CN87202793U - Liquid-control one-way valve - Google Patents
Liquid-control one-way valve Download PDFInfo
- Publication number
- CN87202793U CN87202793U CN 87202793 CN87202793U CN87202793U CN 87202793 U CN87202793 U CN 87202793U CN 87202793 CN87202793 CN 87202793 CN 87202793 U CN87202793 U CN 87202793U CN 87202793 U CN87202793 U CN 87202793U
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- CN
- China
- Prior art keywords
- valve
- liquid
- control
- cover
- hydraulic
- 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 - Lifetime
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- Check Valves (AREA)
Abstract
The utility model relates to a liquid-control one-way valve, which is suitable for the control device of the coal mine hydraulic pressure support equipment; a first stage sealing pair is formed by an O-shaped sealing ring arranged on a valve core and a valve hole; during work, the O-shaped sealing ring does not pass the flowing hole of the hydraulic fluid, and is not broken; a second stage valve is matched by a rubber valve pad and the valve end face; the liquid-control one-way valve has the advantages of simple structure, no attack during unloading, stable working, strong anti-pollution ability, high working pressure, big flow quantity, adapting high pump pressure and longtime and reliable working; the liquid-control one-way valve is suitable for the coal mine hydraulic support, the face-end support, the top-cutting prop, the hydraulic press and the hydraulic control device using emulsion as the working media in the experiment.
Description
The utility model relates to a kind of Pilot operated check valve, and being used for the hydraulic pressure of the colliery support apparatus is the control gear of working medium with the emulsified liquid.
Existing Pilot operated check valve as the Pilot operated check valve of West Germany He Muxiate company, produces hydraulic shock during the unloading of the Pilot operated check valve of Mitsui three pond companies, and it is not steady to work, responsive to the impurity in the working medium.Though homemade KDF1 type Pilot operated check valve contamination resistance is strong, operating pressure is low, and the life-span is short.The Pilot operated check valve of homemade KDF2 type Pilot operated check valve, Britain Jia Like company (see publish the Coal Industry Press " hydraulic support " the 67th page) operating pressure height, solved the hydraulic shock problem, but responsive to the impurity in the working medium, the life-span is short, and functional reliability is poor.And all these valve flows are all less.
The purpose of this utility model provides a kind of simple in structure, the pressure height, and flow is big, adapts to the pump pressure height, the unloading Pilot operated check valve that steadily nothing is impacted, contamination resistance is strong and the reliable operation life-span is long.
The utility model is made up of bar cover (1), valve body (2), push rod (3), cover for seat (4), spool (5), valve pad (6), O-ring seals (7), valve (8), spring (9) and end cover major parts such as (10).Spool (5) is joined together with the O-ring seals on it (7) and valve (8) axial bore internal surface and is paid.Form O-ring seals (7) outer surface and cross the structure of valve (8) radial hole D inner end, O-ring seals during unloading (7) is done contrary flow of pressurized via hole, can not damage; Second step valve is joined with flat rubber valve pad (6) and valve (8) end face and is paid, bar cover (1), cover for seat (4) and end cover (10) are housed in the fluid-control one-way valve body (2), the seal ring sealing is radially all arranged, and bar cover (1), end cover (10) are contained in the two ends of valve body (2) respectively by being threaded.
Advantage of the present utility model has been to adopt the strong rubber parts of contamination resistance to constitute two-stage valve and has paid, and has High Voltage again, big flow, advantage such as the reliable operation life-span is long under the high pump pressure.
Accompanying drawing is the sectional view of Pilot operated check valve locked position of coupler.
The utility model embodiment: when B confession high-pressure spray, because valve (8) diameter is big, it is big to cross the liquid cross section, spring reset power is big, spool (5) can only move by same valve (8) together with the O-ring seals on it (7), O-ring seals (7) can not crossed the radial hole D on the valve (8), thereby avoided O-ring seals to clamp-on aperture D when the hydraulic fluid flow path direction via hole and scratched, the C mouth is unloaded and is controlled hydraulic pressure when carrying during unloading, push rod (3) promotes spool (5), makes O-ring seals (7) do contrary hydraulic fluid and flows through the hole.O-ring seals can not filled in aperture D and therefore can not destroy, the beginning release; After push rod (3) is run into valve (8),, push up not open simultaneously, can not form high-pressure high-flow and impact the push rod back seat, also just can not produce hydraulic shock because of valve (8) diameter is big.After through the D hole A mouth pressure being dropped to very low value, valve (8) is just backed down, and forms second level unloading.Because valve pad (6) always is in the state of being crushed to death before the unloading of the second level, can not destroy.And,, also lost damage capability because of second level unloading pressure is low to having the breakdown action of destruction.This is that the utility model guarantees that flat rubber valve pad (6) is in the high non-destructive key of pressure level work.And first order unloading because O-ring seals (7) is in contrary hydraulic fluid stream mode via hole, can not destroy yet.
Two-stage valve is all joined with rubber parts and paid, and is insensitive to the impurity in the medium.Contamination resistance of the present utility model and functional reliability have been improved.
Only resetting with a spring of a utility model secondary valve and a push rod (3) avoided the obstruction of push rod spring to liquid stream.Satisfied the requirement of big flow.Push rod (3) diameter at smaller end directly reaches 10mm, and strength coefficient is big.
Claims (2)
1, a kind of by the bar cover, valve body, push rod, cover for seat, spool, valve pad, ○Xing Mifengquan, valve, the Pilot operated check valve that major parts such as spring and end cover are formed, it is characterized in that push rod (3), the shared spring reset of spool (5) and valve (8), two-stage valve is all joined with rubber parts and is paid, join together with the ○Xing Mifengquan on it (7) and valve (8) internal surface of hole by spool (5) and to pay, form the ○Xing Mifengquan outer surface and cross the structure of radial hole D inner end, and the second level is joined with flat rubber valve pad (6) and valve (8) end face and is paid, bar cover (1) is housed in the valve body (2), cover for seat (4), with end cover (10), the seal ring sealing is radially all arranged, bar cover (1), end cover (10) is contained in the two ends of valve body (2) respectively by being threaded.
2, it is characterized in that according to the described a kind of Pilot operated check valve of claim 1 the push rod diameter at smaller end directly reaches 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87202793 CN87202793U (en) | 1987-03-09 | 1987-03-09 | Liquid-control one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87202793 CN87202793U (en) | 1987-03-09 | 1987-03-09 | Liquid-control one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87202793U true CN87202793U (en) | 1988-11-02 |
Family
ID=4818872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87202793 Expired - Lifetime CN87202793U (en) | 1987-03-09 | 1987-03-09 | Liquid-control one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87202793U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392773B (en) * | 2007-09-20 | 2013-07-10 | 沃尔沃建造设备控股（瑞典）有限公司 | Double check valve having floating function |
| CN103498825A (en) * | 2013-10-12 | 2014-01-08 | 上海新跃仪表厂 | Zero leakage inserting installation hydraulic control one-way valve |
| CN103807244A (en) * | 2014-01-22 | 2014-05-21 | 马鞍山市裕华机械制造有限公司 | Plug-in mounting type oil supplementing valve controlled by ejector rod |
| CN104088827A (en) * | 2014-07-17 | 2014-10-08 | 常州爱普超高压液压系统有限公司 | Hydraulic overturning device for pontoon bridge gangplank |
-
1987
- 1987-03-09 CN CN 87202793 patent/CN87202793U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392773B (en) * | 2007-09-20 | 2013-07-10 | 沃尔沃建造设备控股（瑞典）有限公司 | Double check valve having floating function |
| CN103498825A (en) * | 2013-10-12 | 2014-01-08 | 上海新跃仪表厂 | Zero leakage inserting installation hydraulic control one-way valve |
| CN103498825B (en) * | 2013-10-12 | 2016-01-06 | 上海新跃仪表厂 | Zero leakage plug-in type pilot controlled check valve |
| CN103807244A (en) * | 2014-01-22 | 2014-05-21 | 马鞍山市裕华机械制造有限公司 | Plug-in mounting type oil supplementing valve controlled by ejector rod |
| CN103807244B (en) * | 2014-01-22 | 2015-10-28 | 马鞍山市裕华机械制造有限公司 | Push rod controls plug-in type Fill valve |
| CN104088827A (en) * | 2014-07-17 | 2014-10-08 | 常州爱普超高压液压系统有限公司 | Hydraulic overturning device for pontoon bridge gangplank |
| CN104088827B (en) * | 2014-07-17 | 2016-04-06 | 靖江市维益知识产权服务有限公司 | Bridge of boats springboard hydraulic pressure turn-over device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |