CN1570433A - Plastic stop valve - Google Patents
Plastic stop valve Download PDFInfo
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- CN1570433A CN1570433A CN 200410022471 CN200410022471A CN1570433A CN 1570433 A CN1570433 A CN 1570433A CN 200410022471 CN200410022471 CN 200410022471 CN 200410022471 A CN200410022471 A CN 200410022471A CN 1570433 A CN1570433 A CN 1570433A
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Abstract
One kind of plastic cut-off valve, has the valve cover, the valve petal, the valve lever and the plastic valve body, has the valve seat in the plastic valve in vivo establishment, states the valve seat to have the valve seat aperture, this valve seat opens the mouth with to be located the valve lever base the valve petal relatively, states the plastic valve body the beginnings and ends separately to have enters flows the mouth which opens the mouth with the valve seat to connect and flows the mouth, states the plastic valve body the crown to have the valve cover continually connection which coordinates with the valve cover. Its characteristic is has continually the connection in the valve cover continually connection sidewall waist establishment to indent. Has the valve cover in the valve cover sidewall establishment to indent, states the valve cover to indent with to state continually the connection to indent relatively but to constitute together continually take up, states continually take up has by this continually take up exterior junction piece enters the channel to continually take up the interior, in states continually take up in fills has by junction piece enters the channel to enter continually take up and inlays in the valve cover indents and continually the connection enters a between junction piece, in states junction piece enters on the channel to establish has lead locks up the 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 mainly 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, might occur with valve gap that metal insert is connected on the problem of plastics outside thread insufficient strength, and influence the quality and the working life of entire product thus.In addition, in above-mentioned existing patent, mention, the metal insert that is embedded on the plastics valve body and is used for fastening valve gap can adopt plastic materials to make, generally speaking, adopt plastics inserts alternative metals inserts can reduce production cost of products significantly, but after changing the plastics inserts into, this product can produce the problem of the plastics internal thread insufficient strength on the plastics inserts again.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 provided with the Stem Mut inserts in the described valve gap, on described 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, it is characterized in that being provided with the connection mouth reentrant part at the waist of the sidewall of described valve gap connection mouth, sidewall at valve gap is provided with the valve gap reentrant part, described valve gap reentrant part is relative with described connection mouth reentrant part and constitute connection chamber jointly, described connection chamber has the contiguous block inlet passage that is led to connection chamber inside by the outside of this connection chamber, in described connection chamber, be filled with by the contiguous block inlet passage enter connection chamber and be embedded in the valve gap reentrant part and the connection mouth reentrant part between contiguous block, described contiguous block inlet passage is provided with the entry port lock structure.
In technological scheme of the present invention, by being embedded in the contiguous block between valve gap reentrant part and the connection mouth reentrant part, realized being connected of valve gap and valve body, and to lead to the contiguous block inlet passage role of connection chamber inside be convenient to contiguous block is sent into connection chamber in above-mentioned outside by this connection chamber.In the present invention, by above-mentioned by the contiguous block inlet passage send into connection chamber and be embedded in the valve gap reentrant part and the connection mouth reentrant part between contiguous block can make by metal or plastics or other material.This contiguous block can be one, but also can be a plurality of (promptly more than two or two).When assembling valve of the present invention, can or adopt special tool by the rotation valve gap, successively each contiguous block is sent into connection chamber.Because the reentrant part on the valve gap, the reentrant part of valve gap connection mouth sidewall and the contiguous block that is embedded between the two all can directly adopt comparatively cheap plastic materials to make, the position at valve gap reentrant part, valve gap connection mouth reentrant part 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 the present invention, the above-mentioned connection mouth reentrant part that is positioned at valve gap connection mouth sidewall can be the ring-type reentrant part along the madial wall of connection mouth or outer side wall layout, it also can only be the part (being the ring that reentrant part does not constitute a sealing) of this ring-type reentrant part, corresponding with it, the above-mentioned valve gap reentrant part that is positioned at the valve gap sidewall can be the ring-type reentrant part of arranging along the valve gap sidewall, but also can only be the part of this ring-type reentrant part.
Above-mentioned connection mouth reentrant part both can be arranged on the madial wall of valve gap connection mouth, also can be arranged on the outer side wall of valve gap connection mouth.Before adopting, during a kind of mode, valve gap can be inserted in the valve gap connection mouth, and the valve gap reentrant part is arranged on the insertion valve gap connection mouth outer side wall partly of valve gap.When adopting a kind of mode in back, valve gap is had be fastened on valve gap connection mouth outer side wall on the valve gap buckling part, and allow the madial wall of valve gap buckling part match, and allow the valve gap reentrant part be arranged on the madial wall of this valve gap buckling part with the outer side wall of valve gap connection mouth.Simultaneously, after employing, during a kind of mode, can also allow valve gap combine, and the Stem Mut inserts is positioned on the valve gap core body, allow the valve gap core body be inserted in the valve gap connection mouth by valve gap core body and valve gap buckling part.At this moment, valve gap core body and valve gap buckling part can be connected to one, but also separable setting.Separate the mode that is provided with if adopt, then should allow the valve gap buckling part be pressed on the valve gap core body.When allowing the valve gap core body be inserted in the valve gap connection mouth, the sidewall of valve gap core body is matched with the madial wall of valve gap connection mouth, thereby be convenient between the madial wall of the sidewall of valve gap core body and valve gap connection mouth, Sealing is set.
The contiguous block inlet passage of offering with regard to above-mentioned connection chamber, it can adopt multiple setting type, for example, it can be the passage that is opened on the plastics valve outer wall, it also can be the passage that is opened on the valve gap, can also be arranged on the sidewall of valve body connection mouth and the passage between the valve gap sidewall, for the latter, the set-up mode of this moment is the groove type entry port that leads to connection chamber in the sidewall setting of valve body connection mouth, the groove type entry port that also leads to simultaneously connection chamber in the sidewall setting of valve gap, and allow the groove type entry port of valve body connection mouth sidewall and the groove type entry port relative (coming down to the phase amalgamation) of valve gap sidewall, thereby be the inlet passage that leads to connection chamber by groove type entry port on the valve body connection mouth sidewall and the common amalgamation of groove type entry port on the valve gap sidewall.
The present invention is provided with the entry port lock structure on the contiguous block inlet passage purpose is to prevent that the contiguous block in the connection chamber from deviating from voluntarily from this entry port.Set entry port lock structure can be the entry port plugging block of intercalation in entry port, also can be entry port locking pin or similar structure.
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.Where necessary, can also be at the side wall spacer inserts of valve gap connection mouth, so that the making of plastics valve body.
In the process of using plastic stop valve of the present invention, when needs unload bottom flange and overhaul, can open the entry port lock structure, and by rotation valve gap or employing special tool, make each contiguous block that is filled in the connection chamber move to the inlet passage position successively and with its taking-up, after taking out whole contiguous blocks, just valve gap can be unloaded from the plastics valve body, realize the replacing after flap or other valve part damage.After maintenance is finished, can again each contiguous block be sent into connection chamber successively by the contiguous block inlet passage, realize valve gap fixing on the plastics valve body.
In the present invention, between valve gap and valve gap connection mouth, occur relatively rotating, should take corresponding technical measures usually.This technical measures can be polytypes, for example: 1, allow valve gap and valve gap connection mouth drive fit; 2, utilize sealing configuration or sealed member between the contact position of valve gap and valve gap connection mouth to prevent that the two from relatively rotating; 3, the anti-rotation structure prevent the valve gap rotation is set between valve gap and plastics valve body, as is inserted in latch between valve gap and the plastics valve body, is arranged at concaveconvex structure between valve gap and the valve gap connection mouth or the like.
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 arranged on the below of above-mentioned connection chamber.
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.
Except that the Stem Mut inserts is set, other parts can also be arranged on the valve gap among the present invention, as stuffing box packing, Gland or other inserts etc.
For the ease of the making larger caliber, and the area of passage of runner is enough 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:
Transition inserts and the stuffing box inserts of superimposed successively peripheral build-in in valve gap is provided with filler and Gland in the stuffing box inserts on the Stem Mut 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.Make when the Stem Mut inserts adopts Cuprum alloy or other metallic material, 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 the 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.Set valve-seat insert piece can be embedded in the plastics valve body when injection moulding.
The lower wall setting of the runner below valve seat is lower than the downward reentrant part of inflow port runner lower wall, and allows the bottom of downward reentrant part be made of 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.For the ease of the processing of product, the peripheral side wall that can allow described back cover cover usually matches to merge with the madial wall of the downward reentrant part of described plastics valve body and fixedlys connected.This fixedly connected tackiness agent that can adopt is bonding, also can adopt hot melt to connect, but be connected to good especially with hot melt.
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, the problem of plastics outside thread insufficient strength on the valve gap that plastic stop valve of the present invention has solved effectively with metal insert is connected, simultaneously, product of the present invention has been banned fully and has been used for the metal insert that is connected with outside thread on the valve gap, when making the plastic stop valve of larger caliber, can reduce production cost of products significantly, and solved the problem of plastic whorl insufficient strength, therefore, product of the present invention 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 view of Fig. 1.
Fig. 4 is the C--C sectional view of Fig. 1.
Fig. 5 is the D--D sectional view of Fig. 1.
Fig. 6 is the valve body structure schematic representation of plastic stop valve among Fig. 1.
Fig. 7 is the plan view of Fig. 6.
Fig. 8 is the structural representation (rear view of valve gap among Fig. 1) of valve gap among the embodiment 1.
Fig. 9 is the plan view of Fig. 8.
Figure 10 is the structural representation of plastic stop valve among the embodiment 2.
Figure 11 is the E--E sectional view of Figure 10.
Figure 12 is the structural representation of plastic stop valve among the embodiment 3.
Figure 13 is the F--F sectional view of Figure 12.
Figure 14 is the G--G sectional view of Figure 12.
Figure 15 is the valve body structure schematic representation of plastic stop valve among Figure 12.
Figure 16 is the plan view of Figure 15.
Figure 17 is the rear view of Figure 15.
Figure 18 is the H--H sectional view of Figure 17.
Figure 19 is the valve gap core schematic representation of plastic stop valve among Figure 12.
Figure 20 is the plan view of Figure 19.
Figure 21 is the valve gap buckling part structural representation of plastic stop valve among Figure 12.
Figure 22 is the plan view of Figure 21.
Figure 23 is the K--K sectional view of Figure 21.
Figure 24 is the plan view of Figure 23.
Figure 25 is the trim structural representation of plastic stop valve among Figure 12.
Figure 26 is the plan view of Figure 25.
The structural representation of plastic stop valve among Figure 27 embodiment 4.
Figure 28 is the L--L sectional view of Figure 27.
Figure 29 is the M--M sectional drawing of Figure 27.
Embodiment
Embodiment 1: shown in Fig. 1～9, plastic stop valve in the present embodiment has valve gap 1, flap 2, valve rod 3 and plastics valve body 4, be provided with Stem Mut inserts 5 in the described valve gap 1, on described Stem Mut inserts 5, offer screw, described valve rod 3 is placed in this screw, outside thread on the described valve rod 3 matches with the internal thread of this screw and constitutes kinematic pair, in plastics valve body 4, be provided with valve seat 6, described valve seat 6 has valve seat opening 7, described valve seat opening 7 is relative with the flap 2 that is positioned at stem bottom, the two ends of described plastics valve body 4 have the inflow port 8 that is connected with valve seat opening 7 respectively and go out head piece 9, the top of described plastics valve body 4 has the valve gap connection mouth 10 that matches with valve gap, it is characterized in that being provided with connection mouth reentrant part 11 at the waist of the sidewall of described valve gap connection mouth 10, sidewall at valve gap 1 is provided with valve gap reentrant part 12, described valve gap reentrant part 12 and described connection mouth reentrant part 11 are relative and constitute connection chamber jointly, described connection chamber has the contiguous block inlet passage that is led to connection chamber inside by the outside of this connection chamber, in described connection chamber, be filled with by the contiguous block inlet passage enter connection chamber and be embedded in the valve gap reentrant part and the connection mouth reentrant part between contiguous block 14, described contiguous block inlet passage is provided with entry port lock structure 15.
In the present embodiment, above-mentioned connection mouth reentrant part 11 is arranged on the madial wall of valve gap connection mouth 10, valve gap 1 is inserted in the valve gap connection mouth 10, valve gap reentrant part 12 is arranged on the insertion valve gap connection mouth outer side wall partly of valve gap, and above-mentioned reentrant part all is circular reentrant part of arranging along the connection mouth sidewall.Set entry port lock structure 15 is served as by trim in this example.Simultaneously, present embodiment also is provided with the anti-rotation structure 16 that prevents the valve gap rotation between above-mentioned valve gap 1 and plastics valve body 4, and herein, set anti-rotation structure 16 is the inserted block form.
Above-mentioned contiguous block inlet passage in the present embodiment is to be opened on the outer wall of plastics valve body 4 and valve gap 1 and between the sidewall of valve body connection mouth and valve gap sidewall and the passage that leads to connection chamber inside.The set-up mode of this moment is that the groove type entry port 29 that leads to connection chamber is set on the sidewall of valve body connection mouth, the groove type entry port 30 that also leads to simultaneously connection chamber in the sidewall setting of valve gap, and allow the groove type entry port 29 of valve body connection mouth sidewall and the groove type entry port 30 relative (also can be considered and make the two phase amalgamation) of valve gap sidewall, thereby constituted the inlet passage that leads to connection chamber jointly by groove type entry port 29 on the valve body connection mouth sidewall and the groove type entry port 30 on the valve gap sidewall.
When the plastic stop valve of assembling in the present embodiment, can earlier valve gap 1 be inserted in the valve gap connection mouth 10, in connection chamber, put into contiguous block 14 successively by the contiguous block inlet passage again.Whenever put into a contiguous block, promptly allow valve gap 1 rotate to an angle, make contiguous block 14 enter the non-inlet passage position of connection chamber.After contiguous block 14 was all piled at the non-inlet passage position of connection chamber, the anti-rotation structure 16 with the inserted block form embedded inlet passages again, covers the entry port lock structure 15 that is served as by trim at last, thereby realized being connected of valve gap 1 and valve body 4.Contiguous block 14 in the present embodiment is made by plastic materials.
In the process of using the present embodiment plastic stop valve, when needs unload bottom flange 1 and overhaul, can open entry port lock structure 15, take out the anti-rotation structure 16 of inserted block form, by rotation valve gap and adopt special tool, make each contiguous block 14 that is filled in the connection chamber move to the inlet passage position successively and with its taking-up, after taking out whole contiguous blocks, just valve gap 1 can be unloaded from plastics valve body 4, realize the replacing after flap or other valve part damage.After maintenance is finished, can again valve gap 1 be fixed on plastics valve body 4 by aforementioned mounting type.For the ease of installing and drawing off contiguous block 14, present embodiment all is provided with the mounting hole 17 of just going into to adopt special tool to promote on each contiguous block.
In order to increase the inflow-rate of water turbine at the contiguous position of valve seat, be provided with the downward reentrant part 18 that is lower than inflow port runner lower wall in the runner in this example below valve seat 6, the bottom of described downward reentrant part 18 is made of the back cover lid 19 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.The peripheral side wall of the above-mentioned back cover lid 19 in this example matches to merge with the madial wall of the downward reentrant part 18 of plastics valve body and fixedlys connected, and this Placement can realize (adopting thermofusible spigot to connect in this example) by thermofusible spigot or bonding way.
The inflow port 8 of plastics valve body and go out head piece 9 and be respectively inwall and go out head piece by thermofusible spigot formula inflow port and the thermofusible spigot formula that plastic materials constitutes in the present embodiment, this kind helps being connected with the plastic pipe thermofusible spigot into and out of head piece.
In addition, outwards ooze out along the contact position of valve gap 4, between their contact position, be provided with seal ring 20 especially with valve gap connection mouth 10 in order to prevent liquid.Seal ring 20 in this example is arranged on the below of connection chamber, and sealing ring 20 is folded between the sidewall of valve gap sidewall and valve gap connection mouth.
Present embodiment is superimposed with transition inserts 21 and the stuffing box inserts 22 of peripheral build-in on valve gap successively on above-mentioned Stem Mut inserts 5, be provided with filler 23 and Gland 24 in stuffing box inserts 22.Herein, set Stem Mut inserts 5 is a metal insert, and 21 of transition inserts are the plastics inserts, to reduce the fabricating cost of product.
In the present embodiment, the surface towards valve seat 6 of flap 2 is a rubber covering.The material of valve seat 6 is identical with the plastics valve body, is promptly made by plastic materials.
Embodiment 2: shown in Figure 10,11, the plastic stop valve in the present embodiment is similar to embodiment 1, and different is that present embodiment is provided with electric heating wire 25,26 at inflow port 8 and the inwall that goes out head piece 9 respectively.In addition, in the present embodiment, the shaped slightly of the entry port lock structure 15 of trim form changes, and this lock structure 15 is threaded with the outer side wall of valve gap connection mouth.
Embodiment 3: shown in Figure 12～26, plastic stop valve in the present embodiment still is provided with connection mouth reentrant part 11 at the waist of the sidewall of valve gap connection mouth 10, sidewall at valve gap is provided with valve gap reentrant part 12, described valve gap reentrant part 12 and described connection mouth reentrant part 11 are relative and constitute connection chamber jointly, described connection chamber has the contiguous block inlet passage 13 that is led to connection chamber inside by the outside of this connection chamber, in described connection chamber, be filled with by the contiguous block inlet passage enter connection chamber and be embedded in the valve gap reentrant part and the connection mouth reentrant part between contiguous block 14, described contiguous block inlet passage 13 is provided with entry port lock structure 15.As different from Example 1: in the present embodiment, above-mentioned connection mouth reentrant part 11 is arranged on the outer side wall of valve gap connection mouth 10, described valve gap has the valve gap buckling part 27 that is fastened on the valve gap connection mouth outer side wall, the madial wall of described valve gap buckling part 27 matches with the outer side wall of valve gap connection mouth 10, and described valve gap reentrant part 12 is arranged on the madial wall of this valve gap buckling part 27.
In the present embodiment, valve gap is combined by valve gap core body 28 and valve gap buckling part 27, and Stem Mut inserts 5 is positioned on the valve gap core body 28, and valve gap core body 28 is inserted in the valve gap connection mouth 10.Valve gap core body 28 in this example separates setting with valve gap buckling part 27, and valve gap buckling part 27 is pressed on the valve gap core body 28.But need to prove that the form of one also can be taked to fixedly connected or directly be made as to valve gap core body 28 and valve gap buckling part 27.Allow valve gap core body 28 be inserted in the valve gap connection mouth 10 in this example, and the sidewall of valve gap core body 28 is matched with the madial wall of valve gap connection mouth 10, thereby be convenient between the madial wall of the sidewall of valve gap core body 28 and valve gap connection mouth 10, Sealing is set.
Connection mouth reentrant part 11 in the present embodiment is the parts (being the ring that reentrant part does not constitute a sealing) along the ring-type reentrant part of the outer side wall layout of connection mouth, corresponding with it, the above-mentioned valve gap reentrant part 12 that is positioned on the valve gap buckling part also only is the part of ring-type reentrant part.Simultaneously, the passage of the contiguous block inlet passage in the present embodiment 13 for being opened on the valve gap outer wall and leading to connection chamber inside.
In addition, the valve seat 6 in the present embodiment 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 metal seat valve inserts (being the Cuprum alloy inserts herein), and this valve-seat insert piece is embedded in the plastics valve body when injection moulding.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.Corresponding with it, metallic material (being Cuprum alloy herein) has also been adopted on the surface towards valve seat 6 of flap 2.
In the present embodiment, the shape of the entry port lock structure 15 of trim form is identical with embodiment 2.
Present embodiment is provided with the concaveconvex structure 33,34 that cooperatively interacts on the top of valve gap connection mouth and valve gap core body, occur relatively rotating between valve gap core body 28 and the valve gap connection mouth 10 avoiding.In addition, present embodiment also is provided with the spline bayonet socket 31 relative with contiguous block inlet passage 13 at the outer side wall of connection mouth 10, when inserted block 32 embeds contiguous block inlet passage 13, its front end can insert this spline bayonet socket 31, prevents to occur between valve gap buckling part 27 and the valve gap connection mouth 10 effect in relative rotation thereby play.Therefore, in the present embodiment, be to have constituted the anti-rotation structure that prevents the valve gap rotation jointly by above-mentioned concaveconvex structure 33,34 and inserted block 32, spline bayonet socket 31.
Embodiment 4: shown in Figure 27～29, the plastic stop valve in the present embodiment is similar to embodiment 3, and different is, in the present embodiment, for the ease of the making of injection mould, the orientation of contiguous block inlet passage 13 is adjusted, promptly the axis around valve rod 3 has rotated 90 degree.
Claims (10)
1, a kind of plastic stop valve, has valve gap, flap, valve rod and plastics valve body, be provided with the Stem Mut inserts in the described valve gap, on described 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, it is characterized in that being provided with the connection mouth reentrant part at the waist of the sidewall of described valve gap connection mouth, sidewall at valve gap is provided with the valve gap reentrant part, described valve gap reentrant part is relative with described connection mouth reentrant part and constitute connection chamber jointly, described connection chamber has the contiguous block inlet passage that is led to connection chamber inside by the outside of this connection chamber, in described connection chamber, be filled with by the contiguous block inlet passage enter connection chamber and be embedded in the valve gap reentrant part and the connection mouth reentrant part between contiguous block, described contiguous block inlet passage is provided with the entry port lock structure.
2, plastic stop valve as claimed in claim 1, it is characterized in that described connection mouth reentrant part is arranged on the madial wall of valve gap connection mouth, described valve gap is inserted in the valve gap connection mouth, and described valve gap reentrant part is arranged on the insertion valve gap connection mouth outer side wall partly of valve gap.
3, plastic stop valve as claimed in claim 1, it is characterized in that described connection mouth reentrant part is arranged on the outer side wall of valve gap connection mouth, described valve gap has the valve gap buckling part that is fastened on the valve gap connection mouth outer side wall, the madial wall of described valve gap buckling part matches with the outer side wall of valve gap connection mouth, and described valve gap reentrant part is arranged on the madial wall of this valve gap buckling part.
4, plastic stop valve as claimed in claim 3 is characterized in that described valve gap is combined by valve gap core body and valve gap buckling part, and described Stem Mut inserts is positioned on the valve gap core body, and described valve gap core body is inserted in the valve gap connection mouth.
5, plastic stop valve as claimed in claim 1 is characterized in that being provided with the anti-rotation structure that prevents the valve gap rotation between described valve gap and plastics valve body.
6, 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.
7, plastic stop valve as claimed in claim 1 is characterized in that being provided with in the runner below valve seat 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.
8, the merging that matches of plastic stop valve as claimed in claim 7, 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.
9,, it is characterized in that described inflow port and go 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 as claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 described plastic stop valves.
10, plastic stop valve as claimed in claim 9 is characterized in that respectively the inwall that goes out head piece in thermofusible spigot formula inflow port and thermofusible spigot formula is provided with electric heating wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100224719A CN100434776C (en) | 2004-05-09 | 2004-05-09 | Plastic stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100224719A CN100434776C (en) | 2004-05-09 | 2004-05-09 | Plastic stop valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570433A true CN1570433A (en) | 2005-01-26 |
| CN100434776C CN100434776C (en) | 2008-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100224719A Expired - Fee Related CN100434776C (en) | 2004-05-09 | 2004-05-09 | Plastic stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100434776C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395975A (en) * | 2018-12-25 | 2019-03-01 | 肖根福罗格注胶技术(苏州工业园区)有限公司 | Glue glue injecting head for the high filler of high viscosity |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08200539A (en) * | 1995-01-30 | 1996-08-06 | Neriki:Kk | Spring-closed type valve |
| DE19900230C2 (en) * | 1999-01-07 | 2001-03-22 | Stuebbe Asv Gmbh | Shut-off valve |
| CN2580217Y (en) * | 2002-11-07 | 2003-10-15 | 薛孟德 | Stop valve |
| CN2695737Y (en) * | 2004-05-09 | 2005-04-27 | 罗荣森 | Plastic stop valve |
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2004
- 2004-05-09 CN CNB2004100224719A patent/CN100434776C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395975A (en) * | 2018-12-25 | 2019-03-01 | 肖根福罗格注胶技术(苏州工业园区)有限公司 | Glue glue injecting head for the high filler of high viscosity |
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| Publication number | Publication date |
|---|---|
| CN100434776C (en) | 2008-11-19 |
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