CN103470564A - Pilot-operated check valve - Google Patents
Pilot-operated check valve Download PDFInfo
- Publication number
- CN103470564A CN103470564A CN2013104295252A CN201310429525A CN103470564A CN 103470564 A CN103470564 A CN 103470564A CN 2013104295252 A CN2013104295252 A CN 2013104295252A CN 201310429525 A CN201310429525 A CN 201310429525A CN 103470564 A CN103470564 A CN 103470564A
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- CN
- China
- Prior art keywords
- spool
- operated check
- pilot
- spring
- valve body
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- 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.)
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Abstract
The invention discloses a pilot-operated check valve, which comprises a top cap, a valve body, a spring, a spool, a valve seat, a push rod, a control piston, a bottom cap and a pilot oil port, the top cap and the bottom cap are respectively arranged on both ends of the valve body, the spring is arranged in the valve body, one end of the spring is fixedly connected with the top cap, the other end of the spring is fixedly connected with the spool, the valve seat is arranged to the left of the spool, the push rod arranged in the valve seat is fixedly connected with the control piston, and the pilot oil port is arranged to the left of the control piston. Oil can flow by pushing the spool of the pilot-operated check valve; when the oil flows in the opposite direction, the control piston is pushed to move, so that the valve port is opened, as a result, the oil reversely passes, and thereby the oil flows reversely; and the pilot-operated check valve has the advantages of sealing property, agile action, stable and reliable operation, simple structure and low manufacturing cost.
Description
Technical field
The present invention relates to a kind of Pilot operated check valve.
Background technique
In order to adapt to the execution demand of hydraulic control mechanism, the connection of position control valve or the reliability of disconnection play an important role, one-way valve only allows liquid stream to flow along a direction in hydraulic system, and can not reverse flow, its main performance requirements be liquid stream whole to by the time pressure loss little, reverse when obstructed sealing to get well, action is sensitive, but existing one-way valve structures complexity, work reliable and stable not, and manufacture cost is high.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of simple in structure, the reliable Pilot operated check valve of working stability.
Technological scheme: in order to realize above purpose, a kind of Pilot operated check valve of the present invention, it comprises: upper cover, valve body, spring, spool, valve seat, push rod, control piston, lower cover and control hydraulic fluid port, the two ends of valve body are respectively equipped with upper cover and lower cover, are provided with spring in valve body, one end and the upper cover of spring are connected, and the other end and the spool of spring are connected, and the left side of spool is provided with valve seat, the push rod and the control piston that in described valve seat, are provided with are connected, and the left side of control piston is provided with the control hydraulic fluid port.
Described control hydraulic fluid port is located in down and covers.
The two ends of described valve body are respectively equipped with entry end and outlet end.
In the middle of upper cover and valve body, place is provided with pad.
In the middle of lower cover and valve body, place is provided with pad.
Beneficial effect: a kind of Pilot operated check valve provided by the invention, by promoting spool, make fluid flow, when the fluid reverse flow, promote the movement of control piston, make valve port open, fluid oppositely passes through, and realizes the reverse flow of fluid, this Pilot operated check valve good airproof performance, and be active in one's movements, working stability is reliable, and simple in structure, low cost of manufacture.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, further illustrate the present invention.
A kind of Pilot operated check valve of the present invention, it comprises: upper cover 1, valve body 2, spring 3, spool 4, valve seat 5, push rod 6, control piston 7, lower cover 8 and control hydraulic fluid port 9.
The two ends of described valve body 2 are respectively equipped with upper cover 1 and lower cover 8, be provided with spring 3 in valve body 2, one end and the upper cover 1 of spring 3 are connected, the other end of spring 3 and spool 4 are connected, the left side of spool 4 is provided with valve seat 5, the push rod 6 and the control piston 7 that in described valve seat 5, are provided with are connected, and the left side of control piston 7 is provided with control hydraulic fluid port 9.
Described control hydraulic fluid port 9 is located on lower cover 8, and the two ends of described valve body 1 are respectively equipped with entry end 10 and outlet end 11, and in the middle of upper cover 1 and valve body 2, place is provided with pad 12, and in the middle of lower cover 8 and valve body 2, place is provided with pad 12.
When fluid during from entry end 10, hydraulic oil upwards pushes up spool 4, and it is moved up, and hydraulic oil flows to outlet end 11, when hydraulic oil fashionable from outlet end 11 reverse flow, because the conical surface golden tooth valve seat 5 of spool 4 can not pass through oily stream, now can introduce the pilot pressure oil from the control hydraulic fluid port 9 be provided with in lower cover 8, pressure oil promotes control piston 7 and moves up, push rod 6 backs down spool 4, valve port is opened, and entry end 10 and outlet end 11 are connected, and fluid oppositely passes through.
Above-described embodiment is only explanation technical conceive of the present invention and characteristics, its objective is to allow to be familiar with these those skilled in the art and can to understand content of the present invention enforcement according to this, can not limit the scope of the invention with this.All equivalents that Spirit Essence has been done according to the present invention or modification, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. a Pilot operated check valve, it is characterized in that, it comprises: upper cover (1), valve body (2), spring (3), spool (4), valve seat (5), push rod (6), control piston (7), lower cover (8) and control hydraulic fluid port (9), the two ends of described valve body (2) are respectively equipped with upper cover (1) and lower cover (8), be provided with spring (3) in valve body (2), one end of spring (3) and upper cover (1) are connected, the other end of spring (3) and spool (4) are connected, the left side of spool (4) is provided with valve seat (5), the push rod (6) be provided with in described valve seat (5) is connected with control piston (7), the left side of control piston (7) is provided with control hydraulic fluid port (9).
2. a kind of Pilot operated check valve according to claim 1, it is characterized in that: described control hydraulic fluid port (9) is located on lower cover (8).
3. a kind of Pilot operated check valve according to claim 1, it is characterized in that: the two ends of described valve body (1) are respectively equipped with entry end (10) and outlet end (11).
4. a kind of Pilot operated check valve according to claim 1, is characterized in that: locate to be provided with pad (12) in the middle of upper cover (1) and valve body (2).
5. a kind of Pilot operated check valve according to claim 1, is characterized in that: locate to be provided with pad (12) in the middle of lower cover (8) and valve body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104295252A CN103470564A (en) | 2013-09-22 | 2013-09-22 | Pilot-operated check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104295252A CN103470564A (en) | 2013-09-22 | 2013-09-22 | Pilot-operated check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103470564A true CN103470564A (en) | 2013-12-25 |
Family
ID=49795555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013104295252A Pending CN103470564A (en) | 2013-09-22 | 2013-09-22 | Pilot-operated check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103470564A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074823A (en) * | 2014-06-26 | 2014-10-01 | 无锡市威海达机械制造有限公司 | Limiting return check valve |
| CN104791317A (en) * | 2015-03-16 | 2015-07-22 | 常州市福记机械有限公司 | Hydraulic control valve and hydraulic control one-way valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3662783A (en) * | 1970-02-02 | 1972-05-16 | Parker Hannifin Corp | Spool valve assembly |
| CN2055556U (en) * | 1989-04-06 | 1990-04-04 | 沈阳液压件厂 | Hydraulic-control check valve |
| CN2222272Y (en) * | 1994-10-08 | 1996-03-13 | 李小示 | Hydraulic control one-way valve |
| CN2890536Y (en) * | 2006-04-17 | 2007-04-18 | 中煤北京煤矿机械有限责任公司 | Hydraulic controlled one-way valve |
| CN102102689A (en) * | 2011-01-30 | 2011-06-22 | 林友根 | Hydraulic one-way valve |
| CN102588376A (en) * | 2012-03-12 | 2012-07-18 | 太仓市弧螺机电有限公司 | Hydraulic control one-way valve with unloading valve core |
-
2013
- 2013-09-22 CN CN2013104295252A patent/CN103470564A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3662783A (en) * | 1970-02-02 | 1972-05-16 | Parker Hannifin Corp | Spool valve assembly |
| CN2055556U (en) * | 1989-04-06 | 1990-04-04 | 沈阳液压件厂 | Hydraulic-control check valve |
| CN2222272Y (en) * | 1994-10-08 | 1996-03-13 | 李小示 | Hydraulic control one-way valve |
| CN2890536Y (en) * | 2006-04-17 | 2007-04-18 | 中煤北京煤矿机械有限责任公司 | Hydraulic controlled one-way valve |
| CN102102689A (en) * | 2011-01-30 | 2011-06-22 | 林友根 | Hydraulic one-way valve |
| CN102588376A (en) * | 2012-03-12 | 2012-07-18 | 太仓市弧螺机电有限公司 | Hydraulic control one-way valve with unloading valve core |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074823A (en) * | 2014-06-26 | 2014-10-01 | 无锡市威海达机械制造有限公司 | Limiting return check valve |
| CN104074823B (en) * | 2014-06-26 | 2016-07-06 | 无锡市威海达机械制造有限公司 | A kind of spacing return check valve |
| CN104791317A (en) * | 2015-03-16 | 2015-07-22 | 常州市福记机械有限公司 | Hydraulic control valve and hydraulic control one-way valve |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |