CN203570729U - Piloted relief valve - Google Patents
Piloted relief valve Download PDFInfo
- Publication number
- CN203570729U CN203570729U CN201320662548.3U CN201320662548U CN203570729U CN 203570729 U CN203570729 U CN 203570729U CN 201320662548 U CN201320662548 U CN 201320662548U CN 203570729 U CN203570729 U CN 203570729U
- Authority
- CN
- China
- Prior art keywords
- main valve
- elastic component
- valve
- spool
- valve seat
- 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
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model discloses a piloted relief valve which comprises a main valve sleeve. A hollow cavity is formed in the main valve sleeve, a first oil port is axially formed in the lower end of the main valve sleeve, a second oil port is radially formed in the lower end, a main spool is arranged in the cavity at the lower end of the main valve sleeve in a sliding mode, a valve seat is arranged at the position of the rear end of the main spool, a through hole for oil liquid to pass through is formed in the middle of a valve seat, a first elastic element is arranged between the valve seat and the main spool, a guide sleeve is inserted into the rear end of the main valve sleeve, a pilot spool is arranged in the guide sleeve in a sliding mode, the rear end of the pilot spool butts against a second elastic element, the second elastic element butts against the pilot spool to enable the pilot spool to seal the through hole in the valve seat, and an adjusting device for adjusting the tightness degree of the second elastic element is arranged behind the second elastic element. The piloted relief valve is compact in integral structure, small in size, light in weight, reliable in work, small in internal leakage and capable of being applied to various mechanized equipment and hydraulic systems with high working pressure, large flow and high integration.
Description
Technical field
The utility model relates to a kind of relief valve, belongs to hydrovalve technical field.
Background technique
Relief valve mainly plays level pressure overflow effect, voltage stabilizing, system unloaded and safety protection effect in hydraulic equipment.Level pressure overflow effect: in metering pump throttling regulating system, metering pump provides constant flow rate.When system pressure increases, can make traffic demand reduce.Now relief valve is opened, and makes the unnecessary flow oil sump tank that overflows, guarantees relief valve inlet pressure, i.e. pump discharge pressure constant (valve port is often with pressure surge unlatching).Pressure stabilization function: relief valve is connected on oil circuit, relief valve produces back pressure moving element stationarity to be increased.System unloaded effect: be connected in series the solenoid valve of the small flow that overflows at the remote control mouth of relief valve, when electromagnet is switched on, the remote control mouth of relief valve leads to fuel tank, now oil hydraulic pump off-load.Relief valve now uses as unloading valve.Safety protection effect: when system is normally worked, valve closing.While only having load to surpass the limit (system pressure surpass set pressure) of regulation, open overflow, carry out overload protection, make system pressure no longer increase (conventionally make the set pressure of relief valve higher by 10%～20% than system Maximum operating pressure).In practical application, generally have: be used as unloading valve, make remote pressure regulating valve, make high low pressure multilevel control valve, make sequence valve, for generation of back pressure (string is on oil circuit).
General structure of relief valve is more complicated, and assembling volume is large, is therefore necessary to make improvements.
Summary of the invention
For the deficiencies in the prior art, the utility model provides pilot operated compound relief valve, simple in structure, and volume is small and exquisite, applicable to high workload pressure, large flow, integrated requirement in high various mechanized equipments and hydraulic system.
The utility model is achieved by the following technical solution: pilot operated compound relief valve, comprise main valve housing, described main valve housing has hollow cavity, lower end at described main valve housing axially offers the first hydraulic fluid port, lower end radially offers the second hydraulic fluid port, in the cavity of described main valve housing lower end, slide main valve plug is set, back-end location at described main valve plug arranges valve seat, described valve seat middle part offers the through hole passing through for fluid, between described valve seat and described main valve plug, the first elastic component is set, in described main valve housing rear end, plug guide sleeve, in described guide sleeve, slide guide's spool is set, described guide's spool rear end leans the second elastic component, by the second elastic component, lean described guide's spool and realize the sealing of guide's spool to through hole in valve seat, at described the second elastic component rear, be provided with the controlling device of adjusting the second elastic component elasticity.
In technique scheme, described controlling device comprises spring seat, adjusting nut and adjusting screw rod, and described spring seat inserts the rear end of described the second elastic component, and described adjusting screw rod is screwed in the inside of described guide sleeve and leaned described spring seat by an adjusting nut.
In technique scheme, described the first elastic component and the second elastic component are spring.
In technique scheme, in the sidewall spacers of described main valve plug, be evenly provided with some circular grooves.
In technique scheme, the draw-in groove of a ring shape is set at described valve seat back-end location, in described main valve housing inner side, is provided with the step coordinating with described draw-in groove, valve seat is equipped with in described main valve housing by draw-in groove and described step.
In technique scheme, at described valve seat medium position, one circle mounting groove is set, O type circle and O type circle back-up ring are set in described mounting groove.
The utlity model has following beneficial effect: compact overall structure, volume is little, lightweight, reliable operation, internal leakage is little, applicable to high workload pressure, large flow, integrated requirement in high various mechanized equipments and hydraulic system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, referring to Fig. 1 to Fig. 2, pilot operated compound relief valve, comprise main valve housing 1, described main valve housing 1 has hollow cavity, in the lower end of described main valve housing 1, axially offer the first hydraulic fluid port 10, lower end radially offers the second hydraulic fluid port 11, in described main valve housing 1 lower end cavity, slide main valve plug 2 is set, back-end location at described main valve plug 2 arranges valve seat 3, described valve seat 3 middle parts offer the through hole 30 passing through for fluid, the first elastic component 4 is set between described valve seat 3 and described main valve plug 2, in described main valve housing 1 rear end, plug guide sleeve 5, in the interior slip of described guide sleeve 5, guide's spool 6 is set, described guide's spool 6 rear ends lean the second elastic component 7, by the second elastic component 7, lean the sealing that described guide's spool 6 is realized through hole 30 in 6 pairs of valve seats 3 of guide's spool, at described the second elastic component 7 rears, be provided with the controlling device of adjusting the second elastic component 7 elasticities.
Described controlling device comprises spring seat 82, adjusting nut 80 and adjusting screw rod 81, the rear end that described spring seat 82 inserts described the second elastic component 7, described adjusting screw rod 81 is screwed in the inside of described guide sleeve 5 and is leaned described spring seat 82 by an adjusting nut 80.Preferably, described the first elastic component 4 and the second elastic component 7 are spring.Certain the first elastic component 4 and the second elastic component 7 can be also other elastomeric objects.By adjusting screw rod 81, be screwed into the degree of depth of guide sleeve 5 from controlling the pretightening force size of the second elastic component 7.
Sidewall spacers at described main valve plug 2 is evenly provided with some circular grooves 20, reduces the radial force that main valve plug 2 is subject to when the interior slip of main valve housing 1, prevents that main valve plug situation stuck or that fluid is revealed from the cooperation place of main valve plug and main valve housing from occurring.
The draw-in groove 31 of one ring shape is set at described valve seat 3 back-end locations, in described main valve housing 1 inner side, be provided with the step coordinating with described draw-in groove 31, valve seat 3 is equipped with in described main valve housing 1 by draw-in groove 31 and described step, this structure, when valve assembles, the inner chamber that directly valve seat 3 is inserted to main valve housing 1 realizes the aligned fit of draw-in groove 31 and step, easy for installation, has improved the efficiency of valve assembling.
At described valve seat 3 medium positions, one circle mounting groove 32 is set, at interior O type circle 34 and the O type circle back-up ring 33 of arranging of described mounting groove 32.Be convenient to fluid reveals from the gap of valve seat 3 and main valve housing 1 inwall.
Claims (6)
1. pilot operated compound relief valve, it is characterized in that: comprise main valve housing (1), described main valve housing (1) has hollow cavity, in the lower end of described main valve housing (1), axially offer the first hydraulic fluid port (10), lower end radially offers the second hydraulic fluid port (11), in the cavity of described main valve housing (1) lower end, slide main valve plug (2) is set, back-end location at described main valve plug (2) arranges valve seat (3), described valve seat (3) middle part offers the through hole (30) passing through for fluid, between described valve seat (3) and described main valve plug (2), the first elastic component (4) is set, in described main valve housing (1) rear end, plug guide sleeve (5), in described guide sleeve (5), slide guide's spool (6) is set, described guide's spool (6) rear end leans the second elastic component (7), by the second elastic component (7), lean described guide's spool (6) and realize the sealing of guide's spool (6) to through hole (30) in valve seat (3), at described the second elastic component (7) rear, be provided with the controlling device of adjusting the second elastic component (7) elasticity.
2. pilot operated compound relief valve as claimed in claim 1, it is characterized in that: described controlling device comprises spring seat (82), adjusting nut (80) and adjusting screw rod (81), described spring seat (82) inserts the rear end of described the second elastic component (7), and described adjusting screw rod (81) is screwed in the inside of described guide sleeve (5) and leaned described spring seat (82) by an adjusting nut (80).
3. the pilot operated compound relief valve described in claim 1 or 2, is characterized in that: described the first elastic component (4) and the second elastic component (7) are spring.
4. pilot operated compound relief valve as claimed in claim 1, is characterized in that: the sidewall spacers at described main valve plug (2) is evenly provided with some circular grooves (20).
5. pilot operated compound relief valve as claimed in claim 1, it is characterized in that: the draw-in groove (31) that a ring shape is set at described valve seat (3) back-end location, in described main valve housing (1) inner side, be provided with the step coordinating with described draw-in groove (31), valve seat (3) is equipped with in described main valve housing (1) by draw-in groove (31) and described step.
6. pilot operated compound relief valve as claimed in claim 1, is characterized in that: at described valve seat, (3 medium positions arrange a circle mounting groove (32), and O type circle (34) and O type circle back-up ring (33) are set in described mounting groove (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662548.3U CN203570729U (en) | 2013-10-25 | 2013-10-25 | Piloted relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662548.3U CN203570729U (en) | 2013-10-25 | 2013-10-25 | Piloted relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203570729U true CN203570729U (en) | 2014-04-30 |
Family
ID=50538462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320662548.3U Expired - Fee Related CN203570729U (en) | 2013-10-25 | 2013-10-25 | Piloted relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203570729U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134681A (en) * | 2015-10-08 | 2015-12-09 | 杭州力龙液压有限公司 | One-way cushion overflow valve and closed-type hydraulic pump |
| CN106351906A (en) * | 2016-11-15 | 2017-01-25 | 湖南凯恩利液压机械制造有限公司 | Overflow valve |
| CN108005975A (en) * | 2016-10-28 | 2018-05-08 | 上海立新液压有限公司 | A kind of high-efficient simple type sequence valve |
| CN112460092A (en) * | 2020-12-10 | 2021-03-09 | 山东泰丰智能控制股份有限公司 | Flow valve and overflow valve integrated threaded cartridge valve |
| CN114233905A (en) * | 2021-12-28 | 2022-03-25 | 哈尔滨工业大学 | High-precision electro-hydraulic proportional overflow valve with multiple steady-state hydraulic compensation mechanisms |
-
2013
- 2013-10-25 CN CN201320662548.3U patent/CN203570729U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134681A (en) * | 2015-10-08 | 2015-12-09 | 杭州力龙液压有限公司 | One-way cushion overflow valve and closed-type hydraulic pump |
| CN105134681B (en) * | 2015-10-08 | 2017-06-06 | 杭州力龙液压有限公司 | A kind of one-way buffer overflow valve and closed type hydraulic pump |
| CN108005975A (en) * | 2016-10-28 | 2018-05-08 | 上海立新液压有限公司 | A kind of high-efficient simple type sequence valve |
| CN106351906A (en) * | 2016-11-15 | 2017-01-25 | 湖南凯恩利液压机械制造有限公司 | Overflow valve |
| CN106351906B (en) * | 2016-11-15 | 2019-02-15 | 湖南凯恩利液压机械制造有限公司 | A kind of overflow valve |
| CN112460092A (en) * | 2020-12-10 | 2021-03-09 | 山东泰丰智能控制股份有限公司 | Flow valve and overflow valve integrated threaded cartridge valve |
| CN114233905A (en) * | 2021-12-28 | 2022-03-25 | 哈尔滨工业大学 | High-precision electro-hydraulic proportional overflow valve with multiple steady-state hydraulic compensation mechanisms |
| CN114233905B (en) * | 2021-12-28 | 2022-11-22 | 哈尔滨工业大学 | High-precision electro-hydraulic proportional overflow valve with multiple steady-state hydraulic compensation mechanisms |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203570729U (en) | Piloted relief valve | |
| CN203670808U (en) | Pilot-operated overflow valve | |
| CN204805220U (en) | Piston ultralow pressure overflow valve | |
| CN211501147U (en) | Ultrahigh-pressure large-flow high-water-base unloading valve | |
| CN101943202B (en) | Link bolt with pilot type reducing valve | |
| CN211259779U (en) | Piston type pressure reducing valve with direct flow channel | |
| CN202851494U (en) | Pilot-operated type overflow valve | |
| CN107606292B (en) | A kind of nested type double-piston pilot valve | |
| CN203321921U (en) | Pilot-operated type overflow valve | |
| CN104963905B (en) | Two-stage overflow unloading valve | |
| CN201273386Y (en) | Piston type pressure-control check valve | |
| CN202832603U (en) | Novel medium-flux hydraulic control one-way valve | |
| CN102072216B (en) | Energy-saving reducing valve for hydraulic system | |
| CN111005906A (en) | Ultrahigh-pressure large-flow high-water-base unloading valve | |
| CN210600323U (en) | Direct-acting pressure control valve | |
| CN204436920U (en) | A kind of anticlogging pilot-type relief valve | |
| CN103775438A (en) | Overload protective valve and overload valve comprising same | |
| CN202501051U (en) | Electromagnetic control non-return valve | |
| CN103697006B (en) | A kind of integral multi-way reversing valve overload oil compensating valve | |
| CN212616537U (en) | Pressure reducing valve with built-in oil return one-way pressure stabilizing structure | |
| CN104214090B (en) | An integral structure of a gear pump and a jet flow valve | |
| CN105370933A (en) | Unloading one-way valve | |
| CN204942129U (en) | Integrated form height adjusting valve | |
| CN215059825U (en) | Pulse electromagnetic valve with pressure reduction and flow regulation | |
| CN205298112U (en) | Stacked liquid -control unidirectional valve |
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 |
Granted publication date: 20140430 Termination date: 20141025 |
|
| EXPY | Termination of patent right or utility model |