CN108844422A - A kind of ammunition packing structure - Google Patents

Abstract

The invention discloses a kind of ammunition packing structures, the ammunition packing structure includes pedestal, cylinder and cover, pedestal, cover are respectively arranged at cylinder both ends, pedestal and cylinder screw are tightly connected, cover is fixedly connected with cylinder by anchor ear, the junction of cover and cylinder is provided with sealing ring, and pedestal, cylinder and cover form sealing space；The first bolster, bullet point protective case and the second bolster are provided in sealing space, side and the base inner wall of the first bolster recline, and the other side of the first bolster and one end of bullet point protective case recline, and bullet point protective case has and the matched accommodating chamber of ammunition bullet；The side of second bolster reclines with ammunition projectile tail, and the other side and the cover inner wall of the second bolster recline.The present invention have ammunition dress take conveniently, it is time saving and energy saving, applied widely outstanding advantages of, can complete protect while completion to the protection of single bullet or by supporting structure to mostly bullet by a packaging, in order to individual soldier's portable.

Description

A kind of ammunition packing structure

Technical field

The present invention relates to ammunition transport and storing technology fields, specifically for, the present invention be a kind of ammunition packing knot Structure.

Background technique

Ammunition is the core of weapon system, is emitted by weapon or delivery vehicle to target area, injures mesh to realize Other tasks are marked or complete, before ammunition transmitting, the transport and preservation of ammunition are just particularly important.Traditional ammunition packing side Formula is：Antistatic process is carried out to bullet first, then ammunition is placed in the glass fibre reinforced plastic cylinder or iron sheet tube or plastic barrel of sealing, Finally the packing tube equipped with ammunition is put into packing case, and is fixed repeatedly, to complete the packaging to ammunition.Although existing There is technology to can be realized the packaging to ammunition, but still there are following technical problems.

(1) ammunition in hand packaging structure is more complex, operating procedure is more, brings many troubles to user, necessarily causes The problems such as ammunition packing is cumbersome, complicated, time-consuming, at high cost.

(2) be not suitable for individual soldier's portable, although existing munition container can pass through vehicle transport, actually many fields It closes and individual soldier is needed to carry what cartridge bag fitted tube moved ahead, the prior art only allows individual soldier to carry a packing tube advance, it is difficult to meet Scene needs.

(3) when carrying out air-tightness and bearing capacity detection to packing tube, it is necessary to packing tube are placed in large sealing and held In device, the air-tightness and bearing capacity of inspection packing tube (such as glass fibre reinforced plastic cylinder) after pumping Negative pressure, above-mentioned detection are carried out to container Method can only detect packing tube in fixed location, there are flexibilities it is poor, cost consumption is higher the problems such as.

Therefore, how preferably to optimize ammunition packing structure, to make ammunition packing structure convenient for individual soldier's portable and be convenient for Air-tightness and bearing capacity detection are carried out, has become those skilled in the art's technical problem urgently to be resolved and studies always Emphasis.

Summary of the invention

For solve ammunition in hand packaging structure exist structure is complicated, packaging it is cumbersome, take a long time, higher cost the problems such as, Present invention innovation provides a kind of ammunition packing structure, not only Traditional Packing cylinder is optimized in structure, to reduce Cost, and the ammunition packing structure provided have convenient for operation, packaging process is time-consuming short outstanding advantages of, and after packaging Ammunition is suitable for individual soldier's portable, so the present invention can preferably solve problems of the existing technology.

To realize the above-mentioned technical purpose, the invention discloses a kind of ammunition packing structures, which includes bottom Seat, cylinder and cover, the pedestal, the cover are respectively arranged at the cylinder both ends, the pedestal and the cylinder screw It is tightly connected, the cover is fixedly connected with the cylinder by anchor ear, and the junction of the cover and the cylinder is provided with Sealing ring, the pedestal, the cylinder and the cover form sealing space；The first buffering is provided in the sealing space Part, bullet point protective case and the second bolster, side and the base inner wall of the first bolster recline, the other side of the first bolster with One end of bullet point protective case reclines, and the bullet point protective case has and the matched accommodating chamber of ammunition bullet；The one of second bolster Side reclines with ammunition projectile tail, and the other side and the cover inner wall of the second bolster recline.

Based on above-mentioned technical solution, the present invention not only has that structure is simple, handling are easy, time-consuming short, at low cost etc. excellent Point, and the cartridge bag fitted tube overall weight is lighter, meets the requirement of individual soldier's portable, more suitable for battlefield surroundings complicated and changeable. Use scope of the present invention is wider, for identical bore or less than other class ammunitions of the bore, it is only necessary to change bolster and bullet The protection to ammunition can be completed in sharp protective case；If other class ammunition length are longer or the ammunition improve after length increase, only need Lengthening change is carried out to cylinder bottom；So the present invention is suitable for generic ammunition and protects packet in the case where changing lesser situation Dress.

Further, which further includes first support and second support, and the first support has first Half slot and the second half slot, the second support have third half slot and the 4th half slot, described first be oppositely arranged Half slot and the third half slot form the first through hole fixed for a cylinder, second half slot being oppositely arranged Second through-hole fixed for another cylinder is formed with the 4th half slot；The first support and the second support are logical Lock is crossed to be fixedly connected.

Based on above-mentioned improved technical solution, by the supporting structure of ingehious design, the present invention is able to achieve to two cylinders Whole assembly is carried out, consequently facilitating individual soldier's portable bitubular, meets the actual demand at scene.

Further, the first support and the second support form bundle component, two bundle components symmetrically cloth It is placed in cylinder front and rear sides.

Based on above-mentioned improved technical solution, present invention employs the modes that the front and rear sides bracket of cylinder is fixed, realize The rear and front end of two packing tubes is symmetrically fixed, to fix two packing tubes, securely in order to individual soldier's portable.

Further, the first support is set to the top of second support, and the upper surface of first support extends upward Boss, the lower surface of second support are provided with groove, and the groove and the boss match setting：Groove for boss insertion, Boss is for being inserted into groove.

Based on above-mentioned improved technical solution, the present invention can be realized bracket pile function：It realizes to multiple cylinders (ratio Such as four, six, eight packing tubes) unified assembly is carried out, so that easily multiple packing tubes are carried out while being transported, thus Realization quickly and easily transports ammunition, and meets actual demand.

Further, it is connected by the boss with the groove between two neighbouring bundle components, the ammunition Packaging structure includes multiple bundle components.

Based on above-mentioned improved technical solution, the present invention can realize the same of multiple packing tubes by way of upper and lower pile When transport, advance for example, individual soldier carries multiple cartridge bags, to adapt to field demand complicated and changeable.

Further, there is a ring muscle cylinder body outer wall surface is circumferentially arranged, the ring muscle has vertical with cylinder body outer wall Side wall；The first support and the second support are both secured between two ring muscle, two sides of first support and/or Two sides of two brackets lean with the side wall of two ring muscle simultaneously.

Based on above-mentioned improved technical solution, the present invention can be avoided the problem of bracket slides in the axial direction, so that It is more reliably fixed between bracket and cylinder, guarantees that transport is steady and safe, be convenient for individual soldier's portable.

Further, locating piece, the first support and/or described are further extended outward out on the cylinder body outer wall surface The locating slot for locating piece insertion is provided on two brackets.

Based on above-mentioned improved technical solution, by the set-up mode of positioning block structure, the present invention can be further ensured that The fixed fixing of bracket, guarantees being reliably fixed between bracket and cylinder.

Further, which further includes carrying handle, and the carrying handle is in U-shape and including a grip part and place Two sliding parts in the grip part two sides；The cover extends outward two tubular lobes disposed in parallel, the cunning Dynamic portion is inserted into the tubular lobes, and the sliding part is slidably connected with the tubular lobes；The end of sliding part is fixed with Locating part, the outer diameter of locating part are greater than the internal diameter of tubular lobes.

Based on above-mentioned improved technical solution, when carrying out taking bullet, the present invention can pass through carrying handle quickly and efficiently pull-up Cover, and withdrawn when not needing carrying handle by tubular lobes, so the present invention has easy to use, user experience is good etc. Outstanding advantages.

Further, it is provided with detection hole on the cover, sealing plug is installed in the detection hole.

Based on above-mentioned improved technical solution, the present invention can conveniently and efficiently detect the air-tightness of cartridge bag fitted tube and hold Pressure energy power need to only unload sealing plug when detecting, and formula sealing test instrument easy to use can be detected, and only need a people Detection is completed, and can be detected whenever and wherever possible, it is unconditional to limit.

Further, the cylinder one end connecting with the cover is circumferentially arranged an epitaxy part, the epitaxy part with it is described Annular groove is formed between cylinder；The sealing ring has integrally formed insertion part and interconnecting piece, and the insertion part is embedded in institute It states in annular groove, the interconnecting piece includes first step portion and second step portion, the first step portion and the second step Portion all has top surface and side, and the top surface in first step portion is connected and is vertically arranged with the side in second step portion, second step Side and the end face of cover recline, the top surface of first step and the medial surface of cover recline.

Based on above-mentioned improved technical solution, the present invention is same by sealing between sealing ring completion cylinder and cover When, moreover it is possible to it avoids the problem that sealing ring is scraped, collided with and drenched with rain, to be effectively protected sealing ring, and is greatly improved The sealing performance of cover.

Beneficial effects of the present invention are：Compared with prior art, the present invention has that ammunition packing structure is simple, ammunition dress takes Outstanding advantages of convenient, time saving and energy saving, applied widely, and the protection to single bullet can be completed by a packaging or passed through Supporting structure protects more while completion to play, in order to individual soldier's portable.

Detailed description of the invention

Fig. 1 is the perspective view of the explosion of monotubular ammunition packing structure.

Fig. 2 is bitubular ammunition packing structural schematic diagram.

Fig. 3 is two bundle component structural schematic diagrams.

Fig. 4 is pile ammunition packing structural schematic diagram.

Fig. 5 is the external structure of monotubular ammunition packing structure and its enlarged diagram of part ring muscle.

Fig. 6 is the structural schematic diagram of cover part.

Fig. 7 is the structural schematic diagram of cylinder, sealing ring and cover.

In figure,

1, pedestal；11, first support；111, the first half slot；112, the second half slot；12, second support；121, third Half slot；122, the 4th half slot；13, it latches；14, boss；15, groove；2, cylinder；21, ring muscle；211, side wall；22, it positions Block；23, epitaxy part；3, cover；31, carrying handle；32, tubular lobes；33, locating part；34, sealing plug；4, anchor ear；5, it seals Circle；51, insertion part；52, interconnecting piece；6, the first bolster；7, bullet point protective case；8, the second bolster；9, ammunition.

Specific embodiment

With reference to the accompanying drawings of the specification to a kind of detailed explanation and illustration of ammunition packing structure progress of the present invention.

As shown in Fig. 1 to 7, the present embodiment specifically discloses a kind of ammunition packing structure, " ammunition involved in the present embodiment 9 " include but is not limited to " rocket launcher bullet ", " shell ", " rifle grenade ", " police bullet ", " aerial bomb " etc., the cartridge bag being related to Assembling structure is described as follows.

As shown in Figure 1, the ammunition packing structure includes pedestal 1 (or being cylinder bottom), cylinder 2 and cover 3, pedestal 1, cover 3 are respectively arranged at 2 both ends of cylinder, and screw thread is designed in 2 bottom of cylinder, and pedestal 1 is connect with 2 thread seal of cylinder, cover 3 and cylinder 2 It is fixedly connected by anchor ear 4, the junction of cover 3 and cylinder 2 is provided with sealing ring 5, and pedestal 1, cylinder 2 and cover 3 form close Seal space；Wherein, the structures such as cylinder 2 can be used antistatic material and be made, and carry out antistatic process to bullet so as to omit；It embraces Hoop 4 may include the first half hoop and the second half hoop being hinged, and first half hoop one end and second half hoop one end are hinged, and the first half hoop is another One end is locked with the second half hoop other end, and anchor ear 4 is stuck in the junction of cover 3 Yu cylinder 2, to realize cover 3 and cylinder Body 2 is fixed.In the present embodiment, as shown in fig. 7,2 one end of cylinder connecting with cover 3 is circumferentially arranged epitaxy part 23, extension Form annular groove between portion 23 and cylinder 2 (annular groove is covered by epitaxy part 23)；Sealing ring 5 is preferably rubber ring, and is sealed Circle 5 has integrally formed insertion part 51 and interconnecting piece 52, and insertion part 51 is embedded in annular groove, from the right side Fig. 7 to left side side It is in two-stage step shape to, 52 section of interconnecting piece, interconnecting piece 52 includes first step portion and second step portion, first step portion and the Two stage portions all have top surface and side, and the top surface in first step portion is connected and is vertically arranged with the side in second step portion, When cylinder 2 and cover 3 fasten, the side of second step and the end face of cover 3 recline, top surface and the cover 3 of first step Medial surface reclines, and is then again compressed cylinder 2 and cover 3 by the coupling mechanism force of anchor ear 4, to realize the close of cylinder 2 and cover 3 Envelope, at this point, cylinder 2, cover 3, sealing ring 5 and pedestal 1 form an enclosure space, to realize the leakproofness of packing tube, simultaneously Has the function of rainproof.

For specifically, as shown in Figure 1, being provided with the first bolster 6, bullet point protective case 7 and second in sealing space Bolster 8, side and 1 inner wall of pedestal of the first bolster 6 recline, the other side of the first bolster 6 and the one of bullet point protective case 7 End reclines, and bullet point protective case 7 has and the matched accommodating chamber of 9 bullet of ammunition, wherein the first bolster 6 is towards one end of ammunition It can be provided with circular holding tank, one end insertion of the holding tank ammunition feed point protective case 7, so that the fixed stability of ammunition is improved, And play weight loss effect；The side of second bolster 8 reclines with 9 projectile tail of ammunition, the other side of the second bolster 8 and cover 3 Inner wall reclines, and the second bolster 8 is reliably fixed ammunition and subtracts preferably to be circumferentially provided with the cylindrical structure of through-hole to play The double action of weight.In addition, rib muscle can be radially provided on the outside of bullet point protective case 7, so that bullet point protective case 7 and the first bolster 6 connections are stronger, and play the role of the reinforcement of 7 self structure of bullet point protective case.

As shown in Fig. 2, the ammunition packing structure further includes bracket, first support 11 and second support 12 are specifically included, the One bracket 11 has the first half slot 111 and the second half slot 112, and second support 12 has third half slot 121 and the 4th half Circular groove 122, the first half slot 111 and the third half slot 121 being oppositely arranged form first fixed for a cylinder 2 and lead to Hole, the second half slot 112 being oppositely arranged and the 4th half slot 122 form second through-hole fixed for another cylinder 2, with Realize the whole assembly that two sealed package cylinders are embraced to by first support 11, second support 12, completed two packing tubes, In the present embodiment, as shown in Fig. 2, preferably hollow stent structure on the inside of 11 inside of first support and second support 12, to rise It being acted on to preferable loss of weight, packing tube overall weight provided by the invention is light (it is about 12kg that monotubular, which loads lower weight), in order to Individual soldier's portable, individual soldier's portable can carry out monotubular or bitubular portable, be more suitable for battlefield surroundings complicated and changeable；First support 11 with Second support 12 is fixedly connected by lock 13；In the present embodiment, lock 13 is respectively set in the both ends of bracket, to realize to bracket Fixation；First support 11 and second support 12 form bundle component, and two bundle components are symmetrically arranged at 2 front and back two of cylinder Side.

As shown in Figure 3,4, under pile state, first support 11 is set to the top of second support 12, in the present embodiment, The upper surface of first support 11 extends upward the boss 14 for being inserted into groove 15, and the lower surface of second support 12, which is provided with, to be used for The groove 15 that boss 14 is embedded in, groove 15 and boss 14 match setting：Groove 15 is for the insertion of boss 14, boss 14 for inserting Enter in groove 15.For realization while multiple packing tubes are assembled, in the present embodiment, as shown in figure 4, two neighbouring binding groups It is connected between part by boss 14 and groove 15, completes the design of bracket piling structure, which includes multiple bindings Component, consequently facilitating transport and stablize placing to multiple packing tubes.It should be noted that the present embodiment is to groove 15 and convex The position description of platform 14 is that facilitate the understanding of the present invention, when implementation, boss be can be set in second support and groove can be with It being set in first support, wherein first support also can be set in the lower section of second support, specific structure type variation, It is subject to and can be realized convenient pile function.

As shown in figure 5, having ring muscle 21 2 outer wall surface of cylinder is circumferentially arranged, wherein the portion of arrow meaning shown in Fig. 5 It is divided into the amplifier section in dashed circle, ring muscle 21 has the side wall 211 with 2 outer wall vertical of cylinder；First support 11 and second Bracket 12 is both secured between two ring muscle 21, and two sides of first support 11 and/or two sides of second support 12 are same When lean with the side walls 211 of two ring muscle 21.In addition, the outer wall surface in cylinder 2 further extends outward out locating piece 22, first The locating slot being embedded in for locating piece 22 is provided on bracket 11 and/or second support 12.By designing ring muscle 21 and locating piece 22, The present embodiment can be realized more securely to be fixed between cylinder 2 and bracket.

As shown in fig. 6, the ammunition packing structure further includes carrying handle 31, carrying handle 31 be in U-shape and including a grip part and Two sliding parts in grip part two sides, carrying handle 31 is for opening cover 3；Cover 3 extend outward two it is disposed in parallel Tubular lobes 32, sliding part are inserted into tubular lobes 32, and sliding part is slidably connected with tubular lobes 32, i.e., will open cover 3 When, carrying handle 31 is extracted out from tubular lobes 32；The fixed finite place piece 33 in the end of sliding part, the outer diameter of locating part 33 are greater than pipe The internal diameter of shape protrusion 32.In the present embodiment, it is provided with detection hole on cover 3, sealing plug 34 is installed in detection hole, the sealing Plug screw 34 and then for realizing being detected whenever and wherever possible to packing tube air-tightness and bearing capacity.

The present embodiment, which can be carried out as follows, shoots and takes bullet：

(1) it shoots：Pedestal 1 is screwed 2 bottom of cylinder in such a way that thread seal connects by first mounting seat 1；So The first bolster 6 is put into from 2 mouthfuls of cylinder afterwards, straight cylinder bottom；Again by 7 sets of bullet point protective case on 9 bullet of ammunition, later by bullet Medicine 9 is by contacting bullet point protective case 7 with the first bolster 6 in 2 mouthfuls of loading cylinders 2 of cylinder；Second bolster 8 is put into cylinder 2 It is interior, it is contacted with 9 projectile tail of ammunition；Cover 3 is fastened, then is connected cylinder 2 and cover 3 by anchor ear 4, locks anchor ear 4.

(2) bullet is taken：Anchor ear 4 is opened, then the carrying handle 31 on cover 3 is pulled out, carrying handle 31 is lifted up to open cylinder Lid 3；Ammunition 9 is taken out after taking out the second bolster 8, then takes away the bullet point protective case 7 of 9 bullet of ammunition, and then use ammunition.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In the description of this specification, reference term " the present embodiment ", " one embodiment ", " some embodiments ", " show The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure, Material or feature are included at least one embodiment or example of the invention.In the present specification, above-mentioned term is shown The statement of meaning property is necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the spy of description Point may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, Those skilled in the art can be by different embodiments or examples described in this specification and different embodiments or examples Feature is combined.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modification, equivalent replacement and simple modifications etc., should all be included in the protection scope of the present invention in content.

Claims (10)

1. a kind of ammunition packing structure, it is characterised in that：The ammunition packing structure includes pedestal (1), cylinder (2) and cover (3), The pedestal (1), the cover (3) are respectively arranged at the cylinder (2) both ends, the pedestal (1) and the cylinder (2) screw thread It is tightly connected, the cover (3) is fixedly connected with the cylinder (2) by anchor ear (4), the cover (3) and the cylinder (2) Junction be provided with sealing ring (5), the pedestal (1), the cylinder (2) and the cover (3) form sealing space；It is described It is provided with the first bolster (6), bullet point protective case (7) and the second bolster (8) in sealing space, the one of the first bolster (6) Side reclines with pedestal (1) inner wall, and the other side of the first bolster (6) and one end of bullet point protective case (7) recline, and the bullet point is protected Sheath (7) has and the matched accommodating chamber of ammunition bullet；The side of second bolster (8) reclines with ammunition projectile tail, the second buffering The other side of part (8) reclines with cover (3) inner wall.

2. ammunition packing structure according to claim 1, it is characterised in that：The ammunition packing structure further includes first support (11) and second support (12), the first support (11) are described with the first half slot (111) and the second half slot (112) Second support (12) has third half slot (121) and the 4th half slot (122), first half slot being oppositely arranged (111) first through hole fixed for a cylinder (2) is formed with the third half slot (121), described the be oppositely arranged Two half slots (112) and the 4th half slot (122) form second through-hole fixed for another cylinder (2)；Described One bracket (11) is fixedly connected with the second support (12) by latching (13).

3. ammunition packing structure according to claim 2, it is characterised in that：The first support (11) and second described Frame (12) forms bundle component, and two bundle components are symmetrically arranged at cylinder (2) front and rear sides.

4. ammunition packing structure according to claim 2 or 3, it is characterised in that：The first support (11) is set to The top of two brackets (12), the upper surface of first support (11) extend upward boss (14), the lower surface of second support (12) It is provided with groove (15), the groove (15) and the boss (14) match setting：Groove (15) is embedded in for boss (14), is convex Platform (14) is for being inserted into groove (15).

5. ammunition packing structure according to claim 4, it is characterised in that：Lead between two neighbouring bundle components The boss (14) and the groove (15) connection are crossed, which includes multiple bundle components.

6. ammunition packing structure according to claim 2 or 5, it is characterised in that：In cylinder (2), outer wall surface is circumferentially set It is equipped with ring muscle (21), the ring muscle (21) has the side wall (211) with cylinder (2) outer wall vertical；The first support (11) and The second support (12) is both secured between two ring muscle (21), two sides of first support (11) and/or second support (12) two sides lean with the side wall (211) of two ring muscle (21) simultaneously.

7. ammunition packing structure according to claim 6, it is characterised in that：In the cylinder (2), outer wall surface is also outside Extend locating piece (22), is provided in the first support (11) and/or the second support (12) for the locating piece (22) locating slot being embedded in.

8. according to claim 1, ammunition packing structure described in any claim in 2,3,5, it is characterised in that：The cartridge bag Assembling structure further includes carrying handle (31), and the carrying handle (31) is in U-shape and including a grip part and in the grip part two sides Two sliding parts；The cover (3) extends outward two tubular lobes (32) disposed in parallel, and the sliding part is inserted into In the tubular lobes (32), the sliding part is slidably connected with the tubular lobes (32)；The end fixation of sliding part is limited Position part (33), the outer diameter of locating part (33) are greater than the internal diameter of tubular lobes (32).

9. ammunition packing structure according to claim 8, it is characterised in that：It is provided with detection hole on the cover (3), in institute It states and sealing plug (34) is installed in detection hole.

10. according to claim 1, ammunition packing structure described in any claim in 2,3,9, it is characterised in that：With it is described Cylinder (2) one end of cover (3) connection is circumferentially arranged to be had epitaxy part (23), the epitaxy part (23) and the cylinder (2) it Between form annular groove；The sealing ring (5) has integrally formed insertion part (51) and interconnecting piece (52), the insertion part (51) Be embedded in the annular groove, the interconnecting piece (52) includes first step portion and second step portion, the first step portion and The second step portion all has top surface and side, and the top surface in first step portion is connected with the side in second step portion and vertical sets It sets, the side of second step and the end face of cover (3) recline, and the top surface of first step and the medial surface of cover (3) recline.