is provided with a rotating structure for driving the ultrasonic probe in a spiral trajectory to detect cracks in the liquid nitrogen storage tank;

[0007] The rotating structure includes a base frame arranged on a hinge frame, and a vertical slide groove is provided on the hinge frame for the base frame to slide freely in the vertical direction. The base frame is provided with two sets of transverse seats that move synchronously toward or away from each other. The ultrasonic probe is arranged on the transverse seat, and the transverse seat is provided with a circular motion component that drives the ultrasonic probe to adhere to the surface of the liquid nitrogen storage tank and rotate horizontally.

[0008] A guide column is slidably passed through the transverse seat, and both ends of the guide column are fixedly connected to the base frame. A lifting component for adjusting the horizontal height of the base frame is provided on the hinge frame.

[0009] Preferably, the base frame is provided with a transverse threaded rod driven by a motor and freely rotating in the vertical direction. The transverse threaded rod rotates on a fixed axis on the base frame. The transverse threaded rod is threadedly connected with two groups of directional threaded cylinders that move synchronously toward or away from each other. The directional threaded cylinders rotate on a fixed axis on a transverse seat, and a positioning component for limiting the rotation of the directional threaded cylinders is provided on the transverse seat.

[0010] Preferably, the positioning assembly includes a receiving groove provided on the transverse displacement seat, a positioning block is slidably connected in the receiving groove, a positioning groove for plugging into the directional threaded cylinder corresponding to the position of the positioning block is provided, and a reset spring is also provided in the receiving groove, and the two ends of the reset spring are respectively fixedly connected to the positioning block and the transverse displacement seat.

[0011] Preferably, the annular moving assembly includes a blocking rod arranged on the transverse seat, and the transverse seat is provided with a rectangular groove for the blocking rod to slide through, the blocking rod is detachably connected to a semicircular support seat, and the semicircular support seat is provided with a freely rotatable semicircular outer gear ring;

[0012] The semicircular support seat is provided with an arc groove for sliding connection of the semicircular outer gear ring, the semicircular outer gear ring is meshedly connected with the side gear, the side gear and the directional threaded cylinder are transmission-connected, and the side gear rotates on the semicircular support seat on a fixed axis;

[0013] A yield pin is fixedly connected to one side of the positioning block facing the blocking rod, and a V-shaped groove for the yield pin to be slidably connected is provided on the blocking rod.

[0014] Preferably, a circular structure is formed between the two groups of semicircular support seats, which accommodates the liquid nitrogen storage tank and is coaxial with the liquid nitrogen storage tank.

[0015] Preferably, a spline cylinder is fixedly connected to the inner circumference of the semicircular outer gear ring, a spline shaft is provided on the spline cylinder, and a spline groove for horizontal sliding connection of the spline shaft is opened on the spline cylinder, a yield spring is provided in the spline groove, and the two ends of the yield spring are respectively fixedly connected to the spline shaft and the spline cylinder;

[0016] The ultrasonic probe is fixedly connected to one end of the spline shaft away from the spline cylinder.

[0017] Preferably, the lifting assembly includes an L-shaped frame fixedly connected to the transverse seat, the L-shaped frame is provided with a vertical threaded rod that can rotate freely in the horizontal direction, and the vertical threaded rod rotates on the L-shaped frame with a fixed axis;

[0018] The vertical threaded rod is threadedly connected to an internal threaded barrel, and a transverse sliding groove for horizontal sliding connection of the internal threaded barrel is provided on the bracket frame.

[0019] Preferably, a hollow cylinder is sleeved on the transverse threaded rod, and the hollow cylinder is coaxially fixed on the directional threaded cylinder. A driving bevel gear is fixedly sleeved on the hollow cylinder, and the driving bevel gear is meshedly connected with a driven bevel gear. The driven bevel gear is coaxially fixed to the vertical threaded rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention drives the ultrasonic probe to move along a spiral trajectory on the outer wall of the liquid nitrogen storage tank through the coordinated work of the circular motion component and the lifting component, thereby realizing all-round crack detection of the liquid nitrogen storage tank. Compared with traditional detection tools, the structural design of the present invention eliminates blind spots in detection, especially for the detection of hidden parts and subtle gaps in the liquid nitrogen storage tank, ensuring comprehensiveness and accuracy of crack detection.

[0022] 2. The present invention is equipped with a rotating structure and a height-adjustable lifting assembly to adapt to liquid nitrogen storage tanks of different diameters and sizes. The ultrasonic probe can always maintain a close fit with the surface of the liquid nitrogen storage tank. Regardless of how the size of the liquid nitrogen storage tank changes, high-precision crack detection can be achieved, thereby improving the applicability of the equipment and the flexibility of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the components where the semicircular support seat of the present invention is located;

[0025] Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle;

[0026] Figure 4 This is a schematic diagram of the components of the L-shaped frame of the present invention;

[0027] Figure 5 This is a schematic diagram of the components where the spline cylinder of the present invention is located;

[0028] Figure 6 This is a schematic diagram of the components where the transverse shift seat of the present invention is located;

[0029] Figure 7 This is a schematic diagram of the components where the blocking rod of the present invention is located;

[0030] Figure 8 For the present invention Figure 6 Enlarged view of point A in the middle.

[0031] In the figure: 1. Liquid nitrogen storage tank; 2. Engagement frame; 3. Ultrasonic probe; 4. Base frame; 5. Transverse displacement seat; 6. Guide column; 7. Transverse threaded rod; 8. Directional threaded cylinder; 9. Positioning groove; 10. Positioning block; 11. Return spring; 12. Give way pin; 13. Block rod; 14. V-shaped groove; 15. Semicircular support seat; 16. Semicircular outer gear ring; 17. Spline cylinder; 18. Spline shaft; 19. Give way spring; 20. Side gear; 21. Driving bevel gear; 22. Driven bevel gear; 23. L-shaped frame; 24. Vertical threaded rod; 25. Inwardly threaded cylinder; 26. Transverse slide groove; 27. Hollow cylinder. DETAILED DESCRIPTION

[0032] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] See also Figures 1 to 8 The present invention provides a technical solution: a crack detection tool for repairing a liquid nitrogen cryotherapy device, comprising an ultrasonic probe 3 for detecting cracks in a liquid nitrogen storage tank 1, and a bracket 2 for supporting the ultrasonic probe 3. The bracket 2 is provided with a rotating structure for driving the ultrasonic probe 3 to detect cracks in the liquid nitrogen storage tank 1 in a spiral trajectory;

[0034] The rotating structure includes a base frame 4 arranged on the anchor frame 2, and the anchor frame 2 is provided with a vertical slide groove for the base frame 4 to slide freely in the vertical direction. The base frame 4 is provided with two sets of transverse seats 5 that move synchronously toward or away from each other. The ultrasonic probe 3 is arranged on the transverse seats 5, and the transverse seats 5 are provided with a circular motion component that drives the ultrasonic probe 3 to adhere to the surface of the liquid nitrogen storage tank 1 and rotate horizontally;

[0035] A guide column 6 is slidably passed through the transverse seat 5 , and both ends of the guide column 6 are fixedly connected to the base frame 4 . A lifting component for adjusting the horizontal height of the base frame 4 is provided on the hinge frame 2 .

[0036] like Figure 1 and Figure 2As shown, when the liquid nitrogen storage tank 1 in the liquid nitrogen cryotherapy device is inspected and repaired, the bracket frame 2 is placed on one side of the liquid nitrogen storage tank 1. In the initial state, the base frame 4 is at the bottom of the vertical stroke. The horizontal position of the ultrasonic probe 3 is changed by the synchronously moving transverse seats 5 until the two sets of transverse seats 5 stop moving in the horizontal direction, and the ultrasonic probe 3 is tightly attached to the outer wall of the liquid nitrogen storage tank 1.

[0037] At the same time, driven by the ring-moving component, the ultrasonic probe 3 can be driven to rotate in the horizontal direction, and during the rotation of the ultrasonic probe 3, the ultrasonic probe 3 can always be ensured to be close to the outer surface of the liquid nitrogen storage tank 1. Through the ring-moving component, different positions on the same horizontal line of the liquid nitrogen storage tank 1 can be detected.

[0038] At the same time, the lifting assembly and the circumferential movement assembly move synchronously. The lifting assembly can adjust the relative position of the ultrasonic probe 3 and the liquid nitrogen storage tank 1 by changing the horizontal height of the transverse seat 5 and the base 4, so that the ultrasonic probe 3 can detect different height positions of the liquid nitrogen storage tank 1. Among them, through the coordinated use of the lifting assembly and the circumferential movement assembly, the ultrasonic probe 3 can be driven to perform a spiral upward movement along the outer wall of the liquid nitrogen storage tank 1, thereby performing a comprehensive inspection of the liquid nitrogen storage tank 1, effectively covering the entire surface of the liquid nitrogen storage tank 1, avoiding dead angles that conventional tools cannot detect due to structural limitations, especially hidden positions and fine gaps, and ensuring the comprehensiveness and accuracy of crack detection.

[0039] In one of the more preferred embodiments, the base frame 4 is provided with a transverse threaded rod 7 which is driven by a motor and rotates freely in the vertical direction. The transverse threaded rod 7 rotates on a fixed axis on the base frame 4. Two groups of directional threaded cylinders 8 which move synchronously toward or away from each other are threadedly connected to the transverse threaded rod 7. The directional threaded cylinders 8 rotate on a fixed axis on the transverse displacement seat 5. The transverse displacement seat 5 is provided with a positioning component for limiting the rotation of the directional threaded cylinder 8.

[0040] The positioning assembly includes a receiving groove opened on the transverse displacement seat 5, in which a positioning block 10 is slidably connected, and a positioning groove 9 for plugging into the directional threaded cylinder 8 corresponding to the position of the positioning block 10 is opened, and a reset spring 11 is also provided in the receiving groove, and the two ends of the reset spring 11 are respectively fixedly connected to the positioning block 10 and the transverse displacement seat 5.

[0041] like Figure 1 、 Figure 4 and Figure 6As shown, the transverse threaded rod 7 is driven to rotate freely in the vertical direction by a motor fixed on the base frame 4, wherein the output end of the motor is connected to the transverse threaded rod 7 by transmission. When the motor is started, the transverse threaded rod 7 can be driven to rotate, and in the initial state, the positioning block 10 is in the positioning groove 9. Therefore, the directional threaded cylinder 8 is restricted by the positioning block 10 and cannot rotate synchronously with the transverse threaded rod 7. Then, when the transverse threaded rod 7 rotates, the directional threaded cylinder 8 can drive the transverse displacement seat 5 to move in the horizontal direction.

[0042] Among them, the ultrasonic probe 3 is arranged on the transverse movement seat 5, and the transverse movement seat 5 is driven to move toward the liquid nitrogen storage tank 1 through the rotation of the transverse threaded rod 7, so that the transverse movement seat 5 can be tightly attached to the outer wall of the liquid nitrogen storage tank 1, and when the positioning block 10 is in the positioning groove 9, the transverse threaded rod 7 will not drive the directional threaded cylinder 8 to rotate, and when the transverse movement seat 5 moves to the horizontal stroke terminal, the positioning block 10 can be disengaged from the positioning groove 9, and then when the transverse threaded rod 7 continues to rotate, the directional threaded cylinder 8 will no longer be restricted by the positioning block 10. At this time, the directional threaded cylinder 8 will follow the transverse threaded rod 7 to rotate synchronously in the vertical direction, and the horizontal position of the transverse movement seat 5 will not change.

[0043] At the same time, both the annular assembly and the lifting assembly are driven by the rotation process of the directional threaded barrel 8. Therefore, in actual use, when the ultrasonic probe 3 moves horizontally toward the liquid nitrogen storage tank 1, the annular assembly and the lifting assembly will not operate. After the ultrasonic probe 3 collides with the liquid nitrogen storage tank 1 and the transverse movement seat 5 is at the end of the horizontal stroke, the rotation process of the directional threaded barrel 8 drives the annular assembly and the lifting assembly to operate synchronously, so as to drive the ultrasonic probe 3 to move in a spiral trajectory and close to the surface of the liquid nitrogen storage tank 1, thereby realizing all-round detection of the liquid nitrogen storage tank 1 and avoiding detection blind spots.

[0044] Based on the embodiment of the positioning assembly, the annular moving assembly includes a blocking rod 13 provided on the transverse displacement seat 5, and the transverse displacement seat 5 is provided with a rectangular groove for the blocking rod 13 to slide through, and the blocking rod 13 is detachably connected to a semicircular support seat 15, and the semicircular support seat 15 is provided with a freely rotatable semicircular outer gear ring 16;

[0045] The semicircular support seat 15 is provided with an arc groove for sliding connection of the semicircular outer gear ring 16, and the semicircular outer gear ring 16 is meshedly connected with the side gear 20. The side gear 20 is connected to the directional threaded cylinder 8 through transmission, and the side gear 20 rotates on the semicircular support seat 15 on a fixed axis.

[0046] A relief pin 12 is fixedly connected to one side of the positioning block 10 facing the blocking rod 13 , and a V-shaped groove 14 for the relief pin 12 to be slidably connected is formed on the blocking rod 13 .

[0047] A circular structure is formed between the two groups of semicircular support seats 15 and is coaxial with the liquid nitrogen storage tank 1 and accommodates the liquid nitrogen storage tank 1 .

[0048] like Figure 1 、 Figure 2 and Figure 4 As shown, when the transverse shift seat 5 moves in the horizontal direction, it can drive the blocking rod 13 set thereon to move synchronously. Among them, when the opposite surfaces of the blocking rods 13 on the two groups of transverse shift seats 5 collide, the two groups of blocking rods 13 cannot continue to move in the horizontal direction. At this time, as the transverse threaded rod 7 rotates, the transverse shift seat 5 continues to move horizontally, and the horizontal position of the blocking rod 13 does not change. Therefore, relative displacement will occur between the transverse shift seat 5 and the blocking rod 13.

[0049] At the same time, the positioning block 10 is set in the transverse seat 5, and when the blocking rod 13 and the transverse seat 5 are relatively displaced, the give way pin 12 on the positioning block 10 can slide on the V-shaped groove 14. At this time, the horizontal height of the give way pin 12 and the positioning block 10 changes, and the return spring 11 is compressed and deformed to drive the positioning block 10 out of the positioning groove 9. Then, when the transverse threaded rod 7 rotates subsequently, the directional threaded cylinder 8 will no longer be restricted by the positioning block 10, so the directional threaded cylinder 8 will subsequently rotate with the transverse threaded rod 7.

[0050] In addition, the blocking rod 13 and the semicircular support seat 15 are detachably connected by bolts. When the two groups of transverse seats 5 move toward each other synchronously and the blocking rods 13 on them abut against each other, the arc-shaped ends of the blocking rods 13 on the two groups of transverse seats 5 also contact each other, so that the two groups of semicircular support seats 15 together form a closed circular structure.

[0051] At the same time, a side gear 20 is rotated on the fixed axis on the semicircular support seat 15, and the side gear 20 is meshed with the semicircular outer gear ring 16. Therefore, when the horizontal position of the blocking rod 13 no longer changes and the directional threaded barrel 8 rotates synchronously with the transverse threaded rod 7, the directional threaded barrel 8 can drive the side gear 20 connected to it to rotate synchronously, and the side gears 20 set on the two groups of transverse seats 5 rotate in unison. Furthermore, the rotation process of the side gear 20 drives the two groups of semicircular outer gear rings 16 to rotate on the two groups of semicircular support seats 15 to detect different horizontal positions of the liquid nitrogen storage tank 1.

[0052] Based on the embodiment of the annular moving assembly, a spline cylinder 17 is fixedly connected to the inner circumference of the semicircular outer gear ring 16, and a spline shaft 18 is provided on the spline cylinder 17. The spline cylinder 17 is provided with a spline groove for the spline shaft 18 to be horizontally slidably connected. A yield spring 19 is provided in the spline groove, and the two ends of the yield spring 19 are respectively fixedly connected to the spline shaft 18 and the spline cylinder 17;

[0053] The ultrasonic probe 3 is fixedly connected to one end of the spline shaft 18 away from the spline cylinder 17 .

[0054] like Figure 1 、 Figure 2 and Figure 5 As shown, when the transverse displacement seat 5 moves in the horizontal direction with the rotation of the transverse threaded rod 7, it can drive the blocking rod 13, the semicircular support seat 15 and the semicircular outer gear ring 16 arranged thereon to move horizontally synchronously, wherein the semicircular outer gear ring 16 can drive the ultrasonic probe 3 to move toward the liquid nitrogen storage tank 1 when moving horizontally, and make the ultrasonic probe 3 contact the outer wall of the liquid nitrogen storage tank 1.

[0055] Among them, when the ultrasonic probe 3 collides with the liquid nitrogen storage tank 1, as the subsequent transverse displacement seat 5 continues to rotate, the ultrasonic probe 3 drives the semicircular outer gear ring 16 to continue to move toward the liquid nitrogen storage tank 1. Since the ultrasonic probe 3 has already colliding with the liquid nitrogen storage tank 1, the ultrasonic probe 3 and the spline shaft 18 cannot continue to move. At this time, the yield spring 19 undergoes compression deformation. By arranging the yield spring 19 on the spline cylinder 17, it is ensured that the ultrasonic probe 3 can always be in contact with the outer wall of the liquid nitrogen storage tank 1, so that it can adapt to liquid nitrogen storage tanks 1 of different diameters. Effective crack detection can be performed on liquid nitrogen storage tanks 1 of different diameters to improve its applicability.

[0056] Furthermore, the lifting assembly includes an L-shaped frame 23 fixedly connected to the transverse seat 5, and a vertical threaded rod 24 that can rotate freely in the horizontal direction is provided on the L-shaped frame 23, and the vertical threaded rod 24 rotates on the L-shaped frame 23 with a fixed axis;

[0057] The vertical threaded rod 24 is threadedly connected to an internal threaded barrel 25 , and the bracket frame 2 is provided with a transverse sliding groove 26 for horizontal sliding connection of the internal threaded barrel 25 .

[0058] The horizontal threaded rod 7 is sleeved with a hollow cylinder 27, and the hollow cylinder 27 is coaxially fixed on the directional threaded cylinder 8. The hollow cylinder 27 is fixedly sleeved with a driving bevel gear 21, and the driving bevel gear 21 is meshedly connected with a driven bevel gear 22. The driven bevel gear 22 is coaxially fixed to the vertical threaded rod 24.

[0059] like Figures 1-4 As shown, when the directional threaded cylinder 8 rotates freely in the vertical direction following the transverse threaded rod 7, it can drive the hollow cylinder 27 coaxially fixed thereon to rotate synchronously, wherein a driving bevel gear 21 is fixedly sleeved on the hollow cylinder 27. The driving bevel gear 21 rotates following the hollow cylinder 27 and can drive the driven bevel gear 22 meshing with it to rotate, thereby driving the driven bevel gear 22 and the vertical threaded rod 24 coaxially arranged thereon to rotate in the horizontal direction.

[0060] At the same time, the vertical threaded rod 24 is threadedly matched with the internal threaded cylinder 25. When the vertical threaded rod 24 rotates, the vertical threaded rod 24 can gradually enter the internal threaded cylinder 25. An L-shaped frame 23 is provided on the transverse movement seat 5, and the driven bevel gear 22 and the vertical threaded rod 24 are both fixedly axially set on the L-shaped frame 23 to drive the driven bevel gear 22 and the active bevel gear 21 to move horizontally synchronously with the transverse movement seat 5, and the internal threaded cylinder 25 is slidably connected to the armature frame 2 through the transverse slide groove 26. The transverse slide groove 26 opened on the armature frame 2 is used to adapt to the horizontal position change of the transverse movement seat 5 to ensure that when the position of the transverse movement seat 5 no longer changes, the horizontal height of the base frame 4 and the ultrasonic probe 3 can be changed through the transverse movement seat 5.

[0061] It should be noted that, in actual use, both sets of transverse seats 5 are provided with lifting assemblies. By providing two sets of lifting assemblies, the stability of the transverse seat 5 and the base frame 4 when the height changes is ensured, and the vertical threaded rods 24 in the two sets of lifting assemblies are transmission-connected with the directional threaded cylinders 8 at the corresponding positions. In actual use, the thread directions of the vertical threaded rods 24 and the internal threaded cylinders 25 are adapted to ensure that the vertical threaded rods 24 in the two sets of lifting assemblies can move upward or downward synchronously.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A crack detection tool for repairing a liquid nitrogen cryotherapy device, comprising an ultrasonic probe (3) for detecting cracks in a liquid nitrogen storage tank (1), and a support frame (2) for supporting the ultrasonic probe (3), characterized in that: The anchor frame (2) is provided with a rotating structure for driving the ultrasonic probe (3) to perform crack detection on the liquid nitrogen storage tank (1) in a spiral trajectory; The rotating structure comprises a base frame (4) arranged on a hinge frame (2), and a vertical slide groove is provided on the hinge frame (2) for the base frame (4) to slide freely in a vertical direction, the base frame (4) is provided with two groups of transverse shift seats (5) that move synchronously toward or away from each other, the ultrasonic probe (3) is arranged on the transverse shift seat (5), and the transverse shift seat (5) is provided with a ring-moving component that drives the ultrasonic probe (3) to adhere to the surface of the liquid nitrogen storage tank (1) and rotate horizontally; A guide column (6) is slidably passed through the transverse seat (5), and both ends of the guide column (6) are fixedly connected to the base frame (4). A lifting component for adjusting the horizontal height of the base frame (4) is provided on the hinge frame (2).

2. A gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 1, characterized in that: The base frame (4) is provided with a transverse threaded rod (7) driven by a motor and freely rotating in a vertical direction. The transverse threaded rod (7) rotates on a fixed axis on the base frame (4). Two groups of directional threaded cylinders (8) that move synchronously toward or away from each other are threadedly connected to the transverse threaded rod (7). The directional threaded cylinders (8) rotate on a fixed axis on a transverse displacement seat (5). A positioning component for limiting the rotation of the directional threaded cylinders (8) is provided on the transverse displacement seat (5).

3. The gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 2, characterized in that: The positioning assembly includes a receiving groove provided on the transverse shift seat (5), a positioning block (10) is slidably connected in the receiving groove, a positioning groove (9) for plugging into the directional threaded cylinder (8) corresponding to the position of the positioning block (10), and a reset spring (11) is also provided in the receiving groove, and the two ends of the reset spring (11) are respectively fixedly connected to the positioning block (10) and the transverse shift seat (5).

4. The gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 3, characterized in that: The annular moving assembly comprises a blocking rod (13) arranged on a transverse displacement seat (5), and a rectangular groove for the blocking rod (13) to slide through is provided on the transverse displacement seat (5), a semicircular support seat (15) is detachably connected to the blocking rod (13), and a freely rotatable semicircular outer gear ring (16) is provided on the semicircular support seat (15); The semicircular support seat (15) is provided with an arc groove for sliding connection of the semicircular outer gear ring (16), the semicircular outer gear ring (16) is meshedly connected with a side gear (20), the side gear (20) and the directional threaded cylinder (8) are in transmission connection, and the side gear (20) rotates on the semicircular support seat (15) with a fixed axis; A relief pin (12) is fixedly connected to one side of the positioning block (10) facing the blocking rod (13), and a V-shaped groove (14) for sliding connection of the relief pin (12) is provided on the blocking rod (13).

5. The gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 4, characterized in that: A circular structure is formed between the two groups of semicircular support seats (15) and is coaxial with the liquid nitrogen storage tank (1) and accommodates the liquid nitrogen storage tank (1).

6. The gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 5, characterized in that: A spline cylinder (17) is fixedly connected to the inner circumference of the semicircular outer gear ring (16), a spline shaft (18) is provided on the spline cylinder (17), and a spline groove for horizontal sliding connection of the spline shaft (18) is opened on the spline cylinder (17), a yield spring (19) is provided in the spline groove, and two ends of the yield spring (19) are respectively fixedly connected to the spline shaft (18) and the spline cylinder (17); The ultrasonic probe (3) is fixedly connected to one end of the spline shaft (18) away from the spline cylinder (17).

7. The gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 6, characterized in that: The lifting assembly comprises an L-shaped frame (23) fixedly connected to the transverse seat (5), the L-shaped frame (23) being provided with a vertical threaded rod (24) freely rotatable in the horizontal direction, and the vertical threaded rod (24) being fixedly rotated on the L-shaped frame (23); The vertical threaded rod (24) is threadedly connected to an internal threaded barrel (25), and a transverse sliding groove (26) for horizontal sliding connection of the internal threaded barrel (25) is provided on the bracket frame (2).

8. The gap-finding tool for repairing a liquid nitrogen cryotherapy device according to claim 7, characterized in that: A hollow cylinder (27) is sleeved on the transverse threaded rod (7), and the hollow cylinder (27) is coaxially fixed on the directional threaded cylinder (8). A driving bevel gear (21) is fixedly sleeved on the hollow cylinder (27), and the driving bevel gear (21) is meshedly connected with a driven bevel gear (22). The driven bevel gear (22) and the vertical threaded rod (24) are coaxially fixed.

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