CN204133534U - Vein clamping hemostasis device - Google Patents

Abstract

This utility model provides a kind of vein to clamp hemostasis device.Described vein clamping hemostasis device comprises the clamping device be connected to form by the clamping plate internal ring opposite side of two arc shapes, it is characterized in that: the clamping part inner surface formed at two curved splints is provided with tampon; The flexible adjustment mechanism be made up of C shape shell fragment and push jack is established in the junction of two curved splints, the handle of each curved splint offers bar shaped installing hole, multiple pressure regulating hole is offered at the outer surface of each curved splint, a balance cushion block is provided with at the outer surface of each curved splint, be embedded in the pressure regulating hole of respective side after the two ends of described C shape shell fragment are each passed through the bar shaped installing hole of handle, the front end of described push jack touches from inserting between two handles in wheel flange that two curved splints are formed with tampon, tail end and C shape clip clamping.This utility model structure is simple, easy to use, and its blood pad, as reusable consumptive material, is easy to installation or removal, uses comfortable.

Description

Vein clamping hemostasis device

Technical field

This utility model relates to medical instruments field, is specifically related to a kind of vein clamping hemostasis device, for the auxiliary hemostasis operation that clinical vein is drawn blood or infused.

Background technology

When carrying out the position venous blood collections such as wrist or intravenous injection at present in hospital clinical, bundle tourniquet method generally can be adopted to stretch tight and to prick the vein of locking wrist, specifically adopt elastic tourniquet to be wrapped in patient to take a blood sample a little or the position on puncture injection point top, its objective is the pressure adding wrist local vascular, blocking returned blood volume around last slightly vein makes by the venous engorgement of pricking of stretching tight, be convenient to medical personnel and carry out venous blood collection or intravenous injection, improve the success rate of puncture.And owing to pricking tourniquet method, to have the material swift to operate use cost that is easy to get low, is used so far as traditional nursing means always.

Elasticity latex dust adhesive tape is used owing to pricking tourniquet, comparatively be difficult to during operation grasp and control, especially the patient of child, obesity or exhaustion, protect soil and identification and location obstacle are existed to the vein of this type of patient, then alternately observation is patted to patient's both hands, or repeat the solution such as way of pricking tourniquet of stretching tight.And when clinical middle bundle tourniquet, excessively stretching tight, to prick be comparatively general phenomenon, stretch tight and prick tension and block while vein and also can hinder tremulous pulse amount of blood supply, and then affect vein blood vessel and fill or make patient produce pain.Thread to be loosened the operation of tourniquet as seen blood back, the strong rebounding of sebific duct produces syringe needle vibrations displacement, causes the puncture procedure failure completed, and makes leakage or is happened occasionally by repeated puncture Shi.In addition, when adopting elastic tourniquet to be wound around, blood sampling or after puncture, a general needs hands helping syringe needle, another hands is loosened tourniquet, and it is also very inconvenient to operate, and adds the working strength of medical personnel.For a long time, quality of medical and nursing is promoted for getting rid of puncture obstacle, in clinical except the professional training of nurse, also summarize the many veins of thread stretch tight prick experiences and skills, mainly contain and prick two tourniquet method, repeatedly prick tourniquet method, adopt flat type tourniquet and tourniquet to alleviate measures such as unclasping, above-mentioned way is effective, but it is comparatively cumbersome obviously to improve the operating process of venous engorgement degree.Also someone works out various hemostatic clamp, clamps wrist by one-handed performance hemostatic clamp, alleviates the working strength of medical personnel.In use still there is following shortcoming in existing hemostatic clamp: 1. existing hemostatic clamp adopts plain clamp to carry out some simply to change mostly, without the function of partial closure's locking, clamping too tightly there will be uncomfortable sensation, and too pine cannot reach desirable haemostatic effect; 2. existing hemostatic clamp all adopts the method for clamping closed up completely, and adaptive surface is narrower is difficult to the tested requirement meeting various wrist footpath or fat or thin patient; 3. existing hemostatic clamp is all a non-removable overall structure, and without the function of isolation skin, reach the requirement of antiseptic hygiene, the comprehensive use cost of overall disinfection hemostatic clamp is very high; 4. existing hemostatic clamp is without balanced support function, and the operation of inclination on desktop clamping overslaugh nurse and observation also reduce the comfort of patient.

Summary of the invention

The purpose of this utility model be according to the deficiencies in the prior art provide a kind of structure simple, easy to operate, time saving and energy saving, use comfortable, have independent sterilizing function, can reusable vein clamping hemostasis device.

That this utility model provides and technical scheme: described a kind of vein clamping hemostasis device comprises the clamping plate of two arc shapes, handle is provided with at the tail end of each arc shape clamping plate, two curved splint internal ring are relative and one end that is close handle is connected to form a clamping device, it is characterized in that: the clamping part inner surface formed at two curved splints is provided with tampon, tampon draw-in groove is offered at the inner surface of each curved splint, the first half of tampon draw-in groove is slightly narrower than latter half, and tampon is fixed and is embedded in tampon draw-in groove by the first half of tampon draw-in groove; Flexible adjustment mechanism is provided with in the junction of two curved splints, described flexible adjustment mechanism is made up of C shape shell fragment and push jack, described C shape shell fragment is arranged between two handles, the front end of described push jack is inserted in the wheel flange of two curved splints formation between two handles, and touch with tampon, the tail end of push jack and C shape shell fragment are placed in the part clamping between two handles.

The further technical scheme of this utility model: described tampon is the oval packing ring that side is provided with opening, length and the shape of the length being opened in the tampon draw-in groove of two curved splint inner surfacies and shape and curved splint are identical, tampon entirety is embedded at two curved splint inner surfacies, its opening towards the bare terminal end of two curved splints, and is respectively equipped with the eversion type flange exposing curved splint bare terminal end at two openings of tampon; Be arranged with supercharging projection at the upper and lower inner surface of tampon, and offer multiple open slot at the inner surface up and down of tampon.

The further technical scheme of this utility model: rotate board slot and swivel plate parallel being provided with of each curved splint connecting portion, after two curved splint internal ring relative combinations, swivel plate correspondence on two curved splints embeds in the rotation board slot on opposing arcuate clamping plate, and can rotate along the rotation board slot of correspondence; Between the rotation board slot and swivel plate of each curved splint, be provided with push jack fixing head, after two curved splint internal ring relative combinations, between the push jack fixing head of two curved splints, form a push jack slot.

This utility model is technical scheme preferably: described C shape shell fragment has two, for the Hookean spring that stainless steel silk is made, on each handle, correspondence offers two bar shaped installing holes, be provided with two row's pressure regulating holes in each curved splint outer surface correspondence, two C shape shell fragments are installed in parallel in bar shaped installing hole and pressure regulating hole.

This utility model is technical scheme preferably: described push jack is T-shaped push jack, and offer in its T-shaped head position with the draw-in groove of C shape clip clamping and be out of shape locking slot, the one end contacted with tampon at T-shaped push jack is provided with pressing plate.

This utility model is technical scheme preferably: also arrange balance cushion block at the outer surface of two curved splints, and the height of balance cushion block and C shape shell fragment tangent line are in the same horizontal line.

This utility model is technical scheme preferably: described tampon adopts soft medical silica-gel to make.

This utility model is technical scheme preferably: described supercharging projection adopts soft medical silica-gel to make, comprise a pair main supercharging projection and at least one pair of additional mechanical supercharging projection composition, wherein main supercharging projection is symmetricly set on tampon central part, and additional mechanical supercharging projection is arranged on the position near tampon opening.

This utility model is technical scheme preferably: the open slot be opened on tampon is symmetricly set on the position near tampon sealed end, and the degree of depth of each open slot is less than 2/3 of tampon thickness.

This utility model is technical scheme preferably: on the handle of each curved splint, offer bar shaped installing hole, multiple pressure regulating hole is offered at the outer surface of each curved splint, be embedded in the pressure regulating hole of respective side after the two ends of described C shape shell fragment are each passed through the bar shaped installing hole of handle, described push jack is T-shaped push jack, the draw-in groove with C shape clip clamping is offered respectively in its both sides, T-shaped head position, distortion locking slot is offered in its T-shaped head position centre, the one end contacted with tampon at T-shaped push jack is provided with pressing plate, the thickness of described pressing plate is greater than the thickness of push jack.

The beneficial effects of the utility model:

(1) clamp of the present utility model is the clamping device be connected to form by flexible adjustment mechanism by two clamping plate, and the front end of flexible adjustment mechanism is clamping part, and rear end forms clamping limb, and realizes holding function under the control of flexible adjustment mechanism;

(2) the retaining part inner surface formed at two clamping plate is embedded with tampon, and tampon adopts high elasticity silica rubber to make, and play the conduction of power and the effect of isolation skin, being clamped in can be pleasant in arm or wrist.The transfusion injection room of hospital has the many operating characteristics of Care cause, the hemostatic clamp of durable type can join the tampon of certain number, utilize tampon can the advantage of efficient fast assembling-disassembling, the consumptive material turnover meeting large discharge reduces use cost, simultaneously for convenience of medical apparatus Disinfectant management, prevent cross infection from providing rational solution;

(3) tampon opening of the present utility model is provided with spoon shape left-hand thread, entering or exiting of wrist is convenient to when opening, removing and installing of tampon can also be convenient to, when closing up, bag wrist of shaking hands forms the closed ellipse inwardly tightened up a compressing circle, wrist oppressive force can be given, and the inwall of tampon is provided with supercharging projection, this projection can get deeply stuck in wrist soft tissue under pressure, vein blood vessel in further extruding wrist, for wrist tissue provides the convenient pressure that partial closure's flexibility tightens up energy block venous blood stream;

(4) flexible adjustment mechanism of the present utility model is made up of C shape elastic ring and push jack, C shape elastic ring bias is settled, two ends is separately fixed in pressure regulating hole that clamp grip shank is offered, when firmly pressing down grip shank, under the effect of C shape elastic ring, control bare terminal end open or close, and discharge to tampon or apply elastic force, can be there is its mid point of deformation in C type spring and axle center forms horizontal displacement at the volley, the length of push jack is just arranged with reference to the distance of displacement, when opening bare terminal end, push rod moves backward with the mid point of spring, when closing up bare terminal end, the mid point of spring moves forward, and drive push rod to apply lateral pressure to tampon, tampon is clamped tightr,

(5) on tampon, offering several open slot, when linking with hemostatic clamp in tampon front end, having the part of open slot to extend thereupon there is deformation, prevent the stressed entirety of tampon from departing from tampon draw-in groove;

This utility model structure is simple, easy to use, and its blood pad is as reusable consumptive material, and be easy to installation or removal, silicon rubber body has good extension elasticity and biological dissolubility, uses comfortable skin to paste the contactless allergic phenomena of skin; Pressure provided by the utility model is constant controlled, obviously can strengthen the fullness degree of vein and the phenomenon of pain or resilience of loosening can not be produced, its clamping of not closing up completely is comparatively loose to the requirement in wrist footpath, for clamping hemostasis operation provides a kind of method of blower operations and broaden application, if it is inadequate in use to feel venous engorgement, also can suitably add at hemostatic clamp back of a bow place the full situation that pressure energy obviously observes blood vessel, and topped each age group transfusion crowd can expand its scope of application etc.; And adopt this device can one-handed performance upper folder fast, Shang the installation and removal, including tampon Clip operation or releasing, whole process is simple only needs the several seconds to complete.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of this utility model tampon;

Fig. 3 is the inner surface structure schematic diagram of this utility model clamping plate;

Fig. 4 is the outer surface structure schematic diagram of this utility model clamping plate;

Fig. 5, Fig. 6 are the structural representations of this utility model push jack;

Fig. 7 is tampon dismounting schematic diagram of the present utility model;

Fig. 8 is using state schematic diagram of the present utility model.

In figure: 1-curved splint, 2-handle, 3-tampon, 4-tampon draw-in groove, 5-C shape shell fragment, 6-push jack, 6-1-draw-in groove, 6-2-distortion locking slot, 6-3-pressing plate, 7-bar shaped installing hole, 8-pressure regulating hole, 9-supercharging projection, 9-1-main supercharging projection, 9-2-additional mechanical supercharging projection, 10-eversion type flange, 11-open slot, 12-rotate board slot, 13-swivel plate, 14-push jack fixing head, 15-push jack slot, 16-wrist, 17-balance cushion block.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.As shown in Figure 1, described a kind of vein clamping hemostasis device, comprise the clamping plate of two arc shapes, handle 2 is provided with at the tail end of each arc shape clamping plate, two curved splint 1 internal ring are relative and one end that is close handle is connected to form a clamping device, front portion, junction is by the clamping part formed of two curved splints 1, the hand grip portion be made up of the handle of two curved splints on rear side of junction, it is characterized in that: as shown in Figure 3, board slot 12 and swivel plate 13 is rotated parallel being provided with of each curved splint 1 connecting portion, after two curved splint 1 internal ring relative combinations, swivel plate 13 correspondence on two curved splints embeds in the rotation board slot 12 on opposing arcuate clamping plate, form a complete clamping components, swivel plate 13 on two curved splints can rotate along the rotation board slot 12 of correspondence respectively, realize the opening and closing of clamping components, be provided with push jack fixing head 14, two curved splint 1 internal ring relative combinations between the rotation board slot 12 and swivel plate 13 of each curved splint 1 after, between the push jack fixing head 14 of two curved splints, form a push jack slot 15.

As shown in Figure 1, the clamping part inner surface formed at two curved splints 1 is provided with tampon 3, as shown in Figure 2, described tampon 3 is provided with the oval packing ring of opening for side, be made up of the silicone rubber of high-elastic flexibility, the tampon that elastic silicone rubber is made, prevent cross infection from isolating the effect of skin except for playing except pressure conduction simultaneously, routine disinfection can be tolerated dispose, meet the specification flow process of " people one is with a sterilization ".As shown in Figure 3, tampon draw-in groove 4 is offered at the inner surface of each curved splint 1, length and the shape of the length being opened in the tampon draw-in groove 4 of two curved splint 1 inner surfacies and shape and curved splint 1 are identical, as shown in Figure 1 and Figure 7, tampon 3 entirety is embedded at two curved splint 1 inner surfacies, its opening is towards the bare terminal end of two curved splints 1, and the eversion type flange 10 exposing curved splint 1 bare terminal end is respectively equipped with at two openings of tampon 3, can easy disassembly tampon, when needing dismounting or install, only with pinching eversion type flange 10, then clamping part is opened, just can fast tampon 3 be taken off, install can pinch equally and turn over formula flange 10, clamping part opens, tampon 3 is placed in clamping part, closed clamping part again, just tampon can be embedded in the tampon draw-in groove 4 of curved splint 1 inner surface.After tampon embeds tampon draw-in groove, to link autonomous folding under the effect of elastic force with hemostatic clamp, be convenient to entering or exit or the removing and installing of tampon of wrist when opening, when closing up, bag wrist of shaking hands forms a closed compressing circle inwardly tightened up.

As shown in Figure 2, supercharging projection 9 is arranged with at tampon about 3 inner surface, described supercharging projection adopts soft medical silica-gel to make, comprise a pair main supercharging projection 9-1 and at least one pair of additional mechanical supercharging projection 9-2 to form, wherein main supercharging projection 9-1 is symmetricly set on tampon 3 central part, additional mechanical supercharging projection 9-2 is arranged on the position near tampon opening, supercharging projection further can compress the vein blood vessel of wrist, for wrist tissue provides the pressure that partial closure's flexibility tightens up energy block venous blood stream; As shown in Figure 2, multiple open slot 11 is offered at the inner surface up and down of tampon 3, the open slot 11 be opened on tampon 3 is symmetricly set on the position near tampon sealed end, the degree of depth of each open slot 11 is less than 2/3 of tampon 3 thickness, the deformation adjustment of tampon can be facilitated, the fat or thin patient in different wrist footpath can be adapted to and use.

As shown in Figure 1, flexible adjustment mechanism is provided with in the junction of two curved splints 1, described flexible adjustment mechanism is made up of C shape shell fragment 5 and push jack 6, described C shape shell fragment 5 has two, adopt the Hookean spring that stainless steel silk is made, as Fig. 3, shown in Fig. 4, on each handle, correspondence offers two bar shaped installing holes 7, two row's pressure regulating holes 8 are provided with in each curved splint 1 outer surface correspondence, two C shape shell fragments 5 are installed in parallel in bar shaped installing hole 7 and pressure regulating hole 8, be embedded in the pressure regulating hole 8 of respective side after the two ends of each C shape shell fragment 5 are each passed through the bar shaped installing hole 7 of handle 2, in use can carry out pressure adjustment by the different pressures adjustment hole 8 regulating C shape shell fragment 5 to embed, as shown in Figure 6, described push jack 6 is T-shaped push jack, offers the draw-in groove 6-1 with the clamping of C shape shell fragment 5 respectively in its both sides, T-shaped head position, offers distortion locking slot 6-2 in its T-shaped head position centre,, the one end contacted with tampon 3 at T-shaped push jack 6 is provided with pressing plate 6-3, as shown in Figure 5, the thickness of described pressing plate 6-3 is greater than the thickness of push jack 6, increases the contact area with tampon, is convenient to promote tampon 3.The front end that described push jack 6 is provided with pressing plate 6-3 is inserted in the wheel flange of two curved splints formation between two handles, and touch with tampon 3, two draw-in groove 6-1 on the tail end T-shaped head of push jack respectively and two C shape shell fragments 5 be placed in the central point clamping of the part between two handles, when curved splint opens, push jack 6 moves backward along with the mid point of C shape shell fragment 5, when curved splint closes up, the mid point of C shape shell fragment 5 moves forward, and drives push rod to apply lateral pressure to tampon.

As shown in Figure 4, the outer surface of two curved splints 1 of the present utility model also arranges balance cushion block 17, in the same horizontal line, this arranges the wrist that patient raised by alternative arteries and veins pillow, for nurse or receptor provide one to stablize comfortable operation fulcrum for the height of balance cushion block 17 and spring tangent line.

The handle of curved splint 1 of the present utility model and clamping plate afterbody is by ABS injection mo(u)lding, utilizes lever principle to simulate the bundle method that stretches tight of latex tubing, forms a kind of aid of low-cost durable type.

When this utility model installs tampon, only need by the handle reinforcing of two curved splints 1, two curved splints 1 to be opened, another hands clamps the eversion type flange 10 of tampon 3 opening, tampon 3 is arranged in the tampon draw-in groove 4 of the inner surface of two curved splints 1, the eversion type flange 10 of left-hand thread termination, then release handle, closes up two curved splints, namely completes clamper and installs with coordinating of tampon.

This utility model dismounting tampon, as shown in Figure 7, clamps the eversion type flange 10 of tampon 3 opening with finger, the afterburning handle end of another hands opens two curved splints 1, and tampon 3 will automatically disengage in draw-in groove, namely complete the dismounting of hemostatic clamp.

When this utility model uses, first tampon is installed, then the handle 2 of afterburning operation two curved splints, the position pricking tourniquet by tradition presss from both sides in wrist proper site, the adjustment of wrist engagement degree is slightly done after settling hemostatic clamp, when namely completing Clip operation Shang folder operation, wrist portion is by the Zhi Xue Clip envelope of ring-type, and the eversion type flange of the termination that the part skin layer that wrist exposes only is padded by blood clamps, hemostatic clamp is made to adopt the mode of operation of not closing up completely, for wrist tissue provides the pressure that partial closure's flexibility tightens up energy block venous blood stream.If sensation fullness degree is inadequate, points the external force extruding a little at hemostatic clamp back of a bow place separately, obviously can strengthen the effect of angioplerosis.After blood back or fixed needle are shown in enforcement puncture, afterburning handle opens hemostatic clamp, is exited by hemostatic clamp from wrist.Pressure provided by the utility model is constant controlled, obviously can strengthen the fullness degree of vein and the phenomenon of pain or resilience of loosening can not be produced, the clamping of in addition, not closing up completely is comparatively loose to the requirement in wrist footpath, for clamping hemostasis operation provides a kind of method of blower operations and broaden application.

This utility model is when Clinical practice, A type (adult's use) or Type B (child's use) two kinds of specifications can be set, the tampon of each configuration two kinds of specifications, depending on being applicable to the crowd of each age group after patient age or wrist footpath and tampon distribution type during use.Use middle slightly slightly cause because of wrist footpath do not close up clamping, do not affect the actual effect of angioplerosis, do not close up clamping be more conducive to chucking power extruding adjustment.

Claims (10)

1. a vein clamping hemostasis device, comprise the clamping plate of two arc shapes, handle (2) is provided with at the tail end of each arc shape clamping plate (1), two curved splints (1) internal ring is relative and one end that is close handle is connected to form a clamping device, it is characterized in that: the clamping part inner surface formed at two curved splints (1) is provided with tampon (3), offer tampon draw-in groove (4) at the inner surface of each curved splint (1), tampon (3) is embedded in tampon draw-in groove (4); Flexible adjustment mechanism is provided with in the junction of two curved splints (1), described flexible adjustment mechanism is made up of C shape shell fragment (5) and push jack (6), described C shape shell fragment (5) is arranged between two handles, the front end of described push jack (6) is inserted in the wheel flange of two curved splints formation between two handles, and touch with tampon (3), the tail end of push jack and C shape shell fragment (5) are placed in the part clamping between two handles.

2. vein clamping hemostasis device according to claim 1, it is characterized in that: described tampon (3) is provided with the oval packing ring of opening for side, length and the shape of the length being opened in the tampon draw-in groove (4) of two curved splints (1) inner surface and shape and curved splint (1) are identical, tampon (3) entirety is embedded at two curved splints (1) inner surface, its opening is towards the bare terminal end of two curved splints (1), and the eversion type flange (10) exposing curved splint (1) bare terminal end is respectively equipped with at two openings of tampon (3), be arranged with supercharging projection (9) at the upper and lower inner surface of tampon (3), and offer multiple open slot (11) at the inner surface up and down of tampon (3).

3. vein clamping hemostasis device according to claim 1 and 2, it is characterized in that: rotate board slot (12) and swivel plate (13) parallel being provided with of each curved splint (1) connecting portion, after two curved splints (1) internal ring relative combinations, swivel plate (13) correspondence on two curved splints embeds in the rotation board slot (12) on opposing arcuate clamping plate, and can rotate along the rotation board slot (12) of correspondence; Push jack fixing head (14) is provided with between the rotation board slot (12) and swivel plate (13) of each curved splint (1), after two curved splints (1) internal ring relative combinations, between the push jack fixing head (14) of two curved splints, form a push jack slot (15).

4. vein clamping hemostasis device according to claim 1 and 2, it is characterized in that: on the handle (2) of each curved splint, offer bar shaped installing hole (7), offer multiple pressure regulating hole (8) at the outer surface of each curved splint (1), be embedded in the pressure regulating hole (8) of respective side after the two ends of described C shape shell fragment (5) are each passed through the bar shaped installing hole (7) of handle (2).

5. vein clamping hemostasis device according to claim 1 and 2, it is characterized in that: described push jack (6) is T-shaped push jack, offer in its T-shaped head position with the draw-in groove (6-1) of C shape shell fragment (5) clamping and be out of shape locking slot (6-2), the one end contacted with tampon (3) at T-shaped push jack (6) is provided with pressing plate (6-3).

6. vein clamping hemostasis device according to claim 1 and 2, it is characterized in that: also arrange balance cushion block (17) at the outer surface of two curved splints (1), the height of balance cushion block (17) and C shape shell fragment (5) tangent line are in the same horizontal line.

7. vein clamping hemostasis device according to claim 1 and 2, is characterized in that: described tampon (3) adopts soft medical silica-gel to make.

8. vein clamping hemostasis device according to claim 2, it is characterized in that: described supercharging projection adopts soft medical silica-gel to make, comprise a pair main supercharging projection (9-1) and at least one pair of additional mechanical supercharging projection (9-2) composition, wherein main supercharging projection (9-1) is symmetricly set on tampon (3) central part, and additional mechanical supercharging projection (9-2) is arranged on the position near tampon opening.

9. vein clamping hemostasis device according to claim 2, it is characterized in that: the open slot (11) be opened on tampon (3) is symmetricly set on the position near tampon sealed end, and the degree of depth of each open slot (11) is less than 2/3 of tampon (3) thickness.

10. vein clamping hemostasis device according to claim 4, it is characterized in that: described C shape shell fragment (5) has two, for the Hookean spring that stainless steel silk is made, on each handle, correspondence offers two bar shaped installing holes (7), be provided with two row's pressure regulating holes (8) in each curved splint (1) outer surface correspondence, two C shape shell fragments (5) are installed in parallel in bar shaped installing hole (7) and pressure regulating hole (8); Described push jack (6) is T-shaped push jack, the draw-in groove (6-1) with C shape shell fragment (5) clamping is offered respectively in its both sides, T-shaped head position, distortion locking slot (6-2) is offered in its T-shaped head position centre, the one end contacted with tampon (3) at T-shaped push jack (6) is provided with pressing plate (6-3), and the thickness of described pressing plate (6-3) is greater than the thickness of push jack (6).