CN208503574U - A kind of non-return shut-off valve - Google Patents
A kind of non-return shut-off valve Download PDFInfo
- Publication number
- CN208503574U CN208503574U CN201820792643.8U CN201820792643U CN208503574U CN 208503574 U CN208503574 U CN 208503574U CN 201820792643 U CN201820792643 U CN 201820792643U CN 208503574 U CN208503574 U CN 208503574U
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- valve
- sphere
- seat
- return
- return shut
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Abstract
The utility model relates to a kind of non-return shut-off valves, including valve body, valve rod, valve deck, transmission mechanism, valve seat is set between valve body import channel and exit passageway, valve channel center line be horizontally mounted on pipeline, valve rod upper end is connect with transmission mechanism, and airtight and watertight padding is arranged between valve rod periphery and valve deck；One sphere is mainly set in valve seat outlet side valve chamber, and valve base sealing is cooperated using the spherical seal surface of conical seal (contact) face and sphere, and grid type limiting cylinder is arranged between plane and valve chamber on the valve seat of conical seal (contact) face periphery.The features such as in reverse media pressure, reverse media pressure seals sphere and seat compression after being superimposed with sphere weight, has reversed truncation flexibly, quickly, non-return reliable performance, good to valve body import side apparatus protective value.Suitable for the hydraulic turbine, pumping plant discharge control valve.
Description
Technical field
The utility model belongs to valve field more particularly to a kind of valve with cut-off and non-return dual function.This reality
It is suitable for the hydraulic turbine, pumping plant discharge control valve with novel.
Background technique
Cut-off type check-valves has the function of truncation and unidirectionally controlled pipeline, such as Chinese patent ZL201320308169.4
Non-return shut-off valve, structure include valve body, valve seat, flap, valve rod, valve deck, transmission mechanism, and valve rod upper end connects driver
Structure, lower end and flap floating connection.When transmission mechanism closed state, flap can be forcibly closed with valve seat by valve rod close
Envelope, the operating function with shut-off valve truncation pipeline fluid；When transmission mechanism open state, flap is pushed by positive pressure medium
It opens, reverse media pressure, which pushes, closes, and has the function of check-valves.Its major defect is: in flap by positive pressure medium
The moment in the open state for being transformed into reverse media pressure under effect, reverse media high speed flow through flap lower plane and valve seat it
Between, to flap lower plane generate upwards thrust, while reverse media to flap generate radial thrust, cause flap cannot quickly,
Flexibly moved down from valve rod, it is reversed to be truncated that reliability is poor, the moment water hammer that reverse media generates be easy to cause the hydraulic turbine,
The damage of the equipment such as pump, it is poor to equipment protection performance.
Summary of the invention
The utility model is to provide the reversed truncation of one kind quickly, flexibly, non-return performance for disadvantage of the existing technology
Reliably, the non-return shut-off valve good to inlet side equipment protection performance.
The technical solution of the utility model includes valve body, valve rod, valve deck, transmission mechanism, in valve body import channel and outlet
Valve seat is set between channel, and valve channel center line is horizontally mounted on pipeline, and valve rod upper end is connect with transmission mechanism, outside valve rod
Airtight and watertight padding is set between disc and valve deck；One sphere is mainly set in valve seat outlet side valve chamber, and valve base sealing uses taper
The spherical seal surface of sealing surface and sphere cooperates, and net is arranged between plane and valve chamber on the valve seat of conical seal (contact) face periphery
Lattice limiting cylinder.
Preferably, valve rod lower end surface has the concave spherical surface of curved surface identical as sphere.
Preferably, grid type limiting cylinder uses stainless steel cylinder, which is closing steel-tube construction, on
Portion is network.
Preferably, sphere uses hollow steel ball.
The utility model has the advantages that sphere is arranged in valve seat outlet side, under truncation state, valve rod compresses sphere and valve
Seat sealing surface, which cooperates, to be sealed；Under positive open state, positive pressure medium overcomes sphere weight to push sphere opening valve open
Door；In reverse media pressure, reverse media pressure seals sphere and seat compression after being superimposed with sphere weight, has reversed
The features such as truncation is flexible, quick, non-return reliable performance, good to valve body import side apparatus protective value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Non-return shut-off valve as shown in Figure 1, including valve body 1, valve rod 4, valve deck 5, transmission mechanism 6 are logical in 1 import of valve body
Valve seat is set between road and exit passageway, and 1 channel centerline of valve body is horizontally installed on pipeline, 4 upper end of valve rod and transmission mechanism 6
Connection, is arranged airtight and watertight padding between 4 periphery of valve rod and valve deck 5；One sphere 3, valve base sealing are set in valve seat outlet side valve chamber
Face is cooperated using the spherical seal surface of conical seal (contact) face and sphere 3, the conical seal (contact) face upper port diameter of valve seat upper surface
It greater than 3 diameter of sphere, prevents reverse media from pushing open and seals against each other mated condition between sphere 3 and valve seat, improve to reverse media
The reliability of non-return effect.The weight of sphere 3 is determining according to applying working condition medium cracking pressure, the valve in conical seal (contact) face periphery
Grid type limiting cylinder 2 is set between plane and valve chamber on seat, which is limited in valve seat spherical shape for sphere 3
In valve chamber above sealing surface, and there is the good medium flow field general character, it is small to the flow resistance of medium.
4 lower end surface of valve rod has the concave spherical surface of curved surface identical as sphere 3, increases being pressed into contact between valve rod 4 and sphere 3
Area improves sealing performance when truncation.
Grid type limiting cylinder 2 uses stainless steel cylinder, which is closing steel-tube construction, and top is net
Lattice structure, upper part network position have biggish circulating window, circulation window of the medium from 2 top of grid type limiting cylinder
Mouth passes through, and reduces reverse media to the lateral thrust of sphere 3, improves the reversed non-return sealing performance between sphere 3 and valve seat.
Sphere 3 use hollow steel ball, can also use nonmetallic rubber ball body, according to use mixture condition selection design.
Claims (7)
1. a kind of non-return shut-off valve, including valve body (1), valve rod (4), valve deck (5), transmission mechanism (6), in valve body (1) import
Valve seat is set between channel and exit passageway, and valve body (1) channel centerline is horizontally installed on pipeline, valve rod (4) upper end and biography
Motivation structure (6) connection；It is characterized in that a sphere (3) are arranged in valve seat outlet side valve chamber, sealing surface of seat uses conical seal (contact) face
It cooperates with the spherical seal surface of sphere (3), grid is set between plane and valve chamber on the valve seat of conical seal (contact) face periphery
Type limiting cylinder (2).
2. non-return shut-off valve according to claim 1, it is characterized in that valve rod (4) lower end surface is with identical as sphere (3)
The concave spherical surface of curved surface.
3. non-return shut-off valve according to claim 1 or 2, it is characterized in that grid type limiting cylinder (2) uses stainless steel
Cylinder, the stainless steel cylinder lower part are closing steel-tube construction, and top is network.
4. non-return shut-off valve according to claim 1 or 2, it is characterized in that sphere (3) uses hollow steel ball.
5. non-return shut-off valve according to claim 3, it is characterized in that sphere (3) uses hollow steel ball.
6. non-return shut-off valve according to claim 1 or 2, it is characterized in that sphere (3) uses rubber ball body.
7. non-return shut-off valve according to claim 3, it is characterized in that sphere (3) uses rubber ball body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820792643.8U CN208503574U (en) | 2018-05-25 | 2018-05-25 | A kind of non-return shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820792643.8U CN208503574U (en) | 2018-05-25 | 2018-05-25 | A kind of non-return shut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208503574U true CN208503574U (en) | 2019-02-15 |
Family
ID=65293872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820792643.8U Active CN208503574U (en) | 2018-05-25 | 2018-05-25 | A kind of non-return shut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208503574U (en) |
-
2018
- 2018-05-25 CN CN201820792643.8U patent/CN208503574U/en active Active
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