CN103498825B - Zero leakage plug-in type pilot controlled check valve - Google Patents
Zero leakage plug-in type pilot controlled check valve Download PDFInfo
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- CN103498825B CN103498825B CN201310476457.5A CN201310476457A CN103498825B CN 103498825 B CN103498825 B CN 103498825B CN 201310476457 A CN201310476457 A CN 201310476457A CN 103498825 B CN103498825 B CN 103498825B
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- spool
- seal ring
- valve body
- spring seat
- dovetail groove
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- 238000005336 cracking Methods 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 208000004141 microcephaly Diseases 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Check Valves (AREA)
Abstract
The invention provides a kind of zero leakage plug-in type pilot controlled check valve, comprise valve body, spool, spool pressing plate, controlling rod, spring, spring seat, circlip, seal ring and back-up ring, described controlling rod is installed in the control chamber of valve body, and is fixed by circlip; Described spool is installed in valve body; Described spring seat is connected with valve body, and described spring is fixed between spool and spring seat; Described spool is provided with dovetail groove, is provided with seal ring in described dovetail groove; Described seal ring is provided with spool pressing plate, and described spool pressing plate is fixedly connected with spool.The present invention adopts dovetail groove type sealing configuration, and is fixed by a spool pressing plate, prevents seal ring to be washed away by fluid, and can adjust the cracking pressure of fluid-control one-way by spring seat while playing seal action.
Description
Technical field
The present invention relates to Pilot operated check valve technical field, specifically a kind of zero leakage plug-in type pilot controlled check valve.
Background technique
Pilot operated check valve is the fluid control apparatus in hydraulic system, is arranged between high-pressure oil passage and low pressure oil way.When the obstructed high pressure oil of control chamber, oil suction chamber and oil back chamber completely cut off, and when control chamber leads to high pressure oil, oil suction chamber and oil back chamber UNICOM, can control the forward and reverse of liquid stream like this can pass through.
Confirm according to open source information, general Pilot operated check valve adopts the metal conical surface firmly to seal.The Pilot operated check valve technology capability of this design is better, is applicable to producing in enormous quantities, and leakage rate is relatively large, and along with the growth of opening times back and forth, sealability worse and worse.
Require strict to leakage rate at some missile armament, carrier rockets etc., the hydraulic system that reliability requirement is very high, above-mentioned Pilot operated check valve uses and is restricted.The present invention requires based on this application just and produces.
Summary of the invention
The present invention is directed to above shortcomings in prior art, provide a kind of zero leakage plug-in type pilot controlled check valve.
The present invention is achieved by the following technical solutions.
A kind of zero leakage plug-in type pilot controlled check valve, comprise valve body, spool, spool pressing plate, controlling rod, spring, spring seat, circlip, seal ring and back-up ring, described controlling rod is installed in the control chamber of valve body, and is fixed by circlip; Described spool is installed in valve body; Described spring seat is connected with valve body, and described spring is fixed between spool and spring seat; Described spool is provided with dovetail groove, is provided with seal ring in described dovetail groove; Described seal ring is provided with spool pressing plate, and described spool pressing plate is fixedly connected with spool.
Preferably, Spielpassung is between described spool and valve body and between spring seat and spool.
Preferably, described valve body is provided with step hole, and described step hole play the guiding role to spool.
Preferably, between described spring seat and spool, form leading role, and change the pretightening force of spring by rotation spring seat, thus change the cracking pressure of zero leakage Pilot operated check valve.
Preferably, be threaded connection between described spring seat and valve body and/or between spool pressing plate and spool.
Zero leakage plug-in type pilot controlled check valve provided by the invention, its working principle is:
Controlling rod is installed in control chamber, and fixes with circlip, and control chamber and oil back chamber are isolated by the seal ring IV on controlling rod together with the seal ring I on valve body microcephaly; Spool is installed in valve body, spool is provided with the dovetail groove for installing dovetail groove seal ring, and by spool pressing plate, dovetail groove seal ring is fixed on spool, this dovetail groove seal ring has isolated oil suction chamber and oil back chamber together with the seal ring II on valve body major part, and spool pressing plate is threaded with adopting between spool; Valve rear end is equipped with spring seat, and for the pretightening force of Regulation spring, the cracking pressure of adjustment Pilot operated check valve, the seal ring III on spring seat completely cuts off fluid and air.During work, when the pressure controlling mouth Pk reaches setting value, spool is opened, and flow liquid can flow to B mouth from A mouth, and when the pressure of Pk drops to below setting value, spool is closed, and flow liquid cannot flow to B mouth from A mouth.Zero leakage plug-in type pilot controlled check valve structure outline is:
Dovetail groove seal ring is installed in the dovetail groove of spool, and has a spool pressing plate to be pressed on seal ring, and be firmly pressed in spool by dovetail groove seal ring, spool pressing plate is threaded connection on spool.Spool is arranged in valve body, and is Spielpassung between valve body and spring seat, and can play the effect of guiding, prevents the play of spool in valve body.
The present invention adopts dovetail to wipe seal ring sealing, and its advantage and beneficial effect are:
1) favorable sealing property, can reach the requirement of zero leakage;
2) spool and be Spielpassung between valve body and spring seat, has leading role;
3) zero leakage plug-in type pilot controlled check valve is a kind of cartridge valve, has that size is little, lightweight, compact structure, a feature such as easy to operate, easy to assemble, is suitable for spatial structure compact systems uses.
The present invention adopts dovetail groove type sealing configuration, and is fixed by a spool pressing plate, prevents seal ring to be washed away by fluid, and can adjust the cracking pressure of fluid-control one-way by spring seat while playing seal action.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is dovetail groove sealing mechanism structural representation of the present invention;
In figure: 1 be valve body, 2 be seal ring I, 3 be back-up ring, 4 be controlling rod, 5 be seal ring II, 6 be dovetail groove seal ring, 7 be spool, 8 be spring, 9 be seal ring III, 10 be spring seat, 11 be spool pressing plate, 12 be spring washer, 13 be screw, 14 be seal ring IV, 15 for circlip, A is oil suction chamber, B is oil back chamber, and 16 is control chamber.
Embodiment
Below embodiments of the invention are elaborated: the present embodiment is implemented under premised on technical solution of the present invention, give detailed mode of execution and concrete operating process.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
As shown in Figure 1, present embodiments provide a kind of zero leakage plug-in type pilot controlled check valve, comprise valve body 1, spool 7, spool pressing plate 11, controlling rod 4, spring 8, spring seat 10, circlip 15, dovetail groove seal ring 6 and back-up ring 3, described controlling rod 4 is installed in the control chamber of valve body 1, and is fixed by circlip 15; Described spool 7 is installed in valve body 1; Described spring seat 10 is connected with valve body 1, and described spring 8 is fixed between spool 7 and spring seat 10; Described spool 7 is provided with dovetail groove, is provided with dovetail groove seal ring 6 in described dovetail groove, and described dovetail groove and dovetail groove seal ring 6 form dovetail groove sealing mechanism; Described dovetail groove seal ring 6 is provided with spool pressing plate 11, and described spool pressing plate 11 is fixedly connected with spool 7, as shown in Figure 2.
Further, Spielpassung is between described spool 7 and valve body 1 and between spring seat 10 and spool 7.
Further, described valve body 1 is provided with step hole, and described step hole play the guiding role to spool 7.
Further, form leading role between described spring seat 10 and spool 7, and change the pretightening force of spring 8 by rotation spring seat 10, thus change the cracking pressure of zero leakage Pilot operated check valve.
Further, be threaded connection between described spring seat and valve body and/or between spool pressing plate and spool.
Be specially:
In the present embodiment, controlling rod 4 is installed in the control chamber of valve body 1, and on valve body 1 control chamber, opened several oil-through hole communication oil back chamber, and controlling rod 4 is fixed in valve body 1 by circlip 15.Spool 7 is installed in valve body 1, and under the effect of spring 8, withstanding on the step hole of valve body 1 when off working state, is Spielpassung between spool 7 and valve body 1, and the step hole of valve body 1 play the guiding role to spool 7.Spool 7 has driven a dovetail groove above, and can install dovetail groove seal ring 6, and have a spool pressing plate 11 to be pressed on dovetail groove seal ring 6, spool pressing plate 11 is fixed on spool 7 by screw 13.Spring seat 10 is threaded connection on valve body 1, spring is fixed between spool 7 and spring seat 10, it is also Spielpassung between spring seat 10 and spool 7, also certain leading role is played, and the pretightening force of spring 8 can be changed by rotation spring seat 10, change the cracking pressure of whole zero leakage Pilot operated check valve.
The working procedure of the present embodiment is:
When control chamber oil liquid pressure is below certain setting value, spool 7, under the effect of spring 8, withstand on the step hole of valve body 1, and dovetail groove seal ring 6 withstands on the step hole of valve body 1 by spool pressing plate 11 with spool 7, and playing the effect of sealing, fluid cannot get back to oil back chamber from oil suction chamber; When control chamber oil liquid pressure reaches setting value, fluid push lever 1, and the pretightening force that spool 7 overcomes spring 8 under the active force of controlling rod 1 leaves the step hole face of valve body 1, fluid can get back to oil back chamber from oil suction chamber.
The present embodiment adopts dovetail groove sealing configuration, and is fixed by a spool pressing plate, prevents seal ring to be washed away by fluid, and can adjust the cracking pressure of fluid-control one-way by spring seat while playing seal action.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (5)
1. a zero leakage plug-in type pilot controlled check valve, it is characterized in that, comprise valve body, spool, spool pressing plate, controlling rod, spring, spring seat, circlip, dovetail groove seal ring and back-up ring, described controlling rod is installed in the control chamber of valve body, and is fixed by circlip; Described spool is installed in valve body; Described spring seat is connected with valve body, and described spring is fixed between spool and spring seat; Described spool is provided with dovetail groove, is provided with dovetail groove seal ring in described dovetail groove; Described dovetail groove seal ring is provided with spool pressing plate, and described spool pressing plate is fixedly connected with spool;
Controlling rod is provided with seal ring IV, and the microcephaly of valve body is provided with seal ring I, and the major part of valve body is provided with seal ring II, and spring seat is provided with seal ring III; Wherein, control chamber and oil back chamber are isolated by seal ring IV together with seal ring I; Dovetail groove seal ring has isolated oil suction chamber and oil back chamber together with seal ring II, and spring seat is used for the pretightening force of Regulation spring, thus the cracking pressure of adjustment Pilot operated check valve, seal ring III completely cuts off fluid and air.
2. zero leakage plug-in type pilot controlled check valve according to claim 1, is characterized in that, is Spielpassung between described spool and valve body and between spring seat and spool.
3. zero leakage plug-in type pilot controlled check valve according to claim 2, is characterized in that, described valve body is provided with step hole, and described step hole play the guiding role to spool.
4. zero leakage plug-in type pilot controlled check valve according to claim 2, is characterized in that, forms leading role between described spring seat and spool, and changes the pretightening force of spring by rotation spring seat, thus changes the cracking pressure of zero leakage Pilot operated check valve.
5. zero leakage plug-in type pilot controlled check valve according to claim 1, is characterized in that, is threaded connection between described spring seat and valve body and/or between spool pressing plate and spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310476457.5A CN103498825B (en) | 2013-10-12 | 2013-10-12 | Zero leakage plug-in type pilot controlled check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310476457.5A CN103498825B (en) | 2013-10-12 | 2013-10-12 | Zero leakage plug-in type pilot controlled check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103498825A CN103498825A (en) | 2014-01-08 |
| CN103498825B true CN103498825B (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310476457.5A Active CN103498825B (en) | 2013-10-12 | 2013-10-12 | Zero leakage plug-in type pilot controlled check valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673601B (en) * | 2014-11-21 | 2017-11-07 | 上海新跃仪表厂 | A kind of Zero-leakage hydraulic zero-bit lock |
| CN112762207A (en) * | 2021-01-12 | 2021-05-07 | 上海航天控制技术研究所 | Hydraulic control one-way valve with safety function |
| CN113586546A (en) * | 2021-08-19 | 2021-11-02 | 攀钢集团攀枝花钢钒有限公司 | Adjustable hydraulic control one-way valve |
| CN113883129A (en) * | 2021-10-21 | 2022-01-04 | 贵州航天控制技术有限公司 | Plug-in hydraulic lock |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87202793U (en) * | 1987-03-09 | 1988-11-02 | 李继周 | Liquid-control one-way valve |
| US5782269A (en) * | 1997-04-14 | 1998-07-21 | Caterpillar Inc. | Soft seal poppet type check valve |
| EP0933570A1 (en) * | 1998-02-02 | 1999-08-04 | Westinghouse Air Brake Company | Low profile discharge check valve |
| CN2604524Y (en) * | 2003-03-13 | 2004-02-25 | 北京威力清矿山控制技术有限公司 | Inserting hydraulic control one-way valve |
| CN200985801Y (en) * | 2006-12-22 | 2007-12-05 | 郑州恒达液压工程中心 | Plug-in mounting type pilot operated check valve |
| CN201731118U (en) * | 2010-07-05 | 2011-02-02 | 淮南市国力液压机械制造有限公司 | Plug-in mounting type hydraulic-control one-way valve |
-
2013
- 2013-10-12 CN CN201310476457.5A patent/CN103498825B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87202793U (en) * | 1987-03-09 | 1988-11-02 | 李继周 | Liquid-control one-way valve |
| US5782269A (en) * | 1997-04-14 | 1998-07-21 | Caterpillar Inc. | Soft seal poppet type check valve |
| EP0933570A1 (en) * | 1998-02-02 | 1999-08-04 | Westinghouse Air Brake Company | Low profile discharge check valve |
| CN2604524Y (en) * | 2003-03-13 | 2004-02-25 | 北京威力清矿山控制技术有限公司 | Inserting hydraulic control one-way valve |
| CN200985801Y (en) * | 2006-12-22 | 2007-12-05 | 郑州恒达液压工程中心 | Plug-in mounting type pilot operated check valve |
| CN201731118U (en) * | 2010-07-05 | 2011-02-02 | 淮南市国力液压机械制造有限公司 | Plug-in mounting type hydraulic-control one-way valve |
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| Publication number | Publication date |
|---|---|
| CN103498825A (en) | 2014-01-08 |
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