CN2222272Y - Hydraulic control one-way valve - Google Patents
Hydraulic control one-way valve Download PDFInfo
- Publication number
- CN2222272Y CN2222272Y CN 94222865 CN94222865U CN2222272Y CN 2222272 Y CN2222272 Y CN 2222272Y CN 94222865 CN94222865 CN 94222865 CN 94222865 U CN94222865 U CN 94222865U CN 2222272 Y CN2222272 Y CN 2222272Y
- Authority
- CN
- China
- Prior art keywords
- valve
- push rod
- hole
- pilot operated
- piston
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a hydraulic control one-way valve, comprising a valve body 2 and a piston 3, a push rod 4, a valve seat 7 and a valve core 10 which are arranged in the valve body. An insulating sleeve is arranged between the piston 3 and the valve seat 7 and is sued for pushing a push rod spring 5 toward the piston 3, and the insulating sleeve 6 is provided with a hole 18 which is used for causing the push rod 3 to pass through and a damping hole which is used for communicating the spaces of the two sides of the insulating sleeve 6. The side wall of the insulating sleeve 6 is also provided with a liquid passing passage 20 which is corresponding to a liquid inlet 15 on the valve body 2. The sealing ring 9 of the one-way valve is arranged on the valve core 10. The hydraulic control one-way valve has large liquid passing area and long service life, and basically eliminates transient pressure impact.
Description
The utility model relates to a kind of Pilot operated check valve, relates in particular to the Pilot operated check valve that coal mine underground hydraulic support frame uses.
A kind of Pilot operated check valve (KDF that is used for hydraulic bracket system is disclosed in the 206th page of " the mining machinery hydraulic transmission " that Coal Industry Press 1984 publishes
1Type).This Pilot operated check valve also comprises valve body, offers through hole in the valve body, and each part of Pilot operated check valve is assemblied in this through hole along axial direction.When this Pilot operated check valve is opened under the effect of hydraulic control power, be that pilot pressure liquid is caused in the piston cavity of piston push rod, piston push rod promotes spool and breaks away from sealing gasket under the effect of hydraulic coupling, thereby finishes the course of action of opening Pilot operated check valve.The Pilot operated check valve of this structure has following defective: at first, piston rod has occupied the part of Pilot operated check valve and has crossed the liquid passage, thereby the liquid level of crossing that has dwindled this valve amasss; Secondly, when unloading with push rod, because pressure and pilot pressure imbalance in the system, so can cause serious instantaneous pressure to impact, this transient pressure impacts and is higher than 190% to 380% of working pressure sometimes.So huge compression shock not only causes strong vibrations, and can cause the fracture of piston rod.
The purpose of this utility model is to provide a kind of Pilot operated check valve that liquid level is long-pending greatly, do not have compression shock of crossing.
The purpose of this utility model is to be achieved by following technological scheme:
A kind of Pilot operated check valve, comprise a valve body that has through hole, perpendicular with through hole and be provided with the liquid outlet opening of alternate layout in the earthing mutually on the valve body with it, inlet opening and hydraulic control hole, piston, push rod, valve seat, spool and push rod spring and valve core spring are fixed in the through hole of valve body coaxially by hollow end cap and mistake liquid cover, between valve seat and push rod spring, be provided with the separation sleeve coaxial with valve seat, this cover is drum shape, the bottom centre of its drum place is provided with the circular hole that an appropriate section that can make push rod is passed through, also be provided with damping hole on other position of this bottom, on the drum sidewall, be provided with the liquid passage excessively that communicates with inlet opening.
The cross section of seal ring is a rectangle, and it is arranged on the spool.
As shown from the above technical solution, the utility model is provided with a separation sleeve between spool and push rod, therefore when the pressure overload of hydraulic prop cavity of resorption, hydraulic coupling can not directly act on push rod on the end face in this chamber.Like this, just do not have instantaneous pressure and act on the push rod, thereby can not form huge compression shock, simultaneously push rod is fractureed.
On the other hand, owing to push rod spring is passed towards the push rod tail end by separation sleeve.So the liquid level of crossing of Pilot operated check valve of the present utility model amasss and can be influenced by this spring.Because, herein cross liquid level long-pending be by on the separation sleeve corresponding opening limited.
In Pilot operated check valve of the present utility model, the seal ring of one-way valve is arranged on the spool, so high pressure liquid can directly not washed away the sealing circle when crossing liquid.So just directly improved the working life of the utility model Pilot operated check valve.
To in conjunction with the accompanying drawings Pilot operated check valve of the present utility model be described with the form of a specific embodiment below, but this description does not constitute any restriction to the utility model.Concrete protection domain of the present utility model is limited by appended claim.
Sectional drawing of unique accompanying drawing 1 expression of the present utility model according to the Pilot operated check valve of principle design of the present utility model.
Can clearly be seen that from Fig. 1 each part in the Pilot operated check valve of the present utility model all is to arrange along the axis of symmetry of its valve body 2.The two ends of valve body 2 are respectively equipped with internal thread, are provided with an end cap 1 in the internal thread in left side among the figure.Piston 3 is contained in the through hole 17 of valve body 2 slidably, and piston 3 among the figure and push rod 4 are to link together by the hole on the piston.But what for a person skilled in the art, these two parts are made one also is conspicuous.And such structure arranged also in the prior art.Be provided with a separation sleeve 6 on the right side of piston 3.The drum shape that is shaped as one one end opening of this separation sleeve 6, its opening end is towards the direction setting that deviates from piston 3.Be provided with the hole 18 that a correspondent section that is used to make push rod 4 is therefrom passed through on the bottom of the drum shape of piston 3, the appropriate section of this hole and push rod 4 matches and merges and can freely slide therein, and seal arrangement is not set between the two.Also be provided with damping hole 19 on the bottom of this drum shape separation sleeve 6, this hole is used to link up the space of separation sleeve 6 two bottom sides.These damping holes 19 can be one, also can be a plurality of.Can these damping holes 19 be set on this bottom at random, only require damping function, but preferably it is arranged on one with the concentric circle of through hole 18 on so that process.
Also be provided with relative with inlet opening 15 a liquid passage 20 of crossing on the drum shape sidewall of separation sleeve 6, this passage also can be a plurality of.This passage 20 can be the circular hole on the sidewall under being distributed in, and also can be the groove of opening on this sidewall.But no matter be that hole or groove can be one or more.When only being provided with one, when assembling, it is aimed at the inlet opening 15 on the valve body 2.
Be provided with a valve seat 7 on the right side of separation sleeve 6, the one-way valve sealing that has constituted the utility model Pilot operated check valve that matches with spool 10 and seal ring 9 thereof of this valve seat is paid.In the utility model, seal ring 9 is arranged on the spool 10.Like this, seal ring 9 is under the protection of protecting jacket 11 of spool 10 outsides.When the highly pressurised liquid in the hydraulic support column cavity of resorption just can directly not wash away seal ring 9 from liquid outlet opening 14 when inlet opening 15 refluxes, thereby improved effectively the working life of seal ring 9.Spool 10 shown in the figure and protecting jacket 11 are two parts, and She Ji purpose is to be convenient to manufacturing like this.It can certainly be designed all-in-one-piece, this structural variation does not influence the realization the purpose of this utility model.
Claims (4)
1. Pilot operated check valve, comprise a valve body (2) that has through hole (17), valve body (2) is gone up perpendicular with through hole (17) and is provided with the liquid outlet opening (14) of alternate layout in the earthing mutually with it, inlet opening (15) and hydraulic control hole (16), piston (3), push rod (4), valve seat (7), spool (10) and push rod spring (5) and valve core spring (12) are fixed in the through hole (17) of valve body (2) coaxially by hollow end cap (1) and mistake liquid cover (13), it is characterized in that, between valve seat (7) and push rod spring (5), be provided with the separation sleeve (6) coaxial with valve seat (7), this cover is drum shape, the bottom centre of its drum place is provided with the circular hole (18) that an appropriate section that can make push rod (4) is passed through, also be provided with damping hole (19) on other position of this bottom, on the drum sidewall, be provided with the liquid passage (20) excessively that communicates with inlet opening (15).
2. Pilot operated check valve as claimed in claim 1 is characterized in that, the cross section of seal ring (9) is a rectangle, and it is arranged on the spool (10).
3. Pilot operated check valve as claimed in claim 1 is characterized in that, the damping hole (19) and the damping hole of separation sleeve (6) bottom are one or more.
4. Pilot operated check valve as claimed in claim 1 is characterized in that, push rod spring (5) places between separation sleeve (6) and the piston (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94222865 CN2222272Y (en) | 1994-10-08 | 1994-10-08 | Hydraulic control one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94222865 CN2222272Y (en) | 1994-10-08 | 1994-10-08 | Hydraulic control one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2222272Y true CN2222272Y (en) | 1996-03-13 |
Family
ID=33836748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94222865 Expired - Fee Related CN2222272Y (en) | 1994-10-08 | 1994-10-08 | Hydraulic control one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2222272Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102689A (en) * | 2011-01-30 | 2011-06-22 | 林友根 | Hydraulic one-way valve |
| CN103410537A (en) * | 2013-08-20 | 2013-11-27 | 深圳市神拓机电设备有限公司 | Safety valve |
| CN103470564A (en) * | 2013-09-22 | 2013-12-25 | 太仓康茂电子有限公司 | Pilot-operated check valve |
| CN103807244A (en) * | 2014-01-22 | 2014-05-21 | 马鞍山市裕华机械制造有限公司 | Plug-in mounting type oil supplementing valve controlled by ejector rod |
| CN103836016A (en) * | 2012-11-23 | 2014-06-04 | 上海立新液压有限公司 | Electric hydraulic control check valve |
-
1994
- 1994-10-08 CN CN 94222865 patent/CN2222272Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102689A (en) * | 2011-01-30 | 2011-06-22 | 林友根 | Hydraulic one-way valve |
| CN102102689B (en) * | 2011-01-30 | 2013-04-10 | 林友根 | Hydraulic one-way valve |
| CN103836016A (en) * | 2012-11-23 | 2014-06-04 | 上海立新液压有限公司 | Electric hydraulic control check valve |
| CN103410537A (en) * | 2013-08-20 | 2013-11-27 | 深圳市神拓机电设备有限公司 | Safety valve |
| CN103470564A (en) * | 2013-09-22 | 2013-12-25 | 太仓康茂电子有限公司 | Pilot-operated check valve |
| CN103807244A (en) * | 2014-01-22 | 2014-05-21 | 马鞍山市裕华机械制造有限公司 | Plug-in mounting type oil supplementing valve controlled by ejector rod |
| CN103807244B (en) * | 2014-01-22 | 2015-10-28 | 马鞍山市裕华机械制造有限公司 | Push rod controls plug-in type Fill 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 |