CN108916149A - A kind of hydraulic multitandem valve and the hydraulic control system equipped with the multi-way valve - Google Patents
A kind of hydraulic multitandem valve and the hydraulic control system equipped with the multi-way valve Download PDFInfo
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- CN108916149A CN108916149A CN201811012424.4A CN201811012424A CN108916149A CN 108916149 A CN108916149 A CN 108916149A CN 201811012424 A CN201811012424 A CN 201811012424A CN 108916149 A CN108916149 A CN 108916149A
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- 239000012530 fluid Substances 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000008450 motivation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001953 sensory effect Effects 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
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
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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
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
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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)
- Multiple-Way Valves (AREA)
Abstract
A kind of hydraulic multitandem valve and the hydraulic control system equipped with the multi-way valve.Solving existing hydraulic multitandem valve can only compensate simultaneously, so that the problem of system pressure loss is big, and energy consumption is high.It includes control unit and hydraulic multitandem valve, the hydraulic multitandem valve includes valve body and valve rod, the valve body is equipped with the first actuator port, second actuator port, oil inlet, oil return opening and mounting hole, the first spool and the second spool are equipped in the mounting hole, first spool is set between oil inlet and the first actuator port and is separated out the first cavity on valve body with valve rod mutual cooperation, second spool is set between oil inlet and the second actuator port and is separated out the second cavity on valve body with valve rod mutual cooperation, the valve body is equipped with for choosing the feedback hydraulic fluid port by pressure oil at pressure oil at the first spool or the second spool.The advantages that present invention also has structure simple, easy to assembly, reliable in action, long service life.
Description
Technical field
The present invention relates to a kind of hydraulic control systems, and in particular to a kind of hydraulic multitandem valve and equipped with the hydraulic of the multi-way valve
Control system.
Background technique
Hydraulic multitandem valve is divided into open type center multi-way valve and enclosed center multi-way valve.Open type center multi-way valve is in commutation valve rod
When not commutating, the oil liquid of oil pump flows through T mouthfuls of oil return by multi-way valve commutation valve rod；Enclosed center multi-way valve does not have in commutation valve rod
When having commutation, commutation valve rod is that no oil liquid passes through, and if it is the constant outputs oil sources such as gear pump, oil liquid passes through threeway at this time
Compensating spool flows to T mouthfuls with certain constant pressure, if it is variable pump etc., then maintains always by the stroking mechanism of oil pump
Intimate zero-displacement condition.
The enclosed center most common system of multi-way valve is to form load sensitive system with constant displacement pump or load sensitive pump, and bear
Carry sensory system on a large scale, mass application.
In the case that multi-joint enclosed center multi-way valve is related to double acting work, more movement common actions, it is required to low-load
Work connection compensate, usually acquisition maximum load pressure light load pressure is compensated, to reach different loads
The purpose that work connection can work at the same time.Since hydraulic actuator has the hydraulic cylinder of linear motion, also there is rotary motion
Hydraulic motor.Oil cylinder generally all includes two movements of stretching and contract of oil cylinder, and motor includes being rotated both clockwise and counterclockwise for motor
Two movement, enclosed center multi-way valve commutation valve rod can by the displacement of left and right both direction control oil cylinder stretch, contract or
Two movements that person's motor is suitable, rotates counterclockwise.Conventional multiple valve typically is provided with feedback compensation function, but existing structure without
Method individually compensates two movements of oil cylinder or motor, and described can not refer to nothing to two movements progress separate compensations
For method to the flexible retraction row separate compensation stretched or stretched, being for motor can not be to the rotation clockwise or counter-clockwise of motor
Rotate into row separate compensation, i.e., so that product movement and when oil pressure being needed to compensate, need it is whole carry out repairing, without compensation
Movement is also due to the reason of structure, must compensate, and when oil return is not usually required to repairing, and oil return is to be without compensator
Direct oil return is carried out by valve rod, therefore system can be made the pressure loss is big at work, energy consumption is high.
Summary of the invention
It can only be compensated simultaneously to solve existing hydraulic multitandem valve in background technique, so that system pressure loss is big,
The problem of energy consumption is high, the present invention provide a kind of hydraulic multitandem valve and the hydraulic control system equipped with the multi-way valve.
The technical scheme is that：A kind of hydraulic multitandem valve, including valve body, valve rod and driving mechanism, the driving
Mechanism is connected with valve rod and is used for driving stem to be slid in valve body, and the valve body is equipped with the first actuator port, second
Actuator port, oil inlet, oil return opening and mounting hole, are equipped with the first spool and the second spool in the mounting hole, and described the
One spool is set between oil inlet and the first actuator port and is separated out the first cavity on valve body with valve rod mutual cooperation, described
Second spool is set between oil inlet and the second actuator port and is separated out the second cavity on valve body with valve rod mutual cooperation, described
Valve rod have so that be connected by the first spool, the first cavity with the first actuator port first of the pressure oil of oil inlet
It sets, the second position ended at middle position, so that the pressure oil of oil inlet passes through the second spool, the second cavity and the second working oil
The third place that mouth is connected, the valve body are equipped with for choosing by pressing at pressure oil at the first spool or the second spool
The feedback hydraulic fluid port of power oil.
As an improvement of the present invention, first spool, the second spool are arranged in parallel with valve rod, and described
One spool, the second spool are set in mounting hole and are separated out third cavity in mounting hole.
As a further improvement of the present invention, the third cavity passes through the first segment discharge orifice and first on the first spool
Cavity is connected, and the third cavity is connected by the second throttle orifice on the second spool with the second cavity.
As a further improvement of the present invention, inverted " C " font channel, the oil inlet are equipped at the oil inlet
Mouth is connected by " C " font channel, third cavity with the first cavity when valve rod is in first position, and the oil inlet exists
It is connected by " C " font channel, third cavity with the second cavity when valve rod is in the second position.
As a further improvement of the present invention, first spool includes cartridge cover and core, the cartridge cover with
Be equipped with spring cavity between core, be equipped with elastic component in the spring cavity, the both ends of the elastic component respectively with cartridge cover, core
Body offsets.
As a further improvement of the present invention, the core is equipped with check valve, the fuel feed hole of the check valve and the
One cavity is connected, and the oil outlet of the check valve is connected with feedback hydraulic fluid port, and the check valve is equipped with and spring cavity phase
The damping hole of connection.
As a further improvement of the present invention, the check valve includes valve ball and unidirectional valve deck, the unidirectional valve deck
It is fixed on core, unidirectional spring is equipped between the unidirectional valve deck and valve ball, the valve ball has so that check valve closes
The first position closed and the second position that check valve is opened, the unidirectional spring have so that valve ball tends to first position
Movement tendency.
As a further improvement of the present invention, the protrusion convex block radially outward of the core, the installation of the valve body
Shoulder block compatible with convex block, the core and valve body are equipped at hole in mounting hole axially upper sliding and position limitation cooperation.
As a further improvement of the present invention, the driving mechanism includes electric control reversing driving mechanism, liquid controlled reversing drive
Motivation structure or mechanical handling unidirectional driving mechanism.
A kind of hydraulic control system, including control unit and at least one is using described in any one of claim 1-9
Hydraulic multitandem valve, the control unit is equipped with main overflow valve, threeway recuperation valve and permanent flow valve, and the main overflow valve sets
For keeping system pressure constant between oil inlet, oil return opening；
Described three of them interface of threeway recuperation valve is connected with oil inlet, oil return opening, feedback hydraulic fluid port in constant displacement pump respectively
System pressure difference is kept when work；
The permanent flow valve is set between feedback hydraulic fluid port, oil return opening and is used for system unloaded when valve rod return.
The invention has the advantages that each multi-way valve uses two compensating spools, respectively to two of every multi-way valve
Actuator port carries out independent compensation, and structure is simple, easy to control, only needs to carry out actuator port repairing, pressure damage in work
It loses less, energy consumption is small, and multi-way valve of the present invention may act as the use of enclosed center multi-way valve, and it is more to can also be used as open type center
Road valve uses, and is a kind of multi-functional multi-way valve.The present invention also has structure simple, easy to assembly, reliable in action, service life
The advantages that long.
Detailed description of the invention
Attached drawing 1 is structural schematic diagram when one valve rod 22 of the embodiment of the present invention is in first position.
Attached drawing 2 is structural schematic diagram when one valve rod 22 of the embodiment of the present invention is in the second position.
Attached drawing 3 is structural schematic diagram when one valve rod 22 of the embodiment of the present invention is in the third place.
Attached drawing 4 is the hydraulic schematic diagram of the embodiment of the present invention one.
Attached drawing 5 is the structure enlargement diagram in attached drawing 2 at I.
Attached drawing 6 is the structural schematic diagram of the embodiment of the present invention two.
Attached drawing 7 is the structural schematic diagram of the embodiment of the present invention three.
In figure, 1, control unit；2, hydraulic multitandem valve；21, valve body；211, mounting hole；212, shoulder block；22, valve rod；23,
Driving mechanism；24, the first spool；241, cartridge cover；242, core；2421, convex block；243, spring cavity；244, elastic component；245,
First segment discharge orifice；25, the second spool；251, the second throttle orifice；26, the first cavity；27, the second cavity；28, third cavity；29,
Check valve；291, damping hole；292, valve ball；293, unidirectional valve deck；294, unidirectional spring；3, main overflow valve；4, threeway recuperation valve；
5, permanent flow valve；6, " C " font channel；7, safety overflow valve；A, the first actuator port；B, the second actuator port；P, oil inlet；T,
Oil return opening；LS, feedback hydraulic fluid port.
Specific embodiment
Embodiments of the present invention is further illustrated with reference to the accompanying drawing：
As shown in Fig. 1 combination Fig. 2-7, a kind of hydraulic multitandem valve, including valve body 21, valve rod 22 and driving mechanism 23, specifically,
Driving mechanism 23 is an assembly, includes spring end shield, proportional pressure-reducing valve, Limit screw, commutation reset spring etc., the drive
Motivation structure 23 is connected with valve rod and is used for driving stem to be slid in valve body, and specifically, driving mechanism is to pass through locating cover
It is connected with valve rod.The valve body 21 be equipped with the first actuator port A, the second actuator port B, oil inlet P, oil return inlet T and
Mounting hole 211, is equipped with the first spool 24 and the second spool 25 in the mounting hole, first spool be set to oil inlet with
The first cavity 26 is separated out on valve body between first actuator port and with valve rod mutual cooperation, second spool is set to oil inlet
Mouthful be separated out the second cavity 27 on valve body between the second actuator port and with valve rod mutual cooperation, the valve rod have so that
The first position that the pressure oil of oil inlet is connected by the first spool, the first cavity with the first actuator port is cut at middle position
The second position only so that the pressure oil of oil inlet be connected by the second spool, the second cavity with the second actuator port the
Three positions, the valve body are equipped with for choosing the feedback oil by pressure oil at pressure oil at the first spool or the second spool
Mouth LS.Specifically, the present invention can be used in crane hydraulic control system, naturally it is also possible to be used for other hydraulic control systems
In, in order to which safety overflow valve 7 can be arranged in safety at the first actuator port A, the second actuator port B, greatly improve each
The security performance of multi-way valve.In the actual production process, safety overflow valve is available, can not have to, and can also be changed to Fill valve etc..
More specifically, valve rod described when valve rod is in right position is in first position, valve rod is in valve rod described when left position
In the third place.When valve rod is in first position, the second actuator port B is connected with oil return inlet T, the second cavity at this time
It is not connected to the second actuator port, when valve rod is in the third place, the first actuator port A is connected with oil return inlet T, at this time
First cavity is not connected to the first actuator port, so that only mending to actuator port when compensating spool needs work
It repays, 1, compensation independence：A or B mouthfuls of separate compensation, oil return can be needed not compensate for；It 2, can be with if you do not need to compensation
It could be used without the accessory of compensation characteristic.Without being compensated to the hydraulic fluid port being connected with oil return opening, so that system pressure loss is small,
Energy consumption is small.The invention has the advantages that each multi-way valve uses two compensating spools, respectively to two works of every multi-way valve
Make hydraulic fluid port and carry out independent compensation, structure is simple, easy to control, only needs the A compensated needs in work or B mouthfuls are mended
It repays, the pressure loss is few, and energy consumption is small, and multi-way valve of the present invention may act as the use of enclosed center multi-way valve, can also be used as
Open type center multi-way valve uses, and is a kind of multi-functional multi-way valve.The present invention also has structure simple, easy to assembly, and movement can
It leans on, the advantages that long service life.It is usually to need to mend the actuator port being connected in work connection with oil inlet in work
Oil, and do not have to the actuator port being connected for oil return opening and carry out repairing.
First spool 24, the second spool 25 are arranged in parallel with valve rod 22, first spool, the second spool
Third cavity 28 is separated out in mounting hole and in mounting hole.First spool and the second spool disposed in parallel are easy for installation,
Balance quality is good, easy to process.
The third cavity 28 is connected by the first segment discharge orifice 245 on the first spool 24 with the first cavity, described
Third cavity be connected by the second throttle orifice 251 on the second spool 25 with the second cavity.Can make in this way the first spool,
Second spool is reliably opened, and carries out fuel feeding with after valve rod commutation convenient for quickly compensating, so that system response is fast.
Inverted " C " font channel 6 is equipped at the oil inlet, the oil inlet is when valve rod is in first position
It is connected by " C " font channel, third cavity with the first cavity, the oil inlet passes through when valve rod is in the second position
" C " font channel, third cavity are connected with the second cavity.Specifically, the oil inlet is in first position in valve rod
When be connected by the right side in " C " font channel with third cavity, the oil inlet passes through when valve rod is in the third place
The left side in " C " font channel is connected with third cavity.Working oil can be connected to according to actuator port with two-way oil inlet in this way
Throttling grooves structure is arranged in the concrete condition of cylinder chamber and rodless cavity, so that stem structure is easy to process, valve rod specific structure is not
It is restricted, easy to process, control precision is high.
First spool 24 includes cartridge cover 241 and core 242, is set between the cartridge cover 241 and core 242
Have a spring cavity 243, be equipped with elastic component 244 in the spring cavity, the both ends of the elastic component respectively with cartridge cover, core phase
It supports, the elastic component is spring.
The core is equipped with check valve 29, and the fuel feed hole of the check valve is connected with the first cavity 26, the list
It is connected to the oil outlet of valve with feedback hydraulic fluid port LS, the check valve is equipped with the damping hole being connected with spring cavity 243
291。
The check valve includes valve ball 292 and unidirectional valve deck 293, and the unidirectional valve deck is fixed on core, described
Unidirectional valve deck and valve ball between be equipped with unidirectional spring 294, the valve ball have so that the first position of closed check valve and
So that the second position that check valve is opened, the unidirectional spring has so that valve ball tends to the movement tendency of first position.
The convex block of protrusion radially outward 2421 of the core, is equipped at the mounting hole 211 of the valve body 21 and convex block
Compatible shoulder block 212, the core and valve body are in mounting hole axially upper sliding and position limitation cooperation.First spool carries one direction
Limiting device limits spool and continues the ability internally moved in valve body, so that product stable action, reliable.Certainly exist
In actual production process, the second valve core structure can be identical with the first valve core structure.
The driving mechanism 23 includes that electric control reversing driving mechanism, liquid controlled reversing driving mechanism or mechanical handling commutation are driven
Motivation structure.Such structure allows to commutate by different modes driving stem, and range of fit is wide.
A kind of hydraulic control system, including the above-mentioned hydraulic multitandem valve 2 of control unit 1 and at least one, the control
Unit 1 is equipped with main overflow valve 3, threeway recuperation valve 4 and permanent flow valve 5, and the main overflow valve 3 is set to oil inlet P, oil return inlet T
Between for keeping system pressure constant；
Described three of them interface of threeway recuperation valve 4 is connected with oil inlet P, oil return inlet T, feedback hydraulic fluid port LS for fixed respectively
System pressure difference is kept when measuring pump work；
The permanent flow valve 5 is set between feedback hydraulic fluid port LS, oil return inlet T and is used for system unloaded when 22 return of valve rod.More specifically
It says, two hydraulic multitandem valves is at least set in the hydraulic control system, the feedback hydraulic fluid port LS in hydraulic control system and every
Spring cavity 243 is connected, and when composite move, the compensating spool of high pressure connection picks up pressure oil and compensates the compensating spool joined to low pressure
Spring cavity realizes pressure compensation, and the compensation function only compensates actuator port, and compensation precisely, reduces energy consumption, pressure
Power loss is few.More specifically, the present invention can be used in the equipment such as crane.
Attached drawing 6 is that, using different driving methods, the difference of attached drawing 7 and attached drawing 1 is at spool from the difference of attached drawing 1
Structure it is different, i.e., if two actuator ports have, which is needed not compensate for or two need not compensate for, and can be used
Special craftsmanship accessory, does not compensate it, its advantage is that the pressure loss further decreases, calorific value is smaller, useless
Power loss is smaller；Check valve can also be placed at compensating spool simultaneously, compensation function is cancelled, and the work that load is kept only is played
With.
It is as follows to abbreviated functional description of the invention in conjunction with attached drawing 1-5：
1）, multi-way valve can pass through the side-to-side movement of commutation valve rod and realize two AB mouthfuls of actuator port of fuel feeding.When valve rod 22 to
When right movement, A mouthfuls of oil inlets, B mouthfuls of oil returns；When valve rod 22 moves downward, when B mouthfuls of oil inlets, A mouthfuls can be with oil return.
2）, multi-way valve include two end caps in left and right, suitable component is arranged on end cap, the following of multi-way valve may be implemented
Several reversing modes：
2.1）, electric control reversing：In left and right, control terminal covers the electric proportional pressure-reducing valve of arrangement, passes through the input of electric signal, control output
The size of pressure, and then the displacement of valve rod is controlled, realize the variation of A, B mouthfuls of output flows.
2.2）, liquid controlled reversing：In left and right, control terminal covers arrangement hydraulic control hydraulic fluid port, by the output pressure of hydraulic control guide's pressure reducing valve
Oil realizes the variation of A, B mouthfuls of output flows for driving commutation valve rod or so commutation.
2.3）, mechanical handling commutation：Commutation valve rod is by the driving of direct manual actuation or link mechanism so that commutation
Valve rod or so commutation, realizes the variation of AB mouthfuls of output flows.It is automatically controlled to be realized using electric control reversing driving mechanism shown in Fig. 1-5
Commutate arrangement.
3）, multi-way valve in two hydraulic fluid ports of A, B respectively arrange a safety overflow valve, A, B mouthfuls of maximum pressure is limited,
To prevent more than load maximum pressure.
4）, multi-way valve gather around there are two compensating spool, A, B mouthfuls of pressure is compensated respectively.
4.1）, when single movement, compensating spool not redeeming, under the action of dynamic balance be in a certain balance position
It sets；The built-in check valve for passing through compensating spool at this time, picks up load feedback oil PLs.
4.2）, when double acting work or more movement act together, when Ruo Benlian is that highest loads, execute function described in 4.1
Energy；When Ruo Benlian is low-load, the PLs picked up in 4.1 acts on the spring cavity of compensating spool, so that compensating spool is to low-load
Pressure compensate, realization while promoting composite move.
4.3）, when A mouthfuls of actuator port fuel-displaced, the first spool execute 4.1 or 4.2 shown in function, the second spool is not
Movement is in convex block 2421 and the state even at the cost of one's life of shoulder block 212 under the action of the spring；When B mouthfuls of actuator port are fuel-displaced, the second spool
Function described in 4.1 or 4.2 is executed, the first spool is failure to actuate.
First, second spool plays compensating action, while being also load feedback pick-up part, load feedback pressure oil
PLs passes to three-way pressure compensating device or load sensitive pump by inner passage, so that three-way flow divider valve（Threeway recuperation valve）
It is intended to close or load sensitive pump changes to huge discharge, and then output flow.
With reference to attached drawing 1-3,1）, point left and right sides oil circuit after P mouthfuls of oil inlets.2）, valve rod move right, the pressure of oil inlet P
Oil enters third cavity from the right side of " C " font channel, enters after the first cavity using the first spool and enters work by valve rod
Hydraulic fluid port A, while B mouthfuls of oil returns enter T mouthfuls.3）, valve rod be moved to the left, the pressure oil of oil inlet P enters from the left of " C " font channel
Third cavity enters after the second cavity using the second spool and enters actuator port B by valve rod, while A mouthfuls of oil returns enter T
Mouthful.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two
More than.
Every technical staff's notice：Although the present invention is described according to above-mentioned specific embodiment, of the invention
Invention thought be not limited in the invention, any repacking with inventive concept will all be included in this patent protection of the patent right
In range.
Claims (10)
1. a kind of hydraulic multitandem valve, including valve body, valve rod and driving mechanism, it is characterised in that:The driving mechanism and valve rod
Be connected and be used for driving stem and slid in valve body, the valve body be equipped with the first actuator port, the second actuator port, into
Hydraulic fluid port, oil return opening and mounting hole, are equipped with the first spool and the second spool in the mounting hole, first spool be set into
The first cavity is separated out on valve body between hydraulic fluid port and the first actuator port and with valve rod mutual cooperation, second spool is set to
The second cavity is separated out on valve body between oil inlet and the second actuator port and with valve rod mutual cooperation, and the valve rod has and makes
The first position that the pressure oil of oil inlet is connected by the first spool, the first cavity with the first actuator port is obtained, at middle position
The second position of cut-off, so that the pressure oil of oil inlet is connected by the second spool, the second cavity with the second actuator port
The third place, the valve body are equipped with for choosing the feedback by pressure oil at pressure oil at the first spool or the second spool
Hydraulic fluid port.
2. hydraulic multitandem valve according to claim 1, it is characterised in that first spool, the second spool are and valve rod
It is arranged in parallel, first spool, the second spool are set in mounting hole and are separated out third cavity in mounting hole.
3. hydraulic multitandem valve according to claim 2, it is characterised in that the third cavity passes through on the first spool
First segment discharge orifice is connected with the first cavity, and the third cavity passes through the second throttle orifice and the second cavity on the second spool
It is connected.
4. hydraulic multitandem valve according to claim 2, it is characterised in that be equipped with inverted " C " font at the oil inlet
Channel, the oil inlet are connected by " C " font channel, third cavity with the first cavity when valve rod is in first position
Logical, the oil inlet is connected by " C " font channel, third cavity with the second cavity when valve rod is in the second position.
5. hydraulic multitandem valve according to claim 1, it is characterised in that first spool includes cartridge cover and core,
It is equipped with spring cavity between the cartridge cover and core, is equipped with elastic component, the both ends of the elastic component in the spring cavity
It offsets respectively with cartridge cover, core.
6. hydraulic multitandem valve according to claim 5, it is characterised in that the core is equipped with check valve, described unidirectional
The fuel feed hole of valve is connected with the first cavity, and the oil outlet of the check valve is connected with feedback hydraulic fluid port, on the check valve
Equipped with the damping hole being connected with spring cavity.
7. hydraulic multitandem valve according to claim 5, it is characterised in that the check valve includes valve ball and unidirectional valve deck,
The unidirectional valve deck is fixed on core, and unidirectional spring, the valve ball tool are equipped between the unidirectional valve deck and valve ball
Have so that the first position of closed check valve and the second position for opening check valve, the unidirectional spring have so that valve
Ball tends to the movement tendency of first position.
8. hydraulic multitandem valve according to claim 5, it is characterised in that the protrusion convex block radially outward of the core,
Shoulder block compatible with convex block is equipped at the mounting hole of the valve body, the core and valve body slide limit in mounting hole axial direction
Position cooperation.
9. hydraulic multitandem valve according to claim 1, it is characterised in that the driving mechanism includes electric control reversing driving
Mechanism, liquid controlled reversing driving mechanism or mechanical handling unidirectional driving mechanism.
10. a kind of hydraulic control system, it is characterised in that：Appoint at least one using in claim 1-9 including control unit
Hydraulic multitandem valve described in meaning one, the control unit is equipped with main overflow valve, threeway recuperation valve and permanent flow valve, described
Main overflow valve is set between oil inlet, oil return opening for keeping system pressure constant；
Described three of them interface of threeway recuperation valve is connected with oil inlet, oil return opening, feedback hydraulic fluid port in constant displacement pump respectively
System pressure difference is kept when work；
The permanent flow valve is set between feedback hydraulic fluid port, oil return opening and is used for system unloaded when valve rod return.
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| CN201811012424.4A CN108916149B (en) | 2018-08-31 | 2018-08-31 | Hydraulic multi-way valve and hydraulic control system with same |
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| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
| CN112212032A (en) * | 2020-08-25 | 2021-01-12 | 武汉船用机械有限责任公司 | Multi-way valve |
| CN112431953A (en) * | 2020-12-30 | 2021-03-02 | 山西建工申华暖通设备有限公司 | Self-operated rising stem flow control valve with piston structure |
| CN113251174A (en) * | 2021-05-27 | 2021-08-13 | 徐州重型机械有限公司 | Multi-way valve and crane |
| CN114593237A (en) * | 2022-02-21 | 2022-06-07 | 南京福碧源环境技术有限公司 | Multi-way valve, water softener and control method of water softener |
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| CN114593237A (en) * | 2022-02-21 | 2022-06-07 | 南京福碧源环境技术有限公司 | Multi-way valve, water softener and control method of water softener |
| CN114593237B (en) * | 2022-02-21 | 2022-11-29 | 南京福碧源环境技术有限公司 | Multi-way valve, water softener and control method of water softener |
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