CN201636400U - One-way overflow valve - Google Patents

One-way overflow valve Download PDF

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Publication number
CN201636400U
CN201636400U CN2009202976361U CN200920297636U CN201636400U CN 201636400 U CN201636400 U CN 201636400U CN 2009202976361 U CN2009202976361 U CN 2009202976361U CN 200920297636 U CN200920297636 U CN 200920297636U CN 201636400 U CN201636400 U CN 201636400U
Authority
CN
China
Prior art keywords
valve seat
main valve
sleeve
rod
opening
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
CN2009202976361U
Other languages
Chinese (zh)
Inventor
向金芳
吴越
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.)
SHANGHAI NUOMA HYDRAULIC SYSTEM CO Ltd
Original Assignee
SHANGHAI NUOMA HYDRAULIC SYSTEM 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 SHANGHAI NUOMA HYDRAULIC SYSTEM CO Ltd filed Critical SHANGHAI NUOMA HYDRAULIC SYSTEM CO Ltd
Priority to CN2009202976361U priority Critical patent/CN201636400U/en
Application granted granted Critical
Publication of CN201636400U publication Critical patent/CN201636400U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a one-way overflow valve which is characterized in that: an oil liquid inlet P is arranged at the top of a valve seat (5), an oil liquid return port T is arranged at the lateral surface of the valve seat near the top part, and an overflow port L is arranged at the lateral surface of the valve seat near the bottom part; the top of a sleeve (7) is conical and pushed at the oil inlet P of the valve seat (5); the rear part of the valve seat is connected with a main valve seat (3) in a sealing way; a through hole which is arranged at the middle part of the main valve seat (3) is communicated with the overflow port L, the rear part of the valve seat (5) is connected with the main valve seat (3) through threads, an adjusting screw rod (2) is connected to the inner side at the rear part of the main valve seat (3) through threads and fixed by a locking nut (1), a needle-shaped valve rod (6) is pushed at the head opening of the main valve seat (3), a pressure adjusting spring (4) is arranged between the adjusting screw rod (2) and the needle-shaped valve rod (6), a pipe (8) is pushed at an opening of the sleeve (7), and a through hole is arranged in the middle of the pipe. The utility model can solve the problems of adjustable structure and pressure range and opening sensitivity in the prior art.

Description

A kind of unidirectional relief valve
Technical field
The utility model belongs to the valving field, particularly relates to a kind of relief valve.
Background technique
Unidirectional relief valve belongs to pressure controlled valve, the pre compressed magnitude of pressure adjusting spring during its control input quantity, and its output quantity is the controlled pressure of import of valve.Modal purposes is that relief valve is arranged in parallel in the metering pump outlet port, as the bypass of main fluid path, forms constant hydraulic power with pump.Regulate the pre compressed magnitude of the pressure adjusting spring of unidirectional relief valve, just the maximum pressure in energy control pump outlet port.Therefore, unidirectional relief valve claimed structure compactness, oil pressure relief adjustable extent wide, open highly sensitive.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of unidirectional relief valve, to solve the problem of structure in the prior art, adjustable in pressure scope and unlatching sensitivity.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of unidirectional relief valve is provided, comprise locking nut (1), adjusting screw rod (2), main valve seat (3), pressure adjusting spring (4), valve seat (5), aciculiform valve rod (6), sleeve (7), conduit (8), described valve seat (5) top is provided with the fluid oil inlet P, the side is provided with the fluid oil return inlet T near the place, top, the side is provided with flow-off L near the place, bottom, described sleeve (7) top is taper, and withstands on the oil inlet P place of valve seat (5); Rear portion and main valve seat (3) are tightly connected; Described main valve seat (3) middle part is provided with through hole and communicates with flow-off L, described valve seat (5) rear portion is connected with main valve seat (3) by screw thread, described adjusting screw rod (2) is by being threaded in main valve seat (3) posterior medial, and it is fixing by locking nut (1), described aciculiform valve rod (6) withstands on main valve seat (3) head opening, be provided with pressure adjusting spring (4) between adjusting screw rod (2) and the aciculiform valve rod (6), described conduit (8) withstands on sleeve (7) opening, and through hole is arranged in the middle of it.
Be provided with spring between described sleeve (7) and the main valve seat (3), be provided with spring between described conduit (8) and the main valve seat (3).
Described main valve seat (3) external frame is a hierarchic structure.
Beneficial effect
The utility model compact structure, easy for installation; The oil pressure relief adjustable extent is wide; Good anti-vibration; Cracking pressure is highly sensitive.
Description of drawings
Fig. 1 is the utility model embodiment sectional drawing.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 1, a kind of unidirectional relief valve, comprise locking nut 1, adjusting screw rod 2, main valve seat 3, pressure adjusting spring 4, valve seat 5, aciculiform valve rod 6, sleeve 7, conduit 8, described valve seat 5 tops are provided with the fluid oil inlet P, the side is provided with the fluid oil return inlet T near the place, top, the side is provided with flow-off L near the place, bottom, and described sleeve 7 tops are taper, and withstand on the oil inlet P place of valve seat 5; Rear portion and main valve seat 3 are tightly connected; Described main valve seat 3 middle parts are provided with through hole and communicate with flow-off L, described valve seat 5 rear portions are connected with main valve seat 3 by screw thread, described adjusting screw rod 2 is by being threaded in main valve seat 3 posterior medials, and it is fixing by locking nut 1, described aciculiform valve rod 6 withstands on main valve seat 3 head openings, be provided with pressure adjusting spring 4 between adjusting screw rod 2 and the aciculiform valve rod 6, described conduit 8 withstands on sleeve 7 openings, and through hole is arranged in the middle of it.
Be provided with spring between described sleeve 7 and the main valve seat 3, be provided with spring between described conduit 8 and the main valve seat 3.
Described main valve seat 3 external frames are hierarchic structure.
During work, fluid enters in the cavity of sleeve 7 and main valve seat 3 formation from the through holes that oil inlet P enters conduit 8 centres again, when this part oil liquid pressure during greater than the set pressure of pressure adjusting spring 4, aciculiform valve rod 6 is backed down, fluid flows out release through the through hole at main valve seat 3 middle parts and from flow-off L, and the pressure of oil inlet P forms pressure reduction greater than sleeve 7 chamber pressures at this moment, oil liquid pressure backs down the spring between sleeve 7 and the main valve seat 3, flows out from oil return inlet T;
Use:
A. as pressure fixing valve: this is the predominant use of relief valve, and the throttle grverning hydraulic system that is combined as of quantitative hydraulic pump and relief valve provides the constant pressure liquid potential source as mentioned above.
B. as safety valve: in occasions such as positive displacement, volume throttle type speed control system and by-pass throttle speed control systems, relief valve often acts on safety valve, prevents to protect whole hydraulic system safety because failure and other reasons causes system pressure too high.
C. as back pressure valve: in the in-line throttling speed control circuit, adopt relief valve to make back pressure valve, can in the oil back chamber of executive component, produce constant backpressure, thereby can improve the stationarity of actuator movement, can prevent that oil back chamber emptying and air from infiltrating simultaneously.

Claims (3)

1. unidirectional relief valve, comprise locking nut (1), adjusting screw rod (2), main valve seat (3), pressure adjusting spring (4), valve seat (5), aciculiform valve rod (6), sleeve (7), conduit (8), it is characterized in that: described valve seat (5) top is provided with fluid filler opening (P), the side is provided with fluid return opening (T) near the place, top, the side is provided with flow-off (L) near the place, bottom, described sleeve (7) top is taper, and the filler opening (P) that withstands on valve seat (5) is located; Rear portion and main valve seat (3) are tightly connected; Described main valve seat (3) middle part is provided with through hole and communicates with flow-off (L), described valve seat (5) rear portion is connected with main valve seat (3) by screw thread, described adjusting screw rod (2) is by being threaded in main valve seat (3) posterior medial, and it is fixing by locking nut (1), described aciculiform valve rod (6) withstands on main valve seat (3) head opening, be provided with pressure adjusting spring (4) between adjusting screw rod (2) and the aciculiform valve rod (6), described conduit (8) withstands on sleeve (7) opening, and through hole is arranged in the middle of it.
2. a kind of unidirectional relief valve according to claim 1 is characterized in that: be provided with spring between described sleeve (7) and the main valve seat (3), be provided with spring between described conduit (8) and the main valve seat (3).
3. a kind of unidirectional relief valve according to claim 1 is characterized in that: described main valve seat (3) external frame is a hierarchic structure.
CN2009202976361U 2009-12-11 2009-12-11 One-way overflow valve Expired - Fee Related CN201636400U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202976361U CN201636400U (en) 2009-12-11 2009-12-11 One-way overflow valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202976361U CN201636400U (en) 2009-12-11 2009-12-11 One-way overflow valve

Publications (1)

Publication Number Publication Date
CN201636400U true CN201636400U (en) 2010-11-17

Family

ID=43080893

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009202976361U Expired - Fee Related CN201636400U (en) 2009-12-11 2009-12-11 One-way overflow valve

Country Status (1)

Country Link
CN (1) CN201636400U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103615424A (en) * 2013-12-09 2014-03-05 怀特(中国)驱动产品有限公司 Direct-operated-type hydraulic threaded insertion buffer overflow valve
CN103775438A (en) * 2013-12-31 2014-05-07 江苏南铸科技股份有限公司 Overload protective valve and overload valve comprising same
CN105221510A (en) * 2015-10-31 2016-01-06 山东科技大学 A kind of Multipurpose hydraulic valve and application thereof
CN108302077A (en) * 2018-02-05 2018-07-20 陈艳艳 A kind of overload oil compensating valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103615424A (en) * 2013-12-09 2014-03-05 怀特(中国)驱动产品有限公司 Direct-operated-type hydraulic threaded insertion buffer overflow valve
CN103615424B (en) * 2013-12-09 2015-12-30 怀特(中国)驱动产品有限公司 Direct moving type hydraulic thread cartridge buffer overflow valve
CN103775438A (en) * 2013-12-31 2014-05-07 江苏南铸科技股份有限公司 Overload protective valve and overload valve comprising same
CN105221510A (en) * 2015-10-31 2016-01-06 山东科技大学 A kind of Multipurpose hydraulic valve and application thereof
CN105221510B (en) * 2015-10-31 2017-05-10 山东科技大学 Multipurpose hydraulic valve and application thereof
CN108302077A (en) * 2018-02-05 2018-07-20 陈艳艳 A kind of overload oil compensating valve

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101117

Termination date: 20131211