CN103195946A - Pilot valve - Google Patents
Pilot valve Download PDFInfo
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- CN103195946A CN103195946A CN2013100670795A CN201310067079A CN103195946A CN 103195946 A CN103195946 A CN 103195946A CN 2013100670795 A CN2013100670795 A CN 2013100670795A CN 201310067079 A CN201310067079 A CN 201310067079A CN 103195946 A CN103195946 A CN 103195946A
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- valve
- hydraulic fluid
- fluid port
- oil
- valve pocket
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Abstract
A pilot valve comprises valve bodies, valve sleeves, a valve rod, a spring and a plug, wherein the one end of the valve rod is positioned outside each of the valve bodies, and the other end of the valve rod is sleeved in the valve sleeves; one end of the spring is propped against the valve rod, and the other end of the spring is propped against the valve bodies; the valve sleeves and the plug are arranged in the valve bodies; the plug is propped against one ends, which are far away from the spring, of the valve sleeves; an oil inlet, an oil outlet and an oil return port are formed on the valve sleeves; oil passages communicated with the oil inlet, the oil outlet and the oil return port are arranged on the valve bodies respectively; a first liquid cavity and a second liquid cavity are arranged on the valve rod; a first oil port and a second oil port which are communicated with the first liquid cavity as well as a third oil port and a fourth oil port which are communicated with the second liquid cavity are arranged on the valve rod; the first oil port and the second oil port correspond to the oil inlet, the third oil port corresponds to the oil return port, and the fourth oil port corresponds to the oil outlet. The pilot valve has good sealing performance and low requirements for hydraulic medium.
Description
Technical field
The present invention relates to a kind of valve, specifically relate to a kind of pilot valve.
Background technique
Pilot valve is the Auxiliary valves that uses for the operation of controlling other valves or element, and the pilot valve that is usually used in small flow is controlled the occasion of the main control valve of big flow.What have pilot valve now generally is the opening and closing that realize pilot valve by steel ball and conical valve seat, for the requirement on machining accuracy of surface of contact than higher, if machining accuracy does not reach requirement, can cause hydraulic medium to leak via the surface of contact of steel ball and valve seat, cause sealability bad and influence the proper functioning of pilot valve; The pilot valve bore dia that steel ball and conical valve seat constituted when pilot valve was opened simultaneously is very little, generally has only 2～3mm, hydraulic medium is through guide's valve opening when work, turbidity test to hydraulic medium have very high requirement, contaminated hydraulic medium or the hydraulic medium that does not reach requirement enter easy obstruction guide valve opening, thereby make the pilot valve cisco unity malfunction.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of good seal performance and to the low pilot valve that requires of hydraulic medium.
Technical solution of the present invention is, a kind of pilot valve with following structure is provided, it comprises valve body, valve pocket, valve rod, spring and screw plug, described valve rod one end is positioned at outside the valve body, the described valve rod the other end is socketed in the valve pocket, and described spring one end is against on the valve rod, and the spring the other end is against on the valve body, described valve pocket and screw plug all are located in the valve body, and described screw plug is against valve pocket away from an end of spring; Described valve pocket is provided with filler opening, oil outlet and return opening, be respectively equipped with the oil circuit that is communicated with filler opening, oil outlet and return opening on the described valve body, described valve rod is provided with first sap cavity and second sap cavity, described valve rod is provided with first hydraulic fluid port and second hydraulic fluid port, the 3rd hydraulic fluid port that is communicated with second sap cavity and the 4th hydraulic fluid port that is communicated with first sap cavity, the corresponding filler opening of described first hydraulic fluid port and second hydraulic fluid port, the corresponding return opening of described the 3rd hydraulic fluid port, the corresponding oil outlet of described the 4th hydraulic fluid port.
After adopting above structure, pilot valve of the present invention compared with prior art has the following advantages:
Pilot valve of the present invention is not when valve rod moves, and oil outlet is communicated with the back oil return with return opening via the 3rd hydraulic fluid port, second sap cavity, the 4th hydraulic fluid port; After the valve rod action, oil outlet is not communicated with return opening, and first hydraulic fluid port is communicated with oil outlet, and hydraulic medium enters main control valve valve control mouth via the passage on filler opening, second hydraulic fluid port, first sap cavity, first hydraulic fluid port, oil outlet and the valve body successively, make the main control valve action, reach the purpose of control main control valve.Because pilot valve of the present invention do not adopt traditional steel ball and valve seat cone structure, the situation of leakage appears owing to precision is not high when being not easy valve rod to occur and contact with the valve seat conical surface, and sealability is better; Also be not easy to occur impurity and stop up the phenomenon of guide's valve opening, to hydraulic medium require low.
As preferably, separate through the soldering welding block between described first sap cavity and second sap cavity.Add to reach by soldering welding block in the cavity in valve rod man-hour and be separated out first sap cavity and second sap cavity.
As improvement, described valve pocket is made of first valve pocket, second valve pocket, the 3rd valve pocket and the 4th valve pocket, and described screw plug is against the 4th valve pocket outer side surface; Described filler opening, oil outlet and return opening are located at respectively on second valve pocket, the 3rd valve pocket and the 4th valve pocket.Valve pocket is divided into four parts to be processed and installs more convenient.
As improvement, described being positioned on the outer valve rod of screw plug is socketed with dust ring.Prevent that dust and impurity from entering in the valve body, thereby prolong the working life of pilot valve, especially for the pilot valve that uses under the operating mode more than the inferior dust impurity of coal mine, the effect of dust ring is more obvious.
As improvement, the diameter of described first hydraulic fluid port, second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port is 3～8mm.Pilot valve generally is installed on other valve piece, if the pilot valve volume increases too many, a plurality of pilot valves can occur and can not install, the diameter of preferred first hydraulic fluid port, second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port is that 3～8mm can guarantee that when playing respective action the total volume of pilot valve is unlikely to increase too much, thereby makes things convenient for the installation of pilot valve.
Description of drawings
Shown in Figure 1 is the structural representation of pilot valve of the present invention.
Shown in the figure: 1, valve body, 2, valve pocket, 2.1, first valve pocket, 2.2, second valve pocket, 2.3, the 3rd valve pocket, the 2.4, the 4th valve pocket, 2.5, filler opening, 2.6, oil outlet, 2.7, return opening, 3, valve rod, 3.1, first sap cavity, 3.2, second sap cavity, 3.3, first hydraulic fluid port, 3.4, second hydraulic fluid port, 3.5, the 3rd hydraulic fluid port, the 3.6, the 4th hydraulic fluid port, 4, spring, 5, screw plug, 6, welding block, 7, dust ring.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
See also shown in Figure 1, pilot valve of the present invention, it comprises valve body 1, valve pocket 2, valve rod 3, spring 4 and screw plug 5, described valve rod 3 one ends are positioned at outside the valve body 1, described valve rod 3 the other ends are socketed in the valve pocket 2, and described spring 4 one ends are against on the valve rod 3, and spring 4 the other ends are against on the valve body 1, described valve pocket 2 and screw plug 5 all are located in the valve body 1, and described screw plug 5 is against valve pocket 2 away from an end of spring 4; Described valve pocket 2 is provided with filler opening 2.5, oil outlet 2.6 and return opening 2.7, be respectively equipped with and filler opening 2.5 on the described valve body 1, the oil circuit that oil outlet 2.6 and return opening 2.7 are communicated with, described valve rod 3 is provided with first sap cavity 3.1 and second sap cavity 3.2, described valve rod 3 is provided with first hydraulic fluid port 3.3 and second hydraulic fluid port 3.4 that is communicated with first sap cavity 3.1, the 3rd hydraulic fluid port 3.5 that is communicated with second sap cavity 3.2 and the 4th hydraulic fluid port 3.6, described first hydraulic fluid port 3.3 and second hydraulic fluid port, 3.4 corresponding filler openings 2.5, described the 3rd hydraulic fluid port 3.5 corresponding return openings 2.7, described the 4th hydraulic fluid port 3.6 corresponding oil outlets 2.6.
Separate through soldering welding block 6 between described first sap cavity 3.1 and second sap cavity 3.2.
Described valve pocket 2 is made of first valve pocket 2.1, second valve pocket 2.2, the 3rd valve pocket 2.3 and the 4th valve pocket 2.4, and described screw plug 5 is against the 4th valve pocket 2.4 outer side surfaces; Described filler opening 2.5, oil outlet 2.6 and return opening 2.7 are located at respectively on second valve pocket 2.2, the 3rd valve pocket 2.3 and the 4th valve pocket 2.4.
Be socketed with dust ring 7 on the described valve rod 3 that is positioned at outside the screw plug 5.
The diameter of described first hydraulic fluid port 3.3, second hydraulic fluid port 3.4, the 3rd hydraulic fluid port 3.5 and the 4th hydraulic fluid port 3.6 is 3～8mm.
Working principle: valve rod 3 is moved to left by manual or alternate manner, oil outlet 2.6 is communicated with first hydraulic fluid port 3.3, hydraulic medium enters the valve control mouth of main control valve successively via the passage on filler opening 2.5, second hydraulic fluid port 3.4, first sap cavity 3.1, first hydraulic fluid port 3.3, oil outlet 2.6, the valve body 1, make the main control valve action, reach the purpose of control main control valve.
Claims (5)
1. pilot valve, it comprises valve body (1), valve pocket (2), valve rod (3), spring (4) and screw plug (5), described valve rod (3) one ends are positioned at outside the valve body (1), described valve rod (3) the other end is socketed in the valve pocket (2), described spring (4) one ends are against on the valve rod (3), spring (4) the other end is against on the valve body (1), and described valve pocket (2) and screw plug (5) all are located in the valve body (1), and described screw plug (5) is against valve pocket (2) away from an end of spring (4); Described valve pocket (2) is provided with filler opening (2.5), oil outlet (2.6) and return opening (2.7), be respectively equipped with on the described valve body (1) and filler opening (2.5), the oil circuit that oil outlet (2.6) and return opening (2.7) are communicated with, it is characterized in that: described valve rod (3) is provided with first sap cavity (3.1) and second sap cavity (3.2), described valve rod (3) is provided with first hydraulic fluid port (3.3) and second hydraulic fluid port (3.4) that is communicated with first sap cavity (3.1), the 3rd hydraulic fluid port (3.5) that is communicated with second sap cavity (3.2) and the 4th hydraulic fluid port (3.6), described first hydraulic fluid port (3.3) and the corresponding filler opening of second hydraulic fluid port (3.4) (2.5), the corresponding return opening of described the 3rd hydraulic fluid port (3.5) (2.7), the corresponding oil outlet of described the 4th hydraulic fluid port (3.6) (2.6).
2. pilot valve according to claim 1 is characterized in that: separate through soldering welding block (6) between described first sap cavity (3.1) and second sap cavity (3.2).
3. pilot valve according to claim 1 is characterized in that: described valve pocket (2) is made of first valve pocket (2.1), second valve pocket (2.2), the 3rd valve pocket (2.3) and the 4th valve pocket (2.4), and described screw plug (5) is against the 4th valve pocket (2.4) outer side surface; Described filler opening (2.5), oil outlet (2.6) and return opening (2.7) are located at respectively on second valve pocket (2.2), the 3rd valve pocket (2.3) and the 4th valve pocket (2.4).
4. pilot valve according to claim 3 is characterized in that: be socketed with dust ring (7) on the described valve rod (3) that is positioned at outside the screw plug (5).
5. pilot valve according to claim 1, it is characterized in that: the diameter of described first hydraulic fluid port (3.3), second hydraulic fluid port (3.4), the 3rd hydraulic fluid port (3.5) and the 4th hydraulic fluid port (3.6) is 3～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310067079.5A CN103195946B (en) | 2013-03-04 | 2013-03-04 | Pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310067079.5A CN103195946B (en) | 2013-03-04 | 2013-03-04 | Pilot valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195946A true CN103195946A (en) | 2013-07-10 |
| CN103195946B CN103195946B (en) | 2014-12-17 |
Family
ID=48718675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310067079.5A Active CN103195946B (en) | 2013-03-04 | 2013-03-04 | Pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103195946B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317773A (en) * | 2015-11-04 | 2016-02-10 | 宁波长壁流体动力科技有限公司 | Improved type manual pilot valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5286531A (en) * | 1976-01-13 | 1977-07-19 | Nishina Kogyo Kk | Oil pressure pilot type switch valve |
| JPS5368437A (en) * | 1976-11-30 | 1978-06-17 | Kayaba Industry Co Ltd | Dumping device for pilot changing over valve |
| EP1197692A1 (en) * | 2000-10-13 | 2002-04-17 | HydraForce, Inc. | Proportional pilot-operated directional valve |
| CN201795090U (en) * | 2010-07-16 | 2011-04-13 | 郑锋 | Metal-sealed electromagnetic pneumatic control valve |
| CN102782379A (en) * | 2010-03-03 | 2012-11-14 | 伊格尔工业股份有限公司 | Solenoid valve |
| CN203067840U (en) * | 2013-03-04 | 2013-07-17 | 宁波长壁流体动力科技有限公司 | Pilot valve |
-
2013
- 2013-03-04 CN CN201310067079.5A patent/CN103195946B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5286531A (en) * | 1976-01-13 | 1977-07-19 | Nishina Kogyo Kk | Oil pressure pilot type switch valve |
| JPS5368437A (en) * | 1976-11-30 | 1978-06-17 | Kayaba Industry Co Ltd | Dumping device for pilot changing over valve |
| EP1197692A1 (en) * | 2000-10-13 | 2002-04-17 | HydraForce, Inc. | Proportional pilot-operated directional valve |
| CN102782379A (en) * | 2010-03-03 | 2012-11-14 | 伊格尔工业股份有限公司 | Solenoid valve |
| CN201795090U (en) * | 2010-07-16 | 2011-04-13 | 郑锋 | Metal-sealed electromagnetic pneumatic control valve |
| CN203067840U (en) * | 2013-03-04 | 2013-07-17 | 宁波长壁流体动力科技有限公司 | Pilot valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317773A (en) * | 2015-11-04 | 2016-02-10 | 宁波长壁流体动力科技有限公司 | Improved type manual pilot valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103195946B (en) | 2014-12-17 |
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