CN219348933U

CN219348933U - Cable withstand voltage test tool

Info

Publication number: CN219348933U
Application number: CN202320000587.0U
Authority: CN
Inventors: 普乐乐
Original assignee: Guangdong Maoyuan Data Co ltd
Current assignee: Guangdong Maoyuan Data Co ltd
Priority date: 2023-01-02
Filing date: 2023-01-02
Publication date: 2023-07-14
Anticipated expiration: 2033-01-02

Abstract

The utility model provides a cable withstand voltage test tool, which relates to the technical field of cable detection and comprises: an operation table; four support columns are fixedly connected with the bottom end of the operation table in a rectangular array shape; the bottom end surfaces of the four support columns are fixedly connected with a universal wheel; the rear part of the top end surface of the operation table is fixedly provided with a pressure-resistant detector body in the middle; an auxiliary frame is fixedly connected to the right part of the top end surface of the pressure-resistant detector body in the middle; the auxiliary frame is of a U-shaped block structure; three lower fixing seats are fixedly connected to the front part of the top end of the operating platform. After the auxiliary seat is lifted to a specified position, the suspended part of the cable is placed between the clamping seats, and the clamping seats are limited left and right through the supporting springs, so that the clamping seats are limited and fixed on the cable of the suspended part, and the problem that the cable position in the test is deviated due to shaking of the cable of the suspended part to influence the accuracy of the withstand voltage test result is solved.

Description

Cable withstand voltage test tool

Technical Field

The utility model relates to the technical field of cable detection, in particular to a cable withstand voltage test tool.

Background

In order to ensure long-term use of the cable, a worker is usually required to regularly perform a withstand voltage test to check faults existing in the cable, and in order to facilitate the withstand voltage test on the cable, the worker usually uses a withstand voltage test tool and an existing withstand voltage test tool.

For example: the utility model with the application number of CN202220547309.2 discloses a cable withstand voltage test platform, which comprises a test platform table, wherein an insulating layer is paved at the top of the test platform table, three-phase wiring mechanisms are arranged at the left side and the right side of the top of the test platform table, clamping mechanisms are arranged in two groups of three-phase wiring mechanisms, each group of three-phase wiring mechanisms comprises a multi-phase connecting terminal, three jacks are arranged in the multi-phase connecting terminal, the whole test platform is reasonable in structure, ingenious in design, flexible to use, convenient to lift and suitable for application scenes with different heights, three-phase electric cores in the three-phase cables can be detected independently, the efficiency of cable connection can be effectively improved by matching with the clamping mechanisms, the connection quality of the cables is guaranteed, and the cable withstand voltage test platform is difficult to mix up, has good reliability and safety, improves the convenience in loading and unloading of the cables, and provides convenience for the withstand voltage test of the cables, and has stronger practicability.

However, regarding the conventional withstand voltage test tool at present, when the withstand voltage test is performed, only one end of the cable is usually used for performing the test, and the other end of the cable is suspended, but the cable at the suspended part easily shakes, and once the cable at the suspended part shakes, the position of the cable in the test is deviated to influence the accuracy of the withstand voltage test result.

Disclosure of Invention

In view of the above, the utility model provides a cable withstand voltage test fixture, which is provided with a clamping seat capable of limiting and fixing a cable hanging part, wherein a control gear is driven to rotate through rotation of a fixed rotating shaft, a transmission rack meshed with the control gear is driven to lift through rotation of the control gear, a lifting column is driven to lift through movement of the transmission rack, and an auxiliary seat is driven to lift through lifting of the lifting column, so that the purpose of supporting and limiting the cable hanging part at different heights is achieved, the application range of the withstand voltage test fixture is improved, the practicability of the withstand voltage test fixture is effectively improved, after the auxiliary seat is lifted to a specified position, the cable hanging part is placed between the clamping seats, the clamping seat is limited left and right through a supporting spring, the clamping seat is enabled to limit and fix the cable at the hanging part, and the cable end of the cable to be tested is prevented from being deviated due to shaking of the cable hanging part in the process of withstand voltage detection of the cable, and the withstand voltage test result of the cable is influenced.

The utility model provides a cable withstand voltage test tool, which specifically comprises: an operation table; four support columns are fixedly connected with the bottom end of the operation table in a rectangular array shape; the bottom end surfaces of the four support columns are fixedly connected with a universal wheel; the rear part of the top end surface of the operation table is fixedly provided with a pressure-resistant detector body in the middle; an auxiliary frame is fixedly connected to the right part of the top end surface of the pressure-resistant detector body in the middle; the auxiliary frame is of a U-shaped block structure; three lower fixing seats are fixedly connected to the front part of the top end of the operating table; a group of connecting frames are symmetrically and fixedly connected to the outer walls of the three lower fixing seats; the front end surface of the operation table is fixedly connected with a mounting seat; three lifting columns are connected in a sliding manner in the mounting seat; the three lifting columns are aligned with the positions of the three lower fixing seats respectively.

Optionally, the top end surfaces of the inner walls of the three groups of connecting frames are fixedly connected with a group of connecting springs; the bottom end surfaces of the three groups of connecting springs are fixedly connected with a group of mounting plates; the bottom end surfaces of the three groups of mounting plates are fixedly connected with an upper fixing seat; the three upper fixing seats are respectively and slidably connected in the three groups of connecting frames; the three upper fixing seats are aligned with the positions of the three lower fixing seats respectively.

Optionally, a spool is fixedly connected to the top end surface of the pressure-resistant detector body; the coil holder is wound with a connecting wire; the tail end of the connecting wire is connected with a detection probe; the rear end surface of the inner wall of the auxiliary frame is fixedly connected with a first clamping block; the outer wall of the detection probe is contacted with the inner wall of the first clamping block; an auxiliary spring is fixedly connected with the front end face of the inner wall of the auxiliary frame in the middle; the tail end of the auxiliary spring is fixedly connected with a second clamping block; the second clamping block is aligned with the first clamping block.

Optionally, three fixed rotating shafts are rotationally connected to the mounting seat; a sliding groove is formed in the front parts of the three fixed rotating shafts; an auxiliary sliding rod is connected in each of the three sliding grooves in a sliding manner; the front end surfaces of the inner walls of the three sliding grooves are fixedly connected with a reset spring; the tail ends of the three reset springs are respectively and fixedly connected to the rear end face of the auxiliary sliding rod; the front parts of the outer walls of the three auxiliary sliding rods are fixedly connected with a connecting disc; the rear end surfaces of the three connecting discs are fixedly connected with a limiting clamping column; three groups of limiting jacks are formed in the front end face of the mounting seat; the three groups of limiting jacks are all arranged in an annular array; the three limit clamping columns are respectively inserted into the three groups of limit jacks; the front end surfaces of the three auxiliary sliding rods are fixedly connected with an operation handle.

Optionally, a control gear is fixedly connected to the outer walls of the three fixed rotating shafts in the middle; the right end surfaces of the three lifting columns are fixedly connected with a transmission rack in the middle; the three transmission racks are respectively meshed with the three control gears; the lower parts of the left end surfaces of the three lifting columns are fixedly connected with a guide sliding block; three guide sliding grooves are formed in the mounting seat; the three guide sliding blocks are respectively and slidably connected in the three guide sliding grooves.

Optionally, the top end surfaces of the three lifting columns are fixedly connected with an auxiliary seat; a group of clamping seats are aligned and rotationally connected in the top end surfaces of the three auxiliary seats; the outer sides of the three groups of clamping seats are fixedly connected with a group of supporting springs; the tail ends of the three groups of supporting springs are respectively and fixedly connected with the bottom end surfaces of the inner walls of the three auxiliary seats.

Advantageous effects

According to the utility model, in the use process, workers can be prevented from limiting and fixing the suspended part of the cable, so that the cable end for testing is prevented from being deviated due to shaking of the suspended part of the cable in the process of pressure-resistant detection of the cable, the accuracy of a cable pressure-resistant test result is effectively improved, and secondly, the workers can be used for pressure-resistant detection of cables with different thicknesses conveniently, and the applicability of a pressure-resistant test tool is increased.

In addition, drive control gear through the rotation of fixed pivot and rotate, drive the transmission rack that meshes with it through control gear's rotation and go up and down, drive the lifting column through the removal of transmission rack and go up and down, drive the auxiliary seat through the lift of lifting column and go up and down, after lifting the auxiliary seat to the assigned position, place the unsettled part of cable between the grip slipper, it is spacing about to the grip slipper through supporting spring, make the grip slipper carry out spacing fixed to the cable of unsettled part, prevent to rock the unsettled part of cable and take place to rock the cable end that leads to carrying out the test at the in-process that detects to the cable, influence the withstand voltage test result of cable.

In addition, the staff pulls the operating handle to enable the operating handle to drive the auxiliary sliding rod to slide in the sliding groove and extrude the reset spring, the connecting disc can drive the limiting clamping column to slide in the limiting jack in the sliding process of the auxiliary sliding rod, after the limiting clamping column is completely separated from the limiting jack, the staff can rotate the fixed rotating shaft, the staff can conveniently lock and limit the fixed rotating shaft, and accordingly the height of the lifting column is fixed.

In addition, when carrying out withstand voltage test to the cable, place down the fixing base on the fixing base simultaneously upwards pulling, make and go up the fixing base and slide and extrude connecting spring in the link, after the cable is placed the completion, loosen and go up the fixing base and make the fixing base fall down the joint and fix the cable down the fixing base, can make under connecting spring's elastic potential energy effect go up the fixing base and compress tightly with the cable laminating that can be better, the effectual fixed effect to the cable that increases, simultaneously can also conveniently grasp the cable of different thickness through connecting spring's elastic potential energy, increase withstand voltage test frock's suitability.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

In the drawings:

FIG. 1 is a schematic diagram of an axial structure of the present utility model.

Fig. 2 is a schematic diagram of the structure of the present utility model in a right-hand view.

Fig. 3 is an enlarged schematic view of the structure of fig. 2 at a in accordance with the present utility model.

Fig. 4 is a schematic cross-sectional view of the connector of the present utility model.

Fig. 5 is a schematic cross-sectional view of the mounting base of the present utility model.

FIG. 6 is a schematic diagram of a sectional structural axis of the mounting base of the present utility model.

Fig. 7 is an enlarged schematic view of the structure of fig. 6B according to the present utility model.

List of reference numerals

1. An operation table; 101. a support column; 102. a universal wheel; 103. a pressure-resistant detector body; 104. a spool stand; 105. a connecting wire; 106. a detection probe; 107. an auxiliary frame; 108. a first clamping block; 109. a second clamping block; 110. an auxiliary spring; 111. a lower fixing seat; 112. a connecting frame; 113. a connecting spring; 114. a mounting plate; 115. an upper fixing seat; 116. a mounting base; 117. fixing the rotating shaft; 118. a sliding groove; 119. an auxiliary slide bar; 120. a return spring; 121. a connecting disc; 122. limiting clamping columns; 123. an operating handle; 124. limiting jack; 125. a control gear; 126. lifting columns; 127. a guide slide block; 128. a guide chute; 129. an auxiliary seat; 130. a clamping seat; 131. a support spring; 132. and (5) driving the rack.

In order to make the objects, aspects and advantages of the technical solution of the present utility model more clear, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present utility model. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

Specific examples: please refer to fig. 1 to 7:

the utility model provides a cable withstand voltage test tool, which comprises: an operation table 1;

four support columns 101 are fixedly connected with the bottom end of the operation table 1 in a rectangular array shape; the bottom end surfaces of the four support columns 101 are fixedly connected with a universal wheel 102; the rear part of the top end surface of the operation table 1 is fixedly provided with a pressure-resistant detector body 103 in the middle; an auxiliary frame 107 is fixedly connected to the right part of the top end surface of the pressure-resistant detector body 103 in the middle; the auxiliary frame 107 has a U-shaped block structure; three lower fixing seats 111 are fixedly connected to the front part of the top end of the operating platform 1; a group of connecting frames 112 are symmetrically and fixedly connected to the outer walls of the three lower fixing seats 111; the front end surface of the operation table 1 is fixedly connected with a mounting seat 116; three lifting columns 126 are slidably connected to the mounting base 116; the three lifting columns 126 are aligned with the positions of the three lower fixing bases 111, respectively.

In addition, according to the embodiment of the present utility model, as shown in fig. 1 and 4, a group of connection springs 113 are fixedly connected to the top end surfaces of the inner walls of the three groups of connection frames 112; the bottom end surfaces of the three groups of connecting springs 113 are fixedly connected with a group of mounting plates 114; an upper fixing seat 115 is fixedly connected to the bottom end surfaces of the three groups of mounting plates 114; the three upper fixing bases 115 are respectively and slidably connected in the three groups of connecting frames 112; the three upper fixing seats 115 are aligned with the positions of the three lower fixing seats 111 respectively, so that when a voltage withstand test is carried out on a cable, the cable is placed on the lower fixing seats 111, the upper fixing seats 115 are pulled upwards simultaneously, the upper fixing seats 115 slide in the connecting frame 112 and squeeze the connecting springs 113, after the cable is placed, the upper fixing seats 115 are loosened, the upper fixing seats 115 are clamped on the lower fixing seats 111 to fix the cable, the upper fixing seats 115 can be better attached to the cable under the action of elastic potential energy of the connecting springs 113 to compress the cable, the fixing effect on the cable is effectively improved, meanwhile, cables with different thicknesses can be conveniently clamped through the elastic potential energy of the connecting springs 113, and the applicability of the voltage withstand test fixture is improved.

In addition, according to the embodiment of the present utility model, as shown in fig. 1 and 2, a spool 104 is fixedly connected to the top end face of the pressure-resistant gauge body 103; the coil holder 104 is wound with a connecting wire 105; the tail end of the connecting wire 105 is connected with a detection probe 106; the rear end surface of the inner wall of the auxiliary frame 107 is fixedly connected with a first clamping block 108; the outer wall of the detection probe 106 is in contact with the inner wall of the first clamping block 108; an auxiliary spring 110 is fixedly connected with the front end face of the inner wall of the auxiliary frame 107 in the middle; the tail end of the auxiliary spring 110 is fixedly connected with a second clamping block 109; the second clamping block 109 aligns with the position of the first clamping block 108 to when not using withstand voltage detector body 103 the staff can twine connecting wire 105 on spool 104, then place detection probe 106 between first clamping block 108 and the second clamping block 109, make second clamping block 109 press from both sides detection probe 106 through auxiliary spring 110's elasticity potential energy, make things convenient for the use of follow-up staff to withstand voltage detector body 103, improve withstand voltage test frock's practicality.

In addition, according to an embodiment of the present utility model, as shown in fig. 3 and 7, three fixed rotating shafts 117 are rotatably connected to the mounting base 116; a sliding groove 118 is formed in the front parts of the three fixed rotating shafts 117; an auxiliary slide bar 119 is slidably connected in each of the three slide grooves 118; the front end surfaces of the inner walls of the three sliding grooves 118 are fixedly connected with a return spring 120; the tail ends of the three return springs 120 are fixedly connected to the rear end face of the auxiliary slide bar 119 respectively; the front parts of the outer walls of the three auxiliary slide bars 119 are fixedly connected with a connecting disc 121; the rear end surfaces of the three connecting discs 121 are fixedly connected with a limiting clamping column 122; three groups of limiting jacks 124 are formed on the front end face of the mounting seat 116; the three groups of limiting jacks 124 are all arranged in an annular array; three limit clamping columns 122 are respectively inserted into three groups of limit jacks 124; the front end faces of the three auxiliary slide bars 119 are fixedly connected with an operation handle 123, so that when the pressure-proof test fixture is used, a worker pulls the operation handle 123 to enable the operation handle 123 to drive the auxiliary slide bars 119 to slide in the sliding grooves 118 and extrude the reset springs 120, the connecting disc 121 can drive the limiting clamping columns 122 to slide in the limiting insertion holes 124 in the sliding process of the auxiliary slide bars 119, and after the limiting clamping columns 122 are completely separated from the limiting insertion holes 124, the worker can rotate the fixed rotating shaft 117, and the worker can conveniently lock and limit the fixed rotating shaft 117 to fix the height of the lifting columns 126.

In addition, according to the embodiment of the present utility model, as shown in fig. 5, a control gear 125 is fixedly connected to the outer walls of each of the three fixed shafts 117 in the middle; the right end surfaces of the three lifting columns 126 are fixedly connected with a transmission rack 132 in the middle; the three transmission racks 132 are respectively meshed with the three control gears 125; the lower parts of the left end surfaces of the three lifting columns 126 are fixedly connected with a guide slide block 127; three guide sliding grooves 128 are formed in the mounting seat 116; three guide sliding blocks 127 are respectively and slidably connected in three guide sliding grooves 128, so that the control gear 125 is driven to rotate through rotation of the fixed rotating shaft 117, the transmission rack 132 meshed with the control gear 125 is driven to lift through rotation of the control gear 125, the lifting column 126 is driven to lift through movement of the transmission rack 132, the auxiliary seat 129 is driven to lift through lifting of the lifting column 126, the purpose of supporting and limiting a cable suspension part at different heights is achieved, the application range of the withstand voltage test tool is improved, and the practicability of the withstand voltage test tool is effectively improved.

In addition, according to the embodiment of the present utility model, as shown in fig. 5 and 6, the top end surfaces of the three lifting columns 126 are fixedly connected with an auxiliary seat 129; a group of clamping seats 130 are connected in alignment rotation in the top end surfaces of the three auxiliary seats 129; the outer sides of the three groups of clamping seats 130 are fixedly connected with a group of supporting springs 131; the end of three support springs 131 is fixed connection respectively in the bottom surface of three auxiliary seat 129 inner wall to after going up and down auxiliary seat 129 to the assigned position, place the unsettled part of cable between grip slipper 130, it is spacing about to grip slipper 130 through support spring 131, make grip slipper 130 carry out spacing fixed to the cable of unsettled part, prevent to rock the unsettled part of cable and lead to taking place the skew at the cable end that carries out the test in the in-process that detects withstand voltage to the cable, influence the withstand voltage test result of cable.

Specific use and action of the embodiment:

in the using process of the utility model, the pressure-resistant detection tool can be conveniently moved through the universal wheel 102, when the pressure-resistant test is carried out on the cable, the cable is placed on the lower fixing seat 111, the upper fixing seat 115 is pulled upwards at the same time, the upper fixing seat 115 slides in the connecting frame 112 and presses the connecting spring 113, after the placement of the cable is finished, the upper fixing seat 115 is loosened, the upper fixing seat 115 is clamped on the lower fixing seat 111 to fix the cable, the upper fixing seat 115 can be better attached to the cable under the action of the elastic potential energy of the connecting spring 113, the fixing effect on the cable is effectively improved, meanwhile, the cables with different thicknesses can be conveniently clamped through the elastic potential energy of the connecting spring 113, the applicability of the pressure-resistant test tool is increased, and when the pressure-resistant detector body 103 is not used, the staff can wind the connecting wire 105 on the coil-winding frame 104, then the detection probe 106 is placed between the first clamping block 108 and the second clamping block 109, the second clamping block 109 clamps the detection probe 106 through the elastic potential energy of the auxiliary spring 110, the use of the pressure-resistant detector body 103 by subsequent staff is facilitated, the practicability of the pressure-resistant test tool is improved, when the pressure-resistant test tool is used, the staff pulls the operation handle 123 to enable the operation handle 123 to drive the auxiliary slide bar 119 to slide in the sliding groove 118 and squeeze the return spring 120, the connecting disc 121 can drive the limit clamping column 122 to slide in the limit jack 124 in the sliding process of the auxiliary slide bar 119, after the limit clamping column 122 is completely separated from the limit jack 124, the staff can rotate the fixed rotating shaft 117, the staff can conveniently lock and limit the fixed rotating shaft 117 to fix the height of the lifting column 126, the control gear 125 is driven to rotate through the rotation of the fixed rotating shaft 117, the transmission rack 132 meshed with the control gear 125 is driven to lift through the rotation of the control gear 125, the lifting column 126 is driven to lift through the movement of the transmission rack 132, the auxiliary seat 129 is driven to lift through the lifting of the lifting column 126, so that the purpose of supporting and limiting the cable hanging parts at different heights is achieved, the application range of the withstand voltage test tool is improved, the practicability of the withstand voltage test tool is effectively improved, after the auxiliary seat 129 is lifted to a specified position, the hanging parts of the cables are placed between the clamping seats 130, the clamping seats 130 are limited left and right through the supporting springs 131, the clamping seats 130 are used for limiting and fixing the cables of the hanging parts, and the cable ends of the cables are prevented from being offset due to shaking in the cable hanging parts of the cables in the process of withstand voltage detection, and the test results of the cables are prevented from being influenced.

Claims

1. Cable withstand voltage test frock, its characterized in that includes: an operation table (1); four support columns (101) are fixedly connected with the bottom end of the operation table (1) in a rectangular array shape; the bottom end surfaces of the four supporting columns (101) are fixedly connected with universal wheels (102); the pressure-resistant detector body (103) is fixedly arranged at the center of the rear part of the top end surface of the operating platform (1); an auxiliary frame (107) is fixedly connected to the right part of the top end surface of the pressure-resistant detector body (103) in the middle; the auxiliary frame (107) is of a U-shaped block structure; three lower fixing seats (111) are fixedly connected to the front part of the top end of the operating table (1); a group of connecting frames (112) are symmetrically and fixedly connected to the outer walls of the three lower fixing seats (111); the front end surface of the operating table (1) is fixedly connected with a mounting seat (116); three lifting columns (126) are connected in a sliding manner in the mounting seat (116); the three lifting columns (126) are aligned with the positions of the three lower fixing seats (111) respectively.

2. The cable withstand voltage test fixture of claim 1, wherein: the top end surfaces of the inner walls of the three groups of connecting frames (112) are fixedly connected with a group of connecting springs (113); the bottom end surfaces of the three groups of connecting springs (113) are fixedly connected with a group of mounting plates (114); the bottom end surfaces of the three groups of mounting plates (114) are fixedly connected with an upper fixing seat (115); the three upper fixing seats (115) are respectively and slidably connected in the three groups of connecting frames (112); the three upper fixing seats (115) are aligned with the positions of the three lower fixing seats (111) respectively.

3. The cable withstand voltage test fixture of claim 1, wherein: a coil frame (104) is fixedly connected to the top end surface of the pressure-resistant detector body (103); a connecting wire (105) is wound on the coil holder (104); the tail end of the connecting wire (105) is connected with a detection probe (106); the rear end surface of the inner wall of the auxiliary frame (107) is fixedly connected with a first clamping block (108); the outer wall of the detection probe (106) is contacted with the inner wall of the first clamping block (108); an auxiliary spring (110) is fixedly connected with the front end surface of the inner wall of the auxiliary frame (107) in the middle; the tail end of the auxiliary spring (110) is fixedly connected with a second clamping block (109); the second clamping block (109) is aligned with the first clamping block (108).

4. The cable withstand voltage test fixture of claim 1, wherein: three fixed rotating shafts (117) are rotatably connected to the mounting seat (116); a sliding groove (118) is arranged in the front parts of the three fixed rotating shafts (117); an auxiliary slide bar (119) is connected in each of the three slide grooves (118) in a sliding way; the front end surfaces of the inner walls of the three sliding grooves (118) are fixedly connected with a return spring (120); the tail ends of the three return springs (120) are respectively and fixedly connected to the rear end face of the auxiliary slide bar (119); the front parts of the outer walls of the three auxiliary sliding rods (119) are fixedly connected with a connecting disc (121); the rear end surfaces of the three connecting discs (121) are fixedly connected with a limiting clamping column (122); three groups of limiting jacks (124) are formed on the front end face of the mounting seat (116); the three groups of limiting jacks (124) are all arranged in an annular array shape; the three limit clamping columns (122) are respectively inserted into the three groups of limit jacks (124); the front end surfaces of the three auxiliary sliding rods (119) are fixedly connected with an operation handle (123).

5. The cable withstand voltage test fixture of claim 4, wherein: the outer walls of the three fixed rotating shafts (117) are fixedly connected with a control gear (125) in the middle; the right end surfaces of the three lifting columns (126) are fixedly connected with a transmission rack (132) in the middle; the three transmission racks (132) are respectively meshed with the three control gears (125); the lower parts of the left end surfaces of the three lifting columns (126) are fixedly connected with a guide sliding block (127); three guide sliding grooves (128) are formed in the mounting seat (116); the three guide sliding blocks (127) are respectively and slidably connected in the three guide sliding grooves (128).

6. The cable withstand voltage test fixture of claim 1, wherein: the top end surfaces of the three lifting columns (126) are fixedly connected with an auxiliary seat (129); a group of clamping seats (130) are connected in alignment rotation in the top end surfaces of the three auxiliary seats (129); the outer sides of the three groups of clamping seats (130) are fixedly connected with a group of supporting springs (131); the tail ends of the three groups of supporting springs (131) are respectively and fixedly connected with the bottom end surfaces of the inner walls of the three auxiliary seats (129).