CN101725742A - One-way overflow valve - Google Patents
One-way overflow valve Download PDFInfo
- Publication number
- CN101725742A CN101725742A CN200910258569A CN200910258569A CN101725742A CN 101725742 A CN101725742 A CN 101725742A CN 200910258569 A CN200910258569 A CN 200910258569A CN 200910258569 A CN200910258569 A CN 200910258569A CN 101725742 A CN101725742 A CN 101725742A
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- valve seat
- main valve
- sleeve
- conduit
- main
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Abstract
The invention relates to a one-way overflow valve. The top of a valve seat (5) is provided with an oil inlet P, the lateral surface close to the top is provided with an oil return port T, and the lateral surface close to the bottom is provided with an oil drain port L; the top of a sleeve (7) is conical and is jacked at the inlet P of the valve seat (5); the rear part is hermetically connected with a main valve seat (3); the middle part of the main valve seat (3) is provided with a through hole and is communicated with an overflow port L; the rear part of the valve seat (5) is connected with the main valve seat (3) through screw threads; an adjusting screw (2) is connected to the inner side of the rear part of the main valve seat (3) through the screw threads, and is fixed by a locking nut (1); a needle valve rod (6) is jacked at a head opening of the main valve seat (3); a pressure adjusting spring (4) is arranged between the adjusting screw (2) and the needle valve rod (6); and a conduit (8) is jacked at an opening of the sleeve (7), and the middle of the conduit (8) is provided with a through hole. The one-way overflow valve can solve the problems of structure, pressure adjustable range and opening sensitivity in the prior art.
Description
Technical field
The invention belongs to the valving field, particularly relate 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 by this invention 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 technical solution adopted for the present invention to solve the technical problems 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 fluid import P, the side is provided with the fluid oil return inlet T near the place, top, the side is provided with drain tap L near the place, bottom, described sleeve (7) top is taper, and withstands on the import 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
Compact structure of the present invention, 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 an embodiment of the invention sectional drawing.
Embodiment
The present invention states the present invention below in conjunction with specific embodiment.Should understand, these real the present invention illustrate the present invention and are not used in that restriction is of the present invention outer should be understood, after the content of having read the present invention's instruction, those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims institute restricted portion equally.
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 fluid import P, the side is provided with the fluid oil return inlet T near the place, top, the side is provided with drain tap L near the place, bottom, and described sleeve 7 tops are taper, and withstand on the import 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 the P mouth enters conduit 8 centres again, when this part oil liquid pressure gets set pressure greater than 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 drain tap 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, and T flows out from outlet;
Use:
A. as constant pressure valve: this is the main application of overflow valve, and the throttle grverning hydraulic system that is combined as of quantitative hydraulic pump and overflow valve provides the constant pressure liquid potential source as mentioned above.
B. as safety valve: in occasions such as positive displacement, volume throttle type governing system and bypass throttling speed governing systems, overflow valve often acts on safety valve, prevents from protecting whole hydraulic system safety because failure and other reasons causes system pressure too high.
C. as counterbalance valve: in the in-line throttling speed control circuit, adopt overflow valve to make counterbalance valve, can in the oil back chamber of executive component, produce constant backpressure, thereby can improve the stationarity of actuator movement, can prevent the emptying and Air infitration of oil back chamber 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 import P, the side is provided with the fluid oil return inlet T near the place, top, the side is provided with drain tap L near the place, bottom, described sleeve (7) top is taper, and withstands on the import 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.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910258569A CN101725742A (en) | 2009-12-11 | 2009-12-11 | One-way overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910258569A CN101725742A (en) | 2009-12-11 | 2009-12-11 | One-way overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101725742A true CN101725742A (en) | 2010-06-09 |
Family
ID=42447095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910258569A Pending CN101725742A (en) | 2009-12-11 | 2009-12-11 | One-way overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101725742A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444637A (en) * | 2011-09-27 | 2012-05-09 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN102829032A (en) * | 2012-09-28 | 2012-12-19 | 南京讯联液压件有限公司 | Large-flow check valve for filter |
| CN102829031A (en) * | 2012-09-28 | 2012-12-19 | 南京讯联液压件有限公司 | Integral large-flow check valve |
| CN102829033A (en) * | 2012-09-28 | 2012-12-19 | 南京讯联液压件有限公司 | Plug-in type large-flow check valve |
| CN104358902A (en) * | 2014-10-15 | 2015-02-18 | 浙江华益机械有限公司 | Pressure safety valve |
| CN105697832A (en) * | 2016-04-19 | 2016-06-22 | 龙工（上海）精工液压有限公司 | Safety valve with buffer performance |
| CN111795031A (en) * | 2020-07-13 | 2020-10-20 | 孙洋洋 | Slide valve type one-way overflow valve |
-
2009
- 2009-12-11 CN CN200910258569A patent/CN101725742A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444637A (en) * | 2011-09-27 | 2012-05-09 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN102444637B (en) * | 2011-09-27 | 2014-06-18 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN102829032A (en) * | 2012-09-28 | 2012-12-19 | 南京讯联液压件有限公司 | Large-flow check valve for filter |
| CN102829031A (en) * | 2012-09-28 | 2012-12-19 | 南京讯联液压件有限公司 | Integral large-flow check valve |
| CN102829033A (en) * | 2012-09-28 | 2012-12-19 | 南京讯联液压件有限公司 | Plug-in type large-flow check valve |
| CN102829031B (en) * | 2012-09-28 | 2016-03-16 | 南京讯联液压件有限公司 | Integrated type large-flow check valve |
| CN102829032B (en) * | 2012-09-28 | 2016-06-22 | 南京讯联液压件有限公司 | The large-flow check valve of filter |
| CN104358902A (en) * | 2014-10-15 | 2015-02-18 | 浙江华益机械有限公司 | Pressure safety valve |
| CN105697832A (en) * | 2016-04-19 | 2016-06-22 | 龙工（上海）精工液压有限公司 | Safety valve with buffer performance |
| CN111795031A (en) * | 2020-07-13 | 2020-10-20 | 孙洋洋 | Slide valve type one-way overflow valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100609 |