CN102251998B - Pilot overflow valve - Google Patents
Pilot overflow valve Download PDFInfo
- Publication number
- CN102251998B CN102251998B CN2011101757918A CN201110175791A CN102251998B CN 102251998 B CN102251998 B CN 102251998B CN 2011101757918 A CN2011101757918 A CN 2011101757918A CN 201110175791 A CN201110175791 A CN 201110175791A CN 102251998 B CN102251998 B CN 102251998B
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- guide
- spool
- main
- 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
Links
Landscapes
- Safety Valves (AREA)
Abstract
The invention discloses a pilot overflow valve comprising a pilot valve and a main valve. The pilot valve is sequentially connected with a pressure regulating screw barrel, a pilot valve bushing, a valve nut, a pressure regulating piston, a pilot spring, a pilot valve core, a pilot valve seat, a pilot pipe and a pilot screw plug in series from left to right; the pressure regulating screw barrel and the valve nut are sequentially sleeved on the pilot valve bushing, the pilot valve core is in a shape of cone, and the pilot valve seat is provided with a central hole over against the conical bottom of the pilot valve core; the main valve is a serial double valve surface with a structure of two cone valves; the conical bottom end of the pilot valve core is communicated with a back liquid cavity of the main valve body through the central hole of the pilot valve seat and is connected with a high-pressure cavity opening P through small holes of two throttle plugs; and the pilot pipe is communicated with a main pipe. The invention has the advantages that the structure is reasonable, and the runout of the pilot valve can be reduced, thus the working stability of the pilot valve can be improved.
Description
Technical field
The present invention relates to a kind of relief valve, is exactly a kind of pilot operated compound relief valve specifically.
Background technique
Relief valve is a kind of hydraulic pressure control valve, mainly plays level pressure overflow effect and safety protection effect in hydraulic equipment.Relief valve generally has two kinds of structures: the one, and straight ejector half relief valve, the 2nd, pilot-type relief valve.What wherein pilot operated compound relief valve was used in hydraulic system is many, it is the critical elements in hydraulic system, its effect is to guarantee that working line works under the pressure of setting up in advance, no matter how hydraulic giant outlet actual consumption flow changes, remains the substantially constant of pressure.Total discharge out of pumping plant minute is done two parts during through relief valve automatically, a for hydraulic giant or various flushing annex, another part of unnecessary flow auto-returned water tank.
But the most pilot operated compound relief valve, when work, can produce runout, noise, thereby make poor work stability.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of pilot operated compound relief valve that can improve working stability.
Technological scheme: for realizing above-mentioned technical problem, the technical solution used in the present invention is: a kind of pilot operated compound relief valve, comprise pilot valve and main valve, described pilot valve is serially connected with pressure regulation swivel nut, guide's valve pocket, valve nut, relief piston, guide's spring, guide's spool, guide's valve seat, pilot conduit and guide's screw plug from left to right successively, pressure regulation swivel nut and valve nut are socketed on valve pocket successively, described guide's spool is taper, is provided with the center hole faced at the bottom of the cone with guide's spool on described guide's valve seat; Described main valve comprises big plug, valve seat, lower valve base, valve pocket, main pipeline and the little screw plug be connected in series successively by from top to bottom, described valve seat, lower valve base and valve pocket form main valve body, at inner lower valve core, spool and the big spring of also being serially connected with successively from top to bottom of main valve body, described valve core housing is in the outside of lower valve core, at the lower valve core endoporus, two choke plugs are housed, have aperture on each choke plug, little spring is installed in big spring, the upper end portion of little spring faces the bottom of lower valve core, and the bottom of spool is stuck in valve pocket by back-up ring; The cone bottom of guide's spool communicates with main valve body back sap cavity, also is connected with hyperbaric chamber P mouth by the aperture on two choke plugs by guide's valve base center hole; Described pilot conduit communicates with main pipeline.
Working principle of the present invention: guide's spool front end is by guide's valve base center hole, with main valve body back sap cavity, communicate, and be connected with hyperbaric chamber P mouth by two choke plug apertures of lower valve core inner chamber, this feeds back on guide's spool the variation of water pressure on working line at any time.When the guided missile spring is regulated in the ban, when between choke plug and guide's valve seat, spool, cavity pressure is to certain pressure, active chamber just produces pressure, till being adjusted to the working pressure needed, at this moment just produces stable working pressure.When choke plug and guide's valve seat.Between spool, without pressure, now working pressure is zero.
In order to improve sealing effect, between described big plug and described valve seat, be provided with back-up ring and seal ring.
Beneficial effect: compared with prior art, advantage of the present invention is: rational in infrastructure, and can reduce the runout of pilot valve, thereby improve its working stability.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of pilot operated compound relief valve, comprise pilot valve and main valve, wherein, pilot valve is serially connected with pressure regulation swivel nut 1, guide's valve pocket 2, valve nut 3, relief piston 4, guide's spring 5, guide's spool 6, guide's valve seat 7, pilot conduit 8 and guide's screw plug 9 from left to right successively, and pressure regulation swivel nut 1 and valve nut 3 are socketed on guide's valve pocket 2 successively, and guide's spool 6 is taper, formerly guide valve seat 7 is provided with center hole 10, at the bottom of the cone of this center hole 10 and guide's spool 6, faces.Formerly between guide valve bushing 2 and relief piston 4, be provided with the O RunddichtringO.
Main valve is tandem bivalve face, two cone valve structures, it comprises the big plug 11 be connected in series successively by from top to bottom, valve seat 12, lower valve base 13, valve pocket 14, main pipeline 15 and little screw plug 16, valve seat 12, lower valve base 13 and valve pocket 14 form main valve body, at the inner lower valve core 17 that also is serially connected with successively from top to bottom of main valve body, spool 18 and big spring 19, spool 18 is enclosed within the outside of lower valve core 17, at lower valve core 17 endoporus, two choke plugs 20 are housed, have aperture on each choke plug 20, little spring 21 is installed in big spring 19, the upper end portion of little spring 21 faces the bottom of lower valve core 17, the bottom of spool 18 is stuck in valve pocket 14 by back-up ring 22, the cone bottom of guide's spool 6 communicates with main valve body back sap cavity, also is connected with hyperbaric chamber P mouth by the aperture on two choke plugs 20 by guide's valve seat 7 center holes 10, pilot conduit 8 communicates with main pipeline 15.Between big plug 11 and valve seat 12, between spool 18 and valve pocket 14, be respectively equipped with back-up ring 23 and O RunddichtringO, between choke plug 20 and big plug 11, between valve seat 12 and lower valve base 13, between lower valve core 17 and spool 18, be equipped with the O RunddichtringO.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a pilot operated compound relief valve, it is characterized in that, comprise pilot valve and main valve, described pilot valve is serially connected with pressure regulation swivel nut (1) from left to right successively, guide's valve pocket (2), valve nut (3), relief piston (4), guide's spring (5), guide's spool (6), guide's valve seat (7), pilot conduit (8) and guide's screw plug (9), pressure regulation swivel nut (1) and valve nut (3) are socketed on guide's valve pocket (2) successively, described guide's spool (6) is taper, be provided with the center hole (10) faced at the bottom of the cone with guide's spool (6) on described guide's valve seat (7), described main valve comprises the big plug (11) be connected in series successively by from top to bottom, valve seat (12), lower valve base (13), valve pocket (14), main pipeline (15) and little screw plug (16), described valve seat (12), lower valve base (13) and valve pocket (14) form main valve body, at the inner lower valve core (17) that also is serially connected with successively from top to bottom of main valve body, spool (18) and big spring (19), described spool (18) is enclosed within the outside of lower valve core (17), at lower valve core (17) endoporus, two choke plugs (20) are housed, each choke plug has aperture on (20), little spring (21) is installed in big spring (19), the upper end portion of little spring (21) faces the bottom of lower valve core (17), the bottom of spool (18) is stuck in valve pocket (14) by back-up ring (22), the cone bottom of guide's spool (6) communicates with main valve body back sap cavity, also is connected with hyperbaric chamber P mouth by the aperture on two choke plugs (20) by guide's valve base center hole (10), described pilot conduit (8) communicates with main pipeline (15).
2. pilot operated compound relief valve according to claim 1, is characterized in that, between described big plug (11) and described valve seat (12), is provided with back-up ring and seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101757918A CN102251998B (en) | 2011-06-28 | 2011-06-28 | Pilot overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101757918A CN102251998B (en) | 2011-06-28 | 2011-06-28 | Pilot overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102251998A CN102251998A (en) | 2011-11-23 |
| CN102251998B true CN102251998B (en) | 2013-12-11 |
Family
ID=44979489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101757918A Expired - Fee Related CN102251998B (en) | 2011-06-28 | 2011-06-28 | Pilot overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102251998B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162978B (en) * | 2018-10-22 | 2020-04-24 | 立信阀门集团有限公司 | Pilot-operated stop valve |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB990038A (en) * | 1961-04-13 | 1965-04-22 | Brakeshoe Internat S A | Improvements in high speed fluid control valves |
| CN86201695U (en) * | 1986-03-25 | 1987-05-06 | 陕西机械学院 | Piston type lead overflow valve |
| CN85109329A (en) * | 1985-12-26 | 1987-08-12 | 庄凤龄 | Pilot operated compound relief valve |
| CN87105075A (en) * | 1987-09-02 | 1988-10-12 | 沈阳工业大学 | Differential pressure safety valve for high-pressure large flow |
| CN2450424Y (en) * | 2000-11-14 | 2001-09-26 | 湘潭工学院 | Leading overflow valve |
| CN2524033Y (en) * | 2001-12-13 | 2002-12-04 | 浙江大学 | Low noise leading overflow valve |
| CN2786391Y (en) * | 2004-12-17 | 2006-06-07 | 上海华岛液压设备制造有限公司 | Pilot-operated overflow valve |
| CN200952500Y (en) * | 2006-06-12 | 2007-09-26 | 河南海力特机电制造有限公司 | Leading water base relief valve |
| CN200999897Y (en) * | 2006-12-20 | 2008-01-02 | 上海立新液压有限公司 | Drift diameter over-flow valve |
| CN201615267U (en) * | 2009-12-30 | 2010-10-27 | 成都威力生生物科技有限公司 | Pilot overflow valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4018208B2 (en) * | 1997-09-25 | 2007-12-05 | 豊興工業株式会社 | Pilot operated relief valve |
-
2011
- 2011-06-28 CN CN2011101757918A patent/CN102251998B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB990038A (en) * | 1961-04-13 | 1965-04-22 | Brakeshoe Internat S A | Improvements in high speed fluid control valves |
| CN85109329A (en) * | 1985-12-26 | 1987-08-12 | 庄凤龄 | Pilot operated compound relief valve |
| CN86201695U (en) * | 1986-03-25 | 1987-05-06 | 陕西机械学院 | Piston type lead overflow valve |
| CN87105075A (en) * | 1987-09-02 | 1988-10-12 | 沈阳工业大学 | Differential pressure safety valve for high-pressure large flow |
| CN2450424Y (en) * | 2000-11-14 | 2001-09-26 | 湘潭工学院 | Leading overflow valve |
| CN2524033Y (en) * | 2001-12-13 | 2002-12-04 | 浙江大学 | Low noise leading overflow valve |
| CN2786391Y (en) * | 2004-12-17 | 2006-06-07 | 上海华岛液压设备制造有限公司 | Pilot-operated overflow valve |
| CN200952500Y (en) * | 2006-06-12 | 2007-09-26 | 河南海力特机电制造有限公司 | Leading water base relief valve |
| CN200999897Y (en) * | 2006-12-20 | 2008-01-02 | 上海立新液压有限公司 | Drift diameter over-flow valve |
| CN201615267U (en) * | 2009-12-30 | 2010-10-27 | 成都威力生生物科技有限公司 | Pilot overflow valve |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11－94106A 1999.04.09 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102251998A (en) | 2011-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206159579U (en) | Pilot -operated type relief valve | |
| CN104454736A (en) | Load holding valve and running method thereof | |
| CN202040134U (en) | Cartridge balanced valve | |
| CN201851726U (en) | Pilot overflow valve | |
| CN102251998B (en) | Pilot overflow valve | |
| CN202531513U (en) | Back pressure valve for hydraulic oil return system | |
| CN203532127U (en) | Three-level pressure adjusting overflow valve | |
| CN203082304U (en) | Adjustable reducing valve | |
| CN204371812U (en) | A kind of load holding valve | |
| CN208605694U (en) | A kind of self-balancing steady flow control valve | |
| CN204628669U (en) | A kind of U-shaped pin quick-acting type reduction valve | |
| CN204459332U (en) | A kind of Pilot operated safety valve | |
| CN203214992U (en) | Simple pressure reducing valve | |
| CN204357815U (en) | Proportional pressure control valve | |
| CN201858407U (en) | Water-saving tap | |
| CN107940057B (en) | High-pressure cleaner plunger pump air-vent valve | |
| CN208331281U (en) | A kind of anti-cavitation corrosion cone valve structure | |
| CN204756134U (en) | Large -traffic proportion choke valve gas -tight loses mechanism | |
| CN201396497Y (en) | Valve device used for gas | |
| CN105422537A (en) | Pressure-increasing overflow valve | |
| CN2906250Y (en) | Automatic air-refilling check valve for use in pneumatic pressure tank | |
| CN204664513U (en) | Multi-purpose type gas control one-way valve | |
| CN215110749U (en) | Differential large-flow mining safety valve | |
| CN203783893U (en) | Gear pump internally provided with unloading device | |
| CN202851499U (en) | Reliever with a plurality of oil outlet cavity branches and used for water pressure test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20160628 |