CN103498825A - Zero leakage inserting installation hydraulic control one-way valve - Google Patents
Zero leakage inserting installation hydraulic control one-way valve Download PDFInfo
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- CN103498825A CN103498825A CN201310476457.5A CN201310476457A CN103498825A CN 103498825 A CN103498825 A CN 103498825A CN 201310476457 A CN201310476457 A CN 201310476457A CN 103498825 A CN103498825 A CN 103498825A
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- spool
- valve body
- spring seat
- pressing plate
- zero leakage
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Abstract
The invention provides a zero leakage inserting installation hydraulic control one-way valve which comprises a valve body, a valve element, a valve element pressing plate, a control rod, a spring, a spring seat, an elastic stopping ring, a sealing ring and a stopping ring. The control rod is installed in a control cavity of the valve body and fixed through the elastic stopping ring, the valve element is installed in the valve body, the spring seat is connected with the valve body, and the spring is fixed between the valve element and the spring seat. A dovetail groove is formed in the valve element, the sealing ring is installed in the dovetail groove, the valve element pressing plate is arranged on the sealing ring, and the valve element pressing plate is fixedly connected with the valve element. According to the zero leakage inserting installation hydraulic control one-way valve, a dovetail-groove-type sealing structure is adopted and fixed through the valve element pressing plate, the sealing ring is further prevented from being washed away by oil liquid while the sealing effect is achieved, and the opening pressure of the hydraulic control one-way valve can be adjusted through the spring seat.
Description
Technical field
The present invention relates to the 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 liquid flow control device 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 are isolated, and when the logical high pressure oil of control chamber, oil suction chamber and oil back chamber UNICOM, can control forward and reverse can the passing through that liquid flows like this.
According to open source information, confirm, 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.
Strict to leakage rate at some missile armaments, carrier rocket etc., the hydraulic system that reliability requirement is very high, above-mentioned Pilot operated check valve is used and is restricted.The present invention just is being based on this application requirements and is producing.
Summary of the invention
The present invention is directed to above shortcomings in prior art, a kind of zero leakage plug-in type pilot controlled check valve is provided.
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, and described controlling rod is installed in the control chamber of valve body, and fixes 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, in described dovetail groove, seal ring is installed; Described seal ring is provided with the spool pressing plate, and described spool pressing plate is fixedly connected with spool.
Preferably, be Spielpassung 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 the rotation spring seat, thereby change the cracking pressure of zero leakage Pilot operated check valve.
Preferably, between described spring seat and valve body and/or between spool pressing plate and spool, be threaded connection.
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 the seal ring IV on controlling rod isolates control chamber and oil back chamber together with the seal ring I on the valve body microcephaly; Spool is installed in valve body, spool is provided with for the dovetail groove of dovetail groove seal ring is installed, and by the spool pressing plate, the dovetail groove seal ring is fixed on spool, this dovetail groove seal ring has been isolated oil suction chamber and oil back chamber with together with seal ring II on the valve body major part, between spool pressing plate and spool, adopts and is threaded; Valve rear end is equipped with spring seat, for the pretightening force of Regulation spring, adjusts the cracking pressure of Pilot operated check valve, the isolated fluid of the seal ring III on spring seat and atmosphere.During work, when the pressure of controlling mouthful Pk reaches setting value, spool is opened, and flow liquid can flow to the B mouth from the A mouth, and when the pressure of Pk drops to setting value when following, spool is closed, and flow liquid can't flow to the B mouth from the A mouth.Zero leakage plug-in type pilot controlled check valve structure outline is:
The 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 the dovetail groove seal ring firmly is pressed in spool, and the 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 the seal ring sealing, and its advantage and beneficial effect are:
1) favorable sealing property, can reach the requirement of zero leakage;
2) be Spielpassung between spool and valve body and spring seat, there is leading role;
3) the zero leakage plug-in type pilot controlled check valve is a kind of cartridge valve, has that size is little, lightweight, a compact structure, the characteristics such as easy to operate, easy to assemble, is suitable for using on the spatial structure compact systems.
The present invention adopts the dovetail groove type sealing configuration, and fixes by a spool pressing plate, has also prevented that when playing seal action seal ring from being washed away by fluid, and can adjust the cracking pressure of fluid-control one-way by spring seat.
The accompanying drawing explanation
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
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 is that valve body, 2 is that seal ring I, 3 is that back-up ring, 4 is that controlling rod, 5 is that seal ring II, 6 is that dovetail groove seal ring, 7 is that spool, 8 is that spring, 9 is that seal ring III, 10 is that spring seat, 11 is that spool pressing plate, 12 is that spring washer, 13 is that screw, 14 is that seal ring IV, 15 is 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 take technical solution of the present invention under prerequisite, has provided 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, the present embodiment provides 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 fixing 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, and dovetail groove seal ring 6 is installed in described dovetail groove, and described dovetail groove and dovetail groove seal ring 6 form the 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, be Spielpassung 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, between described spring seat 10 and spool 7, form leading role, and change the pretightening force of spring 8 by rotation spring seat 10, thereby change the cracking pressure of zero leakage Pilot operated check valve.
Further, between described spring seat and valve body and/or between spool pressing plate and spool, be threaded connection.
Be specially:
In the present embodiment, controlling rod 4 is installed in the control chamber of valve body 1, and has opened several oil-through holes and link up oil back chamber on valve body 1 control chamber, and controlling rod 4 is fixed in valve body 1 by circlip 15.Spool 7 is installed in valve body 1, under the effect of spring 8, when off working state, withstands on the step hole of valve body 1, and between spool 7 and valve body 1, be Spielpassung, the step hole of valve body 1 play the guiding role to spool 7.Driven a dovetail groove above spool 7, dovetail groove seal ring 6 can be installed, and had 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 between spring seat 10 and spool 7, is also Spielpassung, also play certain leading role, and can change the pretightening force of spring 8 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 the control chamber oil liquid pressure when certain setting value is following, 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 can't be got back to oil back chamber from oil suction chamber; When the control chamber oil liquid pressure reaches setting value, fluid push lever 1, and spool 7 overcomes the step hole face that the pretightening force of spring 8 is left valve body 1 under the active force of controlling rod 1, fluid can be got back to oil back chamber from oil suction chamber.
The present embodiment adopts the dovetail groove sealing configuration, and fixes by a spool pressing plate, has also prevented that when playing seal action seal ring from being washed away by fluid, and can adjust the cracking pressure of fluid-control one-way by spring seat.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification 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, seal ring and back-up ring, described controlling rod is installed in the control chamber of valve body, and fixes 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, in described dovetail groove, seal ring is installed; Described seal ring is provided with the spool pressing plate, and described spool pressing plate is fixedly connected with spool.
2. zero leakage plug-in type pilot controlled check valve according to claim 1, is characterized in that, between described spool and valve body and between spring seat and spool, is Spielpassung.
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, between described spring seat and spool, forms leading role, and change the pretightening force of spring by the rotation spring seat, thereby change 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, between described spring seat and valve body and/or between spool pressing plate and spool, is threaded connection.
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 true CN103498825A (en) | 2014-01-08 |
| CN103498825B 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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| Country | Link |
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| CN (1) | CN103498825B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673601A (en) * | 2014-11-21 | 2016-06-15 | 上海新跃仪表厂 | Zero-leakage hydraulic zero position 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 |
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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673601A (en) * | 2014-11-21 | 2016-06-15 | 上海新跃仪表厂 | Zero-leakage hydraulic zero position lock |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103498825B (en) | 2016-01-06 |
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