Non-destructive clamping device

Abstract

The application relates to the technical field of track construction, and a non-destructive clamping device which comprises a base, clamping plates, a first abutting assembly and a second abutting assembly. The clamping plates abut one side of the web of a steel rail body, and two clamping plates are symmetrically distributed along the length direction of the steel rail body. The base is located below the steel rail body, the first abutting assembly and the second abutting assembly are connected to the base, and the first abutting assembly and the second abutting assembly abut one side of the two clamping plates away from the steel rail body. The two clamping plates clamp the steel rail body through the first abutting assembly and the second abutting assembly, the steel rail body is reinforced, drilling operation is not needed, the steel rail body is non-destructively reinforced, and the reliability of the device is improved.

Description

Technical Field

[0001] This application relates to the field of track construction technology, and in particular to a non-destructive clamping device. Background Technology

[0002] Currently, railway technology is widely used in countries around the world, especially the recent high-speed rail technology, which is becoming increasingly important in my country's national economic life because it is suitable for China's national conditions. Railway technology mainly includes two parts: locomotive technology and track technology. Compared with the ever-improving locomotive technology, the improvement of track technology is relatively slow.

[0003] Currently, railway tracks are mainly made of steel rails, typically with two rails running parallel to each other on a row of sleepers. Over long periods of train operation, cracks will inevitably develop in the rails; some are external, some are internal, but most are invisible to the naked eye.

[0004] To ensure train safety, rails require routine maintenance. If a crack is found in a rail, the maintenance personnel must report it immediately for train safety. However, to reduce losses caused by railway line stoppages, the impact of the crack on train safety will be assessed. If the rail can still meet train operation needs, emergency reinforcement measures will be taken at the crack to avoid affecting the normal passage of trains.

[0005] The existing emergency reinforcement measures mainly involve fastening corresponding rail clamps (steel rail joint clamps) to both sides of the rail web at the crack, extending a certain distance to both ends; the holes on the clamps are aligned with each other, and holes are drilled at the rail web at the locations of the clamp holes to insert bolts and fix the clamps on both sides of the rail web, thereby clamping and fixing the cracked rail to ensure that trains can pass normally at a lower safe speed.

[0006] However, drilling is not convenient along railway lines, and drilling can damage the overall structural strength of the rails, further affecting their safety. Utility Model Content

[0007] To reduce damage to the rails caused by drilling during repairs, this application provides a non-destructive clamping device.

[0008] The non-destructive clamping device provided in this application adopts the following technical solution: A non-destructive clamping device includes a base, clamping plates, a first clamping component, and a second clamping component. The clamping plates abut against one side of the rail web of the rail body. Two clamping plates are provided and symmetrically distributed along the length direction perpendicular to the rail body. The base is located below the rail body. The first clamping component and the second clamping component are both connected to the base. The first clamping component and the second clamping component abut against the two clamping plates on the side away from the rail body, respectively.

[0009] By adopting the above technical solution, the two clamping plates are pressed together by the first clamping component and the second clamping component, so that the two clamping plates clamp the rail body, thereby strengthening the rail body without drilling, achieving non-destructive strengthening of the rail body and improving the reliability of the device.

[0010] Preferably, the first clamping component includes a fixed seat connected to the base, the fixed seat abutting against the side surface of any clamping plate away from the rail body. The second clamping component includes a second abutting block and a sliding seat, the second abutting block abutting against the side surface of another clamping plate away from the rail body, the sliding seat being slidably connected to the base, the sliding direction of the sliding seat being vertical, and the side of the second abutting block away from the clamping plate having a first chamfer, the first chamfer being located at the upper end of the second abutting block, the first chamfer being used to abut against the lower end of the sliding seat.

[0011] By adopting the above technical solution, the fixed seat is fixedly connected to the base, and the fixed seat abuts against the clamping plate on one side of the rail body to realize the positioning between the device, the rail body and the clamping plate on one side. The sliding seat slides against the first chamfer and pushes the second abutting block to press against the clamping plate on the other side, so that the clamping plates on both sides clamp the rail body, realize the installation of the device, meet the clamping operation of rail bodies of different widths, and improve the applicability of the device.

[0012] Preferably, the first clamping component further includes a first connector, the first connector including a first connecting bolt and a first anti-loosening washer, the fixing seat including a first connecting hole, the base having a first fixing hole, the first connecting bolt passing through the first connecting hole and threadedly connected to the first fixing hole, the first anti-loosening washer being sleeved on the outer periphery of the shank of the first connecting bolt, the first anti-loosening washer abutting against the side of the fixing seat away from the base, and the two opposing surfaces of the first loosening washer and the head of the first connecting bolt both having a first helical surface, the first helical surfaces being complementary and interlocking.

[0013] By adopting the above technical solution, the first connecting bolt passes through the first connecting hole and is threaded into the first fixing hole, which facilitates the fixed connection between the fixing seat and the base. The first anti-loosening washer cooperates with the first connecting bolt to reduce the possibility of the first connecting bolt loosening after installation, thereby improving the convenience and reliability of the device clamping.

[0014] Preferably, the base is provided with a positioning groove, and a positioning strip is connected to the side of the fixing seat near the base, the positioning strip being embedded in the positioning groove.

[0015] By adopting the above technical solution, the positioning strip is embedded in the positioning groove to achieve the initial fixation of the fixing seat and the base, which facilitates the subsequent alignment of the first connecting hole with the first fixing hole, and improves the stability of the connection between the fixing seat and the base, thereby improving the convenience and reliability of the device.

[0016] Preferably, a guide block is connected to the side of the base near the sliding seat, and the end of the sliding seat away from the second abutment block is in contact with the surface of the guide block near the sliding seat. The end of the sliding seat near the second abutment block is provided with a second chamfer, which is located at the lower end of the sliding seat and abuts against the first chamfer.

[0017] By adopting the above technical solution, the guide block guides the sliding of the sliding seat. The end of the sliding seat near the second abutment block is provided with a second chamfer, which abuts against the first chamfer, increasing the contact area between the sliding seat and the second abutment block, improving the stability of the sliding of the sliding seat and the second abutment block, and improving the reliability of the device.

[0018] Preferably, the second clamping component further includes a second connector, which includes a second connecting bolt and a second connecting nut. The base is provided with a second connecting hole, and the sliding seat is provided with a third connecting hole. The second connecting bolt passes through the second connecting hole and the third connecting hole in sequence. The second connecting nut is threadedly connected to the second connecting bolt and abuts against the upper end of the sliding seat.

[0019] By adopting the above technical solution, the second connecting bolt passes through the second connecting hole and the third connecting hole in sequence, and the second connecting nut is threaded onto the second connecting bolt, which facilitates the fixed connection between the sliding seat and the base and improves the ease of clamping the device.

[0020] Preferably, the second connector further includes a second anti-loosening washer, which is sleeved on the outer periphery of the second connecting bolt shank and located between the second connecting nut and the sliding seat. The two opposing surfaces of the second anti-loosening washer and the second connecting nut are provided with a second helical surface, which complement each other.

[0021] By adopting the above technical solution, the second anti-loosening washer cooperates with the second connecting nut, reducing the possibility of the second connecting nut becoming loose after installation and improving the reliability of the device.

[0022] Preferably, the second connector further includes a limiting pin; a limiting hole is provided on the side of the second connecting bolt away from the head of the second connecting bolt; the limiting pin is embedded in the limiting hole.

[0023] By adopting the above technical solution, the limiting pin is embedded in the limiting hole. The limiting pin is used to abut the end of the second connecting nut away from the head of the second connecting bolt, which reduces the possibility of the second connecting nut coming off the second connecting bolt during use or carrying, thus increasing the service life of the device.

[0024] Preferably, the second connector further includes a retaining spring, and the outer periphery of the second connecting bolt rod is provided with a retaining groove, the retaining spring being embedded in the retaining groove, and the retaining spring abutting against the side surface of the base near the sliding seat.

[0025] By adopting the above technical solution, the second connecting bolt and the base are relatively fixed along the axis of the second connecting bolt, reducing the possibility of the second connecting bolt moving vertically during the clamping process and improving the convenience of clamping.

[0026] Preferably, the base has a groove on the side away from the sliding seat, the head of the second connecting bolt is embedded in the groove, and the side wall of the head of the second connecting bolt is in contact with the side wall of the groove.

[0027] By adopting the above technical solution, the head of the second connecting bolt is embedded in the groove, which makes it easy for the lower end face of the base to remain flat. The side wall of the head of the second connecting bolt fits into the side wall of the groove, so that the second connecting bolt and the base are relatively fixed along the circumference of the second connecting bolt. This makes the second connecting bolt relatively fixed when the second connecting nut is threadedly connected to the second connecting bolt, thus improving the ease of clamping the device.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. The first and second clamping components clamp the two clamping plates together, thereby reinforcing the rail body without the need for drilling, achieving non-destructive reinforcement of the rail body and improving the reliability of the device. 2. The fixed seat is fixedly connected to the base. The fixed seat and the base are fixedly connected through the first connector, which realizes the positioning between the device, the rail body and one side clamp. The sliding seat slides against the first chamfer and pushes the second abutment block to press against the other side clamp, so that the clamps on both sides clamp the rail body. The sliding seat and the base are fixedly connected through the second connector, which realizes the installation of the device, meets the clamping operation of rail bodies of different widths, and improves the applicability of the device. 3. The guide block guides the sliding of the sliding seat. The end of the sliding seat near the second abutment block is provided with a second chamfer. The second chamfer abuts against the first chamfer, increasing the contact area between the sliding seat and the second abutment block, improving the stability of the sliding of the sliding seat and the second abutment block, and improving the reliability of the device. Attached Figure Description

[0029] Figure 1This is a cross-sectional view of a non-destructive clamping device.

[0030] Figure 2 This is a schematic diagram of the non-destructive clamping device.

[0031] Figure 3 This is an exploded structural diagram of the base and the second clamping assembly.

[0032] Figure 4 This is an exploded structural diagram of the base and the first clamping assembly.

[0033] Explanation of reference numerals in the attached figures: 1. Base; 11. First fixing hole; 12. Positioning groove; 13. Guide block; 14. Second connecting hole; 15. Embedded groove; 16. Groove; 2. Plywood; 3. First clamping component; 31. First abutting block; 311. Arc groove; 312. Third chamfer; 32. Fixing base; 321. Base plate; 3211. First connecting hole; 322. Positioning strip; 323. Connecting plate; 324. Reinforcing rib; 325. Protruding strip; 33. First connecting piece; 331. First connecting bolt; 332. First anti-loosening washer; 333. First spiral surface; 4. Second clamping component; 41. Second abutting block; 411. First chamfer; 412. Abutting groove; 42. Sliding seat; 421. Second chamfer; 422. Third connecting hole; 423. Fixing groove; 43. Second connecting piece; 431. Second connecting bolt; 4311. Slot; 4312. Limiting hole; 432. Second connecting nut; 433. Second anti-loosening washer; 434. Second spiral surface; 435. Snap ring; 436. Limiting pin. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 This application discloses a non-destructive clamping device including a base 1. The upper end of the base 1 is provided with a groove 16. The groove 16 penetrates the base 1 along one side of the length direction of the base 1. The groove 16 is used for embedding the rail body. The bottom of the groove 16 abuts against the lower end of the middle rail of the rail body.

[0036] Reference Figure 1 and Figure 2A non-destructive clamping device further includes a clamping plate 2 and a second clamping component 4. The clamping plate 2 abuts against one side surface of the rail web of the rail body. The side wall of the clamping plate 2 is in contact with the side wall of the rail web of the rail body, the side surface of the rail head near the rail web of the rail body, and the side surface of the rail bottom near the rail web of the rail body. Two clamping plates 2 are provided, and the two clamping plates 2 are symmetrically distributed along the length of the rail body. A guide block 13 is fixedly connected to one side surface of the base 1 near the groove 16. One side surface of the guide block 13 along the length of the base 1 is flush with the end of the base 1 away from the groove 16 along the length of the base 1. The second clamping component 4 abuts against the side surface of the clamping plate 2 away from the rail body near the guide block 13. The second clamping component 4 includes a second abutting block 41 and a sliding seat 42. The second abutting block 41 abuts against the side surface of the clamping plate 2 away from the rail body near the guide block 13. The side of the second abutting block 41 near the clamping plate 2 is provided with an abutting groove 412. The side of the abutting groove 412 near the base 1 passes through the second abutting block 41. The abutting groove 412 passes through the second abutting block 41 on both sides along the length direction of the rail body. The abutting groove 412 is used for the clamping plate 2 to be embedded. The groove wall of the abutting groove 412 abuts against the side surface of the clamping plate 2 away from the base 1 and the side surface of the clamping plate 2 away from the rail body. The sliding seat 42 is slidably connected between the second abutment block 41 and the guide block 13. The sliding direction of the sliding seat 42 is vertical. The end of the sliding seat 42 away from the guide block 13 is provided with a fixing groove 423. The fixing groove 423 passes through the sliding seat 42 in the vertical direction. The end of the second abutment block 41 near the guide block 13 is embedded in the fixing groove 423. The two ends of the second abutment block 41 along the length of the rail body are in contact with the groove wall of the fixing groove 423. The end of the sliding seat 42 away from the second abutment block 41 is in contact with the side surface of the guide block 13 near the rail body. The end of the second abutment block 41 away from the abutment groove 412 is provided with a first chamfer 411. The first chamfer 411 is located at the end of the second abutment block 41 away from the base 1. The bottom of the fixing groove 423 is provided with a second chamfer 421. The second chamfer 421 is located on the side of the fixing groove 423 near the base 1. The second chamfer 421 is used to abut against the first chamfer 411.

[0037] Reference Figure 1 and Figure 3The second clamping assembly 4 also includes a second connector 43, which is connected between the base 1 and the sliding seat 42 to achieve a fixed connection between the sliding seat 42 and the base 1. The second connector 43 includes a second connecting bolt 431, a second anti-loosening washer 433, a second connecting nut 432, a retaining spring 435, and a limiting pin 436. The base 1 has a groove 15 on the side away from the guide block 13, and a second connecting hole 14 is provided at the bottom of the groove 15. The sliding seat 42 has a third connecting hole 422. The shank of the second connecting bolt 431 passes through the second connecting hole 14 and the third connecting hole 422 in sequence, and the head of the second connecting bolt 431 is embedded in the groove 15. The side wall of the head of the second connecting bolt 431 is in contact with the groove wall of the groove 15. The shank of the second connecting bolt 431 has a groove 4311, and the retaining spring 435 is embedded in the groove 4311. The retaining spring 435 abuts against the surface of the base 1 near the sliding seat 42. The second anti-loosening washer 433 is sleeved on the outer periphery of the shank of the second connecting bolt 431. The second anti-loosening washer 433 abuts against the side surface of the sliding seat 42 away from the base 1. The second connecting nut 432 is threadedly connected to the second connecting bolt 431. The second connecting nut 432 abuts against the side surface of the anti-loosening washer away from the sliding seat 42. The two opposing surfaces of the second connecting nut 432 and the second anti-loosening washer 433 are provided with a second helical surface 434, which are interlocked. The second connecting bolt 431 is provided with a limiting hole 4312 on the side away from the head of the second connecting bolt 431. The axis of the limiting hole 4312 is perpendicular to the axis of the second connecting bolt 431, and the axis of the limiting hole 4312 is coplanar with the axis of the second connecting bolt 431. The limiting pin 436 is embedded in the limiting hole 4312.

[0038] Reference Figure 1 and Figure 2A non-destructive clamping device further includes a first clamping component 3, which clamps the side surface of the clamping plate 2 away from the guide block 13 and away from the rail body. The first clamping component 3 includes a fixing seat 32 and a first abutting block 31. The fixing seat 32 includes a base plate 321, a connecting plate 323, a reinforcing rib 324, a protruding strip 325, and a positioning strip 322. The base plate 321 is embedded in the groove 16, and the lower end of the base plate 321 is in contact with the groove wall of the groove 16. The positioning strip 322 is fixedly connected to the side surface of the base plate 321 near the bottom of the groove 16. The positioning strip 322 is located on the side of the base plate 321 away from the rail body. The bottom of the groove 16 is provided with a positioning groove 12, which penetrates the base 1 along the length of the rail body. The positioning strip 322 is embedded in the positioning groove 12, and the side wall of the positioning strip 322 is in contact with the groove wall of the positioning groove 12. The lower end of the connecting plate 323 is fixedly connected to the end of the base plate 321 near the rail body. A reinforcing rib 324 connects the connecting plate 323 and the base plate 321, extending from the surface of the connecting plate 323 away from the rail body to the surface of the base plate 321 away from the positioning strip 322. A protruding strip 325 is fixedly connected to the surface of the connecting plate 323 near the rail body. The protruding strip 325 is located on the side of the connecting plate 323 away from the base plate 321, and the cross-section of the side of the protruding strip 325 away from the connecting plate 323 is arc-shaped. The first abutment block 31 is embedded between the fixed base 32 and the clamping plate 2. One side surface of the first abutment block 31 abuts against the side surface of the clamping plate 2 away from the rail body. The side of the first abutment block 31 away from the clamping plate 2 is provided with an arc-shaped groove 311. The groove wall of the arc-shaped groove 311 fits against the outer wall of the protrusion 325. The two ends of the protrusion 325 along the length direction perpendicular to the base 1 are used to abut against the two sides of the arc-shaped groove 311 along the length direction perpendicular to the base 1. The lower end of the first abutment block 31 is provided with a third chamfer 312. The third chamfer 312 is located on the side of the first abutment block 31 closer to the fixed base 32 and is used to abut against the protrusion 325.

[0039] Reference Figure 2 and Figure 4The first clamping component 3 also includes a first connector 33, which is connected between the fixed seat 32 and the base 1 to achieve a fixed connection between the fixed seat 32 and the base 1. The bottom of the groove 16 is provided with a first fixing hole 11, which penetrates the base 1 vertically. There are two first fixing holes 11, which are symmetrically distributed along the length of the rail body. The base plate 321 is provided with a first connecting hole 3211. The number of first connecting holes 3211 and first connecting parts 33 is the same as the number of first fixing holes 11 and they correspond one-to-one. The first connecting part 33 includes a first connecting bolt 331 and a first anti-loosening washer 332. The first connecting bolt 331 passes through the first connecting hole 3211 and is threadedly connected to the first fixing hole 11. The first anti-loosening washer 332 is located between the head of the first connecting bolt 331 and the base plate 321. The first anti-loosening washer 332 is sleeved on the outer periphery of the shank of the first connecting bolt 331. The first anti-loosening washer 332 abuts against the side surface of the base plate 321 away from the bottom of the groove 16. The head of the first connecting bolt 331 abuts against the side surface of the first anti-loosening washer 332 away from the base plate 321. The two opposing surfaces of the head of the first connecting bolt 331 and the first anti-loosening washer 332 are provided with a first helical surface 333, and the first helical surfaces 333 are interlocked.

[0040] The implementation principle of the non-destructive clamping device in this application embodiment is as follows: The limiting pin 436 is removed from the limiting hole 4312; the second connecting nut 432 and the second washer 433 are removed from the second connecting bolt 431; the shank of the second connecting bolt 431 is passed through the second connecting hole 14; and the retaining spring 435 is embedded in the retaining groove 4311 to achieve relative fixation between the second connecting bolt 431 and the base 1 along the axial direction of the second connecting bolt 431. The end of the base 1 away from the guide block 13 is slid through the underside of the rail body, so that the bottom of the groove 16 fits against the lower end of the rail bottom in the rail body.

[0041] Positioning strip 322 is embedded in positioning groove 12, and fixed seat 32 is slidable so that the two first connecting holes 3211 are aligned with the two first connecting holes 3211 respectively. Two first anti-loosening washers 332 are placed on the side of base plate 321 away from the bottom of groove 16. The shank of first connecting bolt 331 passes through the inner side of first anti-loosening washer 332 and first connecting hole 3211 and is threaded to first fixed hole 11 to achieve fixed connection between fixed seat 32 and base 1. A clamping plate 2 is placed on the side of rail body near fixed seat 32, and protrusion 325 is embedded in arc groove 311. Base 1 is pulled so that fixed seat 32 abuts against first abutting block 31, and first abutting block 31 abuts against clamping plate 2.

[0042] Another clamping plate 2 is placed on the other side of the rail body. The groove wall of the abutment groove 412 abuts against the outer wall of the clamping plate 2. The shank of the second connecting bolt 431 passes through the third connecting hole 422. The end of the sliding seat 42 away from the rail body is in contact with the guide block 13. The sliding seat 42 is pushed downward, and the second chamfer 421 abuts against the first chamfer 411, pushing the second abutment block 41 to slide closer to the first abutment block 31, so that the two clamping plates 2 clamp the rail body. The second anti-loosening washer 433 is sleeved on the outer periphery of the shank of the second connecting bolt 431, and the second connecting nut 432 is threadedly connected to the second connecting bolt 431 to achieve a fixed connection between the sliding seat 42 and the base 1.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A non-destructive clamping device, characterized in that: It includes a base (1), a clamping plate (2), a first clamping component (3), and a second clamping component (4); the clamping plate (2) abuts against one side of the rail web of the rail body; there are two clamping plates (2); the two clamping plates (2) are symmetrically distributed along the length direction perpendicular to the rail body; the base (1) is located below the rail body; the first clamping component (3) and the second clamping component (4) are both connected to the base (1); the first clamping component (3) and the second clamping component (4) abut against the side of the two clamping plates (2) away from the rail body respectively.

2. The non-destructive clamping device according to claim 1, characterized in that: The first clamping component (3) includes a fixed seat (32); the fixed seat (32) is connected to the base (1); the fixed seat (32) abuts against the side surface of any clamping plate (2) away from the rail body; the second clamping component (4) includes a second abutting block (41) and a sliding seat (42); the second abutting block (41) abuts against the side surface of another clamping plate (2) away from the rail body; the sliding seat (42) is slidably connected to the base (1); the sliding direction of the sliding seat (42) is vertical; the side of the second abutting block (41) away from the clamping plate (2) is provided with a first chamfer (411); the first chamfer (411) is located at the upper end of the second abutting block (41); the first chamfer (411) is used to abut against the lower end of the sliding seat (42).

3. The non-destructive clamping device according to claim 2, characterized in that: The first clamping component (3) further includes a first connector (33); the first connector (33) includes a first connecting bolt (331) and a first anti-loosening washer (332); the fixing seat (32) includes a first connecting hole (3211); the base (1) is provided with a first fixing hole (11); the first connecting bolt (331) passes through the first connecting hole (3211) and is threadedly connected to the first fixing hole (11); the first anti-loosening washer (332) is sleeved on the outer periphery of the rod of the first connecting bolt (331); the first anti-loosening washer (332) abuts against the side of the fixing seat (32) away from the base (1); the two surfaces facing each other of the heads of the first anti-loosening washer (332) and the first connecting bolt (331) are provided with a first helical surface (333); the first helical surfaces (333) are complementary and interlocked.

4. The non-destructive clamping device according to claim 3, characterized in that: The base (1) is provided with a positioning groove (12); the fixed seat (32) is connected to a positioning strip (322) on the side near the base (1); the positioning strip (322) is embedded in the positioning groove (12).

5. The non-destructive clamping device according to claim 2, characterized in that: The base (1) is connected to a guide block (13) on the side near the sliding seat (42); the end of the sliding seat (42) away from the second abutment block (41) is in contact with the surface of the guide block (13) near the sliding seat (42); the end of the sliding seat (42) near the second abutment block (41) is provided with a second chamfer (421); the second chamfer (421) is located at the lower end of the sliding seat (42); the second chamfer (421) abuts against the first chamfer (411).

6. The non-destructive clamping device according to claim 5, characterized in that: The second clamping component (4) further includes a second connector (43); the second connector (43) includes a second connecting bolt (431) and a second connecting nut (432); the base (1) is provided with a second connecting hole (14); the sliding seat (42) is provided with a third connecting hole (422); the second connecting bolt (431) passes through the second connecting hole (14) and the third connecting hole (422) in sequence; the second connecting nut (432) is threadedly connected to the second connecting bolt (431); the second connecting nut (432) abuts against the upper end of the sliding seat (42).

7. The non-destructive clamping device according to claim 6, characterized in that: The second connector (43) further includes a second anti-loosening washer (433); the second anti-loosening washer (433) is sleeved on the outer periphery of the rod of the second connecting bolt (431); the second anti-loosening washer (433) is located between the second connecting nut (432) and the sliding seat (42); the two opposing surfaces of the second anti-loosening washer (433) and the second connecting nut (432) are provided with a second helical surface (434); the second helical surfaces (434) are complementary and interlocked.

8. The non-destructive clamping device according to claim 7, characterized in that: The second connector (43) also includes a limiting pin (436); the second connecting bolt (431) has a limiting hole (4312) on the side away from the head of the second connecting bolt (431); the limiting pin (436) is embedded in the limiting hole (4312).

9. The non-destructive clamping device according to claim 6, characterized in that: The second connector (43) also includes a retaining ring (435); the outer periphery of the rod of the second connecting bolt (431) is provided with a retaining groove (4311); the retaining ring (435) is embedded in the retaining groove (4311); the retaining ring (435) abuts against the side surface of the base (1) near the sliding seat (42).

10. The non-destructive clamping device according to claim 6, characterized in that: The base (1) has a groove (15) on the side away from the sliding seat (42); the head of the second connecting bolt (431) is embedded in the groove (15); the side wall of the head of the second connecting bolt (431) is in contact with the side wall of the groove (15).

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