CN104196802A - Variable type control valve - Google Patents
Variable type control valve Download PDFInfo
- Publication number
- CN104196802A CN104196802A CN201410453891.6A CN201410453891A CN104196802A CN 104196802 A CN104196802 A CN 104196802A CN 201410453891 A CN201410453891 A CN 201410453891A CN 104196802 A CN104196802 A CN 104196802A
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- cavity
- valve
- valve gap
- spool
- valve body
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Abstract
The invention provides a variable type control valve. The variable type control valve comprises a valve body, a valve deck and a valve element. The valve body is a shell with one open end. The valve deck is a hollow shaft with one open end. Two spaced shaft shoulders are arranged on the outer wall of the valve deck. The valve deck is sleeved with the valve body, the interior of the valve body is divided into two cavities through the valve deck and the two shaft shoulders on the valve deck, and an oil inlet communicated with the first cavity and an oil outlet communicated with the second cavity are formed in the valve body. The valve element is a shaft body with one end provided with a stepped hole and the other end provided with a blind hole, a circle of groove is formed in the outer wall of the valve element, the valve element is sleeved with the valve deck, a third cavity is defined by the groove of the valve element and the inner wall of the valve deck, and a fourth cavity is formed by the stepped hole of the valve element and the interior of the valve deck. The open end of the valve deck is provided with throttling pieces, springs are arranged in the fourth cavity, a fifth cavity is defined by the blind hole of the valve element and the throttling pieces, and check rings for holes are installed on the portions, located outside the throttling pieces, in the valve deck. The variable type control valve is simple in structure, flexible in installation mode and capable of effectively adjusting flow of liquid.
Description
Technical field
The present invention relates to forklift hydraulic system control gear, relate in particular to a kind of variable displacement control valve.
Background technique
In the forklift hydraulic system of high-pressure high-flow, when fork truck lifting oil cylinder is when declining, oil cylinder is high-speed motion under the effect of load, causes high speed piston to move to the terminal of stroke, tends to like this occur violent mechanical motion; Equally, during the piston cut of high-speed motion, also the water hammer of pipeline in hydraulic system be can cause, very large impact and noise caused.The phenomenon that high speed piston motion causes can affect the service behaviour of fork truck, damages the hydraulic element in oil hydraulic cylinder and fork truck.Therefore throttle grverning hydraulic element are installed in the hydraulic system of fork truck, and to carry out the excessive rate of descent of regulator solution cylinder pressure be very necessary.
Conventional throttle grverning hydraulic element are arranged on the throttling speed control circuit in cylinder device at present, the hydraulic circuit that this loop adopts metering pump, Flow valve and relief valve etc. to form conventionally.This structure relative complex, cost is high, energy loss is large, at the bottom of efficiency, heating is large, be commonly used in low pressure and the little equipment of power.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of simple in structure, mounting type flexibly, variable displacement control valve that Flow-rate adjustment efficiency is high.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme: variable displacement control valve, comprises valve body, valve gap and spool;
Valve body is the housing of an end opening;
Valve gap is the hollow shaft of an end opening, its outer wall is provided with two isolated shaft shoulders, the shaft shoulder is provided with outside thread, valve gap be sleeved in valve body and the inwall of the opening end of valve gap and relative valve body between leave space, the inwall of valve body is provided with the internal thread matching with outside thread on the shaft shoulder in the position of the shaft shoulder of corresponding valve gap, between the other end of valve gap relative with the opening end of valve gap and the opening end of valve body, seal ring is installed, valve gap and on two shaft shoulders the inside of valve body is divided into two cavitys, one of them is the first cavity between two shaft shoulders, another is the second cavity that is positioned at the inner side of two shaft shoulders, valve body is provided with the filler opening communicating with the first cavity and the oil outlet communicating with the second cavity,
Spool is that one end is provided with shoulder hole, the other end is provided with the axis body of blind hole, its outer wall is provided with a circle groove, valve core housing be contained in valve gap and that one end that is provided with shoulder hole of spool towards the inside of valve gap, the groove of spool and the inwall of valve gap enclose and form the 3rd cavity, the shoulder hole of spool and the inside of valve gap form the 4th cavity, valve gap is provided with above the first oilhole and above second oilhole that is communicated with the second cavity and the 3rd cavity that is communicated with the first cavity and the 4th cavity, spool is provided with above the 3rd oilhole that is communicated with the 3rd cavity and the 4th cavity,
The opening end of valve gap is provided with flow regulator pieces, in the 4th cavity, be provided with spring, spool its that one end that is provided with blind hole under the effect of spring is resisted against on flow regulator pieces, the blind hole of spool and flow regulator pieces enclose and form the 5th cavity, on flow regulator pieces, have the throttle orifice that is communicated with the second cavity and the 5th cavity, the porose back-up ring of using is installed in the outside that is positioned at flow regulator pieces in valve gap.
The action principle of this variable displacement control valve is: when oil cylinder hoists, the filler opening of liquid from valve body enters the first cavity, through the first oilhole, enter the 4th cavity, through the 3rd oilhole, enter the 3rd cavity again, through the second oilhole, enter the second cavity again, decline liquid enters the 5th cavity through throttle orifice, the oil outlet of remaining liq from valve body discharged, and now, oil cylinder at the uniform velocity hoists.When oil cylinder declines under the effect of load, because in-oil cylinder pressure raises, hydraulic coupling in the 5th cavity raises gradually, final hydraulic coupling overcomes spring force spool is moved towards the inside of valve gap, thereby spool is dwindled the overflow section of the first oilhole gradually, the flow that enters the liquid of the 4th cavity through the first oilhole reduces gradually, thereby reach the object of the movement velocity of controlling oil cylinder, and oil cylinder is under different loads, the displacement that spool moves is different, thereby reaches the speed of real requirement.
From technique scheme, variable displacement control valve provided by the invention simple in structure, mounting type is flexible, and can effectively regulate the flow of liquid.
As improvement of the present invention, the outer wall of spool is provided with some circle the first balancing slits, and the hole wall of the blind hole of spool is provided with circle second balancing slit.Adopt the radial force of this structure on can balance valve core, eliminate the lateral hydraulic force on spool.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the structural representation of the valve gap of one embodiment of the invention.
Fig. 3 is the structural representation of the spool of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Referring to Fig. 1, Fig. 2 and Fig. 3.
Variable displacement control valve, comprises valve body 1, valve gap 2 and spool 3;
Valve body 1 is the housing of an end opening;
Valve gap 2 is the hollow shaft of an end opening, its outer wall is provided with two isolated shaft shoulders 21, the shaft shoulder 21 is provided with outside thread, valve gap 2 be sleeved in valve body 1 and the inwall of the opening end of valve gap 2 and relative valve body 1 between leave space, the inwall of valve body 1 is provided with the internal thread matching with outside thread on the shaft shoulder 21 in the position of the shaft shoulder 21 of corresponding valve gap 2, between the other end of the valve gap 2 relative with the opening end of valve gap 2 and the opening end of valve body 1, seal ring 4 is installed, valve gap 2 and on two shaft shoulders 21 inside of valve body 1 is divided into two cavitys, one of them is the first cavity 51 between two shaft shoulders 21, another is the second cavity 52 that is positioned at the inner side of two shaft shoulders 21, valve body 1 is provided with the filler opening 11 communicating with the first cavity 51 and the oil outlet 12 communicating with the second cavity 52,
Spool 3 is provided with shoulder hole 31 for one end, the other end is provided with the axis body of blind hole 32, its outer wall is provided with a circle groove 33, spool 3 be sleeved in valve gap 2 and that one end that is provided with shoulder hole 31 of spool 3 towards the inside of valve gap 2, the groove 33 of spool 3 encloses and forms the 3rd cavity 53 with the inwall of valve gap 2, the shoulder hole 31 of spool 3 forms the 4th cavity 54 with the inside of valve gap, valve gap 2 is provided with four the first oilhole 22 and four the second oilholes 23 that are communicated with the second cavity 52 and the 3rd cavity 53 that are communicated with the first cavitys 51 and the 4th cavity 54, spool 3 is provided with three the 3rd oilholes 34 that are communicated with the 3rd cavity 53 and the 4th cavity 54,
The opening end of valve gap 2 is provided with flow regulator pieces 6, in the 4th cavity 54, be provided with spring 7, spool 3 its that one end that is provided with blind hole 32 under the effect of spring 7 is resisted against on flow regulator pieces 6, blind hole 32 and the flow regulator pieces 6 of spool 3 encloses and forms the 5th cavity 55, on flow regulator pieces 6, have the throttle orifice 61 that is communicated with the second cavity 52 and the 5th cavity 55, the outside that is positioned at flow regulator pieces 6 in valve gap 2 is installed porose with back-up ring 8.
The outer wall of spool 3 is provided with some circle the first balancing slits 35, and the hole wall of the blind hole 32 of spool 3 is provided with circle second balancing slit 36.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. variable displacement control valve, comprises valve body, valve gap and spool;
Valve body is the housing of an end opening;
Valve gap is the hollow shaft of an end opening, its outer wall is provided with two isolated shaft shoulders, the shaft shoulder is provided with outside thread, valve gap be sleeved in valve body and the inwall of the opening end of valve gap and relative valve body between leave space, the inwall of valve body is provided with the internal thread matching with outside thread on the shaft shoulder in the position of the shaft shoulder of corresponding valve gap, between the other end of valve gap relative with the opening end of valve gap and the opening end of valve body, seal ring is installed, valve gap and on two shaft shoulders the inside of valve body is divided into two cavitys, one of them is the first cavity between two shaft shoulders, another is the second cavity that is positioned at the inner side of two shaft shoulders, valve body is provided with the filler opening communicating with the first cavity and the oil outlet communicating with the second cavity,
Spool is that one end is provided with shoulder hole, the other end is provided with the axis body of blind hole, its outer wall is provided with a circle groove, valve core housing be contained in valve gap and that one end that is provided with shoulder hole of spool towards the inside of valve gap, the groove of spool and the inwall of valve gap enclose and form the 3rd cavity, the shoulder hole of spool and the inside of valve gap form the 4th cavity, valve gap is provided with above the first oilhole and above second oilhole that is communicated with the second cavity and the 3rd cavity that is communicated with the first cavity and the 4th cavity, spool is provided with above the 3rd oilhole that is communicated with the 3rd cavity and the 4th cavity,
The opening end of valve gap is provided with flow regulator pieces, in the 4th cavity, be provided with spring, spool its that one end that is provided with blind hole under the effect of spring is resisted against on flow regulator pieces, the blind hole of spool and flow regulator pieces enclose and form the 5th cavity, on flow regulator pieces, have the throttle orifice that is communicated with the second cavity and the 5th cavity, the porose back-up ring of using is installed in the outside that is positioned at flow regulator pieces in valve gap.
2. variable displacement control valve as claimed in claim 1, is characterized in that: the outer wall of spool is provided with some circle the first balancing slits, and the hole wall of the blind hole of spool is provided with circle second balancing slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453891.6A CN104196802B (en) | 2014-09-06 | 2014-09-06 | Variable displacement control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453891.6A CN104196802B (en) | 2014-09-06 | 2014-09-06 | Variable displacement control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196802A true CN104196802A (en) | 2014-12-10 |
| CN104196802B CN104196802B (en) | 2016-08-17 |
Family
ID=52082145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410453891.6A Active CN104196802B (en) | 2014-09-06 | 2014-09-06 | Variable displacement control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104196802B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678107A (en) * | 2017-01-19 | 2017-05-17 | 宁波江北宇洲液压设备厂 | Speed limiting valve special for forklift truck |
| CN108505969A (en) * | 2018-04-18 | 2018-09-07 | 盐城庆隆机械有限公司 | A kind of time-delay valve |
| CN110219848A (en) * | 2019-07-27 | 2019-09-10 | 蚌埠液力机械有限公司 | Integrated form variable control valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508448A (en) * | 2002-12-04 | 2004-06-30 | 株式会社岛津制作所 | Flow-control valve |
| DE102004020275A1 (en) * | 2004-03-15 | 2005-10-20 | Brueninghaus Hydromatik Gmbh | Valve |
| EP1619396A2 (en) * | 2004-07-23 | 2006-01-25 | Volvo Construction Equipment Holding Sweden AB | Variable regeneration valve of heavy equipment |
| CN202348806U (en) * | 2011-12-07 | 2012-07-25 | 燕山大学 | proportional cartridge valve with variable flow gain |
| CN204061394U (en) * | 2014-09-06 | 2014-12-31 | 蚌埠液力机械有限公司 | Variable displacement control valve |
-
2014
- 2014-09-06 CN CN201410453891.6A patent/CN104196802B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508448A (en) * | 2002-12-04 | 2004-06-30 | 株式会社岛津制作所 | Flow-control valve |
| DE102004020275A1 (en) * | 2004-03-15 | 2005-10-20 | Brueninghaus Hydromatik Gmbh | Valve |
| EP1619396A2 (en) * | 2004-07-23 | 2006-01-25 | Volvo Construction Equipment Holding Sweden AB | Variable regeneration valve of heavy equipment |
| CN202348806U (en) * | 2011-12-07 | 2012-07-25 | 燕山大学 | proportional cartridge valve with variable flow gain |
| CN204061394U (en) * | 2014-09-06 | 2014-12-31 | 蚌埠液力机械有限公司 | Variable displacement control valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678107A (en) * | 2017-01-19 | 2017-05-17 | 宁波江北宇洲液压设备厂 | Speed limiting valve special for forklift truck |
| CN106678107B (en) * | 2017-01-19 | 2018-01-09 | 宁波江北宇洲液压设备厂 | A kind of special governor valve of fork truck |
| CN108505969A (en) * | 2018-04-18 | 2018-09-07 | 盐城庆隆机械有限公司 | A kind of time-delay valve |
| CN108505969B (en) * | 2018-04-18 | 2024-02-27 | 盐城庆隆机械有限公司 | Time delay valve |
| CN110219848A (en) * | 2019-07-27 | 2019-09-10 | 蚌埠液力机械有限公司 | Integrated form variable control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104196802B (en) | 2016-08-17 |
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