CN203594845U - Back-pressure valve - Google Patents
Back-pressure valve Download PDFInfo
- Publication number
- CN203594845U CN203594845U CN201320626368.XU CN201320626368U CN203594845U CN 203594845 U CN203594845 U CN 203594845U CN 201320626368 U CN201320626368 U CN 201320626368U CN 203594845 U CN203594845 U CN 203594845U
- Authority
- CN
- China
- Prior art keywords
- pressure valve
- upper plug
- pressure
- plug head
- arranges
- 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 - Fee Related
Links
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 230000009466 transformation Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model discloses a back-pressure valve, which comprises a back-pressure valve barrel body, wherein the upper and lower end of the back-pressure valve barrel body are respectively provided with an upper plug and a lower plug, a back-pressure valve piston body is arranged in the back-pressure valve barrel body, the side surface of the upper plug is provided with a fluid inlet communicated with an inner cavity of the barrel body, the central part of the upper plug is provided with a valve core with an overflow hole, and a pressure-variable adjusting hole which exerts a pressure force on the lower end of the back-pressure valve piston body by injecting a fluid is arranged in the lower plug. The back-pressure valve is reasonable in structure, can effectively keep the fluid pressure in pipelines, and has excellent working performance.
Description
Technical field
The utility model relates to the back-pressure valve that the industries such as a kind of oil keep pipeline hydrodynamic pressure.
Background technique
The industry pipeline fluid pressure such as existing oil, in the flow process of whole pipeline, are difficult for keeping pressure, need to be improved.
Summary of the invention
It is a kind of rational in infrastructure that the purpose of this utility model is to provide, and can effectively keep the back-pressure valve of pipeline hydrodynamic pressure.
Technical solution of the present utility model is:
A kind of back-pressure valve, it is characterized in that: comprise back-pressure valve cylindrical shell, the upper and lower end of back-pressure valve cylindrical shell arranges respectively upper plug head, lower end cap, back-pressure valve piston body is set in back-pressure valve cylindrical shell, the side of upper plug head arranges the fluid inlet communicating with cylinder lumen, upper plug head central position arranges the spool in carry potential overflow hole, in lower end cap, arranges by the transformation adjustment hole that adds fluid to exert pressure to back-pressure valve piston body lower end.
The upper end of back-pressure valve piston body arranges pyramidal projections, and pyramidal projections coordinates with overflow hole.
Between upper plug head, lower end cap, back-pressure valve piston body and back-pressure valve cylindrical shell, sealing gasket is all set; O RunddichtringO is set between spool and upper plug head.
Fluid inlet in upper plug head is broken line form.
Described broken line is two sections of forms that straight line joins with angle, and angle is 99 °.
The utility model is rational in infrastructure, can effectively keep pipeline hydrodynamic pressure, service behaviour excellence.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is an embodiment's of the utility model structural representation.
Embodiment
A kind of back-pressure valve, comprise back-pressure valve cylindrical shell 1, the upper and lower end of back-pressure valve cylindrical shell arranges respectively upper plug head 2, lower end cap 3, back-pressure valve piston body 4 is set in back-pressure valve cylindrical shell, the side of upper plug head arranges the fluid inlet 5 communicating with cylinder lumen, upper plug head central position arranges the spool 6 in carry potential overflow hole 7, in lower end cap, arrange by the transformation adjustment hole 8 that adds fluid to exert pressure to back-pressure valve piston body lower end, in transformation adjustment hole, the pressure size of input fluid can regulate from the pressure of overflow hole effluent fluid.
The upper end of back-pressure valve piston body arranges pyramidal projections 9, and pyramidal projections coordinates with overflow hole, and in the time entering from fluid inlet without fluid, pyramidal projections is sealed overflow hole.
Between upper plug head, lower end cap, back-pressure valve piston body and back-pressure valve cylindrical shell, sealing gasket 10 is all set; O RunddichtringO 11 is set between spool and upper plug head.
Fluid inlet in upper plug head is broken line form.Described broken line is two sections of forms that straight line joins with angle, and angle α is 99 °, and such broken line form and the angle number of degrees can effectively guarantee specific hydrodynamic pressure.
Claims (5)
1. a back-pressure valve, it is characterized in that: comprise back-pressure valve cylindrical shell, the upper and lower end of back-pressure valve cylindrical shell arranges respectively upper plug head, lower end cap, back-pressure valve piston body is set in back-pressure valve cylindrical shell, the side of upper plug head arranges the fluid inlet communicating with cylinder lumen, upper plug head central position arranges the spool in carry potential overflow hole, in lower end cap, arranges by the transformation adjustment hole that adds fluid to exert pressure to back-pressure valve piston body lower end.
2. back-pressure valve according to claim 1, is characterized in that: the upper end of back-pressure valve piston body arranges pyramidal projections, and pyramidal projections coordinates with overflow hole.
3. back-pressure valve according to claim 1 and 2, is characterized in that: between upper plug head, lower end cap, back-pressure valve piston body and back-pressure valve cylindrical shell, sealing gasket is all set; O RunddichtringO is set between spool and upper plug head.
4. back-pressure valve according to claim 1 and 2, is characterized in that: the fluid inlet in upper plug head is broken line form.
5. back-pressure valve according to claim 4, is characterized in that: described broken line is two sections of forms that straight line joins with angle, and angle is 99 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626368.XU CN203594845U (en) | 2013-10-12 | 2013-10-12 | Back-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626368.XU CN203594845U (en) | 2013-10-12 | 2013-10-12 | Back-pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594845U true CN203594845U (en) | 2014-05-14 |
Family
ID=50675736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320626368.XU Expired - Fee Related CN203594845U (en) | 2013-10-12 | 2013-10-12 | Back-pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594845U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107253A (en) * | 2018-01-30 | 2019-08-09 | 中国石油化工股份有限公司 | Back-pressure valve for high temperature and pressure rock core flowing experiment |
| CN110260006A (en) * | 2019-05-24 | 2019-09-20 | 南通市中京机械有限公司 | A kind of back-pressure valve |
| 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 |
-
2013
- 2013-10-12 CN CN201320626368.XU patent/CN203594845U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107253A (en) * | 2018-01-30 | 2019-08-09 | 中国石油化工股份有限公司 | Back-pressure valve for high temperature and pressure rock core flowing experiment |
| CN110260006A (en) * | 2019-05-24 | 2019-09-20 | 南通市中京机械有限公司 | A kind of back-pressure valve |
| 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 |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20161012 |