CN203079564U - 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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- CN203079564U CN203079564U CN 201320046028 CN201320046028U CN203079564U CN 203079564 U CN203079564 U CN 203079564U CN 201320046028 CN201320046028 CN 201320046028 CN 201320046028 U CN201320046028 U CN 201320046028U CN 203079564 U CN203079564 U CN 203079564U
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Abstract
The utility model 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 internally comprises a primary winding electric proportional pilot control module, a variable amplitude electric proportional pilot control module, a rotary electric proportional pilot control module, a primary winding brake control module, a rotary brake control module and an oil supply module, the oil supply module is communicated with the primary winding electric proportional pilot control module, the variable amplitude electric proportional pilot control module, the rotary electric proportional pilot control module and the rotary brake control module and used for providing pilot pressure oil fluid for control, and external main valve pressure oil fluid is introduced into the primary winding brake control module. Split type layout of the split type electric proportional pilot control valve and a main valve is adopted so as to reduce the design difficulty and cost of the main valve structure, and also facilitate the integration of other control functions.
Description
Technical field
The utility model relates to engineering machinery field, relates in particular to a kind of split type electric proportion pilot control cock and runabout crane.
Background technology
For the runabout crane that adopts 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 three kinds of forms of electric control operation.Adopt the runabout crane of electric control operation mode, handle is output as the proportional control electric current, and through the commutation of electric proportional pressure-reducing valve decompression back promotion main valve valve rod, the control presssure behind the reducing valve is by the size decision of control current.
In the ordinary course of things, manufacturer is integrated in electric proportional pressure-reducing valve on the main valve usually, and needs the design fuel oil supply unit on the main valve, and needs the complicated inside oil duct of design.This must increase main valve structure Design difficulty, and cost is higher, also is not easy to integrated other controllable function.
The utility model content
The purpose of this utility model is to propose a kind of split type electric proportion pilot control cock and runabout crane, can adopt split type layout with main valve, reduces main valve structure Design difficulty.
For achieving the above object, the utility model provides a kind of split type electric proportion pilot control cock, comprise valve body, wherein, comprise in the 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 control of braking 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, the rotary braking control module communicates, the pilot pressure fluid of control usefulness is provided, and described master winch control of braking module feeds exterior main valve pressure oil liquid.
Further, described fuel oil supply unit comprises first reducing valve and 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 the oil inlet of described first reducing valve and first by pass valve communicates 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 the oil inlet of described master winch electricity proportion pilot control module, luffing electricity proportion pilot control module, the electric proportion pilot control module of revolution and rotary braking control module respectively.
Further, described fuel oil supply unit also comprises 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 the throttling damping, and described throttling damping is arranged between the oil inlet and described guide's oil inlet of described first reducing valve.
Further, described fuel oil supply unit also comprises energy storage, and described energy storage links to each other with the oil outlet of described first reducing valve.
Further, described fuel oil supply unit also comprises the two-position four-way solenoid valve that is used for pilot pressure control, described two-position four-way solenoid valve is arranged between described guide's oil inlet and the 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, getting under the electricity condition, disconnecting the oil circuit of described guide's oil inlet and described guide's return opening.
Further, described fuel oil supply unit also comprises first check valve that is arranged on described guide's oil inlet, and the oil inlet of described first check valve communicates with exterior 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 hydraulic fluid 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; Two oil outlets of described master winch electricity proportion pilot control module communicate with kick up hydraulic fluid port and master winch oil-falling port of described master file respectively, two oil outlets of described luffing electricity proportion pilot control module play hydraulic fluid port with described luffing respectively and the luffing oil-falling port communicates, two oil outlets of the electric proportion pilot control module of described revolution communicate with described first direction revolution hydraulic fluid port and second direction revolution hydraulic fluid port respectively, the oil inlet of described master winch control of braking module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure hydraulic fluid port and described master winch electricity proportion pilot control module respectively, the oil outlet of described master winch control of braking module communicates with described master winch braking hydraulic fluid port, and 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 of two reducing valves arranged side by side and shuttle valve, the oil outlet of described arranged side by side two reducing valves communicates with kick up hydraulic fluid port and master winch oil-falling port of described master file respectively, 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 arranged side by side two reducing valves 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 control of braking module.
Further, described master winch control of braking module comprises the type pilot two position three-way valve and the first band spring non-return valve, the oil outlet of the shuttle valve in guide's hydraulic fluid port of described type pilot two position three-way valve and the described master winch electricity proportion pilot control module communicates, described type pilot two position three-way valve has three actuator ports, respectively with described main valve pressure hydraulic fluid port, the oil inlet of the master winch braking hydraulic fluid port and the first band spring non-return valve communicates, the oil outlet of the described first band spring non-return valve communicates with described guide unloading port, described type pilot two position three-way valve formerly oil diverting port is connected with under the state of pressure oil liquid, connect the oil circuit of described main valve pressure hydraulic fluid port and master winch braking hydraulic fluid port, formerly oil diverting port is not connected with under the state of pressure oil liquid, connects the oil circuit of the oil inlet of described master winch braking hydraulic fluid port and the described first band spring non-return valve.
Further, also comprise in the described valve body with described master winch electricity proportion pilot control module and have the secondary elevator electricity proportion pilot control module of same structure and have the secondary elevator control of braking module of same structure with described master winch control of braking module, 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 control of braking module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure hydraulic fluid port and described secondary elevator electricity proportion pilot control module respectively, and the oil outlet of described secondary elevator control of braking module communicates with described secondary elevator braking hydraulic fluid port.
Further, also be provided with second reducing valve and second check valve between the oil inlet of described master winch control of braking module and secondary elevator control of braking module and the described main valve pressure hydraulic fluid port, the oil inlet of described second reducing valve communicates with described main valve pressure hydraulic fluid port, the oil outlet of described second reducing valve communicates with the oil inlet of described master winch control of braking module and secondary elevator control of braking module respectively, described second check valve and the described second reducing valve reverse parallel connection.
Further, described luffing electricity proportion pilot control module is made of two reducing valves arranged side by side 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 the 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 cooresponding first reducing valve of hydraulic fluid port with described luffing directly communicates with described guide unloading port, is with spring non-return valve to communicate with described guide unloading port with the unloading port of cooresponding first reducing valve of described luffing oil-falling port by described second.
Further, the electric proportion pilot control module of described revolution is made of two reducing valves arranged side by side, the oil outlet of described two reducing valves side by side communicates with described first direction revolution hydraulic fluid port and second direction revolution hydraulic fluid port respectively, the oil inlet of described arranged side by side two reducing valves 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, also comprise arm electricity proportion pilot control module in the described valve body, described valve body comprises that also arm stretches out hydraulic fluid port and arm withdrawal hydraulic fluid port, described arm electricity proportion pilot control module is made of two reducing valves arranged side by side, the oil outlet of described two reducing valves side by side stretches out hydraulic fluid port with described arm respectively and arm withdrawal hydraulic fluid port communicates, the oil inlet of described arranged side by side two reducing valves 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 zero two-position three way magnetic valve of revealing, described two-position three way magnetic valve has three actuator ports, communicate with oil outlet, rotary braking hydraulic fluid port and the guide unloading port of described first reducing valve 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,, connect the oil outlet of described first reducing valve and the oil circuit of rotary braking hydraulic fluid port getting under the electricity condition.
For achieving the above object, the utility model provides a kind of runabout crane, comprises main valve and pilot pressure oil sources, wherein, also comprises the aforesaid split type electric proportion pilot control cock that communicates with described main valve and pilot pressure oil sources respectively.
Based on technique scheme, the utility model adopts split type layout to electric proportion pilot control cock and main valve, special-purpose fuel oil supply unit is set in electric proportion pilot control cock, therefore the needs of the inside oil duct that fuel oil supply unit and complexity are set have been saved in main valve, reduce the structural design difficulty of main valve to the full extent, reduce manufacturing cost, also be convenient to integrated other controllable function of main valve.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of an embodiment of the split type electric proportion pilot control cock of the utility model.
Fig. 2 is the structural representation of another embodiment of the split type electric proportion pilot control cock of the utility model.
Fig. 3 is the structural representation of the another embodiment of the split type electric proportion pilot control cock of the utility model.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 1, be the structural representation of an embodiment of the split type electric proportion pilot control cock of the utility model.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, the electric proportion pilot control module 4 of revolution, master winch control of braking module 5, rotary braking control module 6 and fuel oil supply unit 7 in the valve body 1.
Fuel oil supply unit 7 communicates with master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, the electric proportion pilot control module 4 of revolution, rotary braking control module 6, and the pilot pressure fluid of control usefulness is provided.Master winch control of braking module 5 feeds exterior main valve pressure oil liquid.
Present embodiment adopts split type layout to electric proportion pilot control cock and main valve, special-purpose fuel oil supply unit is set in electric proportion pilot control cock, therefore the needs of the inside oil duct that fuel oil supply unit and complexity are set have been saved in main valve, reduce the structural design difficulty of main valve to the full extent, reduce manufacturing cost, also be convenient to integrated other controllable function of main valve.
As shown in Figure 2, be the structural representation of another embodiment of the split type electric proportion pilot control cock of the utility model.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 oil inlet of the first reducing valve DM and the first by pass valve DBV1 communicates 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 the oil inlet of master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, the electric proportion pilot control module 4 of revolution and rotary braking control module 6 respectively.
Guide's oil inlet 9 communicates with exterior pilot pressure oil circuit, the guide oil pressure that feeds valve body 1 is higher, can not directly lead in master winch electricity proportion pilot control module 2, luffing electricity proportion pilot control module 3, the electric proportion pilot control module 4 of revolution and the rotary braking control module 6, and need guide oil be reduced pressure by the first reducing valve DM, 30bar reduces pressure.And the oil outlet of the first by pass valve DBV1 communicates with guide's return opening of valve body 1, in the time of can avoiding oil pressure in the valve body 1 too high, and carries out the overflow pressure release when surpassing 50bar.
Consider the characteristic of the first reducing valve DM, when feeding guide oil initially for valve body 1, the first reducing valve DM still can not play the effect of decompression, if the oil pressure of the guide oil that feeds this moment is too high, then also need in time to carry out the overflow pressure release, valve body is caused damage to avoid high pressure.Therefore can also comprise the second by pass valve DBV2 in 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 the throttling damping, and the throttling damping is arranged between the oil inlet and guide's oil inlet 9 of the first reducing valve DM.The throttling damping is used to control the flow of the guide oil that is input to the first reducing valve DM, when avoiding flow excessive the first reducing valve DM output characteristic is caused a deviation.
In another embodiment, fuel oil supply unit 7 can also comprise energy storage, and energy storage links to each other with the oil outlet of the first reducing valve DM.Because the first reducing valve DM is responsive to the pressure ratio of guide oil, therefore adopts energy storage to stablize pilot pressure.
In another embodiment, fuel oil supply unit can further include the two-position four-way solenoid valve Y1 that is used for pilot pressure control, two-position four-way solenoid valve Y1 is arranged between guide's oil inlet 9 and the 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, getting under the 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 the control of electric proportion pilot, 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, thereby avoid the maloperation of operating personal, and can reduce the hydraulic efficiency pressure system heating.
On guide's oil inlet 9 first check valve can be set, the oil inlet of first check valve communicates with exterior pilot pressure oil circuit, and the oil outlet of first check valve communicates with guide's oil inlet 9.The effect of first check valve is to close when the fluid counter-flow, prevents that the fluid in the valve body 1 from having influence on exterior guide's oil circuit and guide's oil pump because compression shock generation fluid flows backwards.
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 hydraulic fluid 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.
Two oil outlets of master winch electricity proportion pilot control module 2 communicate with kick up hydraulic fluid port 28 and master winch oil-falling port 27 of master file respectively, 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 that turn round electric proportion pilot control module 4 communicate with first direction revolution hydraulic fluid port 13 and second direction revolution hydraulic fluid port 14 respectively, the oil inlet of master winch control of braking module 5 and guide's hydraulic fluid port communicate with the 3rd oil outlet 29 of main valve pressure hydraulic fluid port 33 and master winch electricity proportion pilot control module 2 respectively, the oil outlet of master winch control of braking module 5 communicates with master winch braking hydraulic fluid port 16, and 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 of two reducing valves arranged side by side and shuttle valve, the oil outlet of two arranged side by side reducing valves communicates with kick up hydraulic fluid port 28 and master winch oil-falling port 27 of master file respectively, 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 communicates with guide's hydraulic fluid port of master winch control of braking module 5 as the 3rd oil outlet of master winch electricity proportion pilot control module 2.
Master winch control of braking module 5 can comprise the type pilot two position three-way valve Y2 and the first band spring non-return valve, the oil outlet of the shuttle valve in guide's hydraulic fluid port of type pilot two position three-way valve Y2 and the master winch electricity proportion pilot control module 2 communicates, type pilot two position three-way valve Y2 has three actuator ports, respectively with main valve pressure hydraulic fluid port 33, the oil inlet of the 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, type pilot two position three-way valve Y2 formerly oil diverting port is connected with under the state of pressure oil liquid, connect the oil circuit of main valve pressure hydraulic fluid port 33 and master winch braking hydraulic fluid port 16, formerly oil diverting port is not connected with under the state of pressure oil liquid, connects the oil circuit of the oil inlet of the 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 be received control mouth on the main valve respectively, and master winch braking hydraulic fluid port 16 can be received the hydraulic fluid port of master winch drg.The guide oil of first reducing valve DM output is passed into master winch electricity proportion pilot control module 2 and the pressure oil liquid of output is controlled rising of master winch respectively or fallen, the pressure oil liquid of reducing valve output is selected high pressure through shuttle valve, the pressure oil liquid of output can be input to guide's hydraulic fluid port of master winch control of braking module 5 by valve inner or extraneous oil circuit, thereby connect the oil circuit of main valve pressure hydraulic fluid port 33 and master winch braking hydraulic fluid port 16, make the control chamber that enters into the master winch drg by the pressure oil of main valve pressure hydraulic fluid port 33 inputs by master winch control of braking module 5.
First effect played of band spring non-return valve be avoid because of the oil pressure 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 the type pilot two position three-way valve Y2, causes the master winch brakeage and causes safety misadventure.
Luffing electricity proportion pilot control module 3 can be made of two reducing valves arranged side by side 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 hydraulic fluid port 20 cooresponding first reducing valve DM with luffing directly communicates with guide unloading port 15, communicates with guide unloading port 15 by the second band spring non-return valve with the unloading port of the luffing oil-falling port 22 cooresponding first reducing valve DM.
Luffing plays hydraulic fluid port 20 and luffing oil-falling port 22 can receive control mouth on the main valve respectively, and the guide oil of first reducing valve DM output is passed into luffing electricity proportion pilot control module 3 and the pressure oil liquid of output is controlled luffing respectively and risen or fall.Can also be connected to by threeway on the luffing balance cock at luffing oil-falling port 22, the control luffing falls to moving, and can prevent that by the second band spring non-return valve leakage passage pressure height from causing the luffing balance cock to convince the safety misadventure that causes by patient analysis.
Turning round electric proportion pilot control module 4 can be made of two reducing valves arranged side by side, the oil outlet of two reducing valves arranged side by side communicates with first direction revolution hydraulic fluid port 13 and second direction revolution hydraulic fluid port 14 respectively, 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 be received the control mouth on the rotary buffering valve respectively, and the guide oil of first reducing valve DM output is passed into the pressure oil liquid that turns round electric proportion pilot control module 4 and export and controls gyratory directions respectively.
Rotary braking control module 6 can comprise the zero two-position three way magnetic valve Y3 that reveals, 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, getting under the 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 the reducing valve DM that wins 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 the split type electric proportion pilot control cock of the utility model.Compare with a last embodiment, also comprise with master winch electricity proportion pilot control module 2 having the secondary elevator electricity proportion pilot control module of same structure and have the secondary elevator control of braking module of same structure in the valve body 1 of present embodiment with master winch control of braking module 5.
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 control of braking module and guide's hydraulic fluid port communicate with the 3rd oil outlet 30 of main valve pressure hydraulic fluid port 33 and secondary elevator electricity proportion pilot control module respectively, and the oil outlet of secondary elevator control of braking module communicates with secondary elevator braking hydraulic fluid port 17.
Secondary hoisting crane hydraulic fluid port 26 and secondary elevator oil-falling port 25 can be received the control mouth on the main valve respectively, and elevator braking hydraulic fluid port 17 can be received the control chamber of secondary hoist brake.The guide oil of first reducing valve DM output is passed into secondary elevator electricity proportion pilot control module and the pressure oil liquid exported is controlled rising of secondary elevator respectively or fall, the pressure oil liquid of reducing valve output is selected high pressure through shuttle valve, the pressure oil liquid of output can be input to guide's hydraulic fluid port of secondary elevator control of braking module by valve inner or extraneous oil circuit, thereby connect the oil circuit of main valve pressure hydraulic fluid port 33 and secondary elevator braking hydraulic fluid port 17, make the control chamber that enters into secondary hoist brake by the pressure oil of main valve pressure hydraulic fluid port 33 inputs by secondary elevator control of braking module.
In another embodiment, can also between the oil inlet of master winch control of braking module 5 and secondary elevator control of braking module and main valve pressure hydraulic fluid port 33, also be provided with second reducing valve and second check valve, the oil inlet of second reducing valve communicates with main valve pressure hydraulic fluid port 33, the oil outlet of second reducing valve communicates with the oil inlet of master winch control of braking module 5 and secondary elevator control of braking module respectively, second check valve and the second reducing valve reverse parallel connection.Second reducing valve is used for the oil pressure of main valve pressure hydraulic fluid port 33 inputs is reduced pressure, to avoid surpassing required pressure fluid to master winch drg and the input of secondary hoist brake.The effect of second check valve is to make the quick oil return of hoist brake, makes the elevator snap catch.
In another embodiment, can also comprise arm electricity proportion pilot control module in the valve body 1, valve body 1 comprises that also arm stretches out hydraulic fluid port 21 and arm withdrawal hydraulic fluid port 24, arm electricity proportion pilot control module is made of two reducing valves arranged side by side, the oil outlet of two reducing valves arranged side by side stretches out hydraulic fluid port 21 with arm respectively and arm withdrawal 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 withdrawal hydraulic fluid port 24 can receive brake port on the main valve respectively, and the guide oil of first reducing valve DM output is passed into arm electricity proportion pilot control module and the pressure oil liquid exported is controlled stretching out of arm respectively or withdraw.
Above a plurality of split type electric proportion pilot control cock embodiment of the present utility model are described, and these split type electric proportion pilot control cock embodiment all can be applied in the various runabout cranes, runabout crane can also comprise the embodiment of above-mentioned any the split type electric proportion pilot control cock that communicates with described main valve and pilot pressure oil sources respectively except comprising main valve and pilot pressure oil sources.Runabout crane of the present utility model is owing to adopted split type layout to electric proportion pilot control cock and main valve, therefore in main valve, need not to design fuel oil supply unit and complicated inside oil duct, therefore than existing integrated form layout, simple relatively on the main valve structure design difficulty, cost is lower, also is convenient to integrated other controllable function.In addition, runabout crane of the present utility model can carry out controllable function such as major-minor elevator, revolution, luffing, hoisting arm expansion integrated as required in split type electric proportion pilot control cock, and is powerful and be easy to use.
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (17)
1. split type electric proportion pilot control cock, comprise valve body, it is characterized in that, comprise in the 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 control of braking 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, the rotary braking control module communicates, the pilot pressure fluid of control usefulness is provided, and described master winch control of braking module feeds exterior 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 first reducing valve and 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 the oil inlet of described first reducing valve and first by pass valve communicates with described guide's oil inlet, the unloading port of described first reducing valve communicates with described guide unloading port, the oil outlet of described first reducing valve respectively 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 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 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 is characterized in that described fuel oil supply unit also comprises the throttling damping, and described throttling damping is arranged between the oil inlet and described guide's oil inlet of described first reducing valve.
5. split type electric proportion pilot control cock according to claim 2 is characterized in that described fuel oil supply unit also comprises energy storage, and described energy storage links to each other 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 that is used for pilot pressure control, described two-position four-way solenoid valve is arranged between described guide's oil inlet and the 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, getting under the electricity condition, disconnect 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 first check valve that is arranged on described guide's oil inlet, the oil inlet of described first check valve communicates with exterior 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 hydraulic fluid 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; Two oil outlets of described master winch electricity proportion pilot control module communicate with kick up hydraulic fluid port and master winch oil-falling port of described master file respectively, two oil outlets of described luffing electricity proportion pilot control module play hydraulic fluid port with described luffing respectively and the luffing oil-falling port communicates, two oil outlets of the electric proportion pilot control module of described revolution communicate with described first direction revolution hydraulic fluid port and second direction revolution hydraulic fluid port respectively, the oil inlet of described master winch control of braking module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure hydraulic fluid port and described master winch electricity proportion pilot control module respectively, the oil outlet of described master winch control of braking module communicates with described master winch braking hydraulic fluid port, and 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 of two reducing valves arranged side by side and shuttle valve, the oil outlet of described arranged side by side two reducing valves communicates with kick up hydraulic fluid port and master winch oil-falling port of described master file respectively, 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 arranged side by side two reducing valves 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 control of braking module.
10. split type electric proportion pilot control cock according to claim 9, it is characterized in that, described master winch control of braking module comprises the type pilot two position three-way valve and the first band spring non-return valve, the oil outlet of the shuttle valve in guide's hydraulic fluid port of described type pilot two position three-way valve and the described master winch electricity proportion pilot control module communicates, described type pilot two position three-way valve has three actuator ports, respectively with described main valve pressure hydraulic fluid port, the oil inlet of the master winch braking hydraulic fluid port and the first band spring non-return valve communicates, the oil outlet of the described first band spring non-return valve communicates with described guide unloading port, described type pilot two position three-way valve formerly oil diverting port is connected with under the state of pressure oil liquid, connect the oil circuit of described main valve pressure hydraulic fluid port and master winch braking hydraulic fluid port, formerly oil diverting port is not connected with under the state of pressure oil liquid, connects the oil circuit of the oil inlet of described master winch braking hydraulic fluid port and the 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 the described valve body with described master winch electricity proportion pilot control module and have the secondary elevator electricity proportion pilot control module of same structure and have the secondary elevator control of braking module of same structure with described master winch control of braking module, 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 control of braking module and guide's hydraulic fluid port communicate with the 3rd oil outlet of described main valve pressure hydraulic fluid port and described secondary elevator electricity proportion pilot control module respectively, and the oil outlet of described secondary elevator control of braking module communicates with described secondary elevator braking hydraulic fluid port.
12. split type electric proportion pilot control cock according to claim 10, it is characterized in that, also be provided with second reducing valve and second check valve between the oil inlet of described master winch control of braking module and secondary elevator control of braking module and the described main valve pressure hydraulic fluid port, the oil inlet of described second reducing valve communicates with described main valve pressure hydraulic fluid port, the oil outlet of described second reducing valve communicates with the oil inlet of described master winch control of braking module and secondary elevator control of braking module respectively, described second check valve and the 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 of two reducing valves arranged side by side 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 the 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 cooresponding first reducing valve of hydraulic fluid port with described luffing directly communicates with described guide unloading port, is with spring non-return valve to communicate with described guide unloading port with the unloading port of cooresponding first reducing valve of described luffing oil-falling port by described second.
14. split type electric proportion pilot control cock according to claim 8, it is characterized in that, the electric proportion pilot control module of described revolution is made of two reducing valves arranged side by side, the oil outlet of described two reducing valves side by side communicates with described first direction revolution hydraulic fluid port and second direction revolution hydraulic fluid port respectively, the oil inlet of described arranged side by side two reducing valves 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, also comprise arm electricity proportion pilot control module in the described valve body, described valve body comprises that also arm stretches out hydraulic fluid port and arm withdrawal hydraulic fluid port, described arm electricity proportion pilot control module is made of two reducing valves arranged side by side, the oil outlet of described two reducing valves side by side stretches out hydraulic fluid port with described arm respectively and arm withdrawal hydraulic fluid port communicates, the oil inlet of described arranged side by side two reducing valves 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.
16. split type electric proportion pilot control cock according to claim 8, it is characterized in that, described rotary braking control module comprises zero two-position three way magnetic valve of revealing, described two-position three way magnetic valve has three actuator ports, communicate with oil outlet, rotary braking hydraulic fluid port and the guide unloading port of described first reducing valve 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, getting under the electricity condition, connect the oil outlet of described first reducing valve and the oil circuit of rotary braking hydraulic fluid port.
17. a runabout crane comprises main valve and pilot pressure oil sources, it is characterized in that, also comprises the arbitrary described split type electric proportion pilot control cock of the claim 1 ~ 16 that communicates with described main valve and pilot pressure oil sources respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046028 CN203079564U (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 |
|---|---|---|---|
| CN 201320046028 CN203079564U (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 |
|---|---|
| CN203079564U true CN203079564U (en) | 2013-07-24 |
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| CN 201320046028 Withdrawn - After Issue CN203079564U (en) | 2013-01-28 | 2013-01-28 | Split type electric proportional pilot control valve and mobile crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103072896A (en) * | 2013-01-28 | 2013-05-01 | 徐州重型机械有限公司 | Split-type electric proportional pilot control valve and mobile crane |
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2013
- 2013-01-28 CN CN 201320046028 patent/CN203079564U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103072896A (en) * | 2013-01-28 | 2013-05-01 | 徐州重型机械有限公司 | Split-type electric proportional pilot control valve and mobile crane |
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