CN202073859U - Pilot operated type overflow valve - Google Patents
Pilot operated type overflow valve Download PDFInfo
- Publication number
- CN202073859U CN202073859U CN2011201697772U CN201120169777U CN202073859U CN 202073859 U CN202073859 U CN 202073859U CN 2011201697772 U CN2011201697772 U CN 2011201697772U CN 201120169777 U CN201120169777 U CN 201120169777U CN 202073859 U CN202073859 U CN 202073859U
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- CN
- China
- Prior art keywords
- valve
- pilot
- valve seat
- shaped ring
- pilot operated
- 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 pilot operated type overflow valve which comprises a valve core (1), a first O-shaped ring (2), a valve bush (3), a pilot valve seat (4), a thread sleeve (5), a pressure regulating spring (6), a pressure regulating bolt (7), a spacer (8), a tightening nut (9), a second O-shaped ring (10), a valve seat (11), a third O-shaped ring (12), a pilot valve (13), a retainer (14), a fourth O-shaped ring (15) and a restoring spring (16); the valve bush (3) and a jack are sealed by adopting a conical surface; the left end of the valve core (1) props against the pilot valve seat (4) by the restoring spring (16); and the left end of the pilot valve seat (4) props against the pilot valve (13). The pilot operated type overflow valve is widely applied to a multiway valve of a small-sized excavator hydraulic system and reduces the fatigue damage to the valve after subjected to cyclic loading; and the reliability of the valve is increased in environments of large load change, large force impact, high starting frequency and harsh and changeable working conditions for the use of the excavator.
Description
Technical field
The utility model belongs to the relief valve field, particularly relates to a kind of pilot operated compound relief valve.
Background technique
Relief valve is made up of relief valve and one-way valve.When system pressure reached the cracking pressure of relief valve, relief valve was opened, the pump off-load; When system pressure was reduced to the closing pressure of relief valve, relief valve cut out, and pump is to system loads.Pressure when making the pump off-load is called pressure unloading, and the pressure that makes pump be in loaded state is called on-load pressure.
But also there are some defectives in present relief valve, and under the situation big in load variations, that operating modes such as impact force is big, open frequency height are relatively poor, the relief valve wearing and tearing are very fast, and working life is not high.
The model utility content
Technical problem to be solved in the utility model provides a kind of pilot operated compound relief valve, to solve defective of the prior art.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of pilot operated compound relief valve is provided, comprises spool, an o type circle, valve pocket, guide valve seat, swivel nut, pressure adjusting spring, pressure regulating screw, pad is pieced together jack panel, the 2nd o type circle, valve seat, the 3rd o type circle, pilot valve, back-up ring, the 4th o type circle, Returnning spring, adopt conical surface seal between described valve pocket and the jack, the spool left end props up guide valve seat by Returnning spring, and the left end of guide valve seat props up pilot valve.
Described spool is placed in the valve pocket inner chamber.
Beneficial effect
The selection of the utility model main valve plug and the improvement of processing technology make its sealing cone reduce wearing and tearing, improve sealing, reliability and increase the service life.Be widely used on the mini-excavator hydraulic system multi-way valve, reduced in the fatigue ruption that is subjected under the alternate load valve being caused, improved that this valve is big in load variations, impact force is big, open frequency is high and environment that the excavator applying working condition is abominable changeable under the reliability of working.
Description of drawings
Fig. 1 is the utility model half sectional view.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 1, a kind of pilot operated compound relief valve comprises spool 1, the one o type circle 2, valve pocket 3, guide valve seat 4, swivel nut 5, pressure adjusting spring 6, pressure regulating screw 7, pad 8 is pieced together jack panel 9, the two o type circles 10, valve seat 11, the 3rd o type circle 12, pilot valve 13, back-up ring 14, the 4th o type circle 15, Returnning spring 16 adopts conical surface seal between described valve pocket 3 and the jack, and P mouth fluid props up guide valve seat 4 by spool 1 left end by Returnning spring 16, when arrive the spring setting pressure 90% the time, pilot valve 13 is opened, and P realizes growing stream to T, up to the highest setting value of spring; The left end of guide valve seat 4 props up pilot valve 13.
Described spool 1 is placed in valve pocket 3 inner chambers.
Claims (2)
1. pilot operated compound relief valve, comprise spool (1), an o type circle (2), valve pocket (3), guide valve seat (4), swivel nut (5), pressure adjusting spring (6), pressure regulating screw (7), pad (8), piece together jack panel (9), the 2nd o type circle (10), valve seat (11), the 3rd o type circle (12), pilot valve (13), back-up ring (14), the 4th o type circle (15), Returnning spring (16), it is characterized in that: adopt conical surface seal between described valve pocket (3) and the jack, spool (1) left end props up guide valve seat (4) by Returnning spring (16), and the left end of guide valve seat (4) props up pilot valve (13).
2. a kind of pilot operated compound relief valve according to claim 1 is characterized in that: described spool (1) is placed in valve pocket (3) inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201697772U CN202073859U (en) | 2011-05-24 | 2011-05-24 | Pilot operated type overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201697772U CN202073859U (en) | 2011-05-24 | 2011-05-24 | Pilot operated type overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202073859U true CN202073859U (en) | 2011-12-14 |
Family
ID=45111963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201697772U Expired - Fee Related CN202073859U (en) | 2011-05-24 | 2011-05-24 | Pilot operated type overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202073859U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644339A (en) * | 2013-11-25 | 2014-03-19 | 大连元利流体技术有限公司 | Pollution resistant pilot operated relief valve |
| CN104197046A (en) * | 2014-09-11 | 2014-12-10 | 宁波市博尔法液压有限公司 | Multi-way valve with unloading protection function |
| CN104696315A (en) * | 2015-02-02 | 2015-06-10 | 浙江高宇液压机电有限公司 | Anti-pollution piloted relief valve |
-
2011
- 2011-05-24 CN CN2011201697772U patent/CN202073859U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644339A (en) * | 2013-11-25 | 2014-03-19 | 大连元利流体技术有限公司 | Pollution resistant pilot operated relief valve |
| CN104197046A (en) * | 2014-09-11 | 2014-12-10 | 宁波市博尔法液压有限公司 | Multi-way valve with unloading protection function |
| CN104197046B (en) * | 2014-09-11 | 2016-10-05 | 宁波市博尔法液压有限公司 | A kind of banked direction control valves of band off-load protection |
| CN104696315A (en) * | 2015-02-02 | 2015-06-10 | 浙江高宇液压机电有限公司 | Anti-pollution piloted relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20140524 |