CN201306326Y - Hydraulic multichannel conversion valve - Google Patents
Hydraulic multichannel conversion valve Download PDFInfo
- Publication number
- CN201306326Y CN201306326Y CNU2008201432055U CN200820143205U CN201306326Y CN 201306326 Y CN201306326 Y CN 201306326Y CN U2008201432055 U CNU2008201432055 U CN U2008201432055U CN 200820143205 U CN200820143205 U CN 200820143205U CN 201306326 Y CN201306326 Y CN 201306326Y
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- valve
- valve body
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- needle
- core
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Abstract
The utility model relates to a hydraulic multichannel conversion valve which consists of a left -right drive valve, and the drive valve comprises a drive valve body and a valve core. The hydraulic multichannel conversion valve is characterized in that the drive valve body is provided with an overload protection valve; the overload protection valve is connected with an oil inlet-outlet hole of the valve body; the overload protection valve comprises a main valve body, an auxiliary valve body, a valve needle and a one-way valve core; the rear end of the main valve body forms a spiro connection with the auxiliary valve body; the valve needle is arranged in an inner cavity of the auxiliary valve body; the rear end of the valve needle is connected with a reset spring in a sleeving mode; the taper-shaped valve needle is contacted with an oil hole of the front end of the auxiliary valve; the front end of the one-way valve core is provided with a circular hole; the circular hole is matched with with a throttle valve core in a sliding way; the rear end of the throttle valve core the centre of which is provided with a throttle hole is provided with a spring; and a pressure releasing cavity is formed between the front end of the auxiliary valve body and the inner cavity of the one-way valve core. The utility model has the advantages of realizing micro-motion effect, increasing overload protection valve, making instantaneous high pressure delivered by a work system start before a release valve of the system releasing load, removing peak pressure, and effectively protecting hydraulic pieces and structure pieces from devastating impact.
Description
Technical field
The utility model belongs to hydraulic multitandem valve, relates in particular to a kind of hydraulic multichannel conversion valve that is applied to the work machine operation system.
Background technique
Hydraulic multitandem valve is the critical piece that mini-excavator, rig and other engineering machinery working connection control system adopt.Hydraulic multitandem valve is made up of left and right sides actuating valve, and the split blade type series parallel structure that each group valve partly is made up of walking, quartering hammer, scraper bowl, swing arm, dipper five has again been realized functions such as interlock, commutation.Multi-way valve adopts manual decompression type pilot operated, and manually the control oil channel of reduction valve formula pilot valve is formed and handled the loop by the independent fuel feeding of gear pump.Handle the position of pilot valve handle and different direction, its delivery pressure is changed in the 0-4Mpa pressure range,, make the driver when handling pilot valve, not only easily but also the sensation of steering force and position arranged with the aperture and the commutation of control hydraulic multitandem valve.Actuating valve comprises main valve body and spool, and spool adopts the secondary otch to form the secondary convex shoulder, reduces hydraulic shock greatly, increases speed adjustable range, has good fretting performance.Left and right sides actuating valve group adopts the interflow system, significantly reduces energy loss.There is following shortcoming in the operation system of hydraulic multitandem valve: when action was handled, operator's feel was stiff, handled stroke painstaking and can not better controlled working connection spool; Operating rate can not be stablized, and oil circuit pressure is in the process of a long-term concussion fluctuation, can cause fatigue ruption to the hydraulic pressure components and parts.Along with people require progressively to improve to the operation of excavator, market demand urgently exploitation on handling, accomplish easier to be more comfortable, the engineering machinery of protection hydraulic element.
The model utility content
The purpose of this utility model is to overcome the deficiency of above-mentioned technology, and a kind of hydraulic multichannel conversion valve is provided, and spool is improved, and has realized jiggle effect; Open before setting up the relief valve off-load of instantaneous high pressure in system that the overload protection valve passes work system to come, can remove surge pressure, effectively protected hydraulic parts and structural member to avoid damaging impact.
The utility model for achieving the above object; by the following technical solutions: a kind of hydraulic multichannel conversion valve; form by left and right sides actuating valve; actuating valve comprises actuating valve valve body and spool; it is characterized in that: described actuating valve valve body is provided with the overload protection valve; the overload protection valve is connected with the oil inlet and outlet of valve body; described overload protection valve comprises main valve body; auxiliary valve body; needle and nonreturn valve core; described main valve body rear end is bolted with auxiliary valve body; described auxiliary valve body inner chamber is equipped with needle; needle rear end socket Returnning spring; the oilhole of tapered needle valve and auxiliary valve body front end touches, and described nonreturn valve core front end is provided with circular hole, and circular hole and throttling valve core are slidingly matched; the throttling valve core rear end that described center is provided with throttle orifice is provided with spring, forms pressure-releasing cavity between described auxiliary valve body front end and the nonreturn valve core inner chamber.
The described auxiliary valve body rear end screw press that is spirally connected, the valve gap look nut is spirally connected on the screw press.
The sealing surfaces of described spool convex shoulder is provided with balancing slit, and groove width is 0.1～0.8mm, and groove depth is 0.5～1.2mm.
Described spool convex shoulder width is 31-34mm.
The utility model beneficial effect: the requirement when having satisfied the excavator level land, realized jiggle effect; Increase the overload protection valve, make work system pass the instantaneous high pressure of coming and before the relief valve off-load of system, open, remove surge pressure, effectively protected hydraulic parts and structural member to avoid damaging impact; Overload valve is furnished with one-way valve, plays the repairing effect.Make the driver when handling pilot valve, not only easily but also the sensation of steering force and position is arranged, the transition of pressure oil increment was softer, and can also find coordination arbitrarily between two actions.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of overload protection valve among Fig. 1;
Fig. 3 is the structural representation of spool among Fig. 1.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing and preferred embodiment.
As shown in the figure; a kind of hydraulic multichannel conversion valve; form by left and right sides actuating valve; actuating valve comprises actuating valve valve body 1 and spool 2, and described actuating valve valve body is provided with overload protection valve 3, and the overload protection valve is connected with the oil inlet and outlet 4 of valve body; described overload protection valve comprises main valve body 5, auxiliary valve body 6, needle 7 and nonreturn valve core 8; nonreturn valve core plays the repairing effect, efficiently solves because individual part fuel feeding deficiency causes oil-feed port the problem of negative pressure to occur, prevents to inhale empty.Described main valve body rear end is bolted with auxiliary valve body, described auxiliary valve body inner chamber is equipped with needle, needle rear end socket Returnning spring 9, the oilhole of tapered needle valve and auxiliary valve body front end touches, described nonreturn valve core front end is provided with circular hole 10, circular hole and throttling valve core 11 are slidingly matched, and the throttling valve core rear end that described center is provided with throttle orifice 12 is provided with spring 13, form pressure-releasing cavity 14 between described auxiliary valve body front end and the nonreturn valve core inner chamber.The described auxiliary valve body rear end screw press 15 that is spirally connected, the valve gap look nut 16 that is spirally connected on the screw press can be adjusted the oil pressure that unloads of the pressure of Returnning spring and needle.The sealing surfaces of described spool convex shoulder 17 is provided with balancing slit 18, and groove width is 0.1～0.8mm, and groove depth is 0.5～1.2mm.The effect of balancing slit, one, the effect of balance valve core is arranged, allow spool be unlikely to produce card valve phenomenon to one side of valve body run-off the straight; Two, be further to improve sealing effect, allow the fluid that flows through by spool and valve body gap that turbulent flow takes place herein, thereby react on the fluid that flows through, play the effect that hinders the fluid circulation.Because the spool two ends are even for high pressure, so open on the surface of spool the position of groove.Can reduce oil sealing length though hold balancing slit,, leakage rate be reduced so open balancing slit because of having reduced the leakage of eccentric annulus.Spool does not adopt Sealing, but by improving the spool machining accuracy, making spool and valve body matching gap is 0.008-0.012mm, allow the spool fast moving sub-fraction fluid be brought in the gap of spool and valve body, stop spool two ends fluid to be scurried mutually thereby produce oil film, thereby play the effect of sealing.And play the dynamic pressure support effect by oil film, avoid spool and valve body directly to contact and form dry grinding.Utilize concentric circle slit flow formula: q=π dh
3△ p/12 μ l ± π dh υ/2 and eccentric circle slit flow formula: q=π dh
3△ p (1+1.5 ε
2(ε---relative eccentric ratio, ε=e/h), compare as calculated: the maximum eccentric leakage rate is 2.5 times of concentric ring to)/12 μ l ± π dh υ/2.Described spool convex shoulder width is 31-34mm, and the convex shoulder of spool finds one to take into account sensitivity and shock proof optimum through calculating accurately and test.Both allowed the flow gain of zero lap valve constant, the little zero-bit in dead band, leaked for a short time, and can guarantee that again spool had good supporting, and the temporary impact that brings can reduce the spool commutation time.Draw in the test: surge pressure is during 34mm: the 16.7Mpa reaction velocity is 0.02S; Surge pressure is during 33mm: the 18.8Mpa reaction velocity is 0.18S; Surge pressure is during 32mm: the 21.5Mpa reaction velocity is 0.16S; Surge pressure is during 31mm: the 24.3Mpa reaction velocity is 0.14S.
Multi-way valve adopts manual decompression type pilot operated, and manually the control oil channel of reduction valve formula pilot valve is formed and handled the loop by the independent fuel feeding of gear pump.Handle the position of pilot valve handle and different direction, its delivery pressure is changed in the 0-4Mpa pressure range, aperture and commutation with control hydraulic control multi-way valve, make the driver when handling pilot valve, not only easily but also the sensation of steering force and position arranged, the transition of pressure oil increment is softer, and can also find coordination arbitrarily between two actions.Working principle: the load in very first time perception work the place ahead; when induced pressure surpasses the pressure of working oil path; high pressure oil is entered in the auxiliary valve body ante-chamber by the throttle orifice of throttling valve core, promotes needle, overcomes the spring force that is added on the needle; push needle open; make nonreturn valve core front end and its rear end form pressure difference, high pressure oil promotes to move behind the nonreturn valve core, causes the oil inlet and outlet on the main valve body to be communicated with; high pressure oil discharges rapidly, can effectively protect hydraulic parts and structural member to avoid damaging impact.
The above only is preferred embodiment of the present utility model, is not structure of the present utility model is done any pro forma restriction.Every foundation technical spirit of the present utility model all still belongs in the scope of the technical solution of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1; a kind of hydraulic multichannel conversion valve; form by left and right sides actuating valve; actuating valve comprises actuating valve valve body and spool; it is characterized in that: described actuating valve valve body is provided with the overload protection valve; the overload protection valve is connected with the oil inlet and outlet of valve body; described overload protection valve comprises main valve body; auxiliary valve body; needle and nonreturn valve core; described main valve body rear end is bolted with auxiliary valve body; described auxiliary valve body inner chamber is equipped with needle; needle rear end socket Returnning spring; the oilhole of tapered needle valve and auxiliary valve body front end touches; described nonreturn valve core front end is provided with circular hole; circular hole and throttling valve core are slidingly matched, and the throttling valve core rear end that described center is provided with throttle orifice is provided with spring, form pressure-releasing cavity between described auxiliary valve body front end and the nonreturn valve core inner chamber.
2, hydraulic multichannel conversion valve according to claim 1 is characterized in that: the described auxiliary valve body rear end screw press that is spirally connected, the valve gap look nut is spirally connected on the screw press.
3, hydraulic multichannel conversion valve according to claim 1 and 2 is characterized in that: the sealing surfaces of described spool convex shoulder is provided with balancing slit, and groove width is 0.1～0.8mm, and groove depth is 0.5～1.2mm.
4, hydraulic multichannel conversion valve according to claim 3 is characterized in that: described spool convex shoulder width is 31-34mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201432055U CN201306326Y (en) | 2008-11-17 | 2008-11-17 | Hydraulic multichannel conversion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201432055U CN201306326Y (en) | 2008-11-17 | 2008-11-17 | Hydraulic multichannel conversion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306326Y true CN201306326Y (en) | 2009-09-09 |
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ID=41098792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201432055U Expired - Fee Related CN201306326Y (en) | 2008-11-17 | 2008-11-17 | Hydraulic multichannel conversion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201306326Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900144A (en) * | 2010-07-22 | 2010-12-01 | 泸州众大科技液压件有限公司 | Small-sized drill pile-up valve |
| CN104235096A (en) * | 2013-08-19 | 2014-12-24 | 江苏恒立液压有限公司 | Hydraulic-control main valve for energy recycling |
| WO2015024152A1 (en) * | 2013-08-19 | 2015-02-26 | 江苏恒立液压有限公司 | Energy-recycling hydraulic control main valve |
| CN105065359A (en) * | 2015-08-13 | 2015-11-18 | 山东常林机械集团股份有限公司 | Safety oil supplementing valve for multi-path valve |
| CN111094761A (en) * | 2018-01-31 | 2020-05-01 | Ｋｙｂ株式会社 | Valve device |
| CN114294282A (en) * | 2021-12-26 | 2022-04-08 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way valve |
-
2008
- 2008-11-17 CN CNU2008201432055U patent/CN201306326Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900144A (en) * | 2010-07-22 | 2010-12-01 | 泸州众大科技液压件有限公司 | Small-sized drill pile-up valve |
| CN101900144B (en) * | 2010-07-22 | 2012-11-07 | 泸州众大科技液压件有限公司 | Small-sized drill pile-up valve |
| CN104235096A (en) * | 2013-08-19 | 2014-12-24 | 江苏恒立液压有限公司 | Hydraulic-control main valve for energy recycling |
| WO2015024152A1 (en) * | 2013-08-19 | 2015-02-26 | 江苏恒立液压有限公司 | Energy-recycling hydraulic control main valve |
| US9791056B2 (en) | 2013-08-19 | 2017-10-17 | Jiangsu Hengli Hydraulic Technology Co., Ltd. | Energy-recycling hydraulic control main valve |
| CN105065359A (en) * | 2015-08-13 | 2015-11-18 | 山东常林机械集团股份有限公司 | Safety oil supplementing valve for multi-path valve |
| CN111094761A (en) * | 2018-01-31 | 2020-05-01 | Ｋｙｂ株式会社 | Valve device |
| CN111094761B (en) * | 2018-01-31 | 2022-03-15 | Ｋｙｂ株式会社 | Valve device |
| CN114294282A (en) * | 2021-12-26 | 2022-04-08 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way valve |
| CN114294282B (en) * | 2021-12-26 | 2023-07-11 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way 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 |
Granted publication date: 20090909 Termination date: 20151117 |
|
| EXPY | Termination of patent right or utility model |