CN1098178A - Device for opening and closing a valve disc - Google Patents
Device for opening and closing a valve disc Download PDFInfo
- Publication number
- CN1098178A CN1098178A CN 93116884 CN93116884A CN1098178A CN 1098178 A CN1098178 A CN 1098178A CN 93116884 CN93116884 CN 93116884 CN 93116884 A CN93116884 A CN 93116884A CN 1098178 A CN1098178 A CN 1098178A
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- CN
- China
- Prior art keywords
- push rod
- operating stem
- cylinder
- pneumatic cylinder
- hydropneumatic
- 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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- Mechanically-Actuated Valves (AREA)
Abstract
In the hydropneumatic cylinder, there are an operating stem and a piston to be connected as a single entity, moving forward of operating stem rotated the valve rod that is positioned at housing.There are pneumatic cylinder and hydropneumatic cylinder to be oppositely arranged, and a push rod is arranged in pneumatic cylinder.When the pressure of hydropneumatic cylinder interior reduced, push rod promoted operating stem backward.
Description
The present invention relates to a kind of Device for opening and closing a valve disc, the running of opening and close of this valve disc is to rotate by the valve rod in this device to finish.
In the existing Device for opening and closing a valve disc, include hydropneumatic cylinder and spring pressure cylinder, two coaxial settings of cylinder, and be installed in the both sides of driven member (as auxiliary gear) respectively.Operating stem (as tooth bar) that links to each other with piston in two cylinders and auxiliary gear engagement, and this auxiliary gear and valve rod are connected as a single entity.In this device, operating stem under the promotion of hydraulic pressure and spring pressure, is not having the direction of regulation or opposite direction to move respectively, thereby valve rod is rotated along the direction of regulation or opposite direction, realizes opening, closing valve disc.
There is following shortcoming in this existing device:
(a), load on spring has very big-difference when just contacting and under the both of these case of compression back, so output loss is arranged.
(b), by hydropneumatic try hard to recommend reaction force that moving piston must overcome the resistance that makes the valve disc rotation and pressure spring, this just must provide very big steering force.
(c), the spring pressure cylinder is very long because could produce desirable alluviation amount like this, and this makes whole device size and weight increase.
According to the present invention, a kind of Device for opening and closing a valve disc is provided, comprising: an inside includes the casing of valve rod; A hydropneumatic cylinder comprises an operating stem that is connected as a single entity with piston in this hydropneumatic cylinder, can drive valve rod when operating stem travels forward and rotate; A pneumatic cylinder comprises a push rod that depends on gas pressure to move in this pneumatic cylinder, the end face of pneumatic cylinder arranges that towards oil hydraulic cylinder when the pressure in the described oil hydraulic cylinder reduced, said operating stem moved backward under the effect of push rod.
The present invention has following advantage:
(a), the length of pneumatic cylinder reduces greatly, compares with the device that includes the antagonistic spring pressure cylinder in the prior art, whole device size has reduced greatly.
(b), owing to there is not pressure spring, and the length of pneumatic cylinder is very little, so alleviated the weight of whole device.
(c), owing to there not being pressure spring, so do not need special instrument to assemble and dismantle.And the danger that the reaction force that does not also have pressure spring brings.
(d), operating process finishes under constant force, reduces thrust in an end end of stroke and needn't resemble the pressure spring.
Above-mentioned feature of the present invention and other feature are more cheer and bright by the following description meeting of following accompanying drawing that embodiment is done.
Wherein:
Fig. 1 is the longitudinal section front view of first embodiment of the invention;
Fig. 2 is second an embodiment's of the present invention longitudinal section front view;
Shown in Figure 1, there are driven gear that a valve rod 1 and one and valve rod be connected as a single entity or 2, one hydropneumatic cylinders 4 of auxiliary gear and 5, two cylinders of a pneumatic cylinder coaxial and be installed in the both sides of casing 3 respectively in the casing 3.In the end of operating stem 7, the piston 6 of the hydropneumatic cylinder 4 that is connected as a single entity with it and is positioned at is arranged.On operating stem 7, the tooth bar 8 with auxiliary gear 2 engagements is arranged.A pressure fluid is set on the outer end wall 9 of pneumatic linear actuator 4 to be supplied with and exhaust port 10.Outer surface center in the inner end wall 11 of pneumatic cylinder 5 has one towards outer conduit 13, and a little gap is arranged between the outer end wall 12 of its end and pneumatic cylinder 5.
In conduit 13, a piston 16 that diameter is less is arranged, this small bore piston 16 is equipped with O type circle 15, and its exterior edge face 14 is conical.The inner end wall 11 that pneumatic cylinder 5 is passed in the outer end of push rod 17 contacts with the inner of small bore piston 16, and the inner of the inner of push rod 17 and operating stem 7 offsets.Having the air of certain pressure or the gas of liquefaction is sealed in the pneumatic cylinder.And pneumatic cylinder is can not leaking of sealing.Small bore piston 16 also can be made of one with push rod 17.Pressure fluid enters in the fluid pressure cylinder 4 by supply and exhaust port 10.So operating stem is driven and moved forward by piston 6, drive auxiliary gear 2 like this and rotate along the direction of regulation.Meanwhile, the small bore piston 16 that is positioned at pneumatic cylinder 5 overcomes gas pressure and outwards moves.Hydropneumatic pressure cylinder 4 inside, by supplying with and exhaust port 10 decompressions, so small bore piston 16 is mobile reposefully under the gas pressure that acts on its exterior edge face 14, and operating stem 7 outwards moves under the promotion of push rod 17.Thereby auxiliary gear 2 is rotated in the opposite direction.
As shown in Figure 2, conduit 13 and small bore piston 16 among first embodiment have been saved among the 2nd embodiment of the present invention.The substitute is, increased O RunddichtringO 18 around push rod 17.Push rod 17 can slide in the inner end wall 11 of pneumatic cylinder 5, so this part is by the sealing of gas.Remaining part is identical with first embodiment.And represent with identical sequence number.Second embodiment's manner of execution and first embodiment are similar.
Action by operating stem 7 is rotated valve rod, realizes that the structure of this feature is not limited to gear, this a kind of form of tooth bar, as realizing with the bearing pin that is meshed with fork.Said bearing pin stretches out from the side of operating stem, and fork then is connected as a single entity with valve rod.
Embodiments of the invention have below only been described.Those skilled in the art can do any change and improvement in the desired scope of following claims.
Claims (4)
1, a kind of Device for opening and closing a valve disc comprises
A casing, this casing comprises a valve rod;
A hydropneumatic cylinder, this hydropneumatic cylinder comprises an operating stem that is connected as a single entity with piston, operating stem moves forward valve rod is rotated; And;
The pneumatic cylinder that end face is relative with the hydropneumatic cylinder, this pneumatic cylinder comprises a push rod, and the action of this push rod is controlled by air pressure, and when the pressure in the said hydropneumatic cylinder reduced, said operating stem moved under the effect of push rod backward.
2, device as claimed in claim 1 is characterized in that, a tooth bar is arranged on the described operating stem, an auxiliary gear and the engagement of this tooth bar that is connected as a single entity with valve rod, and valve rod rotates along with moving forward of operating stem like this.
3, device as claimed in claim 1 is characterized in that, described pneumatic cylinder comprises a conduit that stretches vertically, and a piston that diameter is less is arranged in the described conduit, is used for promoting backward push rod.
4, device as claimed in claim 1 is characterized in that, described push rod can slide in the inner end wall of pneumatic cylinder, and an O RunddichtringO forms airtight sealing around described push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93116884 CN1098178A (en) | 1993-07-24 | 1993-07-24 | Device for opening and closing a valve disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93116884 CN1098178A (en) | 1993-07-24 | 1993-07-24 | Device for opening and closing a valve disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1098178A true CN1098178A (en) | 1995-02-01 |
Family
ID=4991747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93116884 Pending CN1098178A (en) | 1993-07-24 | 1993-07-24 | Device for opening and closing a valve disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1098178A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764011A (en) * | 2016-11-25 | 2017-05-31 | 中国海洋石油总公司 | Underwater hydraulic controls the executing agency of ball valve |
-
1993
- 1993-07-24 CN CN 93116884 patent/CN1098178A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764011A (en) * | 2016-11-25 | 2017-05-31 | 中国海洋石油总公司 | Underwater hydraulic controls the executing agency of ball valve |
| CN106764011B (en) * | 2016-11-25 | 2019-05-07 | 中国海洋石油集团有限公司 | The executing agency of underwater hydraulic control ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |