CN208605652U - A kind of sealing structure of two way seal three-eccentric-butterfly-valve - Google Patents
A kind of sealing structure of two way seal three-eccentric-butterfly-valve Download PDFInfo
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- CN208605652U CN208605652U CN201821200651.5U CN201821200651U CN208605652U CN 208605652 U CN208605652 U CN 208605652U CN 201821200651 U CN201821200651 U CN 201821200651U CN 208605652 U CN208605652 U CN 208605652U
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- bonnet
- screwed
- union
- valve
- valve body
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Abstract
A kind of sealing structure of two way seal three-eccentric-butterfly-valve, including butterfly plate and valve seat, butterfly plate and valve base sealing cooperatively form sealing pair, valve seat is fixed on valve body by gland and union (screwed)bonnet (UB, it is connected through a screw thread between screw clamp plate and valve body, the screw pitch of union (screwed)bonnet (UB is less than the screw pitch of valve body, there is thread pitch between the two after connecting with valve body in union (screwed)bonnet (UB, its axial end face externally protrudes out in valve body surface after union (screwed)bonnet (UB is packed into valve body, pressing plate presses union (screwed)bonnet (UB and makes union (screwed)bonnet (UB axial displacement, valve seat is squeezed when union (screwed)bonnet (UB axial displacement, pressing plate is fixed by screws on valve body.The beneficial effects of the utility model are: under positive operating pressure, fixation of the union (screwed)bonnet (UB by screw thread and pressing plate, so that any offset will not occur for valve seat, double reaction plus of the butterfly plate by medium power and valve seat thrust, sealing effect is good；Under the operating pressure of opposite direction, valve seat will not be detached from optimal seal position as butterfly plate deforms, and keep reliable sealing.
Description
Technical field
The utility model relates to the sealing structures of a kind of butterfly valve, especially three-eccentric-butterfly-valve.
Background technique
Three-eccentric-butterfly-valve is widely used on the industrial pipelines such as metallurgy, electric power, petrochemical industry, as adjusting flow and truncation
Fluid uses, but three-eccentric-butterfly-valve can only have preferable sealing on medium downbeam, and eccentric-butterfly-valve is because of its valve rod and leads to
The presence of the eccentric structure at road center, the unit when medium power adverse current with the increase of pressure medium, between butterfly plate and valve seat
When normal pressure is less than medium pressure, sealing starts to leak, and is unable to satisfy reversed seal request.
Summary of the invention
The shortcomings that in order to overcome existing sealing structure, the utility model provide a kind of sealing of two way seal three-eccentric-butterfly-valve
Structure.
It is close technical solution adopted by the utility model to solve its technical problems is a kind of, two way seal three-eccentric-butterfly-valve
Seal structure, including butterfly plate and valve seat, butterfly plate and valve base sealing cooperatively form sealing pair, and valve seat is solid by pressing plate and union (screwed)bonnet (UB
It is scheduled on valve body, is connected through a screw thread between union (screwed)bonnet (UB and valve body, the screw pitch of union (screwed)bonnet (UB is less than the screw pitch of valve body, screw thread pressure
There is thread pitch in lid, its axial end face externally protrudes out in valve body table after union (screwed)bonnet (UB is packed into valve body between the two after connecting with valve body
Face, pressing plate press union (screwed)bonnet (UB and make union (screwed)bonnet (UB axial displacement, and thread pitch provides the space of union (screwed)bonnet (UB axial displacement,
Valve seat is squeezed when union (screwed)bonnet (UB axial displacement, pressing plate is fixed by screws on valve body.
The beneficial effects of the present invention are: fixation of the union (screwed)bonnet (UB by screw thread and pressing plate makes under positive operating pressure
Any possible offset will not occur for valve seat, double reaction plus of the butterfly plate by medium power and valve seat thrust, sealing effect is good；
Under the operating pressure of opposite direction, valve seat will not be detached from optimal seal position as butterfly plate deforms, and play automatic compensating action,
Keep reliable sealing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment.
In figure: 1. valve bodies；2. butterfly plate；3. valve seat；4. union (screwed)bonnet (UB；5. pressing plate；6. screw；7. thread pitch.
Specific embodiment
As shown in Figure 1, a kind of sealing structure of two way seal three-eccentric-butterfly-valve, including butterfly plate 2 and valve seat 3, butterfly plate 2 and valve
3 sealing of seat cooperatively forms sealing pair, and valve seat 3 is fixed on valve body 1 by pressing plate 5 and union (screwed)bonnet (UB 4, union (screwed)bonnet (UB 4 and valve
It is connected through a screw thread between body 1, the screw pitch of union (screwed)bonnet (UB 4 is less than the screw pitch of valve body 1, the two after union (screwed)bonnet (UB 4 is connect with valve body 1
Between there are thread pitch 7, its axial end face externally protrudes out in 1 surface of valve body after union (screwed)bonnet (UB 4 is packed into valve body 1, and pressing plate 5 presses screw thread
Gland 4 makes 4 axial displacement of union (screwed)bonnet (UB, and thread pitch 7 provides the space of 5 axial displacement of union (screwed)bonnet (UB, 4 axis of union (screwed)bonnet (UB
To valve seat 3 is squeezed when displacement, pressing plate 5 is fixed on valve body 1 by screw 6.
When assembly, since the axial end face of union (screwed)bonnet (UB 4 externally protrudes out in 1 surface of valve body, when by 6 fixation clip 5 of screw, make
4 axial displacement of union (screwed)bonnet (UB is obtained, and thread pitch 7 provides the space of 5 axial displacement of union (screwed)bonnet (UB, meanwhile, union (screwed)bonnet (UB 4 squeezes
Pressure valve seat 3, so that valve base sealing is relatively reliable, when forward direction sealing, dual work of the butterfly plate 2 by 3 thrust of medium power and valve seat
Firmly, when reversed sealing, the thrust of 2 valve seat 3 of butterfly plate, thrust is greater than medium power, therefore can guarantee the reliability reversely sealed.
Claims (1)
1. a kind of sealing structure of two way seal three-eccentric-butterfly-valve, including butterfly plate and valve seat, the butterfly plate and valve base sealing cooperate
Formed sealing pair, it is characterised in that: the valve seat is fixed on valve body by pressing plate and union (screwed)bonnet (UB, the union (screwed)bonnet (UB and
Be connected through a screw thread between valve body, the screw pitch of the union (screwed)bonnet (UB is less than the screw pitch of valve body, union (screwed)bonnet (UB connect with valve body after two
There are thread pitches between person, its axial end face externally protrudes out in valve body surface after the union (screwed)bonnet (UB is packed into valve body, and the pressing plate is tight
The union (screwed)bonnet (UB is pressed to make union (screwed)bonnet (UB axial displacement, the thread pitch provides the space of union (screwed)bonnet (UB axial displacement,
The valve seat is squeezed when the union (screwed)bonnet (UB axial displacement, the pressing plate is fixed by screws on valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821200651.5U CN208605652U (en) | 2018-07-27 | 2018-07-27 | A kind of sealing structure of two way seal three-eccentric-butterfly-valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821200651.5U CN208605652U (en) | 2018-07-27 | 2018-07-27 | A kind of sealing structure of two way seal three-eccentric-butterfly-valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208605652U true CN208605652U (en) | 2019-03-15 |
Family
ID=65671317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821200651.5U Active CN208605652U (en) | 2018-07-27 | 2018-07-27 | A kind of sealing structure of two way seal three-eccentric-butterfly-valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208605652U (en) |
-
2018
- 2018-07-27 CN CN201821200651.5U patent/CN208605652U/en active Active
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