CN203594845U - Back-pressure valve - Google Patents

Back-pressure valve Download PDF

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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
pressure
plug head
arranges
cylindrical shell
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
Application number
CN201320626368.XU
Other languages
Chinese (zh)
Inventor
王�华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANTONG ZHONGJING MECHANICAL Co Ltd
Original Assignee
NANTONG ZHONGJING MECHANICAL Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NANTONG ZHONGJING MECHANICAL Co Ltd filed Critical NANTONG ZHONGJING MECHANICAL Co Ltd
Priority to CN201320626368.XU priority Critical patent/CN203594845U/en
Application granted granted Critical
Publication of CN203594845U publication Critical patent/CN203594845U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Back-pressure valve
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 °.
CN201320626368.XU 2013-10-12 2013-10-12 Back-pressure valve Expired - Fee Related CN203594845U (en)

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 (2)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

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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