CN2210987Y - Low-position open-close branch-controlling valve of non-return sandwich diaphragm - Google Patents
Low-position open-close branch-controlling valve of non-return sandwich diaphragm Download PDFInfo
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- CN2210987Y CN2210987Y CN 95201974 CN95201974U CN2210987Y CN 2210987 Y CN2210987 Y CN 2210987Y CN 95201974 CN95201974 CN 95201974 CN 95201974 U CN95201974 U CN 95201974U CN 2210987 Y CN2210987 Y CN 2210987Y
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- valve
- lamina membranacea
- chamber
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- ball
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Abstract
The utility model relates to a low-position open-close branch-control valve of a non-return sandwich diaphragm, which is improved on the basis of a basic structure of an existing branch-control diaphragm type leading valve. The utility model overcomes the problem of large flow resistance by lowering the open-close position of a seal ring and enlarging a flow area. The compressive strength of the diaphragm is increased by a built-in metal liner, and deformation is reduced. Mediums in a back-pressure chamber are prevented from returning back to an injection chamber by installing a ball valve on a membrane. A break-angle mode of a diaphragm flanging is changed into a round-angle mode, and the service life and rotary flexibility are enhanced.
Description
The utility model relates to a kind of tributary controlling diaphragm chip Leading valve, and particularly a kind of non-return interlayer lamina membranacea low level open-close type props up the control valve.
Tributary control diaphragm flow-regulating type Leading valve (patent No. 92226433), have simple in structure, be convenient to maintenance, easy to operate, be beneficial to advantage such as piping network centralized control, but in implementation process, but have following problem:
1, flow resistance is bigger.At valve opening state, the circulation area that medium enters the ingress of discharge chamber only accounts for the 50%-60% that injects the chamber circulation area, and the specified value of its flow resistance coefficient and national valve industry is at a distance of bigger.The last plane of its overflow ring and the distance of discharge chamber shaft axis are greater than the radius of discharge chamber.This is the bigger main cause of flow resistance.
2, the diaphragm upset is dumb.The bending place of diaphragm flange is the knuckle shape, causes hoisting capacity bigger, and tumble ratio is more blunt, and it is concentrated to make the knuckle place produce stress easily, and diaphragm is damaged.
3, the poor sealing performance of diaphragm.The upper and lower surface of diaphragm is by the steel plate clamping, and improving the sealing stability of diaphragm, but steel plate easily deforms after fastening by screw, and the diaphragm that is held also deforms thereupon, so sealability is undesirable.
4, the pressure medium in injecting the chamber is less than the pressure of back pressure chamber, and the medium of back pressure chamber can be back to along throttle orifice and inject the chamber, and under specific technological requirement, this backflow does not allow to exist.
The purpose of this utility model will provide a kind of non-return interlayer lamina membranacea low level open-close type to prop up the control valve exactly.It adopts the low level opening/shutting mode, increases circulation area, reduces flow resistance coefficient; And make fillet in the flange bending place of lamina membranacea, and make flexible overturning, adopt built-in sandwich clad steel, increase the intensity of pressing plate, overcome the pressing plate distortion, adopt ball valve that the passage that injects chamber and back pressure chamber is controlled, prevent medium back flow.
The utility model is achieved in that on the basic structure basis of tributary control diaphragm flow-regulating type Leading valve and improves.The lamina membranacea that comprises pressing between valve body, valve gap, valve body and the valve gap of tributary control diaphragm flow-regulating type Leading valve, and still the flange by the pressing lamina membranacea seals.Lamina membranacea is separated into the cavity between valve body and the valve gap back pressure chamber together, injects chamber and discharge chamber with seal ring.Be communicated with by affluent hole between back pressure chamber and the discharge chamber.And feature of the present utility model is on the said structure basis, make the sealing surface of seal ring (being the overflow ring of indication in the prior art) low to falling, be the radius of the distance of the last sealing surface of seal ring and the residing shaft axis of discharge chamber less than discharge chamber, so just can increase circulation area, reduce flow resistance coefficient.In addition, lamina membranacea is to be made of flange and pressing plate, and pressing plate is built-in with metal backing, metal backing be wrapped with flexible material and with flange be one, the diameter of pressing plate is greater than or equal to the diameter of sealing surface.The bending place change knuckle shape in the past of the flange of lamina membranacea is into circular-arc, and its purpose is exactly to improve the flexible overturning of lamina membranacea, the working life that also is to improve flange.On lamina membranacea, the joint place of lamina membranacea and sealing surface changes boss into by plane in the past, to improve sealability.In order to increase the intensity of pressing plate, pressing plate is from the edge to the center, and its thickness is thickeied gradually.Moreover, for having under the situation of pressure less than the pressure in the back-pressure plate in the injection chamber, the medium that prevents back pressure chamber do not reflux, on pressing plate, adorn a self-dumping type ball valve especially, and this ball valve is communicated with injection chamber and back pressure chamber.The medium that injects the chamber can enter back pressure chamber along ball valve, and the medium of back pressure chamber anti-backflow under the effect of ball valve enters injects the chamber.The valve body of this ball valve is a step hole, and the aperture, bottom is less than the valve ball diameter, and the aperture, top is greater than the valve ball diameter.
The utility model adopts the low level opening/shutting mode, and compared with prior art, it has increased circulation area most possibly, thereby solves the big problem of flow resistance; Lamina membranacea adopts built-in sandwich clad steel, to increase the intensity of pressing plate, overcomes the disadvantage that easily deforms in the pressure effect; The fillet form is adopted in flange bending place at lamina membranacea, not only reduces the tilting force of lamina membranacea flange, makes its flexible movements, and can prolong its working life; Utilize the self-dumping type ball valve that the passage that injects chamber and back pressure chamber is controlled, thereby solved the medium back flow problem at all; In addition, at the lamina membranacea position of fitting with sealing surface, be provided with the boss of sealing usefulness, this sealing means with boss is reliable and stable than plane sealing.
Fig. 1 is the utility model internal structure schematic representation.
Fig. 2 is the utility model lamina membranacea structural representation.
With reference to Fig. 1.1. affluent hole, a 2. control valve, 3. exhaust port, 4. lamina membranacea, 5. pressing plate, 6. valve ball, 7. ball valve, 8. seal ring, 9. valve body, 10. bolt hole, 11. valve gap bolts, 12. back pressure chambers, 13. valve gaps, 14. discharge chamber, 15. inject chambeies, 16. sealing surfaces, 17. axis.
As we can see from the figure, its structure is compared with the prior art that provides, and is basic identical, but its feature is the last front cover (16) of seal ring (8) and the radius of the distance of axis (17) less than discharge chamber (14).Like this, because sealing surface draws close to the axle center, its drainage port (3) that enters discharge chamber can enlarge along with sealing surface and axle center (17) dwindling of distance, thus but the problem that the solution circulation area is little, flow resistance is big.
For the backflow phenomenon that prevents to produce under the pressure of medium in injecting the chamber in the back pressure chamber is less than the pressure condition in the back pressure chamber, at the lamina membranacea middle part ball valve (7) is housed especially, enter back pressure chamber (12) before when injecting under the effect of chamber (15) medium at pressure, must at first after backing down valve ball (6), ball valve enter back pressure chamber, pressure in injecting the chamber is during less than the pressure in the back pressure chamber, valve ball (6) reposition that falls again prevents medium back flow.Step hole in the valve body of ball valve (7), aperture, bottom are less than the ball valve diameter, and the aperture, top is greater than the ball valve diameter, and upper end-hole place, the residing aperture of valve ball has one to prevent that valve ball from taking off the fancy top cap of mouth, and this fancy top cap only prevents that valve ball from coming off, and does not influence passing through of medium.The fancy top cap is connected with ball valve with screw thread.
With reference to Fig. 2.18. ball valve orifice, 19. boss, 20. flanges, 21. flange, 22. pressing plates, 23. fillets, 24. fillets.
Lamina membranacea (4) is made of flange (21) and pressing plate (22), and the diameter of pressing plate (22) is greater than or equal to the diameter of sealing surface (16).Pressing plate (22) is built-in with metal backing (5), and metal backing (5) is wrapped with the flexible resilient material, as rubber.The flexible resilient material of indication and flange (21) are one.In order to increase the ability to bear of pressing plate, to prevent distortion, pressing plate (5) is from the edge to the center, and its thickness is thickeied gradually.The bending place (23) of the flange (21) of lamina membranacea (4), (24) are circular-arc, and its purpose is to improve its flexible overturning and life-span.In order to improve sealability, be shaped on all boss (19) especially in the pressing plate bottom surface, the sealing surface of itself and seal ring is fitted.
Flange (20) periphery is by valve body (19) and valve gap (13) pressing, to play fixing and seal action.
The external diameter of ball valve body and ball valve orifice (18) secure fit.
In the using process, medium enters back pressure chamber (12) (at this moment from injecting chamber (15) along ball valve (7), the affluent hole control valve is in closed condition), the pressure medium in the back pressure chamber makes lamina membranacea (4) fit with sealing surface (16) and seals, and valve promptly is in closed condition.If the affluent hole control valve is opened, the pressure medium in the back pressure chamber is less than the pressure medium that injects in the chamber, and lamina membranacea promptly can upwards overturn, and the medium that injects the chamber then enters discharge chamber through drainage port (3), means that promptly valve is an opening state.If close the affluent hole control valve again, the medium in the injection chamber pressure medium in ball valve makes back pressure chamber again makes valve recover closed condition greater than the pressure medium that injects in the chamber again.
Claims (3)
1, a kind of non-return interlayer lamina membranacea low level open-close type props up the control valve, the lamina membranacea (4) that comprises pressing between valve body (9), valve gap (13), valve body and the valve gap, and the sealing of the flange (20) by pressing lamina membranacea (4), and same seal ring (8) is separated into valve body and cavity between the valve gap back pressure chamber (12) together, injects chamber (15), is communicated with by affluent hole (1) between discharge chamber (14), back pressure chamber and the discharge chamber, and it is characterized in that: the last sealing surface (16) of seal ring (8) and the distance of axis (17) are less than the radius of discharge chamber (14); Lamina membranacea (4) is made of flange (21) and pressing plate (22), and the diameter of pressing plate (22) is greater than or equal to the diameter of sealing surface (16); Pressing plate (22) is built-in with metal backing (5), metal backing (5) be wrapped with the flexible resilient material and with flange be one; One ball valve (7) is arranged on pressing plate (22), be communicated with and inject chamber and back pressure chamber.
2, the position open-close type props up the control valve at the bottom of the non-return interlayer lamina membranacea according to claim 1, it is characterized in that: bending place (23), (24) of the flange (21) on the lamina membranacea (4) are circular-arc; Lamina membranacea (4) is a boss (19) with the sealing surface joint place; Pressing plate (5) is from the edge to the center, and its thickness is thickeied gradually.
3, non-return interlayer lamina membranacea low level open-close type according to claim 1 props up the control valve, it is characterized in that: be step hole in ball valve (7) valve body, the aperture, bottom is less than the valve ball diameter, and the aperture, top is greater than the valve ball diameter, and upper end-hole place, the residing aperture of valve ball has one to prevent that valve ball from taking off the fancy top cap of mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95201974 CN2210987Y (en) | 1995-01-23 | 1995-01-23 | Low-position open-close branch-controlling valve of non-return sandwich diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95201974 CN2210987Y (en) | 1995-01-23 | 1995-01-23 | Low-position open-close branch-controlling valve of non-return sandwich diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2210987Y true CN2210987Y (en) | 1995-10-25 |
Family
ID=33855261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95201974 Expired - Fee Related CN2210987Y (en) | 1995-01-23 | 1995-01-23 | Low-position open-close branch-controlling valve of non-return sandwich diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2210987Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671986A (en) * | 2013-12-02 | 2014-03-26 | 东正科技有限公司 | Back pressure valve |
| CN108278398A (en) * | 2018-03-20 | 2018-07-13 | 徐锋 | Inner pressed flow control valve |
-
1995
- 1995-01-23 CN CN 95201974 patent/CN2210987Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671986A (en) * | 2013-12-02 | 2014-03-26 | 东正科技有限公司 | Back pressure valve |
| CN108278398A (en) * | 2018-03-20 | 2018-07-13 | 徐锋 | Inner pressed flow control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |