CN201751601U - Novel proportional overflow valve - Google Patents
Novel proportional overflow valve Download PDFInfo
- Publication number
- CN201751601U CN201751601U CN2010202655128U CN201020265512U CN201751601U CN 201751601 U CN201751601 U CN 201751601U CN 2010202655128 U CN2010202655128 U CN 2010202655128U CN 201020265512 U CN201020265512 U CN 201020265512U CN 201751601 U CN201751601 U CN 201751601U
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- Prior art keywords
- valve
- main valve
- valve body
- guide
- spool
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- Expired - Fee Related
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Abstract
A novel proportional overflow valve, which is simple in processing and high in control efficiency, has a pilot structure. A pilot part is integrally casted with a main valve part. A main valve core and a valve pocket have a plug-in type structure. The dumbbell-like structure of a pilot valve core enables to reduce the contact area with a valve body. A flat-bottomed hole for fixing a spring is provided in the valve body, eliminating a spring base. A signal oil way goes by the main valve core, simplifying the valve body processing.
Description
Technical field
The utility model relates to hydraulic control valve, especially relates to a kind of novel proportional pressure control valve.
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.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 unnecessary 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 by electrical signal changes electromagnet thrust size, thus the switch pressure of control valve.
The model utility content
The utility model provides a kind of high novel proportional pressure control valve of simple control efficiency of processing.
The technological scheme that its technical problem that solves the utility model adopts is:
Novel proportional pressure control valve comprises pilot valve part and primary valve part, and 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, and main valve plug realizes that with guide's spool oil circuit is communicated with by semicircle orifice, runner.
The pilot valve part is made up of guide's spool, screw rod and proportion electro-magnet, the afterbody of guide's spool is near proportion electro-magnet, the conical nose of guide's spool is sealed the damping hole of screw head in the mode of inserting, the afterbody of screw rod stretches out outside the valve body, and the afterbody of guide's spool adopts longitudinal section H shape, the octagonal dumbbell shaped structure of cross section.
Primary valve part is made up of main valve housing, main valve plug, valve seat, main valve plug spring, main valve housing places valve body, main valve plug spring and main valve plug are loaded in the cylindrical shape main valve housing, have flat-bottom hole in valve body and the main valve plug, main valve plug spring one end is inserted in the flat-bottom hole of valve body, 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 beneficial effects of the utility model are, main valve body and guide's valve body are cast inblock, and 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 by main valve plug.
Description of drawings
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Fig. 1 is this novel proportional pressure control valve front section view;
Fig. 2 is this novel proportional pressure control valve facade view;
Fig. 3 is the pilot valve cored structure schematic representation in this novel proportional pressure control valve;
Fig. 4 is the main valve plug structural representation in this novel proportional pressure control valve.
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 hole, 17. runners, 18. maximum pressure protective gears, 19. runners; 20. surface of contact, 21. tapped holes, 22. tapped holes, 23. balancing slits.
Embodiment:
Guide's part is made up of screw rod 2, guide's spool 15 and proportion electro-magnet 14, by changing the size of the damping hole 16 in the screw rod 2, can obtain different pressure ratings.
Primary valve part 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 introduce in the pilot valve by main valve plug; runner 3 is arranged on the valve body 1; can make signal oil introduce pilot valve, also can install maximum pressure protective gear 18 additional by annular chamber 4 to runner 17.
The A mouth pressure acts on main valve plug 10 bottoms, and simultaneously, by 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 by 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 by 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 by 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 improved the sensitivity of valve; The pilot valve cored structure of Fig. 3 makes the spool quality alleviate simultaneously, the little sensitivity that improves valve of inertia during motion.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, this flat-bottom hole processing is simple, and effective fixing spring, make spring that certain guiding be 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 utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. novel proportional pressure control valve, comprise pilot valve part and primary valve part, by a valve body (1) be installed in the outer proportion electro-magnet (14) of valve body (1) and constitute, it is characterized in that, valve body (1) inside is provided with guide's spool (15) and main valve plug (10), and main valve plug (10) realizes that with guide's spool (15) oil circuit is communicated with by semicircle orifice (6), runner (3).
2. novel proportional pressure control valve according to claim 1, it is characterized in that, the pilot valve part is made up of guide's spool (15), screw rod (2) and proportion electro-magnet (14), the afterbody of guide's spool (15) is near proportion electro-magnet (14), the conical nose of guide's spool (15) is sealed the damping hole (16) of screw rod (2) head in the mode of inserting, the afterbody of screw rod (2) stretches out outside the valve body (1), the afterbody of guide's spool (15) adopts longitudinal section H shape, the octagonal dumbbell shaped structure of cross section, slides in valve body (1) with surface of contact (20).
3. novel proportional pressure control valve according to claim 1, it is characterized in that, primary valve part is made up of main valve housing (13), main valve plug (10), valve seat (9), main valve plug spring (4), valve body (1) and main valve plug (10) are loaded in the cylindrical shape main valve housing (13), have flat-bottom hole in valve body (1) and the main valve plug (10), 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 |
|---|---|---|---|
| CN2010202655128U CN201751601U (en) | 2010-07-20 | 2010-07-20 | Novel proportional overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202655128U CN201751601U (en) | 2010-07-20 | 2010-07-20 | Novel proportional overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201751601U true CN201751601U (en) | 2011-02-23 |
Family
ID=43602008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202655128U Expired - Fee Related CN201751601U (en) | 2010-07-20 | 2010-07-20 | Novel proportional overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201751601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944839A (en) * | 2017-12-21 | 2019-06-28 | 罗伯特·博世有限公司 | The type core of the valve chest of the hydraulic direction valve of pre-control and the hydraulic direction valve for this pre-control |
-
2010
- 2010-07-20 CN CN2010202655128U patent/CN201751601U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944839A (en) * | 2017-12-21 | 2019-06-28 | 罗伯特·博世有限公司 | The type core of the valve chest of the hydraulic direction valve of pre-control and the hydraulic direction valve for this pre-control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110223 Termination date: 20160720 |