CN105545854A - Multiple directional control valve integrating return oil regeneration - Google Patents
Multiple directional control valve integrating return oil regeneration Download PDFInfo
- Publication number
- CN105545854A CN105545854A CN201610028090.4A CN201610028090A CN105545854A CN 105545854 A CN105545854 A CN 105545854A CN 201610028090 A CN201610028090 A CN 201610028090A CN 105545854 A CN105545854 A CN 105545854A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- working hole
- oil return
- directional control
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/029—Counterbalance valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
Abstract
The invention relates to hydraulic technology, particularly to a multiple directional control valve integrating return oil regeneration. The multiple directional control valve is characterized in that a safety valve, an overload valve, a check valve and a return oil regeneration system are integrated inside a valve body, wherein the return oil regeneration system comprises a back pressure valve and an oil supplementation check valve; the back pressure valve is arranged in the valve body between an oil return channel of a working port A and a valve oil return channel; and the oil supplementation check valve is arranged between the oil return channel of the working port A and a working port B. According to the multiple directional control valve, the air suction phenomenon of a rodless cavity of an oil cylinder is reduced, the damage of a cavitation phenomenon to the oil cylinder is reduced, and the purpose of return oil regeneration is achieved; the valve body is integrated with a differential feed system, so that an external oil line is simplified, and the reliability is improved; and besides, improvement that a working port is additionally formed in the back side is carried out on the basis of the structure that a working port is formed in one side of a traditional valve body, and the working ports are respectively connected with task executing elements.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, particularly relate to a kind of multiple directional control valve and the installation method that are applied to the integrated oil return regeneration of hydraulic components of construction machinery and hydraulic system.
Background technique
Hydraulic multichannel conversion valve is the control unit in hydraulic system, and the action of hydraulic control oil cylinder executive component, belongs to central brain, so the performance good job of hydraulic multitandem valve, very large on the impact of complete machine hydraulic system.The conventional hydraulic multi-way valve of current use, when hydraulic multitandem valve is to cylinder rod chamber fuel feeding, oil cylinder resets at a high speed, rodless cavity then has 1000L/min flow fluid backflow hydraulic multitandem valve, pressure loss in piping now between oil cylinder to multi-way valve is very large, when working long hours, oil temperature in hydraulic system sharply rises, damage other hydraulic element in hydraulic system, reduce hydraulic work efficiency, the operating mode later stage is along with cylinder action simultaneously, and the insufficient generation emptying phenomenon of rod chamber oil-feed, causes cavitation phenomenon, damage oil cylinder and Sealing, accelerate hydraulic system wearing and tearing.
In addition, existing hydraulic multitandem valve, every root valve rod corresponding 2 working holes A, B, docking cylinder rod chamber and rodless cavity, control the action of oil cylinder, when running into two oil cylinder Parallel Control, existing hydraulic multitandem valve can only connect a tee union in working hole outside, be communicated with two oil cylinders.Inconvenience is installed, and reliability reduces.
Existing solution, increases hydraulic multitandem valve latus rectum, and increase connecting pipeline latus rectum, reduce its pressure loss, this can cause hydraulic system both bulk, is not easy to install, affects the micro-control performance of low flow rate condition simultaneously, cause out of control or compression shock.
Summary of the invention
For the problems referred to above, a kind of double loop, simple and practical hydraulic multitandem valve selector valve and oil cylinder is the object of the present invention is to provide to be installed in parallel method.
For reaching above-mentioned purpose, the present invention adopts following technological scheme: a kind of multiple directional control valve of integrated oil return regeneration, comprise valve body, oil inlet P, oil return inlet T, working hole A and working hole B, be integrated with safety valve, overload valve, one-way valve in described valve body, safety valve is arranged between the oil inlet P of valve and oil return inlet T to limit hydraulic system Maximum operating pressure; Working hole A and open pressure release when overload valve being all set in order to be subject to external impacts between working hole B and oil return inlet T; One-way valve is located between oil input channel and working hole B to keep load, its difference is: the interior also integrated oil return regenerative system of described valve body, oil return regenerative system includes back pressure valve and repairing one-way valve, back pressure valve is arranged in the valve body between the back oil road of working hole A and valve back oil road, is provided with repairing one-way valve between the back oil road of working hole A and working hole B.
Described working hole A and working hole B is set to double loop structure, runs through valve body anterior-posterior plane respectively, and each two working holes A11/B11, A12/B12 before and after being formed, dock rodless cavity and the rod chamber of oil hydraulic cylinder respectively.
Described back pressure valve cracking pressure is 0.3 ~ 0.8MPa.
Described repairing one-way valve one-way valve diameter is 20 ~ 40mm.
The bore of described working hole is 23 ~ 28mm.
The present invention sets up back pressure valve at the back oil road of working hole and valve back oil road, repairing one-way valve is provided with between back oil road and working hole, reducing oil cylinder rodless cavity inhales empty, reduce cavitation phenomenon to the damage of oil cylinder, arrive the object of oil return regeneration, the integrated differential feed system of valve body, simplifies outside oil circuit, promotes reliability.In addition, the structure having working hole in traditional valve body one side is improved, sets up working hole overleaf, distribution connection work executive component.For oil cylinder, original valve collaborates outward, be transplanted to interflow in valve, strengthen the oil filling capacity of pipeline, when the same terms same traffic, greatly reduce along stroke pressure loss, the length of valve body can be shortened simultaneously, be convenient to production and processing, improve valve opening machining accuracy, promote multi-way valve performance, two oil port structure facilitates the pipe-line layout of main frame simultaneously.As two cylinders be installed in parallel time, this structure without the need to tee union, reduce fault point, promote reliability.If rated flow is at the hydraulicdirectional control valve of 250 liters/min, working hole bore is decreased to 23 ~ 28 from 30 ~ 35, and the size of whole valve and abutted flange all reduces, and installs more flexible.
Accompanying drawing explanation
Fig. 1 is conventional multiple valve arrangement schematic diagram;
Fig. 2 is embodiment of the present invention structural drawing;
Fig. 3 is that the A-A of Fig. 2 is to figure;
Fig. 4 is that the B-B of Fig. 2 is to figure;
Fig. 5 is embodiment of the present invention hydraulic schematic diagram.
Description of symbols in figure:
1-oil hydraulic cylinder I, 2-oil hydraulic cylinder II, 3-working hole A, 4-working hole B, 5-overload valve, 6-one-way valve, 7-valve body, 8-valve rod, 9-working hole A11,10-working hole B11,11-working hole A21,12-working hole B21,13-safety valve, 14-back pressure valve, 15-pressure-supplementing valve.
Embodiment
For understanding the present invention better, below in conjunction with the drawings and specific embodiments, technological scheme of the present invention is further described, see Fig. 1 to Fig. 5.
By the multiple directional control valve of a kind of integrated oil return regeneration of the invention process, include valve body, comprise valve body, oil inlet P, oil return inlet T, working hole, safety valve, overload valve, one-way valve is integrated with in valve body, safety valve is arranged between the oil inlet P of valve and oil return inlet T, to limit hydraulic system Maximum operating pressure.Pressure release is opened when overload valve being all set in order to be subject to external impacts between working hole and oil return inlet T, one-way valve is located between oil input channel and working hole B to keep load, a back pressure valve is set between working hole A back oil road T1 and back oil road T, during working hole A small flow oil return, back pressure valve produces choke pressure hardly, namely back oil road T1 is identical with back oil road T pressure, the direct oil return of fluid, when flow increases, back pressure valve produces certain restriction effect, back oil road T1 sets up certain pressure, under the effect of oil pressure, repairing one-way valve is open, the fluid of back oil road T1 enters working hole B, then cylinder rod chamber is entered, such cylinder movement speed is faster, the pressure that back pressure valve produces is higher, repairing better effects if, namely formed and force repairing, arrive the effect of oil return regeneration.Back pressure valve cracking pressure of the present invention is 0.3 ~ 0.8MPa; Fill valve one-way valve diameter is 20 ~ 40mm.
Described working hole A and working hole B is set to double loop structure, run through valve body anterior-posterior plane respectively, each two working holes A11/B11, A12/B12 before and after being formed, respective oil cylinder is connected respectively with two groups of oil pipes, the minimum areas of such connection oil cylinder is increased to original 2 times, when the same terms same traffic, along stroke pressure loss basis
formula (the Δ P pressure loss, C constant, Q flow, d pipe diameter), greatly reduce along stroke pressure loss, the length of valve body can be shortened simultaneously, be convenient to production and processing, improve valve opening machining accuracy, promote multi-way valve performance, simultaneously the pipe-line layout of two oil port structure aspects main frame.If rated flow is at the hydraulicdirectional control valve of 250 liters/min, working hole bore is decreased to 23 ~ 28 from 30 ~ 35, and the size of whole valve and abutted flange all reduces, and installs more flexible.
The above, be only preferred embodiment of the present invention, and non-invention does any pro forma restriction, although the present invention is for preferred embodiment discloses as above, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make few modifications when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. the multiple directional control valve of an integrated oil return regeneration, comprise valve body, oil inlet P, oil return inlet T, working hole A and working hole B, be integrated with safety valve, overload valve, one-way valve in described valve body, safety valve is arranged between the oil inlet P of valve and oil return inlet T to limit hydraulic system Maximum operating pressure; Working hole A and open pressure release when overload valve being all set in order to be subject to external impacts between working hole B and oil return inlet T; One-way valve is located between oil input channel and working hole B to keep load, it is characterized in that: the interior also integrated oil return regenerative system of described valve body, oil return regenerative system includes back pressure valve and repairing one-way valve, back pressure valve is arranged in the valve body between the back oil road of working hole A and valve back oil road, is provided with repairing one-way valve between the back oil road of working hole A and working hole B.
2. the multiple directional control valve of integrated oil return regeneration according to claim 1, it is characterized in that: described working hole A and working hole B is set to double loop structure, run through valve body anterior-posterior plane respectively, each two working holes A11/B11, A12/B12 before and after being formed, dock rodless cavity and the rod chamber of oil hydraulic cylinder respectively.
3. the multiple directional control valve of integrated oil return regeneration according to claim 1, is characterized in that: described back pressure valve cracking pressure is 0.3 ~ 0.8MPa.
4. the multiple directional control valve of integrated oil return regeneration according to claim 1, is characterized in that: described repairing one-way valve one-way valve diameter is 20 ~ 40mm.
5. the multiple directional control valve of integrated oil return regeneration according to claim 1, is characterized in that: the bore of described working hole is 23 ~ 28mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028090.4A CN105545854A (en) | 2016-01-18 | 2016-01-18 | Multiple directional control valve integrating return oil regeneration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028090.4A CN105545854A (en) | 2016-01-18 | 2016-01-18 | Multiple directional control valve integrating return oil regeneration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105545854A true CN105545854A (en) | 2016-05-04 |
Family
ID=55825294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610028090.4A Pending CN105545854A (en) | 2016-01-18 | 2016-01-18 | Multiple directional control valve integrating return oil regeneration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105545854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032127A (en) * | 2020-09-21 | 2020-12-04 | 浙江高宇液压机电有限公司 | Compound linkage multi-way valve of open center system and hydraulic control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006336846A (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd | Fluid pressure circuit |
| CN2878758Y (en) * | 2005-08-19 | 2007-03-14 | 许自进 | Integrated multi-change valve for loader |
| US20090308068A1 (en) * | 2004-12-28 | 2009-12-17 | Shin Caterpillar Mitsubishi Ltd | Control circuit for construction machine |
| CN103133446A (en) * | 2013-01-30 | 2013-06-05 | 浙江海宏液压科技股份有限公司 | Valve rod of multi-path valve and multi-path valve with valve rod |
| CN203685741U (en) * | 2014-01-20 | 2014-07-02 | 浙江高宇液压机电有限公司 | Multi-path reversing valve with oil return regeneration function |
| CN204163129U (en) * | 2014-08-15 | 2015-02-18 | 徐州徐工挖掘机械有限公司 | Excavator swing arm hydraulic cylinder flow regenerative system |
-
2016
- 2016-01-18 CN CN201610028090.4A patent/CN105545854A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090308068A1 (en) * | 2004-12-28 | 2009-12-17 | Shin Caterpillar Mitsubishi Ltd | Control circuit for construction machine |
| JP2006336846A (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd | Fluid pressure circuit |
| CN2878758Y (en) * | 2005-08-19 | 2007-03-14 | 许自进 | Integrated multi-change valve for loader |
| CN103133446A (en) * | 2013-01-30 | 2013-06-05 | 浙江海宏液压科技股份有限公司 | Valve rod of multi-path valve and multi-path valve with valve rod |
| CN203685741U (en) * | 2014-01-20 | 2014-07-02 | 浙江高宇液压机电有限公司 | Multi-path reversing valve with oil return regeneration function |
| CN204163129U (en) * | 2014-08-15 | 2015-02-18 | 徐州徐工挖掘机械有限公司 | Excavator swing arm hydraulic cylinder flow regenerative system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032127A (en) * | 2020-09-21 | 2020-12-04 | 浙江高宇液压机电有限公司 | Compound linkage multi-way valve of open center system and hydraulic control method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160504 |
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| WD01 | Invention patent application deemed withdrawn after publication |