CN1673584A - Plastic stop valve - Google Patents
Plastic stop valve Download PDFInfo
- Publication number
- CN1673584A CN1673584A CN 200510060118 CN200510060118A CN1673584A CN 1673584 A CN1673584 A CN 1673584A CN 200510060118 CN200510060118 CN 200510060118 CN 200510060118 A CN200510060118 A CN 200510060118A CN 1673584 A CN1673584 A CN 1673584A
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- valve
- stuffing box
- valve gap
- plastic
- plastics
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- 239000004033 plastic Substances 0.000 title claims abstract description 137
- 229920003023 plastic Polymers 0.000 title claims abstract description 137
- 239000003566 sealing material Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims description 29
- 229920000098 polyolefin Polymers 0.000 claims description 7
- 238000005267 amalgamation Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000012943 hotmelt Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 230000004308 accommodation Effects 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- -1 polypropylene Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920001748 polybutylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The utility model provides a plastics stop valve, has valve gap, valve clack, valve rod and plastics valve body, the valve rod passes the valve gap and is connected with the valve clack, is provided with the disk seat in the plastics valve body, the disk seat has the disk seat opening, the disk seat opening is relative with the valve clack that is located the valve rod bottom, and the both ends of plastics valve body have respectively and valve body influent stream mouth and the valve body outfall that are linked together with the disk seat opening, and the top of plastics valve body has the valve gap connector that is connected with the valve gap, and characterized by is provided with the stuffing box external member on the valve gap, the stuffing box external member includes the stuffing box casing and contains the sealing material in the stuffing box casing, the valve rod passes the stuffing box external member and contacts with the sealing material of containing in the stuffing. The plastic stop valve can maintain and replace the sealing material in the stuffing box under the condition that the valve cover is not detached from the plastic valve body, thereby bringing convenience to users.
Description
Technical field
The present invention relates to a kind of plastic stop valve.
Background technique
Existing have the not advantage of polluted source with the matching used plastic stop valve in TPO plastic water supply pipe road.This plastic stop valve has valve gap, flap, valve rod and plastics valve body, its valve rod passes valve gap and is connected with flap, in the plastics valve body, be provided with valve seat, this valve seat has the valve seat opening relative with the flap that is positioned at stem bottom, have the valve body inflow port and the valve body that are connected with the valve seat opening respectively in the plastics two ends of valve body and go out head piece, then have the valve gap connection mouth that is connected with valve gap at the top of plastics valve body.Existing plastic stop valve valve gap is provided with the reentrant part that is used to load the sealing material, in valve manufacturing field, generally this reentrant part is called stuffing box.When valve rod passed valve gap, the sidewall of valve rod can contact with the sealing material (as oil immersion asbestos packing, elastic sealing ring or Expanded graphite etc.) that loads in the stuffing box, and then realized the sealing to the valve rod sidewall.In the process of using plastic stop valve, occur the situation that the sealing material in the stuffing box damages sometimes, thereby need to safeguard or replacing sealing material.For the plastic stop valve that has, especially for the plastic stop valve of large mouth, the operation of above-mentioned maintenance or replacing sealing material is normally carried out under the situation that does not unload plastic stop valve from pipeline.In this case, for the ease of safeguarding or changing the sealing material, just the valve gap connection mouth of valve gap from the plastics valve body need be unloaded.But, in some specific occasions, and be not easy to even valve gap not to be unloaded from the plastics valve body, thereby caused obstacle for the maintenance and the replacing of above-mentioned sealing material.In addition, before unloading bottom flange and in the process of safeguarding the sealing material, also the water source of upstream will be turn-offed, this has also brought inconvenience to the user.Therefore, above-mentioned existing plastic stop valve need improve.
Summary of the invention
The objective of the invention is the stuffing box structure of above-mentioned existing product is improved, a kind of plastic stop valve of being convenient to safeguard and change the sealing material in the stuffing box is provided.
Plastic stop valve of the present invention has valve gap, flap, valve rod and plastics valve body, described valve rod passes valve gap and is connected with flap, 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 valve body inflow port and the valve body that are 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 is connected with valve gap, it is characterized in that valve gap is provided with the stuffing box external member, described stuffing box external member comprises the stuffing box housing and is included in the interior sealing material of stuffing box housing, described valve rod passes the stuffing box external member and contacts with sealing material in being included in the stuffing box housing, and described stuffing box housing is fixed on the valve gap through linkage structure.
In the present invention, the above-mentioned linkage structure that the stuffing box housing is fixed on the valve gap can be multiple structural type, as common screw connection structure, flanged connecting structure, link (as screw or connection clamp) linkage structure or the like.Because above-mentioned linkage structure is demountable, in the process of using plastic stop valve, when safeguarding and when changing, just can directly the stuffing box housing be unloaded from valve gap, and need not whole valve gap is unloaded from the plastics valve body to the sealing material in the stuffing box housing.Herein, the sealing material in the stuffing box housing still can adopt existing various sealing material, as oil immersion asbestos packing, elastic sealing ring or Expanded graphite or the like.
In the present invention, the Placement of valve gap connection mouth and valve gap can adopt existing thread connecting mode, but, because bottom flange is safeguarded and be need not to unload when changing again to the sealing material in the stuffing box housing, therefore, if do not need flap is not safeguarded or changes (as long enough in working life of flap and valve seat) that so, the present invention especially recommends to adopt and allows the valve gap connection mouth be connected in bonding mode with valve gap.This be because: when allowing the valve gap connection mouth be connected in bonding mode with valve gap, not only can significantly reduce the Cuprum alloy in the plastic stop valve or the consumption of other metallic material that is difficult for corrosion, and can make valve body more tight with being connected of valve gap, the sealing of connection part is also more reliable, more cleaning.Simultaneously, valve gap no longer with the form that is threaded with after valve body is connected, the connection mouth at valve gap and valve body top just no longer is constrained to circle, and the design that should be plastic stop valve mutually provides new space, helps improving the overall performance of plastic stop valve.In addition, bonding way can also avoid the stress that produces because of valve body connection mouth and being connected of valve gap to concentrate (this stress is concentrated to form the working life of valve and threatened), this problem that also to be existing valve body of plastic cut-off valve be difficult to basic solution with other linkage structure of valve gap.
When adopting bonding way, what can allow valve gap connection mouth and valve gap have to cooperatively interact is constituted and is used for bonding plastic bonding face mutually by plastic materials, makes the plastic bonding face of the plastic bonding face of valve gap connection mouth and described valve gap bonding mutually.
When adopting bonding way, the plastic bonding face of the plastic bonding face of valve gap and valve gap connection mouth can be one of following three kinds of modes or its combination: the plastic bonding face of (1), valve gap is the outer side surface of valve gap, and the plastic bonding face of valve gap connection mouth is the inner side surface of this valve gap connection mouth; (2), the plastic bonding face of valve gap connection mouth is the outer side surface of this valve gap connection mouth, the valve gap inner side surface of the plastic bonding face of valve gap for matching with the outer side surface of this valve gap connection mouth; (3), the plastic bonding face of valve gap connection mouth is the end face of valve gap connection mouth, the plastic bonding face of valve gap is the wall that matches with this valve gap connection mouth end face of valve gap.
When adopting bonding way, the plastic bonding face of above-mentioned valve gap connection mouth and valve gap can mode bonding by tackiness agent or hot melt adhesion be realized the connection between the two.When the mode with hot melt adhesion realizes connection between the two, can allow the plastic bonding face of above-mentioned valve gap connection mouth and valve gap by the plastic materials of hot melt adhesion mutually, constitute as polyolefine material.
Simultaneously,, can adopt common electrical heating elements to realize hot melt adhesion, also can adopt ultrasound to realize hot melt adhesion if adopt the hot melt adhesion mode.When carrying out hot melt adhesion, can adopt the hot melt dock bonding or the thermofusible spigot formula is bonding.From guaranteeing that product considers in the angle of the barrier performance of adhesive portion, the mode with thermofusible spigot of herein recommending makes the plastic bonding face of the plastic bonding face of valve gap and described valve gap connection mouth bonding mutually.
In plastic stop valve of the present invention, described valve gap can be the integral type valve gap that is made of single parts, but, described valve gap also can be by the valve gap inner core and the combined type valve gap that constitutes jointly of the inner core fixed block that cooperates with it, when adopting bonding way, the plastic bonding face that is made of plastic materials of above-mentioned valve gap is positioned on the inner core fixed block.Herein, said inner core fixed block can be by directly fixedlying connected with the valve gap inner core mode (as adopting link such as screw fixedly connected) realize fixing to the valve gap inner core, also can realize fixing by mode such as the valve gap inner core being nested with or pressured to the valve gap inner core.
In the present invention, said 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 metal frame in plastic basis material) that different materials is composited.For the latter, should make by plastic materials in the plastic bonding face portion of valve gap connection mouth at least.In like manner, for valve gap, it also can be to be composited by different materials.In plastic stop valve of the present invention, the parts of plastics of plastics valve body and valve gap can adopt to be convenient to be connected and the making of avirulent polyolefine material with plastic pipe, this polyolefine material can be a polythene material, it also can be polypropylene material, it can also be polybutylene material or the like, certainly, where necessary, also can in above-mentioned polyene material, add additives such as bulking agent, dyestuff in right amount.That is to say that the said polyolefins material described in the present invention is not that to refer in particular to purity be 100% polyolefine material.
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 also can be done:
The lower wall setting of the runner below valve seat is lower than the downward reentrant part of inflow port runner lower wall, to increase the runner area of passage at the contiguous position of valve seat, guarantees that plastic stop valve possesses enough inflow-rate of water turbines.In addition, for the ease of the processing of product, can allow the bottom of downward reentrant part constitute by the back cover lid that connects as one with the amalgamation of plastics valve body.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, and this fixedly connected tackiness agent that can adopt is bonding, also can adopt hot melt adhesion, but is good with hot melt adhesion especially.
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 inwall and go out head piece by thermofusible spigot formula inflow port and the thermofusible spigot formula that plastic materials constitutes.When the thermofusible spigot formula inflow port that adopts inwall to be made of plastic materials and thermofusible spigot formula went out head piece, the inwall that can also be respectively goes out head piece in thermofusible spigot formula inflow port and thermofusible spigot formula was provided with electric heating wire, so that the construction and installation of product.
Compared with the aforementioned existing similar products, the sealing material in the stuffing box can be safeguarded and change to plastic stop valve of the present invention under situation about valve gap not being unloaded from the plastics valve body, and in the process of maintenance and replacing sealing material, can not turn-off the upper waters source, as long as make the plastic stop valve that is keeped in repair be in closed condition, just can carry out the maintenance or the replacing of sealing material, thereby bring convenience to the user.What is more important: owing in the process of maintenance and replacing sealing material, do not need to unload bottom flange, therefore, if do not need flap is not safeguarded or changed, so, just can allow the valve gap connection mouth be connected in bonding mode, and then provide very wide space for the follow-up improvement of plastic stop valve with valve gap.
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 connection procedure schematic representation of valve body and valve gap among the embodiment 1.
Fig. 3 is the structural representation of plastic stop valve among the embodiment 2.
Fig. 4 is the connection procedure schematic representation of valve body and valve gap among the embodiment 2.
Fig. 5 is the structural representation of plastic stop valve among the embodiment 3.
Fig. 6 is the connection procedure schematic representation of valve body and valve gap among the embodiment 3.
Fig. 7 is the structural representation of plastic stop valve among the embodiment 4.
Fig. 8 is the structural representation of plastic stop valve among the embodiment 5.
Fig. 9 is the structural representation of plastic stop valve among the embodiment 6.
Embodiment
Embodiment 1: as Fig. 1, shown in 2, plastic stop valve in the present embodiment has valve gap 1, flap 2, valve rod 3 and plastics valve body 10, described valve rod 3 passes valve gap 1 and is connected with flap 2, in plastics valve body 10, be provided with valve seat 4, described valve seat 4 has valve seat opening 5, described valve seat opening 5 is relative with the flap 2 that is positioned at stem bottom, the two ends of described plastics valve body 10 have the valve body inflow port 6 and the valve body that are connected with valve seat opening 5 respectively and go out head piece 7, the top of described plastics valve body 10 has the valve gap connection mouth 8 that is connected with valve gap 1, it is characterized in that valve gap 1 is provided with the stuffing box external member, described stuffing box external member comprises the stuffing box housing and is included in the interior sealing material 11 of stuffing box housing, described valve rod 3 passes the stuffing box external member and contacts with sealing material 11 in being included in the stuffing box housing, and described stuffing box housing is fixed on the valve gap 1 through linkage structure.
In the present embodiment, the above-mentioned linkage structure that the stuffing box housing is fixed on the valve gap is connected screw with stuffing box external member on being arranged at valve gap and constitutes by being arranged at outside thread 18 on the stuffing box housing outer wall, and the internal thread 19 that described stuffing box external member connects in the screw matches with outside thread 18 on the stuffing box housing outer wall.
In this example, above-mentioned stuffing box housing is had through hole by the bottom filler accommodation box 9 constitutes with the lid 12 that has through hole, described filler accommodation box 9 is threaded with lid 12, described valve rod 3 passes the through hole offered lid 12 and filler accommodation box bottom and contacts with sealing material 11 in being included in the stuffing box housing, and the outside thread on the described stuffing box housing outer wall is arranged on the outer wall of filler accommodation box 9.
Simultaneously, the valve gap 1 in this example is installed the plastics valve gap of inserts 13 for being embedded with stuffing box, and described stuffing box external member is installed in this stuffing box and installs on the inserts 13.Above-mentioned stuffing box external member in this example connects screw and is opened on the stuffing box installation inserts 13.In addition, between stuffing box installation inserts 13 and stuffing box housing, be provided with gasket seal 32, to prevent issuable seepage.
In the present embodiment, valve gap connection mouth 8 and valve gap 1 have being constituted and be used for mutually bonding plastic bonding face by plastic materials of cooperatively interacting, and the plastic bonding face of described valve gap connection mouth 8 and the plastic bonding face of described valve gap are bonding mutually.Herein, the plastic bonding face of valve gap connection mouth 8 is the inner side surface 14 of this valve gap connection mouth, and the plastic bonding face of described valve gap 1 is the outer side surface 15 of valve gap.
Above-mentioned valve gap connection mouth 8 in this example and valve gap 1 can be bonding mutually plastic bonding face constitute by the plastic materials of hot melt adhesion mutually.The plastic materials of the above-mentioned hot melt adhesion mutually that is adopted in this example is a polyolefin plastics, is polythene material specifically, but also can be replaced by polypropylene or polybutylene material.
In addition, the valve body inflow port 6 of the described plastics valve body in the present embodiment and valve body go out head piece 7 and are respectively inwall and go out head piece by thermofusible spigot formula inflow port and the thermofusible spigot formula that plastic materials constitutes.
In order to increase inflow-rate of water turbine, be provided with the downward reentrant part 16 that is lower than inflow port runner lower wall in the runner of above-mentioned plastics valve body 10 below valve seat.Simultaneously, for the ease of the making of valve body, the bottom of above-mentioned downward reentrant part 16 is made of the back cover lid 17 that connects as one with the amalgamation of plastics valve body.
Embodiment 2: shown in Fig. 3,4, the plastic stop valve of present embodiment is similar to embodiment 1, and different is that in the present embodiment, the structure of stuffing box external member is different.In this example, stuffing box housing 20 is an integrated type, rather than is combined by filler accommodation box and lid, and simultaneously, the sealing material that is included in the stuffing box housing has adopted " O " type circle 21.In addition, stuffing box is installed inserts 13 except that being used for bonding pad letter external member, goes back the Stem Mut inserts use that conduct is implemented guiding to valve rod 3 and constituted kinematic pair.
Embodiment 3: shown in Fig. 5,6, the plastic stop valve of present embodiment is similar to embodiment 1, different is, in the present embodiment, described valve gap is that the plastic bonding face of valve gap is positioned on the inner core fixed block by the common combined type valve gap that constitutes of the inner core fixed block 22 of valve gap inner core 21 and cooperation with it (being the inner core gland in this example).
In the present embodiment, the plastic bonding face of valve gap connection mouth 8 is the outer side surface 24 of this connection mouth, the inner core fixed block inner side surface 23 of the plastic bonding face of inner core fixed block for matching with the outer side surface of this connection mouth.When practical set, can earlier valve gap inner core 21 be inserted valve gap connection mouth 8, allow inner core fixed block 22 and valve gap connection mouth 8 thermofusible spigots bonding again.After bonding the finishing, inner core fixed block 22 is just withheld on valve gap inner core 21.In order to strengthen the sealing between valve gap connection mouth 8 and the valve gap inner core 21, between valve gap inner core 21 and valve gap connection mouth 8, be provided with seal ring 29 in this example.
In addition, present embodiment also on the inwall of thermofusible spigot formula inflow port and the thermofusible spigot formula go out on the inwall of head piece to be respectively arranged with electric heating wire 25,26.
Embodiment 4: as shown in Figure 7, the plastic stop valve of present embodiment is similar to embodiment 1, different is, in the present embodiment, the stuffing box housing is fixed on linkage structure on the valve gap by being arranged at internal thread on the stuffing box housing (being the internal thread on the filler accommodation box 9 in this example) and being arranged at stuffing box external member connecting thread formation on the valve gap, and described stuffing box external member connecting thread matches with internal thread on the stuffing box housing.In this example, be provided with on valve gap and have externally threaded stuffing box inserts 27 is installed, above-mentioned stuffing box external member connecting thread is the outside thread on this inserts.In addition, stuffing box is installed inserts 27 except that being used for bonding pad letter external member, goes back the Stem Mut inserts use that conduct is implemented guiding to valve rod 3 and constituted kinematic pair, and this point is similar to embodiment 2.
Embodiment 5: as shown in Figure 8, the plastic stop valve of present embodiment is similar to embodiment 4, and different is in the present embodiment, the linkage structure that the stuffing box housing is fixed on the valve gap 1 to be served as by attachment screw 28.
Embodiment 6: as shown in Figure 9, the plastic stop valve of present embodiment is similar to embodiment 1, and different is, in the present embodiment, filler accommodation box 30 in the stuffing box housing also has extension part 31, and this extension part 31 uses as the Stem Mut of valve rod 3 being implemented guiding and formation kinematic pair.
Claims (10)
1, a kind of plastic stop valve, has valve gap, flap, valve rod and plastics valve body, described valve rod passes valve gap and is connected with flap, 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 valve body inflow port and the valve body that are 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 is connected with valve gap, it is characterized in that valve gap is provided with the stuffing box external member, described stuffing box external member comprises the stuffing box housing and is included in the interior sealing material of stuffing box housing, described valve rod passes the stuffing box external member and contacts with sealing material in being included in the stuffing box housing, and described stuffing box housing is fixed on the valve gap through linkage structure.
2, plastic stop valve as claimed in claim 1, it is characterized in that described valve gap connection mouth and valve gap have being constituted and be used for mutually bonding plastic bonding face by plastic materials of cooperatively interacting, the plastic bonding face of described valve gap connection mouth and the plastic bonding face of described valve gap are bonding mutually.
3, plastic stop valve as claimed in claim 2 is characterized in that described valve gap is by the valve gap inner core and the combined type valve gap that constitutes jointly of the inner core fixed block that cooperates with it, and the plastic bonding face of described valve gap is positioned on the inner core fixed block.
4, plastic stop valve as claimed in claim 1 is characterized in that the valve body inflow port of described plastics valve body and valve body go out head piece and be respectively inwall and go out head piece by thermofusible spigot formula inflow port and the thermofusible spigot formula that plastic materials constitutes.
5, plastic stop valve as claimed in claim 4, it is characterized in that on the inwall of thermofusible spigot formula inflow port and the thermofusible spigot formula go out on the inwall of head piece to be respectively arranged with electric heating wire.
6, plastic stop valve as claimed in claim 1 is characterized in that being provided with the downward reentrant part that is lower than inflow port runner lower wall in the runner of described plastics valve body below valve seat.
7, plastic stop valve as claimed in claim 6, the bottom that it is characterized in that described downward reentrant part is made of the back cover lid that connects as one with the amalgamation of plastics valve body.
8,, it is characterized in that the mutual bonding plastic bonding face that is used for of described valve gap connection mouth and valve gap constitutes by the polyolefin plastics material as claim 2 or 3 described plastic stop valves.
9, plastic stop valve as claimed in claim 1, it is characterized in that the described linkage structure that the stuffing box housing is fixed on the valve gap is connected screw with stuffing box external member on being arranged at valve gap and constitutes by being arranged at outside thread on the stuffing box housing outer wall, the internal thread that described stuffing box external member connects in the screw matches with outside thread on the stuffing box housing outer wall.
10, plastic stop valve as claimed in claim 1 is characterized in that described valve gap is to be embedded with the plastics valve gap that stuffing box is installed inserts, and described stuffing box external member is installed in this stuffing box and installs on the inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510060118 CN1673584A (en) | 2004-03-26 | 2005-03-25 | Plastic stop valve |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410022129.9 | 2004-03-26 | ||
| CN 200410022129 CN1563752A (en) | 2004-03-26 | 2004-03-26 | Plastic stop valve |
| CN200410022291.0 | 2004-04-13 | ||
| CN 200410022291 CN1563753A (en) | 2004-04-13 | 2004-04-13 | Plastic stop valve |
| CN 200510060118 CN1673584A (en) | 2004-03-26 | 2005-03-25 | Plastic stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1673584A true CN1673584A (en) | 2005-09-28 |
Family
ID=35046295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510060118 Pending CN1673584A (en) | 2004-03-26 | 2005-03-25 | Plastic stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1673584A (en) |
-
2005
- 2005-03-25 CN CN 200510060118 patent/CN1673584A/en active Pending
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