CN205371728U - Quick off -load relief valve - Google Patents
Quick off -load relief valve Download PDFInfo
- Publication number
- CN205371728U CN205371728U CN201620104164.3U CN201620104164U CN205371728U CN 205371728 U CN205371728 U CN 205371728U CN 201620104164 U CN201620104164 U CN 201620104164U CN 205371728 U CN205371728 U CN 205371728U
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- valve body
- spool
- diameter
- main valve
- fixed cover
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Abstract
The utility model provides a relief valve can be adjusted, set for to circulation pressure for cracking pressure, and it includes valve body and case, the valve body includes the main valve body and spring box, the case includes the less great main part of throttle end, conical transition, diameter of diameter, establish the fixed cover of seting up the step hole in the right -hand member of the main valve body, remove in the fixed cover and be provided with the case, the diameter that the diameter in the less left hole in aperture is greater than case throttle end nevertheless is lighter than valve element's diameter, at the great right downthehole annular groove of offering in fixed cover aperture, communicates with each other with the oil inlet of offering on the main valve body, and the annular groove intercommunication is fixed to overlap left hole, be provided with resetting means in spring box, still set up at the internal sliding sleeve of main valve including removing for adjustment sliding sleeve axial position's adjusting device, set up the recess in the sliding sleeve, the recess communicates with each other with the oil -out of opening on the main valve body, and the orifice has been seted up to its right -hand member, and the diameter of orifice slightly is greater than the diameter of case throttle end.
Description
Technical field
This technology relates to Hydraulic Elements, it is provided that a kind of relief valve, especially a kind of quick relief relief valve being used for the system such as accumulator and Hydraulic Drive in Vessel steering wheel, and the circulating pressure of this quick relief relief valve can regulate relative to opening pressure, set.
Background technology
Relief valve is used for the system such as accumulator and Hydraulic Drive in Vessel steering wheel; primarily serve the purpose of: when causing accumulator or oil circuit overload due to external force or fortuitous event; relief valve is quickly opened and is carried out off-load overflow, to reach the safety of the parts such as protection accumulator, oil circuit, actuator.
In prior art, many employing direct-acting overflow valves or pilot operated compound relief valve are as relief valve.Shown in Figure 4, the characteristic of direct-acting overflow valve is: due to when overflow valve is opened pressure often than full flow oil pressure relief little a lot, being set up by overflow valve in time occurring from full flow is 1.25 times of operating pressures, but the situation of overflow valve overflow leakage when 100% operating pressure, this is owing to the reason that pressure ratio full flow oil pressure relief when overflow valve is opened is much smaller causes.Shown in Figure 5, its characteristic of pilot operated compound relief valve is better, opens pressure ratio and is closer to full flow oil pressure relief, but plugging fault easily occurs the throttle orifice of pilot operated compound relief valve, and oil circuit cleannes are required higher by it, and reliability is relatively poor.
Summary of the invention
The purpose of this technology is to provide a kind of quick relief relief valve being used for the system such as accumulator and Hydraulic Drive in Vessel steering wheel, and the circulating pressure size of this quick relief relief valve can regulate relative to opening pressure, set.
The purpose of this technology is to be achieved through the following technical solutions:
A kind of quick relief relief valve, including valve body and the mobile spool being arranged in valve body；Valve body includes main valve body and is connected in the spring box of main valve body right-hand member；Overall spool is followed successively by the less throttling end of diameter, tapering transition section, the main body that is relatively large in diameter from left to right；Set the fixed cover offering stepped hole in the right-hand member of main valve body, move in fixed cover and be provided with spool；The diameter of the left hole that aperture is less more than throttling spool end diameter but less than the diameter of spool main body, in the right hole that fixed cover aperture is bigger, offer annular groove, communicate with the oil-in being opened on main valve body, annular groove connection fixed cover left hole；The resetting means for making spool have to turn left mobile trend it is provided with in spring box；Also include moving and be arranged on the sliding sleeve that main valve body is interior, be positioned at main valve body left end, for adjusting the adjustment device of sliding sleeve axial location；Offering groove in sliding sleeve, groove communicates with the oil-out being opened on main valve body, and its right-hand member offers restriction, and the diameter of restriction is slightly larger than the diameter of throttling spool end；Main valve body is interior, sliding sleeve right-hand member is intermediate cavity to the cavity between fixed cover left end.
This technology provides the benefit that:
During use, pressure oil is entered, by oil-in, the admission chamber that fixed cover annular groove is formed with spool main body and the conical surface, oil pressure acts on fixed cover left hole and seals the spool taper surface of line right-hand member, and promote spool to overcome the spring force that resetting means acts on spool to move to right, opening intermediate cavity, resetting means stores power simultaneously increases.The annular projection face of the spool taper surface formation that fixed cover left hole seals line right-hand member is outer shroud.Pressure oil acts on the thrust produced on outer shroud and promotes oil pressure during resetting means for opening pressure.After pressure oil enters intermediate cavity, now intermediate cavity and oil back chamber still not exclusively turn on, and only a small amount of oil produces throttle resistance by the circumferential weld restriction circulation of sliding sleeve with throttling end so that intermediate cavity produces high oil pressure.The oil pressure of intermediate cavity acts on the annular projection face between fixed cover left hole and throttling spool end, the thrust that adapter ring oil pressure produces and the thrust combined effect acting on the generation of outer shroud oil pressure, spool stress is made to strengthen, therefore the displacement turned right strengthens, to opening oil back chamber, resetting means stores power simultaneously increases further, and pressure oil is flowed out by oil-out.
After oil back chamber is opened, intermediate cavity oil pressure declines, the thrust that spool is subject to declines to some extent, and resetting means be subject to spool thrust compression after strength increase, until when the thrust of spool pressure experienced oil and resetting means act on the spring force balance on spool, quick relief relief valve just stablizes overflow under this circulating pressure.Make it move to right if now regulating sliding sleeve, then intermediate cavity choke pressure rises, and the thrust of main valve plug pressure experienced oil increases, until spool reaches the poised state under another circulating pressure, now circulating pressure rises；Otherwise, make it move to left if regulating sliding sleeve, then circulating pressure declines.
Thus, quick relief relief valve circulating pressure can individually set as required, it is possible to than opening pressure or slightly higher or low or identical.When adjusting circulating pressure and being relatively low, quick relief relief valve circulation aperture is relatively big, pressure oil by admission chamber to intermediate cavity again to oil back chamber flowing is unimpeded, flow resistance is less, it is possible to make after relief valve overload can quick relief blood pressure lowering, can play a good protection.
Set fixed cover in main valve body, optimize process for machining, reduce cost of manufacture.
As the improvement to this technology, sliding sleeve axial location scalable, adjustment device includes movement and is arranged on main valve body left end, horizontally disposed left adjusting screw rod.
This improvement, makes sliding sleeve position to adjust, thus changing the sliding sleeve axial location relative to throttling spool end, so can the circulating pressure under metered flow be adjusted.
As the further improvement to this technology, resetting means includes the left spring seat being arranged on spool right-hand member, the mobile right spring base being arranged in spring box, moves and is arranged on spring box right-hand member, horizontally disposed right adjusting screw rod, be arranged on the spiral compression spring on left spring seat and right spring base.
This improvement, with spiral compression spring for storing power element, the structure making resetting means tends to simple, use adjusting screw rod can realize precisely regulating the axial location of right spring base, and can be reliably spacing at destination locations by right spring base, to realize the pre compressed magnitude of convenience, accurate adjustable screw compression spring, and then set the unlatching pressure of quick relief relief valve.
As the further improvement to this technology, in spool, axially it is further opened with inner passage along spool.
Inner passage is set so that the oil in spring box can communicate with oil return, the movement of spool will not be counteracted.
As the further improvement to this technology, the tapering transition section of spool contacts with fixed cover and can stepped hole left hole be blocked, and oil-in can be blocked by spool main body and fixed cover inner hole.
As the further improvement to this technology, resetting means elastic force scalable, resetting means includes the left spring seat being arranged on spool right-hand member, the mobile right spring base being arranged in spring box, move and be arranged on spring box right-hand member, horizontally disposed right adjusting screw rod, be arranged on the spiral compression spring on left spring seat and right spring base.
Above-mentioned improvement, opens oil pressure active area suffered by pressure and is only the outer shroud projected area that fixed cover left hole is formed with spool main body cylindrical, and this area only accounts for the 10%～30% of spool main body cylindrical projected area.
Use less spring just can reach bigger unlatching pressure, it is simple to product design makes, and spool open degree also easily makes relatively big, increases through-current capability.
Oil pressure active area suffered by circulating pressure is only the outer shroud projected area that fixed cover left hole is formed with spool main body cylindrical, plus the medium ring projected area that fixed cover left hole and throttling spool end cylindrical are formed, this area ratio opens the outer shroud projected area big 50%～300% of pressure pressurized.
Use the choke pressure produced during circulation, larger area can being acted on, thus promoting the spring of resetting means to compress further, making fixed cover left hole increase with spool conical surface aperture, when making metered flow circulate, desirable pressure can be also less than opening pressure simultaneously, is greatly increased through-current capability.
As the further improvement to this technology, between sliding sleeve and main valve body, between fixed cover and main valve body, between fixed cover and spool, between right spring base and spring box, all it is provided with sealing ring.
Accompanying drawing explanation
Fig. 1 is the structural representation of quick relief relief valve；
Fig. 2 is the preliminary opening schematic diagram of quick relief relief valve；
Fig. 3 is the fully opened schematic diagram of quick relief relief valve；
Fig. 4 is the flow-pressure diagram figure of direct-acting overflow valve；
Fig. 5 is the flow-pressure diagram figure of precursor overflow valve；
Fig. 6 is the flow-pressure diagram figure of quick relief relief valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, this technology is described further:
Quick relief relief valve shown in Figure 1, including valve body 1 and the mobile spool 2 being arranged in valve body 1；Valve body 1 includes main valve body 101 and is connected in the spring box 102 of main valve body 101 right-hand member；Overall spool 2 is followed successively by the less throttling end 201 of diameter, tapering transition section 202, the main body 203 that is relatively large in diameter from left to right；The fixed cover 103 offering stepped hole is set in the right-hand member of main valve body 101；Move in fixed cover 103 and be provided with spool 2；The diameter of the left hole 4 that fixed cover aperture is less more than spool 2 throttle end 201 diameter but less than the diameter of main body 203, annular groove 3 is offered in the right hole that fixed cover aperture is bigger, communicating with the oil-in 5 being opened on main valve body 101, annular groove 3 connects fixed cover left hole 4；Annular groove 3 left side to stepped hole left hole 4 forms sealing line 26 and isolates；Also include mobile being arranged in main valve body 1, being positioned at the sliding sleeve 6 of main valve body 1 left end, for adjusting the adjustment device of sliding sleeve 6 axial location, and be arranged on the resetting means for making spool 2 have to turn left mobile trend in spring box 102；Offering oil back chamber 7 in sliding sleeve 6, oil back chamber 7 communicates with the oil-out 8 being opened on main valve body 101, and its right-hand member offers torus knot head piece 9, and the diameter of torus knot head piece 9 is slightly larger than the diameter of throttling end 201；Main valve body 101 is interior, sliding sleeve 6 right-hand member is intermediate cavity 10 to the cavity of stepped hole left end.
This quick relief relief valve can be considered as mainly being made up of choke valve, main valve and resetting means.
Moving in main valve body 101 and be provided with sliding sleeve 6, sliding sleeve 6 is positioned at the left end of main valve body 1.Offering oil back chamber 7 in sliding sleeve 6, oil back chamber 7 communicates with the oil-out 8 being opened on main valve body 1, and its right-hand member offers torus knot head piece 9, and the diameter of restriction 9 is slightly larger than the diameter of throttling end 201, can form circumferential weld runner between sliding sleeve 6 and throttling end 201.So, sliding sleeve 6 and throttling end 201 can form choke valve.
Choke valve and main valve share an overall spool 2, and spool 2 is followed successively by the less throttling end 201 of diameter, tapering transition section 202, the main body 203 that is relatively large in diameter from left to right, and the right-hand member at spool 2 also has axle journal 11.In spool 2, axially it is further opened with inner passage 12 along spool 2 so that the oil in spring box 102 can connect with oil return opening 7, the movement of spool 2 will not be counteracted.
The detailed description of the invention of main valve is, endoporus is that the right-hand member of the fixed cover 103 of stepped hole moves and is provided with spool 2, the diameter of the left hole 4 that fixed cover aperture is less more than spool 2 throttle end 201 diameter but less than the diameter of main body 203, in fixed cover right hole, offer annular groove 3, on main valve body 1, in annular groove 3, offer oil-in 5.Spool main body 203 moves and is arranged in fixed cover.When spool 2 and fixed cover left hole 4 are in close contact, tapering transition section 202 is divided into left and right two parts by fixed cover left hole 4 endoporus round edge, the conical surface 13 of tapering transition section 202 left-hand component is projected as adapter ring 15 on this shaft section, and the conical surface 14 of tapering transition section 202 right-hand component is projected as outer shroud 16 on this shaft section.
Cavity between sliding sleeve 6 right-hand member and stepped hole left hole 4 left end forms intermediate cavity 10.
The left adjusting screw rod 18 of the level of being provided with is moved as precisely regulating sliding sleeve 6 axial location can by sliding sleeve 6 at the reliably spacing adjustment device of destination locations at main valve body 1 left end, for sliding sleeve 6 is reliably spacing at destination locations, prevent left adjusting screw rod 18 from loosening, left adjusting screw rod 18 is additionally provided with and cap 17.It is true that the left end of main valve body 1 is end cap 19, left adjusting screw rod 18 moves and is arranged in end cap 19.
Regulate sliding sleeve 6 axial location, namely regulate the width of intermediate cavity 10, regulate the throttling end 201 axial location relative to sliding sleeve 6.
The concrete structure of the resetting means for making spool 2 have to turn left mobile trend being arranged in spring box 102 is, resetting means includes the left spring seat being arranged on spool 2 right-hand member, the mobile right spring base 20 being arranged in spring box 102, move and be arranged on spring box 102 right-hand member, horizontally disposed right adjusting screw rod 21, be arranged on the spiral compression spring 23 on left spring seat and right spring base 20.Left spring seat can be formed by the axle journal 11 on spool 2 and the shaft shoulder between main body 203 and axle journal 11, it is also possible to is formed with the pad being arranged on axle journal 11 by axle journal 11, for prior art, does not repeat.For right spring base 20 is reliably spacing at destination locations, it is prevented that right adjusting screw rod 21 loosens, and is also equipped with and cap 22 on right adjusting screw rod 21.
With the spiral compression spring 23 of dependable performance for storage power element, the structure making resetting means tends to simple, use adjusting screw rod can realize precisely regulating the axial location of right spring base 20, and can be reliably spacing at destination locations by right spring base 20, to realize the pre compressed magnitude of convenience, accurate adjustable screw compression spring 23, and then set the unlatching pressure of quick relief relief valve.
Again referring to shown in Fig. 2 Fig. 3, during the work of above-mentioned quick relief relief valve, pressure oil 25 is entered the admission chamber formed outside spool main body 203, in annular groove 3 by oil-in 5, oil pressure acts on tapering transition section 202 in the part being in outer shroud 16 projection, and promote spool 2 to overcome the active force that spiral compression spring 23 acts on spool 2 to move to right, opening intermediate cavity 10, spiral compression spring 23 stores power simultaneously increases.Pressure oil 25 acts on the thrust produced on outer shroud 16 and promotes oil pressure when spiral compression spring 23 and spool 2 for opening pressure.After pressure oil 25 enters intermediate cavity 10, now intermediate cavity 10 and oil back chamber 7 still not exclusively turn on, and only a small amount of oil produces throttling by the circumferential weld runner circulation between sliding sleeve 6 and throttling end 201, makes intermediate cavity 10 produce elevated pressures.The oil pressure of intermediate cavity 10 then acts on the thrust that tapering transition section 202 produces in the projection of adapter ring 15, the thrust combined effect that tapering transition section 202 produces in the projection of outer shroud 16 is acted on oil pressure, the displacement that spool 2 is turned right is made to strengthen, open oil back chamber 7, spiral compression spring 23 stores power to be increased further, and pressure oil 25 is flowed out by oil-out 8.
After oil back chamber 7 is opened, intermediate cavity 10 oil pressure declines, the thrust that spool 2 is subject to declines, but still more than the spring force of spiral compression spring 23, the thrust of spool 2 pressure experienced oil continues to move to right, spiral compression spring 23 stores force compresses further, until the thrust of spool 2 pressure experienced oil 25 and spiral compression spring 23 act on the force balance on spool 2, quick relief relief valve just enters the stable overflow under this circulation status.Make it move to right if now regulating sliding sleeve 6, then intermediate cavity 10 choke pressure rises, and the thrust of spool 2 pressure experienced oil increases, until spool 2 reaches the poised state under another pressure, now circulating pressure rises；Otherwise, make it move to left if regulating sliding sleeve 6, then circulating pressure declines.
This technology provides the benefit that:
The circulating pressure of quick relief relief valve can individually set as required, compare unlatching pressure can or slightly higher or low or identical, if adjust circulating pressure relatively low, it is possible to make relief valve overload after can quick relief blood pressure lowering (shown in Figure 6).
Quick relief relief valve is when adjusting circulating pressure and being relatively low, and quick relief relief valve runner aperture is relatively big, and pressure oil is by admission chamber to intermediate cavity again to oil back chamber flowing is unimpeded, flow resistance is less, is not easily blocked, and structure is reliable.
Claims (6)
1. a quick relief relief valve, including valve body and the mobile spool being arranged in valve body, is characterized in that, valve body includes main valve body and is connected in the spring box of main valve body right-hand member；Overall spool is followed successively by the less throttling end of diameter, tapering transition section, the main body that is relatively large in diameter from left to right；Set the fixed cover offering stepped hole in the right-hand member of main valve body, move in fixed cover and be provided with spool；The diameter of the left hole that aperture is less more than throttling spool end diameter but less than the diameter of spool main body, in the right hole that fixed cover aperture is bigger, offer annular groove, communicate with the oil-in being opened on main valve body, annular groove connection fixed cover left hole；The resetting means for making spool have to turn left mobile trend it is provided with in spring box；Also include moving and be arranged on the sliding sleeve that main valve body is interior, be positioned at main valve body left end, for adjusting the adjustment device of sliding sleeve axial location；Offering groove in sliding sleeve, groove communicates with the oil-out being opened on main valve body, and its right-hand member offers torus knot head piece, and the diameter of torus knot head piece is slightly larger than the diameter of throttling spool end；Main valve body is interior, sliding sleeve right-hand member is intermediate cavity to the cavity between fixed cover left end.
2. quick relief relief valve according to claim 1, is characterized in that, sliding sleeve axial location scalable, and adjustment device includes movement and is arranged on main valve body left end, horizontally disposed left adjusting screw rod.
3. quick relief relief valve according to claim 1, it is characterized in that, resetting means elastic force scalable, resetting means includes the left spring seat being arranged on spool right-hand member, the mobile right spring base being arranged in spring box, move and be arranged on spring box right-hand member, horizontally disposed right adjusting screw rod, be arranged on the spiral compression spring on left spring seat and right spring base.
4. quick relief relief valve according to claim 1, is characterized in that, is axially further opened with inner passage in spool along spool.
5. quick relief relief valve according to claim 1, is characterized in that, the tapering transition section of spool contacts with fixed cover and can stepped hole left hole be blocked, and oil-in can be blocked by spool main body and fixed cover inner hole.
6. quick relief relief valve according to claim 1, is characterized in that, is all provided with sealing ring between sliding sleeve and main valve body, between fixed cover and main valve body, between fixed cover and spool, between right spring base and spring box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620104164.3U CN205371728U (en) | 2016-02-02 | 2016-02-02 | Quick off -load relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620104164.3U CN205371728U (en) | 2016-02-02 | 2016-02-02 | Quick off -load relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205371728U true CN205371728U (en) | 2016-07-06 |
Family
ID=56264327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620104164.3U Withdrawn - After Issue CN205371728U (en) | 2016-02-02 | 2016-02-02 | Quick off -load relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205371728U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570502A (en) * | 2016-02-02 | 2016-05-11 | 南京航海仪器二厂有限公司 | Fast unloading safety valve |
| CN110454457A (en) * | 2019-08-22 | 2019-11-15 | 徐州阿马凯液压技术有限公司 | A kind of fluid power system of flow unloading valve and hydraulic crawler excavator |
| CN111255761A (en) * | 2020-01-19 | 2020-06-09 | 宁波江北宇洲液压设备厂 | Hydraulic control reversing pressure reducing valve |
-
2016
- 2016-02-02 CN CN201620104164.3U patent/CN205371728U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570502A (en) * | 2016-02-02 | 2016-05-11 | 南京航海仪器二厂有限公司 | Fast unloading safety valve |
| CN105570502B (en) * | 2016-02-02 | 2017-12-26 | 南京航海仪器二厂有限公司 | A kind of quick relief safety valve |
| CN110454457A (en) * | 2019-08-22 | 2019-11-15 | 徐州阿马凯液压技术有限公司 | A kind of fluid power system of flow unloading valve and hydraulic crawler excavator |
| CN110454457B (en) * | 2019-08-22 | 2020-07-07 | 徐州阿马凯液压技术有限公司 | Flow unloading valve and hydraulic driving system of hydraulic excavator |
| CN111255761A (en) * | 2020-01-19 | 2020-06-09 | 宁波江北宇洲液压设备厂 | Hydraulic control reversing pressure reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160706 Effective date of abandoning: 20171226 |