CN110230618A - Hydraulic control two way selected valve, load keep module and load holding system - Google Patents
Hydraulic control two way selected valve, load keep module and load holding system Download PDFInfo
- Publication number
- CN110230618A CN110230618A CN201910554729.6A CN201910554729A CN110230618A CN 110230618 A CN110230618 A CN 110230618A CN 201910554729 A CN201910554729 A CN 201910554729A CN 110230618 A CN110230618 A CN 110230618A
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- valve
- oil duct
- load
- hole
- valve body
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- 239000012530 fluid Substances 0.000 claims abstract description 8
- 239000002828 fuel tank Substances 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Classifications
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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
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention announces a kind of hydraulic control two way selected valve, load keeps module and load holding system, belongs to construction machinery hydraulic system technical field.The A1 hydraulic fluid port connection load of multi-way valve keeps the oil duct A of module；Load keeps the big chamber of oil duct B connection boom cylinder of module, and load keeps the oil duct DR connection fuel tank of module, and load keeps the lower demotion pilot pressure oil road of the oil duct Pi connection multi-way valve of module；The B1 hydraulic fluid port of the small chamber connection multi-way valve of boom cylinder.The present invention is using the area ratio of Cover Gasket and pilot valve in hydraulic control two way selected valve up to 1:64, and manipulation is simply, conveniently；Using the holding function of keeping valve, interior amount of leakage can be controlled is zero, ensure that load may remain in constant position and decline without changing with time；Phenomena such as by hydraulic control two way selected valve to keeping valve to play the role of pilot stage, make under the first pilot power of small poppet valve core frequently, be not in fracture.
Description
Technical field
The present invention relates to construction machinery hydraulic system technical field, specifically a kind of hydraulic control two way selected valve, load are kept
Module and load holding system, the load for executing agency are kept.
Background technique
Engineering machinery purposes is very extensive, and different purposes and complicated operating condition determine the complexity that its hydraulic system works
Property.The executive component of many hydraulic systems is required to keep constant in a certain position, common to have following scheme:
1, for requiring high-end and accurate hydraulic system to realize by balanced valve；
2, the fit clearance for controlling multipath valve rod and spool, is realized using the Median Function of multi-way valve；
3, executing agency increases hydraulic lock.
It is found in actual condition, above scheme has the following problems:
What scheme 1 was realized by the balanced valve in system, the high position of precision prescribed is accurate, suitable for high-altitude operation vehicle, stretches
The such engineering machinery of contracting arm forklift, less practical for medium and small tonnage digging machine and loading machine, cost is very
It is high；
Scheme 2 is a kind of very common scheme for medium and small tonnage digging machine and loading machine, passes through control valve rod and valve body
The fit clearance of centre bore indirectly controls leakage rate to realize.For theoretically, there are gaps there is leakage rate, exists
Leakage there is the decline of executive component at any time, and bad experience may be brought to user；If by between valve rod and valve body
Gap is done sufficiently small, and card valve is likely to occur in the action process of executing agency, is especially easy in a high voltage state to hydraulic
System brings failure, while may bring different degrees of damage to other elements of hydraulic system.For hydraulic valve itself
For, difficulty is brought to processing valve body and valve rod itself, increases difficulty to assembly, increases fault point to test, thus qualification rate
It will reduce.
Scheme 3 is inappropriate, the hydraulic lock possibility in the case where loading sufficiently large for the hydraulic system of frequent movement
It does not open, can not be accurately positioned, be easy to appear booster yet！It is small-sized for the one-way hydraulic lock with pilot control
Poppet valve core frequently opens and closes under high pressure is easy to cause poppet valve core to be broken.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of hydraulic control two way selected valve, load keeps module and load is protected
Hold system.
The invention is realized by the following technical scheme: a kind of hydraulic control two way selected valve, including end cap, is provided with step on end cap
Mounting hole, end cap sidewall are provided with oil duct a, oil duct b and the oil duct DR of connection step mounting hole；
Valve pocket is installed, end cap step installation outer end of hole is fixedly installed with valve body I in the end cap step mounting hole；
I axle center of valve body is provided with stepped hole, is sequentially installed with valve seat, Cover Gasket from outside to inside in I stepped hole of valve body；The valve
Seat is fixedly connected with valve body I, and valve seat axle center is provided with the oil duct Pi of perforation valve seat；The Cover Gasket is slidably matched with I stepped hole of valve body；
Spring I is installed between I stepped hole bottom of the Cover Gasket inner end and valve body；
Reversing valve core, reversing valve core upper end and valve sleeving inner wall are slidably fitted in the valve pocket as tapered surface cooperation；Reversing valve core
Spring II is installed between lower end and end cap step mounting hole bottom；
The valve pocket upper end is provided with the through-hole of connection reversing valve core upper end, is slidably fitted with pilot valve in valve pocket through-hole；It is described
The through-hole of valve pocket upper end is stretched out in pilot valve upper end, and pilot valve upper end is opposite with Cover Gasket；
When reversing valve core upper end and valve sleeving inner wall are fitted close, oil duct a, oil duct b connection；It is pushed when Cover Gasket pushes pilot valve
When valve sleeving inner wall tapered surface is left in reversing valve core upper end, oil duct a is connected to oil duct DR.
Preferred: I lower end of valve body is provided with external screw thread, and end cap step installation outer end of hole is provided with external screw thread；I lower end of valve body
It is connected through a screw thread and is mounted in end cap step mounting hole；It is installed in the end cap step and O is installed between outer end of hole and valve body I
Type circle III.
Preferred: the valve pocket upper end is equipped with the shelves platform of circumferential formula, and valve pocket shelves platform is against the platform in end cap step mounting hole
On rank；I lower end of valve body is pressed on the valve pocket shelves platform.
It is preferred: to be opened on the outer circumference surface of the valve pocket there are two mounting groove, two mounting grooves are lived apart the two of oil duct b
Side；O-ring I, retaining ring I are installed in the valve pocket mounting groove on the upside of the oil duct b, installed in the valve pocket mounting groove on the downside of oil duct b
There are O-ring II, retaining ring II.
Preferred: the valve seat lower end is provided with external screw thread, and I step outer end of hole of valve body is provided with external screw thread；Valve seat lower end passes through
Threaded connection is mounted in I stepped hole of valve body；O-ring IV is installed between the I step outer end of hole of valve body and valve seat.
A kind of load holding module, further includes a holding valve；
The holding valve includes valve body II, and oil duct c, oil duct d, oil duct A, oil duct B are provided on valve body II；The inner end the oil duct d with
Connection in the middle part of oil duct B, the inner end intersection of oil duct c, oil duct A, oil duct B；
The oil duct c is stepped hole, is sequentially installed with cover board in oil duct c from outside to inside, spring III, keeps spool；The cover board
Periphery and oil duct c inner wall are cooperatively connected, and cover board axle center is provided with through-hole, and cover board inner end offsets with step in oil duct c；The holding
Spool outer end is provided with blind hole, and III inner end of spring, which is located at, to keep in spool blind hole, and III outer end of spring is sleeved on the boss of cover board inner end
On；The holding spool inner end is tapered surface, and tapered surface cooperation in spool inner end is kept to be against the inner end oil duct A；Keep spool inner end
Periphery on be provided with a circle deep gouge, keep the deep gouge of spool inner end opposite with the inner end oil duct B；
The oil duct c is connected to the oil duct a of hydraulic control two way selected valve；
The oil duct d is connected to the oil duct b of hydraulic control two way selected valve.
Preferred: the cover board periphery is provided with mounting groove, and O-ring V, retaining ring V are equipped in cover board mounting groove.
Preferred: the outer end of oil duct a, oil duct b on the end cap same side are provided with mounting groove, outside oil duct a, oil duct b
O-ring VI is installed in the mounting groove at end；End cap sidewall is affixed with II side of valve body, is connected between end cap and valve body II by screw
It connects；Oil duct c, oil duct d and the outer end of oil duct a, oil duct b on II same side of valve body are connected to each other.
A kind of load holding system, further includes multi-way valve and boom cylinder；
The A1 hydraulic fluid port connection load of the multi-way valve keeps the oil duct A of module；The load keeps the oil duct B connection swing arm of module
The big chamber of oil cylinder, load keep the oil duct DR connection fuel tank of module, and load keeps the lower demotion of the oil duct Pi connection multi-way valve of module
Pilot pressure oil duct；The B1 hydraulic fluid port of the small chamber connection multi-way valve of the boom cylinder.
Compared with prior art, the beneficial effects of the present invention are:
1, using the area ratio of Cover Gasket and pilot valve in hydraulic control two way selected valve up to 1:64, it is meant that pilot pressure
3MPA can open the load that pressure is 192MPA, and manipulation is simply, conveniently；
2, using the holding function of keeping valve, to keeping valve to apply the control of side valve type pilot stage, simultaneously because hydraulic control two-way commutates
Have the sealing function of check valve in valve, interior amount of leakage can be controlled be zero, ensure that load may remain in constant position and
It does not change with time and declines；
3, by hydraulic control two way selected valve to keeping valve to play the role of pilot stage, make frequently to make under the first pilot power of small poppet valve core
With phenomena such as being not in fracture.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative examples and explanation are used to explain the present invention, and are not constituted improper limitations of the present invention.
Fig. 1 is the structural schematic diagram of one hydraulic control two way selected valve of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram that the load of the embodiment of the present invention two keeps module；
Fig. 3 is left view in Fig. 2；
Fig. 4 is the enlarged drawing that valve is kept in Fig. 2；
Fig. 5 is the structural schematic diagram that the embodiment of the present invention three loads holding system；
In figure: 1- valve seat；2-O type circle IV；3- Cover Gasket；4- spring I；5- valve body I；6 pilot valves；7-O type circle III；8- valve pocket；
9-O type circle VI；10-O type circle I；11- retaining ring I；12-O type circle II；13- retaining ring II；14- gasket；15- reversing valve core；16- spring
Ⅱ；17- end cap；18- valve body II；19- keeps spool；20 springs III；21- cover board；22-O type circle V；23- retaining ring V.
Specific embodiment
The following is specific embodiments of the present invention, and the present invention will be further described with reference to the accompanying drawings.
Embodiment one
As shown in connection with fig. 1, a kind of hydraulic control two way selected valve, end cap 17 are square, and 17 upper surface of end cap is provided with platform vertically downwards
Rank mounting hole, 17 left side of end cap are provided with oil duct a, the oil duct b of connection step mounting hole, and 17 right side of end cap is provided with connection step
The oil duct DR of mounting hole.
I 5 lower end of valve body is provided with external screw thread, and 17 step of end cap installation outer end of hole is provided with external screw thread, and I 5 lower end of valve body passes through spiral shell
Line connection is mounted in 17 step mounting hole of end cap, is installed in 17 step of end cap and is equipped with O-ring between outer end of hole and valve body I 5
Ⅲ7.I 5 axle center of valve body is provided with stepped hole, is sequentially installed with valve seat 1, Cover Gasket 3 from outside to inside in I 5 stepped hole of valve body.Valve seat 1
Axle center is provided with the oil duct Pi of perforation valve seat 1.1 lower end of valve seat is provided with external screw thread, and I 5 step outer end of hole of valve body is provided with external screw thread, valve seat
1 lower end, which is connected through a screw thread, to be mounted in I 5 stepped hole of valve body, is equipped between I 5 step outer end of hole of valve body and valve seat 1 O-shaped
Enclose IV 2.Cover Gasket 3 is slidably matched with I 5 stepped hole of valve body, is equipped with spring between I 5 stepped hole bottom of 3 inner end of Cover Gasket and valve body
Ⅰ4.Spring I 4 gives Cover Gasket 3 one power moved upwards, and 3 upper end of Cover Gasket is kept to offset with 1 lower end of valve seat.
Valve pocket 8 is mounted on 17 step mounting hole middle and lower part of end cap, and 8 upper end of valve pocket is equipped with the shelves platform of circumferential formula, 8 grades of platforms of valve pocket
It is against on the step in 17 step mounting hole of end cap, I 5 lower end of valve body is pressed on 8 grades of platforms of valve pocket, completes the positioning of valve pocket 8.Valve
It is opened on the outer circumference surface of set 8 there are two mounting groove, two mounting grooves are lived apart in the two sides of oil duct b；Valve pocket 8 on the upside of oil duct b is pacified
O-ring I 10, retaining ring I 11 are installed in tankage, O-ring II 12, retaining ring II are installed in 8 mounting groove of valve pocket on the downside of oil duct b
13。
Be slidably installed reversing valve core 15 in valve pocket 8, and 15 upper end of reversing valve core and 8 upper end inner wall of valve pocket are tapered surface cooperation.
15 lower end of reversing valve core is set with gasket 14, and gasket 14 is against on the step of 15 lower end of reversing valve core；Spring II 16, which is sleeved on, to be changed
To 15 lower end of spool, II 16 upper end of spring offsets with gasket 14, and II 16 lower end of spring offsets with 17 step mounting hole bottom surface of end cap.
Spring II 16 gives reversing valve core 15 1 power moved upwards, keeps end toper on 15 upper end tapered surface of reversing valve core and valve pocket 8
Face matches, and prevents the conducting with oil duct DR, is equivalent to the effect of check valve.
8 upper end of valve pocket is provided with the through-hole of connection 15 upper end of reversing valve core, is slidably fitted with pilot valve 6 in 8 through-hole of valve pocket.
The through-hole of 8 upper end of valve pocket is stretched out in 6 upper end of pilot valve, and 6 upper end of pilot valve and Cover Gasket 3 are opposite.When 15 upper end of reversing valve core with
When 8 inner wall of valve pocket is fitted close, oil duct a, oil duct b connection；When the logical oil of oil duct Pi, Cover Gasket 3 is pushed to glide, Cover Gasket 3 pushes guide
When spool 6 pushes 15 upper end of reversing valve core to leave 8 inner wall tapered surface of valve pocket, oil duct a is connected to oil duct DR.
Embodiment two
On the basis of the above embodiment 1, in conjunction with shown in Fig. 2 to Fig. 4, load keep module mainly by hydraulic control two way selected valve,
Keep valve group at.
Keeping valve includes rectangular valve body II 18.II 18 left side of valve body is provided with oil duct c, oil duct d, and II 18 upside of valve body is provided with
Oil duct B, II 18 right side of valve body are provided with oil duct A.It is connect in the middle part of the inner end oil duct d and oil duct B, the inner end of oil duct c, oil duct A, oil duct B
Intersection.
Oil duct c is stepped hole, is sequentially installed with cover board 21 in oil duct c from outside to inside, spring III 20, keeps spool 19.Lid
21 periphery of plate and oil duct c inner wall are cooperatively connected, and 21 periphery of cover board is provided with mounting groove, is equipped in 21 mounting groove of cover board O-shaped
Enclose V 22, retaining ring V 23.21 inner end of cover board offsets with step in oil duct c, realizes inner end positioning, and outer end relies on night sky two-way liquid
Control valve face limit.19 outer end of spool is kept to be provided with blind hole, III 20 inner end of spring, which is located at, to keep in 19 blind hole of spool, spring III 20
Outer end is sleeved on the boss of 21 inner end of cover board.Holding 19 inner end of spool is tapered surface, keeps 19 inner end tapered surface of spool on a left side
Under the action of the spring III 20 of side, cooperation is against the inner end oil duct A, realizes the cut-off of oil duct A.Keep the periphery of 19 inner end of spool
On be provided with a circle deep gouge, keep that the deep gouge of 19 inner end of spool is opposite with the inner end oil duct B, communicates.
The outer end of oil duct a, oil duct b on 17 side of end cap are provided with mounting groove, oil duct a, the outer end oil duct b mounting groove in pacify
Equipped with O-ring VI 9；17 side of end cap is affixed with II 18 side of valve body, is connected by screw between end cap 17 and valve body II 18, real
Oil duct c, oil duct d and the outer end of oil duct a, oil duct b on existing valve body II 18 are connected to each other.
Embodiment three
On the basis of above-described embodiment two, as shown in connection with fig. 5, load holding system include load keep module, multi-way valve and
Boom cylinder.The A1 hydraulic fluid port connection load of multi-way valve keeps the oil duct A of module；Load keeps the oil duct B connection swing arm oil of module
The big chamber of cylinder, load keep the oil duct DR connection fuel tank of module, and load keeps the lower demotion of the oil duct Pi connection multi-way valve of module first
Pilot power oil duct；The B1 hydraulic fluid port of the small chamber connection multi-way valve of boom cylinder.
Boom cylinder rises operating condition:
It is that raise-position gives pilot pressure on multi-way valve that boom cylinder, which rises, and multi-way valve principle moves right, and pressure oil is by multi-way valve P
Mouth keeps the A mouth of holding valve in module through A1 mouthfuls of multi-way valve to load, pushes the holding spool 19 kept in valve open, arrives load and keep
The B mouth that valve is kept in module pushes boom cylinder up to move subsequently into the big chamber of boom cylinder；
The small chamber oil of boom cylinder returns to T mouthfuls of fuel tank through B1 mouthfuls of multi-way valve simultaneously, forms oil circulation.
It only keeps keeping spool 19 in valve so can open, because the III 20 rigidity very little of spring of valve is kept, as long as having
Pressure is all larger than the power of spring III 20, while keeping the oil of spring cavity in valve by keeping the oil duct c of valve cover plate 21 to flow to liquid
The hole a of two way selected valve is controlled, the inner hole through reversing valve core 15 in hydraulic control two way selected valve flows to the hole b of hydraulic control two way selected valve,
By keeping the hole d of valve to communicate with the B mouth of valve is kept, oil circulation is formed.
Boom cylinder declines operating condition:
Boom cylinder decline is that demotion gives pilot pressure under multi-way valve, and multi-way valve principle is moved to the left, and pressure oil is by multi-way valve P
Mouth arrives the small chamber of boom cylinder through B1 mouthfuls of multi-way valve, and boom cylinder is pushed to move downward；Simultaneously boom cylinder big chamber to load
The B mouth for keeping valve in module is kept, the holding spool 19 in valve is kept to keep protecting in module because difference in areas is opened, and then to load
The A mouth of valve is held, then returns to T mouthfuls of fuel tank through A1 mouthfuls of multi-way valve, forms oil circulation.
Why keep the holding spool 19 in valve because difference in areas is opened, reason is the Pi in hydraulic control two way selected valve
Mouth connects demotion pilot pressure under multi-way valve, and the DR mouth connected tank in hydraulic control two way selected valve unloads oil leakaging port, its guide when decline
Pressure will push Cover Gasket 3 in hydraulic control two way selected valve, push pilot valve 6 through spring 4, and then reversing valve core 15 is transported downwards
It is dynamic, it is opened so that the unidirectional tapered surface of reversing valve core 15 and valve pocket 8 be sealed；
So keep the oil of spring cavity in valve by keeping the hole c of valve cover plate 21 to flow to the hole a of hydraulic control two way selected valve, through changing
DR mouthfuls of oil return boxes are flowed to the excessively unidirectional tapered surface sealing of 15 inner hole of spool；
So there are difference in areas to open for the holding spool 19 in holding valve；
Reversing valve core 15 moves downward in hydraulic control two way selected valve simultaneously, turns off reversing valve core 15 and the gear of valve pocket 8.
Boom cylinder keeps operating condition:
When boom cylinder is maintained at a certain constant position
Multi-way valve does not have pilot pressure, because of boom cylinder self weight and the inertia of weight down, the pressure of the big chamber of boom cylinder
It is transferred to load and keeps the B mouth for keeping valve in module, because keeping the promotion of spring 20 in valve that spool 19 is kept to form conical surface seal, make
Oil circuit can not be communicated with A mouthfuls；Simultaneously d mouthful, b mouthful, a mouthfuls and c mouthfuls communicate but because holding the oil-free liquid stream of 19 conical surface seal of spool move, together
When hydraulic control two way selected valve in the unidirectional tapered surface sealing of reversing valve core 15 and valve pocket 8 also oil-free liquid stream is dynamic, load it is bigger, herein
Sealing can be tighter；Because the area ratio of Cover Gasket and pilot valve in hydraulic control two way selected valve is 1:64, it is meant that pilot pressure
3MPA can open the load that pressure is 192MPA.
Claims (9)
1. a kind of hydraulic control two way selected valve, including end cap (17), it is provided with step mounting hole on end cap (17), end cap (17) side is opened
There are oil duct a, oil duct b and the oil duct DR of connection step mounting hole；
It is characterized by:
It is equipped with valve pocket (8) in end cap (17) the step mounting hole, end cap (17) step installation outer end of hole is fixedly installed with valve
Body I (5)；
Valve body I (5) axle center is provided with stepped hole, is sequentially installed with valve seat (1), lid from outside to inside in valve body I (5) stepped hole
It pads (3)；The valve seat (1) is fixedly connected with valve body I (5), and valve seat (1) axle center is provided with the oil duct Pi of perforation valve seat (1)；The lid
Pad (3) is slidably matched with valve body I (5) stepped hole；It is equipped between the Cover Gasket (3) inner end and valve body I (5) stepped hole bottom
Spring I (4)；
It is slidably fitted with reversing valve core (15) in the valve pocket (8), reversing valve core (15) upper end and valve pocket (8) inner wall are tapered surface
Cooperation；Spring II (16) is installed between reversing valve core (15) lower end and end cap (17) step mounting hole bottom；
Valve pocket (8) upper end is provided with the through-hole of connection reversing valve core (15) upper end, is slidably fitted with guide in valve pocket (8) through-hole
Spool (6)；The through-hole of valve pocket (8) upper end, pilot valve (6) upper end and Cover Gasket (3) phase are stretched out in pilot valve (6) upper end
It is right；
When reversing valve core (15) upper end and valve pocket (8) inner wall are fitted close, oil duct a, oil duct b connection；When Cover Gasket (3) push first
When guide valve core (6) pushes reversing valve core (15) upper end to leave valve pocket (8) inner wall tapered surface, oil duct a is connected to oil duct DR.
2. hydraulic control two way selected valve according to claim 1, it is characterised in that: valve body I (5) lower end is provided with outer spiral shell
Line, end cap (17) step installation outer end of hole are provided with external screw thread；Valve body I (5) lower end, which is connected through a screw thread, is mounted on end cap (17) platform
In rank mounting hole；It is installed in the end cap (17) step and O-ring III (7) is installed between outer end of hole and valve body I (5).
3. hydraulic control two way selected valve according to claim 2, it is characterised in that: valve pocket (8) upper end is equipped with circumferential formula
Shelves platform, valve pocket (8) shelves platform is against on the step in end cap (17) step mounting hole；Valve body I (5) lower end is pressed on described
On valve pocket (8) shelves platform.
4. hydraulic control two way selected valve according to claim 1, it is characterised in that: opened on the outer circumference surface of the valve pocket (8)
There are two mounting grooves, and two mounting groove separations are in the two sides of oil duct b；It is equipped in valve pocket (8) mounting groove on the upside of the oil duct b
O-ring I (10), retaining ring I (11) are equipped with O-ring II (12), retaining ring II (13) in valve pocket (8) mounting groove on the downside of oil duct b.
5. hydraulic control two way selected valve according to claim 1, it is characterised in that: valve seat (1) lower end is provided with external screw thread,
Valve body I (5) step outer end of hole is provided with external screw thread；Valve seat (1) lower end, which is connected through a screw thread, to be mounted in valve body I (5) stepped hole；?
O-ring IV (2) is installed between valve body I (5) the step outer end of hole and valve seat (1).
6. a kind of load using any hydraulic control two way selected valve of claim 1 to 5 keeps module, it is characterised in that:
It further include a holding valve；
The holding valve includes valve body II (18), and oil duct c, oil duct d, oil duct A, oil duct B are provided on valve body II (18)；The oil duct
It is connect in the middle part of the inner end d and oil duct B, the inner end intersection of oil duct c, oil duct A, oil duct B；
The oil duct c is stepped hole, is sequentially installed with cover board (21) in oil duct c from outside to inside, spring III (20), keeps spool
(19)；Cover board (21) periphery and oil duct c inner wall are cooperatively connected, and cover board (21) axle center is provided with through-hole, cover board (21) inner end
It offsets with step in oil duct c；Holding spool (19) outer end is provided with blind hole, and spring III (20) inner end, which is located at, keeps spool (19)
In blind hole, spring III (20) outer end is sleeved on the boss of cover board (21) inner end；The holding spool (19) inner end is tapered surface,
The cooperation of spool (19) inner end tapered surface is kept to be against the inner end oil duct A；It is heavy that a circle is provided on the periphery of holding spool (19) inner end
Slot keeps the deep gouge of spool (19) inner end opposite with the inner end oil duct B；
The oil duct c is connected to the oil duct a of hydraulic control two way selected valve；
The oil duct d is connected to the oil duct b of hydraulic control two way selected valve.
7. load according to claim 6 keeps module, it is characterised in that: cover board (21) periphery is provided with installation
Slot is equipped with O-ring V (22), retaining ring V (23) in cover board (21) mounting groove.
8. load according to claim 6 keeps module, it is characterised in that: the oil duct on end cap (17) same side
A, the outer end of oil duct b is provided with mounting groove, oil duct a, the outer end oil duct b mounting groove in O-ring VI (9) is installed；End cap (17) side
Face is affixed with valve body II (18) side, is connected by screw between end cap (17) and valve body II (18)；The valve body II (18) is same
Oil duct c, oil duct d and the outer end of oil duct a, oil duct b on one side are connected to each other.
9. a kind of keep the load of module to keep system using any load of claim 6 to 8, it is characterised in that:
It further include multi-way valve and boom cylinder；
The A1 hydraulic fluid port connection load of the multi-way valve keeps the oil duct A of module；The load keeps the oil duct B connection swing arm of module
The big chamber of oil cylinder, load keep the oil duct DR connection fuel tank of module, and load keeps the lower demotion of the oil duct Pi connection multi-way valve of module
Pilot pressure oil duct；The B1 hydraulic fluid port of the small chamber connection multi-way valve of the boom cylinder.
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| CN110230618B CN110230618B (en) | 2024-05-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879365A (en) * | 2021-01-19 | 2021-06-01 | 龙工（上海）精工液压有限公司 | Load holding valve for excavator |
| CN113124012A (en) * | 2021-04-06 | 2021-07-16 | 中联重科股份有限公司 | Load holding valve and construction machine |
| CN113898626A (en) * | 2021-08-31 | 2022-01-07 | 徐工集团工程机械股份有限公司 | Load holding device and load holding system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203176034U (en) * | 2013-02-04 | 2013-09-04 | 陕西航天动力高科技股份有限公司 | Volume changeable compact type overload oil supplement valve |
| CN204186666U (en) * | 2014-10-15 | 2015-03-04 | 浙江华益机械有限公司 | A kind of plug-in type load holding valve and hydraulic load retentive control system |
| CN104454736A (en) * | 2014-12-15 | 2015-03-25 | 山东华伟液压设备制造有限公司 | Load holding valve and running method thereof |
| CN104653537A (en) * | 2015-01-15 | 2015-05-27 | 四川长江液压件有限责任公司 | Lockable reversing valve |
| WO2015074170A1 (en) * | 2013-11-20 | 2015-05-28 | 江苏恒立液压有限公司 | Pressure compensation valve |
| CN105697828A (en) * | 2016-03-11 | 2016-06-22 | 柳州柳工液压件有限公司 | Hydraulic control one-way valve |
| CN210127987U (en) * | 2019-06-25 | 2020-03-06 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control two-way reversing valve and load holding module |
-
2019
- 2019-06-25 CN CN201910554729.6A patent/CN110230618B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203176034U (en) * | 2013-02-04 | 2013-09-04 | 陕西航天动力高科技股份有限公司 | Volume changeable compact type overload oil supplement valve |
| WO2015074170A1 (en) * | 2013-11-20 | 2015-05-28 | 江苏恒立液压有限公司 | Pressure compensation valve |
| CN204186666U (en) * | 2014-10-15 | 2015-03-04 | 浙江华益机械有限公司 | A kind of plug-in type load holding valve and hydraulic load retentive control system |
| CN104454736A (en) * | 2014-12-15 | 2015-03-25 | 山东华伟液压设备制造有限公司 | Load holding valve and running method thereof |
| CN104653537A (en) * | 2015-01-15 | 2015-05-27 | 四川长江液压件有限责任公司 | Lockable reversing valve |
| CN105697828A (en) * | 2016-03-11 | 2016-06-22 | 柳州柳工液压件有限公司 | Hydraulic control one-way valve |
| CN210127987U (en) * | 2019-06-25 | 2020-03-06 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control two-way reversing valve and load holding module |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879365A (en) * | 2021-01-19 | 2021-06-01 | 龙工（上海）精工液压有限公司 | Load holding valve for excavator |
| CN113124012A (en) * | 2021-04-06 | 2021-07-16 | 中联重科股份有限公司 | Load holding valve and construction machine |
| CN113898626A (en) * | 2021-08-31 | 2022-01-07 | 徐工集团工程机械股份有限公司 | Load holding device and load holding system |
| CN113898626B (en) * | 2021-08-31 | 2023-11-07 | 徐工集团工程机械股份有限公司 | Load holding device and load holding system |
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| Publication number | Publication date |
|---|---|
| CN110230618B (en) | 2024-05-28 |
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