CN101435515B - Air pressure type normally-closed pneumatic diaphragm valve - Google Patents
Air pressure type normally-closed pneumatic diaphragm valve Download PDFInfo
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- CN101435515B CN101435515B CN2008102097449A CN200810209744A CN101435515B CN 101435515 B CN101435515 B CN 101435515B CN 2008102097449 A CN2008102097449 A CN 2008102097449A CN 200810209744 A CN200810209744 A CN 200810209744A CN 101435515 B CN101435515 B CN 101435515B
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- valve
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- air chamber
- pneumatic diaphragm
- closed pneumatic
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Abstract
The invention provides an air pressure type normally closed pneumatic diaphragm valve and belongs to the technical field of diaphragm valves. The invention solves the problems of low sealing pressure, big volume and heavy weight of the large caliber (more than DN150) normally closed pneumatic diaphragm valves. The valve is arranged in an air chamber and is closed by an acting force formed in the mode of storing and sealing air pressure in advance. At present, the prior normally closed pneumatic diaphragm valve is closed by the action of an elastic force, but the sealing pressure of the valve with DN150 caliber is only 0.6MPa, the sealing pressure of the valve with DN200 caliber is only 0.4MPa, and the sealing pressure of the valve with DN250 caliber is only 0.2MPa; and the prior normally closed pneumatic diaphragm valve is big and heavy. The sealing pressure of the air pressure type normally closed pneumatic diaphragm valve reaches 1.6MPa; compared with the prior normally closed pneumatic diaphragm valve in the same specification, the air pressure type normally closed pneumatic diaphragm valve has smaller volume and lighter weight; moreover, the valve can also be used as a normally opened valve.
Description
(1) technical field
The invention belongs to the membrane valve technical field.Particularly a kind of usefulness stores seal compression gas in advance, as the normal close type pneumatic diaphragm valve of valve closing power.
(2) background technique
Membrane valve is widely used in fields such as papermaking, wine brewing, sugaring, starch, pharmacy, oil, chemical industry, thermoelectricity, uses on corrosivity, non-aggressive and the fluid production line with small-particle suspension.It is the opening/closing mechanism that the control fluid flows.Membrane valve can be according to the fluid difference, and the corrosivity difference under different temperatures is selected valve body lining material and diaphragm material targetedly.This valve is constructed because of no stuffing box, does not have dynamic sealing point, and closing in the valve is that the pressured elastic diaphragm that contracts is finished, thereby stopped fluid run, drip, leak problem.
Pneumatic diaphragm valve is exactly the membrane valve that pneumatically is opened or closed, and it mainly is used on the telecontrol.Can not be divided into by there being the control free state: normal close type (the free state valve is closed); Open type (the free state valve is opened).
At present existing normal close type pneumatic diaphragm valve close all be by spring force be used for finish.Heavy caliber (more than the DN150) valve particularly, sealing load is low, volume is big, heavy.Because cause specifics such as the anticorrosive property of this valve, inside and outside sealing can not be gone beyond some special occasions.Bring very big trouble so just for applying unit and project planner, can only adopt avoidance, local step-down or local method of boosting to solve, must cause very big waste like this.
(3) summary of the invention
Air pressure type normally-closed pneumatic diaphragm valve of the present invention is rational in infrastructure, good seal performance, working stability, and volume is little, in light weight, control system pressure is low.
The sealing load contrast of existing normal close type pneumatic diaphragm valve and air pressure type normally-closed pneumatic diaphragm valve sees Table
When changing intake method, this valve can be used as the open type pneumatic diaphragm valve.
Technological scheme:
At first use amount of compressed gas, enter C air chamber (8) and a air chamber (5) of being responsible for throttle down, under the effect of pressure, drive valve rod (4) and make valve closing by multi-stage gasbag.And storage sealing C air chamber (8) reaches, the gas of a air chamber (5) does not leak, to keep the normally off of valve.
(4) description of drawings
Fig. 1 is the air pressure type normally-closed pneumatic diaphragm valve plan view of invention
Fig. 2 is the air pressure type normally-closed pneumatic diaphragm valve left side sectional view of invention
Note among the figure:
1. handwheel 2. springs 3. pressure gauges 4. valve rod 5.a air chambers
6. air bag I 7.b air chamber 8.c air chamber 9. air bag II 10.d air chambers
11. valve gap 12. flaps 13. barrier films 14. valve bodies 15. check valves
16. outlet valve
(5) embodiment:
The present invention is a kind of air pressure type normally-closed pneumatic diaphragm valve.It is made up of handwheel (1), spring (2), pressure gauge (3), valve rod (4), a air chamber (5), air bag I (6), b air chamber (7), c air chamber (8), air bag II (9), d air chamber (10), valve gap (11), flap (12), barrier film (13), valve body (14), check valve (15), outlet valve (16).Its structure as Fig. 1, Fig. 2, shown in.
1. the embodiment when closing air pressure type normally-closed pneumatic diaphragm valve:
At first close outlet valve (16), pressurized gas is entered c air chamber (8) from check valve (15), and enter a air chamber (5) by the air flue in the valve rod (4), stop air inlet when observing pressure gauge (3) to rated pressure, be fixed on the air bag I (6), the air bag II (9) that send out on the bar (4) simultaneously and under the effect of c air chamber (8), a air chamber (5) pressure, promote valve rod (4) respectively, do downward axial displacement, and, make barrier film (13) be close to the purpose that valve body (14) bottom reaches throttle down by valve gap (11) drive flap (12).Store the pressurized gas of sealing a air chamber (5) and c air chamber (8), forever do not drain, to guarantee the valve normally off.
2. the embodiment when opening air pressure type normally-closed pneumatic diaphragm valve:
When needing Open valve, can allow pressurized gas enter d air chamber (10), and enter b air chamber (7) by another air flue in the valve rod (4), be fixed on the air bag I (6), the air bag II (9) that send out on the bar (4) simultaneously, under the effect of d air chamber (10), b air chamber (7) pressure, promote valve rod (4) respectively and do axial displacement upwards, and, barrier film (13) is upwards mentioned by valve gap (11) drive flap (12), make valve opening.During 1.6 times of left and right sides of the pressure gauge (3) of suction pressure when the valve closing state, valve can be opened fully.When getting rid of the pressurized gas of d air chamber (10) and b air chamber (7), valve stores under the pressure of seal compression gas in advance at a air chamber (5), c air chamber (8), valve is closed once more return to the valve normally off.
3. air pressure type normally-closed pneumatic diaphragm valve opens and closes under the air failure state
When source of the gas breaks down, open valve and outlet valve (16) can be opened, with the pressurized gas emptying that stores sealing in advance in a air chamber (5), the c air chamber (8), at this moment valve rod (4) to top offset, makes valve opening under the effect of spring (2).If at this moment again during throttle down, available handwheel (1) clockwise rotates overhead-valve bar (4) and does downward axial displacement, to reach the purpose of throttle down.After air failure is got rid of, make valve return to initial closed state by " embodiment when 1. closing air pressure type normally-closed pneumatic diaphragm valve " method, be rotated counterclockwise handwheel (1) then to peak.
4. the embodiment when air pressure type normally-closed pneumatic diaphragm valve changes the open type pneumatic diaphragm valve into:
Outlet valve (16) is opened, the pressurized gas in a air chamber (5) and the c air chamber (8) is drained, close outlet valve (16) then, unload check valve (15), at this moment valve rod (4) makes valve be in opening state to top offset under the effect of spring (2).-be the open type pneumatic diaphragm valve.If throttle down, pressurized gas can directly enter to a air chamber (5) from c air chamber (8), be fixed on the air bag I (6), the air bag II (9) that send out on the bar (4) and under the effect of c air chamber (8), a air chamber (5) pressure, promote valve rod (4) respectively, do downward axial displacement, make valve closing.
Claims (1)
1. air pressure type normally-closed pneumatic diaphragm valve, it is that outlet valve (16) is closed, and pressurized gas is entered c air chamber (8) from check valve (15), and enters a air chamber (5) by the air flue in the valve rod (4), stops air inlet when observing pressure gauge (3) to rated pressure; The air bag I (6), the air bag II (9) that are fixed on simultaneously on the valve rod (4) promote valve rod (4) respectively under the pressure effect of a air chamber (5), c air chamber (8), do downward axial displacement, valve rod (4) passes valve gap (11) and drives flap (12), makes barrier film (13) be close to the purpose that valve body (14) bottom reaches throttle down; The pressurized gas of a air chamber (5) and c air chamber (8) stores sealing, forever do not drain, to guarantee the valve normally off, it is characterized in that closing of membrane valve is by the seal compression gas that is stored in a air chamber (5) and c air chamber (8) in advance air bag I (6), the air bag II (9) that is fixed on the valve rod (4) to be formed active force, promote valve rod (4) and do downward axial displacement and finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102097449A CN101435515B (en) | 2008-12-22 | 2008-12-22 | Air pressure type normally-closed pneumatic diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102097449A CN101435515B (en) | 2008-12-22 | 2008-12-22 | Air pressure type normally-closed pneumatic diaphragm valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101435515A CN101435515A (en) | 2009-05-20 |
| CN101435515B true CN101435515B (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102097449A Expired - Fee Related CN101435515B (en) | 2008-12-22 | 2008-12-22 | Air pressure type normally-closed pneumatic diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101435515B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915230B (en) * | 2010-08-03 | 2013-01-30 | 清华大学 | Pneumatic actuator for water collection interface unit of vacuum drainage system |
| CN102032361B (en) * | 2010-12-28 | 2012-07-25 | 哈尔滨龙江防腐阀门有限公司 | High-performance normally-closed pneumatic diaphragm valve |
| CN113187905B (en) * | 2021-05-28 | 2022-11-18 | 深圳市伙伴气动精密机械有限公司 | Pneumatic stop valve and using method thereof |
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2008
- 2008-12-22 CN CN2008102097449A patent/CN101435515B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101435515A (en) | 2009-05-20 |
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Granted publication date: 20101124 Termination date: 20151222 |
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