CN103072896B - Split-type electric proportional pilot control valve and mobile crane - Google Patents
Split-type electric proportional pilot control valve and mobile crane Download PDFInfo
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- CN103072896B CN103072896B CN201310031054.XA CN201310031054A CN103072896B CN 103072896 B CN103072896 B CN 103072896B CN 201310031054 A CN201310031054 A CN 201310031054A CN 103072896 B CN103072896 B CN 103072896B
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Abstract
The invention relates to a split-type electric proportional pilot control valve and a mobile crane. The split-type electric proportional pilot control valve comprises a valve body, wherein the valve body comprises a main winch electric proportional pilot control module, a variable amplitude electric proportional pilot control module, a slewing electric proportional pilot control module, a main hoist brake control module, a slewing brake control module and an oil supply module; the oil supply module is communicated with the main winch electric proportional pilot control module, the variable amplitude electric proportional pilot control module, the slewing electric proportional pilot control module and the slewing brake control module and supplies pilot pressure oil used for control; and external master valve pressure oil is introduced into the main hoist brake control module. The control valve and a master valve are arranged in a split-type manner, so that the structural design difficulty and cost of the master valve are reduced, and the integration of other control functions is facilitated.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to a kind of Split type electric proportion pilot control cock and runabout crane.
Background technology
For the runabout crane adopting the transmission of valve control hydraulic efficiency pressure system, each valve rod reversing mode of main valve has mechanical control, hydraulic pilot to handle and electric control operation three kinds of forms.Adopt the runabout crane of electric control operation mode, handle exports as proportional control electric current, and after electric proportional pressure-reducing valve decompression, promote the commutation of main valve valve rod, the control presssure after reducing valve is determined by the size controlling electric current.
In the ordinary course of things, electric proportional pressure-reducing valve is integrated on main valve by manufacturer usually, and main valve needs design fuel oil supply unit, and the internal galleries needing design complicated.This thereby necessarily increases the design difficulty of main valve structure, cost is higher, is also not easy to other controlling functions integrated.
Summary of the invention
The object of the invention is to propose a kind of Split type electric proportion pilot control cock and runabout crane, split type layout can be adopted with main valve, reduce the design difficulty of main valve structure.
For achieving the above object, the invention provides a kind of Split type electric proportion pilot control cock, comprise valve body, wherein, comprise in described valve body: master winch electricity proportion pilot control module, luffing electricity proportion pilot control module, turn round electric proportion pilot control module, master winch brake control module, rotary braking control module and fuel oil supply unit, described fuel oil supply unit and described master winch electricity proportion pilot control module, luffing electricity proportion pilot control module, turn round electric proportion pilot control module, rotary braking control module communicates, the pilot pressure fluid controlled is provided, described master winch brake control module passes into outside main valve pressure oil liquid.
Further, described fuel oil supply unit comprises the first reducing valve and the first by pass valve, described valve body comprises: guide's oil inlet, guide's return opening and guide's drain tap, the oil inlet of described first reducing valve and the oil inlet of the first by pass valve communicate with described guide's oil inlet, the unloading port of described first reducing valve communicates with described guide unloading port, and the oil outlet of described first reducing valve communicates with described master winch electricity proportion pilot control module, luffing electricity proportion pilot control module, the oil inlet that turns round electric proportion pilot control module and rotary braking control module respectively.
Further, described fuel oil supply unit also comprises the second by pass valve, and the oil inlet of described second by pass valve communicates with the oil outlet of described first reducing valve, and the oil outlet of described second by pass valve communicates with described guide unloading port.
Further, described fuel oil supply unit also comprises throttle, and described throttle is arranged between the oil inlet of described first reducing valve and described guide's oil inlet.
Further, described fuel oil supply unit also comprises energy storage, and described energy storage is connected with the oil outlet of described first reducing valve.
Further, described fuel oil supply unit also comprises the two-position four-way solenoid valve controlled for pilot pressure, described two-position four-way solenoid valve is arranged between described guide's oil inlet and described guide's return opening, described two-position four-way solenoid valve is under power failure state, connect the oil circuit of described guide's oil inlet and described guide's return opening, obtaining under electricity condition, disconnect the oil circuit of described guide's oil inlet and described guide's return opening.
Further, described fuel oil supply unit also comprises the first check valve be arranged on described guide's oil inlet, and the oil inlet of described first check valve communicates with outside pilot pressure oil circuit, and the oil outlet of described first check valve communicates with described guide's oil inlet.
Further, described valve body also comprises: kick up hydraulic fluid port, master winch oil-falling port, luffing of main valve pressure oil port, master file plays hydraulic fluid port, luffing oil-falling port, first direction revolution hydraulic fluid port, second direction revolution hydraulic fluid port, master winch braking hydraulic fluid port and rotary braking hydraulic fluid port, kick up with described master file respectively hydraulic fluid port and master winch oil-falling port of two oil outlets of described master winch electricity proportion pilot control module communicates, two oil outlets of described luffing electricity proportion pilot control module play hydraulic fluid port with described luffing respectively and luffing oil-falling port communicates, two oil outlets of described revolution electric proportion pilot control module turn round hydraulic fluid port and second direction respectively and turn round hydraulic fluid port and communicate with described first direction, the oil inlet of described master winch brake control module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure oil port and described master winch electricity proportion pilot control module respectively, oil outlet and the described master winch of described master winch brake control module are braked hydraulic fluid port and are communicated, the oil outlet of described rotary braking control module communicates with described rotary braking hydraulic fluid port.
Further, described master winch electricity proportion pilot control module is made up of arranged side by side two reducing valves and shuttle valve, kick up with described master file respectively hydraulic fluid port and master winch oil-falling port of the oil outlet of described two reducing valves side by side communicates, also communicate with two oil inlets of described shuttle valve respectively, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, the unloading port of described two reducing valves side by side all communicates with described guide unloading port, and the oil outlet of described shuttle valve communicates with guide's hydraulic fluid port of described master winch brake control module.
Further, described master winch brake control module comprises type pilot two position three-way valve and the first band spring non-return valve, guide's hydraulic fluid port of described type pilot two position three-way valve communicates with the oil outlet of the shuttle valve in described master winch electricity proportion pilot control module, described type pilot two position three-way valve has three actuator ports, respectively with described main valve pressure oil port, the oil inlet of master winch braking hydraulic fluid port and the first band spring non-return valve communicates, the oil outlet of described first band spring non-return valve communicates with described guide unloading port, under the state that described type pilot two position three-way valve is connected with pressure oil liquid at first oil diverting port, connect the oil circuit of described main valve pressure oil port and master winch braking hydraulic fluid port, under the state that first oil diverting port is not connected with pressure oil liquid, connect the oil circuit of the oil inlet of described master winch braking hydraulic fluid port and described first band spring non-return valve.
Further, also comprise in described valve body and there is the secondary elevator electricity proportion pilot control module of same structure with described master winch electricity proportion pilot control module and with described master winch brake control module, there is the secondary elevator brake control module of same structure, described valve body also comprises secondary hoisting crane hydraulic fluid port, secondary elevator oil-falling port and secondary elevator braking hydraulic fluid port, the oil inlet of described secondary elevator electricity proportion pilot control module communicates with the oil outlet of described first reducing valve, two oil outlets of described secondary elevator electricity proportion pilot control module communicate with described secondary hoisting crane hydraulic fluid port and secondary elevator oil-falling port respectively, the oil inlet of described secondary elevator brake control module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure oil port and described secondary elevator electricity proportion pilot control module respectively, the oil outlet of described secondary elevator brake control module is braked hydraulic fluid port with described secondary elevator and is communicated.
Further, the second reducing valve and the second check valve is also provided with between the oil inlet of described master winch brake control module and secondary elevator brake control module and described main valve pressure oil port, the oil inlet of described second reducing valve communicates with described main valve pressure oil port, the oil outlet of described second reducing valve communicates with the oil inlet of described master winch brake control module and secondary elevator brake control module respectively, described second check valve and described second reducing valve reverse parallel connection.
Further, described luffing electricity proportion pilot control module is made up of arranged side by side two reducing valves and the second band spring non-return valve, the oil outlet of described two reducing valves side by side plays hydraulic fluid port with described luffing respectively and luffing oil-falling port communicates, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, the unloading port of playing the first reducing valve corresponding to hydraulic fluid port with described luffing directly communicates with described guide unloading port, the unloading port of first reducing valve corresponding with described luffing oil-falling port is with spring non-return valve to communicate with described guide unloading port by described second.
Further, described revolution electric proportion pilot control module is made up of arranged side by side two reducing valves, the oil outlet of described two reducing valves side by side turns round hydraulic fluid port and second direction respectively and turns round hydraulic fluid port and communicate with described first direction, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, and the unloading port of described two reducing valves side by side all communicates with described guide unloading port.
Further, arm electricity proportion pilot control module is also comprised in described valve body, described valve body also comprises arm and stretches out hydraulic fluid port and arm retraction hydraulic fluid port, described arm electricity proportion pilot control module is made up of arranged side by side two reducing valves, the oil outlet of described two reducing valves side by side stretches out hydraulic fluid port with described arm respectively and arm retraction hydraulic fluid port communicates, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, and the unloading port of described two reducing valves side by side all communicates with described guide unloading port.
Further, described rotary braking control module comprises the two-position three way magnetic valve of zero leakage, described two-position three way magnetic valve has three actuator ports, communicate with the oil outlet of described first reducing valve, rotary braking hydraulic fluid port and guide unloading port respectively, described two-position three way magnetic valve is under power failure state, connecting the oil circuit of described rotary braking hydraulic fluid port and guide unloading port, obtaining under electricity condition, connecting the oil outlet of described first reducing valve and the oil circuit of rotary braking hydraulic fluid port.
For achieving the above object, the invention provides a kind of runabout crane, comprise main valve and pilot pressure oil sources, wherein, also comprise the aforesaid Split type electric proportion pilot control cock communicated with described main valve and pilot pressure oil sources respectively.
Based on technique scheme, the present invention adopts split type layout to electric proportion pilot control cock and main valve, in electric proportion pilot control cock, special fuel oil supply unit is set, therefore the needs that fuel oil supply unit and complicated internal galleries are set in main valve are eliminated, reduce the design difficulty on main valve structure to the full extent, reduce manufacturing cost, be also convenient to main valve other controlling functions integrated.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of an embodiment of Split type electric proportion pilot control cock of the present invention.
Fig. 2 is the structural representation of another embodiment of Split type electric proportion pilot control cock of the present invention.
Fig. 3 is the structural representation of the another embodiment of Split type electric proportion pilot control cock of the present invention.
Detailed description of the invention
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 1, be the structural representation of an embodiment of Split type electric proportion pilot control cock of the present invention.In the present embodiment, Split type electric proportion pilot control cock comprises valve body 1, comprises master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, turns round electric proportion pilot control module 4, master winch brake control module 5, rotary braking control module 6 and fuel oil supply unit 7 in valve body 1.
Fuel oil supply unit 7 and master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, turn round electric proportion pilot control module 4, rotary braking control module 6 communicates, and provides the pilot pressure fluid controlled.Master winch brake control module 5 passes into outside main valve pressure oil liquid.
The present embodiment adopts split type layout to electric proportion pilot control cock and main valve, in electric proportion pilot control cock, special fuel oil supply unit is set, therefore the needs that fuel oil supply unit and complicated internal galleries are set in main valve are eliminated, reduce the design difficulty on main valve structure to the full extent, reduce manufacturing cost, be also convenient to main valve other controlling functions integrated.
As shown in Figure 2, be the structural representation of another embodiment of Split type electric proportion pilot control cock of the present invention.In the present embodiment, fuel oil supply unit 7 comprises the first reducing valve DM and the first by pass valve DBV1.Valve body 1 comprises guide's oil inlet 9, guide's return opening 32 and guide's drain tap 15, the oil inlet of the first reducing valve DM and the oil inlet of the first by pass valve DBV1 communicate with guide's oil inlet 9, the unloading port of the first reducing valve DM communicates with guide unloading port 15, and the oil outlet of the first reducing valve DM communicates with master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, the oil inlet that turns round electric proportion pilot control module 4 and rotary braking control module 6 respectively.
Guide's oil inlet 9 communicates with outside pilot pressure oil circuit, the guide oil pressure passing into valve body 1 is higher, directly can not lead to master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, turn round in electric proportion pilot control module 4 and rotary braking control module 6, and need to be reduced pressure to guide oil by the first reducing valve DM, decompression is to 30bar.And the oil outlet of the first by pass valve DBV1 communicates with guide's return opening of valve body 1, when the oil pressure in valve body 1 can be avoided too high, and carrying out overflow pressure relief more than during 50bar.
Consider the characteristic of the first reducing valve DM, when passing into guide oil initially to valve body 1, the first reducing valve DM still can not play the effect of decompression, if the oil pressure of the guide oil now passed into is too high, then also need to carry out overflow pressure relief in time, to avoid high pressure, valve body is caused damage.Therefore can also comprise the second by pass valve DBV2 at fuel oil supply unit 7, the oil inlet of the second by pass valve DBV2 communicates with the oil outlet of the first reducing valve DM, and the oil outlet of the second by pass valve DBV2 communicates with guide unloading port 15.
In another embodiment, fuel oil supply unit 7 can also comprise throttle, between the oil inlet that throttle is arranged on the first reducing valve DM and guide's oil inlet 9.Throttle is used for control inputs to the flow of the guide oil of the first reducing valve DM, causes a deviation when avoiding flow excessive to the first reducing valve DM output characteristic.
In another embodiment, fuel oil supply unit 7 can also comprise energy storage, and energy storage is connected with the oil outlet of the first reducing valve DM.Because the pressure ratio of the first reducing valve DM to guide oil is more responsive, energy storage is therefore adopted to carry out stable pilot pressure.
In another embodiment, fuel oil supply unit can further include the two-position four-way solenoid valve Y1 controlled for pilot pressure, two-position four-way solenoid valve Y1 is arranged between guide's oil inlet 9 and guide's return opening 32, two-position four-way solenoid valve Y1 is under power failure state, connect the oil circuit of guide's oil inlet 9 and guide's return opening 32, obtaining under electricity condition, disconnect the oil circuit of guide's oil inlet 9 and guide's return opening 32.The effect of two-position four-way solenoid valve Y1 is when not carrying out electric proportion pilot and controlling, directly guide oil is led to oil return line from the oil circuit of guide's oil inlet 9 and guide's return opening 32, thus avoid the maloperation of operating personal, and Hydraulic System Fever can be reduced.
Guide's oil inlet 9 can arrange the first check valve, and the oil inlet of the first check valve communicates with outside pilot pressure oil circuit, and the oil outlet of the first check valve communicates with guide's oil inlet 9.The effect of the first check valve is closed when fluid counter-flow, prevents the fluid in valve body 1 because compression shock generation fluid flows backwards and have influence on outside guide's oil circuit and guide's oil pump.
In another embodiment, valve body 1 can also comprise: kick up hydraulic fluid port 28, master winch oil-falling port 27, luffing of main valve pressure oil port 33, master file plays hydraulic fluid port 20, luffing oil-falling port 22, first direction revolution hydraulic fluid port 13, second direction revolution hydraulic fluid port 14, master winch braking hydraulic fluid port 16 and rotary braking hydraulic fluid port 17.
Kick up with master file respectively hydraulic fluid port 28 and master winch oil-falling port 27 of two oil outlets of master winch electricity proportion pilot control module 2 communicates, two oil outlets of luffing electricity proportion pilot control module 3 play hydraulic fluid port 20 with luffing respectively and luffing oil-falling port 22 communicates, two oil outlets turning round electric proportion pilot control module 4 turn round hydraulic fluid port 13 and second direction respectively and turn round hydraulic fluid port 14 and communicate with first direction, the oil inlet of master winch brake control module 5 and guide's hydraulic fluid port communicate with the 3rd oil outlet 29 of main valve pressure oil port 33 and master winch electricity proportion pilot control module 2 respectively, oil outlet and the master winch of master winch brake control module 5 are braked hydraulic fluid port 16 and are communicated, the oil outlet of rotary braking control module 6 communicates with rotary braking hydraulic fluid port 17.
On the concrete structure of master winch electricity proportion pilot control module 2, master winch electricity proportion pilot control module 2 can be made up of arranged side by side two reducing valves and shuttle valve, kick up with master file respectively hydraulic fluid port 28 and master winch oil-falling port 27 of the oil outlet of two arranged side by side reducing valves communicates, also communicate with two oil inlets of shuttle valve respectively, the oil inlet of two reducing valves arranged side by side all communicates with the oil outlet of the first reducing valve DM, the unloading port of two reducing valves arranged side by side all communicates with guide unloading port 15, the oil outlet 29 of shuttle valve is as the 3rd oil outlet of master winch electricity proportion pilot control module 2, communicate with guide's hydraulic fluid port of master winch brake control module 5.
Master winch brake control module 5 can comprise type pilot two position three-way valve Y2 and first band spring non-return valve, guide's hydraulic fluid port of type pilot two position three-way valve Y2 communicates with the oil outlet of the shuttle valve in master winch electricity proportion pilot control module 2, type pilot two position three-way valve Y2 has three actuator ports, respectively with main valve pressure oil port 33, the oil inlet of master winch braking hydraulic fluid port 16 and the first band spring non-return valve communicates, the oil outlet of the first band spring non-return valve communicates with guide unloading port 15, under the state that type pilot two position three-way valve Y2 is connected with pressure oil liquid at first oil diverting port, connect the oil circuit of main valve pressure oil port 33 and master winch braking hydraulic fluid port 16, under the state that first oil diverting port is not connected with pressure oil liquid, connect the oil circuit of the oil inlet of master winch braking hydraulic fluid port 16 and the first band spring non-return valve.
Kick up hydraulic fluid port 28 and master winch oil-falling port 27 of master file can receive control mouth on main valve respectively, and master winch braking hydraulic fluid port 16 can receive the hydraulic fluid port of master winch drg.The pressure oil liquid that the guide oil that first reducing valve DM exports is passed into master winch electricity proportion pilot control module 2 and exports controls rising or falling of master winch respectively, the pressure oil liquid that reducing valve exports selects high pressure through shuttle valve, the pressure oil liquid of output can be input to guide's hydraulic fluid port of master winch brake control module 5 by the oil circuit in valve inner or the external world, thus connect the oil circuit of main valve pressure oil port 33 and master winch braking hydraulic fluid port 16, make the pressure oil inputted by main valve pressure oil port 33 be entered into the control chamber of master winch drg by master winch brake control module 5.
The effect that first band spring non-return valve plays avoids the oil pressure because of emptying oil circuit too high, the fluid of emptying oil circuit flow into the control chamber of master winch drg by the oil circuit in type pilot two position three-way valve Y2, cause master winch brakeage and cause safety misadventure.
Luffing electricity proportion pilot control module 3 can be made up of arranged side by side two reducing valves and the second band spring non-return valve, the oil outlet of two reducing valves arranged side by side plays hydraulic fluid port 20 with luffing respectively and luffing oil-falling port 22 communicates, the oil inlet of two reducing valves arranged side by side all communicates with the oil outlet of the first reducing valve DM, the unloading port of playing the first reducing valve DM corresponding to hydraulic fluid port 20 with luffing directly communicates with guide unloading port 15, and the unloading port of the first reducing valve DM corresponding with luffing oil-falling port 22 is with spring non-return valve to communicate with guide unloading port 15 by second.
Luffing plays hydraulic fluid port 20 and luffing oil-falling port 22 can receive control mouth on main valve respectively, and the pressure oil liquid that the guide oil that the first reducing valve DM exports is passed into luffing electricity proportion pilot control module 3 and exports controls luffing respectively and rises or fall.Can also be connected to by threeway on luffing balance cock at luffing oil-falling port 22, control luffing and to fall action, leakage passage pressure can be prevented high by the second band spring non-return valve and cause luffing balance cock to convince the safety misadventure caused by patient analysis.
Turn round electric proportion pilot control module 4 to be made up of arranged side by side two reducing valves, the oil outlet of two arranged side by side reducing valves turns round hydraulic fluid port 13 and second direction respectively and turns round hydraulic fluid port 14 and communicate with first direction, the oil inlet of two reducing valves arranged side by side all communicates with the oil outlet of the first reducing valve DM, and the unloading port of two reducing valves arranged side by side all communicates with guide unloading port 15.
First direction revolution hydraulic fluid port 13 and second direction revolution hydraulic fluid port 14 can receive the control mouth on rotary buffering valve respectively, and the pressure oil liquid that the guide oil that the first reducing valve DM exports is passed into the electric proportion pilot control module 4 of revolution and exports controls gyratory directions respectively.
Rotary braking control module 6 can comprise the two-position three way magnetic valve Y3 of zero leakage, two-position three way magnetic valve Y3 has three actuator ports, respectively with the oil outlet of the first reducing valve DM, rotary braking hydraulic fluid port 12 and guide unloading port 15 communicate, two-position three way magnetic valve Y3 is under power failure state, connect the oil circuit of rotary braking hydraulic fluid port 12 and guide unloading port 15, obtaining under electricity condition, connect the oil outlet of the first reducing valve DM and the oil circuit of rotary braking hydraulic fluid port 12, the pressure oil liquid that first reducing valve DM is exported enters into the control chamber of trainstop by rotary braking control module 6.
As shown in Figure 3, be the structural representation of the another embodiment of Split type electric proportion pilot control cock of the present invention.Compared with a upper embodiment, also comprise the electric proportion pilot control module 2 with master winch in the valve body 1 of the present embodiment and there is the secondary elevator electricity proportion pilot control module of same structure and with master winch brake control module 5, there is the secondary elevator brake control module of same structure.
Valve body 1 can also comprise secondary hoisting crane hydraulic fluid port 26, secondary elevator oil-falling port 25 and secondary elevator braking hydraulic fluid port 17, the oil inlet of secondary elevator electricity proportion pilot control module communicates with the oil outlet of the first reducing valve DM, two oil outlets of secondary elevator electricity proportion pilot control module communicate with secondary hoisting crane hydraulic fluid port 26 and secondary elevator oil-falling port 25 respectively, the oil inlet of secondary elevator brake control module and guide's hydraulic fluid port communicate with the 3rd oil outlet 30 of main valve pressure oil port 33 and secondary elevator electricity proportion pilot control module respectively, the oil outlet of secondary elevator brake control module is braked hydraulic fluid port 17 with secondary elevator and is communicated.
Secondary hoisting crane hydraulic fluid port 26 and secondary elevator oil-falling port 25 can receive the control mouth on main valve respectively, and elevator braking hydraulic fluid port 17 can receive the control chamber of secondary hoist brake.The pressure oil liquid that the guide oil that first reducing valve DM exports is passed into secondary elevator electricity proportion pilot control module and exports controls rising or falling of secondary elevator respectively, the pressure oil liquid that reducing valve exports selects high pressure through shuttle valve, the pressure oil liquid of output can be input to guide's hydraulic fluid port of secondary elevator brake control module by the oil circuit in valve inner or the external world, thus connect the oil circuit of main valve pressure oil port 33 and secondary elevator braking hydraulic fluid port 17, make the pressure oil inputted by main valve pressure oil port 33 be entered into the control chamber of secondary hoist brake by secondary elevator brake control module.
In another embodiment, the second reducing valve and the second check valve can also be also provided with between the oil inlet of master winch brake control module 5 and secondary elevator brake control module and main valve pressure oil port 33, the oil inlet of the second reducing valve communicates with main valve pressure oil port 33, the oil outlet of the second reducing valve communicates with the oil inlet of master winch brake control module 5 and secondary elevator brake control module respectively, the second check valve and the second reducing valve reverse parallel connection.The oil pressure that second reducing valve is used for main valve pressure oil port 33 inputs reduces pressure, to avoid exceeding required pressure fluid to master winch drg and the input of secondary hoist brake.The effect of the second check valve makes the quick oil return of hoist brake, makes elevator snap catch.
In another embodiment, arm electricity proportion pilot control module can also be comprised in valve body 1, valve body 1 also comprises arm and stretches out hydraulic fluid port 21 and arm retraction hydraulic fluid port 24, arm electricity proportion pilot control module is made up of arranged side by side two reducing valves, the oil outlet of two reducing valves arranged side by side stretches out hydraulic fluid port 21 with arm respectively and arm retraction hydraulic fluid port 24 communicates, the oil inlet of two reducing valves arranged side by side all communicates with the oil outlet of the first reducing valve DM, and the unloading port of two reducing valves arranged side by side all communicates with guide unloading port 15.
Arm stretches out hydraulic fluid port 21 and arm retraction hydraulic fluid port 24 can receive brake port on main valve respectively, and the pressure oil liquid that the guide oil that the first reducing valve DM exports is passed into arm electricity proportion pilot control module and exports controls stretching out of arm respectively or retracts.
Above multiple Split type electric proportion pilot control cock embodiment of the present invention is described, and these Split type electric proportion pilot control cock embodiments all can be applied in various runabout crane, runabout crane, except comprising main valve and pilot pressure oil sources, can also comprise the embodiment of any one the Split type electric proportion pilot control cock above-mentioned communicated with described main valve and pilot pressure oil sources respectively.Runabout crane of the present invention is owing to have employed split type layout to electric proportion pilot control cock and main valve, therefore in main valve without the need to designing the internal galleries of fuel oil supply unit and complexity, therefore compared to existing integrated form layout, relatively simple in main valve structure design difficulty, cost is lower, is also convenient to other controlling functions integrated.In addition, the controlling functions such as major-minor elevator, revolution, luffing, hoisting arm expansion can carry out integrated by runabout crane of the present invention as required in Split type electric proportion pilot control cock, powerful and be easy to application.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (17)
1. a Split type electric proportion pilot control cock, comprise valve body, it is characterized in that, comprise in described valve body: master winch electricity proportion pilot control module, luffing electricity proportion pilot control module, turn round electric proportion pilot control module, master winch brake control module, rotary braking control module and fuel oil supply unit, described fuel oil supply unit and described master winch electricity proportion pilot control module, luffing electricity proportion pilot control module, turn round electric proportion pilot control module, rotary braking control module communicates, the pilot pressure fluid controlled is provided, described master winch brake control module passes into outside main valve pressure oil liquid.
2. Split type electric proportion pilot control cock according to claim 1, it is characterized in that, described fuel oil supply unit comprises the first reducing valve and the first by pass valve, described valve body comprises: guide's oil inlet, guide's return opening and guide's drain tap, the oil inlet of described first reducing valve and the oil inlet of the first by pass valve communicate with described guide's oil inlet, the unloading port of described first reducing valve communicates with described guide unloading port, the oil outlet electric proportion pilot control module with described master winch respectively of described first reducing valve, luffing electricity proportion pilot control module, the oil inlet turning round electric proportion pilot control module and rotary braking control module communicates.
3. Split type electric proportion pilot control cock according to claim 2, it is characterized in that, described fuel oil supply unit also comprises the second by pass valve, and the oil inlet of described second by pass valve communicates with the oil outlet of described first reducing valve, and the oil outlet of described second by pass valve communicates with described guide unloading port.
4. Split type electric proportion pilot control cock according to claim 2, it is characterized in that, described fuel oil supply unit also comprises throttle, and described throttle is arranged between the oil inlet of described first reducing valve and described guide's oil inlet.
5. Split type electric proportion pilot control cock according to claim 2, it is characterized in that, described fuel oil supply unit also comprises energy storage, and described energy storage is connected with the oil outlet of described first reducing valve.
6. Split type electric proportion pilot control cock according to claim 2, it is characterized in that, described fuel oil supply unit also comprises the two-position four-way solenoid valve controlled for pilot pressure, described two-position four-way solenoid valve is arranged between described guide's oil inlet and described guide's return opening, described two-position four-way solenoid valve is under power failure state, connecting the oil circuit of described guide's oil inlet and described guide's return opening, obtaining under electricity condition, disconnecting the oil circuit of described guide's oil inlet and described guide's return opening.
7. Split type electric proportion pilot control cock according to claim 2, it is characterized in that, described fuel oil supply unit also comprises the first check valve be arranged on described guide's oil inlet, the oil inlet of described first check valve communicates with outside pilot pressure oil circuit, and the oil outlet of described first check valve communicates with described guide's oil inlet.
8. according to the arbitrary described Split type electric proportion pilot control cock of claim 2 ~ 7, it is characterized in that, described valve body also comprises: kick up hydraulic fluid port, master winch oil-falling port, luffing of main valve pressure oil port, master file plays hydraulic fluid port, luffing oil-falling port, first direction revolution hydraulic fluid port, second direction revolution hydraulic fluid port, master winch braking hydraulic fluid port and rotary braking hydraulic fluid port, kick up with described master file respectively hydraulic fluid port and master winch oil-falling port of two oil outlets of described master winch electricity proportion pilot control module communicates, two oil outlets of described luffing electricity proportion pilot control module play hydraulic fluid port with described luffing respectively and luffing oil-falling port communicates, two oil outlets of described revolution electric proportion pilot control module turn round hydraulic fluid port and second direction respectively and turn round hydraulic fluid port and communicate with described first direction, the oil inlet of described master winch brake control module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure oil port and described master winch electricity proportion pilot control module respectively, oil outlet and the described master winch of described master winch brake control module are braked hydraulic fluid port and are communicated, the oil outlet of described rotary braking control module communicates with described rotary braking hydraulic fluid port.
9. Split type electric proportion pilot control cock according to claim 8, it is characterized in that, described master winch electricity proportion pilot control module is made up of arranged side by side two reducing valves and shuttle valve, kick up with described master file respectively hydraulic fluid port and master winch oil-falling port of the oil outlet of described two reducing valves side by side communicates, also communicate with two oil inlets of described shuttle valve respectively, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, the unloading port of described two reducing valves side by side all communicates with described guide unloading port, the oil outlet of described shuttle valve communicates with guide's hydraulic fluid port of described master winch brake control module.
10. Split type electric proportion pilot control cock according to claim 9, it is characterized in that, described master winch brake control module comprises type pilot two position three-way valve and the first band spring non-return valve, guide's hydraulic fluid port of described type pilot two position three-way valve communicates with the oil outlet of the shuttle valve in described master winch electricity proportion pilot control module, described type pilot two position three-way valve has three actuator ports, respectively with described main valve pressure oil port, the oil inlet of master winch braking hydraulic fluid port and the first band spring non-return valve communicates, the oil outlet of described first band spring non-return valve communicates with described guide unloading port, under the state that described type pilot two position three-way valve is connected with pressure oil liquid at first oil diverting port, connect the oil circuit of described main valve pressure oil port and master winch braking hydraulic fluid port, under the state that first oil diverting port is not connected with pressure oil liquid, connect the oil circuit of the oil inlet of described master winch braking hydraulic fluid port and described first band spring non-return valve.
11. Split type electric proportion pilot control cock according to claim 10, it is characterized in that, also comprise in described valve body and there is the secondary elevator electricity proportion pilot control module of same structure with described master winch electricity proportion pilot control module and with described master winch brake control module, there is the secondary elevator brake control module of same structure, described valve body also comprises secondary hoisting crane hydraulic fluid port, secondary elevator oil-falling port and secondary elevator braking hydraulic fluid port, the oil inlet of described secondary elevator electricity proportion pilot control module communicates with the oil outlet of described first reducing valve, two oil outlets of described secondary elevator electricity proportion pilot control module communicate with described secondary hoisting crane hydraulic fluid port and secondary elevator oil-falling port respectively, the oil inlet of described secondary elevator brake control module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure oil port and described secondary elevator electricity proportion pilot control module respectively, the oil outlet of described secondary elevator brake control module is braked hydraulic fluid port with described secondary elevator and is communicated.
12. Split type electric proportion pilot control cock according to claim 10, it is characterized in that, the second reducing valve and the second check valve is also provided with between the oil inlet of described master winch brake control module and secondary elevator brake control module and described main valve pressure oil port, the oil inlet of described second reducing valve communicates with described main valve pressure oil port, the oil outlet of described second reducing valve communicates with the oil inlet of described master winch brake control module and secondary elevator brake control module respectively, described second check valve and described second reducing valve reverse parallel connection.
13. Split type electric proportion pilot control cock according to claim 8, it is characterized in that, described luffing electricity proportion pilot control module is made up of arranged side by side two reducing valves and the second band spring non-return valve, the oil outlet of described two reducing valves side by side plays hydraulic fluid port with described luffing respectively and luffing oil-falling port communicates, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, the unloading port of playing the first reducing valve corresponding to hydraulic fluid port with described luffing directly communicates with described guide unloading port, the unloading port of first reducing valve corresponding with described luffing oil-falling port is with spring non-return valve to communicate with described guide unloading port by described second.
14. Split type electric proportion pilot control cock according to claim 8, it is characterized in that, described revolution electric proportion pilot control module is made up of arranged side by side two reducing valves, the oil outlet of described two reducing valves side by side turns round hydraulic fluid port and second direction respectively and turns round hydraulic fluid port and communicate with described first direction, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, and the unloading port of described two reducing valves side by side all communicates with described guide unloading port.
15. Split type electric proportion pilot control cock according to claim 8, it is characterized in that, arm electricity proportion pilot control module is also comprised in described valve body, described valve body also comprises arm and stretches out hydraulic fluid port and arm retraction hydraulic fluid port, described arm electricity proportion pilot control module is made up of arranged side by side two reducing valves, the oil outlet of described two reducing valves side by side stretches out hydraulic fluid port with described arm respectively and arm retraction hydraulic fluid port communicates, the oil inlet of described two reducing valves side by side all communicates with the oil outlet of described first reducing valve, the unloading port of described two reducing valves side by side all communicates with described guide unloading port.
16. Split type electric proportion pilot control cock according to claim 8, it is characterized in that, described rotary braking control module comprises the two-position three way magnetic valve of zero leakage, described two-position three way magnetic valve has three actuator ports, communicate with the oil outlet of described first reducing valve, rotary braking hydraulic fluid port and guide unloading port respectively, described two-position three way magnetic valve is under power failure state, connect the oil circuit of described rotary braking hydraulic fluid port and guide unloading port, obtaining under electricity condition, connect the oil outlet of described first reducing valve and the oil circuit of rotary braking hydraulic fluid port.
17. 1 kinds of runabout cranes, comprise main valve and pilot pressure oil sources, it is characterized in that, also comprise the arbitrary described Split type electric proportion pilot control cock of the claim 1 ~ 16 communicated with described main valve and pilot pressure oil sources respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310031054.XA CN103072896B (en) | 2013-01-28 | 2013-01-28 | Split-type electric proportional pilot control valve and mobile crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310031054.XA CN103072896B (en) | 2013-01-28 | 2013-01-28 | Split-type electric proportional pilot control valve and mobile crane |
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| Publication Number | Publication Date |
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| CN103072896A CN103072896A (en) | 2013-05-01 |
| CN103072896B true CN103072896B (en) | 2015-04-22 |
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| CN201310031054.XA Expired - Fee Related CN103072896B (en) | 2013-01-28 | 2013-01-28 | Split-type electric proportional pilot control valve and mobile crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110905881A (en) * | 2019-12-24 | 2020-03-24 | 江苏科迈液压控制系统有限公司 | Pilot module for electro-hydraulic compound control and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4166604B2 (en) * | 2003-03-26 | 2008-10-15 | 日立住友重機械建機クレーン株式会社 | Winch speed control device and crane |
| CN201105952Y (en) * | 2007-08-08 | 2008-08-27 | 徐州重型机械有限公司 | Telescopic boom crane lift hook lifting compensating gear |
| DE102008024512B4 (en) * | 2008-05-21 | 2010-08-12 | Manitowoc Crane Group France Sas | Electrohydraulic leak compensation |
| CN203079564U (en) * | 2013-01-28 | 2013-07-24 | 徐州重型机械有限公司 | Split type electric proportional pilot control valve and mobile crane |
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Address after: 221001 Jiangsu city of Xuzhou Province Economic and Technological Development Zone of High Road No. 68 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Patentee before: Xuzhou Heavy Machinery Co., Ltd. |
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Granted publication date: 20150422 Termination date: 20200128 |