CN103291986A - Directly-operated type reducing valve - Google Patents
Directly-operated type reducing valve Download PDFInfo
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- CN103291986A CN103291986A CN2013102577184A CN201310257718A CN103291986A CN 103291986 A CN103291986 A CN 103291986A CN 2013102577184 A CN2013102577184 A CN 2013102577184A CN 201310257718 A CN201310257718 A CN 201310257718A CN 103291986 A CN103291986 A CN 103291986A
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- end cover
- pressure
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Abstract
The invention discloses a directly-operated type reducing valve which comprises an upper end cover, a valve body and a valve element, wherein the upper end cover and the valve body are installed in a matched mode, the upper end cover is provided with a screw rod which is in threaded connection with the upper end cover, the screw rod abuts against the valve element through a spring, the valve element is matched with an inner cavity of the valve body, an oil inlet hole is formed in the lower portion of the valve body, an oil outlet hole is formed in the upper portion of the valve body, and the oil inlet hole and the oil outlet hole are communicated through an annular groove of the valve element. The directly-operated type reducing valve further comprises a small hole which is communicated with the annular groove and the inner cavity of the valve body. An oil leakage hole which is communicated with an inner cavity of the upper end cover is formed in the side wall of the inner cavity of the upper end cover. The spring comprises a first spring and a second spring, wherein the first spring and the second spring are connected in series, and the diameter of the second spring is far smaller than that of the first spring. The screw rod can be rotated so as to move up and down, the pre-tightening force of the spring can be changed so that pressure can be regulated, and the directly-operated type reducing valve can regulate the pressure within a large range. A complex structure is not required, the directly-operated type reducing valve can regulate the pressure within a wide pressure range only through the two springs, and accordingly the regulating range of the pressure is increased.
Description
Technical field
The present invention relates to a kind of direct acting pressure.
Background technique
Direct acting pressure is that the pressure oil in the dependence system acts directly on the spool and balances each other with spring force, controls the movement of spool, makes the resistance of flow of fluid become big or diminishes by the area of passage that changes oil stream, thereby reach the purpose of decompression.In structural drawing, fundamental diagram and the graphic symbol of direct acting pressure, inlet pressure oil acts on the bottom end face of spool through the aperture a in the middle of the spool, active area is A, and 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, namely during pA≤Fs, spool is in lower end position under the effect of spring, the area of passage between spool and oil outlet is big, the resistance of flow of fluid is little, the pressure loss is also little.When the import oil pressure raises, when the active force that produces in the spool lower end surpasses the impacting force Fs of spring, when being pA＞Fs, move on the spool, spring is compressed, and the area of passage between spool and oil outlet diminishes, the resistance of flow of fluid is big, the pressure loss also increases, no matter inlet pressure becomes greatly still can diminish, fuel-displaced pressure remains unchanged substantially like this.But the deficiencies in the prior art part is: a, structure are complicated; B, only be applicable to decompression in pressure range of relative narrower.
Summary of the invention
The present invention seeks to provides a kind of novel direct acting pressure at the defective that prior art exists, and it is simple in structure, and is applicable to the decompression in the relative broad range.
The present invention adopts following technological scheme for achieving the above object:
Direct acting pressure, comprise upper end cap, valve body, spool, described upper end cap cooperates installation with valve body, upper end cap is provided with the screw rod that is threaded with it, screw rod withstands the spool that matches with body cavity by spring, be provided with oil inlet hole in valve body lower portion, be provided with oil outlet on valve body top, circular groove by spool makes oil inlet hole communicate with oil outlet, also comprise the aperture that communicates with described circular groove and body cavity, the intracavity sidewall of upper end cap is provided with the draining hole that communicates with described upper end cap inner chamber, and spring comprises that first spring that is in series and diameter are much smaller than second spring of first spring.Also comprise handwheel, described screw rod outer end is provided with handwheel.
Beneficial effect
Owing to can it be moved up and down rotating screw bolt, thereby the pretightening force that can change spring reaches the purpose of pressure regulation, this reduction valve is adjustable, and seamless power scope is bigger, the present invention does not need complicated structure, only use two springs just can make the direct acting pressure can be at wideer pressure range internal pressure-regulating, thereby increase range of regulation.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the figure 1, screw rod, 2, upper end cap, 3, hairspring, 4, bulky spring, 5, spool, 6, valve body.
Embodiment
As shown in Figure 1, direct acting pressure, comprise that upper end cap 2, valve body 6, described upper end cap 2 cooperate installation with valve body 6, also comprise spool, described upper end cap 2 is provided with the screw rod 1 that is threaded with it, described screw rod 1 stretches into the inner chamber of upper end cap 2, and described screw rod 1 withstands the spool that matches with described body cavity by spring, and described spring comprises that first spring that is in series and diameter are much smaller than second spring of first spring.Be provided with oil inlet hole in described valve body lower portion, be provided with oil outlet on described valve body top, circular groove by described spool makes oil inlet hole communicate with oil outlet, also comprise the aperture that communicates with described circular groove and body cavity, the intracavity sidewall of described upper end cap is provided with the draining hole that communicates with described upper end cap inner chamber.Also comprise handwheel, described screw rod outer end is provided with handwheel.
The aperture of inlet pressure oil in the middle of spool 5 acts on the bottom end face of spool 5, and active area is A, and 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 pA hour, namely during pA≤Fs, spool is in lower end position under the spring effect of (hairspring 3 and bulky spring 4 are together), the area of passage between spool and oil outlet is big, the resistance of flow of fluid is little, the pressure loss is also little.When the import oil pressure raises, when the active force that produces in the spool lower end surpasses the impacting force Fs of spring, when being pA＞Fs, move on the spool, spring is compressed, and the area of passage between spool and oil outlet diminishes, the resistance of flow of fluid is big, the pressure loss also increases, no matter inlet pressure can become greatly still and can diminish, the pressure of oil outlet all remains unchanged substantially like this.Rotating screw bolt 1 moves up and down it, thereby the pretightening force that can change spring reaches the purpose of pressure regulation, and the pretightening force of spring is because the structure of hairspring 3 and bulky spring 4 broadens the scope of its adjustment.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102577184A CN103291986A (en) | 2013-06-26 | 2013-06-26 | Directly-operated type reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102577184A CN103291986A (en) | 2013-06-26 | 2013-06-26 | Directly-operated type reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103291986A true CN103291986A (en) | 2013-09-11 |
Family
ID=49093326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102577184A Pending CN103291986A (en) | 2013-06-26 | 2013-06-26 | Directly-operated type reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103291986A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953466A (en) * | 2014-04-16 | 2014-07-30 | 温州瓯斯达电器实业有限公司 | Electric-control pressure regulator for fuel |
| CN104632742A (en) * | 2014-12-18 | 2015-05-20 | 高雅 | Direct action type reducing valve |
| CN105065741A (en) * | 2015-08-24 | 2015-11-18 | 中国科学院武汉岩土力学研究所 | Self-operated segmented pressure control valve |
| CN106051242A (en) * | 2016-07-22 | 2016-10-26 | 青岛力克川液压机械有限公司 | Double-acting overflow valve for hydraulic motor |
| CN109058199A (en) * | 2018-08-20 | 2018-12-21 | 宁波汉商液压有限公司 | A kind of stall proof clearance-type super-pressure relief valve |
| CN112392423A (en) * | 2020-12-23 | 2021-02-23 | 大庆油田有限责任公司 | Pulse well washing device for water injection well |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001242941A (en) * | 2000-02-29 | 2001-09-07 | Taiyo Ltd | Device for fluid pressure control |
| CN201851716U (en) * | 2010-11-09 | 2011-06-01 | 韩晓新 | Reducing valve |
| CN201875226U (en) * | 2010-11-09 | 2011-06-22 | 韩晓新 | Sequence valve |
| CN202520680U (en) * | 2012-04-16 | 2012-11-07 | 无锡商业职业技术学院 | Novel direct-acting overflow valve |
| CN202597318U (en) * | 2012-05-22 | 2012-12-12 | 无锡商业职业技术学院 | Novel hydraulic throttle valve |
| CN203421244U (en) * | 2013-06-26 | 2014-02-05 | 无锡商业职业技术学院 | Direct-acting pressure reduction valve |
-
2013
- 2013-06-26 CN CN2013102577184A patent/CN103291986A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001242941A (en) * | 2000-02-29 | 2001-09-07 | Taiyo Ltd | Device for fluid pressure control |
| CN201851716U (en) * | 2010-11-09 | 2011-06-01 | 韩晓新 | Reducing valve |
| CN201875226U (en) * | 2010-11-09 | 2011-06-22 | 韩晓新 | Sequence valve |
| CN202520680U (en) * | 2012-04-16 | 2012-11-07 | 无锡商业职业技术学院 | Novel direct-acting overflow valve |
| CN202597318U (en) * | 2012-05-22 | 2012-12-12 | 无锡商业职业技术学院 | Novel hydraulic throttle valve |
| CN203421244U (en) * | 2013-06-26 | 2014-02-05 | 无锡商业职业技术学院 | Direct-acting pressure reduction valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953466A (en) * | 2014-04-16 | 2014-07-30 | 温州瓯斯达电器实业有限公司 | Electric-control pressure regulator for fuel |
| CN104632742A (en) * | 2014-12-18 | 2015-05-20 | 高雅 | Direct action type reducing valve |
| CN105065741A (en) * | 2015-08-24 | 2015-11-18 | 中国科学院武汉岩土力学研究所 | Self-operated segmented pressure control valve |
| CN106051242A (en) * | 2016-07-22 | 2016-10-26 | 青岛力克川液压机械有限公司 | Double-acting overflow valve for hydraulic motor |
| CN106051242B (en) * | 2016-07-22 | 2019-01-04 | 青岛力克川液压机械有限公司 | A kind of hydraulic motor double acting overflow valve |
| CN109058199A (en) * | 2018-08-20 | 2018-12-21 | 宁波汉商液压有限公司 | A kind of stall proof clearance-type super-pressure relief valve |
| CN112392423A (en) * | 2020-12-23 | 2021-02-23 | 大庆油田有限责任公司 | Pulse well washing device for water injection well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130911 |