Phased array scanning frame device for detecting plug-in fillet weld

Abstract

The utility model belongs to the technical field of nondestructive testing, and particularly relates to a phased array scanning frame device for detecting plug-in fillet welds, which is characterized in that a clamping mechanism realizes the action of clamping a sliding plate to adjust the clamping thickness of a device; the moving mechanism realizes the action of adjusting the position of the phased array ultrasonic probe by the upper moving plate; and the angle adjusting mechanism realizes the action of rotating the bottom plate to adjust the angle of the phased array ultrasonic probe. According to the phased array scanning frame device for detecting the plug-in fillet weld, a clamping motor, an upper moving motor and a lower moving motor are synchronously controlled through a PLC, a clamping sliding plate is adjusted to enable the device to be stably connected to the surface of a detected workpiece, movement of an upper moving plate is adjusted, the position of a phased array ultrasonic probe is changed, and the angle of a rotating bottom plate is adjusted; the angle of the phased array ultrasonic probe for detecting the welding seam is changed, the elliptical track of the inserted welding seam is detected, and the technical problem that an existing scanning device cannot detect the elliptical track of the inserted welding seam is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nondestructive testing technical field especially relates to a detection plug -in type fillet's phased array scanning frame device. BACKGROUND

[0002] A kind of phased array ultrasonic detection scanning device suitable for multiple fillet (announcement number: CN217655060U) is disclosed on Chinese patent website, although it solves the technical problem that reference line needs to be drawn in advance on workpiece scanning surface when traditional phased array detection, it is difficult to guarantee that phased array ultrasonic probe travels along reference line when scanning, probe moving track deviates from reference line and causes defect positioning deviation in weld and defect missed detection, but still has the following problems:

[0003] In actual use process, only by adjusting fixed bolt to make fixed frame rotate to appropriate angle according to detection object, to fixed frame is attached to detection surface, then moves fixed frame to adjust distance, then is locked by fastening bolt, and two guide magnetic wheels on positioning rod are attracted to the side wall of workpiece, by the disclosed technical scheme, the elliptical track of plug-in type weld cannot be detected, so it is inconvenient to use. UTILITY MODEL CONTENT

[0004] Based on the technical problem that existing scanning device cannot detect the elliptical track of plug-in type weld, the utility model provides a phased array scanning frame device for detecting plug-in type fillet.

[0005] The utility model provides a phased array scanning frame device for detecting plug-in type fillet, including installation box, the lower part of installation box is separately provided with clamping mechanism, moving mechanism and angle adjusting mechanism.

[0006] The clamping mechanism includes clamping slide, and the clamping mechanism realizes the action of clamping slide adjusting device clamping thickness.

[0007] The clamping mechanism is located above the moving mechanism, and the angle adjusting mechanism is located below the moving mechanism.

[0008] The moving mechanism includes upper moving plate, and the moving mechanism realizes the action of upper moving plate adjusting phased array ultrasonic probe position.

[0009] The angle adjusting mechanism includes rotating bottom plate, and the angle adjusting mechanism realizes the action of rotating bottom plate adjusting phased array ultrasonic probe angle.

[0010] Preferably, the clamping mechanism further comprises clamping screws, the surface of the clamping screw is rotatably connected with the surface of the mounting box, the surface of the clamping screw is fixedly connected with a clamping pulley, two clamping screws are symmetrically distributed with the axis of the mounting box as the center, the surfaces of the two clamping pulleys are drivingly connected through a belt, the surface of the mounting box is fixedly connected with a clamping motor, and the output shaft of the clamping motor is fixedly connected with one end of the clamping screw through a shaft coupling.

[0011] Preferably, the surface of the clamping slide plate is slidingly connected with the surface of the mounting box, the surface of the clamping slide plate is threadedly connected with the surface of the two clamping screws respectively, the lower surface of the mounting box is fixedly connected with fixed magnetic wheels, the two fixed magnetic wheels are symmetrically distributed with the axis of the mounting box as the center, the lower surface of the clamping slide plate is fixedly connected with movable magnetic wheels, and the two movable magnetic wheels are symmetrically distributed with the axis of the clamping slide plate as the center.

[0012] Preferably, the moving mechanism further comprises a connecting plate, the surface of the connecting plate is fixedly connected with the lower surface of the mounting box, the surface of the connecting plate is slidingly connected with the surface of the upper moving plate, the surface of the mounting box is rotatably connected with an upper moving screw, the surface of the upper moving screw is rotatably connected with the surface of the connecting plate, the surface of the upper moving screw is threadedly connected with the surface of the upper moving plate, the surface of the upper moving screw is fixedly connected with an upper moving pulley, two upper moving screws are symmetrically distributed with the axis of the mounting box as the center, the surfaces of the two upper moving pulleys are drivingly connected through a belt, the upper surface of the mounting box is fixedly connected with an upper moving motor, and the output shaft of the upper moving motor is fixedly connected with one end of the upper moving screw through a shaft coupling.

[0013] Preferably, the lower surface of the upper moving plate is fixedly connected with a lower fixed plate, the surface of the lower fixed plate is fixedly connected with supporting magnetic wheels, the two supporting magnetic wheels are symmetrically distributed with the axis of the lower fixed plate as the center, the surface of the lower fixed plate is rotatably connected with lower moving screws, the surface of the lower moving screw is fixedly connected with lower moving pulleys, the two lower moving screws are symmetrically distributed with the axis of the lower fixed plate as the center, the surfaces of the two lower moving pulleys are drivingly connected through a belt, the surface of the lower fixed plate is fixedly connected with a lower moving motor, the output shaft of the lower moving motor is fixedly connected with one end of the lower moving screw through a shaft coupling, the surface of the lower fixed plate is slidingly connected with a lower moving block, and the surface of the lower moving block is threadedly connected with the surfaces of the two lower moving screws respectively.

[0014] Preferably, the angle adjusting mechanism further comprises a rotating shaft, the surface of the rotating shaft is rotationally connected with the surface of the lower moving block, the surface of the lower moving block is rotationally connected with an adjusting worm, one end of the adjusting worm is fixedly connected with an adjusting hand wheel, one end of the rotating shaft is fixedly connected with an adjusting worm wheel, the surface of the adjusting worm is in transmission connection with the surface of the adjusting worm wheel, the surface of the rotating shaft is fixedly connected with the surface of the rotating base plate, the surface of the rotating base plate is slidably connected with a clamping jaw, the two clamping jaws are symmetrically distributed with the axis of the rotating base plate as the center, the surface of the rotating base plate is fixedly connected with a guide rod, a plurality of guide rods are symmetrically distributed with the axis of the rotating base plate as the center, the outer side of the guide rod is provided with a clamping spring, the surface of the clamping jaw is slidably connected with the surface of the guide rod, the two ends of the clamping spring are fixedly connected with the surface of the rotating base plate and the surface of the clamping jaw, and the surfaces of the two clamping jaws are fixedly connected with anti-skid pads.

[0015] The utility model discloses the beneficial effect that:

[0016] Through setting up clamping mechanism, moving mechanism and angle adjusting mechanism, through PLC controller synchronous control clamping motor, upper mobile motor and lower mobile motor, through clamping slide plate adjustment is close to the device inside clamping, makes the device stable connection in the surface of detection workpiece, through moving mechanism adjustment upper moving plate's removal, changes the position of the phased array ultrasonic probe below the upper moving plate, through angle adjusting mechanism adjustment rotating base plate's angle, changes the angle of the phased array ultrasonic probe detection weld below the rotating base plate, realized to the elliptical track of plug-in type weld and detected, solved the technical problem that the existing scanning device can not detect the elliptical track of plug-in type weld. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of schematic diagram of the phased array scanning frame device for detecting plug-in type fillet weld that the utility model proposes;

[0018] Figure 2 It is the installation box structure perspective drawing of the phased array scanning frame device for detecting plug-in type fillet weld that the utility model proposes;

[0019] Figure 3 It is the clamping screw structure perspective drawing of the phased array scanning frame device for detecting plug-in type fillet weld that the utility model proposes;

[0020] Figure 4 It is the clamping pulley structure perspective drawing of the phased array scanning frame device for detecting plug-in type fillet weld that the utility model proposes;

[0021] Figure 5The utility model provides a kind of detection of the upper moving plate structure perspective drawing of the phased array scanning frame device of plug-in fillet.

[0022] Figure 6 The utility model provides a kind of detection of the upper moving belt wheel structure perspective drawing of the phased array scanning frame device of plug-in fillet.

[0023] Figure 7 The utility model provides a kind of detection of the lower fixed plate structure perspective drawing of the phased array scanning frame device of plug-in fillet.

[0024] Figure 8 The utility model provides a kind of detection of the lower moving belt wheel structure perspective drawing of the phased array scanning frame device of plug-in fillet.

[0025] Figure 9 The utility model provides a kind of detection of the rotating bottom plate structure perspective drawing of the phased array scanning frame device of plug-in fillet.

[0026] Figure 10 The utility model provides a kind of detection of the guide rod structure perspective drawing of the phased array scanning frame device of plug-in fillet.

[0027] In the drawing: 1, installation box;2, clamping slide plate;3, upper moving plate;4, rotating bottom plate;201, clamping screw;202, clamping pulley;203, clamping motor;204, fixed magnetic wheel;205, moving magnetic wheel;301, connecting plate;302, upper moving screw;303, upper moving pulley;304, upper moving motor;305, lower fixed plate;306, support magnetic wheel;307, lower moving screw;308, lower moving pulley;309, lower moving motor;310, lower moving block;401, rotating shaft;402, adjusting worm;403, adjusting hand wheel;404, adjusting worm wheel;405, clamping jaw;406, guide rod;407, clamping spring;408, antiskid pad. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model.

[0029] Refer to Figures 1-10 A kind of detection of the phased array scanning frame device of plug-in fillet, including installation box 1, the lower of installation box 1 is respectively provided with clamping mechanism, moving mechanism and angle adjusting mechanism.

[0030] Clamping mechanism is located the upper of moving mechanism, angle adjusting mechanism is located the lower of moving mechanism.

[0031] The clamping mechanism comprises a clamping slide plate 2, and the clamping mechanism realizes the action of adjusting the thickness of the clamping slide plate 2.

[0032] The moving mechanism comprises an upper moving plate 3, and the moving mechanism realizes the action of adjusting the position of the phased array ultrasonic probe of the upper moving plate 3.

[0033] The angle adjusting mechanism comprises a rotating bottom plate 4, and the angle adjusting mechanism realizes the action of adjusting the angle of the phased array ultrasonic probe of the rotating bottom plate 4.

[0034] The clamping mechanism further comprises clamping screws 201, the surfaces of the clamping screws 201 are rotationally connected with the surface of the mounting box 1, the surface of each clamping screw 201 is fixedly connected with a clamping pulley 202, the two clamping screws 201 are symmetrically distributed around the axis of the mounting box 1, the surfaces of the two clamping pulleys 202 are drivingly connected through a belt, the surface of the mounting box 1 is fixedly connected with a clamping motor 203, and the output shaft of the clamping motor 203 is fixedly connected with one end of the clamping screw 201 through a coupling.

[0035] Further, the clamping motor 203 drives the clamping screw 201 to rotate, and the two clamping pulleys 202 on the surfaces of the two clamping screws 201 are drivingly connected through a belt to realize the action of synchronous rotation of the two clamping screws 201.

[0036] The surface of the clamping slide plate 2 is slidingly connected with the surface of the mounting box 1, the surface of the clamping slide plate 2 is threadedly connected with the surfaces of the two clamping screws 201 respectively, the lower surface of the mounting box 1 is fixedly connected with fixed magnetic wheels 204, the two fixed magnetic wheels 204 are symmetrically distributed around the axis of the mounting box 1, the lower surface of the clamping slide plate 2 is fixedly connected with moving magnetic wheels 205, and the two moving magnetic wheels 205 are symmetrically distributed around the axis of the clamping slide plate 2.

[0037] Further, the two clamping screws 201 drive the moving magnetic wheels 205 to move towards the fixed magnetic wheels 204 through the clamping slide plate 2 to realize the action of fixing the device on the surface of the workpiece.

[0038] The moving mechanism further comprises a connecting plate 301, the surface of the connecting plate 301 is fixedly connected with the lower surface of the mounting box 1, the surface of the connecting plate 301 is slidingly connected with the surface of the upper moving plate 3, the surface of the mounting box 1 is rotationally connected with upper moving screws 302, the surface of each upper moving screw 302 is rotationally connected with the surface of the connecting plate 301, the surface of each upper moving screw 302 is threadedly connected with the surface of the upper moving plate 3, the surface of each upper moving screw 302 is fixedly connected with an upper moving pulley 303, the two upper moving screws 302 are symmetrically distributed around the axis of the mounting box 1, the surfaces of the two upper moving pulleys 303 are drivingly connected through a belt, the upper surface of the mounting box 1 is fixedly connected with an upper moving motor 304, and the output shaft of the upper moving motor 304 is fixedly connected with one end of each upper moving screw 302 through a coupling.

[0039] Further, the upper moving motor 304 drives the upper moving plate 3 to move up and down along the surface of the connecting plate 301 through the two upper moving screws 302.

[0040] The lower surface of the upper moving plate 3 is fixedly connected with a lower fixed plate 305, the surface of the lower fixed plate 305 is fixedly connected with a supporting magnetic wheel 306, the two supporting magnetic wheels 306 are symmetrically distributed with the axis of the lower fixed plate 305 as the center, the surface of the lower fixed plate 305 is rotatably connected with a lower moving screw 307, the surface of the lower moving screw 307 is fixedly connected with a lower moving pulley 308, the two lower moving screws 307 are symmetrically distributed with the axis of the lower fixed plate 305 as the center, the surfaces of the two lower moving pulleys 308 are drivingly connected through a belt, the surface of the lower fixed plate 305 is fixedly connected with a lower moving motor 309, the output shaft of the lower moving motor 309 is fixedly connected with one end of the lower moving screw 307 through a shaft coupling, the surface of the lower fixed plate 305 is slidingly connected with a lower moving block 310, and the surface of the lower moving block 310 is threadedly connected with the surfaces of the two lower moving screws 307 respectively.

[0041] Further, the lower moving motor 309 drives the lower moving block 310 to slide along the surface of the lower fixed plate 305 through the two lower moving screws 307.

[0042] The angle adjusting mechanism further comprises a rotating shaft 401, the surface of the rotating shaft 401 is rotatably connected with the surface of the lower moving block 310, the surface of the lower moving block 310 is rotatably connected with an adjusting worm 402, one end of the adjusting worm 402 is fixedly connected with an adjusting hand wheel 403, one end of the rotating shaft 401 is fixedly connected with an adjusting worm wheel 404, the surface of the adjusting worm 402 is drivingly connected with the surface of the adjusting worm wheel 404, the surface of the rotating shaft 401 is fixedly connected with the surface of a rotating bottom plate 4, the surface of the rotating bottom plate 4 is slidingly connected with a clamping jaw 405, the two clamping jaws 405 are symmetrically distributed with the axis of the rotating bottom plate 4 as the center, the surface of the rotating bottom plate 4 is fixedly connected with a guide rod 406, a plurality of guide rods 406 are symmetrically distributed with the axis of the rotating bottom plate 4 as the center, the outer side of the guide rod 406 is provided with a clamping spring 407, the surfaces of the clamping jaws 405 are slidingly connected with the surfaces of the plurality of guide rods 406 respectively, the two ends of the clamping spring 407 are fixedly connected with the surface of the rotating bottom plate 4 and the surface of the clamping jaw 405 respectively, and the surfaces of the two clamping jaws 405 are both fixedly connected with an anti-skid pad 408.

[0043] Further, the adjusting hand wheel 403 drives the adjusting worm 402 to rotate, the adjusting worm 402 and the adjusting worm wheel 404 are in meshing transmission, and the rotating bottom plate 4 on one side of the adjusting worm wheel 404 is driven to rotate to adjust the angle.

[0044] By setting the clamping mechanism, moving mechanism and angle adjusting mechanism, the clamping motor 203, the upper moving motor 304 and the lower moving motor 309 are synchronously controlled by the PLC controller, the device is stably connected to the surface of the detected workpiece by adjusting the clamping to the inside of the device through the clamping slide plate 2, the movement of the upper moving plate 3 is adjusted through the moving mechanism, the position of the phased array ultrasonic probe below the upper moving plate 3 is changed, the angle of the rotating bottom plate 4 is adjusted through the angle adjusting mechanism, the angle of the phased array ultrasonic probe below the rotating bottom plate 4 for detecting the weld is changed, and the technical problem that the existing scanning device cannot detect the elliptical track of the plug-in weld is solved.

[0045] Working principle:

[0046] Before use, the clamping motor 203 on the surface of the drive mounting box 1 drives the clamping screw rod 201 to rotate, the clamping pulley 202 arranged on the surface of the two clamping screw rods 201 is driven by the belt to realize synchronous rotation of the two clamping screw rods 201, and the clamping slide plate 2 threadedly connected to the surface of the two clamping screw rods 201 slides outward along the surface of the mounting box 1, so that the device is placed above the detection workpiece. The clamping motor 203 drives the clamping slide plate 2 to slide inward along the surface of the mounting box 1, the plurality of moving magnetic wheels 205 arranged below the clamping slide plate 2 clamps the detection workpiece in cooperation with the plurality of fixed magnetic wheels 204 arranged on the lower surface of the mounting box 1, the plurality of supporting magnetic wheels 306 fixedly connected to one side of the fixed plate are located below the fixed magnetic wheels 204, the supporting magnetic wheels 306 are connected to the surface of the detection workpiece to make the device parallel to the detection surface, the device moves along the surface of the detection workpiece through the plurality of moving magnetic wheels 205, the fixed magnetic wheels 204 and the supporting magnetic wheels 306, drives the phased array ultrasonic probe to move along the weld track, the upper moving motor 304 above the drive mounting box 1 drives the upper moving screw rod 302 to rotate, the upper moving pulley 303 arranged on the surface of the two upper moving screw rods 302 is driven by the belt to realize synchronous rotation of the two upper moving screw rods 302, and the upper moving plate 3 threadedly connected to the surface of the two upper moving screw rods 302 slides up and down along the surface of the connecting plate 301. The lower fixed plate 305 is arranged below the upper moving plate 3, the lower moving motor 309 on the surface of the lower fixed plate 305 is driven, the lower moving screw rod 307 is driven by the lower moving motor 309 to rotate, the lower moving pulley 308 arranged on the surface of the two lower moving screw rods 307 is driven by the belt to realize synchronous rotation of the two lower moving screw rods 307, and the lower moving block 310 threadedly connected to the surface of the two lower moving screw rods 307 slides along the surface of the lower fixed plate 305. The surface of the lower moving block 310 is rotationally connected to the rotating bottom plate 4 through the rotating shaft 401, the adjusting worm 402 on the surface of the lower moving block 310 is driven by adjusting the hand wheel 403 to rotate, the adjusting worm 402 is in meshing transmission with the adjusting worm gear 404 fixedly connected to one end of the rotating shaft 401, the rotating bottom plate 4 fixedly connected to the surface of the rotating shaft 401 is driven to rotate, the surface of the rotating bottom plate 4 is elastically connected to the surfaces of the two clamping jaws 405 through a plurality of clamping springs 407, the inner side of the clamping spring 407 is provided with a guide rod 406, the surface of the clamping jaw 405 is provided with an anti-skid pad 408, and the two clamping jaws 405 clamp the phased array ultrasonic probe in cooperation. The clamping angle of the phased array ultrasonic probe in the detection of the weld is adjusted by manually rotating the adjusting hand wheel 403, the phased array ultrasonic probe is driven to move along the weld track in the phased array scanning process by controlling the clamping motor 203, the upper moving motor 304 and the lower moving motor 309 through the PLC controller, the elliptical track of the plug-in weld is detected, and the technical problem that the existing scanning device cannot detect the elliptical track of the plug-in weld is solved.

[0047] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A phased array scan frame apparatus for detecting plug welds, comprising a mounting box (1), characterised in that: The lower part of the installation box (1) is respectively provided with a clamping mechanism, a moving mechanism and an angle adjusting mechanism; The clamping mechanism is located above the moving mechanism, and the angle adjusting mechanism is located below the moving mechanism; The clamping mechanism comprises a clamping sliding plate (2), and the clamping mechanism realizes the action of adjusting the thickness of the clamping sliding plate (2); The moving mechanism comprises an upper moving plate (3), and the moving mechanism realizes the action of adjusting the position of the phased array ultrasonic probe of the upper moving plate (3); The angle adjusting mechanism comprises a rotating bottom plate (4), and the angle adjusting mechanism realizes the action of adjusting the angle of the phased array ultrasonic probe of the rotating bottom plate (4).

2. A phased array scan head apparatus for detecting plug welds according to claim 1, wherein: The clamping mechanism further comprises clamping screws (201), the surfaces of the clamping screws (201) are rotationally connected with the surface of the installation box (1), the surface of each clamping screw (201) is fixedly connected with a clamping pulley (202), the two clamping screws (201) are symmetrically distributed about the axis of the installation box (1), the surfaces of the two clamping pulleys (202) are drivingly connected through a belt, the surface of the installation box (1) is fixedly connected with a clamping motor (203), and the output shaft of the clamping motor (203) is fixedly connected with one end of the clamping screw (201) through a coupling.

3. A phased array scan head apparatus for detecting plug welds according to claim 2, wherein: The surface of the clamping sliding plate (2) is slidingly connected with the surface of the installation box (1), the surface of the clamping sliding plate (2) is threadedly connected with the surfaces of the two clamping screws (201) respectively, the lower surface of the installation box (1) is fixedly connected with fixed magnetic wheels (204), the two fixed magnetic wheels (204) are symmetrically distributed about the axis of the installation box (1), and the lower surface of the clamping sliding plate (2) is fixedly connected with moving magnetic wheels (205), the two moving magnetic wheels (205) are symmetrically distributed about the axis of the clamping sliding plate (2).

4. The phased array scan-bridge apparatus for inspecting plug- wise welds of claim 1, wherein: The moving mechanism further comprises a connecting plate (301), the surface of the connecting plate (301) is fixedly connected with the lower surface of the installation box (1), the surface of the connecting plate (301) is slidingly connected with the surface of the upper moving plate (3), the surface of the installation box (1) is rotationally connected with an upper moving screw (302), the surface of the upper moving screw (302) is rotationally connected with the surface of the connecting plate (301), the surface of the upper moving screw (302) is threadedly connected with the surface of the upper moving plate (3), the surface of the upper moving screw (302) is fixedly connected with an upper moving pulley (303), the two upper moving screws (302) are symmetrically distributed about the axis of the installation box (1), the surfaces of the two upper moving pulleys (303) are drivingly connected through a belt, the upper surface of the installation box (1) is fixedly connected with an upper moving motor (304), and the output shaft of the upper moving motor (304) is fixedly connected with one end of the upper moving screw (302) through a coupling.

5. The phased array scan head apparatus for detecting plug welds of claim 1, wherein: The lower surface of the upper moving plate (3) is fixedly connected with a lower fixed plate (305), the surface of the lower fixed plate (305) is fixedly connected with a supporting magnetic wheel (306), two supporting magnetic wheels (306) are symmetrically distributed with the axis of the lower fixed plate (305) as the center, the surface of the lower fixed plate (305) is rotatably connected with a lower moving screw (307), the surface of the lower moving screw (307) is fixedly connected with a lower moving pulley (308), two lower moving screws (307) are symmetrically distributed with the axis of the lower fixed plate (305) as the center, the surfaces of two lower moving pulleys (308) are drivingly connected through a belt, the surface of the lower fixed plate (305) is fixedly connected with a lower moving motor (309), the output shaft of the lower moving motor (309) is fixedly connected with one end of the lower moving screw (307) through a shaft coupling, and the surface of the lower fixed plate (305) is slidingly connected with a lower moving block (310), and the surface of the lower moving block (310) is threadedly connected with the surfaces of two lower moving screws (307) respectively.

6. A phased array scan head apparatus for detecting plug welds according to claim 5, wherein: The angle adjusting mechanism further comprises a rotating shaft (401), the surface of the rotating shaft (401) is rotatably connected with the surface of the lower moving block (310), the surface of the lower moving block (310) is rotatably connected with an adjusting worm (402), one end of the adjusting worm (402) is fixedly connected with an adjusting hand wheel (403), one end of the rotating shaft (401) is fixedly connected with an adjusting worm wheel (404), the surface of the adjusting worm (402) is drivingly connected with the surface of the adjusting worm wheel (404), the surface of the rotating shaft (401) is fixedly connected with the surface of the rotating bottom plate (4), the surface of the rotating bottom plate (4) is slidingly connected with a clamping jaw (405), two clamping jaws (405) are symmetrically distributed with the axis of the rotating bottom plate (4) as the center, the surface of the rotating bottom plate (4) is fixedly connected with a guide rod (406), a plurality of guide rods (406) are symmetrically distributed with the axis of the rotating bottom plate (4) as the center, the outer side of the guide rod (406) is provided with a clamping spring (407), the surface of the clamping jaw (405) is slidingly connected with the surfaces of a plurality of guide rods (406) respectively, and the two ends of the clamping spring (407) are fixedly connected with the surface of the rotating bottom plate (4) and the surface of the clamping jaw (405) respectively. The surfaces of two clamping jaws (405) are both fixedly connected with a non-slip pad (408).

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