CN110260006A - A kind of back-pressure valve - Google Patents
A kind of back-pressure valve Download PDFInfo
- Publication number
- CN110260006A CN110260006A CN201910437753.1A CN201910437753A CN110260006A CN 110260006 A CN110260006 A CN 110260006A CN 201910437753 A CN201910437753 A CN 201910437753A CN 110260006 A CN110260006 A CN 110260006A
- Authority
- CN
- China
- Prior art keywords
- pressure valve
- piston body
- valve piston
- cylinder
- plug head
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/26—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in either direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a kind of back-pressure valves, including back-pressure valve cylinder, upper plug head, lower end cap is respectively set in the upper and lower side of back-pressure valve cylinder, back-pressure valve piston body is set in back-pressure valve cylinder, the fluid inlet communicated with cylinder lumen is arranged in the side of upper plug head, the spool in carry potential overflow hole is arranged in upper plug head central part, and setting applies stressed transformation adjustment hole to back-pressure valve piston body lower end by the way that fluid is added in lower end cap；Back-pressure valve piston body is internal cavity form, and cavity bottom is communicated with back-pressure valve cylinder lumen, on back-pressure valve piston body, upper and lower two gaskets are set on back-pressure valve piston body and back-pressure valve cylinder contact surface, the through hole communicated with piston body internal cavity is set between upper and lower two gaskets on back-pressure valve piston body.Structure of the invention is reasonable, good operation stability, and working performance is excellent.
Description
Technical field
The present invention relates to the back-pressure valves that a kind of industries such as petroleum keep conduit fluid pressure.
Background technique
The industries conduit fluid pressure such as existing petroleum is not easy to keep pressure in the process of entire pipeline, needs to be subject to
It improves.Chinese patent CN203594845 U discloses a kind of back-pressure valve, overcomes the segmental defect of the prior art, but piston
Kinetic stability is bad, needs further to be improved.
Summary of the invention
Invention is designed to provide a kind of structurally reasonable, back-pressure valve of good operation stability.
The technical solution of the invention is as follows:
Upper plug head, lower end cap, back-pressure valve is respectively set in a kind of back-pressure valve, including back-pressure valve cylinder, the upper and lower side of back-pressure valve cylinder
Back-pressure valve piston body is set in cylinder, and the fluid inlet communicated with cylinder lumen, upper plug head central portion is arranged in the side of upper plug head
The spool in position setting carry potential overflow hole, setting applies stressed change to back-pressure valve piston body lower end by the way that fluid is added in lower end cap
Press adjustment hole；It is characterized in that: back-pressure valve piston body is internal cavity form, and cavity bottom is communicated with back-pressure valve cylinder lumen, is returned
On pressure valve piston body, upper and lower two gaskets are set, in back pressure valve piston on back-pressure valve piston body and back-pressure valve cylinder contact surface
The through hole communicated with piston body internal cavity is set between upper and lower two gaskets on body.
Back-pressure valve piston body is individual layers form.
Structure of the invention is reasonable, good operation stability, and working performance is excellent.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of one embodiment of the invention.
Specific embodiment
Back-pressure valve piston body is 12 form of internal cavity, and cavity bottom is communicated with back-pressure valve cylinder lumen, back pressure valve piston
On body, upper and lower two gaskets are set, on back-pressure valve piston body on back-pressure valve piston body and back-pressure valve cylinder contact surface
The through hole 13 communicated with piston body internal cavity is set between upper and lower two gaskets.Back-pressure valve piston body is individual layers form.
Remaining structure can use form identical with Chinese patent CN203594845 U, specifically include:
Upper plug head 2, lower end cap 3, back pressure is respectively set in a kind of back-pressure valve, including back-pressure valve cylinder 1, the upper and lower side of back-pressure valve cylinder
Back-pressure valve piston body 4 is set in valve cylinder body, and the side of upper plug head is arranged the fluid inlet 5 communicated with cylinder lumen, in upper plug head
The spool 6 in position setting carry potential overflow hole 7 is entreated, setting is applied to back-pressure valve piston body lower end by addition fluid and pressed in lower end cap
The transformation adjustment hole 8 of power inputs the adjustable pressure from overflow hole outflow fluid of pressure size of fluid in transformation adjustment hole
Power.
Pyramidal projections 9 are arranged in the upper end of back-pressure valve piston body, and pyramidal projections and overflow hole cooperate, no fluid from fluid into
When mouth enters, pyramidal projections close overflow hole.
Gasket 10 is respectively provided between upper plug head, lower end cap, back-pressure valve piston body and back-pressure valve cylinder；Spool and upper plug head
Between be arranged O-ring seal 11.
Fluid inlet in upper plug head is in broken line form.The broken line is the form that two sections of straight lines are connected with angle, angle α
It is 99 °, specific Fluid pressure can be effectively ensured in such broken line form and angle degree.
Claims (2)
1. upper plug head, lower end cap, back pressure is respectively set in a kind of back-pressure valve, including back-pressure valve cylinder, the upper and lower side of back-pressure valve cylinder
Back-pressure valve piston body is set in valve cylinder body, and the fluid inlet communicated with cylinder lumen, upper plug head center is arranged in the side of upper plug head
The spool in carry potential overflow hole is arranged in position, and setting is applied by addition fluid to back-pressure valve piston body lower end stressed in lower end cap
Transformation adjustment hole；It is characterized in that: back-pressure valve piston body is internal cavity form, and cavity bottom is communicated with back-pressure valve cylinder lumen,
On back-pressure valve piston body, upper and lower two gaskets are set on back-pressure valve piston body and back-pressure valve cylinder contact surface, it is living in back-pressure valve
The through hole communicated with piston body internal cavity is set between upper and lower two gaskets on cock body.
2. a kind of back-pressure valve according to claim 1, it is characterized in that: back-pressure valve piston body is individual layers form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910437753.1A CN110260006A (en) | 2019-05-24 | 2019-05-24 | A kind of back-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910437753.1A CN110260006A (en) | 2019-05-24 | 2019-05-24 | A kind of back-pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110260006A true CN110260006A (en) | 2019-09-20 |
Family
ID=67915295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910437753.1A Pending CN110260006A (en) | 2019-05-24 | 2019-05-24 | A kind of back-pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110260006A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965085A (en) * | 2020-06-30 | 2020-11-20 | 南通市中京机械有限公司 | Back pressure device for rock core detection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2519781A1 (en) * | 1982-01-13 | 1983-07-18 | Lucas Ind Plc | IMPROVEMENTS TO REGULATORS FOR FLOWING A FLUID |
| CN2136894Y (en) * | 1992-02-18 | 1993-06-23 | 国营九二五厂 | Pressure lubricating piston pair |
| CN2913752Y (en) * | 2006-05-26 | 2007-06-20 | 中国石化股份胜利油田分公司地质科学研究院 | Piston type back pressure valve |
| CN103016443A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air suspension friction-free air cylinder provided with pressure relief groove |
| CN203594845U (en) * | 2013-10-12 | 2014-05-14 | 南通市中京机械有限公司 | Back-pressure valve |
-
2019
- 2019-05-24 CN CN201910437753.1A patent/CN110260006A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2519781A1 (en) * | 1982-01-13 | 1983-07-18 | Lucas Ind Plc | IMPROVEMENTS TO REGULATORS FOR FLOWING A FLUID |
| CN2136894Y (en) * | 1992-02-18 | 1993-06-23 | 国营九二五厂 | Pressure lubricating piston pair |
| CN2913752Y (en) * | 2006-05-26 | 2007-06-20 | 中国石化股份胜利油田分公司地质科学研究院 | Piston type back pressure valve |
| CN103016443A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air suspension friction-free air cylinder provided with pressure relief groove |
| CN203594845U (en) * | 2013-10-12 | 2014-05-14 | 南通市中京机械有限公司 | Back-pressure valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965085A (en) * | 2020-06-30 | 2020-11-20 | 南通市中京机械有限公司 | Back pressure device for rock core detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190920 |
|
| RJ01 | Rejection of invention patent application after publication |