CN1045908C

CN1045908C - Improved pneumatic gun and projectiles therefor

Info

Publication number: CN1045908C
Application number: CN92101076A
Authority: CN
Inventors: J·B·福勒
Original assignee: Compri Technic Pty Ltd
Current assignee: Compri Technic Pty Ltd
Priority date: 1992-02-19
Filing date: 1992-02-19
Publication date: 1999-10-27
Anticipated expiration: 2007-02-19
Also published as: CN1075432A

Abstract

The present invention relates to a hand-hold air gun which is provided with an air passage connected to a compressed air source, wherein the air passage is communicated with an air chamber via a touch valve assembly. The hand-hold air gun comprises a detachable beech, which is supported in a seal position by a supporting ring so as to be butted with the air chamber, wherein the supporting ring is fixed to a main body and can pivot. When the breech is not supported in the seal position, unless the breech is butted with the air chamber, an interlocking assembly can be interlocked with the touch valve assembly in a sealing mode so as to forbidden the initiation of the touch valve. The breech is combined with a spraying nozzle which can be fixed on a flexible hose or at one end of a pipeline. A propellant made of polymer is placed inside the breech, and air pressure passes through the flexible hose or the pipeline, so that the inner part of the pipe is cleaned or dirt is removed out of the pipeline.

Description

Hold pneumatic gun

The present invention relates to a kind of pneumatic gun, be specifically related to a kind of compressed air that utilizes and carry out flexible pipe or the Clean-pneumatic gun of pipe interior.

The problem that keeps flexible pipe, pipeline or pipe-line system cleaning inside is a kind of continuous all the year round problem.When flexible pipe or pipeline are used in for example food industry or the medical environment, be a crucial problem for the holding tube line cleaning.Similarly, in hydraulic pressure and air pressure pipeline, the pipe internal contamination may cause pause fault and expensive shutdown loss.Have multiple other situations also to adopt flexible pipe, pipe fitting, conduit and pipeline in other industrial aspect, cleaning is indispensable in the pipe, thereby can get rid of the replacement pipe fitting thus cost is reduced.

A kind of is the sort of compressible projectile device by this flexible pipe or pipeline under the pressurized situation that forces to cleaning flexible pipe and the very effective known devices of pipeline, and wherein to have an internal diameter than this flexible pipe or pipeline be big external diameter in this projectile.When flexible pipe or pipeline are advanced, just on inwall, remove particulate matter by this projectile.Can repeatedly pass through under the pressurized situation total length of flexible pipe or pipeline of available a plurality of projectile is to guarantee to remove all contaminants matter.The general device of finishing this kind cleaning operation places the projectile in one compressor gun, activates a valve then and causes flow through this rifle and enter in the pipeline via a nozzle that is linked in the end of flexible pipe or pipeline of compressed air.Compressed air forces the projectile to enter in this deferent and along the length of tube direction by this nozzle to advance to clean the inside of this pipeline.

This type equipment has a kind of problem promptly: can work satisfactorily for making this equipment, the most important thing is not have air bleed between pneumatic gun and pipeline and guarantee that this projectile do not block in flexible pipe or pipeline.Because flexible pipe and pipeline have multiple diameter and material, therefore there is the demand of the pneumatic gun that proposes a kind of flexible pipe that can adapt to a series of scopes simply and duct products.

In common the 4th, 974, No. 277 cases of United States Patent (USP) of transferring the possession of, to describe and hold pneumatic gun, this pneumatic gun has the airway that is linked in compressed air source, and this airway also is communicated with air chamber via touching valve.This pneumatic gun includes detachable breech, and this breech is connected to this air chamber in the sealed engagement mode via the support ring supporting that can pivotally be fixed in this pneumatic gun main body.This breech combines with nozzle, and this nozzle then is fixed in an end of flexible pipe or pipeline, and the projectile that a polymer is made is positioned in this breech, forces this projectile to move through flexible pipe or pipeline by air pressure, so that clean within this flexible pipe or the pipeline.

Fig. 1 and 2 is clearly shown that the traditional, pneumatic rifle that is described in No. 4,974,277, this general known United States Patent (USP).This pneumatic gun 10 comprises: comprise the handle 11 of finger grip part 12, this handle is fixed on the shank 13 with hold-down screw 9 bolts.These main part 13 tool annulus profiles also have the front surface 14 that limits air chamber 15.Just as shown in Figure 2, air chamber 15 has the opening 17 of centrally-located, and this opening 17 is communicated with airway 18, and this airway 18 itself touches valve 20 through spring load and is communicated with airway 19 in the handle 11.The base of handle 11 has with the opening 21 of internal thread wherein can connect compressed air source, makes that air can enter in the air chamber 15 by handle and

airway

19 and 18 when releasing shake-up valve 20.

At front surface 14 places of main part 13, be provided with ring-shaped bearing ring 22, this support ring has smooth rear surface 23 and front surface 24.One side of support ring 22 has protuberance 25, and around being bearing on the pin 26, this is outstanding in abutting connection with these pneumatic gun front surface 14 handle places certainly to 27 of connecting plates between a pair of connecting plate 27 for this protuberance 25.So support ring 22 just is fixed on this pneumatic gun, so that pivot the enable possition that is displaced to as shown in Figure 1 from closing position as shown in Figure 2, and in the enable possition in Fig. 1, wherein this ring can freely pivot down and leave this air chamber 15.

L shaped latch fitting 28 articulates via pin 29 and is fixed on the main part 13 upside rear surfaces.Latch fitting 28 has extension forward, and this extension ends on the taper locking joint tongue 30, and this joint tongue 30 is positioned to be formed in the peripheral upper cut of support ring 22 portion 32.This locking joint tongue 30 has a shoulder 31, and this shoulder 31 cooperates the front surface 24 of this ring 22 of butt to fix this ring 22 on closing position as shown in Figure 2.This latch fitting 28 is forced to move towards latched position shown in Figure 2 by spring (not showing).Just as shown in Figure 1, by the rear portion 33 of pushing latch fitting 28, joint tongue 30 just pivots the notch 32 that leaves on the ring 22, thereby allows this ring 22 to pivot and open.

The breech and the nozzle assembly for fluid 35 of combination have interior cylindrical hole 36, and this hole 36 diminishes gradually towards outboard end 37 and gnaws part 38 to limit spray.Interior cylindrical hole 36 limits the breech for projectile (not showing) usefulness.This combination breech and nozzle assembly for fluid 35 removably are bearing on the pneumatic gun by support ring 22, and the inner surface 39 of this support ring 22 is configured to closely be snug fit on the locating surface 40 that is formed on breech cylindrical part outside.Support ring 22 location butts are formed on the annular shoulder 41 of outer frustoconical part 42, and this outer frustoconical part 42 then is parallel on the wall that is formed on air chamber 15 and has the interior frustoconical surface 43 of analogous shape.Be provided with cannelure 44 on the interior frustoconical surface 43 of air chamber 15, wherein settle with suitable O-shape ring 45.This O-shape ring 45 is configured to frustoconical surface 42 sealed engagement with the annular shoulder 41 of breech/nozzle 35.The inner surface 39 of support ring 22 also is provided with cannelure 46, wherein is positioned with O-shape ring 47.Seal on the outer periphery of these O-shape ring 47 formation nozzle/breech sub-assemblies 35.

When being in the enable possition when support ring 22 non-lockings, breech/nozzle assembly for fluid 35 can break away from this ring by narrow end 37 being slid through ring 22.Mode according to this can be by the multiple different breech/nozzle assembly for fluid of this ring bearing, and every-individual breech/nozzle assembly for fluid all has and is equivalent to pneumatic gun with the flexible pipe of the different-diameter that uses or the various outer diameter of pipeline.

In fact, with above-mentioned pneumatic gun various problems can appear.At first, when being assemblied in breech/nozzle assembly for fluid 35 on the pneumatic gun when forcing in the end that is engaged in flexible pipe or pipeline, handle 11 needs powerful list action with respect to the position of shank 13.Because handle 11 extends, therefore lever required power when producing in order to the pushing nozzle to flexible pipe or pipeline need be arranged below the main part 13 that laterally is attached with breech/nozzle assembly for fluid 35 thereon.Required additional wrist active force will cause the operator unbearably tired very soon.

The operation of relevant support ring 22 also can produce a plurality of problems.When support ring 22 is in as shown in Figure 1 enable possition, do not exist anyly to prevent that this ring from pivoting down and facility that the finger that makes the operator can avoid being positioned on the plate machine of pneumatic gun is crushed.Clearly, this kind phenomenon may become a kind of experience of misery and be the characteristics that this pneumatic gun is not expected.Have more and far-reachingly be, with locking mechanism illustrated in figures 1 and 2, also may be before the operation pneumatic gun and earlier breech/nozzle assembly for fluid 35 is not suitably located with air chamber 15 sealed engagement.Specifically, make it to encircle the required power of 45 sealed engagement owing to outer frustoconical part 42 with the O-shape of the interior frustoconical annular surface of air chamber 15 in order to pushing breech 35, may cause producing support ring 22 and not exclusively be retracted into its closing position, make notch 32 can not be properly positioned to the rear of the shoulder 31 of locking joint tongue 30.When this kind phenomenon took place, support ring 22 may not known by the operator by locking fixedly the remaining on closure state to a certain degree of joint tongue 30, caused the operator may use this pneumatic gun before this breech sealing butt air chamber 15.Under the situation of breech blow-by butt air chamber 15, then can not produce at the rear of projectile has sufficient pressure to force this projectile to be passed through to be connected in the total length of the flexible pipe or the pipeline of nozzle.Also exist a kind of danger this moment is that breech/nozzle assembly for fluid is being compressed under the pressure of air and may ejecting, and the phenomenon that a kind of safety for the user has serious threat occurs, and may undermine this pneumatic gun and other equipment.

Though the above-mentioned pneumatic gun of holding is accepted widely and can carries out its function well, still can meet with multinomial problem during using this pneumatic gun.The present invention relates to the multinomial improvement of this pneumatic gun, and these improvement require to make to respond the end user for overcoming the problems referred to above.Therefore, the object of the present invention is to provide a kind of compressed air that utilizes to carry out flexible pipe or the Clean-pneumatic gun of pipe interior.

The multiple type that the present invention also relates to this pneumatic gun and adopted through the improvement projectile.

According to an aspect of the present invention, provide with a kind of pneumatic gun of holding, this pneumatic gun has the airway that is configured to be linked in compressed air source, and this airway is communicated with air chamber via touching valve gear; Have and adapt to removable breech supported on a sealing station, and on the sealing position, this this air chamber of breech sealing butt; Also have and be configured at this breech not when its sealing station is supported, touch the interlocking sub-assembly of valve gear interlocking with this, thereby in use,, just forbid this shake-up valve gear that priming allows compressed air to flow through unless this breech sealing is connected to this air chamber.

Comparatively ideally be, this breech is by the coaxial supporting of support ring, and this support ring can move to the closing position of this this air chamber of breech sealing butt from the enable possition that this breech can be disassembled, and when this support ring also not exclusively is retracted into its closing position, then should interlocking sub-assembly and this shake-up valve gear interlocking.

Advantageously, one can release and engage this support ring when the part configuration unblanked is formed in closing position.Comparatively ideally be, this interlocking sub-assembly comprises can pivot member, this member is connected in this shake-up valve gear effectively and is suitable for when this shake-up valve gear of priming, this member just is pivoted, therefore in use, if this support ring also not exclusively is retracted into its closing position, engages this and can release and unblank part so that forbid activating this shake-up valve gear just this can pivot member.

According to another aspect of the present invention, the projectile that provide employed, is the bullet form with above-mentioned pneumatic gun, and this projectile comprises:

The cylindrical part that the foam plastic material is made; With

One or more layers is adhered to the grinding-material of this cylindrical part, to strengthen the cleaning function of this projectile.

Provide projectile employed with above-mentioned pneumatic gun, that be a bullet form according to another aspect of the present invention again, and this projectile comprises:

The cylindrical part that the foam plastic material is made is characterized by this cylindrical part and is made up of multi-layered foamed plastic material, and wherein the density in each room all is adjacent the density difference of layer.

Comparatively ideal is that this foam plastic material layer is expanded on the dromic direction of advancing perpendicular to this projectile basically.

Comparatively ideally be that this foam plastic material layer increases by density or the level that reduces is made into the lamination sheet.The density of this foam plastic material layer is typically by changing between 80 to 200 kilograms of/cubic metre scopes.

Essence to moving pneumatic gun of the air pressure of improvement and projectile has clearer understanding, only is described as an example with reference to the most preferred embodiment of institute's accompanying drawing this pneumatic gun and projectile, wherein:

Fig. 1 is one and is positioned at the not side view of the traditional, pneumatic rifle of the support ring of latched position with one;

Fig. 2 is for the pneumatic gun among Fig. 1 but with the profile of a breech/nozzle assembly for fluid that is attached thereon;

Fig. 3 is that the most preferred embodiment of the pneumatic gun of an improvement also has a perspective view that is positioned at the support ring of latched position;

Fig. 4 is the side view of the pneumatic gun of Fig. 3;

Fig. 5 is the side view of the pneumatic gun of Fig. 3;

Fig. 6 is the upward view of the pneumatic gun of Fig. 3;

Fig. 7 also has the part cut away view of a breech/nozzle assembly for fluid that is attached thereon for Fig. 3 to 6 pneumatic gun;

Fig. 8 (A), 8 (B) and 8 (C) are the profile of breech/nozzle of three kinds of different types being used for pneumatic gun;

Fig. 9 illustrates the another kind of breech/nozzle that does not need connecting ring;

Figure 10 (A) and 10 (B) illustrate the connecting ring that is used for breech/nozzle shown in Fig. 8 (A), 8 (B) and 8 (C);

Figure 11 and 12 illustrates two kinds of patterns with the projectile of the improvement of one or more layers grinding layer; With

Figure 13 illustrates the projectile of the improvement of another kind of different types.

It shown in Fig. 3 to Fig. 7 the most preferred embodiment of the pneumatic gun of a kind of improvement of the present invention.This pneumatic gun 50 comprises: handle 52, and this handle 52 is integrally formed with main part 54.Main part 54 has rounded cross section and is located at the air chamber 56 of its front end face.Air chamber 56 has the opening 58 of centrally-located, and this opening 58 is communicated with airway 60, and this airway 60 is communicated with the airway 62 that is positioned at main part 54 1 sides via spring load shake-up valve assembly 64 itself.Just as can be by being clear that among Fig. 4,5 and 6, have air intake 66 in a side of main part 54 with internal whorl, wherein can connect compressed air source, make that when releasing out the shake-up

valve air airway

62 and 60 of can passing through flow in the air chamber 56.

With reference to Fig. 7, this shake-up valve assembly 64 comprises: be configured to can pivot in order to priming the finger plate machine 68 of member 70, this can pivot member 70 and can pivotally be installed in the hollow handle 52 and can pivot in its lower end by the pin 72 on handle 52 tops around horizontal expansion.To its not priming position, this helical spring 74 then bears against in the opposite side of member 70 in contrast to plate machine 68 finger plate machine 68 by helical spring 74 biasings.When with 68 primings of plate machine, can make to pivot in the hollow hole 76 of member 70 in being arranged at handle 52 to pivot.Adjoining 77 places, upper end, this can pivot member 70 and engage with the rear end of the valve rod 78 of the valve 80 of this shake-up valve assembly 64.

Touching valve assembly 64 comprises again: be installed on the nylon sleeve 82 in the endoporus 84 of this pneumatic gun main part 54.This nylon sleeve 82 is provided with two cannelures in its outer surface, in wherein admitting two O-shapes ring 86, to provide a kind of sealing relationship between sleeve outer surface and hole 84 inner surfaces.On the sidewall of sleeve 82, be provided with a plurality of openings 88, so that air can pass to sleeve inner from the sleeve outside.Valve 80 is supported by the slidably valve rod 78 that is received in wherein in the medium pore of a sleeve 82.Valve 80 has been set up conical surface, and this conical surface is tapered and is suitable for openend as closure sleeve 82 towards valve rod 78.Helical spring 90 eccentrically arranged valves 80 make it the oral area sealed engagement with sleeve 82, to prevent the air valve assembly 64 of flowing through.Figure 7 shows that this valve 80 is in the situation of its normally closed position.

When depress plate machine 68, can pivot member 70 rotates around pin 72, and the upper end 77 of this member 70 promotes butt valve rods 78 with open valve 80, therefore allows flow through oral area, opening 88 and the airway 60 of airway 62, sleeve 82 of compressed air to enter in the air chamber 56.

The lever that is arranged on the handle 52 designs for operator's convenience, makes it by pressing plate machine 68 priming expediently and touches valve.Moreover the lever on the handle 52 is arranged such that the hand of operator's gripping handle can partly buckle on the central axial line of the breech 96 that is held in air chamber 56 and is positioned at sealing station at least.When this kind configuration can be guaranteed in the end that nozzle 98 is pushed into flexible pipe or pipeline, need slightly or not only to need the lever action of wrist, can be applied directly under the lever action along on the axis 94 having only small on the handle 52 or do not have in order to the power that nozzle is pushed in flexible pipe or the pipe end because of required.

Latch fitting 100 can pivotally be fixed on the upper surface of main part 54 by pin 102.Be provided with on the latch fitting 100 with extension 104 forward, this forward extension be positioned to be formed on notch 106 on support ring 108 peripheries, this notch 106 is similar to the sort of notch of pneumatic gun shown in Fig. 1 and 2.Be provided with on the extension forward 104 of latch fitting 100 with shoulder 110, these shoulder 110 cooperations are connected to the front surface 112 of this ring 108 will encircle 108 closing positions that are fixed in shown in Fig. 3 and 4.Latch fitting 100 is forced to move to the latched position shown in Fig. 3 to 4 by spring 113.By the rear end 114 of pushing latch fitting 100 down, this forward extension 104 just pivot the notch 106 that leaves on the support ring 108, thereby allow and should open around pivot rotates.

Spring 113 is positioned to be respectively formed in the recess of upper surface pairing of the bottom surface of latch fitting 100 and main part 54.Comprise integrally formed and be positioned at the interlocking sub-assembly 116 of the protuberance 118 of its bottom surface with latch fitting 100, in the time can pivoting member 70 and pivot by 68 primings of plate machine, this sub-assembly with can pivot that end 77 joints stretch out on the part 70 down.Just as shown in Figure 7, plate machine 68 is in its resting position, makes the upper end 77 can pivot member 70 not engage with interlocking sub-assembly 116, though work as latch fitting 100 pivot to as shown in Figure 7 its not latched position also be like this.But be positioned at it not under the situation of latched position at latch fitting 100, the operator can't hold 68 primings of plate machine by button and touch valve, because of the upper end 77 that can pivot member 70 is arranged at protuberance 118 on latch fitting 100 bottom surfaces with joint.Therefore, the shake-up valve assembly 64 that can forbid this permission compressed air circulation of priming by the interlocking sub-assembly 116 that comprises protuberance 118 in the present embodiment and the upper end 77 that can pivot member 70.

Therefore, when if latch fitting 100 is not in its complete latched position, for example occur in the situation that makes shoulder 110 be positioned notch 106 because support ring 108 is not retracted into its complete closing position fully and be not connected to the front surface 112 of this ring, interlocking sub-assembly 116 is just interlocked with touching valve 64, therefore prevents priming to allow compressed air to feed the shake-up valve of breech 96.Therefore the operator will be cautioned, and point out that in fact breech is not appropriately located to sealing butt air chamber 56.The location of breech 96 in air chamber 56 is in full accord with the sort of location situation of the breech of pneumatic gun shown in Fig. 1 and 2 basically, will not remake repeated description at this.

In the present embodiment, interlocking sub-assembly 116 constitutes by being provided at the interlocking configuration that can pivot between member 70 and the latch fitting 100.Latch fitting 100 is provided with outstanding down protuberance 118, and the upper end 77 that this protuberance is designed to can make it when latch fitting 100 is not in its complete latched position with pivoting member 70 engages.Therefore, if the rear end 114 of latch fitting 100 pivots a little down, protuberance 118 will engage the upper end 77 that can pivot member 70 and prevent that member 70 from pivoting.Very clear and definite, also can adopt such as to those of ordinary skill in the art for the replacement form of apparent and easy to know interlocking sub-assembly so that suitable with it mechanical function to be provided.

Support ring 108 can pivotally attach on the main part 54 of this pneumatic gun via a pair of connecting plate 120 and pin 122, and is similar to the sort of configuration of the pneumatic gun shown in Fig. 1 and 2.Yet shown in Fig. 4,6 and 7, main part 54 is provided with the lip 124 with the trunnion 122 of next-door neighbour's support ring 108, and this lip 124 is designed so that proper releasing when unblanking part 100, and the restriction support ring can pivot and the scope of opening.By restriction support ring institute can be down around the scope of the rotation that pivots, the degree but lip 124 will minimize to the incident that the operator damages.Another advantage that lip 124 is provided is: this lip provides area supported, makes support ring 108 to be statically placed on this area supported when pipeline that the replacement nozzle is inserted different size or flexible pipe.

For operating this pneumatic gun, be the inlet 66 that compressed air source between 100 to 140 ft lbf/square inches is linked in this pneumatic gun with general pressure.The projectile of the bullet form made from particular design and by polymer snugly is positioned in the breech 96, and the diameter of the bullet of being made by polymer is typically big by 20 percent than footpath within the pipeline for the treatment of cleaning or the flexible pipe.By using latch fitting 100 to release spending carrier ring 108, this projectile is placed in the rear portion of breech/nozzle, closed hoop 108 makes it butt latch fitting 100 and this projectile is written in the breech 98 then.Must guarantee that support ring 108 is retracted into its closing position fully and shoulder 110 leaves standstill the front surface that is connected to ring 108 as mentioned above, otherwise interlocking sub-assembly 116 will hinder the priming that touches valve.Then the free end of breech/nozzle 98 is linked to the pipeline at problem place, priming touches valve 64 makes compressed air flow into the end face of projectile in air chamber 56 and the butt breech 98.Air pressure forces the projectile to discharge and enter this pipeline through nozzle 98, and forced to move with all the internal contamination things in the eliminating pipeline along the pipeline total length.On support ring 108, adopt detachable breech/nozzle can allow the pneumatic bullet that adopts multiple size dimension of robbing.

For making bullet can inject the flexible pipe or the pipeline of different size, be provided with a plurality of dismountable breech/nozzles so that pneumatic gun is linked on the pipeline at problem place.Fig. 8 (A), 8 (B) and 8 (C) and Fig. 9 illustrate four kinds of different sizes thorax/nozzle afterwards, in order to the projectile of different size is injected in flexible pipe or the pipeline.Projectile or bullet are inserted in the breech, then this breech are positioned the sealing station of its air chamber that is butted on pneumatic gun 56.Suppose that support ring 108 has been retracted into its complete closing position, when priming plate machine 68, compressed air just forces the projectile to be injected in the nozzle 98.When the projectile is transported to the end of flexible pipe or pipeline under the pressurized situation, in the porch, this projectile is fettered and is injected in flexible pipe or the pipeline with compressive state.When the projectile entered in the end of flexible pipe or pipeline, just expanded slightly in this projectile thereafter, but still remain on a kind of state that is essentially compression in it in by the stroke of flexible pipe or pipeline.

The breech 96 that is shown in the nozzle among Fig. 8 has reduced its metal use amount after retrofiting, therefore reduced the overall weight of breech/nozzle.The breech 96 of each nozzle be provided be described in United States Patent (USP) the 4th, 974, the breech on the nozzle that pneumatic gun adopted in No. 277 cases relatively has the exterior annular lip 126 than minor diameter.Known nozzle all has the breech that its external diameter is designed to closely to cooperate the air chamber 56 of pneumatic gun.Yet, with this have nozzle than minor diameter cause need be heavier metal derby forming larger-diameter breech, and this metal pouring weight itself increases the weight of this pneumatic gun.For the breech/nozzle with novelty attaches on the pneumatic gun, be provided with connecting ring 128 (consulting Figure 10), this connecting ring engages with lip 126, and this ring has external diameter and the profile of making the interior size of the air chamber 56 that is receivable in this pneumatic gun and support ring 108.The outer periphery surface 129 of connecting ring 128 is designed to be received in the support ring 108 in the close fit mode.Connecting ring 128 is made comparatively desirable by acetal, and acetal is a kind of synthetic material of comparing lighter weight with the metal material of making breech/nozzle, therefore facilitates the overall weight of a large amount of attenuating breech/nozzles and employed pneumatic gun.Figure 10 (A) is the profile of connecting ring 128, and Figure 10 (B) then is the enlarged drawing of the part of Figure 10 (A).On the inner surface of connecting ring, provide, in this groove, admit O-shape ring 130 between this connecting ring and a breech/nozzle of admitting within it, to provide gas-tight seal with cannelure.Pneumatic gun shown in Fig. 3 to 7 all is equipped with this connecting ring 128 on it.

Breech/nozzle assembly for fluid shown in Figure 9 is similar to and is described in United States Patent (USP) the 4th, 974, the breech/nozzle assembly for fluid that pneumatic gun adopted in No. 277 cases, and wherein the external diameter of breech 96 only is slightly less than the internal diameter of the air chamber 56 of pneumatic gun.Yet the profile on an outer periphery surface 97 of breech 96 has been retrofited and has been made it to be similar to the periphery surface 129 of connecting ring 128, is sealed and matched to provide one in support ring 108.

This pneumatic gun can adopt by stainless steel or nylon or other plastic materials make to cooperate the various forms breech/nozzle assembly for fluid of flexible pipe, pipeline or the various diameters of pipeline engineering.This breech/nozzle assembly for fluid is suitable for being connected to this hookup with the flexible pipe of connector or hookup also can to adopt a kind of breech/nozzle assembly for fluid to make it to be fit to the end assembling.This pneumatic gun also can be in order to pass through a conduit with attached projectile emission with cord thereon, in this cord can be in order to pull out the cable of laying by this conduit thereafter.This breech/nozzle assembly for fluid setting is with the device in order to the feeding cord, and this cord for example is a kind of nylon in lightweight rope that attaches to the projectile, and when this projectile was launched by this conduit, this installed this cord of just feeding.In this application example, this projectile is selected to such an extent that make its diameter slightly little than the internal diameter of conduit.This cable that is applied to lay of pneumatic gun must then can't utilize known technology to reach by a particularly useful and this laying of conduit with a plurality of elbows or turning.

The most preferred embodiment of this pneumatic gun typically can use the bullet of diameter between between 4mm to 60mm scope.These bullets typically are bonded and form a slice reclosing cavernous body and make with pressing cementing agent by polyurethane cavernous body part, or are made by the pure cavernous body of a slice, can cut out the cylinder-shaped bullet with above-mentioned diameter by this cavernous body.The length of each bullet changes between 20mm to 100mm according to the thickness that is cut into the sponge pieces of bullet.The polyurethane sponge pieces is cut into a kind of size and is glued together, and makes it to be formed on the reclosing cavernous body of the different densities between C-30 to C-140 density range.Typically be the height density reclosing cavernous body of employing between C-110 to C-140 scope to make the employed bullet of this pneumatic gun.Select as another kind, can adopt the pure cavernous body of the high density with similar density to make this bullet.Adopt the high-density sponge body comparatively desirable, also can prevent that air from flowing through this bullet so that can between projectile and pipeline or hose wall, provide sufficient friction to remove all contaminants on it.

For further helping the thing that decontaminates, can be on sponge pieces bonding grinding layer, this sponge pieces can cut out the projectile certainly, thereby is formed in the bullet that has grinding layer on its front surface or the rear surface, as shown in figure 11.Figure 11 illustrates by the made bullet 131 of polyurethane cavernous body 132, and is provided with grinding layer 134 in the one end.Grinding layer 134 typically is similar to make by fibroid nylon or other and is used in the plastic material that wipes article that household cleaning uses and makes.Also can cut out from the lamination sheet of cavernous body and grinding-material alternating layer bullet with make as shown in figure 12 with two or the bullet of multilayer grinding layer 134.Bullet also can be made into the grinding layer on all or part of outer surface that is coated in this bullet with for example coat of silicon carbide.

Figure 13 shows another embodiment of projectile, and this projectile can be used in the above-mentioned pneumatic gun, the cylindrical part 132 of this projectile wherein, and its feature is made up of multi-layered foamed plastic material, and the density of each layer all is adjacent the density difference of layer.In the present embodiment, this material layer in fact on the dromic direction of advancing perpendicular to this projectile the expansion and every layer in fact all parallel.Advantageously, these material layers can be made the lamination sheet by the level of increase or decreased density, to cooperate different application examples.The density of this foam plastic material layer typically changes between 80 to 200 kilograms of/cubic metre scopes.

Density range is restricted by multiple factor.At first, if the global density of projectile is too low, just then compressed air will not advance past flexible pipe or pipeline with this projectile by the projectile.On the other hand, if the density of foam plastic material is too high, this projectile can not be compressed in the nozzle again and can't inject the end of flexible pipe or pipeline.Moreover if the density of projectile is too high, then can't turn round by flexible pipe or ducted elbow or other discontinuous places in this projectile.Obviously, this projectile can have two or the multilayer superimposed thin layer together that laminates.This projectile also can or be coated with in the application examples that encapsulates then with lubricating oil for use in various high standard cleannes and degree of purification requirement through sterilization, sterilization.Advantageously, the absorption characteristic of the foam plastic material that adopt these projectiles means and it can be filled with suitable reagent, with the cleaning and/or the coating work of the inner surface of facilitating its pipeline of being passed through or flexible pipe.

This projectile also can be provided with one or more cannelure 136 on its outer periphery surface, makes when it passes through flexible pipe or pipeline, plays as the trap effect in order to the seizure pollutant.

Pneumatic gun of the present invention and projectile have in the following industrial non-multiple application examples of listing fully in the detail list:

8 japannings of 1 hydraulics

9 desalinations of 2 aerodynamics

10 de-scalings of 3 Food ﹠ Drink

It is 11 antirust that 4 powder are covered

The cleaning of 5 gun barrels and 12 air-conditioning equipments that oil

6 plumbing works and perfusion 13 are freezing

7 14 gases (assembling and maintenance) medically

Depend on that this pneumatic gun of its application examples can be by suitable material manufacturing, for example by cast aluminium alloy, stainless steel or rigid plastic and the manufacturing of other synthetic materials.

See it with regard to the above most preferred embodiment of the present invention, clearly the improvement of this pneumatic gun and projectile provides more known pneumatic gun to have far-reaching advantage.The overall weight that above-mentioned NM another advantage is a pneumatic gun reduces widely, and this overall weight reduce be owing to the size that reduces main part 54 and hollow hole 76 is set in pneumatic gun handle 52 reaches.For the ordinary skill in the art, clearly can make multiple remodeling and variation and do not break away from basic inventive concept of the present invention the foregoing description.For example, though in this most preferred embodiment, breech is to be connected on the air chamber 56 via support ring 108 supportings that can pivotally be fixed in this pneumatic gun main body in the sealed engagement mode, yet the configuration mode of supporting breech never only limits to this.For example, support ring needn't be for can pivotally being fixed on this pneumatic gun, and can by two or a plurality of latch fitting 100 that is similar to replace with this support ring support.Positively, this support ring can be used a plurality of latch fittings or clamp by complete exemption so that breech is fixed it with its peripheral butt air chamber.Those of ordinary skill in the art can revise above-mentioned interlocking sub-assembly easily and provide a kind of similar release mechanism to these replaceable configurations.All these remodeling and change will be considered to belong within the category of the present invention, and the real scope by above disclosed and appended claim of spirit of the present invention is stipulated.

Claims

1. hold pneumatic gun for one kind, have: be configured to be linked in the airway of compressed air source, this airway is communicated with air chamber via touching valve gear; Be suitable at the supported dismountable breech of sealing station this this air chamber of breech sealing butt in the sealing position; It is characterized in that, the configuration of interlocking sub-assembly is formed in this breech and does not make this interlocking sub-assembly and this shake-up valve gear interlocking when its sealing station is supported, thereby in use, unless this this air chamber of breech sealing butt is just forbidden the shake-up valve gear that this permission compressed air of priming circulates.

2. hold pneumatic gun according to claim 1, it is characterized in that, this breech is by the coaxial supporting of support ring, this support ring can be moved to the closing position of this breech sealing butt air chamber from this breech by the enable possition of demolition, and when this support ring not exclusively was retracted into its closing position, this interlocking sub-assembly and this touched the valve gear interlocking.

3. as the pneumatic gun of holding as described in the claim 2, it is characterized in that, can release the part of unblanking and be configured to engage this support ring so that this ring is fixed in closing position.

4. as the pneumatic gun of holding as described in the claim 3, it is characterized in that, this interlocking sub-assembly comprises the pivoted member that is linked in this shake-up valve gear effectively, and when priming should touch valve gear, make this member be suitable for pivoting, therefore in use, if this support ring not exclusively is retracted into its closing position, this can pivot member engages, and this can be released and unblanks part so that forbid this shake-up valve gear of priming.

5. as the pneumatic gun of holding as described in the claim 4, it is characterized in that this can be released the part of unblanking and be provided with protuberance on its lower surface, and this can be released the part of unblanking and is biased towards this can pivot the position that member does not engage this protuberance under normal conditions.

6. as holding pneumatic gun as described in any one in the claim 2,3,4 or 5, it is characterized in that wherein this support ring can pivotally be fixed on the main body of pneumatic gun.

7. as holding pneumatic gun as described in any one in the claim 2,3,4 or 5, it is characterized in that, also comprise the handle integrally formed with the main part of this pneumatic gun, when this handle construction becomes to make this handle of grasped of user, can partly detain at least on the central axial line of the breech that is held in this air chamber and is in its sealing station.

8. as the pneumatic gun of holding as described in the claim 2, it is characterized in that, also comprise connecting ring, this connecting ring is made has the external diameter that can be suitable for being assemblied in the size in the support ring and can be in the internal diameter of wherein admitting the size of breech coaxially.