CN207421471U - A kind of butterfly valve stem structure and the butterfly valve with the stem structure - Google Patents
A kind of butterfly valve stem structure and the butterfly valve with the stem structure Download PDFInfo
- Publication number
- CN207421471U CN207421471U CN201721266067.5U CN201721266067U CN207421471U CN 207421471 U CN207421471 U CN 207421471U CN 201721266067 U CN201721266067 U CN 201721266067U CN 207421471 U CN207421471 U CN 207421471U
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- valve stem
- main valve
- butterfly valve
- margin
- stem structure
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Abstract
The utility model, which provides a kind of butterfly valve stem structure and the butterfly valve with the stem structure, the butterfly valve stem structure, to be included：Main valve stem, bottom are provided with thimble counterbore；The margin being fixed at below main valve stem；Be arranged on above margin and with the steel ball of thimble counterbore cooperation, be used for so that main valve stem coordinates with it is rotated above margin；Be set in main valve stem top filler and, be set in the packing press ring on main valve stem top, be located at the top of filler；The diameter of the steel ball is more than the depth of the thimble counterbore, for reducing the contact area of valve rod and margin；The top of the main valve stem is coarser than lower part, for compressing packing press ring, so that the filler and main valve stem below packing press ring generate interference.After the butterfly valve stem structure, butterfly valve is readily able to be packed into valve body when installing valve rod, reduces the Master Cost of main valve stem, reduces it and rotarily open torque, reduce the excessive wear of sealing ring, adds two sealing protections of butterfly valve.
Description
Technical field
The utility model is related to fluid control device technical fields, and in particular to a kind of butterfly valve stem structure and with the valve
The butterfly valve of rod structure.
Background technology
Butterfly valve is a type of valve, it is characterised in that 90 ° of switches are swift in motion, and can use manually, pneumatically, liquid
It is dynamic, a variety of operation patterns such as electronic.But there are following serious problems for butterfly valve stem structure common at present：Its valve rod is upper and lower
With the whole root architecture of diameter, there is assembling difficulty, waste of material rotarily opens the problem of torque is big, while also there are sealing rings
Excessive wear, valve rod upper end is without the situation of two protection.
Utility model content
The purpose of this utility model is to provide a kind of butterfly valve stem structure and the butterfly valve with the stem structure, in solution
State problem of the prior art.
In order to achieve the above objectives, the utility model provides a kind of butterfly valve stem structure, including：
Main valve stem, bottom are provided with thimble counterbore；
The margin being fixed at below main valve stem；
The steel ball for being arranged on above margin and coordinating with thimble counterbore, is used for so that main valve stem coordinates with it in margin
Side rotates；
Be set in main valve stem top filler and,
The packing press ring on main valve stem top is set in, is located at the top of filler；
The diameter of the steel ball is more than the depth of the thimble counterbore, for reducing the contact area of valve rod and margin；
The top of the main valve stem is coarser than lower part, for compressing packing press ring, so that below packing press ring
Filler and main valve stem generate interference.
Above-mentioned butterfly valve stem structure, wherein, the bottom of the main valve stem is provided with chamfering.
Above-mentioned butterfly valve stem structure, wherein, the material of the main valve stem is stainless steel.
Above-mentioned butterfly valve stem structure, wherein, the material of the margin is iron.
Above-mentioned butterfly valve stem structure, wherein, the material of the filler is rubber.
Above-mentioned butterfly valve stem structure, wherein, the value of the surface roughness Ra in the middle part of the main valve stem is less than or equal to 0.2
μm。
The utility model additionally provides a kind of butterfly valve, including above-mentioned butterfly valve stem structure.
It is had the advantages that compared with prior art the utility model：
By the way that margin is set to reduce the length of main valve stem, material is reduced the utility model for the main valve pole length of stainless steel
It is replaced afterwards with material by the margin of iron, to save material；Main valve stem realizes master by the thimble counterbore of its bottom with steel ball cooperation
Valve rod rotates, and can reduce the contact area of main valve stem and margin, so as to reduce valve torque；Under the top of main valve stem is slightly coarser than
Portion's body so that main valve stem top is by squeezing packing press ring so that filler and main valve stem generate interference, form two sealings and protect
Shield.The surface roughness at the middle part of main valve stem is relatively low, is butterfly plate and sealing ring with cooperation in the middle part of main valve stem, relatively low surface
Roughness can ensure the service life of sealing ring.
Description of the drawings
Fig. 1 is installed on the structure diagram after butterfly valve for the utility model butterfly valve valve rod.
Specific embodiment
Below in conjunction with attached drawing, by specific embodiment, the utility model will be further described, these embodiments are only used for
Illustrate the utility model, be not the limitation to scope of protection of the utility model.
As shown in Figure 1, the utility model provides a kind of butterfly valve stem structure, including：
Main valve stem 1, bottom are provided with thimble counterbore；
It is fixed at the margin 2 of 1 lower section of main valve stem；
Be arranged on the top of margin 2 and with the steel ball 3 of thimble counterbore cooperation, be used for so that main valve stem 1 coordinates with it is padding
First 2 top rotates, to reduce the unlatching resistance of main valve stem 1；
Be set in 1 top of main valve stem filler 4 and,
The packing press ring 5 on 1 top of main valve stem is set in, is located at the top of filler 4；
The diameter of the steel ball 3 is more than the depth of the thimble counterbore, for reducing the contact area of valve rod and margin 2；
The top of the main valve stem 1 is coarser than lower part, for compressing packing press ring 5, so that positioned at 5 lower section of packing press ring
Filler 4 and main valve stem 1 generate interference, formed two sealing.
The bottom of the main valve stem 1 is provided with chamfering 6, in order to which main valve stem 1 is installed in butterfly valve body.
The material of the main valve stem 1 is stainless steel.The material of the margin 2 is iron, to save material cost.The filler
4 material is rubber, realizes the effect of two sealings.
1 middle part of main valve stem has relatively low surface roughness, and (value of its surface roughness Ra is less than or equal to 0.2 μ
M), it is butterfly valve butterfly plate in itself and sealing ring 7, relatively low surface roughness can reduce close with the cooperation of the middle part of main valve stem 1
The wear intensity of seal 7, to ensure the service life of sealing ring 7.
The utility model additionally provides a kind of butterfly valve, including above-mentioned butterfly valve stem structure.
In conclusion after using the butterfly valve stem structure, butterfly valve is readily able to be packed into valve body when installing valve rod, reduces master
The Master Cost of valve rod reduces it and rotarily opens torque, reduces the excessive wear of sealing ring, adds two sealings of butterfly valve
Protection.
Although the content of the utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as the limitation to the utility model.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the scope of protection of the utility model should be by appended
Claim limit.
Claims (7)
1. a kind of butterfly valve stem structure, which is characterized in that including：
Main valve stem, bottom are provided with thimble counterbore；
The margin being fixed at below main valve stem；
Be arranged on above margin and with the steel ball of thimble counterbore cooperation, be used for so that main valve stem coordinates above margin turn with it
It is dynamic；
Be set in main valve stem top filler and,
The packing press ring on main valve stem top is set in, is located at the top of filler；
The diameter of the steel ball is more than the depth of the thimble counterbore, for reducing the contact area of valve rod and margin；
The top of the main valve stem is coarser than lower part, for compressing packing press ring, so that the filler below packing press ring
Interference is generated with main valve stem.
2. butterfly valve stem structure as described in claim 1, which is characterized in that the bottom of the main valve stem is provided with chamfering.
3. butterfly valve stem structure as described in claim 1, which is characterized in that the material of the main valve stem is stainless steel.
4. butterfly valve stem structure as described in claim 1, which is characterized in that the material of the margin is iron.
5. butterfly valve stem structure as described in claim 1, which is characterized in that the material of the filler is rubber.
6. butterfly valve stem structure as described in claim 1, which is characterized in that surface roughness Ra in the middle part of the main valve stem
It is worth for less than or equal to 0.2 μm.
7. a kind of butterfly valve, which is characterized in that including the butterfly valve stem structure as described in any one in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721266067.5U CN207421471U (en) | 2017-09-29 | 2017-09-29 | A kind of butterfly valve stem structure and the butterfly valve with the stem structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721266067.5U CN207421471U (en) | 2017-09-29 | 2017-09-29 | A kind of butterfly valve stem structure and the butterfly valve with the stem structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207421471U true CN207421471U (en) | 2018-05-29 |
Family
ID=62313155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721266067.5U Active CN207421471U (en) | 2017-09-29 | 2017-09-29 | A kind of butterfly valve stem structure and the butterfly valve with the stem structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207421471U (en) |
-
2017
- 2017-09-29 CN CN201721266067.5U patent/CN207421471U/en active Active
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| GR01 | Patent grant |