CN101144554A - Hydraulic control device of butterfly valve - Google Patents
Hydraulic control device of butterfly valve Download PDFInfo
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- CN101144554A CN101144554A CNA2007101343935A CN200710134393A CN101144554A CN 101144554 A CN101144554 A CN 101144554A CN A2007101343935 A CNA2007101343935 A CN A2007101343935A CN 200710134393 A CN200710134393 A CN 200710134393A CN 101144554 A CN101144554 A CN 101144554A
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Abstract
The invention discloses a hydraulic control device of a butterfly valve, and the hydraulic control device comprises a case body, two main oil cylinders which are connected and equipped on the both sides of the case body and coaxially arranged. A main piston is glidingly arranged in each main oil cylinder, main piston controlling oil openings are arranged at the both ends of each main oil cylinder, a valve rod turning part and a piston rod matched with the valve rod turning part in linkage way are arranged in the case body, and the both ends of the piston rod are respectively firmly equipped on the two main pistons. The invention is characterized in that one side of one main oil cylinder is coaxially connected with a subsidiary oil cylinder, a subsidiary piston is glidingly arranged in the subsidiary oil cylinder, subsidiary piston controlling oil openings are arranged at the both ends of the subsidiary oil cylinder, a subsidiary piston rod is arranged on the subsidiary piston at the side closing to the main piston, and when the length of the subsidiary piston rod satisfies the condition that the main piston is positioned at the turning-on position, the subsidiary piston rod stretches into the main oil cylinder and supports the end part of the main piston rod. A supporting roller is arranged in the case body to balance out the radial component force of a shifting fork to the piston rod, and the wearing to the oil cylinder seat rubber sealing ring is reduced, and the motion stability of the piston rod and the service life of the product are improved. The utility model has the advantages that the subsidiary oil cylinder gives an additional thrust force to the piston in the main oil cylinder through the subsidiary oil cylinder connected at the outer part of the main oil cylinder in series when the butterfly valve is turned on.
Description
Technical field
The present invention relates to a kind of hydraulic control device, specifically be meant the hydraulic control device of the control valve plate keying that is applied in the butterfly valve.
Background technique
Butterfly valve is to use the circular butterfly plate that rotates with valve rod to make open-shut device, to realize the valve of switching motion, has characteristics such as fluid control characteristic simple in structure, that volume is little, in light weight, simple to operate, good.Butterfly valve uses mainly as block valve, also can be designed to have regulate or block the function of holding concurrently and regulating.Butterfly valve is used widely on general industries such as oil, coal gas, chemical industry, water treatment.
Current butterfly valve by control mode can be divided into manually, gear transmission, pneumatic, surge and electronic several.Wherein hydraulic transmission control has advantages such as volume is little, in light weight, output power big, manipulation is easy to adjust, the response time is short, layout is flexible, obtains extensive use in butterfly valve control.
The butterfly valve of the hydraulic control of Chu Shouing in the market, its hydraulic control device is in the both sides of casing oil cylinder to be set, be provided with piston in the oil cylinder, piston drives valve rod by driving mechanisms such as shift fork, connecting rod, tooth bars and rotates, the piston two ends are provided with oil inlet and outlet respectively, drive the rotation of valve rod by piston motion, and realize the motion of valve plate, finish switching motion.Because unlatching moment of valve plate is to overcome the stiction acting, and after the valve plate promotion, then overcome the kinetic force of friction acting, because the coefficient of kinetic friction is much smaller than static friction coefficient, therefore it is less to promote the requirement of valve plate post exercise moment, requires very big and open the moment of moment.
Summary of the invention
The present invention for the shortcoming that overcomes prior art with not enough, and provide a kind of hydraulic control device of butterfly valve, realize effectively that not only butterfly valve plate opens and reduce production costs, resource is fully used.
For achieving the above object, technological scheme of the present invention is: comprise casing, be connected and installed in two master cylinders of casing both sides and coaxial setting, each is provided with main piston slidably in each master cylinder, and each master cylinder two ends is provided with main piston control port, the piston rod that is provided with the valve rod turning piece in the casing and is linked with the valve rod turning piece, the piston rod two ends are fixedly mounted on respectively on two main pistons, it is characterized in that: the also coaxial auxiliary oil cylinder that is serially connected with of a side of at least one master cylinder, be provided with sub-piston in this auxiliary oil cylinder slidably, the two ends of auxiliary oil cylinder are provided with sub-piston control port, sub-piston is fixed with the sub-piston bar near a side of main piston, this sub-piston pole length satisfies when main piston is in the enable possition, stretches into master cylinder and withstands on the main piston rod end.
Further be provided be master cylinder with auxiliary oil cylinder between be connected in series by connecting sleeve.Piston rod is provided with the straight pin of band roller, and described valve rod rotating component is the shift fork adaptive with straight pin, and this shift fork head is provided with borehole jack.Also be provided with the support roller that mates with piston rod in the casing, this support roller middle part is provided with annular groove, and this annular groove contacts setting with the piston rod cooperation.
The invention has the advantages that: by auxiliary oil cylinder of serial connection outside master cylinder, in the moment that butterfly valve is opened, the sub-piston bar is given the extra thrust of piston rod in the master cylinder, increased the unlatching moment of torsion of butterfly valve, reduce the operating cylinder diameter, provide cost savings, improved the utilization ratio of resource.
The invention will be described further below in conjunction with Figure of description.
Figure of description
Fig. 1 specific embodiment of the invention structural representation
Embodiment
Be illustrated in figure 1 as the embodiment of the hydraulic control device of butterfly valve of the present invention, comprise casing 1, this casing 1 left and right sides opening, its opening is provided with oil cylinder seat 11,12, on this oil cylinder seat 11,12, be separately installed with oil cylinder 2 and oil cylinder 5, be provided with piston 21,51 slidably in this oil cylinder 2,5, the piston rod 22 that is fixed with on this piston 21,51.Piston rod 22 two ends are locked on piston 21,51 by piston unt 23,26, these piston rod 22 middle parts are all passed oil cylinder seat 11,12 with sealing means and are entered casing 1, be provided with valve rod shift fork 13 in the described casing 1, valve rod in this shift fork 13 and the butterfly valve is linked, to reach the purpose that control valve opens and closes.Piston rod 22 is provided with straight pin 14, and upper roller 18 is respectively overlapped at the two ends of this straight pin, and the afterbody of shift fork and roller 18 are linked, and shift fork 13 heads are provided with borehole jack 15, and the valve stem casing of butterfly valve is connected to borehole jack 15, and fixing with parallel key 16, and formation is linked.Certainly the present invention can also adopt other common interlock settings, is provided with or the like such as the crank block interlock.Also be provided with in the described casing 1 with respect to shift fork 13 both sides and with the support roller 17 of piston rod 22 coupling, described support roller 17 has annular groove in the middle, this annular groove contacts with the cylindrical cooperation of piston rod 22, not only piston rod 22 is supported, offset the radial component that shift fork transmits, that has avoided also that piston rod 22 occurs in transmission process rocks, and has reduced the wearing and tearing of rubber seal in the oil cylinder seat 11,12, the working life of having improved piston rod movement stability and product.Also be respectively arranged with piston control port 24,25,53,54 in relative piston 21,51 both sides, described oil cylinder 2,5 two ends, the oil-feed and fuel-displaced respectively of these hydraulic fluid ports can realize that piston 21,51 slides in oil cylinder 2,5.The FERRULETYPE free flow coupling is all adopted in described piston control port.With respect to the other end of oil cylinder seat 11 connecting sleeve 3 is installed at described oil cylinder 2, these connecting sleeve 3 outsides are connected with auxiliary oil cylinder 4, have been mounted slidably sub-piston 41 in this auxiliary oil cylinder 4.Auxiliary oil cylinder 4 outer ends are cylinder cover 42, and the both sides of the relative sub-piston 41 in described auxiliary oil cylinder 4 two also are respectively arranged with sub-piston control port 43 and 44, and control port 44 can be advanced pressure oil, promote sub-piston and slide, and 43 of control ports play the oil extraction effect.Described sub-piston 41 is fixed with sub-piston bar 45, and this sub-piston bar 45 passes connecting sleeve 3 with sealing means and enters master cylinder 2, and this sub-piston pole length satisfies when main piston is in the enable possition, stretches into master cylinder and withstands on the main piston rod end.For the better cost of saving auxiliary oil cylinder 4, the length very short that auxiliary oil cylinder 4 length can be controlled with respect to oil cylinder 2
In order to introduce design concept of the present invention better, working procedure of the present invention is as follows, when wanting the opened butterfly valve valve plate, open piston control port 25,54 simultaneously and open sub-piston control port 44, pressure oil enters oil cylinder 2, oil cylinder 5 and auxiliary oil cylinder 4 respectively, the power that directly acts on piston 21,51 this moment has only the pressure oil in the oil cylinder 2,5 to provide, under this pressure condition, can't promote piston and slide, very big because the piston 21,51 of this moment is subjected to the static friction force and the medium active force of valve plate.And enter the pressure oil of auxiliary oil cylinder 4 because auxiliary oil cylinder 4 inner carriers do not have resistance, thereby promoting sub-piston 41 moves towards oil cylinder 2 directions, because auxiliary oil cylinder 4 length are very short, therefore sub-piston bar 45 heads that are connected in sub-piston 41 enter oil cylinder 2 inside by connecting sleeve 3 very rapidly, and be connected on the piston rod 22, this moment, piston was except that being subjected to self in-oil cylinder oil pressure, also be subjected to the thrust of sub-piston bar 45, overcome the large drag forces of valve plate startup moment this moment, promoting piston rod 22 slides, after piston 21 motions are got up, sub-piston bar 45 stop motion because sub-piston 41 has moved to by the range of oil cylinder 2 directions, this moment, sub-piston bar 45 separated with piston rod 22.Because this moment, resistance was mainly kinetic force of friction, and since the coefficient of kinetic friction much smaller than static friction coefficient,, just can promote butterfly valve fully by oil cylinder 2 and 5 oil pressure this moment and continue to open so this moment, resistance greatly reduced.Like this then when making the hydraulic control device of this butterfly valve, cylinder diameter is just programmable smaller, has saved the steel materials, and how many costs auxiliary oil cylinder does not need because its stroke is very short.Therefore integral body provides cost savings, and has improved efficiency of resource.
Claims (4)
1. the hydraulic control device of a butterfly valve, comprise casing, be connected and installed in two master cylinders of casing both sides and coaxial setting, each is provided with main piston slidably in each master cylinder, and each master cylinder two ends is provided with main piston control port, the piston rod that is provided with the valve rod turning piece in the casing and is linked with the valve rod turning piece, the piston rod two ends are fixedly mounted on respectively on two main pistons, it is characterized in that: the also coaxial auxiliary oil cylinder that is serially connected with of a side of a master cylinder, be provided with sub-piston in this auxiliary oil cylinder slidably, the two ends of auxiliary oil cylinder are provided with sub-piston control port, sub-piston is fixed with the sub-piston bar near a side of main piston, this sub-piston pole length satisfies when main piston is in the enable possition, stretches into master cylinder and withstands on the main piston rod end.
2. the hydraulic control device of butterfly valve according to claim 1 is characterized in that: be connected in series by connecting sleeve between master cylinder and the auxiliary oil cylinder.
3. the hydraulic control device of butterfly valve according to claim 1 and 2 is characterized in that: piston rod is provided with the straight pin of band roller, and the valve rod rotating component is the shift fork adaptive with straight pin, and this shift fork head is provided with borehole jack.
4. the hydraulic control device of butterfly valve according to claim 3 is characterized in that: also be provided with the support roller with the piston rod coupling in the casing, this support roller middle part is provided with annular groove, and this annular groove contacts setting with the piston rod cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101343935A CN101144554A (en) | 2007-10-12 | 2007-10-12 | Hydraulic control device of butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101343935A CN101144554A (en) | 2007-10-12 | 2007-10-12 | Hydraulic control device of butterfly valve |
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| Publication Number | Publication Date |
|---|---|
| CN101144554A true CN101144554A (en) | 2008-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101343935A Pending CN101144554A (en) | 2007-10-12 | 2007-10-12 | Hydraulic control device of butterfly valve |
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| CN (1) | CN101144554A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174869A (en) * | 2013-03-25 | 2013-06-26 | 上海凌源设备工程有限公司 | Valve driver |
| CN103603992A (en) * | 2013-12-04 | 2014-02-26 | 天津富赛克流体控制设备有限公司 | Lead screw nut type driving mechanism of valve |
| WO2014040475A1 (en) * | 2012-09-17 | 2014-03-20 | 成都迈可森流体控制设备有限公司 | Double-guidance shift fork transmission box |
| CN104389670A (en) * | 2014-11-16 | 2015-03-04 | 重庆市明皓光学仪器有限公司 | Regulating device of heat dissipater |
| CN110553071A (en) * | 2019-09-04 | 2019-12-10 | 刘进取 | Gas pressure reducing valve |
-
2007
- 2007-10-12 CN CNA2007101343935A patent/CN101144554A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040475A1 (en) * | 2012-09-17 | 2014-03-20 | 成都迈可森流体控制设备有限公司 | Double-guidance shift fork transmission box |
| CN103174869A (en) * | 2013-03-25 | 2013-06-26 | 上海凌源设备工程有限公司 | Valve driver |
| CN103603992A (en) * | 2013-12-04 | 2014-02-26 | 天津富赛克流体控制设备有限公司 | Lead screw nut type driving mechanism of valve |
| CN104389670A (en) * | 2014-11-16 | 2015-03-04 | 重庆市明皓光学仪器有限公司 | Regulating device of heat dissipater |
| CN110553071A (en) * | 2019-09-04 | 2019-12-10 | 刘进取 | Gas pressure reducing valve |
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