CN205823776U - A kind of Multi-path electricity hydraulic control valve using oil return pressure reduction to make pilot control - Google Patents
A kind of Multi-path electricity hydraulic control valve using oil return pressure reduction to make pilot control Download PDFInfo
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- CN205823776U CN205823776U CN201620776732.4U CN201620776732U CN205823776U CN 205823776 U CN205823776 U CN 205823776U CN 201620776732 U CN201620776732 U CN 201620776732U CN 205823776 U CN205823776 U CN 205823776U
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Abstract
This utility model relates to a kind of Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control, including inlet valve group, oil return pressure regulator valve group, multiple electro-hydraulic reversing valve groups of being located between inlet valve group and oil return pressure regulator valve group；It is equipped with public oil inlet passage, middle position unloading channel and two-way drainback passage in the valve body of inlet valve group, multiple electro-hydraulic reversing valve group and oil return pressure regulator valve group, and public oil inlet passage and the parallel connection respectively of public drainback passage communicate, middle position unloading channel uses series connection oil channel structures；Being equipped with guide's oil cylinder in the end cap of multiple electro-hydraulic reversing valve groups, one end of the commutation main valve plug of each electro-hydraulic reversing valve group is connected with guide's oil cylinder coaxial cooperation respectively；Each electro-hydraulic reversing valve group is all integrated with electromagnetic priority valve；In the drainback passage of oil return pressure regulator valve group, it is provided with pilot pressure governor, forms the definite value pressure reduction of 2-3Mpa in its overfall front and back end.This utility model disclosure satisfy that the safety guarantee requirement of the equipment under the remote control to hydraulic machinery and case of emergency or personnel, reduces pipeline and oil sources configuration.
Description
Technical field
This utility model belongs to hydraulic machinery, is specifically related to a kind of Multi-path electricity hydraulic control using oil return pressure reduction to make pilot control
Valve processed.
Background technology
The manipulation control mode that duplex electro hydraulic reversal valve is used the most both at home and abroad has: the hydraulic control of external control pilot control
Handle reversing mode；Controlling commutation at the external electromagnetic valve in the one or both ends outside valve body main valve plug, pilot control is carried by outside
Supply；On oil input channel, shunt pressure oil is transported to the electromagnetic priority valve of each reversal valve group after decompression and makees pilot control oil sources and make
With；Shunting a small amount of pressure oil from the oil inlet passage of each valve group, the pilot solenoid valve entering valve group rear end after decompression is made first
Lead control oil sources to use.
Existing problems:
(1) use the pilot control of external control, bring the configuration of hydraulic oil source and control departmental cost significantly to increase, often
Group valve group is both needed to external oil inlet and oil return pipeline.
(2) using the frame mode of the external electromagnetic valve of valve end, valve group volume increases many, installs and safeguards inconvenience, and
Need to configure pilot control, often group valve group is both needed to external oil inlet and oil return pipeline.
(3) mode using in-line shunting guide oil will lose part working flow, cause power loss, and make oil-feed
Flow divider group sets shunting decompression core assembly because of interior and cause structure complicated, and fault rate increases.Owing to shunt volume is by working connection pressure
Power change and oil temperature impact, therefore can cause the pressure between working connection and bleed off circuit and interfering of flow to affect steady
Qualitative.
(4) use the mode through shunting decompression offer pilot control inside valve group, shunting need to be increased in each valve group and subtract
Pressure function, causes each valve block structure complicated, and even array closes more fault rate substantially increases, and reliability reduces and is significantly increased
Cost.
Automatically controlled or remote manipulation, performance can be reliably conveniently realized again owing to section hydraulic machinery needs one is relatively inexpensive
Manual manipulation when stablizing and have emergent is with safing function, it is therefore desirable to a kind of reliability height of exploitation, stable performance,
Economical and practical, can the Multi-path electricity hydraulic control valve handled respectively of torch.
CN202149093U discloses " a kind of electro-hydraulic control Split multi-way valve ", including first be sequentially connected with, active gage,
Cauda and the solenoid directional control valve being connected with active gage, be wherein additionally provided with shunting decompression valve in described first, and this shunting subtracts
The oil-out of pressure valve is connected with the oil-in of solenoid directional control valve, and the control oil sources of certain pressure so can be provided to export, permissible
Effectively solve the pilot control problem of electro-hydraulic control.It provides the benefit that: owing to being additionally provided with shunting decompression valve in described first,
The oil-out of this shunting decompression valve is connected with the oil-in of solenoid directional control valve, and the control oil sources that so can provide certain pressure is defeated
Go out, it may not be necessary to extra control oil sources, effectively solve the pilot control problem of electro-hydraulic control, simultaneously structure the compactest,
Install the most very convenient.Certainly, this is a kind of good try of art.
Summary of the invention
The purpose of this utility model is to provide a kind of Multi-path electricity hydraulic control valve using oil return pressure reduction to make pilot control, its energy
The enough equipment met under the remote control to hydraulic machinery and case of emergency or the safety guarantee requirement of personnel, reduce pipeline and oil
Source configures, and the pressure loss is little, noiseless to the stability of the pressure of main working oil path, flow, and control structure is simple, installs, ties up
Protect simplicity.
A kind of Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control described in the utility model, including inlet valve
Group, oil return pressure regulator valve group, multiple electro-hydraulic reversing valve groups of being located between inlet valve group and oil return pressure regulator valve group, described inlet valve
Group, multiple electro-hydraulic reversing valve group and oil return pressure regulator valve group are connected as one by three double threaded screws and three nuts；Described
Be equipped with public oil inlet passage in the valve body of inlet valve group, multiple electro-hydraulic reversing valve group and oil return pressure regulator valve group, the off-load of middle position is led to
Road and two-way back oil road and guide's drainback passage, and public oil inlet passage and two-way drainback passage and guide's drainback passage are the most also
Connection communicates, and middle position unloading channel uses series connection oil circuit form；The most identical in each reversal valve body it is provided with guide's oil inlet passage, elder generation
Lead drainback passage, the first leader channel, the second leader channel；Described inlet valve group is provided with overflow valve, check valve and main pressure
Power surveys mouth C1；It is characterized in that: in the end cap of the plurality of electro-hydraulic reversing valve group, be equipped with guide's oil cylinder, each electro-hydraulic reversing valve group
One end of commutation main valve plug is connected with guide's oil cylinder coaxial cooperation respectively；Each electro-hydraulic reversing valve group is all integrated with electromagnetic pilot
Valve, be provided with in described electromagnetic priority valve pilot valve oil input channel, first pilot valve commutation oil duct, second pilot valve commutation oil duct and
Pilot valve back oil road；The pilot valve oil input channel phase of described guide's oil inlet passage and the electromagnetic priority valve in each electro-hydraulic reversing valve group
Logical；
In the drainback passage of described oil return pressure regulator valve group, it is provided with pilot pressure governor, is provided with in the rear end of this pilot pressure governor
Guide's pressure spring, and be provided with pilot pressure in the front end of this pilot pressure governor overfall and survey mouth C2, rear end and be provided with oil return pressure
Power surveys mouth C3, surveys at pilot pressure and is separately installed with Pressure gauge on mouth C2 and return pressure survey mouth C3.
Further, the plurality of electro-hydraulic reversing valve group at least includes " O " type function electro-hydraulic reversing valve group and/or at least
Including a Y-shaped function electro-hydraulic reversing valve group.
Further, the other end at the commutation main valve plug of described electro-hydraulic reversing valve group connects handlebar.
The described Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control, its plurality of electro-hydraulic reversing valve group by
2-10 " O " type function electro-hydraulic reversing valve group and/or Y-shaped function electro-hydraulic reversing valve group composition.
This utility model is by the pilot control arranged in internal control and electro-hydraulic dynamic and manual maneuverability pattern and commutation function is organic melts
Merging becomes one, and is that one collects exquisite outward appearance, high integration, manipulation is light, it is convenient to safeguard, applied widely, without adopting
With the torch integrated Multi-path electricity hydraulic control valve of external control oil sources.The behaviour of the wired or wireless remote control to hydraulic actuator can be realized
Vertical or adoption rate high-speed double electromagnet simple intelligentization controls, and can use manually handle reality when electro-hydraulic manipulation is broken down
Now control require or get rid of potential safety hazard, can be widely applied to various environmental sanitation machinery, aerial operation machine, highway maintenance machinery,
Tunnel machine, engineering machinery etc..
Propose the definite value pressure reduction utilizing pilot pressure governor to manufacture 2-3Mpa in drainback passage innovatively, this pressure reduction is made
Operating oil pressure for pilot control oil sources realizes the conversion to main reversing oil circuit, and pilot control fluid uses row side in internal control
Formula, manually can handle Multi-path electricity hydraulic control valve with automatically controlled, it is possible to meet the remote control to hydraulic machinery and case of emergency respectively
Under equipment or the safety guarantee requirement of personnel；The most external oil sources mode decreases a large amount of pipeline and oil sources configuration, installs, ties up
Protect more convenient；In-line shunting pilot control oil mode, has the pressure loss little relatively, loses (especially to little without working flow
The work efficiency impact of flow hydraulic machinery is the most important, such as minitype waste car, road sweeper, high-altitude operation vehicle etc.), to main work
The pressure of oil circuit, discharge stability are noiseless, and control structure is simple, the advantage of economical and efficient.Be applicable to environmental sanitation machinery, high-altitude is made
Industry machinery, boring mechanic, tunnel machine, engineering machinery etc. use particularity and the demand of hommization development of environment.
This utility model has the advantage that
(1) row pilot control function, the multichannel electro hydraulic valve of torch integrated control in internal control is integrated；
(2) 2-is formed in its overfall front and back end by the pilot pressure governor that is inserted on oil return pressure regulator valve group back oil road
The definite value pressure reduction of 3Mpa, the front end oil return that this has pressure difference energy is input in electromagnetic priority valve as pilot control oil sources
Realize the commutation to electro-hydraulic reversing valve group to switch.There is pressure energy loss little, lose without working flow, to main working oil path
Pressure, discharge stability are noiseless, and without diversion mechanism in valve, without Small Holes damping flow channel, oil circuit control is succinctly efficient, fault rate
Low；
(3) changing external electromagnetic pilot valve external pilot control oil mode, the structural volume brought is big, and pipeline connects
Many, mounting condition is limited, high in cost of production defect；
(4) in-line shunting guide oil mode is changed, will the loss part working flow (work to low discharge hydraulic machinery
Make efficiency impact bigger), and make oil-feed flow divider group set shunting decompression core assembly because of interior and cause structure complicated.And owing to dividing
The change of flow easy acceptor oil circuit pressure and oil temperature impact, can cause the pressure between working connection and Shunt Damping System oil duct (≤0.8mm)
Power, flow, contamination level of oil liquid interfere brought defect and higher fault rate.
(5) divide multiple integral to design in main reversing valve hole and pilot control runner on same valve body, make valve body oil circuit
More optimizing, integrated level is high, and the pressure loss is little, easy to assembly；
(6) it is designed as coaxially linking being integrated with main valve plug and mechanism of surging by Manual operation mechanism, compact conformation, handles
Power is little；
(7) when using electromagnetic priority valve instead electro-hydraulic proportional reducing valve, can be by the commutation of PLC programming Control commutation main valve plug
Speed, and then control the change of actuator movement speed；
(8) can one to ten even in be combined, meet wanting of the individually operated of multiple executive component or the linkage of many mechanisms
Ask.
Accompanying drawing explanation
Fig. 1 is contour structures schematic diagram of the present utility model；
Fig. 2 is the A direction view of Fig. 1；
Fig. 3 is the B direction view of Fig. 1；
Fig. 4 is the D-D sectional view of Fig. 1；
Fig. 5 is the E-E sectional view of Fig. 1；
Fig. 6 is the F-F sectional view of Fig. 1；
Fig. 7 is the H-H sectional view of Fig. 6；
Fig. 8 is the G-G sectional view of Fig. 6；
Fig. 9 is hydraulic schematic diagram of the present utility model.
In figure: 1-inlet valve group, 2-" O " type function electro-hydraulic reversing valve group, 3-Y-shaped function electro-hydraulic reversing valve group,
4-oil return pressure regulator valve group, 5-pilot pressure governor, 6-double threaded screw, 7-nut, 8-overflow valve, 9-handlebar, 10-master
Oil input channel, 11-electromagnetic priority valve, the public oil inlet passage of 12-, position unloading channel in 13-, 14-two-way back oil road, 15-is mono-
To valve, 16-guide's oil cylinder, 17-commutates main valve plug, and 18-guide's oil inlet passage, 19-pilot valve oil input channel, 20-first is first
Pilot valve commutation oil duct, 21-the second pilot valve commutation oil duct, 22-pilot valve back oil road, 23-guide's drainback passage, 24-guide
Pressure spring, 25-back-moving spring, 26-overflow main valve plug, 27-the first leader channel, 28-the second leader channel, C1-principal pressure
Surveying mouth, C2-pilot pressure surveys mouth, and C3-return pressure surveys mouth.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is further described.
See a kind of Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control shown in Fig. 1 to Fig. 6, including oil-feed
Valve group 1, oil return pressure regulator valve group 4, multiple electro-hydraulic reversing valve groups of being located between inlet valve group and oil return pressure regulator valve group, described oil-feed
Valve group, multiple electro-hydraulic reversing valve group and oil return pressure regulator valve group are connected as one by three double threaded screws 6 and three nuts 7；?
It is equipped with public oil inlet passage 12, middle position in the valve body of described inlet valve group, multiple electro-hydraulic reversing valve group and oil return pressure regulator valve group
Unloading channel 13 and two-way back oil road 14；Described inlet valve group 1 is provided with overflow valve 8, check valve 15 and principal pressure and surveys mouth C1,
Its prominent substantive distinguishing features is: be equipped with guide's oil cylinder 16, each electro-hydraulic commutation in the end cap of the plurality of electro-hydraulic reversing valve group
One end of the commutation main valve plug 17 of valve group is connected with guide's oil cylinder 16 coaxial cooperation respectively；In each electro-hydraulic reversing valve group the most integrated
There is electromagnetic priority valve 11, in described electromagnetic priority valve, be provided with pilot valve oil input channel the 19, first pilot valve commutation oil duct 20, second
Pilot valve commutation oil duct 21 and pilot valve back oil road 22；Described guide's oil inlet passage 18 is with the electromagnetism in each electro-hydraulic reversing valve group first
The pilot valve oil input channel 19 of pilot valve 11 communicates；
In the drainback passage of described oil return pressure regulator valve group 4, it is provided with pilot pressure governor 5, sets in the rear end of this pilot pressure governor
There is guide's pressure spring 24, and be provided with pilot pressure survey mouth in the front end (for upper end in figure) of this pilot pressure governor overfall
C2, rear end (for lower end in figure) are provided with return pressure and survey mouth C3, survey difference on mouth C2 and return pressure survey mouth C3 at pilot pressure
Pressure gauge is installed.
Regulate guide's pressure spring of described pilot pressure governor rear end, be allowed to pilot pressure governor overfall front end with
The definite value pressure reduction of 2-3Mpa is formed, by the survey being respectively provided with in the overfall front-end and back-end of pilot pressure governor between rear end
Pressure mouth installs Pressure gauge additional and measures；Using there is this definite value pressure difference energy front end oil return as pilot control oil sources through two-way back oil road
The guide's oil inlet passage arranged in reversal valve body is input to the pilot valve oil-feed of the electromagnetic priority valve each electro-hydraulic reversing valve group
In road.
The electric magnet controlling pilot solenoid valve 11 two ends is capable of the first pilot valve commutation oil duct 20 and the second pilot valve
Commutation oil duct 21 oil-feed, the conversion of circuit, by being arranged on the first leader channel 27 and the second guide in commutation valve body
Passage 28 controls the commutation campaign of the guide oil cylinder 16 coaxially connected with the commutation main valve plug 17 of electro-hydraulic reversing valve group, it is achieved main flow
The switching of amount passage；The oil return of guide's oil cylinder 16 commutates in valve body with being arranged on through the pilot valve back oil road 22 of electromagnetic priority valve 11
Guide's drainback passage 23 return to oil return pressure regulator valve group 4 overflow control mouth rear end and through oil return T mouth return fuel tank, formed
Whole pilot control oil circuit.
The plurality of electro-hydraulic reversing valve group at least includes " O " type function electro-hydraulic reversing valve group 2 and/or a Y-shaped
Function electro-hydraulic reversing valve group 3.
The other end of the commutation main valve plug 17 of described electro-hydraulic reversing valve group connects handlebar 9.When guide's oil circuit control goes out
During existing fault, the handle that can handle outer connection realizes the commutation function of valve group.
The plurality of electro-hydraulic reversing valve group by 2,3,4,5,6,7,8,9 or 10 " O " type function electro-hydraulic reversing valve groups 2 and/
Or Y-shaped function electro-hydraulic reversing valve group 3 is constituted.
The tool distributed by the two-way drainback passage 14 of multiple electro-hydraulic reversing valve groups of the overfall front end of pilot pressure governor 5
The guide oil having 2-3Mpa pressure enters the electromagnetic priority valve 11 being connected in each electro-hydraulic reversing valve group by guide's oil input channel 18
Pilot valve oil input channel 19 in, by controlling the commutation of high-speed double electromagnet electromagnetic pilot spool at electromagnetic priority valve 11 two ends, warp
First pilot valve commutation oil duct 20 and the second pilot valve commutation the entering or the switching of oil return line of oil duct 21, control electro-hydraulic with each respectively
The commutation of guide's oil cylinder 16 that commutation main valve plug 17 one end coaxial cooperation of reversal valve group connects, it is achieved turning of main platform flow channel
Change.The oil return of guide's oil cylinder 16 returns to be inserted into through pilot valve back oil road 22 and guide's drainback passage 23 of electromagnetic priority valve 11
The oil return T mouth of the overfall rear end of the pilot pressure governor 5 in oil return pressure regulator valve group 4, regulation pilot pressure governor 5 can change guide
The size of oil liquid pressure.
Pressure oil liquid enters into the multiple electricity using parallel connection type oil circuit to communicate from the inner flow passage of inlet valve group 1 through check valve 15
In the public oil inlet passage 12 of liquid reversal valve group and the middle position unloading channel 13 of employing tandem type oil circuit, changed with electro-hydraulic by control
Commutation motion to the commutation coaxially connected guide's oil cylinder 16 of main valve plug 17 of valve group realizes the switching to main platform flow channel, real
The pressure oil liquid of existing working flow enters executive component oil cylinder or hydraulic motor work, and what regulation was inserted in inlet valve group 1 overflows
The operating pressure of stream valve 8 adjustable system working connection.
Multiple integral is divided to design described electro-hydraulic reversing valve group main reversing valve hole, the oil circuit control of electromagnetic priority valve, will
Manual operation mechanism is designed as same union body with commutation main valve plug, makes valve body oil duct more optimize, and more compact structure assembles more square
Just.Inside nominal diameter by Multi-path electricity hydraulic control valve: 12mm, 18mm, its nominal flow rate is respectively as follows: 50L/min, 120L/min, public
Claim pressure: 25MPa, pilot control pressure 2-3Mpa.
The hydraulic principle of described pilot-operated type Multi-path electricity hydraulic control valve, sees Fig. 7.
Pilot-operated type Multi-path electricity hydraulic control valve described in this example is by inlet valve group 1, " O " type function electro-hydraulic reversing valve group 2, " Y "
Type function electro-hydraulic reversing valve group 3 and oil return pressure regulator valve group 4 form.
When this example is in neutral position, the pilot valve oil input channel 19 of all electromagnetic priority valves 11 is in closed state, first
The first leader channel 27 and the second leader channel 28 are passed through respectively through the first pilot valve commutation oil duct 20 He in two chambeies of Oil Guide cylinder 16
Second pilot valve commutation oil duct 21 communicates with pilot valve back oil road 22, and communicates with oil return T mouth through guide's drainback passage 23, makes elder generation
Two chambeies of Oil Guide cylinder 16 are in unloading condition, make commutation main valve plug 17 be in neutral position under the effect of back-moving spring 25.
The fluid of now oil pump output enters into each electricity using parallel connection type oil circuit to communicate from the hydraulic fluid port P of inlet valve group 1 through check valve 15
In the oil inlet passage 12 of liquid reversal valve group and the middle position unloading channel 13 of employing tandem type oil circuit, due to the main valve plug that respectively commutates
17 are in neutral position, and main flow i.e. middle position unloading channel 13 through each electro-hydraulic reversing valve group enters into oil return pressure regulator valve group 4
In runner, returning fuel tank through opening the overflow main valve plug 26 of pilot pressure governor 5 from oil return T mouth, now system is in 2-3Mpa's
Low-load unloading condition.
Electro-hydraulic reversing valve group operation principle:
One, " O " type function electro-hydraulic reversing valve group
Connecting electromagnetic priority valve 11 right-hand member electromagnet power supply, pilot control oil is through the second pilot valve commutation oil duct 21 and second
Leader channel 28 enters into the right chamber of the guide's oil cylinder 16 in " O " type function electro-hydraulic reversing valve group 2 end cap and promotes commutation main valve plug
17 motions to the left put in place, and the oil return in the left chamber of guide's oil cylinder 16 commutates oil duct 20 from electricity through the first leader channel 27 and the first pilot valve
The inside back oil road of magnetic pilot valve 11 through pilot valve back oil road 22 and guide's drainback passage 23 from the overflow main valve of pilot pressure governor 5
The rear end of core 26 returns fuel tank through oil return T mouth.Now the off-load oil circuit of neutral unloading channel 13 is cut off, from the P of inlet valve group 1
It is main from commutation through the public oil inlet passage 12 of reversal valve group that the pressure oil liquid that mouth enters opens the check valve 15 being arranged in valve group
The opening formed between spool 17 and main valve hole enters one end work of external executive component oil cylinder or hydraulic motor through hydraulic fluid port B1
Doing work in chamber, the oil return of executive component other end working chamber is back to two-way back oil road 14 through hydraulic fluid port A1 and opens pilot pressure governor 5
Overflow main valve plug 26 from oil return T mouth return fuel tank；
Connecting electromagnetic priority valve 11 left end electromagnet power supply, pilot control oil is through the first pilot valve commutation oil duct 20 and first
Leader channel 27 enters the left chamber of the guide's oil cylinder 16 in " O " type function electro-hydraulic reversing valve group 2 end cap and promotes commutation main valve plug 17
Moving right and put in place, the oil return in the right chamber of guide's oil cylinder 16 commutates oil duct 21 from electromagnetism through the second leader channel 28 and the second pilot valve
The inside back oil road of pilot valve 11 through pilot valve back oil road 22 and guide's drainback passage 23 from the overflow main valve plug of pilot pressure governor 5
The rear end of 26 returns fuel tank through T mouth.Now the off-load oil circuit of neutral unloading channel 13 is cut off, and enters from the P mouth of inlet valve group 1
Pressure oil liquid open the check valve 15 that is arranged in the valve group public oil inlet passage 12 through reversal valve group from commutation main valve plug 17
And the opening formed between main valve hole enters one end working chamber acting of external executive component oil cylinder or hydraulic motor through hydraulic fluid port A1,
The oil return of executive component other end working chamber is back to two-way back oil road 14 through hydraulic fluid port B1 and opens the overflow master of pilot pressure governor 5
Spool 26 returns fuel tank from oil return T mouth；
When " O " type function electro-hydraulic reversing valve group 2 is in neutral position, two chambeies of guide's oil cylinder 16 are respectively by first first
Pathway 27 and the second leader channel 28 commutate oil duct 20 and the second pilot valve commutation oil duct 21 and pilot valve through the first pilot valve
Back oil road 22 communicates, and communicates with oil return T mouth through guide's drainback passage 23, makes the guide's oil cylinder 16 being connected with the main valve plug 17 that commutates
Two chambeies be in unloading condition, now commutation main valve plug 17 under the effect of back-moving spring 25, the turnover of main actuator port lead to
Road is all closed, and connected executive component remains static.Main flow is through the middle position off-load of each electro-hydraulic reversing valve group
Passage 13 enters into the overflow main valve plug 26 opening pilot pressure governor 5 in the runner of oil return pressure regulator valve group 4 and returns oil from oil return T mouth
Case.
When guide's oil circuit control breaks down, the handlebar 9 that can handle external connection realizes the commutation function of valve group.
Two, Y-shaped function electro-hydraulic reversing valve group
Connecting electromagnetic priority valve 11 right-hand member electromagnet power supply, pilot control oil is through the second pilot valve commutation oil duct 21 and second
Leader channel 28 enters the right chamber of the guide's oil cylinder 16 in Y-shaped function electro-hydraulic reversing valve group 3 end cap and promotes commutation main valve plug 17
Motion to the left puts in place, and the oil return in the left chamber of guide's oil cylinder 16 commutates oil duct 20 from electromagnetism through first guide's oil duct 27 and the first pilot valve
The inside back oil road of pilot valve 11 through pilot valve back oil road 22 and guide's drainback passage 23 from the overflow main valve plug of pilot pressure governor 5
The rear end of 26 returns fuel tank through oil return T mouth.Now the off-load oil circuit of neutral unloading channel 13 is cut off, from the P mouth of inlet valve group 1
The pressure oil liquid entered opens the check valve 15 that is arranged in the valve group public oil inlet passage 12 through reversal valve group from commutation main valve
The opening formed between core 17 and main valve hole enters external executive component oil cylinder or one end working chamber of hydraulic motor through hydraulic fluid port B2
Acting, the oil return of executive component other end working chamber is back to two-way back oil road 14 through hydraulic fluid port A2 and opens pilot pressure governor 5
Overflow main valve plug 26 returns fuel tank from oil return T mouth；
Connecting electromagnetic priority valve 11 left end electromagnet power supply, pilot control oil is through the first pilot valve commutation oil duct 20 and first
Guide's oil duct 27 enters the left chamber of the guide's oil cylinder 16 in Y-shaped function electro-hydraulic reversing valve group 3 end cap and promotes commutation main valve plug 17
Moving right and put in place, the oil return in the right chamber of guide's oil cylinder 16 commutates oil duct 21 from electromagnetism first through second guide's oil duct 28 and the second guide
The inside back oil road of pilot valve 11 through pilot valve back oil road 22 and guide's drainback passage 23 from the overflow main valve plug 26 of pilot pressure governor 5
Rear end oil return T mouth return fuel tank.Now the off-load oil circuit of neutral unloading channel 13 is cut off, and enters from the P mouth of inlet valve group 1
Pressure oil liquid open the check valve 15 that is arranged in the valve group oil inlet passage 12 through reversal valve group from commutation main valve plug 17 with main
The opening formed between valve opening enters one end working chamber acting of external executive component oil cylinder or hydraulic motor through hydraulic fluid port A2, performs
The oil return of element other end working chamber is back to two-way back oil road 14 through hydraulic fluid port B2 and opens the overflow main valve plug of pilot pressure governor 5
26 return fuel tank from oil return T mouth；
When " Y " type function electro-hydraulic reversing valve group 3 be in neutral position time, two chambeies of guide's oil cylinder 16 are respectively by first first
Pathway 27 and the second leader channel 28 commutate oil duct 20 and the second pilot valve commutation oil duct 21 and pilot valve through the first pilot valve
Back oil road 22 communicates, and communicates with oil return T mouth through guide's drainback passage 23, makes the guide oil being connected with the main valve plug 17 that commutates
Two chambeies of cylinder 16 are in unloading condition, and now commutation main valve plug 17 is under the effect of back-moving spring 25, A2 actuator port, B2 work
The passage making hydraulic fluid port communicates with two-way back oil road 14, and connected executive component is in quick condition and (singly goes out rod oil cylinder then
It is in low speed differential state).Main flow enters into oil return pressure regulator valve group 4 through the middle position unloading channel 13 of each electro-hydraulic reversing valve group
The overflow main valve plug 26 opening pilot pressure governor 5 in runner returns fuel tank from oil return T mouth.
When guide's oil circuit control breaks down, the handlebar 9 that can handle external connection realizes the commutation function of valve group.
Claims (4)
1. utilize oil return pressure reduction to make a Multi-path electricity hydraulic control valve for pilot control, including inlet valve group (1), oil return pressure regulator valve group
(4), multiple electro-hydraulic reversing valve groups of being located between inlet valve group and oil return pressure regulator valve group, described inlet valve group, multiple electro-hydraulic change
Connected as one by three double threaded screws (6) and three nuts (7) to valve group and oil return pressure regulator valve group；At described inlet valve
Public oil inlet passage (12), middle position unloading channel it is equipped with in the valve body of group, multiple electro-hydraulic reversing valve group and oil return pressure regulator valve group
And two-way drainback passage (14) (13), and public oil inlet passage (12) and two-way drainback passage (14) parallel connection respectively communicate, in
Position unloading channel (13) uses series connection oil circuit form；Guide's oil inlet passage (18), guide's drainback passage it is additionally provided with in valve body
(23), the first leader channel (27), the second leader channel (28)；Described inlet valve group (1) is provided with overflow valve (8), unidirectional
Valve (15) and principal pressure survey mouth C1；It is characterized in that: in the end cap of the plurality of electro-hydraulic reversing valve group, be equipped with guide's oil cylinder (16),
One end of the commutation main valve plug (17) of each electro-hydraulic reversing valve group is connected with guide's oil cylinder (16) coaxial cooperation respectively；Electro-hydraulic change each
In valve group, all it is integrated with electromagnetic priority valve (11), in described electromagnetic priority valve, is provided with pilot valve oil input channel (19), the first elder generation
Pilot valve commutation oil duct (20), the second pilot valve commutation oil duct (21) and pilot valve back oil road (22)；Described guide's oil inlet passage
(18) the pilot valve oil input channel (19) with the electromagnetic priority valve (11) in each electro-hydraulic reversing valve group communicates；
In the drainback passage of described oil return pressure regulator valve group (4), it is provided with pilot pressure governor (5), sets in the rear end of this pilot pressure governor
There is guide's pressure spring (24), and be provided with in the front end of this pilot pressure governor overfall that pilot pressure surveys mouth C2, rear end is provided with
Return pressure surveys mouth C3, surveys at pilot pressure and is separately installed with Pressure gauge on mouth C2 and return pressure survey mouth C3.
The Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control the most according to claim 1, is characterized in that: described
Multiple electro-hydraulic reversing valve groups at least include " O " type function electro-hydraulic reversing valve group (2) and/or Y-shaped function is electro-hydraulic changes
To valve group (3).
The Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control the most according to claim 1 and 2, is characterized in that:
The other end at the commutation main valve plug (17) of described electro-hydraulic reversing valve group connects handlebar (9).
The Multi-path electricity hydraulic control valve utilizing oil return pressure reduction to make pilot control the most according to claim 1 and 2, is characterized in that:
The plurality of electro-hydraulic reversing valve group is by 2-10 " O " type function electro-hydraulic reversing valve group (2) and/or Y-shaped function electro-hydraulic reversing valve
Group (3) is constituted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620776732.4U CN205823776U (en) | 2016-07-21 | 2016-07-21 | A kind of Multi-path electricity hydraulic control valve using oil return pressure reduction to make pilot control |
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| CN201620776732.4U CN205823776U (en) | 2016-07-21 | 2016-07-21 | A kind of Multi-path electricity hydraulic control valve using oil return pressure reduction to make pilot control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971964A (en) * | 2016-07-21 | 2016-09-28 | 泸州众大科技液压件有限公司 | Multiway electro-hydraulic control valve adopting oil return differential pressure as pilot oil source |
| CN109114254A (en) * | 2018-09-19 | 2019-01-01 | 合肥长源液压股份有限公司 | A kind of valve group to work in series and parallel for high-low pump and multi-way valve |
-
2016
- 2016-07-21 CN CN201620776732.4U patent/CN205823776U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971964A (en) * | 2016-07-21 | 2016-09-28 | 泸州众大科技液压件有限公司 | Multiway electro-hydraulic control valve adopting oil return differential pressure as pilot oil source |
| CN105971964B (en) * | 2016-07-21 | 2018-04-03 | 泸州众大科技液压件有限公司 | A kind of multichannel electric hydraulic control valve for making pilot control using oil return pressure difference |
| CN109114254A (en) * | 2018-09-19 | 2019-01-01 | 合肥长源液压股份有限公司 | A kind of valve group to work in series and parallel for high-low pump and multi-way valve |
| CN109114254B (en) * | 2018-09-19 | 2024-01-19 | 合肥长源液压股份有限公司 | Valve group and multi-way valve for serial-parallel operation of high-pressure pump and low-pressure pump |
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