CN202520680U - Novel direct-acting overflow valve - Google Patents
Novel direct-acting overflow valve Download PDFInfo
- Publication number
- CN202520680U CN202520680U CN 201220160119 CN201220160119U CN202520680U CN 202520680 U CN202520680 U CN 202520680U CN 201220160119 CN201220160119 CN 201220160119 CN 201220160119 U CN201220160119 U CN 201220160119U CN 202520680 U CN202520680 U CN 202520680U
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- CN
- China
- Prior art keywords
- valve
- valve body
- screw rod
- spring
- end cover
- 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 discloses a novel direct-acting overflow valve, which comprises an upper end cover and a valve body, wherein the upper end cover and the valve body are arranged in a matching way; the upper end cover is provided with a screw rod which is in threaded connection with the upper end cover; the outer end of the screw rod is provided with a hand wheel; one end of the screw rod which extends into the inner cavity of the valve body through the upper end cover is provided with a piston which is matched with the inner cavity of the valve body; a thin spring, a thick spring and a conical valve core are arranged in sequence on the lower end face of the piston; the conical valve core is pressed against an oil inlet hole formed in the lower end of the valve body; and the side wall of the inner cavity of the valve body is provided with an oil leakage hole which is opposite to the thick spring. According to the overflow valve, the adjustable system pressure is high, so that overflow of the direct-acting overflow valve can be realized in a wide pressure range without any complex structure, and the pressure of a system is adjusted.
Description
Technical field
The utility model relates to a kind of novel direct-acting overflow valve.
Background technique
Direct-acting overflow valve is that the pressure oil in the dependence system acts directly on the spool and balances each other with spring force, controls the switching motion of spool.In structural drawing, fundamental diagram and the graphic symbol of direct-acting overflow valve; P is a filler opening; T is a return opening, and inlet pressure oil acts on the bottom end face of spool through the damping hole a in the middle of the spool, and active area is A; The power that pressure oil acts on this end face is pA, and the pretightening force that pressure adjusting spring acts on the spool is Fs.When import oil pressure p hour, promptly during pA≤Fs, spool is in lower end position under the effect of spring, P and T two hydraulic fluid ports are separated, valve port is closed, oil return inlet T does not have fluid and flows back to fuel tank (not overflow), is normally off.When the import oil pressure raises, when the active force that is produced in the spool lower end surpasses the impacting force Fs of spring, promptly during pA＞Fs, move on the spool; Spring is compressed, and moves on the spool, and valve port is opened; P and T connect, and fluid just flows back to fuel tank from oil return inlet T, and relief valve begins overflow.Spring force on the spool increases along with the increase of opening amount, until balancing each other with hydraulic action.
The deficiency of existing technology: a, structure are complicated; B, only be applicable to overflow in pressure range of relative narrower.
The model utility content
The utility model purpose is to the defective that existing technology exists a kind of novel direct-acting overflow valve to be provided.
The utility model is for realizing above-mentioned purpose; Adopt following technological scheme: a kind of novel direct-acting overflow valve, comprise upper end cap and valve body, said upper end cap cooperates installation with valve body; Said upper end cap is provided with the screw rod that is threaded with it; Said screw rod outer end is provided with handwheel, and said screw rod is provided with the piston that matches with said body cavity through the end that upper end cap stretches into body cavity, and said piston lower surface is equipped with hairspring, bulky spring and taper valve core successively; Said taper valve core is connected on the oil inlet hole that said valve body lower end is provided with, and said body cavity sidewall is provided with the draining hole relative with said bulky spring.
The beneficial effect of the utility model: it is bigger that this relief valve can be adjusted system pressure, do not need complicated structure just can make the direct-acting overflow valve can overflow in the pressure range of broad like this, thus the pressure of adjust system.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure 1, handwheel, 2, screw rod, 3, upper end cap, 4, piston, 5, valve body, 6, hairspring, 7, bulky spring, 8, taper valve core, 9, oil inlet hole, 10, the draining hole.
Embodiment
Among Fig. 1; A kind of novel direct-acting overflow valve comprises upper end cap 3 and valve body 5, and said upper end cap 3 cooperates installation with valve body 5; Said upper end cap 3 is provided with the screw rod 2 that is threaded with it; Said screw rod 2 outer ends are provided with handwheel, and said screw rod 2 is provided with the piston 4 that matches with said valve body 5 inner chambers through the end that upper end cap 3 stretches into valve body 5 inner chambers, and said piston 4 lower end surfaces are equipped with hairspring 6, bulky spring 7 and taper valve core 8 successively; Said taper valve core 8 is connected on the oil inlet hole 9 that said valve body 5 lower ends are provided with, and said valve body 5 intracavity sidewalls are provided with the draining hole 10 relative with said bulky spring 7.
Pressure oil gets into relief valve from the oil inlet hole 9 of valve body 5 bottoms; Pressure oil acts on the bottom of taper valve core 8; When the effect area is A; The pressure oil of oil is p, and the power that acts on this end face is pA, and the pretightening force that spring (perhaps hairspring 6 and bulky spring 7 are together) acts on the taper valve core 8 is Fs.When import oil pressure p hour, promptly during pA≤Fs, taper valve core 8 is in lower end position under the effect of spring (perhaps hairspring 6 with bulky spring 7 together); Oil inlet hole 9 and draining hole 10 are separated; Valve port is closed, and no fluid flows back to fuel tank (not overflow), is normally off.When the import oil pressure raises, when the active force that is produced in the spool lower end surpasses the impacting force Fs of spring (perhaps hairspring 6 with bulky spring 7 together), promptly during pA＞Fs; Move on the spool, spring is compressed, and moves on the taper valve core 8; Valve port is opened; Oil inlet hole 9 is connected with draining hole 10, and fluid just flows back to fuel tank from draining hole 10, and relief valve begins overflow.Rotate handwheel 1 screw rod 2 is moved up and down, thereby the pretightening force that can change spring reaches the purpose of pressure regulation.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (1)
1. novel direct-acting overflow valve; Comprise upper end cap and valve body, said upper end cap cooperates installation with valve body, it is characterized in that; Said upper end cap is provided with the screw rod that is threaded with it; Said screw rod outer end is provided with handwheel, and said screw rod is provided with the piston that matches with said body cavity through the end that upper end cap stretches into body cavity, and said piston lower surface is equipped with hairspring, bulky spring and taper valve core successively; Said taper valve core is connected on the oil inlet hole that said valve body lower end is provided with, and said body cavity sidewall is provided with the draining hole relative with said bulky spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220160119 CN202520680U (en) | 2012-04-16 | 2012-04-16 | Novel direct-acting overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220160119 CN202520680U (en) | 2012-04-16 | 2012-04-16 | Novel direct-acting overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520680U true CN202520680U (en) | 2012-11-07 |
Family
ID=47103632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220160119 Expired - Fee Related CN202520680U (en) | 2012-04-16 | 2012-04-16 | Novel direct-acting overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520680U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291986A (en) * | 2013-06-26 | 2013-09-11 | 无锡商业职业技术学院 | Directly-operated type reducing valve |
| CN107795543A (en) * | 2017-10-23 | 2018-03-13 | 西南交通大学 | A kind of steel arch-shelf for soft rock large deformation and release can component and steel arch frame construction method |
| CN111795033A (en) * | 2020-07-16 | 2020-10-20 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN113757424A (en) * | 2021-08-02 | 2021-12-07 | 肇庆学院 | Low-cavitation parallel overflow valve |
-
2012
- 2012-04-16 CN CN 201220160119 patent/CN202520680U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291986A (en) * | 2013-06-26 | 2013-09-11 | 无锡商业职业技术学院 | Directly-operated type reducing valve |
| CN107795543A (en) * | 2017-10-23 | 2018-03-13 | 西南交通大学 | A kind of steel arch-shelf for soft rock large deformation and release can component and steel arch frame construction method |
| CN111795033A (en) * | 2020-07-16 | 2020-10-20 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN111795033B (en) * | 2020-07-16 | 2022-06-24 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN113757424A (en) * | 2021-08-02 | 2021-12-07 | 肇庆学院 | Low-cavitation parallel overflow 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: 20121107 Termination date: 20140416 |