CN215658990U

CN215658990U - Nonrust steel pipe cutting auxiliary device

Info

Publication number: CN215658990U
Application number: CN202121419909.2U
Authority: CN
Inventors: 姚强
Original assignee: Weishan Sanlite Stainless Steel Co ltd
Current assignee: Weishan Sanlite Stainless Steel Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-01-28
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a stainless steel tube cutting auxiliary device, which comprises an operating platform, wherein cutting equipment is arranged on one side above the operating platform, a supporting mechanism is arranged on the side edge of the operating platform far away from the cutting equipment, a vibration force counteracting mechanism is arranged in the middle above the operating platform, the supporting mechanism comprises an auxiliary supporting part and a limiting part, the auxiliary supporting part comprises an auxiliary supporting plate, a sliding channel and a sliding seat, the auxiliary supporting plate and the operating platform are in the same horizontal shape, the placing area of the operating platform is enlarged by steering adjustment of the auxiliary supporting plate in the supporting mechanism through the supporting mechanism and the vibration force counteracting mechanism, an auxiliary supporting effect is provided for continuous conveying of a tube, when the tube is placed on the operating platform, the position of a supporting plate in the vibration force counteracting mechanism can be adjusted according to the size of the tube so as to enable the supporting plate to drive a buffer contact plate to be attached to the surface of the tube, the buffering contact plate can absorb the vibration force applied when the pipe is cut, and the vibration force of the pipe is buffered.

Description

Nonrust steel pipe cutting auxiliary device

Technical Field

The utility model relates to the technical field of stainless steel pipe cutting, in particular to an auxiliary device for stainless steel pipe cutting.

Background

Stainless steel pipe is a hollow rectangular circular steel, and mainly widely used for industrial conveying pipelines such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instruments and mechanical structure parts, in addition, when bending, torsional strength are the same, and weight is lighter, so also widely used for making machine part and engineering structure, current when using cutting equipment to cut off nonrust steel pipe, often need artifical manual propulsion tubular product to make tubular product constantly carry to cutting equipment cutter below, traditional operation is too loaded down with trivial details.

Among the prior art, patent grant publication No. CN 212121862U's patent has announced a technical scheme, and this patent is through setting up horizontal slip's manual direction conveyor, through handle drive the clutch blocks with the cooperation centre gripping of guiding hole can assist the transport of nonrust steel pipe, improves the stability that nonrust steel pipe cutting was carried, and need not operating personnel manual removal nonrust steel pipe, has reduced the intensity of labour of nonrust steel pipe cutting, through the guiding hole with the cooperation of guiding pipe can prevent that nonrust steel pipe from droing in cutting and transportation, improves the security of nonrust steel pipe cutting.

Though the manual direction conveyor of accessible of above-mentioned patent, in order to improve the stability that nonrust steel pipe cutting was carried, need not the nonrust steel pipe of operating personnel manual movement, but this technical scheme is when carrying out manual direction transport to longer tubular product, longer tubular product has that more parts can't place on the cutting bed, can take place serious upwarp phenomenon when carrying because of the action of gravity tubular product, it is troublesome to bring unnecessary for actual operation, need extra manpower to hold up tubular product for a long time, in order to guarantee the tubular product level, the operation is too numerous and diverse, and cutting equipment is when cutting off tubular product, tubular product can produce comparatively strong vibrations, lead to the cutting inequality of tubular product easily, influence tubular product cutting quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an auxiliary device for cutting a stainless steel pipe, and the auxiliary device solves the problems that when the conventional device is used for manually guiding and conveying a longer pipe, more parts of the longer pipe cannot be placed on a cutting table, the pipe can seriously upwarp due to the action of gravity during conveying, unnecessary troubles are brought to actual operation, extra manpower is needed for supporting the pipe for a long time to ensure the level of the pipe, the operation is excessively complicated, and the pipe can generate stronger vibration when cutting equipment cuts the pipe, so that the pipe is easily cut unevenly, and the cutting quality of the pipe is influenced.

In order to solve the technical problems, the utility model specifically provides the following technical scheme:

the utility model provides a stainless steel pipe cutting auxiliary device which comprises an operating platform, wherein cutting equipment for cutting off a pipe is arranged on one side above the operating platform, a supporting mechanism for providing an auxiliary supporting effect for pipe conveying is arranged on the side edge, far away from the cutting equipment, of the operating platform, and a vibration force counteracting mechanism for counteracting vibration force generated when the pipe is cut off is arranged in the middle above the operating platform;

the supporting and jacking mechanism comprises an auxiliary supporting component and a limiting component, wherein the auxiliary supporting component is used for providing upward auxiliary supporting force for the conveying of the pipe, and the limiting component is used for providing a stable fixing effect for the auxiliary supporting component;

the auxiliary supporting part comprises an auxiliary supporting plate hinged to the side edge of the operating platform, a sliding channel arranged on the side edge of the operating platform and a sliding seat arranged in the sliding channel in a sliding mode, the auxiliary supporting plate and the operating platform are in the same horizontal shape, the bottom end of the auxiliary supporting plate is hinged to an auxiliary supporting rod, the tail end of the auxiliary supporting rod extends into the sliding channel and is hinged to the sliding seat, a recovery spring connected with the sliding seat is arranged on the inner wall of the sliding channel, a rail limiting sliding block is arranged at the bottom end of the sliding seat, and a rail limiting sliding groove matched with the rail limiting sliding block is arranged on the inner wall of the sliding channel.

As the preferable scheme of the auxiliary device for cutting the stainless steel tube, the limiting component comprises a clamping groove arranged at the bottom end of the rail limiting sliding block and a clamping block vertically and movably arranged in the clamping groove, a moving groove is formed in the inner wall of the bottom end of the rail limiting sliding groove, the bottom end of the clamping block penetrates through the clamping groove and extends into the moving groove, a bearing block is arranged on the side edge of the moving groove, a bearing sliding groove matched with the bearing block is formed in the inner wall of one side of the moving groove, and a return spring connected with the bearing block is arranged on the inner wall of the bearing sliding groove.

As a preferred scheme of the auxiliary device for cutting the stainless steel tube, a trapezoidal force application block is arranged on one side of the fixture block and located in the motion groove, a force supply screw is connected to one side, away from the fixture block, of the trapezoidal force application block through an embedded bearing, one end, away from the trapezoidal force application block, of the force supply screw transversely penetrates through the motion groove and extends to a position right below the auxiliary supporting plate, and when the force supply screw is screwed, the trapezoidal force application block abuts against the fixture block.

As a preferred embodiment of the stainless steel tube cutting assisting device of the present invention, the vibration force counteracting mechanism includes a buffer member for performing fitting type shock absorption on the tube, a space enlarging member for longitudinally adjusting the buffer member according to the size of the tube, and a fixing member for providing a positioning effect for the buffer member;

the buffering part comprises a plurality of supporting plates and a buffering contact plate, the supporting plates are arranged above the operating table, the buffering contact plate is arranged under the supporting plates, one end, close to the supporting plates, of the buffering contact plate is provided with a plurality of shrinkage blocks, the bottom end of the supporting plates is provided with a plurality of shrinkage grooves used for the shrinkage blocks to slide, and one end, far away from the buffering contact plate, of the buffering contact plate is provided with a buffering spring connected with the inner wall of the buffering contact plate.

As a preferable scheme of the auxiliary device for cutting a stainless steel tube of the present invention, the space enlarging component includes two adjusting rods symmetrically disposed at both sides of the bottom end of the supporting plate and a contracting channel disposed on the top surface of the operating platform for sliding of the adjusting rods.

As a preferable scheme of the stainless steel pipe cutting auxiliary device, the fixing part comprises a plurality of adjusting cavities arranged in the operating platform, reverse screws transversely arranged on the inner wall of one side of each adjusting cavity and screw sleeves connected to the surfaces of the reverse screws through threads, moving grooves communicated with the contracting channels are formed in the inner walls of the adjusting cavities, one ends of the reverse screws penetrate through the adjusting cavities, extend to the outer side of the operating platform and are connected with crank handles, clamping rods are arranged at the top ends of the screw sleeves, and rubber plates connected with the clamping rods are arranged in the moving grooves in a sliding mode.

Compared with the prior art, the utility model has the following beneficial effects:

the auxiliary supporting plate in the supporting mechanism is adjusted in a steering mode through the supporting mechanism and the vibration force counteracting mechanism, so that the auxiliary supporting plate and the operating platform are in the same horizontal plane, the placing area of the operating platform is enlarged, an auxiliary supporting effect is provided for continuous conveying of the pipe, when the pipe is placed on the operating platform, the position of the supporting plate in the vibration force counteracting mechanism can be adjusted according to the size of the pipe, the supporting plate drives the buffering contact plate to be attached to the surface of the pipe, the buffering contact plate can absorb the vibration force applied when the pipe is cut, the vibration force of the pipe is buffered, and the cutting quality of the pipe is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the propping mechanism of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 at A according to the present invention;

FIG. 4 is a schematic structural diagram of a vibration force counteracting mechanism according to the present invention;

FIG. 5 is a schematic diagram of the structure of FIG. 4 at B according to the present invention.

The reference numerals in the drawings denote the following, respectively:

1. an operation table; 2. cutting equipment; 3. a jacking mechanism; 4. a vibration force counteracting mechanism;

31. an auxiliary support member; 32. a defining component;

310. an auxiliary supporting plate; 311. a slipping channel; 312. a sliding seat; 313. supporting the supporting rod in an auxiliary supporting way; 314. recovering the spring; 315. a rail limiting slide block; 316. a rail-limiting sliding chute;

320. a card slot; 321. a clamping block; 322. a slide bearing block; 323. a bearing chute; 324. a return spring; 325. a motion groove; 326. a force-supplying screw; 327. a trapezoidal force application block;

41. a buffer member; 42. a space enlarging member; 43. a fixing member;

410. a support plate; 411. a buffer contact plate; 412. a contraction block; 413. a contraction groove; 414. a buffer spring;

420. a constricting channel; 421. adjusting a rod;

430. an adjustment chamber; 431. a reverse screw; 432. a threaded sleeve; 433. a clamping bar; 434. a rubber plate; 435. a crank; 436. a moving groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the utility model provides a stainless steel tube cutting auxiliary device, which comprises an operation table 1, wherein a cutting device 2 for cutting off a tube is arranged on one side above the operation table 1, and a supporting mechanism 3 for providing an auxiliary supporting effect when the tube is conveyed is arranged on the side of the operation table 1 far away from the cutting device 2.

Through propping a mechanism 3, can increase the face that can place of operation panel 1 to tubular product effectively to for continuously carrying of tubular product provides the auxiliary stay effect, make longer tubular product can keep the horizontality to carry, avoid because of the action of gravity, lead to taking place to upwarp, influence tubular product and cut off the effect.

Specifically, as shown in fig. 1 and fig. 2, in this embodiment, the supporting mechanism 3 includes an auxiliary supporting member 31 for providing an upward auxiliary supporting force for conveying the pipe, the auxiliary supporting member 31 includes an auxiliary supporting plate 310 hinged to a side of the operating platform 1, a sliding channel 311 disposed at a side of the operating platform 1, and a sliding seat 312 slidably disposed in the sliding channel 311, the auxiliary supporting plate 310 and the operating platform 1 are in the same horizontal shape, a bottom end of the auxiliary supporting plate 310 is hinged to an auxiliary supporting rod 313, a tail end of the auxiliary supporting rod 313 extends into the sliding channel 311 and is hinged to the sliding seat 312, a retraction spring 314 connected to the sliding seat 312 is disposed on an inner wall of the sliding channel 311, a rail-limiting sliding block 315 is disposed at a bottom end of the sliding seat 312, and a rail-limiting sliding chute 316 matched with the rail-limiting sliding block 315 is disposed on an inner wall of the sliding channel 311.

When longer tubular product is carried on operation panel 1, can at first stimulate auxiliary supporting plate 310, make auxiliary supporting plate 310 atress do the rotation state at operation panel 1 lateral part, and simultaneously, pull slide seat 312 through assisting support branch 313 and make the slip in the passageway 311 that slides, adjust to be horizontal same horizontal state with operation panel 1 until auxiliary supporting plate 310, assist support branch 313, auxiliary supporting plate 310 and the side of operation panel 1 can constitute the triangle-shaped, provide invariable support effect for auxiliary supporting plate 310, auxiliary supporting plate 310 can be effectual enlarges the tubular product face that can place of operation panel 1, provide supplementary support effect when carrying for tubular product.

Meanwhile, as shown in fig. 2 and fig. 3, the supporting mechanism 3 of the present embodiment further includes a limiting member 32 for providing a stable fixing effect for the auxiliary supporting member 31, the limiting member 32 includes a locking groove 320 disposed at the bottom end of the rail-limiting sliding block 315 and a locking block 321 vertically movably disposed in the locking groove 320, a moving groove 325 is disposed on an inner wall of the bottom end of the rail-limiting sliding groove 316, the bottom end of the locking block 321 passes through the locking groove 320 and extends into the moving groove 325, a sliding block 322 is disposed at a side edge of the moving groove 325, a sliding receiving groove 323 matched with the sliding block 322 is disposed on an inner wall of one side of the moving groove 325, a return spring 324 connected to the sliding block 322 is disposed on an inner wall of the sliding receiving groove 323, a trapezoidal force applying block 327 disposed in the moving groove 325 is disposed on one side of the locking block 321, a force applying screw 326 is connected to one side of the trapezoidal force applying block 327 away from the locking block 321 through an embedded bearing, one end of the force applying screw 326 away from the trapezoidal force applying block 327 transversely passes through the moving groove 325 and extends to a position under the auxiliary supporting plate 310, when the power supply screw 326 is screwed, the trapezoidal force application block 327 abuts against the stopper 321.

After the auxiliary supporting plate 310 is pulled to be in the same horizontal shape as the operating table 1, the force supply screw 326 is screwed, so that the force supply screw 326 is stressed to drive the trapezoidal force application block 327 to slide in the movement groove 325 until the trapezoidal force application block 327 abuts against the fixture block 321, the fixture block 321 is stressed to move upwards in the movement groove 325 until the fixture block 321 penetrates through the movement groove 325 and extends into the clamping groove 320, the rail limiting sliding block 315 is effectively fixed, and the supporting effect of the auxiliary supporting plate 310 can be kept constant in the same way.

When the fixture block 321 moves in the moving groove 325, the fixture block 321 drives the slide-bearing block 322 to move in the same direction in the slide-bearing groove 323, and when the slide-bearing block 322 slides in the slide-bearing block 322, the return spring 324 is pulled to deform the return spring 324, and when the power screw 326 is screwed in the reverse direction to make the trapezoidal force-applying block 327 no longer abut against the fixture block 321, the resilience of the return spring 324 can rapidly drive the fixture block 321 to contract towards the inside of the moving groove 325, so as to release the fixing effect on the rail-limiting slide block 315 in time.

Above-mentioned embodiment, though through increasing the face of can placing of operation panel 1 to tubular product to when lasting the longer tubular product of carrying, for tubular product provides the supplementary support effect steadily, but cutting equipment is when cutting off tubular product, and tubular product can produce comparatively strong vibrations, leads to the cutting inequality of tubular product easily, influences the tubular product and cuts off the quality.

In order to solve the above problem, as shown in fig. 1 and 4, a vibration force canceling mechanism 4 for canceling a vibration force generated when the pipe is cut is provided in the middle above the table 1 in the present embodiment.

Through the vibration force counteracting mechanism 4, the vibration force applied during the cutting of the pipe can be effectively absorbed, and the vibration force of the pipe is buffered.

Specifically, as shown in fig. 4 and 5, the vibration force counteracting mechanism 4 in this embodiment includes a buffer member 41 for attaching a tube for shock absorption and a space expanding member 42 for longitudinally adjusting the buffer member 41 according to the size of the tube, the buffer member 41 includes a plurality of support plates 410 disposed above the operation table 1 and a buffer contact plate 411 disposed right below the support plates 410, one end of the buffer contact plate 411 close to the support plates 410 is provided with a plurality of shrinkage blocks 412, the bottom end of the support plates 410 is provided with a plurality of shrinkage grooves 413 for the shrinkage blocks 412 to slide, one end of the shrinkage blocks 412 far away from the buffer contact plate 411 is provided with a buffer spring 414 connected to the inner wall of the buffer contact plate 411, the space enlarging unit 42 includes two adjusting rods 421 symmetrically disposed at both sides of the bottom end of the supporting plate 410 and a contracting channel 420 disposed at the top surface of the operating table 1 for sliding the adjusting rods 421.

When the pipe is conveyed above the operation table 1, the supporting plate 410 can be quickly pulled according to the size of the conveyed pipe, the supporting plate 410 is stressed to drive the adjusting rod 421 to slide outwards in the contraction channel 420, so as to increase the space between the supporting plate 410 and the upper surface of the operation table 1, until the space between the supporting plate 410 and the operation table 1 is adjusted to the position corresponding to the size of the pipe, the pipe can be placed below the supporting plate 410, the buffering contact plate 411 is attached to the surface of the pipe, the buffering contact plate 411 can sense the vibration force of the pipe when the pipe is cut, the contraction block 412 is driven to contract inside the contraction groove 413, the buffering spring 414 is squeezed, the buffering spring 414 is deformed, and the vibration force of the pipe is buffered.

Meanwhile, as shown in fig. 4, the vibration force counteracting mechanism 4 of the present embodiment further includes a fixing member 43 for providing a positioning effect for the buffering member 41, the fixing member 43 includes a plurality of adjusting cavities 430 disposed in the console 1, a reverse screw 431 transversely disposed on an inner wall of one side of the adjusting cavities 430, and a screw sleeve 432 threadedly connected to a surface of the reverse screw 431, a moving groove 436 communicating with the contracting channel 420 is formed on an inner wall of the adjusting cavities 430, one end of the reverse screw 431 passes through the adjusting cavities 430 and extends to an outer side of the console 1 and is connected with a crank 435, a clamping bar 433 is disposed at a top end of the screw sleeve 432, and a rubber plate 434 connected with the clamping bar 433 is slidably disposed inside the moving groove 436.

After the supporting plate 410 is pulled to complete the adjustment of the distance between the supporting plate 410 and the operating platform 1, the reverse screw 431 is rotated in the adjusting cavity 430 by screwing 435, the screw sleeve 432 is moved away from the surface of the reverse screw 431 by the screw sleeve 432 matched with the thread structure formed on the reverse screw 431, and is driven 434 by the clamping rod 433 to extend from 436 to the inside of the contraction channel 420 until 434 is in contact with the adjusting

rod

421, and 434 can effectively fix the adjusting rod 421 and keep the adjusted position of the supporting plate 410 constant.

In summary, in the present embodiment, when the auxiliary supporting member 31 is used, the surface on which the pipe of the operation table 1 can be placed can be effectively enlarged, so as to provide an auxiliary supporting effect when the pipe is conveyed, the auxiliary supporting member 31 can be effectively fixed by the limiting member 32, the supporting effect of the auxiliary supporting member 31 can be maintained, the buffering member 41 can sense the vibration force of the pipe when the pipe is cut, so as to buffer the vibration force of the pipe, the space between the supporting plate 410 and the upper surface of the operation table 1 can be enlarged by the space enlarging member 42 according to the size of the conveyed pipe, so as to facilitate the placement of the pipe under the supporting plate 410, and the position state of the supporting plate 410 after adjustment can be maintained by the fixing member 43.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims

1. The utility model provides a nonrust steel pipe cutting auxiliary device which characterized in that: the pipe cutting machine comprises an operating table (1), wherein a cutting device (2) used for cutting off a pipe is arranged on one side above the operating table (1), a supporting and jacking mechanism (3) used for providing an auxiliary supporting effect for conveying the pipe is arranged on the side edge, far away from the cutting device (2), of the operating table (1), and a vibration force counteracting mechanism (4) used for counteracting vibration force generated when the pipe is cut off is arranged in the middle above the operating table (1);

the supporting and jacking mechanism (3) comprises an auxiliary supporting part (31) for providing upward auxiliary supporting force for conveying the pipes and a limiting part (32) for providing stable fixing effect for the auxiliary supporting part (31);

the auxiliary support component (31) comprises an auxiliary support plate (310) hinged to the side edge of the operating platform (1), a sliding channel (311) arranged on the side edge of the operating platform (1) and a sliding seat (312) arranged in the sliding channel (311) in a sliding manner, the auxiliary supporting plate (310) and the operating platform (1) are in the same horizontal shape, the bottom end of the auxiliary supporting plate (310) is hinged with an auxiliary supporting rod (313), the tail end of the auxiliary supporting rod (313) extends into the sliding channel (311) and is hinged with the sliding seat (312), a retraction spring (314) connected with the sliding seat (312) is arranged on the inner wall of the sliding channel (311), the bottom of the sliding seat (312) is provided with a track limiting sliding block (315), and the inner wall of the sliding channel (311) is provided with a track limiting sliding groove (316) matched with the track limiting sliding block (315).

2. The stainless steel pipe cutting auxiliary device of claim 1, wherein: the limiting component (32) comprises a clamping groove (320) arranged at the bottom end of the rail limiting sliding block (315) and a clamping block (321) vertically movably arranged in the clamping groove (320), a moving groove (325) is formed in the inner wall of the bottom end of the rail limiting sliding groove (316), the bottom end of the clamping block (321) penetrates through the clamping groove (320) and extends into the moving groove (325), a bearing block (322) is arranged on the side edge of the moving groove (325), a sliding bearing groove (323) matched with the bearing block (322) is formed in the inner wall of one side of the moving groove (325), and a return spring (324) connected with the bearing block (322) is arranged on the inner wall of the sliding bearing groove (323).

3. The stainless steel pipe cutting auxiliary device of claim 2, wherein: one side of the fixture block (321) is provided with a trapezoidal force application block (327) positioned in the motion groove (325), one side, far away from the fixture block (321), of the trapezoidal force application block (327) is connected with a force supply screw (326) through an embedded bearing, one end, far away from the trapezoidal force application block (327), of the force supply screw (326) transversely penetrates through the motion groove (325) and extends to the position under the auxiliary supporting plate (310), and when the force supply screw (326) is screwed, the trapezoidal force application block (327) is abutted to the fixture block (321).

4. The stainless steel pipe cutting auxiliary device of claim 1, wherein: the vibration force counteracting mechanism (4) comprises a buffering component (41) for attaching type shock absorption on a pipe, a space expanding component (42) for longitudinally adjusting the buffering component (41) according to the size of the pipe, and a fixing component (43) for providing a positioning effect for the buffering component (41);

buffer unit (41) include a plurality of set up in backup pad (410) of operation panel (1) top with set up in buffer contact board (411) under backup pad (410), buffer contact board (411) are close to the one end of backup pad (410) is provided with a plurality of shrink piece (412), a plurality of has been seted up to the bottom of backup pad (410) and has been used for shrink groove (413) that shrink piece (412) slided, shrink piece (412) are kept away from the one end of buffer contact board (411) be provided with buffer spring (414) that buffer contact board (411) inner wall links to each other.

5. The stainless steel pipe cutting auxiliary device of claim 4, wherein: the space expansion component (42) comprises two adjusting rods (421) symmetrically arranged at two sides of the bottom end of the supporting plate (410) and a contraction channel (420) arranged on the top surface of the operating platform (1) and used for the sliding of the adjusting rods (421).

6. The stainless steel pipe cutting auxiliary device of claim 5, wherein: fixed part (43) include a plurality of set up in adjust chamber (430) in operation panel (1), transversely set up in adjust reverse screw rod (431) on chamber (430) one side inner wall and through threaded connection in swivel nut (432) on reverse screw rod (431) surface, set up on the inner wall of adjusting chamber (430) with motion groove (436) that communicate in shrink passageway (420), the one end of reverse screw rod (431) is passed adjust chamber (430) and extend to the outside of operation panel (1) and be connected with crank (435), the top of swivel nut (432) is provided with clamping bar (433), the inside slip of motion groove (436) be provided with rubber slab (434) that clamping bar (433) link to each other.