CN205371652U - Soft -sealing butterfly valve - Google Patents
Soft -sealing butterfly valve Download PDFInfo
- Publication number
- CN205371652U CN205371652U CN201521048291.8U CN201521048291U CN205371652U CN 205371652 U CN205371652 U CN 205371652U CN 201521048291 U CN201521048291 U CN 201521048291U CN 205371652 U CN205371652 U CN 205371652U
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- CN
- China
- Prior art keywords
- valve
- cast iron
- sealing butterfly
- soft sealing
- butterfly valve
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Abstract
The utility model discloses a soft -sealing butterfly valve, including the cast iron valve body, with cast iron valve body interference fit's removable formula rubber valve seat, the cast iron valve plate to and upper valve shaft and lower valve shaft, the sealed face of cast iron valve plate on be provided with the epoxy resin paint layer, the epoxy resin paint layer be whole sphere. The utility model discloses with soft -sealing butterfly valve's close design of front cover become one whole spherical, can effectively reduce sealed moment of torsion, greatly reduced the moment of torsion of open/close valve door. And with the processing of spraying paint of nodular cast iron valve plate, reduced electroplate process's environmental pollution in the past, be applicable to more environment moreover, special environment such as drinking water, water supply for example.
Description
Technical field
This utility model relates to valve technology field, particularly relates to a kind of soft sealing butterfly valve.
Background technology
In prior art, between valve seat and the butterfly plate of tradition butterfly valve, many employing cylinder inner planes coordinate, there is certain drawback in the fit system of this structure: can not coordinate too tight between butterfly plate and valve seat, if coordinating too tight, valve switch is just highly difficult, if not exerting oneself, being difficult to Open valve or completely closing valve, and firmly close valve, butterfly plate is just easily deformed and causes damage.But, if butterfly plate coordinates defective tightness with valve seat, then it is easy to produce leakage.
Utility model content
The purpose of this utility model is for the technological deficiency existed in prior art, and provides a kind of soft sealing butterfly valve.
Be the technical scheme is that by realizing the purpose of this utility model
A kind of soft sealing butterfly valve, including cast iron valve body, with the changeable type rubber valve seat of described cast iron valve body interference fit, cast iron valve plate, and upper valve shaft and lower valve shaft, the sealing surface of described cast iron valve plate is provided with epoxy resin enamelled coating, described epoxy resin enamelled coating is in overall sphere.
The width of described sealing surface is at 3-5mm.
Described cast iron valve plate is spheroidal graphite cast-iron.
The thickness of described epoxy resin enamelled coating is 0.125mm-0.175mm.
Described valve seat is exoskeletal quality of rubber materials valve seat.
The outer middle side part of described valve seat is formed with multiple interval and arranges and the reinforcement that axially extends is with relative valve body fixed valve base.
The lower valve port place of described cast iron valve body is provided with lower plug cover, and described lower plug cover is connected by screw thread and described lower valve shaft lower end are fixing, meanwhile, is provided with jump ring to prevent it from going out downwards between described lower valve shaft lower end and valve body.
Compared with prior art, the beneficial effects of the utility model are:
The sealing surface of soft sealing butterfly valve is designed to an integral spherical by this utility model, can effectively reduce packing torque, greatly reduce the moment of torsion of opening/shutting valve.And process that nodular cast iron valve plate is sprayed paint, reduce the environmental pollution of conventional electroplating processes, and be applicable to more environment, for instance the special environment such as drinking water, water supply.
Accompanying drawing explanation
Fig. 1 show the structural representation of soft sealing butterfly valve of the present utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
As shown in Figure 1, soft sealing butterfly valve of the present utility model includes cast iron valve body 1, rubber valve seat 7, cast iron valve plate 8, and upper valve shaft 6, lower valve shaft 9, being provided with epoxy resin enamelled coating on the sealing surface of described cast iron valve plate, the width of described sealing surface is at 3-5mm, and described epoxy resin enamelled coating is in overall sphere.Described sealing surface includes the two sides of valve plate and the upper end face corresponding with upper valve port and lower end face corresponding to lower valve port, and this four part is on same sphere.The sealing surface of soft sealing butterfly valve is designed to an integral spherical, reduces the width of sealing surface simultaneously, can effectively reduce packing torque, greatly reduce the moment of torsion of opening/shutting valve.Simultaneously, nodular cast iron valve plate is sprayed paint process, reduce the environmental pollution of conventional electroplating processes, and it is applicable to more environment, the such as special environment such as drinking water, water supply, specifically, nodular cast iron valve plate sealing surface spray paint for old man's board epoxy resin coating, the thickness of epoxy resin enamelled coating is 0.125mm to 0.175mm.
Wherein, described upper valve shaft upper end passes from the upper valve port of valve body and passes through key 1 and is connected to realize the unlatching of cast iron valve plate 8 with operating-controlling mechanism, simultaneously, described upper valve shaft 6 is provided with ring groove and realizes the sealing between valve shaft and valve body with sealing ring 5 on location, the upper valve shaft 6 on described upper sealing ring 5 top is arranged with upper guide bush 4 to carry out leading and reducing friction, reduce and open moment, the top of the upper valve port of described valve body is fixedly installed gland 14 and divided ring 2 and filler 3 realizes sealing and the location of end, wherein, described upper guide bush top is positioned by divided ring, the step location forming the inner stopper in upper valve port upper end is arranged at bottom.
The lower valve port place of described cast iron valve body is provided with lower plug cover 13, and described lower plug cover is connected by screw thread and described valve shaft lower end are fixing, meanwhile, is provided with jump ring 12 to prevent it from going out downwards between described valve shaft lower end and valve body.The double break axle of this utility model valve plate, the relative axis design of valve plate decreases the thickness at middle part, effectively reduces the pressure loss of valve.
Valve seat 7 of the present utility model realizes effectively sealing by interference fit with valve body 1, and valve plate and valve seat are sealed by integral spherical, wherein, the outer middle side part of described valve seat is formed with multiple interval and arranges and the reinforcement that axially extends is with relative valve body fixed valve base, when making valve in working order, seal stable, reliable, make valve plate contact with valve seat better simultaneously, ensure that valve plate seals, and reduce valve torque.
Preferably, described valve seat is exoskeletal valve seat, and valve seat adopts reinforced grid design, and rubber thickness is big, compression resilience is excellent, so that moment of torsion reduce, and with valve body interference seal, sealing effectiveness is better, valve seat can make multiple quality of rubber materials, to be suitable for various different operating mode, valve seat is replaceable simultaneously, it is achieved product is the different operating mode of convenient and swift application after exchanging valve seat.
The above is only preferred implementation of the present utility model; it should be noted that; for those skilled in the art; under the premise without departing from this utility model principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (7)
1. a soft sealing butterfly valve, it is characterized in that, including cast iron valve body, changeable type rubber valve seat with described cast iron valve body interference fit, cast iron valve plate, and upper valve shaft and lower valve shaft, the sealing surface of described cast iron valve plate is provided with epoxy resin enamelled coating, described epoxy resin enamelled coating is in overall sphere.
2. soft sealing butterfly valve as claimed in claim 1, it is characterised in that the width of described sealing surface is at 3-5mm.
3. soft sealing butterfly valve as claimed in claim 1, it is characterised in that described cast iron valve plate is spheroidal graphite cast-iron.
4. soft sealing butterfly valve as claimed in claim 1, it is characterised in that the thickness of described epoxy resin enamelled coating is 0.125mm-0.175mm.
5. soft sealing butterfly valve as claimed in claim 1, it is characterised in that described valve seat is exoskeletal quality of rubber materials valve seat.
6. soft sealing butterfly valve as claimed in claim 5, it is characterised in that the outer middle side part of described valve seat is formed with reinforcement that multiple interval arranges and axially extend with relative valve body fixed valve base.
7. soft sealing butterfly valve as claimed in claim 1, it is characterized in that, the lower valve port place of described cast iron valve body is provided with lower plug cover, described lower plug cover is connected by screw thread and described lower valve shaft lower end are fixing, meanwhile, jump ring it is provided with between described lower valve shaft lower end and valve body to prevent it from going out downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521048291.8U CN205371652U (en) | 2015-12-15 | 2015-12-15 | Soft -sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521048291.8U CN205371652U (en) | 2015-12-15 | 2015-12-15 | Soft -sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205371652U true CN205371652U (en) | 2016-07-06 |
Family
ID=56280883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521048291.8U Active CN205371652U (en) | 2015-12-15 | 2015-12-15 | Soft -sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205371652U (en) |
-
2015
- 2015-12-15 CN CN201521048291.8U patent/CN205371652U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |