CN1296644C - Plastic stop valve - Google Patents
Plastic stop valve Download PDFInfo
- Publication number
- CN1296644C CN1296644C CNB2004100219621A CN200410021962A CN1296644C CN 1296644 C CN1296644 C CN 1296644C CN B2004100219621 A CNB2004100219621 A CN B2004100219621A CN 200410021962 A CN200410021962 A CN 200410021962A CN 1296644 C CN1296644 C CN 1296644C
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- valve
- valve gap
- plastic
- sidewall
- plastics
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Abstract
The present invention relates to a plastic stop valve which comprises a valve cover, a valve flap, a valve handle and a plastic valve body, wherein the plastic valve body is connected with the valve cover by a valve cover connecting structure; the valve cover is at least composed of a plastic valve cover basal body and a valve handle nut embedding piece of which the circumference is embedded in the plastic valve cover basal body; a valve seat is arranged in the plastic valve body and is provided with a valve seat opening; the valve seat opening corresponds to the valve flap which is positioned on the bottom of the valve handle; both ends of the plastic valve body are respectively provided with an inflow inlet and an outflow outlet which are communicated with the valve seat opening; the top of the plastic valve body is provided with a valve cover connecting port which is matched with the valve cover. The present invention is characterized in that the waist of the side wall of the valve cover connecting port is provided with a concave part, and the side wall of the valve cover connecting port is provided with a groove which penetrates into the concave part from an inlet end of the connecting port. The side wall of the valve cover is provided with a convex part, and the convex part of the side wall of the valve cover is matched with the concave part of the side wall of the valve cover connecting port to form the valve cover connecting structure.
Description
Technical field
The present invention relates to a kind of plastic stop valve.
Background technique
China utility model patent No. 02284141.5 a kind of stop valve is disclosed, this stop valve comprises valve body, valve seat (being commonly referred to valve gap) and valve rod, valve body be embedded with one the band internal thread metal insert, its valve seat is combined by seat core and pedestal.In this product, the metal insert in the valve body is a kind of valve gap link, and it is used for and being threaded of valve seat (being valve gap).But, if the structure of this product is used for plastic stop valve (being the stop valve that valve body is made by plastic materials), then when the external diameter of the plastic tube that is connected with plastic stop valve surpasses 63 millimeters, the cavity volume of valve body will be bigger, the pressure that valve gap bore also can be bigger, the above-mentioned corresponding increase of the required strength of bearing of metal insert that is embedded on the plastics valve body and is used for fastening valve gap, the not enough problem of join strength might appear in the joint between itself and the plastics valve body, and influence the quality and the working life of entire product thus.Therefore, above-mentioned existing product awaits improving.
Summary of the invention
The objective of the invention is the head cover engaging structure of above-mentioned existing product is improved, a kind of plastic stop valve that especially is suitable for being made into the larger caliber product is provided.
Plastic stop valve of the present invention has valve gap, flap, valve rod and plastics valve body, be connected through head cover engaging structure between described plastics valve body and the valve gap, at least the Stem Mut inserts on this plastics valve gap matrix constitutes described valve gap by plastics valve gap matrix and peripheral build-in, on the Stem Mut inserts, offer screw, described valve stem casing places in this screw, outside thread on the described valve rod matches with the internal thread of this screw and constitutes kinematic pair, in the plastics valve body, be provided with valve seat, described valve seat has the valve seat opening, described valve seat opening is relative with the flap that is positioned at stem bottom, described plastics two ends of valve body has the inflow port that is connected with the valve seat opening respectively and goes out head piece, the top of described plastics valve body has the valve gap connection mouth that matches with valve gap, the waist that it is characterized in that the sidewall of described valve gap connection mouth is provided with reentrant part, sidewall at the valve gap connection mouth is provided with the groove that is led to the female portion by the entrance point of this connection mouth, sidewall at valve gap is provided with bump, and the bump of described valve gap sidewall matches with the reentrant part of described valve gap connection mouth sidewall and constitutes head cover engaging structure.
When adopting technological scheme of the present invention, can utilize the above-mentioned groove that leads to reentrant part, allow the bump that is provided with on the valve gap sidewall arrive the reentrant part that is positioned at valve gap connection mouth sidewall, valve gap is rotated to an angle, make the bump of its sidewall enter the non-groove position of valve gap connection mouth sidewall reentrant part, the upper and lower wall at the non-groove position of this reentrant part can carry out spacing to the bump of valve gap, thereby realizes being connected of valve gap and valve body.
In above-mentioned linkage structure, come down to mutual fastening by the reentrant part of bump on the valve gap and valve gap connection mouth sidewall, the realization valve gap is connected with valve body, and above-mentioned groove role of leading to reentrant part is a reentrant part of being convenient to the bump on the valve gap is imported valve gap connection mouth sidewall.Because the bump on the valve gap and the reentrant part of valve gap connection mouth sidewall all can directly adopt comparatively cheap plastic materials to make, the two position, place all can make comparatively thick greatly, thereby solved the not enough problem of joint join strength of valve gap and valve body in the existing product.
In addition,, can also in the plastic basis material of the valve gap connection mouth sidewall of plastics valve body, set up metal frame, with the join strength of the joint of further increase valve gap and valve body with regard to the present invention.
In the present invention, the reentrant part of above-mentioned valve gap connection mouth sidewall can be the circular reentrant part arranged along the connection mouth sidewall or non-annular reentrant part (as only being the reentrant part of the part of circular reentrant part or other section configuration).The bump of valve gap sidewall can be one, also can be more than two or two, and is corresponding with it, and above-mentioned groove number of leading to reentrant part also can be one, more than two or two.In using the process of plastic stop valve of the present invention, when needs unload bottom flange and overhaul, can rotate valve gap, the bump of its sidewall is return back in the above-mentioned groove that leads to reentrant part, thereby valve gap can be unloaded.In addition, cause valve gap loosening in order to prevent valve gap from the using process of valve, returning back to the groove position of reentrant part voluntarily, can also set up defences in the groove interpolation of above-mentioned valve gap connection mouth sidewall and end the rotating stop fixture block of plastics valve gap matrix.Certainly, for the ease of when overhauling valve, taking out the stop fixture block, can also be provided for the hooking structure of hook stop fixture block at the top of this stop fixture block, as similar structure such as hangers or through holes.
In plastic stop valve of the present invention, can between the sidewall of valve gap sidewall and valve gap connection mouth, insert and put seal ring, with the sealing of the connection part of realizing valve body and valve gap.Generally, seal ring can be nested with below the bump of above-mentioned valve gap sidewall.
In the present invention, above-mentioned plastics valve body is actually a kind of valve body of producing based on plastic materials, it both can be a kind of valve body of being made by pure plastic materials, but also can be the valve body (as be provided with the valve body of metal frame in plastic basis material) that different materials is composited.
At least the Stem Mut inserts on this plastics valve gap matrix constitutes valve gap among the present invention by plastics valve gap matrix and peripheral build-in, also that is to say, except that plastics valve gap matrix and Stem Mut inserts, other parts (as stuffing box packing, Gland or other inserts etc.) can also be arranged on valve gap.
For the ease of the making larger caliber, and the area of passage of runner is big, the better plastic stop valve of overall performance of product, matches with above-mentioned improvement project, further improves below product of the present invention can also be done:
At transition inserts and the stuffing box inserts of superimposed successively peripheral build-in on the Stem Mut inserts in plastics valve gap matrix, filler and Gland are set in the stuffing box inserts.Herein, set transition inserts can be one or more, and its material can be identical with the Stem Mut inserts, but also can be different.When the Stem Mut inserts adopt Cuprum alloy or similarly metallic material make, and the transition inserts helps reducing the fabricating cost of product when adopting other comparatively cheap material such as plastics.
Allow valve seat constitute by the valve-seat insert piece that periphery embeds plastics plastics valve body.At this moment, valve-seat insert piece can adopt metal or plastics to make, and is metal or plastic seat inserts.When adopting comparatively wear-resisting metal seat valve inserts, can prevent the wearing and tearing of valve seat location effectively, increase the working life of product.
Valve seat the lower wall setting of right runner be lower than the downward reentrant part of inflow port runner lower wall, and allow the bottom of downward reentrant part constitute by the back cover lid that connects as one with the amalgamation of plastics valve body.This kind structure can increase the runner area of passage at the contiguous position of valve seat significantly, guarantees that plastic stop valve possesses enough inflow-rate of water turbines.
In addition, in the present invention, the inflow port of valve body and go out that head piece can be respectively the flange join type inflow port and flange join type goes out head piece also can be respectively thermofusible spigot formula inflow port and the thermofusible spigot formula goes out head piece.When adopting thermofusible spigot formula inflow port and thermofusible spigot formula to go out head piece, the inwall that can also be respectively goes out head piece in thermofusible spigot formula inflow port and thermofusible spigot formula is provided with electric heating wire, so that the construction and installation of product.
Compared with the aforementioned existing similar products, plastic stop valve of the present invention has solved the not enough problem of joint join strength between valve gap and the plastics valve body effectively, especially is suitable for being made into the plastic stop valve of larger caliber.
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 plastic stop valve among the embodiment 1.
Fig. 2 is the A--A sectional view of Fig. 1.
Fig. 3 is the B--B sectional drawing of Fig. 1.
Fig. 4 is the C--C sectional drawing of Fig. 1.
Fig. 5 is the D--D sectional drawing of Fig. 1.
Fig. 6 is the E--E sectional drawing of Fig. 1.
Fig. 7 is that plastic stop valve sheds B--B position sectional drawing behind the stop fixture block among Fig. 1.
Fig. 8 is that plastic stop valve sheds C--C position sectional drawing behind the stop fixture block among Fig. 1.
Fig. 9 is the valve cover structure schematic representation of plastic stop valve among Fig. 1.
Figure 10 is the plan view of Fig. 9.
Figure 11 is the valve body structure schematic representation of plastic stop valve among Fig. 1.
Figure 12 is the F--F sectional view of Figure 11.
Figure 13 is the plan view of Figure 11.
Figure 14 is the structural representation of plastic stop valve among the embodiment 2.
Figure 15 is the G--G sectional view of Figure 14.
Figure 16 is the valve cover structure schematic representation of plastic stop valve among Figure 14.
Figure 17 is the plan view of Figure 16.
Figure 18 is the valve body structure schematic representation of plastic stop valve among Figure 14.
Figure 19 is the plan view of Figure 18.
Figure 20 is the structural representation of plastic stop valve among the embodiment 3.
Figure 21 is the structural representation of plastic stop valve among the embodiment 4.
Figure 22 is the valve body structure schematic representation of plastic stop valve among Figure 21.
Figure 23 is the plan view of Figure 22.
Figure 24 is the structural representation of metal frame in the plastic stop valve among Figure 21.
Figure 25 is the plan view (partly cut-away) of Figure 24.
Embodiment
Embodiment 1: shown in Fig. 1～13, plastic stop valve in the present embodiment has valve gap, flap 1, valve rod 2 and plastics valve body 3, be connected through head cover engaging structure between described plastics valve body 3 and the valve gap, at least the Stem Mut inserts 5 on this plastics valve gap matrix constitutes described valve gap by plastics valve gap matrix 4 and peripheral build-in, on Stem Mut inserts 5, offer screw, described valve rod 2 is placed in this screw, outside thread on the described valve rod 2 matches with the internal thread of this screw and constitutes kinematic pair, in plastics valve body 3, be provided with valve seat 6, described valve seat 6 has the valve seat opening, described valve seat opening is relative with the flap 1 that is positioned at stem bottom, the two ends of described plastics valve body 3 have the inflow port 7 that is connected with the valve seat opening respectively and go out head piece 8, the top of described plastics valve body 3 has the valve gap connection mouth 9 that matches with valve gap, the waist that it is characterized in that the sidewall of described valve gap connection mouth 9 is provided with reentrant part 10, sidewall at valve gap connection mouth 9 is provided with the groove 11 that is led to the female portion 10 by the entrance point of this connection mouth, sidewall at valve gap is provided with bump 12, and the bump 12 of described valve gap sidewall matches with the reentrant part 10 of described valve gap connection mouth sidewall and constitutes head cover engaging structure.
In the present embodiment, the bump 12 of above-mentioned valve gap sidewall is two, and is corresponding with it, and above-mentioned quantity of leading to the groove 11 of reentrant part also is two.When adopting the technological scheme of present embodiment, can utilize the above-mentioned groove 11 that leads to reentrant part, allow the bump 12 that is provided with on the valve gap sidewall arrive the reentrant part 10 that is positioned at valve gap connection mouth sidewall, valve gap is rotated to an angle, allow the bump 12 of its sidewall enter the non-groove position of valve gap connection mouth sidewall reentrant part 10, the upper and lower wall at the non-groove position of this reentrant part 10 can carry out spacing to the bump 12 of valve gap, thereby realizes being connected of valve gap and valve body 3.In the present embodiment, the reentrant part 10 of above-mentioned valve gap connection mouth sidewall is the circular reentrant part of arranging along the connection mouth sidewall.
Cause valve gap loosening in order to prevent valve gap from returning back to the groove position of reentrant part voluntarily in the using process of valve, present embodiment is inserted with the stop piece in the groove 11 of above-mentioned valve gap connection mouth sidewall.Herein, the stop fixture block that is inserted in the valve gap connection mouth sidewall groove is made of metal perforated plate core 13 and plastic outer layer 14 that this metal perforated plate core is coated, and the upper end of described metal perforated plate core 13 is provided with the hooking structure 15 (this example is through hole) that is used for hook stop fixture block.When maintenance need be taken out the stop fixture block during valve, only need a hook to live this hooking structure 15 and upwards lift and get final product.
Present embodiment is equipped with seal ring 16 below the bump of valve gap sidewall, described seal ring 16 is folded between the sidewall of valve gap sidewall and valve gap connection mouth, with the sealing of the connection part of realizing valve body and valve gap.
In the present embodiment, be superimposed with transition inserts 17 and the stuffing box inserts 18 of peripheral build-in in plastics valve gap matrix 4 on the above-mentioned Stem Mut inserts 5 successively, in stuffing box inserts 18, be provided with filler 19 and Gland 20.Stem Mut inserts 5 in this example adopts Cu alloy material to make, and transition inserts 17 is one, and it adopts plastic materials to make, to reduce the fabricating cost of product.
Above-mentioned inflow port 7 in the present embodiment and go out head piece 8 and be respectively inwall and go out head piece by thermofusible spigot formula inflow port and the thermofusible spigot formula that plastic materials constitutes, this kind helps being connected with the plastic pipe thermofusible spigot into and out of head piece.
In addition, above-mentioned valve seat 6 is made of the valve-seat insert piece that periphery embeds the plastics valve body, and the valve-seat insert piece that is adopted in this example is the metal seat valve inserts.Be provided with after this independently valve-seat insert piece, can make valve body of plastic cut-off valve better, thereby help strengthening the sealability of valve, and increase the working life of product in the wear resistance of valve seat location.
The present embodiment also lower wall of the runner below valve seat 6 is provided with the downward reentrant part 21 that is lower than inflow port runner lower wall, and allow the bottom of this downward reentrant part 21 constitute by the back cover lid 22 that connects as one with the amalgamation of plastics valve body, this structure both can increase the runner area of passage at the contiguous position of valve seat, guarantee that plastic stop valve possesses enough inflow-rate of water turbines, be convenient to the valve body of plastic cut-off valve demoulding of when making, loosing core again.Herein, the peripheral side wall of above-mentioned back cover lid 22 matches to merge with the madial wall of the downward reentrant part 21 of described plastics valve body and fixedlys connected, this Placement can realize (being good with thermofusible spigot especially) by thermofusible spigot or bonding way, thereby has use value.
In order to make the outward appearance of product comparatively attractive in appearance, present embodiment has been set up deckboard 23 at the top of valve gap.
Embodiment 2: shown in Figure 14～19, and similar in the present embodiment to embodiment 1, different is, and the bump 12 of valve gap sidewall is eight in the present embodiment, and is corresponding with it, and above-mentioned quantity of leading to the groove 11 of reentrant part also is eight.Simultaneously, the valve seat 6 in the present embodiment no longer is made of the valve-seat insert piece of periphery embedding plastics valve body, and is directly served as by the plastic basis material on the plastics valve body.
Embodiment 3: as shown in figure 20, the plastic stop valve in the present embodiment is similar to embodiment 2, and different is that present embodiment is provided with electric heating wire 24 in the inflow port 7 of thermofusible spigot formula and the inwall that goes out head piece 8 of thermofusible spigot formula.
Embodiment 4: shown in Figure 21～25, the plastic stop valve in the present embodiment is similar to embodiment 2, and different is that present embodiment is provided with metal frame in the plastic basis material of the valve gap connection mouth sidewall of plastics valve body 3.Herein, set metal frame by be stacked inside and outside metal net shaped pipe 25,26 of cover and backing metal 27, metal force-bearing piece 28 constitutes, backing metal 27 is welded between the inside and outside metal net shaped pipe 25,26, and metal force-bearing piece 28 is welded on the top of inside and outside metal net shaped pipe 25,26.In the injection molding process of plastics valve body, plastic materials can coat above-mentioned metal frame fully.After plastic valve is body formed, this metal frame just further the reinforced plastic valve body at the join strength of valve gap joint.
In addition, the valve seat 6 in the present embodiment still is made of the metal seat valve inserts of periphery embedding plastics valve body, and this point is identical with embodiment 1.
Claims (10)
1, a kind of plastic stop valve, has valve gap, flap, valve rod and plastics valve body, be connected through head cover engaging structure between described plastics valve body and the valve gap, at least the Stem Mut inserts on this plastics valve gap matrix constitutes described valve gap by plastics valve gap matrix and peripheral build-in, on the Stem Mut inserts, offer screw, described valve stem casing places in this screw, outside thread on the described valve rod matches with the internal thread of this screw and constitutes kinematic pair, in the plastics valve body, be provided with valve seat, described valve seat has the valve seat opening, described valve seat opening is relative with the flap that is positioned at stem bottom, described plastics two ends of valve body has the inflow port that is connected with the valve seat opening respectively and goes out head piece, the top of described plastics valve body has the valve gap connection mouth that matches with valve gap, the waist that it is characterized in that the sidewall of described valve gap connection mouth is provided with reentrant part, sidewall at the valve gap connection mouth is provided with the groove that is led to the female portion by the entrance point of this connection mouth, sidewall at valve gap is provided with bump, and the bump of described valve gap sidewall matches with the reentrant part of described valve gap connection mouth sidewall and constitutes head cover engaging structure.
2, plastic stop valve as claimed in claim 1 is characterized in that being inserted with the stop piece in the groove of described valve gap connection mouth sidewall.
3, plastic stop valve as claimed in claim 2, it is characterized in that the described stop fixture block that is inserted in the valve gap connection mouth sidewall groove is made of metal perforated plate core and plastic outer layer that this metal perforated plate core is coated, the upper end of described metal perforated plate core is provided with the hooking structure that is used for hook stop fixture block.
4, plastic stop valve as claimed in claim 1 is characterized in that being provided with metal frame in the plastic basis material of the valve gap connection mouth sidewall of plastics valve body.
5, plastic stop valve as claimed in claim 1 is characterized in that being equipped with seal ring below the bump of valve gap sidewall, and described seal ring is folded between the sidewall of valve gap sidewall and valve gap connection mouth.
6, plastic stop valve as claimed in claim 1 is characterized in that being provided with filler and Gland being superimposed with the transition inserts and the stuffing box inserts of peripheral build-in in plastics valve gap matrix on the described Stem Mut inserts successively in the stuffing box inserts.
7, plastic stop valve as claimed in claim 1 is characterized in that described inflow port and goes out head piece being respectively inwall and going out head piece by thermofusible spigot formula inflow port and the thermofusible spigot formula that plastic materials constitutes.
8, plastic stop valve as claimed in claim 1 is characterized in that described valve seat is made of the valve-seat insert piece that periphery embeds the plastics valve body.
9, as claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 described plastic stop valves, the lower wall that it is characterized in that the runner below valve seat is provided with the downward reentrant part that is lower than inflow port runner lower wall, and the bottom of described downward reentrant part is made of the back cover lid that connects as one with the amalgamation of plastics valve body.
10, the merging that matches of plastic stop valve as claimed in claim 9, the peripheral side wall that it is characterized in that described back cover lid and the madial wall of the downward reentrant part of described plastics valve body is fixedlyed connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100219621A CN1296644C (en) | 2004-03-05 | 2004-03-05 | Plastic stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100219621A CN1296644C (en) | 2004-03-05 | 2004-03-05 | Plastic stop valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560496A CN1560496A (en) | 2005-01-05 |
| CN1296644C true CN1296644C (en) | 2007-01-24 |
Family
ID=34440944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100219621A Expired - Fee Related CN1296644C (en) | 2004-03-05 | 2004-03-05 | Plastic stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1296644C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943203A (en) * | 2010-09-26 | 2011-01-12 | 都江堰巨龙车辆有限公司 | Combined nut |
| CN103629364A (en) * | 2012-08-24 | 2014-03-12 | 成都科兴密封技术有限公司 | Leakage-proof stop valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845819A (en) * | 1986-02-14 | 1989-07-11 | Kubota Limited | Method for coupling two plastic constructive parts used in valve, joint and pipe devices |
| CN2397331Y (en) * | 1999-11-03 | 2000-09-20 | 张万武 | Plastic valve |
| JP2000337528A (en) * | 1999-05-27 | 2000-12-05 | Toto Ltd | Water faucet |
| CN2685664Y (en) * | 2004-03-05 | 2005-03-16 | 罗荣森 | Plastic stop valve |
-
2004
- 2004-03-05 CN CNB2004100219621A patent/CN1296644C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845819A (en) * | 1986-02-14 | 1989-07-11 | Kubota Limited | Method for coupling two plastic constructive parts used in valve, joint and pipe devices |
| JP2000337528A (en) * | 1999-05-27 | 2000-12-05 | Toto Ltd | Water faucet |
| CN2397331Y (en) * | 1999-11-03 | 2000-09-20 | 张万武 | Plastic valve |
| CN2685664Y (en) * | 2004-03-05 | 2005-03-16 | 罗荣森 | Plastic stop valve |
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| Publication number | Publication date |
|---|---|
| CN1560496A (en) | 2005-01-05 |
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Granted publication date: 20070124 |