CN100501209C - Plastic ball valve - Google Patents
Plastic ball valve Download PDFInfo
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- CN100501209C CN100501209C CNB2007101015428A CN200710101542A CN100501209C CN 100501209 C CN100501209 C CN 100501209C CN B2007101015428 A CNB2007101015428 A CN B2007101015428A CN 200710101542 A CN200710101542 A CN 200710101542A CN 100501209 C CN100501209 C CN 100501209C
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Abstract
The present invention relates to a ball valve, particularly a plastic ball valve. The ball valve includes valve body within flow passage, valve seat and integrated spool which pre-connects the valve bar and the valve ball into one unit, the valve ball of said integrated spool is installed in the valve body, the valve bar of said integrated spool passes through the valve body, said valve ball seat is matched with the valve ball of integrated spool, it is characterized by: said valve body is plastic valve body and is equipped with one or two plastic valve covers with through-hole, said plastic valve covers are bonded with the plastic valve body, the through-hole of said plastic valve cover is connected with the flow passage in plastic valve body. The product can make the rotation of valve ball in plastic ball valve more flexible, and make the ball valve products has longer use life and thus has highly practical value.
Description
Technical field
The present invention relates to a kind of ball valve, particularly a kind of ball valve made of plastic.
Background technique
Existing ball valve made of plastic generally adopts the manufacturing of one of following several schemes:
(A), as No. 03153661.1 disclosed a kind of polyvinyl plastic ball valve and packaging method thereof used of Chinese patent application with burying, this ball valve made of plastic adopts valve ball and valve rod split-type structural, like this, behind forming parts, valve rod and valve ball are put into valve body respectively assemble.This technology is that also one of realistic plan is generally used in existing ball valve made of plastic production, but, the defective that this scheme exists also is tangible, promptly be in the long-term using process of this kind ball valve, because the intensity of common plastics materials such as PVC, polypropylene or polyethylene is original just lower, the wearing and tearing because of valve rod and valve ball mating face cause the gap between the two to become big easily, finally cause breaking away between valve rod and the valve ball, the ball valve malfunctioning switch is scrapped ball valve fully, and shorten working life.
(B), as the production program of No. 92244526.5 disclosed integrated type ball valve made of plastic of Chinese utility model patent, in the production program of this ball valve made of plastic, adopt spheroid and the disposable integral body of making of valve rod, the integral type spool that promptly adopts valve rod and valve ball promptly to be connected to one in advance, whole spheroid and part valve rod parcel by the injection-moulded plastic valve body with this integral type spool constitute ball valve.This technological scheme also is that also one of realistic plan is the most generally used in existing ball valve made of plastic production, this scheme can allow preparation process simplification, the number of spare parts of ball valve made of plastic reduce, and does not exist above-mentioned because of breaking away from the problem that causes the ball valve malfunctioning switch between valve rod and the valve ball.But the defective of this scheme also is a technical barrier of puzzled for a long time ball valve made of plastic industry, and promptly the plastics valve body is held the problem of power excessive (corresponding kinetic friction force when having caused relative movement between the two is excessive) tightly to valve ball.Anatomize as can be seen, it is owing to the reason of following two aspects produces that above-mentioned plastics valve body is held the excessive problem of power tightly to valve ball: 1., in this ball valve made of plastic, do not have the valve ball seat that setting separately adapts with the valve ball sphere and constitutes sealing pair, when ball valve is in closed condition, the surface that relies on the valve ball of the inwall of plastics valve body and integral type spool to adapt fully to constitute sealing pair with the outer surface of valve ball, this just requires when making valve body injection mould and injection moulding valve body, must allow after the moulding the plastics valve interior surface can and the valve ball outer surface between closely fit, and, this fitting tightly is large-area fitting tightly between a kind of valve interior surface and the valve ball outer surface, and be not to be that the common secondary needed annular of annular seal is fitted (for ball valve, only needing to form a kind of annular seal pair when it is closed).Large-arealy fit tightly correspondingly with above-mentioned, the kinetic friction force between valve body and the valve ball significantly and unnecessarily increases, thereby causes the valve core rotation difficulty.2., when making the plastics valve body in the mode of hot-melting and injection-molding, in order to realize that large-area between above-mentioned valve interior surface and the valve ball outer surface fits tightly and constitute sealing pair, this just just need make in the valve interior wall of the valve body of molding and forming and valve ball outer surface in fit-state, but, after hot-melting and injection-molding is finished, the plastic valve cognition of institute's moulding produces certain contraction because of cooling off gradually, and this contraction can strengthen the hold power of valve body to spool, and the corresponding inner chamber of plastics valve body and the frictional force between the valve ball outer surface of making further increases, make that the switch of ball valve is more inconvenient, even the very phenomenon of difficulty of integral type valve core rotation occurs.Those skilled in the art is very clear, and under situation about adopting with a kind of plastic materials, the bore of the plastics valve body of made is big more, and then the contraction that is produced in the cooling procedure of plastics valve body after hot-melting and injection-molding is finished is big more.Therefore, this scheme can only adopt the less relatively igelite of shrinkage to produce small-bore ball valve made of plastic (can not with the ball valve made of plastic of this plastic materials production larger caliber).When the plastics valve body adopts just bigger this plastic materials of polyethylene of shrinkage itself, not only be difficult to produce bigbore large-scale ball valve made of plastic, the small-bore small plastic ball valve of company can not be made.
(C), as the production program of No. 03116707.1 disclosed valve rod integral type ball valve of Chinese invention patent, the valve rod integral type ball valve that this scheme provides comprises valve body, spool, valve rod and handle, valve rod and spool are connected as a single entity, spool is positioned at valve body, the outer end of valve rod is stretched out valve body and is connected with handle, between valve rod and valve body, be provided with sealing configuration, be provided with valve seat between spool and the valve body, described valve body is made up of two symmetrical valve gaps of body and body both sides, links by screw thread between valve gap and the body.In this product, at an end of the close spool of valve gap valve seat is housed, by valve gap valve seat and spool are compressed, when spool was in closed condition, the surface of spool and valve seat promptly constituted sealing pair.This production scheme has avoided breaking away between valve rod and the valve ball problem that causes the ball valve malfunctioning switch.The making method of this product is: produce body, integral type spool, two valve gaps and two valve seats respectively earlier, the body of then the integral type spool being packed into is assemblied in valve gap and valve seat on the body again, thereby constitutes a kind of fabricated valve rod integral type ball valve.As described in the specification of this patent, the valve body of this product is a body and two three block structures that valve gap is combined that adopt.Simultaneously, pack in the body for the ease of the valve rod that will be connected as a single entity and spool, the through hole that the aperture of body and valve gap connecting place and body upper valve rod pass the place is bigger.In this patent documentation, valve seat only has been described by polytetrafluoroethylmaterial material, and the material of remaining part does not limit all.According to the understanding of claimant to its patent specification and Figure of description thereof, except that seal element, the material of remaining part all should be metallic material in this product, and promptly this product is a kind of metal ball-valve, and its body, valve gap and integral type spool are all made by metallic material.Can say so, this product does not carry out preferably the Manufacturing material of body, valve gap and integral type spool yet.Certainly, we also can make such hypothesis for the time being: promptly the remaining part of this product is all made by plastic materials, that is to say, this product is a kind of ball valve made of plastic.But, on the basis of this hypothesis, this ball valve made of plastic still following defective can occur: 1., because the aperture of its body and valve gap connecting place and the through hole that the body upper valve rod passes the place are big (as described above, this is to pack in the body for the ease of the valve rod that will be connected as a single entity and spool), large through-hole on the body just exists the redundant space of a large portion and need fill, so just caused the waste of material when making valve body, simultaneously, compare with the ball valve of existing other identical inside nominal diameters (DN), above-mentioned excessive through hole also can make the profile of valve body excessive, thereby caused disadvantage inconvenient and that Applicable scope narrows down is installed.2., in this product, between body and two valve gaps for being threaded, because plastic materials has creep properties, when body and two valve gaps all adopt plastic materials to make, being threaded between body and two valve gaps will occur loosening in long-term using process naturally, thereby the valve body that makes these three formula split types produces seepage (considering that from this angle this product also is not suitable for being made into ball valve made of plastic).
In sum, existing ball valve all exists defective, thereby is badly in need of providing a kind of novel ball valve made of plastic.
Summary of the invention
Purpose of the present invention promptly is at above-mentioned existing ball valve, especially improve at the structure of No. 03116707.1 disclosed valve rod integral type ball valve of Chinese invention patent, a kind of long service life, switch make things convenient for to provide, the rotation friction of valve ball is little, be convenient to fabrication and processing, save manufactured materials and the extensive ball valve made of plastic of Applicable scope.
Ball valve made of plastic of the present invention comprises that inside has the integral type spool that the valve body of runner, valve ball seat and valve rod and valve ball connect as one in advance, the valve ball of described integral type spool is positioned at valve body, the valve rod of described integral type spool passes valve body, the valve ball of described valve ball seat and integral type spool adapts, it is characterized in that: described valve body is the plastics valve body, and be provided with the plastics valve gap that one or two has through hole, described plastics valve gap is mutually bonding with the plastics valve body, and the runner in the through hole of described plastics valve gap and the plastics valve body is connected.
Need to prove: for ball valve, be provided with runner on the valve ball, this belongs to known prior art.And valve ball is arranged in the valve body, so, other runner section that no matter in the plastics valve body, whether communicates with this runner in addition (refering in particular to the runner section of extending herein) to valve body entry and exit direction, we all think to have runner in the inside of plastics valve body, and under the situation that is provided with the plastics valve gap, the through hole of described plastics valve gap just should be connected with the runner in the plastics valve body.
In the present invention, valve rod and valve ball can be made by metallic material, also can wait other material by plastics or pottery, also can also make valve rod and valve ball respectively with two kinds of different materials.In addition, said valve rod and valve ball connect as one in advance and generally include following two kinds of situations among the present invention:
A, valve body and valve ball are made respectively, and mode such as connect by link then or bonding is connected as a single entity valve rod and valve ball;
B, by casting, machine cut processing or fire or thermoplastic shaping modes such as (corresponding respectively to the integral type spool that metal, pottery and plastic materials are made) directly is made as one once with valve rod and valve ball.
In the present invention, mutually bonding two kinds of situation: a, plastics valve gap and the plastics valve body directly bonding (bonding or hot melt adhesion of tackiness agent or ultrasound are bonding) of having comprised of said plastics valve gap and plastics valve body; Realize bonding (bonding or hot melt adhesion of tackiness agent or ultrasound are bonding) indirectly by link between b, plastics valve gap and the plastics valve body.
Between plastics valve gap and plastics valve body, adopt directly when bonding, can allow the two be that end face is bonding or spigot and socket type is bonding.When the two is end face when bonding, should the bonding end face that cooperatively interact be set respectively on described plastics valve gap and plastics valve body, allow the above-mentioned bonding end face of described plastics valve gap and plastics valve body mutually bonding then.Certainly can also allow a part and the plastics valve body of plastics valve gap bonding, another part is connected by modes such as screw threads with the plastics valve body, consider from the angle of being convenient to make, special recommendation of the present invention allow described plastics valve gap and plastics valve body bonding for the thermofusible spigot formula bonding.
With regard to the present invention, when a plastics valve gap was set, the through hole of this plastics valve gap was connected with an end of the runner of plastics valve body, and when two plastics valve gaps were set, the through hole of two plastics valve gaps was connected with the two ends of the runner of plastics valve body respectively.
Following technological scheme is adopted in special recommendation of the present invention: the valve ball of promptly described integral type spool is wherein pre-buried when the plastic valve body heat is molded, and is limited in the valve ball in the plastics valve body after the plastic valve body heat is molded.
The present invention also recommends: allow the valve ball of described integral type spool be the plastics valve ball, the valve rod of described integral type spool is the plastics valve rod, and the plastics valve ball of described integral type spool and plastics valve rod are thermoplastic shaping and interconnect the integral type plastics spool that constitutes in the thermoplastic shaping process.
Certainly, consider that from the angle of the intensity that increases the integral type spool the present invention also recommends following scheme: promptly above-mentioned integral type spool is metal---the plastics compound integral spool that is made of jointly metal frame and plastic packets coating that this metal frame is coated.
In the present invention, described plastic valve both covered can be provided with the valve ball seat separately, also the valve ball seat can be set separately, promptly can allow the extension part of plastics valve gap serve as the described valve ball of valve ball seat supports.When the valve ball seat was set separately, described valve ball seat can be one, also can be two.Under a kind of situation in back, described two valve ball seats should be separately positioned on the valve ball both sides of integral type spool, and allow a valve ball seat be positioned at plastic valve at least to cover.
Obviously, following situation can also occur in the present invention: promptly described valve ball seat and plastics valve gap are two, cover and described two valve ball seats lay respectively at described two plastic valves, and described two plastics valve gaps lay respectively at the valve ball both sides of integral type spool.
In the present invention, recommend to adopt polythene material to make the plastics valve body, still, the material that the present invention will not make the plastics valve body only is defined in polythene material.Simultaneously, above-mentioned ball valve made of plastic valve body also can be the ball valve made of plastic valve body that inside has the skeleton of metal or other material formation.
In addition, can above-mentioned plastic valve in the present invention cover the annular sealing surface that the sphere with the plastics valve ball of integral type plastics spool adapts is set, allow the sphere formation sealing pair of plastics valve ball of described annular sealing surface and integral type plastics spool.Like this, itself has just served as the valve ball seat above-mentioned annular sealing surface, and promptly annular sealing surface is the valve ball seat of independent setting noted earlier, also is that the sphere of the plastics valve ball of described valve ball seat and integral type plastics spool constitutes sealing pair.
In order to strengthen the sealing between valve rod and the plastics valve body, be provided with that at least one is wherein pre-buried when the plastic valve body heat is molded on can described plastics valve body in the present invention, and after the plastic valve body heat is molded, be mounted in the stuffing box inserts on the plastics valve body.The inner space that described stuffing box inserts both can be positioned at the plastics valve body with the plastics valve ball of integral type plastics spool connects, also can allow the stuffing box inserts partly be mounted on the plastics valve body, the inner space that is positioned at the plastics valve body with the plastics valve ball of integral type plastics spool does not connect, can also allow the stuffing box inserts all be mounted on the plastics valve body, but still the inner space that is not positioned at the plastics valve body with the plastics valve ball of integral type plastics spool connect.
In order to realize the present invention, can easily the plastic valve system be made " the plastics valve body that contains the integral type spool in advance ", herein, said " the plastics valve body that contains the integral type spool in advance " is meant the plastics valve body of an end that links to each other with this valve ball of the valve ball that just is coated with the integral type spool when plastic valve is body formed and valve rod, before plastic valve is body formed, just an end that links to each other with this valve ball of the valve ball of above-mentioned integral type spool and valve rod is embedded within the shaping die of plastics valve body, when plastic valve is body formed and after the moulding, the valve ball of above-mentioned integral type spool and an end that links to each other with this valve ball of valve rod have just been contained in this plastics valve body.
A kind ofly compare with polyvinyl plastic ball valve and packaging method thereof with Chinese patent application number 03153661.1 is disclosed with burying, a kind ofly do not exist spool in valve body, to rotate the problem of difficulty with polyvinyl plastic ball valve and packaging method thereof though Chinese patent application number 03153661.1 is disclosed with burying, but this product is valve rod and valve ball to be made then respectively assemble in valve body, can bring the hidden danger that comes off between valve rod and the valve ball inevitably, and the integral type spool that the present invention adopts valve rod to fixedly connected with valve ball has thoroughly solved the problem that comes off between above-mentioned valve rod and the valve ball.
In the present invention, owing to be provided with the plastics valve gap especially, can by this plastics valve gap form or modulating valve ball seat and valve ball outer surface between the ring packing pair, corresponding with it, also just no longer need to fit tightly and constitute sealing pair by the large size between valve interior surface and the valve ball outer surface, in this case, local contacting (can have the gap this moment between the two) not only can only be arranged between the sphere of the inwall of ball valve made of plastic valve body and the valve ball of integral type spool, and can allow the two not contact fully.
So, No. 92244526.5 disclosed integrated type ball valve made of plastic of ball valve made of plastic of the present invention and Chinese utility model patent are compared, though the integral body that No. 92244526.5 disclosed integrated type ball valve made of plastic of Chinese utility model patent also adopt spheroid and valve rod once to make, solved the hidden danger that comes off between valve rod and the valve ball, but the one-time formed valve body of this product tightly is wrapped in the valve ball of integral type spool wherein, caused frictional force excessive, the problem of valve core rotation difficulty, switch inconvenience.And the mode that the plastics valve gap is set on the plastics valve body that the present invention adopts can constitute a kind of ring packing pair by the applying between valve ball seat and the valve ball outer surface, constitutes sealing pair and no longer need large size between valve body and the valve ball to fit tightly.Even still have certain part to contact between valve body and the valve ball, the area of contact of valve body and valve ball also can significantly reduce, thereby the kinetic friction force between valve body and the valve ball is reduced significantly.Still more, can also allow not contact (as described above, no longer need constitute sealing pair) fully between valve body and the valve ball, promptly can allow have tangible gap between the two by the surface of the two, when in this case, valve ball rotates just fully not can and valve body between produce kinetic friction force.Promptly when handling the integral type spool, only need to overcome the sphere of valve ball and the kinetic friction force between the annular sealing surface on the valve ball seat.It is also important that: owing to no longer need the inwall of valve body and valve ball outer surface in the state of fitting tightly, can only locally contact between the two, and even can have tangible gap, therefore, can pass through design for Injection Mould, allow the plastics valve body in the hot-melting and injection-molding forming process, only fit gently or even not fit fully with the part of valve ball.Like this, after hot-melting and injection-molding was finished, though the plastics valve body of institute's moulding still can produce certain contraction because of cooling off gradually, different with aforementioned existing product was the power of holding tightly that this contraction can't be excessive to the spool hyperplasia.Under local situation of fitting gently between plastics valve body and the valve ball, cool off gradually and after producing certain contraction at the plastics valve body, can also be by regulating the embedding degree of plastics valve gap, that is be to regulate the applying tightness that the tightening degree of itself and ball surface is regulated plastics valve body and valve ball part.And have between valve body and the valve ball under the situation in tangible gap, that is between valve body and the valve ball under the complete discontiguous situation, valve body is not then held power tightly fully to spool.Therefore, technological scheme of the present invention has solved the plastics valve body fully the valve ball of integral type spool has been held tightly the excessive problem of power, and then has thoroughly solved a valve core rotation difficult technologies difficult problem.
In addition, compare with the valve rod integral type ball valve of No. 03116707.1, application for a patent for invention, the present invention's employing mode of bonding plastics valve gap on the plastics valve body solves the integral type spool rotates difficulty in valve body problem, the valve rod integral type ball valve that No. 03116707.1, application for a patent for invention then adopts and allows a body and two three combined block structures of valve gap piece together valve body, and the mode that allows valve gap be threaded with valve body solves the technical problem that is fitted into valve body the integral type spool later stage.As previously mentioned, if this product is the ball valve made of plastic of being made by plastic materials, then can cause the waste of material when making valve body, and can make the profile of valve body excessive, bring disadvantage inconvenient and that Applicable scope narrows down is installed, simultaneously, also can increase the workload of fabrication and processing and assembling work, and the screw connection point that is easy between the body of three split type valve bodies and two valve gaps produces seepage.Contrast with it, product of the present invention is stated the plastics valve body to be thermoplastic shaping and to carry out bonding plastics valve body with valve gap, thereby has overcome the above-mentioned defective of this product.Simultaneously, the present invention can allow the valve ball of integral type spool wherein pre-buried when the plastic valve body heat is molded, and after the plastic valve body heat is molded, be completely restricted within the plastics valve body and can not in the plastics valve body, deviate from, both simplified the assembly process of product, make full use of the characteristics of being convenient to disposable thermoplastic in the plastics valve body again, help simplifying the integral manufacturing process of ball valve.
Therefore, ball valve made of plastic of the present invention had both solved the difficult problem that comes off between valve rod and the valve ball, solved the excessive problem of frictional force between plastics valve body and the valve ball again simultaneously, allow the valve ball of ball valve made of plastic rotate flexibly, switch is convenient and long service life, in addition, technological scheme of the present invention also helps the using scope of simplifying working process, saving production material, preventing valve body generation seepage, expansion ball valve made of plastic, is convenient to produce bigbore ball valve made of plastic.So the invention solves long-term puzzled ball valve made of plastic production industry can not be with these two technical barrier that problem solves simultaneously of excessive friction between coming off between valve rod and the valve ball, plastics valve body and the valve ball.The technology used in the present invention means are non-obvious, and have obvious improvement with respect to prior art.
In the ball valve made of plastic of the present invention, the sealing surface that adapts with the sphere of valve ball can be arranged on the valve ball seat usually, promptly with the sphere looping sealing pair of valve ball, but on the surface that the valve ball with the integral type spool that also still above-mentioned sealing surface can be arranged on where necessary, the plastics valve interior wall adapts.When having two valve ball seats in the plastics valve body, the described sealing surface that adapts with sphere valve ball can only be arranged on one of them of two valve ball seats, this is commonly referred to the single face sealing in ball valve manufacturing field, promptly can allow another valve ball seat that sealing surface is not set only play the effect of the valve ball of integral type spool being supported the location.Certainly, also can allow two valve ball seats be provided with the sealing surface that the sphere with valve ball adapts simultaneously, this is commonly referred to dual face seals in ball valve manufacturing field.
In ball valve made of plastic of the present invention, because a plastics valve gap can be set respectively in the both sides of plastics valve body, and allow and have tangible gap between the outer surface of the internal surface of valve body and valve ball, this just can eliminate the friction between integral type spool and the valve interior wall fully, make the rotation of integral type spool more flexible, and can reduce difficulty of processing.
As previously mentioned, integral type spool among the present invention can be plastics integral type spool, promptly adopt the plastics valve ball, and allow the valve rod be the plastics valve rod, make the plastics valve ball of integral type spool and plastics valve rod disposable thermal is molded and interconnect and the integral type plastics spool that constitutes in the thermoplastic shaping process.
Also as described above, in the present invention, the integral type spool also can be the metal integral type spool that is obtained through casting or machine cut processing by metallic material, simultaneously, it can also be to add metal---the plastics compound integral spool that the plastic packets coating of coating constitutes jointly by metal frame with this metal bone.
In the present invention, can also increase stub (tube) on the described plastics valve body, connect to make things convenient for the later stage pipeline.
The working procedure of the ball valve made of plastic among the present invention is identical with existing ball valve made of plastic working procedure, repeats no more herein.
Compared with the aforementioned existing similar products, ball valve made of plastic of the present invention had both solved the problem that comes off between valve rod and the valve ball, having solved the plastics valve body again, that the valve ball of integral type spool is held tightly power is excessive and cause a valve core rotation difficult technologies difficult problem, and the profile that can not make valve body is excessive and cause the waste of Manufacturing material, can not bring inconvenience is installed, Applicable scope narrows down and valve body produces the disadvantage of seepage.Therefore, technological scheme of the present invention has solved the technical barrier that long-term puzzlement ball valve made of plastic is produced, and it is more flexible to allow valve ball in the ball valve made of plastic rotate, and allows the ball valve product have long working life, thereby has use value.Simultaneously, in ball valve made of plastic of the present invention, the valve ball of integral type spool has just been inserted in the plastics valve body in the process of injection-molded plastic valve body, rather than after finishing, the plastic valve system installs again, this has just simplified preparation process, help reducing production costs, be suitable for mass industrialized production.In addition, because product of the present invention is influenced by the shrinkage of valve body Manufacturing material no longer, therefore can use various plastic materialss, ball valve made of plastic described in the present invention of polypropylene, polythene, PVC, ABS or the like processing and fabricating, and production can be become bigbore large-scale ball valve made of plastic.
Content of the present invention further illustrates with the following Examples, but content of the present invention is not limited only to content related among the embodiment.
Description of drawings
Fig. 1 is the structural representation of ball valve made of plastic among the embodiment 1.
Fig. 2 is that ball valve made of plastic removes structural representation behind the valve gap among Fig. 1.
Fig. 3 is the structural representation of ball valve made of plastic among the embodiment 2.
Fig. 4 is that ball valve made of plastic removes structural representation behind the valve gap among Fig. 3.
Fig. 5 is the structural representation of ball valve made of plastic among the embodiment 3.
Fig. 6 is that ball valve made of plastic removes structural representation behind the valve gap among Fig. 5.
Fig. 7 is the structural representation of ball valve made of plastic among the embodiment 4.
Fig. 8 is that ball valve made of plastic removes structural representation behind the valve gap among Fig. 7.
Fig. 9 is the structural representation of ball valve made of plastic among the embodiment 5.
Figure 10 is that ball valve made of plastic removes structural representation behind the valve gap among Fig. 9.
Figure 11 is the structural representation of ball valve made of plastic among the embodiment 6.
Figure 12 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 11.
Figure 13 is the structural representation of ball valve made of plastic among the embodiment 7.
Figure 14 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 13.
Figure 15 is the structural representation of ball valve made of plastic among the embodiment 8.
Figure 16 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 15.
Figure 17 is the structural representation of ball valve made of plastic among the embodiment 9.
Figure 18 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 17.
Figure 19 is the structural representation of ball valve made of plastic among the embodiment 10.
Figure 20 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 19.
Figure 21 is the structural representation of ball valve made of plastic among the embodiment 11.
Figure 22 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 21.
Figure 23 is the structural representation of ball valve made of plastic among the embodiment 12.
Figure 24 is that ball valve made of plastic removes structural representation behind the valve gap among Figure 23.
Embodiment
Embodiment 1: shown in Fig. 1～2, the ball valve made of plastic of present embodiment comprises that inside has the valve body of runner, the integral type spool 4 that valve ball seat 1 and valve rod 2 and valve ball 3 connect as one in advance, the valve ball 3 of described integral type spool is positioned at valve body, the valve rod 2 of described integral type spool passes valve body, described valve ball seat 1 adapts with the valve ball 3 of integral type spool, it is characterized in that: described valve body is a plastics valve body 5, and be provided with a plastics valve gap 6 with through hole, described plastics valve gap 6 is mutually bonding with plastics valve body 5, and the runner in the through hole of described plastics valve gap 6 and the plastics valve body 5 is connected.
The valve gap of plastics described in the present embodiment 6 is that the thermofusible spigot formula is bonding with the bonding of plastics valve body 5.
The valve ball 3 of the spool of integral type described in the present embodiment is the plastics valve ball, the valve rod 2 of described integral type spool is the plastics valve rod, and the plastics valve ball of described integral type spool and plastics valve rod are thermoplastic shaping and interconnect the integral type plastics spool 7 that constitutes in the thermoplastic shaping process.The valve ball 3 of described integral type plastics spool is wherein pre-buried when plastics valve body 5 thermoplastic shapings, and is limited in the valve ball 3 in the plastics valve body 5 behind plastics valve body 5 thermoplastic shapings.
Embodiment 2: shown in Fig. 3～4, present embodiment is similar to embodiment 1, different is has the annular sealing surface that the sphere with the valve ball 3 of integral type spool adapts on the described plastics valve gap 6, the sphere of the valve ball 3 of described annular sealing surface and integral type spool constitutes sealing pair.Itself has just served as valve ball seat 1 annular sealing surface in the present embodiment, be that annular sealing surface is the valve ball seat 1 that is provided with separately, described valve ball seat 1 is two, described two valve ball seats 1 are separately positioned on valve ball 3 both sides of integral type spool, in the present embodiment, one of them valve ball seat 1 is positioned on the plastics valve gap 6.
The valve body of plastics described in the present embodiment 5 is plastics valve bodies that polythene material is made.
Embodiment 3: shown in Fig. 5～6, present embodiment is similar to embodiment 2, and different is that described valve ball seat 1 is one, and described valve ball seat 1 is positioned on the plastics valve gap 6.
Embodiment 4: shown in Fig. 7～8, present embodiment is similar to embodiment 2, and different is that described valve ball seat 1 is one, and described valve ball seat 1 is positioned on plastics valve body 5 inwalls of valve ball 3 one sides of the relative integral type spool of plastics valve gap 6.
Embodiment 5: shown in Fig. 9～10, present embodiment is similar to embodiment 2, has between the sphere of the inwall of the plastics valve body 5 of different is described ball valve made of plastic and the valve ball 3 of integral type spool to make the two gap that is in separated state 8.
Embodiment 6: shown in Figure 11～12, present embodiment is similar to embodiment 5, and different is that described valve ball seat 1 is one, and described valve ball seat 1 is positioned on the plastics valve gap 6.
Embodiment 7: shown in Figure 13～14, present embodiment is similar to embodiment 5, and different is that described valve ball seat 1 is one, and described valve ball seat 1 is positioned on plastics valve body 5 inwalls of valve ball 3 one sides of the relative integral type spool of plastics valve gap 6.
Embodiment 8: shown in Figure 15～16, present embodiment is similar to embodiment 1, different is that described valve ball seat 1 and plastics valve gap 6 are two, and described two valve ball seats 1 lay respectively on described two plastics valve gaps 6, and described two plastics valve gaps 6 lay respectively at valve ball 3 both sides of integral type spool.
Embodiment 9: shown in Figure 17～18, present embodiment is similar to embodiment 8, different is wherein pre-buried when also being provided with at plastics valve body 5 thermoplastic shapings on the described plastics valve body 5, and is mounted in the stuffing box inserts 9 on the plastics valve body 5 behind plastics valve body 5 thermoplastic shapings.The inner space that the plastics valve ball 3 of inserts of stuffing box described in the present embodiment 9 and integral type plastics spool 7 is positioned at plastics valve body 5 connects.
Embodiment 10: shown in Figure 19～20, present embodiment is similar to embodiment 9, the stuffing box inserts 9 that different is in the present embodiment all is mounted on the plastics valve body 5, but the inner space that is not positioned at plastics valve body 5 with the plastics valve ball 3 of integral type plastics spool 7 connects.
Embodiment 11: shown in Figure 21～22, present embodiment is similar to embodiment 9, and the integral type spool that different is in the present embodiment is metal---the plastics compound integral spool 12 that is made of jointly metal frame 10 and plastic packets coating 11 that this metal frame 10 is coated.
Embodiment 12: shown in Figure 23～24, present embodiment is similar to embodiment 2, different is that described valve ball seat 1 of present embodiment and plastics valve gap 6 are two, a part and plastics valve body 5 end faces of the valve gap of plastics described in the present embodiment 6 are bonding, and another part of described plastics valve gap 6 is connected by screw thread 13 with plastics valve body 5.
Claims (9)
1, a kind of ball valve made of plastic, comprise that inside has the valve body of runner, the integral type spool that valve ball seat and valve rod and valve ball connect as one in advance, the valve ball of described integral type spool is positioned at valve body, the valve rod of described integral type spool passes valve body, the valve ball of described valve ball seat and integral type spool adapts, it is characterized in that: described valve body is the plastics valve body, and be provided with the plastics valve gap that one or two has through hole, described plastics valve gap is mutually bonding with the plastics valve body, runner in the through hole of described plastics valve gap and the plastics valve body is connected, the valve ball of described integral type spool is wherein pre-buried when the plastic valve body heat is molded, and is limited in the valve ball in the plastics valve body after the plastic valve body heat is molded.
2, ball valve made of plastic as claimed in claim 1 is characterized in that: the bonding of described plastics valve gap and plastics valve body is that the thermofusible spigot formula is bonding.
3, ball valve made of plastic as claimed in claim 1 is characterized in that: described valve ball seat is two, and described two valve ball seats are separately positioned on the valve ball both sides of integral type spool, and at least one valve ball seat is positioned at plastic valve and covers.
4, ball valve made of plastic as claimed in claim 1 is characterized in that: described valve ball seat and plastics valve gap are two, and described two valve ball seats lay respectively at described two plastic valves and cover, and described two plastics valve gaps lay respectively at the valve ball both sides of integral type spool.
5, ball valve made of plastic as claimed in claim 1 is characterized in that: described plastics valve body is the plastics valve body that polythene material is made.
6, ball valve made of plastic as claimed in claim 1, it is characterized in that: the valve ball of described integral type spool is the plastics valve ball, the valve rod of described integral type spool is the plastics valve rod, and the plastics valve ball of described integral type spool and plastics valve rod are thermoplastic shaping and interconnect the integral type plastics spool that constitutes in the thermoplastic shaping process.
7, ball valve made of plastic as claimed in claim 1 is characterized in that: cover at described plastic valve and have the annular sealing surface that the sphere with the valve ball of integral type spool adapts, the sphere of the valve ball of described annular sealing surface and integral type spool constitutes sealing pair.
8, ball valve made of plastic as claimed in claim 1 is characterized in that: also be provided with when the plastic valve body heat is molded wherein pre-buriedly on the described plastics valve body, and be mounted in stuffing box inserts on the plastics valve body after the plastic valve body heat is molded.
9, as claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 described ball valve made of plastic, it is characterized in that: have between the sphere of the inwall of the plastics valve body of described ball valve made of plastic and the valve ball of integral type spool and make the two be in the gap of separated state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101015428A CN100501209C (en) | 2006-04-26 | 2007-04-25 | Plastic ball valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610020794 | 2006-04-26 | ||
| CN200610020794.3 | 2006-04-26 | ||
| CNB2007101015428A CN100501209C (en) | 2006-04-26 | 2007-04-25 | Plastic ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101059178A CN101059178A (en) | 2007-10-24 |
| CN100501209C true CN100501209C (en) | 2009-06-17 |
Family
ID=38865427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101015428A Expired - Fee Related CN100501209C (en) | 2006-04-26 | 2007-04-25 | Plastic ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100501209C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107600750A (en) * | 2017-10-18 | 2018-01-19 | 宁夏洁宁新能源有限公司 | The cloth bucket valve of anti-particle obstruction |
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2007
- 2007-04-25 CN CNB2007101015428A patent/CN100501209C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101059178A (en) | 2007-10-24 |
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