CN208345604U - Closed system integrates switching valve - Google Patents
Closed system integrates switching valve Download PDFInfo
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- CN208345604U CN208345604U CN201820979133.1U CN201820979133U CN208345604U CN 208345604 U CN208345604 U CN 208345604U CN 201820979133 U CN201820979133 U CN 201820979133U CN 208345604 U CN208345604 U CN 208345604U
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Abstract
A kind of integrated switching valve of closed system.Solving existing switching valve cannot be adapted in big flow operating condition and work that there are calorific values is big, the problem shaken etc..It includes first pressure mouth, second pressure mouth, the first reversal valve, the second reversal valve, the first inserted valve, the second inserted valve, the first slide valve, the second slide valve and shuttle valve that it, which controls switching circuit, luffing control loop and expansion control loop, the control switching circuit,；The luffing control loop includes third inserted valve, third reversal valve, is exported by the evolution control system of reversal valve and inserted valve.The utility model has the beneficial effects that being used as power source using enclosed pump, it can driving hoisting system can also drive flexible, changing-breadth system, and composite move may be implemented using double pump system.The advantages that the utility model also has structure simple, easy to assembly, and reliable in action, crushing is few, small, the good seal performance of impact, zero leakage long service life.
Description
Technical field
The utility model relates to a kind of hydraulic control systems, and in particular to a kind of integrated switching valve of closed system.
Background technique
Hoister in large tonnage, especially 200 ton or more product, since power is big, flow is big, pressure is high, hoisting system one
As use closed system, system heat generation amount can be reduced to avoid throttle grverning bring crushing the characteristics of volumetric speed control.It is so-called
Volumetric speed control utilizes and carrys out control system speed to the adjusting of pumpage, this almost the same to the oil inlet and oil return of motor driving
The system of liter is highly beneficial.But hoister in large tonnage operating condition is complicated, in addition to the hoisting system of motor driving, there are also oil cylinder drivings
Flexible and changing-breadth system, this system are typically characterized in that oil inlet and oil return amount difference is very big, are generally controlled using open system,
But this, which is not represented, to be controlled using closed system, be that can use completely when suitably increasing part repairing function
What closed system was controlled.
Switch commutation function generally is realized with two-way logic inserted valve in engineering machinery big flow control system, this is because
Common commercial power magnet valve is no longer satisfied the big requirement of system through-current capacity, if using the through-flow big stream of general solenoid valve by force
Amount, the systemic problem such as high crushing, calorific value can be brought big.Engineering machinery large-flow hydraulic system often uses double pump or more pumps
System, each executive component determines according to demand provides flow using single pump or double pump, is just needed pair based on this demand
The oil feeding line of double pump or multiple pump opens and closes, to realize single pump, double pump or more oil pump feeds.
For Mass flow system, traditional switching valve mostly uses the reversal valve of two-way logic inserted valve cooperation pilot stage
Realize above-mentioned function, usually shared ABC tri- hydraulic fluid ports, when C mouthful logical high pressures, A can not be connected to B mouthfuls, realization cutoff function；
When C mouthfuls of pressure discharge, A and B mouthful are linked up, realization connectivity capabilities.In summary as can be seen that two-way commutation logic inserts
Valve essence is a bi-bit bi-pass logic switch valve, its main feature is that big flow, low pressure loss work may be implemented.
Existing two-way plug-in valve is able to satisfy general double pump control system, but for large-tonnage mobilecrane,
It especially for some occasions for having particular/special requirement, for example needs to carry out throttling control to flow, to obtain good control speed
When spending, traditional two-way logic inserted valve is because its switching characteristic just cannot achieve throttle grverning, to cause to executive component
Impact is big, so that car body is shaken, influences product service life, and two-way plug-in valve is in big flow poor sealing performance.
Utility model content
It cannot be adapted in big flow operating condition and work that there are calorific values is big to solve existing switching valve in background technique, shake
Deng problem, the utility model provides a kind of closed system and integrates switching valve.
The technical solution of the utility model is: a kind of integrated switching valve of closed system, including control switching circuit, luffing control
Circuit processed and expansion control loop, the control switching circuit include first pressure mouth, second pressure mouth, the first reversal valve,
Second reversal valve, the first inserted valve, the second inserted valve, the first slide valve, the second slide valve and shuttle valve；The luffing control loop packet
Include third inserted valve, third reversal valve；
Shuttle valve for choosing the pressure oil of first pressure mouth and second pressure mouth, and is exported and is changed to the first reversal valve, second
To valve, third reversal valve；
First reversal valve has so that the first inserted valve control chamber is connected with fuel tank and receives pressure oil supply at shuttle valve
To the first position of the first slide valve, makes the first slide valve control chamber be connected after commutation with fuel tank and receive pressure oil confession at shuttle valve
To the second position to the first inserted valve；
Second reversal valve has so that the second inserted valve control chamber is connected with fuel tank and receives pressure oil supply at shuttle valve
To the first position of the second slide valve, makes the second slide valve control chamber be connected after commutation with fuel tank and receive pressure oil confession at shuttle valve
To the second position to the second inserted valve；
First inserted valve has and opens so that the first position that first pressure mouth is connected with the first delivery outlet, by shuttle valve
Locate the second position that pressure oil is closed through the control of the first reversal valve；
Second inserted valve has and opens so that the first position that second pressure mouth is connected with the second delivery outlet, by shuttle valve
Locate the second position that pressure oil is closed through the control of the second reversal valve；
First slide valve has the first position closed when the first inserted valve is in first position, at the first inserted valve
It opens when the second position so that the second position that first pressure mouth is connected with interflow mouth；
Second slide valve has the first position closed when the second inserted valve is in first position, at the second inserted valve
It opens when the second position so that the second position that second pressure mouth is connected with interflow mouth；
Third reversal valve has so that the closed first position of third inserted valve control chamber, so that third inserted valve controls
The second position that chamber is connected with fuel tank；
Third inserted valve has the first position closed, when third reversal valve is in the second position interflow mouth is passed through
The second position that third inserted valve is connected with luffing interface；
Expansion control loop, for receiving the pressure oil of interflow mouth and exporting to telescopic oil cylinder.
As a kind of improvement of the utility model, expansion control loop includes flexible pilot valve and flexible reversal valve,
Flexible pilot valve is changed for receiving pilot pressure oil and exporting to the flexible flexible reversal valve of reversal valve control chamber control
To；
Flexible reversal valve, for receiving the pressure oil of interflow mouth and controlling pressure oil output to flexible oil by flexible pilot valve
Cylinder rod chamber interface or telescopic oil cylinder rodless cavity interface.
It is additionally provided with flexible counterbalance valve as a further improvement of the utility model, the flexible counterbalance valve includes flexible
Inserted valve and flexible back pressure reversal valve, the flexible back pressure reversal valve are connected with flexible inserted valve control chamber and are used to control
The opening and closing of flexible inserted valve, the flexible inserted valve are connected for returning in telescopic oil cylinder rod chamber interface with flexible reversal valve
Back pressure is provided when oily.
Constant current filtering valve, constant current are additionally provided in the luffing control loop as a further improvement of the utility model,
Valve oil inlet is filtered when third inserted valve is in first position for receiving interflow mouth pressure oil or luffing interface pressure oil, is determined
Stream filtering valve oil outlet is connected with fuel tank, and constant current filters valve and is equipped with luffing restriction, and constant current filters the pressure at valve oil inlet
Power oil is not connected with constant current filtering valve control chamber, after luffing restriction with constant current filtering valve spring chamber, and constant current filters valve
The pressure of the oil pressure of control chamber and constant current filtering valve spring chamber, which cooperates, controls the size that constant current filtering valve core is opened.
It is additionally provided with constant current reversal valve as a further improvement of the utility model, the constant current reversal valve is set to third
Between inserted valve and constant current filtering valve, the constant current reversal valve has so that third inserted valve oil outlet, luffing interface difference
The first position being connected with constant current filtering valve oil inlet, so that third inserted valve oil outlet, luffing interface are filtered with constant current respectively
The second position that wave valve oil inlet is spaced.
First slide valve includes valve pocket and spool as a further improvement of the utility model, on the valve pocket
Equipped with the first working hole, the second working hole and accommodating cavity, the valve core housing is set in the accommodating cavity of valve pocket and slides with valve pocket
Cooperation, the spool have open so that the interconnected first state and closing of the first working hole, the second working hole so that
The second mutually isolated state of first working hole, the second working hole, the spool include the first guide part, the second guide part and
The valve sleeving inner wall of sealing, first guide part, the second guide part corresponding place respectively fits, the sealing
The tapered and realization sealing that cooperates when spool is in the second state with valve pocket.
The accommodating cavity in valve pocket is divided into slide valve control by the spool as a further improvement of the utility model,
Chamber, slide valve connection chamber and slide valve spring chamber, the slide valve connection chamber is set between slide valve control chamber and slide valve spring chamber, described
Slide valve spring it is intracavitary be equipped with slide valve elastic component, the slide valve elastic component there is driving spool to tend to the movement of first state become
Spool is pressed to the second state by the first guide part after entering pressure oil by gesture, the slide valve control chamber.
It is additionally provided with pressure regulator as a further improvement of the utility model, the pressure regulator includes the 4th
Inserted valve, commutation valve group and multiple Pressure relief valves, the set pressure of multiple Pressure relief valves are all different, the reversal valve
Group is connected with the 4th inserted valve control chamber and passes through the commutation of commutation valve group so that the 4th inserted valve controller and specific pressure
Power overflow valve is connected.
The utility model has the beneficial effects that making full use of the big flow characteristic of two-way plug-in valve, big flow, low pressure are realized
Damage work, in combination with the big stroke of reversing slide valve, throttle grverning is good the features such as, and sufficiently combine system in hydraulic motor,
The actual demand of oil cylinder executive component, two-way plug-in valve and reversing slide valve are organically combined, and form new logic control
Circuit, so that HYDRAULIC CONTROL SYSTEM is convenient and reliable, performance is good, is used as power source using enclosed pump, it can driving hoisting system,
Flexible, changing-breadth system can also be driven, and composite move may be implemented using double pump system.The utility model also has structure simple
The advantages that single, easy to assembly, reliable in action, crushing is few, small, the good seal performance of impact, zero leakage long service life.
Detailed description of the invention
Attached drawing 1 is the hydraulic schematic diagram of the utility model embodiment.
Attached drawing 2 is the hydraulic schematic diagram controlled at switching circuit I.
Attached drawing 3 is the structural schematic diagram that spool 52 is in first state in attached drawing 2.
Attached drawing 4 is the structural schematic diagram that spool 52 is in the second state in attached drawing 2.
Attached drawing 5 is the structure enlargement diagram in attached drawing 4 at D.
Attached drawing 6 is the hydraulic schematic diagram in attached drawing 1 at luffing control loop II.
Attached drawing 7 is the hydraulic schematic diagram in attached drawing 1 at pressure regulator IV.
In figure, the 1, first reversal valve；2, the second reversal valve；3, the first inserted valve；4, the second inserted valve；5, the first slide valve；
51, valve pocket；511, the first working hole；512, the second working hole；513, accommodating cavity；5131, slide valve control chamber；5132, slide valve connects
Cavity；5133, slide valve spring chamber；52, spool；521, the first guide part；522, the second guide part；523, sealing；524, it saves
Chute；525, interconnecting piece；526, mounting hole；53, elastic component；54, Glais ring；55, seal assembly；551, sealing ring；552, close
Seal.6, the second slide valve；7, shuttle valve；8, throttle orifice；9, third reversal valve；10, third inserted valve；11, stretch pilot valve；12,
Flexible reversal valve；13, stretch counterbalance valve；14, stretch inserted valve；15, stretch back pressure reversal valve；16, constant current filters valve；161,
Luffing restriction；17, constant current reversal valve；18, the 4th inserted valve；19, commutate valve group；21, Pressure relief valve；A1, the first output
Mouthful；A2, the second delivery outlet；A3, telescopic oil cylinder rodless cavity interface；B3, telescopic oil cylinder rod chamber interface；A5, luffing interface；I, it controls
Switching circuit processed；II, luffing control loop；III, expansion control loop；IV, pressure regulator；P1, first pressure mouth；P2,
Two pressure ports；P3, interflow mouth；P4, pilot pressure oil.
Specific embodiment
The utility model embodiment is described further with reference to the accompanying drawing:
As shown in Figure 1, a kind of closed system integrates switching valve, including controls switching circuit I, luffing control loop II and stretch
Contracting control loop III, the control switching circuit I include first pressure mouth P1, second pressure mouth P2, the first reversal valve 1, the
Two reversal valves 2, the first inserted valve 3, the second inserted valve 4, the first slide valve 5, the second slide valve 6 and shuttle valve 7；The luffing controls back
Road includes third inserted valve, third reversal valve；
Shuttle valve 7 for choosing the pressure oil of first pressure mouth and second pressure mouth, and is exported to the first reversal valve, second
Reversal valve, third reversal valve；
First reversal valve 1 has so that the first inserted valve control chamber is connected with fuel tank and receives pressure oil confession at shuttle valve
To the first position to the first slide valve, makes the first slide valve control chamber be connected after commutation with fuel tank and receive pressure oil at shuttle valve
It is supplied to the second position of the first inserted valve；
Second reversal valve 2 has so that the second inserted valve control chamber is connected with fuel tank and receives pressure oil confession at shuttle valve
To the first position to the second slide valve, makes the second slide valve control chamber be connected after commutation with fuel tank and receive pressure oil at shuttle valve
It is supplied to the second position of the second inserted valve；
First inserted valve 3 has and opens so that the first position that first pressure mouth is connected with the first delivery outlet A1, by shuttle
The second position that pressure oil is closed through the control of the first reversal valve at valve；
Second inserted valve 4 has and opens so that the first position that second pressure mouth is connected with the second delivery outlet A2, by shuttle
The second position that pressure oil is closed through the control of the second reversal valve at valve；
First slide valve 5 has the first position closed when the first inserted valve is in first position, at the first inserted valve
It opens when the second position so that the second position that first pressure mouth is connected with interflow mouth P3；
Second slide valve 6 has the first position closed when the second inserted valve is in first position, at the second inserted valve
It opens when the second position so that the second position that second pressure mouth is connected with interflow mouth；
Third reversal valve 9 has so that the closed first position of third inserted valve control chamber, so that third inserted valve controls
The second position that chamber is connected with fuel tank；
Third inserted valve 10 has the first position closed, makes interflow mouth when third reversal valve is in the second position
The second position being connected through third inserted valve with luffing interface；
Expansion control loop III, for receiving the pressure oil of interflow mouth P3 and exporting to telescopic oil cylinder.The utility model fills
Divide the big flow characteristic using two-way plug-in valve, big flow, low pressure loss work is realized, in combination with the big stroke of reversing slide valve, section
The features such as stream speed regulation property is good, and the actual demand of hydraulic motor, oil cylinder executive component in system is sufficiently combined, two-way is inserted
Valve and reversing slide valve are organically combined, and new loop control logic is formd, so that HYDRAULIC CONTROL SYSTEM is convenient and reliable, performance
It is good, power source is used as using enclosed pump, it can driving hoisting system can also drive flexible, changing-breadth system, and use double pump
Composite move may be implemented in system.The utility model also has structure simple, easy to assembly, and reliable in action, crushing is few, impact
It is small, the advantages that good seal performance, zero leakage long service life.
The first inserted valve control chamber, the second inserted valve control chamber, the first slide valve control chamber, the second slide valve control chamber
Place is equipped with throttle orifice 8.The setting of throttle orifice is so that the impact that inserted valve and slide valve are subject to when switching is small.
Certainly in practical work process, the position of slide valve and inserted valve can be converted so as to different operating conditions into
Row speed regulation, can be adapted to different hydraulic system particular/special requirements.The placement location of slide valve is unrestricted in this system, due to present
Slide valve is interflow outlet in system, is used for luffing and telescopic system, is the preferred embodiment of the utility model.
In attached drawing 2, the first inserted valve 3, the second inserted valve 4, the first slide valve 5, the second slide valve 6 four are in slide valve and inserted valve
Between can be freely combined (transposition), realization adjusts the speed different location operating condition, and other operating conditions then utilize the big of inserted valve
Flow, low pressure loss operating condition, system effectiveness is high, and control is reliable.The utility model combination large-tonnage mobilecrane is typically double
Pumping system (referring to attached drawing 2) is further detailed, and first pressure mouth P1, second pressure mouth P2 are separately connected No. 1 oil pump and 2
Number oil pump, the first delivery outlet A1 and the second delivery outlet A2 are separately connected main raising, secondary raising movement, and P3 mouthful of interflow mouth connections are stretched
It is acted with luffing.It is multiple that master winch single movement, secondary elevator single movement, secondary elevator of advocating peace have been separately included in four kinds of work-based logics
Conjunction movement, master file+flexible/luffing movement, secondary volume+flexible/luffing movement, flexible/luffing double pump fuel feeding movement.The utility model
Make full use of the big flow characteristic of two-way plug-in valve, realize big flow, low pressure loss work, in combination with the big stroke of reversing slide valve,
The features such as throttle grverning is good, and the actual demand of hydraulic motor, oil cylinder executive component in system is sufficiently combined, two-way is inserted
Dress valve and reversing slide valve are organically combined, and new loop control logic is formd, so that HYDRAULIC CONTROL SYSTEM is convenient and reliable, property
It can be good.It is additionally provided with cone valve structure in certain the utility model slide valve, so that good seal performance in the utility model, in hydraulic system
The middle demand according to system executive component, needs slide valve just to use slide valve, and cone valve is needed just to use cone valve, and the position of cone valve and slide valve is not
It is restricted, is selected according only to actual condition, so that product range of fit is wide.
Expansion control loop III includes flexible pilot valve 11 and flexible reversal valve 12,
Flexible pilot valve 11 is changed for receiving pilot pressure oil P4 and exporting to flexible 12 control chamber of reversal valve control is flexible
It commutates to valve 12；
Flexible reversal valve 12, for receiving the pressure oil of interflow mouth P3 and controlling pressure oil output extremely by flexible pilot valve 11
Telescopic oil cylinder rod chamber interface B3 or telescopic oil cylinder rodless cavity interface A3.
The utility model is additionally provided with flexible counterbalance valve 13, and the flexible counterbalance valve 13 includes flexible inserted valve 14 and stretches
Back pressure reversal valve 15, the flexible back pressure reversal valve are connected with flexible inserted valve control chamber and are used to control flexible inserted valve
Opening and closing, the flexible inserted valve is connected for the offer in telescopic oil cylinder rod chamber interface B3 oil return with flexible reversal valve
Back pressure.The flexible back pressure of flexible back pressure reversal valve refers to the reversal valve for back pressure control of stretching, rather than the reversal valve has and stretches
Contracting back pressure function.Specifically, the flexible reversal valve is 3-position 4-way electro-hydraulic reversing valve, the flexible guide for the reversal valve that stretches
Valve commutation is in left position, and the guide oil of pilot pressure oil P4 reaches at flexible reversal valve control chamber, so that flexible reversal valve commutation
To right position, working connection interflow mouth P3 pressure oil reaches flexible reversal valve and then locates to telescopic oil cylinder rodless cavity interface A3, carries out oily
Cylinder stretches movement.At this point, telescopic oil cylinder rod chamber interface B3 oil return reaches, reached at flexible inserted valve 14 by flexible reversal valve,
Flexible back pressure reversal valve 15 must not be electric, provides certain back pressure, prevents oil liquid whole oil return.The flexible pilot valve of flexible reversal valve
Commutation is in right position, and the guide oil of pilot pressure oil P4 reaches at flexible reversal valve control chamber so that flexible reversal valve commutate to
Left position, working connection interflow mouth P3 pressure oil reach flexible reversal valve and then locate to telescopic oil cylinder rod chamber interface B3, progress oil cylinder
Contracting movement.At this point, oil cylinder rodless cavity oil return, is reached at flexible inserted valve 14 by flexible reversal valve, stretch back pressure reversal valve 15
Must be electric, back pressure is not provided.In telescopic system, electric and power loss is obtained by the back pressure reversal valve 15 that stretches, certain contracting arm is provided
Back pressure, for because rebounding caused by power imbalance, and forward extending out a bit of when oil cylinder is reduced to bottom；On the other hand for preventing
After only boom stretching is gone, contracting arm is carried out again after standing a period of time, is caused contracting arm to be delayed since oil liquid is not full of, is provided one
Fixed back pressure can effectively eliminate the above problem.
Constant current filtering valve 16 is additionally provided in the luffing control loop II, constant current filters valve oil inlet in third inserted valve
For receiving interflow mouth pressure oil or luffing interface pressure oil when in first position, constant current filtering valve oil outlet is connected with fuel tank
It connects, constant current filters valve and is equipped with luffing restriction 161, and constant current filters the pressure oil at 16 oil inlet of valve and filters valve with constant current respectively
Control chamber, after luffing restriction 161 with constant current filtering valve spring chamber be connected, constant current filter valve control chamber oil pressure and constant current
The pressure for filtering valve spring chamber, which cooperates, controls the size that constant current filtering valve core is opened.Constant current filters the setting of valve, can be with
Buffering filter action is played, the pressure peak of movement original state is effectively reduced, this practical new the utility model efficiently solves
Luffing rises and falls moment because of shock problem caused by the variation of load friction power, eliminates system pressure peak value, the starting of safety action is soft
With it is steady.The utility model also has easy to control, reliable, and at low cost, performance is stablized, the advantages that long service life.
The utility model is additionally provided with constant current reversal valve 17, and the constant current reversal valve 17 is set to third inserted valve 10 and constant current
It filters between valve 16, the constant current reversal valve has so that third inserted valve oil outlet, luffing interface are filtered with constant current respectively
The first position that valve oil inlet is connected, so that third inserted valve oil outlet, luffing interface filter valve oil inlet with constant current respectively
The second position being spaced.Specifically, the constant current reversal valve is bi-bit bi-pass reversal valve.Constant current reversal valve is that electromagnetism changes
To valve, constant current is for referring to that the reversal valve is used to control constant current filtering valve rather than the reversal valve has the function of constant current.More specifically
Say, the constant current reversal valve be solenoid directional control valve.Constant current reversal valve is solenoid valve, can be opened or closed with moment, luffing
When beginning, it is normal open state, eliminates system pressure peak value, the starting of safety action is soft, steady；It during the work time, can be with
Switch constant current reversal valve, and be allowed to close, reduces flow loss in work.
The utility model constant current filtering valve and hydraulic control system principle it is as follows: luffing interface A5 connect luffing control valve into
Enter the big chamber of oil cylinder, increases constant flow at luffing interface A5 and filter valve, be equipped with two-position two-way electromagnetic directional valve open in usual before the valve.
Its working principle is that: when carrying out luffing raising operating condition, high pressure oil from variable pump reach two-way plug-in valve into
Hydraulic fluid port, the control reversal valve (for solenoid valve) that two-way plug-in valve controls end cap obtain electric commutation, and third inserted valve is opened, constant current at this time
Reversal valve (being also solenoid valve) must not be electric, and system starts transient pressure spike and passes through constant flow filtering valve bypass oil return, cuts down and presses
Power peak value.Similarly, when luffing falls, oil liquid flows to interflow mouth P3 from luffing interface A5, changes when because of luffing whereabouts momentary load
When leading to the pressure oscillation of initial state, valve can be filtered by constant flow and bypass oil return, cut down pressure peak.In real work
Cheng Zhong can switch constant current reversal valve, and be allowed to close, and reduce flow loss in work, and the utility model efficiently solves change
Width rises and falls moment because of shock problem caused by the variation of load friction power, eliminates system pressure peak value, the starting of safety action is soft,
Steadily.
First slide valve 5 includes valve pocket 51 and spool 52, and the valve pocket 51 is equipped with the first working hole 511, the
Two working holes 512 and accommodating cavity 513, the spool 52 are sheathed in the accommodating cavity 513 of valve pocket 51 and match with the sliding of valve pocket 51
It closes, the spool 52 has opening so that the first state and pass that the first working hole 511, the second working hole 512 are interconnected
It closes so that mutually isolated the second state of the first working hole 511, the second working hole 512, the spool 52 include the first guiding
Portion 521, the second guide part 522 and sealing 523, first guide part 521, the second guide part 522 are distinguished corresponding
51 inner wall of valve pocket at place fits, the sealing 523 it is tapered and when spool 52 is in the second state with 51 phase of valve pocket
Mutually sealing is realized in cooperation.Specifically, the first working hole 511 and the second working hole 512 make so on the side wall of valve pocket
It obtains product and is further reduced oil leak possibility in Mass flow system.The utility model spool uses the structure type of slide valve, overcurrent
Area carries out gradual change with spool displacement, and spool and valve pocket are capable of forming cone valve linear sealing, realize the function of zero leakage, so that producing
Product i.e. the characteristics of can guarantee existing inserted valve big flow, low pressure loss, while sealed reliable, with the movement of spool, throttling channel by
Step is opened, and realizes gradually becoming larger for area of passage, and then realize being slowly increased for flow, time throttle grverning.The utility model
Also have structure simple, it is easy to assembly, the advantages that reliable in action, long service life.When spool is in first state, such as Fig. 3
Shown, plug-in slide valve spool under the action of elastic component such as spring is in upper, at this time the first working hole 511 and the second work
Mouth 512 is connected, and slide valve is in the position opened and opened；When spool is in the second state, as shown in figure 4, slide valve control chamber is logical
When high pressure oil, spool moves down under the action of high pressure oil, and compressed spring, at this time the first working hole 511 and the second work
512 mouthfuls of closings of mouth, slide valve are in the position closed.In the 512 mouthfuls of closings of the first working hole 511 and the second working hole by spool and
Valve pocket forms linear sealing, to realize zero leakage；With the movement of spool, throttling channel is gradually opened, and realizes area of passage gradually
Become larger, and then realizes being slowly increased for flow, time throttle grverning.The utility model adds the structure that cone valve combines using slide valve
Form, it can realize the speed regulation of restriction, the zero leakage of cone valve also may be implemented.
The spool 52 is recessed inwardly to form throttling channel 524 at sealing 523.The setting of throttling channel is in spool
When movement is opened, throttling channel is gradually opened, and realizes gradually becoming larger for area of passage, and then realize being slowly increased for flow, time
Throttle grverning avoids car body from shaking to reduce the temporary impact to car body.
The throttling channel 524 is set between the first working hole 511 and the second working hole 512, and the throttling channel 524 is in
Annular setting.Make product easy to process, in this way convenient for accurate control.
There are two the throttling channels 524, and two throttling channels 524 are arranged in staged.Such structure makes product
Throttle grverning effect is more preferable.Specifically, the throttling channel on each ladder can be multiple, and multiple throttling channels are circumferentially distributed in valve
At core, or entirely in a ring.Certainly again in practical work process, the radial depth close to throttling channel at sealing is less than
Radial depth far from throttling channel at sealing.Such structure makes product restriction effect more preferable.
Interconnecting piece 525, first guide part are equipped between first guide part 521 and the second guide part 522
521 diameter is greater than the diameter of the second guide part 522, and the diameter of second guide part 522 is greater than the straight of interconnecting piece 525
Diameter.The utility model is oriented to by the first guide part and the second guide part, so that valve core movement is steady, is especially being flowed greatly
In amount system, more specifically, sealing is set at the first guide part.Such structure is convenient for the installation of spool, movement.
First guide part 521 is equipped with convenient for the mounting hole 526 of plug spool 52.Such structure is convenient for spool
Dismounting.
Accommodating cavity 513 in valve pocket 51 is divided into slide valve control chamber 5131 by the spool 52, slide valve is connected to chamber 5132
With slide valve spring chamber 5133, the slide valve connection chamber 5132 is set between slide valve control chamber 5131 and slide valve spring chamber 5133,
Elastic component 53 is equipped in the slide valve spring chamber 5133, there is the elastic component 53 driving spool 52 to tend to first state
Spool 52 is pressed to second by the first guide part 521 after entering pressure oil by movement tendency, the slide valve control chamber 5131
State.Such structure makes product movement simple and reliable, and system response is fast.
First guide part 521 is set between slide valve control chamber 5131 and slide valve connection chamber 5132 and controls slide valve
Chamber 5131 is connected to chamber 5132 with slide valve and separates, and 521 circumferential direction of the first guide part is equipped with Glais ring 54.It is arranged on spool
Glais ring completely cuts off slide valve control chamber and working hole, avoids internal leakage problem caused by high pressure.
The stepped setting in 51 outer surface of valve pocket is equipped with sealing group on the outer surface of each ladder-like valve pocket 51
Part 55.Specifically, the seal assembly 55 includes sealing ring 551 and sealing ring 552, and there are two the sealing rings 551,
The sealing ring 552 is set between two sealing rings 551.The stepped setting in valve pocket outer surface is installed convenient for product, multiple groups
Seal assembly enables product hermeticity good.
The utility model is additionally provided with pressure regulator 21, and the pressure regulator 21 includes the 4th inserted valve 18, commutation
The set pressure of valve group 19 and multiple Pressure relief valves 21, multiple Pressure relief valves 21 is all different, the commutation valve group with
4th inserted valve control chamber is connected and passes through the commutation of commutation valve group so that the 4th inserted valve controller and specific pressure are overflow
Stream valve is connected.Commutate valve group 19 include a three-position four-way electromagnetic directional valve and a two-position two-way electromagnetic directional valve, three
The middle position of four-way electromagnetic reversing valve is " H " type, and the utility model is different by four Pressure relief valves setting pressure, thus real
Existing multistage pressure control selections.Commutate the three-position four-way electromagnetic directional valve of valve group, pass through difference at two-position two-way electromagnetic directional valve
Power loss combination, to realize different overflow valve pressure rating settings, to meet the different pressure etc. of above-mentioned various working
Grade needs.When executing different function with the different executing agencies in the hydraulic system of the utility model, choosing can according to need
Suitable pressure rating is selected, to obtain protection executing agency, reduce the good effects such as energy consumption, smooth working.
A kind of control method integrating switching valve for above-mentioned closed system can carry out control as follows:
1. master file single movement；(1) single pump condition: the first reversal valve must not electricity, the first inserted valve control chamber draining, first
Inserted valve is opened, and after first pressure mouth flows to the first delivery outlet by the first inserted valve, is flowed to main winch motor, is driven master winch
Motor carries out master file movement；
2. pair volume works independently: (1) single pump condition: the second reversal valve must not electricity, the second inserted valve control chamber draining, second
Inserted valve is opened, and after second pressure mouth flows to the second delivery outlet by the second inserted valve, is flowed to secondary hoist motor, is driven secondary elevator
Motor carries out secondary scrolling and makees；
3. luffing single movement: (1) single pump condition: the second reversal valve obtains electric, and third reversal valve obtains electric, second pressure mouth warp
Then second slide valve arrives luffing interface, the external luffing control valve oil inlet of luffing interface, oil liquid and then flow direction to third inserted valve
Derricking cylinder rodless cavity, so that luffing be driven to act；(2) Dual-pump flow-converging operating condition: the first reversal valve, the second reversal valve, third reversal valve
It is electric, for first pressure mouth through the first slide valve, second pressure mouth to third inserted valve behind interflow, then arrives luffing through the second slide valve
Interface, the external luffing control valve oil inlet of luffing interface, oil liquid flows to derricking cylinder rodless cavity in turn, to drive the high quick-action of luffing
Make；
4. expanding-contracting action: (1) single pump condition: the second reversal valve obtains electric, and second pressure mouth is through the second slide valve to flexible commutation
Valve, oil liquid drive the movement of telescopic oil cylinder list pump；(2) Dual-pump flow-converging operating condition: the first reversal valve and the second reversal valve obtain electric, the first pressure
Power mouth is through the first slide valve, and second pressure mouth is through the second slide valve, and to flexible reversal valve behind interflow, oil liquid drives telescopic oil cylinder interflow dynamic
Make；
5. composite move: the composite move includes that master winch and secondary elevator composite move, master winch and luffing are compound
Movement, master winch and flexible single movement, secondary elevator and luffing composite move, secondary elevator and flexible composite move.
Composite move includes following several:
(1) master winch and secondary elevator composite move: the first reversal valve, the second reversal valve must not electricity, the first slide valve, second
Slide valve is in an off state, at this time first pressure confession master winch, second pressure confession pair elevator under high pressure oil effect, into
Row composite move；
(2) master winch and luffing composite move: the first reversal valve must not electricity, the first slide valve be in an off state, the second commutation
Valve obtains electric, the second slide valve and is in connected state, and third reversal valve obtains electric, first pressure confession main winch motor, the second pressure at this time
Power mouth pressure oil reaches at third inserted valve by the second slide valve for changing-breadth system, carries out composite move；
(3) master winch and flexible single movement: the first reversal valve must not electricity, the first slide valve close, the second inserted valve, which is opened, to be connected
Lead to, the second reversal valve obtains electric, the second slide valve and opens connection, and third reversal valve must not be electric, and the pilot valve that stretches is carried out by obtaining power loss
Flexible reversal valve commutation is controlled, to realize that telescopic oil cylinder is stretched or the contracting of telescopic oil cylinder oil cylinder, first pressure confession master winch at this time
Motor, second pressure mouth oil reach at flexible reversal valve by the second slide valve for stretching, and carry out composite move；B3 telescoping cylinder contracting oil
Mouthful, A3, A3 ' mouth connect telescoping cylinder balanced valve oil inlet, and then reach telescoping cylinder without cylinder chamber (stretching hydraulic fluid port).
(4) secondary elevator and luffing composite move: the second reversal valve must not electricity, the second slide valve close, the first reversal valve obtain it is electric,
First slide valve opens connection, and the first inserted valve is closed, and third reversal valve obtains electric, second pressure confession pair hoist motor, the at this time
Two pressure port oil reach at third inserted valve by the second slide valve of converging valve for changing-breadth system, carry out composite move；
(5) secondary elevator and flexible composite move: the second reversal valve must not electricity, the second slide valve close, the first reversal valve obtain it is electric,
The unlatching connection of first slide valve, the first inserted valve are closed, and third reversal valve must not be electric, and flexible pilot valve is controlled by obtaining power loss
Flexible reversal valve commutation, second pressure confession pair hoist motor, first pressure mouth oil reach flexible change by the first slide valve at this time
For flexible to valve, progress composite move.B3 mouthfuls connect telescoping cylinder contracting hydraulic fluid port, and A3, A3 ' mouth connect telescoping cylinder balanced valve oil inlet, into
And telescoping cylinder is reached without cylinder chamber (stretching hydraulic fluid port).Specifically, the flexible reversal valve is 3-position 4-way electro-hydraulic reversing valve, is stretched
The flexible pilot valve commutation of reversal valve is in left position, and the guide oil of pilot pressure oil P4 reaches at flexible reversal valve control chamber, makes
The reversal valve that must stretch commutates to right position, and working connection interflow mouth P3 pressure oil reaches flexible reversal valve then to telescopic oil cylinder rodless cavity
At interface A3, carries out oil cylinder and stretch movement.At this point, telescopic oil cylinder rod chamber interface B3 oil return reaches, reached by flexible reversal valve
At flexible inserted valve 14, the back pressure reversal valve 15 that stretches must not be electric, provides certain back pressure, prevents oil liquid whole oil return.It is flexible to change
It is in right position to the commutation of the flexible pilot valve of valve, the guide oil of pilot pressure oil P4 reaches at flexible reversal valve control chamber, so that
Flexible reversal valve commutates to left position, and working connection interflow mouth P3 pressure oil reaches flexible reversal valve then to telescopic oil cylinder rod chamber
At interface B3, oil cylinder contracting movement is carried out.At this point, oil cylinder rodless cavity oil return, is reached at flexible inserted valve 14 by flexible reversal valve,
Flexible back pressure reversal valve 15 must be electric, does not provide back pressure.In telescopic system, electric and mistake is obtained by the back pressure reversal valve 15 that stretches
Electricity provides certain contracting arm back pressure, for when oil cylinder is reduced to bottom, because rebounding caused by power imbalance, and it to be small to forward extend out one
Section；On the other hand after being used to prevent boom stretching from going, contracting arm is carried out again after standing a period of time, is led since oil liquid is not full of
The delay of contracting arm is caused, certain back pressure is provided, the above problem can be effectively eliminated.
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 describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " are used for description purposes only, and should not be understood as instruction or
Imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.In addition, in the description of the present invention, unless otherwise indicated, " multiples' " contains
Justice is two or more.
Every technical staff's notice: although the utility model is described according to above-mentioned specific embodiment, this
The utility model thought of utility model is not limited to that utility model, and any repacking with the utility model thought all will
It is included in this patent scope of patent protection.
Claims (8)
1. a kind of closed system integrates switching valve, which is characterized in that including control switching circuit, luffing control loop and flexible control
Circuit processed, the control switching circuit include first pressure mouth, second pressure mouth, the first reversal valve, the second reversal valve, first
Inserted valve, the second inserted valve, the first slide valve, the second slide valve and shuttle valve；The luffing control loop includes third inserted valve,
Three reversal valves；
Shuttle valve for choosing the pressure oil of first pressure mouth and second pressure mouth, and is exported to the first reversal valve, the second commutation
Valve, third reversal valve；
First reversal valve has so that the first inserted valve control chamber, which is connected with fuel tank and receives pressure oil at shuttle valve, is supplied to the
The first position of one slide valve, the first slide valve control chamber be connected with fuel tank and receives pressure oil at shuttle valve to be supplied to after commutation
The second position of first inserted valve；
Second reversal valve has so that the second inserted valve control chamber, which is connected with fuel tank and receives pressure oil at shuttle valve, is supplied to the
The first position of two slide valves, the second slide valve control chamber be connected with fuel tank and receives pressure oil at shuttle valve to be supplied to after commutation
The second position of second inserted valve；
First inserted valve has and opens so that the first position that first pressure mouth is connected with the first delivery outlet, is pressed by shuttle valve
The second position that power oil is closed through the control of the first reversal valve；
Second inserted valve has and opens so that the first position that second pressure mouth is connected with the second delivery outlet, is pressed by shuttle valve
The second position that power oil is closed through the control of the second reversal valve；
First slide valve has the first position closed when the first inserted valve be in first position, in the first inserted valve in the
It opens when two positions so that the second position that first pressure mouth is connected with interflow mouth；
Second slide valve has the first position closed when the second inserted valve be in first position, in the second inserted valve in the
It opens when two positions so that the second position that second pressure mouth is connected with interflow mouth；
Third reversal valve has so that the closed first position of third inserted valve control chamber so that third inserted valve control chamber with
The second position that fuel tank is connected；
Third inserted valve has the first position closed, makes interflow mouth through third when third reversal valve is in the second position
The second position that inserted valve is connected with luffing interface；
Expansion control loop, for receiving the pressure oil of interflow mouth and exporting to telescopic oil cylinder.
2. closed system according to claim 1 integrates switching valve, which is characterized in that expansion control loop includes flexible first
Pilot valve and flexible reversal valve,
Flexible pilot valve controls flexible reversal valve commutation to flexible reversal valve control chamber for receiving pilot pressure oil and exporting；
Flexible reversal valve, for receiving the pressure oil of interflow mouth and being had by flexible pilot valve control pressure oil output to telescopic oil cylinder
Rod cavity interface or telescopic oil cylinder rodless cavity interface.
3. closed system according to claim 2 integrates switching valve, which is characterized in that it is additionally provided with flexible counterbalance valve, it is described
Flexible counterbalance valve include flexible inserted valve and flexible back pressure reversal valve, the flexible back pressure reversal valve and flexible cartridge valve controlled
Chamber processed is connected and is used to control the opening and closing of flexible inserted valve, the flexible inserted valve be connected with flexible reversal valve for
Back pressure is provided when telescopic oil cylinder rod chamber interface oil return.
4. closed system according to claim 1 integrates switching valve, which is characterized in that in the luffing control loop also
Valve is filtered equipped with constant current, constant current filters valve oil inlet when third inserted valve is in first position for receiving interflow mouth pressure oil
Or luffing interface pressure oil, constant current filtering valve oil outlet are connected with fuel tank, constant current filters valve and is equipped with luffing restriction, constant current
It filters the pressure oil at valve oil inlet and filters valve spring chamber with constant current with constant current filtering valve control chamber, after luffing restriction respectively
It is connected, the pressure mutual cooperation control constant current that constant current filters the oil pressure and constant current filtering valve spring chamber of valve control chamber filters valve valve
The size that core is opened.
5. closed system according to claim 4 integrates switching valve, which is characterized in that it is additionally provided with constant current reversal valve, it is described
Constant current reversal valve be set to third inserted valve and constant current filtering valve between, the constant current reversal valve have so that third inserted valve
The first position that oil outlet, luffing interface are connected with constant current filtering valve oil inlet respectively, so that third inserted valve oil outlet, change
The second position that width interface is spaced with constant current filtering valve oil inlet respectively.
6. closed system according to claim 1 integrates switching valve, which is characterized in that first slide valve includes valve pocket
And spool, the valve pocket are equipped with the first working hole, the second working hole and accommodating cavity, the valve core housing is set to the appearance of valve pocket
It sets intracavitary and slides cooperation with valve pocket, the spool, which has, to be opened so that the first working hole, the second working hole are interconnected
It first state and closes so that mutually isolated the second state of the first working hole, the second working hole, the spool include first
Guide part, the second guide part and sealing, first guide part, the second guide part distinguish the valve sleeving inner wall at corresponding place
It fits, the sealing is tapered and realizes sealing with valve pocket mutual cooperation when spool is in the second state.
7. closed system according to claim 6 integrates switching valve, which is characterized in that the spool is by the appearance in valve pocket
Set chamber and be divided into slide valve control chamber, slide valve connection chamber and slide valve spring chamber, the slide valve connection chamber be set to slide valve control chamber and
Between slide valve spring chamber, the slide valve spring is intracavitary to be equipped with slide valve elastic component, and the slide valve elastic component has driving spool
Tend to the movement tendency of first state, the slide valve control chamber is pressed to spool by the first guide part after entering pressure oil
Second state.
8. closed system according to claim 1 integrates switching valve, which is characterized in that it is additionally provided with pressure regulator, it is described
Pressure regulator include the 4th inserted valve, commutation valve group and multiple Pressure relief valves, the set pressure of multiple Pressure relief valves
It is all different, the commutation valve group is connected with the 4th inserted valve control chamber and passes through the commutation of commutation valve group so that the 4th inserts
Dress valve control is connected with specific Pressure relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820979133.1U CN208345604U (en) | 2018-06-25 | 2018-06-25 | Closed system integrates switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820979133.1U CN208345604U (en) | 2018-06-25 | 2018-06-25 | Closed system integrates switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208345604U true CN208345604U (en) | 2019-01-08 |
Family
ID=64880889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820979133.1U Withdrawn - After Issue CN208345604U (en) | 2018-06-25 | 2018-06-25 | Closed system integrates switching valve |
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| Country | Link |
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| CN (1) | CN208345604U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108545612A (en) * | 2018-06-25 | 2018-09-18 | 圣邦集团有限公司 | A kind of closed system integrates switching valve and control method |
| CN112096683A (en) * | 2020-09-01 | 2020-12-18 | 宁波斯特林科技有限公司 | Integrated pumping main valve |
-
2018
- 2018-06-25 CN CN201820979133.1U patent/CN208345604U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108545612A (en) * | 2018-06-25 | 2018-09-18 | 圣邦集团有限公司 | A kind of closed system integrates switching valve and control method |
| CN112096683A (en) * | 2020-09-01 | 2020-12-18 | 宁波斯特林科技有限公司 | Integrated pumping main valve |
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