CN102338135A - Proportional relief valve - Google Patents
Proportional relief valve Download PDFInfo
- Publication number
- CN102338135A CN102338135A CN2010102317287A CN201010231728A CN102338135A CN 102338135 A CN102338135 A CN 102338135A CN 2010102317287 A CN2010102317287 A CN 2010102317287A CN 201010231728 A CN201010231728 A CN 201010231728A CN 102338135 A CN102338135 A CN 102338135A
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- valve
- main valve
- guide
- spool
- valve body
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Abstract
The invention relates to a proportional relief valve which has the advantages of simplicity in processing and high control efficiency. The relief valve is of a pilot-type structure, a pilot part and a main valve part are integrally casted, a main valve core and a valve sleeve are of a plug-in type structure; the contact area of the dumbbell-shaped structure of a pilot valve core and a valve body is reduced, and a flat-bottom hole is arranged in the valve body and used for fixing a spring, thus a spring seat is omitted; and a signal oil way passes through the main valve core, thereby simplifying the valve body processing.
Description
Technical field
The present invention relates to hydraulic control valve, especially relate to proportional pressure control valve.
Background technique
Relief valve is a kind of hydraulic pressure control valve, in hydraulic equipment, mainly plays level pressure overflow effect and safety protection effect.Level pressure overflow effect: in metering pump throttling regulating system, metering pump provides constant flow rate, when system pressure increases; Traffic demand is reduced; This moment, relief valve was opened, and made the extra flow oil sump tank that overflows, and assurance relief valve inlet pressure is that pump discharge pressure is constant.The safety protection effect: during the system proper functioning, valve closing is opened overflow when having only load to surpass the limit of regulation, carries out overload protection, and system pressure is no longer increased.
Proportional pressure control valve is that a kind of guide with pilot operated compound relief valve partly changes proportion electro-magnet into, and the power through electrical signal changes electromagnet thrust size, thus the switch pressure of control valve.
Summary of the invention
The present invention provides a kind of high proportional pressure control valve of simple control efficiency of processing.
The technical solution adopted for the present invention to solve the technical problems is:
Proportional pressure control valve; Comprise pilot valve and main valve, the proportion electro-magnet outer with being installed in valve body by a valve body constitutes, and valve inner is provided with guide's spool and main valve plug; Main valve plug realizes that with guide's spool oil circuit is communicated with through semicircle orifice, runner; Guide's spool and main valve plug are arranged in the valve body that cast inblock forms, and the afterbody of guide's spool adopts longitudinal section H shape, the octagonal dumbbell shaped structure of cross section, have the flat-bottom hole of installation main valve plug spring in valve body and the main valve plug.
Pilot valve is made up of guide's spool screw rod and proportion electro-magnet, and the afterbody of guide's spool is near proportion electro-magnet, and the conical nose of guide's spool is sealed the damping hole of screw head, and guide's spool slides in valve body, and the afterbody of screw rod stretches out outside the valve body.
Main valve is made up of main valve housing, main valve plug, valve seat, main valve plug spring; Valve body and main valve plug are loaded in the cylindrical shape main valve housing; Main valve plug spring one end is inserted in the flat-bottom hole of valve body, and the other end is inserted in the flat-bottom hole of main valve plug, and valve seat props up main valve plug at the oiler of valve body.
The invention has the beneficial effects as follows that main valve body and guide's valve body are cast inblock, compact structure has reduced the seepage link; Main valve plug, valve pocket are the plug-in type structure, help installing and maintenance; Guide's spool of new structure has alleviated own wt, has reduced the area of contact with valve body, has reduced frictional force, has improved the sensitivity of valve; The main valve plug spring is directly packed in the flat-bottom hole of valve body, can save spring seat, and processing is simple; The signal oil oil circuit has reduced the processing of valve body through main valve plug.
Description of drawings
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
Fig. 1 is a proportional pressure control valve front section view of the present invention;
Fig. 2 is a proportional pressure control valve facade view of the present invention;
Fig. 3 is the pilot valve cored structure schematic representation in the proportional pressure control valve of the present invention;
Fig. 4 is the main valve plug structural representation in the proportional pressure control valve of the present invention.
Among the figure, 1. valve body, 2. screw rod, 3. runner, 4. main valve plug spring, 5. circular trough; 6. semicircle orifice, 7. damping, 8. plug screw, 9. valve seat, 10. main valve plug, 11. ring cavities; 12. damping, 13. main valve housings, 14. proportion electro-magnets, 15. guide's spools, 16. damping holes, 17. runners; 18. the maximum pressure protective gear, 19. runners, 20. surface of contact, 21. tapped holes, 22. tapped holes, 23. balancing slits.
Embodiment:
Pilot valve is made up of screw rod 2, guide's spool 15 and proportion electro-magnet 14, through changing the size of the damping hole 16 in the screw rod 2, can obtain different pressure ratings.
Main valve is made up of main valve housing 13, main valve plug 10, valve seat 9 and main valve plug spring 4.Main valve plug 10 has tapped hole 21 and tapped hole 22, is used to adorn damper, makes signal oil pass through main valve plug and introduces in the pilot valve; Runner 3 is arranged on the valve body 1; Can make signal oil introduce pilot valve, also can pass through annular chamber 4 to runner 17, install maximum pressure protective gear 18 additional.
The A mouth pressure acts on main valve plug 10 bottoms, and simultaneously, through damping 7, annular chamber 11 and damping 12, pressure also acts on the spring-loaded face of main valve plug 10.Hydraulic coupling on guide's spool 15 is offset the ouput force of proportion electro-magnet 14 setting values through semicircle orifice 6, runner 3 and damping hole 16, if hydraulic coupling surpasses the proportion electro-magnet ouput force, guide's spool 15 is opened; Because guide oil arrives through hydraulic fluid port Y backflow fuel tank through runner 19; Damping hole 7 produces pressure drops and also overcomes main valve plug spring 4 and promote main valve plugs 10, and the A mouth is communicated with oil circuit between the B mouth, no longer includes the pressure rising; Can and limit pressure maximum through hydraulic fluid port X off-load, or do the secondary pilot pressure.
Among the area of contact of guide's spool and valve body such as Fig. 3 20 effectively reduced frictional force, thereby the pilot valve cored structure that has improved sensitivity while Fig. 3 of valve makes the spool quality alleviate, the little sensitivity that improves valve of inertia during motion; On main valve plug 10, open balancing slit 23, reduce lateral force (lateral force causes quiet frictional force), thus the sensitivity that has improved valve.It is 1600mA that 14 of proportion electro-magnets are selected the control electric current for use, Duos one times than original 800mA commonly used, has improved the control accuracy of pressure; The dead band size is still about 80mA to 100mA simultaneously; But shared percentage reduces greatly, has improved the control range when low pressure, improves the sensitivity of valve.The main valve plug spring is directly packed in the flat-bottom hole of valve body, and this flat-bottom hole processing is simple, and effective fixing spring; Make spring that certain guiding arranged, prevent main valve plug spring 4 crooked deviations, the use that can save spring seat; In main valve plug, also use the flat-bottom hole of same structure; Main valve plug, main valve housing are the plug-in type structure, and it is convenient that simplified overhauling is installed, and fix with valve seat 9.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. proportional pressure control valve; Comprise pilot valve and main valve; By a valve body (1) be installed in the outer proportion electro-magnet (14) of valve body (1) and constitute, valve body (1) set inside has guide's spool (15) and main valve plug (10), and main valve plug (10) is communicated with guide's spool (15) realization oil circuit through semicircle orifice (6), runner (3); It is characterized in that; Guide's spool (15) and main valve plug (10) are arranged in the valve body (1) that cast inblock forms, and the afterbody of guide's spool (15) adopts longitudinal section H shape, the octagonal dumbbell shaped structure of cross section, have the flat-bottom hole of installation main valve plug spring (4) in valve body (1) and the main valve plug (10).
2. proportional pressure control valve according to claim 1; It is characterized in that; Pilot valve is made up of guide's spool (15), screw rod (2) and proportion electro-magnet (14), and the afterbody of guide's spool (15) is near proportion electro-magnet (14), and the conical nose of guide's spool (15) is sealed the damping hole (16) of screw rod (2) head; Guide's spool (15) slides in valve body (1) with surface of contact (20), and the afterbody of screw rod (2) stretches out outside the valve body (1).
3. proportional pressure control valve according to claim 1; It is characterized in that; Main valve is made up of main valve housing (13), main valve plug (10), valve seat (9), main valve plug spring (4), and valve body (1) and main valve plug (10) are loaded in the cylindrical shape main valve housing (13), and main valve plug spring (4) one ends are inserted in the flat-bottom hole of valve body (1); The other end is inserted in the flat-bottom hole of main valve plug (10), and valve seat (9) props up main valve plug (10) at the oiler of valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102317287A CN102338135A (en) | 2010-07-20 | 2010-07-20 | Proportional relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102317287A CN102338135A (en) | 2010-07-20 | 2010-07-20 | Proportional relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102338135A true CN102338135A (en) | 2012-02-01 |
Family
ID=45514030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102317287A Pending CN102338135A (en) | 2010-07-20 | 2010-07-20 | Proportional relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102338135A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662222A (en) * | 2018-06-13 | 2018-10-16 | 上海立新液压有限公司 | A kind of pilot-operated type threeway proportional pressure-reducing valve |
| CN111692148A (en) * | 2020-04-30 | 2020-09-22 | 武汉船用机械有限责任公司 | Safety valve for hydraulic pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2431429Y (en) * | 2000-05-09 | 2001-05-23 | 杭州精工液压机电制造有限公司 | Guide controlled proportional relief valve |
| CN2450424Y (en) * | 2000-11-14 | 2001-09-26 | 湘潭工学院 | Leading overflow valve |
| CN200989483Y (en) * | 2006-12-22 | 2007-12-12 | 陈健 | Decompression valve for pump use |
| CN101149068A (en) * | 2006-09-18 | 2008-03-26 | 湖南科技大学 | Electricity liquid ratio relief valve |
| CN201461572U (en) * | 2009-08-06 | 2010-05-12 | 上海科鑫电液控制设备有限公司 | Six-path pilot-operated proportional relief valve |
| CN201513402U (en) * | 2009-09-29 | 2010-06-23 | 山东泰丰液压设备有限公司 | Pilot-operated type proportional relief valve |
-
2010
- 2010-07-20 CN CN2010102317287A patent/CN102338135A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2431429Y (en) * | 2000-05-09 | 2001-05-23 | 杭州精工液压机电制造有限公司 | Guide controlled proportional relief valve |
| CN2450424Y (en) * | 2000-11-14 | 2001-09-26 | 湘潭工学院 | Leading overflow valve |
| CN101149068A (en) * | 2006-09-18 | 2008-03-26 | 湖南科技大学 | Electricity liquid ratio relief valve |
| CN200989483Y (en) * | 2006-12-22 | 2007-12-12 | 陈健 | Decompression valve for pump use |
| CN201461572U (en) * | 2009-08-06 | 2010-05-12 | 上海科鑫电液控制设备有限公司 | Six-path pilot-operated proportional relief valve |
| CN201513402U (en) * | 2009-09-29 | 2010-06-23 | 山东泰丰液压设备有限公司 | Pilot-operated type proportional relief valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662222A (en) * | 2018-06-13 | 2018-10-16 | 上海立新液压有限公司 | A kind of pilot-operated type threeway proportional pressure-reducing valve |
| CN111692148A (en) * | 2020-04-30 | 2020-09-22 | 武汉船用机械有限责任公司 | Safety valve for hydraulic pump |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120201 |