CN2071737U - Valve for low pressure source - Google Patents
Valve for low pressure source Download PDFInfo
- Publication number
- CN2071737U CN2071737U CN 90212675 CN90212675U CN2071737U CN 2071737 U CN2071737 U CN 2071737U CN 90212675 CN90212675 CN 90212675 CN 90212675 U CN90212675 U CN 90212675U CN 2071737 U CN2071737 U CN 2071737U
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- main
- cylinder body
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a design plan of a low pressure source opening and closing valve, mainly comprising a valve body, a damper, a valve rod and a plurality of cylinders and pistons. In the utility model, a plurality of main cylinders, main pistons, one minor cylinder and one piston are installed at the same shaft line and in the same direction. When the utility model is opened and closed, liquid and gas pressure sources are additionally arranged on the lower end of the main and minor pistons to actuate the pistons to drive the valve rod and the damper to be lifted upward. When the valve is closed, the liquid and gas pressure sources are additionally arranged on the upper end of the main pistons in order to actuate the pistons to drive the valve rod and the damper to close the damper downward. Because the forces of the pistons are added into a resultant force, therefore, both lifting force and closing force are large.
Description
The utility model relates to a kind of industrial valve, a kind of with surge, pneumatic or manually be that the low pressure source of power opens and closes valve.
In big industrial production, during particularly petrochemical industry is produced, how to provide air pressure or hydraulic power to come opening/shutting valve by power station is concentrated.Because each corner is led in gas, the innumerable twists and turns of hydraulic pressure delivery line, or the pipeline speciality, often causes the pressure that provides at the valve end potential source to fall very lowly, some places drop to 2Kg/cm
2Even it is lower.At this moment, difficulty just takes place to open and close in existing single cylinder valve or twin-tub valve easily, especially in northern cold season, often because of the freezing valve cylinder body shrinkage flashboard that causes is blocked, card valve phenomenon takes place.
The purpose of this utility model provides a kind of keying valve that adapts to low pressure source, makes it just often finish keying at pressure, can normally open and close when pressure is very low again.
The purpose of this utility model reaches by following design proposal, is made up of main valve, control valve with the low pressure source valve that this scheme provides, and main valve and control valve combination coupling are to realize automatic control.Main valve is that the principle design of making a concerted effort forms by a plurality of power superpositions, mainly constitute by valve body, flashboard, valve rod and a plurality of cylinder body and piston, it is characterized in that: 1, a plurality of Master cylinder bodies, main piston and subsidiary cylinder, a sub-piston are installed on the same direction of same straight line, each main piston tandem arrangement cooperates on valve rod and with corresponding Master cylinder body, and sub-piston is connected through cover and valve rod and is contained in the subsidiary cylinder.2, the A mouth of control valve through one group advance discharge opeing, tracheae communicates with the cylinder body of each main piston and sub-piston lower end, the B mouth is organized into discharge opeing, tracheae through another and is communicated with each main piston upper end cylinder body.This structure makes when the breakdown valve flashboard, and pressure source is added in component on each main piston and the sub-piston and is one by superposition on same direction and makes a concerted effort; When throttle down, the component on each main piston also is one by superposition makes a concerted effort, and this unlatching or making a concerted effort of closing are very big, even thereby the occasion of falling very lowly at pressure also can realize normal keying.3, the sealing between each piston and the cylinder body is selected O type sealing rubber ring (GB1235-76) for use O type coil structures is simple to make full use of, advantages such as good seal performance, frictional force are little, groove dimensions Xiao Yi manufacturing in southern warm sector; Then select L type rubber seal (HG4-331-66) for use matching gap between O type circle packed-piston and cylinder body be little to avoid in northern cold area, cylinder body freezes the shortcoming that causes the piston up-down difficulty after contracting.4, be equipped with manual system, this system mainly is made up of handwheel, clutch nut, handle, cover etc.Clutch nut handgrip has two gears, and one is that the clutch nut is often opened gear, and one is closed gear.When often opening, the epimere screw mandrel position of clutch nut and valve rod breaks away from.At this moment available gas, the hydraulic power opening/shutting valve that is used as power; During the closure gear, the clutch nut is meshed with the screw mandrel of valve rod, at this moment available manual opening-closing valve.
Accompanying drawing is the utility model structural representation.Also be one of embodiment, in this example, main valve adopts two master cylinders (middle cylinder and upper cylinder half), main piston (middle piston and upper piston), secondary cylinder (following cylinder) sub-piston (lower piston).
1-valve body 7-lower piston
2-flashboard 8-seal ring
3-valve rod 9-lower clapboard
4-filler 10-relief opening
5-connecting base 11-cover
Piston among the 6-lower cylinder body 12-
Cylinder body 19-handwheel among the 13-
The 14-B mouth advances discharge opeing tracheae 20-clutch nut
15-upper clapboard 21-cover
16-upper piston 22-clutch nut handgrip
17-upper cylinder body 23-advances the discharge opeing tracheae
18-pull bar 24-control valve
Below in conjunction with accompanying drawing structure of the present utility model and operating principle are further specified.Open valve: handle control valve and make gas or hydraulic power flow to lower cylinder body 6 through the A mouth, middle cylinder body 13, the lower end of upper cylinder body 17 each piston, the promotion piston moves upward and promotes flashboards 2 by valve rod 3, also finally act on the valve rod on the piston 12 during wherein the lifting force of lower piston 7 passes to by cover 11, when upwards moving segment distance back piston upper end, lower piston 7 withstands lower clapboard 9 and stop motion, at this moment the gravity that overcomes the frictional force of valve rod and each parts contact position and mention flashboard 2 entirely upwards continues lifting by middle piston 12 and upper piston 16 to be finished, so 7 of lower pistons help out, it is overcoming the clamping force of flashboard, play booster action during frictional force, middle piston and upper piston then play main effect.Close valve: handle control valve, make the upper end of gas or hydraulic power cylinder body, upper cylinder body piston in the B mouth flows into, promote piston and move downward, the lower piston pushed home is closed flashboard through cover 11.See that from present embodiment the lifting of three piston generations is made a concerted effort bigger 3 times than existing habitual single cylinder valve lifting force, and is bigger by 40% than the lifting force of twin-tub valve, according to the size of on-the-spot use condition and pressure source pressure, master cylinder, main piston can be increased to more than three.
The utility model has the advantages that to can be applicable to petrochemical industry and other low pressure source occasion, by the very big hoisting capacity of superposition generation of many piston forces, thereby thoroughly solve the card valve phenomenon of normal generation in the production.
Claims (2)
1, a kind of low pressure source opens and closes valve, form by main valve, control valve, main valve and control valve are used in combination, to realize automatic control, main valve is made of valve body, flashboard, valve rod and cylinder body, piston, it is characterized in that: the Master cylinder body more than (1) two, main piston and subsidiary cylinder, a sub-piston are installed on the same direction of same straight line, and each main piston tandem arrangement cooperates on valve rod and with corresponding Master cylinder body; Sub-piston is connected through cover and valve rod and is contained in the subsidiary cylinder, the A mouth of (2) control valve through one group advance discharge opeing, tracheae communicates with the cylinder body of each main piston lower end, the B mouth through another organize into discharge opeing, tracheae communicates with each main piston upper end cylinder body.
2, open and close valve according to the described low pressure source of claim 1., its feature also is to be equipped with on the main valve body manual system, this system mainly is made up of handwheel, clutch nut, handle, cover etc., clutch nut handgrip has normal open and close to close two gears, when often opening, the epimere screw mandrel of clutch nut and valve rod breaks away from, and when closed, the clutch nut is meshed with the screw mandrel of valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212675 CN2071737U (en) | 1990-05-19 | 1990-05-19 | Valve for low pressure source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212675 CN2071737U (en) | 1990-05-19 | 1990-05-19 | Valve for low pressure source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2071737U true CN2071737U (en) | 1991-02-20 |
Family
ID=4892211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212675 Withdrawn CN2071737U (en) | 1990-05-19 | 1990-05-19 | Valve for low pressure source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2071737U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101878389A (en) * | 2007-09-27 | 2010-11-03 | 克马蒂克公司 | Valve actuator system |
| CN102434520A (en) * | 2011-12-12 | 2012-05-02 | 航天长征化学工程股份有限公司 | Gas-liquid mixing driving valve actuating mechanism |
| CN104500479A (en) * | 2014-12-23 | 2015-04-08 | 江苏远望仪器有限公司 | Automatic-manual linear-travel valve actuator |
-
1990
- 1990-05-19 CN CN 90212675 patent/CN2071737U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101878389A (en) * | 2007-09-27 | 2010-11-03 | 克马蒂克公司 | Valve actuator system |
| US8915480B2 (en) | 2007-09-27 | 2014-12-23 | Kmatic Aps | Valve actuator system |
| CN102434520A (en) * | 2011-12-12 | 2012-05-02 | 航天长征化学工程股份有限公司 | Gas-liquid mixing driving valve actuating mechanism |
| CN102434520B (en) * | 2011-12-12 | 2015-04-01 | 航天长征化学工程股份有限公司 | Gas-liquid mixing driving valve actuating mechanism |
| CN104500479A (en) * | 2014-12-23 | 2015-04-08 | 江苏远望仪器有限公司 | Automatic-manual linear-travel valve actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |