CN107117534B - A kind of hydraulic control system of crane - Google Patents
A kind of hydraulic control system of crane Download PDFInfo
- Publication number
- CN107117534B CN107117534B CN201710193528.9A CN201710193528A CN107117534B CN 107117534 B CN107117534 B CN 107117534B CN 201710193528 A CN201710193528 A CN 201710193528A CN 107117534 B CN107117534 B CN 107117534B
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- hydraulic
- fluid port
- valve
- hydraulic fluid
- control valve
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a kind of hydraulic control systems of crane, belong to field of hydraulic control.The hydraulic control system includes revolution valve group and winch valve group, revolution valve group includes the rotary fluid motor for driving crane rotation, first control valve, winch valve group includes winch hydraulic motor, second control valve and reset control valve, by the way that the second hydraulic fluid port of winch hydraulic motor is connected to the first hydraulic fluid port for resetting control valve, the second hydraulic fluid port for resetting control valve is connected to the first hydraulic fluid port of rotary fluid motor or the second hydraulic fluid port, winch hydraulic motor is used to drive the main hoisting mechanism of crane, auxiliary hoisting mechanism or jib lubbing mechanism, so that the hydraulic oil in the pipeline of winch valve group is under pressure, it is pressed into rotary fluid motor, to drive rotary fluid motor to rotate, to drive turntable to be resetted, rotary fluid motor also rotates together simultaneously, it is gradually reduced weight or boom under the effect of gravity, it completes to reset.
Description
Technical field
The present invention relates to field of hydraulic control, in particular to a kind of hydraulic control system of crane.
Background technique
Crane is a kind of common engineering machinery, is widely used in the industries such as transport, building.
Crane has generally included lifting mechanism, jib lubbing mechanism and swing mechanism.In crane, lifting mechanism, luffing
Mechanism and swing mechanism are both provided with independent hydraulic motor, in lifting mechanism, control weight by the rotation of hydraulic motor
Lifting and decentralization, in jib lubbing mechanism, by hydraulic motor rotation control boom pitching pass through in swing mechanism
The revolution of the rotation control turntable of hydraulic motor.
During the work time, if there is the emergency of power interruption suddenly, crane will run out of steam crane,
Lifting mechanism, jib lubbing mechanism and swing mechanism all can be by corresponding arrestment mechanism emergency brakings, to avoid occurring under weight, boom
The dangerous situation fallen.After emergency braking, operator needs to operate crane and resets, and control lifting mechanism makes weight
Ground is transferred to, control jib lubbing mechanism makes boom transfer to extreme lower position, and control swing mechanism makes turntable rotate back into initial position.
The emergency motor for reset is typically provided in existing crane, when there is power interruption, urgent telegram is answered in starting
Machine is resetted by emergency motor-driven hydraulic pumps to hydraulic motor fuel feeding to control crane.Setting emergency motor is not
It only needs that emergency operations system is arranged, but also needs to consume more additional energy source, design cost and operating cost are all higher.
Summary of the invention
In order to solve the problems, such as conventional hoist in case of emergency carry out reset cost it is higher, the embodiment of the present invention provide
A kind of hydraulic control system of crane.The technical solution is as follows:
The embodiment of the invention provides a kind of hydraulic control system of crane, the hydraulic control system includes revolving valve
Group and at least one winch valve group, the revolution valve group include for driving the rotary fluid motor of crane rotation, the first control
Valve processed, the first hydraulic fluid port of the rotary fluid motor are connected to the A mouth of first control valve, the B mouth of first control valve
It being connected to the first hydraulic fluid port of system, the second hydraulic fluid port of the rotary fluid motor is connected to the C mouth of first control valve, and described
The D mouth of one control valve is connected to the second hydraulic fluid port of system, and first control valve is for selectively communicating with the hydraulic horse of revolution
The first hydraulic fluid port for reaching and first hydraulic fluid port of system and disconnect the rotary fluid motor the second hydraulic fluid port and the system second
Hydraulic fluid port, or disconnect the first hydraulic fluid port of the rotary fluid motor and first hydraulic fluid port of system and be connected to and described turn round hydraulic horse
The second hydraulic fluid port for reaching and second hydraulic fluid port of system, or the first hydraulic fluid port and the system the of the connection rotary fluid motor
One hydraulic fluid port and the second hydraulic fluid port and second hydraulic fluid port of system, first hydraulic fluid port of system and the institute for being connected to the rotary fluid motor
One in the second hydraulic fluid port of system is stated for, system first hydraulic fluid port and the system oily to the revolution valve group input hydraulic pressure
Another in second hydraulic fluid port is used to for the hydraulic oil in the revolution valve group being discharged, and the winch valve group includes the hydraulic horse of winch
It reaches, the second control valve and reset control valve, the winch hydraulic motor are used to drive the main hoisting mechanism of the crane, secondary
It rises mechanism or jib lubbing mechanism, the first hydraulic fluid port of the winch hydraulic motor is connected to system third hydraulic fluid port, the winch is hydraulic
Second hydraulic fluid port of motor is connected to the first hydraulic fluid port of second control valve, the second hydraulic fluid port of second control valve and system the
The connection of four hydraulic fluid ports, second control valve for selectively switching between the first state and a second state, when described second
When control valve is in the first state, the second hydraulic fluid port of the winch hydraulic motor and the 4th hydraulic fluid port forward conduction of system
And reversed cut-off, when second control valve is in second state, the second hydraulic fluid port of the winch hydraulic motor and institute
The 4th hydraulic fluid port bidirectionally conductive of system is stated, one in the 4th hydraulic fluid port of the system third hydraulic fluid port and the system is used for the strand
Vehicle valve group input hydraulic pressure is oily, another in the 4th hydraulic fluid port of the system third hydraulic fluid port and the system is used for the winch valve
Hydraulic oil discharge in group, the second hydraulic fluid port of the winch hydraulic motor are connected to first hydraulic fluid port for resetting control valve, institute
The second hydraulic fluid port for stating reset control valve is connected to the first hydraulic fluid port of the rotary fluid motor or the second hydraulic fluid port, the reset control
Valve processed is for being connected to or disconnecting the winch hydraulic motor and the rotary fluid motor.
When realization, the hydraulic control system includes three winch valve groups, the winch in three winch valve groups
Hydraulic motor is respectively used to drive the main hoisting mechanism, auxiliary hoisting mechanism and jib lubbing mechanism of the crane.
Further, the hydraulic control system further includes third control valve and shut-off valve, described to reset the of control valve
Two hydraulic fluid ports are connected to the oil inlet of the third control valve, the oil outlet of the third control valve and the rotary fluid motor
First hydraulic fluid port or the connection of the second hydraulic fluid port, the third control valve are used to be connected to or disconnect second hydraulic fluid port for resetting control valve
With the rotary fluid motor, second hydraulic fluid port for resetting control valve is also connected to the oil inlet of the shut-off valve, and described section
Only the oil outlet of valve is connected to fuel tank.
Further, the hydraulic control system further includes accumulator, and the accumulator is fuel-displaced with the shut-off valve
Mouth connection.
Preferably, the hydraulic control system further includes the first safety valve, the oil inlet of first safety valve with it is described
The oil outlet of shut-off valve is connected to, and the oil outlet of first safety valve is connected to the fuel tank, the guide of first safety valve
Mouth is connected to the oil outlet of the shut-off valve.
Optionally, the hydraulic control system further includes hand pump, and the oil inlet of the hand pump is connected to fuel tank, described
The oil outlet of hand pump is connected to second hydraulic fluid port for resetting control valve.
Further, the hydraulic control system further includes pressure charging valve, and the oil inlet of the pressure charging valve and the reset are controlled
Second hydraulic fluid port of valve processed is connected to, the first hydraulic fluid port or the second hydraulic fluid port of the oil outlet of the pressure charging valve and the rotary fluid motor
Connection.
Further, the hydraulic control system further includes the second safety valve, the oil inlet of second safety valve and institute
The oil inlet connection of pressure charging valve is stated, the oil outlet of second safety valve is connected to fuel tank, the pilot port of second safety valve
It is connected to the oil inlet of the pressure charging valve.
Further, the hydraulic control system further includes throttle valve, the oil inlet of the throttle valve and described second
The oil inlet of safety valve is connected to, and the oil outlet of the throttle valve is connected to the fuel tank.
Preferably, the hydraulic control system further includes the 4th control valve, the oil outlet of the third control valve with it is described
The oil inlet of 4th control valve is connected to, the first oil outlet of the 4th control valve and the first hydraulic fluid port of the rotary fluid motor
Connection, the second oil outlet of the 4th control valve are connected to the second hydraulic fluid port of the rotary fluid motor, the 4th control
Valve is used to selectively communicate with the oil outlet of the third control valve and the first hydraulic fluid port or described of the rotary fluid motor
Second hydraulic fluid port of the oil outlet of third control valve and the rotary fluid motor.
Technical solution provided in an embodiment of the present invention has the benefit that by oily by the first of winch hydraulic motor
Mouth is connected to system third hydraulic fluid port, and the second hydraulic fluid port of winch hydraulic motor is connected to the first hydraulic fluid port of the second control valve, the second control
Second hydraulic fluid port of valve processed is connected to the 4th hydraulic fluid port of system, and the second control valve property of can choose in first state and the second state
Between switch, allow to change by the second control valve the side that the second hydraulic fluid port of hydraulic motor is connected with the 4th hydraulic fluid port of system
To when the second control valve is in first state, hydraulic oil is discharged in system third hydraulic fluid port, and the 4th hydraulic fluid port input hydraulic pressure oil of system can
To realize the rotating forward of winch hydraulic motor, when the second control valve is in the second state, system third hydraulic fluid port input hydraulic pressure oil, system
Hydraulic oil is discharged in 4th hydraulic fluid port, and the reversion of winch hydraulic motor may be implemented, so as to pass through winch hydraulic motor control master
Lifting mechanism, auxiliary hoisting mechanism or jib lubbing mechanism work, by power interruption, making the second control valve be in the first shape
State, at this time the second hydraulic fluid port of winch hydraulic motor and the 4th hydraulic fluid port of system can only forward conduction, and reversely end, can prevent here
When hydraulic oil flow back oil-feed tank via the 4th hydraulic fluid port of system, by by the second hydraulic fluid port of winch hydraulic motor and resetting control valve
The connection of first hydraulic fluid port, resets the second hydraulic fluid port of control valve and is connected to the first hydraulic fluid port of rotary fluid motor or the second hydraulic fluid port, twists
Vehicle hydraulic motor is used to drive the main hoisting mechanism, auxiliary hoisting mechanism or jib lubbing mechanism of crane, so that the pipe of winch valve group
Hydraulic oil in road is pressed into revolution under pressure effect (pressure that the self weight of pressure or boom that hoisting heavy generates generates)
Hydraulic motor, to drive rotary fluid motor to rotate, to drive turntable to be resetted, while rotary fluid motor also turns together
It is dynamic, it is gradually reduced weight or boom under the effect of gravity, completes to reset, due to being utilized in lifting mechanism or jib lubbing mechanism
Gravitional force completes the reset of turntable, and while turntable resets, lifting mechanism or jib lubbing mechanism are also resetted, and are not required to
Other energy are consumed, therefore do not need setting emergency motor, reduce the cost of design and operation.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of the hydraulic control system of crane provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the hydraulic control system of another crane provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the hydraulic control system of another crane provided in an embodiment of the present invention；
Fig. 4 is the enlarged diagram of the 4th control valve in Fig. 3；
Fig. 5 is the structural schematic diagram of the hydraulic control system of another crane provided in an embodiment of the present invention；
Fig. 6 is the enlarged diagram of the 5th control valve in Fig. 5.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of structural schematic diagram of the hydraulic control system of crane provided in an embodiment of the present invention, such as Fig. 1 institute
Show, which includes that hydraulic control system includes revolution valve group 20 and a winch valve group 30.
Revolution valve group 20 includes turning round liquid for driving the rotary fluid motor 21 of crane rotation, the first control valve 22
First hydraulic fluid port of pressure motor 21 is connected to the A mouth of the first control valve 22, and the B mouth and the first hydraulic fluid port of system 11 of the first control valve 22 connect
Logical, the second hydraulic fluid port of rotary fluid motor 21 is connected to the C mouth of the first control valve 22, the D mouth of the first control valve 22 and system the
The connection of two hydraulic fluid ports 12, the first control valve 22 are used to selectively communicate with the first oil of the first hydraulic fluid port and system of rotary fluid motor 21
Mouthfuls 11 and the second hydraulic fluid port and the second hydraulic fluid port of system 12 of rotary fluid motor 21 are disconnected, or disconnects the of rotary fluid motor 21
One hydraulic fluid port and the first hydraulic fluid port of system 11 and the second hydraulic fluid port and the second hydraulic fluid port of system 12 for being connected to rotary fluid motor 21, or connection
First hydraulic fluid port of rotary fluid motor 21 is with the first hydraulic fluid port of system 11 and is connected to the second hydraulic fluid port and system of rotary fluid motor 21
Second hydraulic fluid port 12, one in the first hydraulic fluid port of system 11 and the second hydraulic fluid port of system 12 for revolution 20 input hydraulic pressure of valve group oil,
Another hydraulic oil for being used to turn round in valve group 20 discharge.
Winch valve group 30 includes winch hydraulic motor 31, the second control valve 32 and reset control valve 33, winch hydraulic motor
31 for driving the main hoisting mechanism, auxiliary hoisting mechanism or jib lubbing mechanism of crane, the first hydraulic fluid port of winch hydraulic motor 31
It being connected to system third hydraulic fluid port 13, the second hydraulic fluid port of winch hydraulic motor 31 is connected to the first hydraulic fluid port of the second control valve 32, the
Second hydraulic fluid port of two control valves 32 is connected to the 4th hydraulic fluid port 14 of system, the second control valve 32 for selectively in first state and
Switch between second state, when the second control valve 32 is in first state, the second hydraulic fluid port and system of winch hydraulic motor 31
4th hydraulic fluid port, 14 forward conduction and reversed cut-off, when the second control valve 32 is in the second state, the of winch hydraulic motor 31
Two hydraulic fluid ports and 14 bidirectionally conductive of the 4th hydraulic fluid port of system, one in the 4th hydraulic fluid port 14 of system third hydraulic fluid port 13 and system for strand
Vehicle valve group 30 input hydraulic pressure oil, another is used to for the hydraulic oil in winch valve group 30 being discharged, and the second of winch hydraulic motor 31
Hydraulic fluid port is connected to the first hydraulic fluid port for resetting control valve 33, resets the second hydraulic fluid port and the first of rotary fluid motor 21 of control valve 33
Hydraulic fluid port connection resets control valve 33 for being connected to or disconnecting winch hydraulic motor 31 and rotary fluid motor 21.
In other embodiments, the second hydraulic fluid port for resetting control valve 33 can also be with the second hydraulic fluid port of rotary fluid motor 21
Connection, when so as to change reset, the direction of rotation of rotary table.
Further, it is also possible to which two or more winch valve groups 30 are arranged, different winch valve groups 30 is respectively used to control
One of main hoisting mechanism, auxiliary hoisting mechanism and jib lubbing mechanism processed.
By the way that the first hydraulic fluid port of winch hydraulic motor is connected to system third hydraulic fluid port, the second hydraulic fluid port of winch hydraulic motor
It is connected to the first hydraulic fluid port of the second control valve, the second hydraulic fluid port of the second control valve is connected to the 4th hydraulic fluid port of system, and the second control
Switch between the first state and a second state to the valve property of can choose, allows to change hydraulic horse by the second control valve
The direction that the second hydraulic fluid port reached is connected with the 4th hydraulic fluid port of system, when the second control valve is in first state, system third hydraulic fluid port row
Hydraulic oil out, the 4th hydraulic fluid port input hydraulic pressure oil of system, may be implemented the rotating forward of winch hydraulic motor, when the second control valve is in the
Two-state, system third hydraulic fluid port input hydraulic pressure oil, the 4th hydraulic fluid port of system are discharged hydraulic oil, the anti-of winch hydraulic motor may be implemented
Turn, so as to control main hoisting mechanism, auxiliary hoisting mechanism or jib lubbing mechanism work by winch hydraulic motor, by dynamic
When power is interrupted, the second control valve is made to be in first state, at this time the second hydraulic fluid port of winch hydraulic motor and system the 4th hydraulic fluid port
Can forward conduction, and reversely end, can prevent at this time hydraulic oil flow back oil-feed tank via the 4th hydraulic fluid port of system, by by winch
Second hydraulic fluid port of hydraulic motor is connected to the first hydraulic fluid port for resetting control valve, is resetted the second hydraulic fluid port of control valve and is turned round hydraulic horse
The first hydraulic fluid port reached or the connection of the second hydraulic fluid port, winch hydraulic motor are used to drive the main hoisting mechanism of crane, secondary lifting machine
Structure or jib lubbing mechanism, so that the hydraulic oil in the pipeline of winch valve group is in the pressure effect (pressure or hang that hoisting heavy generates
The pressure that the self weight of arm generates) under, it is pressed into rotary fluid motor, to drive rotary fluid motor to rotate, to drive turntable
It is resetted, while rotary fluid motor also rotates together, is gradually reduced weight or boom under the effect of gravity, completed multiple
Position, since the gravitional force being utilized in lifting mechanism or jib lubbing mechanism completes the reset of turntable, and while turntable resets,
Lifting mechanism or jib lubbing mechanism are also resetted, and do not need to consume other energy, therefore do not need setting emergency motor, drop
The cost of low design and operation.
Fig. 2 is the structural schematic diagram of the hydraulic control system of another crane provided in an embodiment of the present invention, such as Fig. 2 institute
Show, the difference of the hydraulic control system and hydraulic control system shown in FIG. 1 is, includes three strands in the hydraulic control system
Vehicle valve group 30, the winch hydraulic motor 31 in three winch valve groups 30 are respectively used to the main hoisting mechanism of driving crane, secondary rise
Rise mechanism and jib lubbing mechanism.It include main hoisting mechanism, auxiliary hoisting mechanism and luffing machine in maritime affairs crane common at present
Structure, main hoisting mechanism are used for lifting cargo, and auxiliary hoisting mechanism is used to lift by crane living material or the personnel of smallclothes, and jib lubbing mechanism is used for
Control boom pitching, by be arranged three winch valve groups 30 make when being resetted, main hoisting mechanism, auxiliary hoisting mechanism and
Gravitional force in jib lubbing mechanism can be provided to swing mechanism, to drive turntable to reset.
When realization, as shown in Figure 1, the first control valve 22 can be three-position four-way valve, when the right position conducting of the first control valve 22
When, the A mouth of the first control valve 22 with B mouthful disconnection, C mouthfuls are connected to D mouthfuls so that the first hydraulic fluid port of rotary fluid motor 21 and
The first hydraulic fluid port of system 11 is connected to, and the second hydraulic fluid port and the second hydraulic fluid port of system 12 of rotary fluid motor 21 disconnect；When the first control valve
When 22 left positions are connected, the A mouth of the first control valve 22 is connected to B mouthfuls, and C mouthfuls disconnect with D mouthfuls, so that rotary fluid motor 21
First hydraulic fluid port and the first hydraulic fluid port of system 11 disconnect, and the second hydraulic fluid port of rotary fluid motor 21 is connected to the second hydraulic fluid port of system 12；When
When position is connected in first control valve 22, the A mouth of the first control valve 22 is connected to B mouthfuls, and C mouthfuls are connected to D mouthfuls, so that revolution liquid
First hydraulic fluid port of pressure motor 21 is connected to the first hydraulic fluid port of system 11, the second hydraulic fluid port and the second hydraulic fluid port of system of rotary fluid motor 21
12 connections.
Second control valve 32 can be two position two-way valve, be equipped with a check valve and a throttle valve in the second control valve 32, when
When second control valve, 32 left position is connected, the second control valve 32 is in first state, and the check valve conducting in the second control valve 32 twists
Second hydraulic fluid port of vehicle hydraulic motor 31 and 14 forward conduction of the 4th hydraulic fluid port of system and reversed cut-off, so that hydraulic oil can only be from being
The 4th hydraulic fluid port 14 of uniting is flowed to the second hydraulic fluid port of winch hydraulic motor 31, and can not reverse flow；When the right position of the second control valve 32
When conducting, the second control valve 32 is in the second state, the conducting of throttle valve in the second control valve 32, and the of winch hydraulic motor 31
Two hydraulic fluid ports and 14 bidirectionally conductive of the 4th hydraulic fluid port of system, so that hydraulic oil can be from the second hydraulic fluid port of winch hydraulic motor 31 to being
The 4th hydraulic fluid port 14 of uniting flowing.When controlling hoisting heavy rising or the boom elevation angle increases, the conducting of 32 left position of the second control valve；?
When controlling hoisting heavy decline or the reduction of the boom elevation angle, the right position conducting of the second control valve 32；When crane resets, the second control
32 left position of valve conducting processed, hydraulic oil flow into rotary fluid motor 21 by resetting control valve 33.
Resetting control valve 33 can be two position two-way valve, when crane works normally, resets control valve 33 and disconnects, so that
The second hydraulic fluid port and rotary fluid motor 21 for obtaining winch hydraulic motor 31 disconnect, and when being resetted, reset control valve 33 and are connected,
So that the second hydraulic fluid port of winch hydraulic motor 31 is connected to rotary fluid motor 21.
As shown in Fig. 2, hydraulic control system further includes third control valve 41 and shut-off valve 42, the second of control valve 33 is resetted
Hydraulic fluid port is connected to the oil inlet of third control valve 41, the oil outlet of third control valve 41 and the first hydraulic fluid port of rotary fluid motor 21
Connection, third control valve 41 are used to being connected to or disconnecting the second hydraulic fluid port and rotary fluid motor 21 for resetting control valve 33, reset control
Second hydraulic fluid port of valve 33 processed is also connected to the oil inlet of shut-off valve 42, and the oil outlet of shut-off valve 42 is connected to fuel tank.It is being answered
When position, due to not can guarantee turntable when completing to reset, boom or weight also complete reset, therefore pass through setting third control
Valve 41 and shut-off valve 42 processed, turntable complete reset after, by third control valve 41 by reset control valve 33 the second hydraulic fluid port and
Rotary fluid motor 21 disconnects, and continues to rotate to prevent rotation stop platform, while opening stop valve 42, so that hydraulic in winch valve group 30
Oil is discharged into fuel tank from shut-off valve 42 under pressure.
In other embodiments, the oil outlet of third control valve 41 can also connect with the second hydraulic fluid port of rotary fluid motor 21
It is logical, so that the steering of turntable is opposite.
Specifically, third control valve 41 can be two position two-way valve, and when controlling turntable reset, third control valve 41 is led
Logical, after turntable is completed to reset, third control valve 41 is disconnected.
Preferably, hydraulic control system further includes accumulator 43, and accumulator 43 is connected to the oil outlet of shut-off valve 42.To
The remaining gravitional force of weight and boom can be stored by accumulator 43 after turntable is completed to reset, to need
When wanting, rotated using the energy driving turntable in accumulator 43.
Further, hydraulic control system can also include energy storage pressure table 431, energy storage pressure table 431 and accumulation of energy
Device 43 is connected to, to detect the pressure in accumulator 43.
As shown in Fig. 2, hydraulic control system further includes the first safety valve 44, the oil inlet and shut-off valve of the first safety valve 44
42 oil outlet connection, the oil outlet of the first safety valve 44 are connected to fuel tank, the pilot port and shut-off valve 42 of the first safety valve 44
Oil outlet connection.The maximum pressure in accumulator 43 can be limited by the first safety valve 44, the pressure in accumulator 43
When excessive, a part of hydraulic oil can be discharged in fuel tank.
Further, accumulator 43 can also be connected to the oil inlet of normally closed cut-off valve 42, normally closed cut-off valve 42 it is fuel-displaced
Mouth is connected to fuel tank, can be opened normally closed cut-off valve 42, when 43 pressure of accumulator is excessive with quick discharge unit liquid separation in this way
Pressure oil.
Preferably, hydraulic control system further includes hand pump 47, and the oil inlet of hand pump 47 is connected to fuel tank, hand pump 47
Oil outlet with reset control valve 33 the second hydraulic fluid port be connected to.When being resetted, it is possible to which weight and boom have all resetted
It finishes, and turntable is still resetted without completion, then can be pumped into hydraulic oil to rotary fluid motor 21 by hand pump 47 at this time,
To complete the reset of turntable.
Further, the oil outlet of hand pump 47 can be connected to the oil inlet of check valve 49, the oil outlet of check valve 49
It is connected to rotary fluid motor 21, so as to avoid hydraulic oil from flowing back into hand pump 47.
In addition, the oil outlet of check valve 49 can also be connected to oil pressure gauge 48, with the oil pressure in signal piping.
Preferably, hydraulic control system further includes pressure charging valve 50, the oil inlet of pressure charging valve 50 and resets the of control valve 33
The connection of two hydraulic fluid ports, the oil outlet of pressure charging valve 50 are connected to the first hydraulic fluid port of rotary fluid motor 21 or the second hydraulic fluid port.By setting
The pressure of the hydraulic oil entered in rotary fluid motor 21 can be increased when being resetted by setting pressure charging valve 50, in favor of turntable
It resets.
Further, hydraulic control system further includes the second safety valve 51, the oil inlet and pressure charging valve of the second safety valve 51
50 oil inlet connection, the oil outlet of the second safety valve 51 are connected to fuel tank, the pilot port and pressure charging valve 50 of the second safety valve 51
Oil inlet connection.The oil pressure in fluid pressure line can be limited by the way that the second safety valve 51 is arranged, can be incited somebody to action when oil pressure is excessive
Section hydraulic oil is discharged into fuel tank.
Further, hydraulic control system further includes throttle valve 52, the oil inlet of throttle valve 52 and the second safety valve 51
Oil inlet connection, the oil outlet of throttle valve 52 is connected to fuel tank.When being resetted, the hydraulic oil in pressure charging valve 50 is entered
Pressure there is fluctuation, by the way that throttle valve 52 is arranged, the size of the throttle orifice of throttle valve 52 is adjusted, by section hydraulic oil from throttling
Fuel tank is discharged into hole, when oil pressure is higher in hydraulic control system, the flow for the hydraulic oil being discharged from throttle orifice is big, hydraulic control
When oil pressure is lower in system, the flow for the hydraulic oil being discharged from throttle orifice is small, so as to reduce hydraulic oil pressure wave
It is dynamic, keep the pressure of hydraulic oil more stable, while hydraulic oil can also be made quickly to exclude hydraulic by the size of increase throttle orifice
Pipeline.
As shown in Fig. 2, revolution valve group 20 may include two rotary fluid motors 21, the of two rotary fluid motors 21
One hydraulic fluid port is connected, and the second hydraulic fluid port of two rotary fluid motors 21 is connected, and in the crane of part, turntable passes through two simultaneously
A rotary fluid motor 21 is driven, and the rotation of turntable can be made more steady.
Fig. 3 is the structural schematic diagram of the hydraulic control system of another crane provided in an embodiment of the present invention, such as Fig. 3 institute
To show, the hydraulic control system and hydraulic control system shown in Fig. 2 are essentially identical, the difference is that, hydraulic control shown in Fig. 3
It further include the 4th control valve 53 in system processed, the oil outlet of third control valve 41 is connected to the oil inlet of the 4th control valve 53, the
First oil outlet 53a of four control valves 53 is connected to the first hydraulic fluid port of rotary fluid motor 21, and the second of the 4th control valve 53 goes out
Hydraulic fluid port 53b is connected to the second hydraulic fluid port of rotary fluid motor 21, and the 4th control valve 53 is for selectively communicating with third control valve
The oil outlet and rotary fluid motor 21 of 41 oil outlet and the first hydraulic fluid port of rotary fluid motor 21 or third control valve 41
The second hydraulic fluid port, the direction of turntable rotation can be selected, so that turntable is most when controlling turntable and resetting by the 4th control valve 53
Lesser angle can be able to rotate to complete to reset.
Fig. 4 is the enlarged diagram of the 4th control valve in Fig. 3, as shown in figure 4, the 4th control valve 53 can be two-position three way
Valve, when the conducting of the right position of the 4th control valve 53, the oil inlet of the 4th control valve 53 is connected with the first oil outlet 53a, to be connected to the
The oil outlet of three control valves 41 and the first hydraulic fluid port of rotary fluid motor 21；When the conducting of 53 left position of the 4th control valve, the 4th control
The oil inlet of valve 53 processed is connected with the second oil outlet 53b, to be connected to the oil outlet and rotary fluid motor 21 of third control valve 41
The second hydraulic fluid port, pass through switching the 4th control valve 53 state, it can change rotary fluid motor 21 steering, to change
The steering of turntable.
Fig. 5 is the structural schematic diagram of the hydraulic control system of another crane provided in an embodiment of the present invention, shown in Fig. 5
The difference of hydraulic control system and hydraulic control system shown in Fig. 3 be, be provided in Fig. 5 the 5th control valve 54 without
Third control valve 41 is set and the 4th control valve 53, Fig. 6 are the enlarged diagrams of the 5th control valve in Fig. 5, as shown in fig. 6,
The oil inlet 54a of 5th control valve 54 is connected to the second hydraulic fluid port for resetting control valve 33, the first oil outlet of the 5th control valve 54
54b is connected to the first hydraulic fluid port of rotary fluid motor 21, the second oil outlet 54c and rotary fluid motor 21 of the 5th control valve 54
The connection of the second hydraulic fluid port, the 5th control valve 54 is used to selectively communicate with the second hydraulic fluid port for resetting control valve 33 and turns round hydraulic horse
Up to 21 the first hydraulic fluid port, perhaps resets the second hydraulic fluid port of control valve 33 and the second hydraulic fluid port of rotary fluid motor 21 or will answer
The second hydraulic fluid port and rotary fluid motor 21 of level control valve 33 disconnect.5th control valve 54 has had both the control of the third in Fig. 3
The effect of valve 41 and the 4th control valve 53, it is possible to reduce the setting of valve.
When realization, the 5th control valve 54 can be three-position three-way valve, when the right position of the 5th control valve 54 is connected, the 5th control valve
54 oil inlet 54a is connected to the first oil outlet 54b, so as to reset the second hydraulic fluid port and rotary fluid motor 21 of control valve 33
The connection of first hydraulic fluid port；When 5th control valve, 54 left position is connected, the oil inlet of the 5th control valve 54 is connected to the second oil outlet 54c,
So that the second hydraulic fluid port for resetting control valve 33 is connected to the second hydraulic fluid port of rotary fluid motor 21；In 5th control valve 54 when position,
The oil inlet 54a of 5th control valve 54 ends with the first oil outlet 54b and the second oil outlet 54c, will reset control valve 33
The second hydraulic fluid port and rotary fluid motor 21 disconnect.
Referring to fig. 2, hydraulic control system can also have multiple including brake control valve group 16, brake control valve group 16, point
The brake gear 15 that rotary fluid motor 21 and multiple winch hydraulic motors 31 Yong Yu not controlled, is stopped with being braked or being stopped
Vehicle, different brake gears 15, start to carry out pressure when brake and completely brake may also can be different, such as in the present embodiment
In, when starting to be braked, the pressure when pressure of the oil cylinder in brake gear is 1.8MPa, completely brake then reaches
2.3MPa。
A kind of reseting procedure of crane is sketched referring to Fig. 1 and Fig. 3:
The reset of turntable includes rotating forward to reset and invert to reset.
Turntable, which rotates forward, to be resetted: when the power interruption of winch valve group 30, the second control valve 32 is in first state, so that hydraulic
Oil can not be flowed out from the 4th hydraulic fluid port 14 of system, while reset the conducting of control valve 33, and third control valve 41 is connected, the 4th control valve 53
Oil inlet be connected with the first oil outlet 53a of the 4th control valve 53,22 left position of the first control valve conducting, winch hydraulic motor 31
It is rotated under the gravity of hoisting heavy or the gravity of boom, hydraulic oil enters winch hydraulic motor from system third hydraulic fluid port 13
31, and pass sequentially through reset control valve 33, pressure charging valve 50, third control valve 41, the 4th control valve 53 and enter the hydraulic horse of revolution
Revolution valve group 20 is flowed out up to 21 the first hydraulic fluid port, and by the second hydraulic fluid port of system 12, so that rotary fluid motor 21 rotates forward, turntable is just
Turn to reset.If hoisting heavy or boom have resetted completion in reseting procedure, turntable, at this time can be with still without completing to reset
It disconnects and resets control valve 33, hydraulic oil is pressed into rotary fluid motor 21 using the pressure in accumulator 43 by opening stop valve 42
The first hydraulic fluid port, continue to rotate rotary fluid motor 21, complete the reset of turntable.If without storage energy in accumulator 43,
Or the energy of storage is not enough to complete the reset of turntable, can disconnect reset control valve 33 at this time, closes shut-off valve 42, passes through
Hand pump 47 completes the reset of turntable to the first hydraulic fluid port input hydraulic pressure oil of rotary fluid motor 21.If turning in reseting procedure
Platform has been completed to reset, and hoisting heavy or boom are not yet completed to reset, and can close third control valve 41 at this time, opens shut-off valve
42, extra energy is absorbed by accumulator 43, completes the reset of hoisting heavy or boom, after the completion of reset, shutdown cut-off
Valve 42.
Turntable reversion resets: the process that turntable reversion resets and the process that turntable rotating forward resets are essentially identical, difference
It is, when carrying out turntable reversion reset, the oil inlet of the 4th control valve 53 is led with the second oil outlet 53b of the 4th control valve 53
It is logical, the right position conducting of the first control valve 22, when so that hydraulic oil entering revolution valve group 20, by the second oil of rotary fluid motor 21
Mouth flows into, and is flowed out by the first hydraulic fluid port of system 11.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic control system of crane, which is characterized in that the hydraulic control system include revolution valve group (20) and
At least one winch valve group (30),
The revolution valve group (20) include for driving the rotary fluid motor of crane rotation (21), the first control valve (22),
First hydraulic fluid port of the rotary fluid motor (21) is connected to the A mouth of first control valve (22), first control valve
(22) B mouth is connected to the first hydraulic fluid port of system (11), the second hydraulic fluid port of the rotary fluid motor (21) and first control
The C mouth of valve (22) is connected to, and the D mouth of first control valve (22) is connected to the second hydraulic fluid port of system (12), first control valve
(22) for selectively communicating with the first hydraulic fluid port of the rotary fluid motor (21) and first hydraulic fluid port of system (11) and breaking
Open the rotary fluid motor (21) the second hydraulic fluid port and second hydraulic fluid port of system (12), or disconnect the hydraulic horse of the revolution
Up to (21) the first hydraulic fluid port and first hydraulic fluid port of system (11) and be connected to the second hydraulic fluid port of the rotary fluid motor (21) with
Second hydraulic fluid port of system (12), or the first hydraulic fluid port and first hydraulic fluid port of system of the connection rotary fluid motor (21)
(11) and be connected to the rotary fluid motor (21) the second hydraulic fluid port and second hydraulic fluid port of system (12), the first oil of the system
One in mouth (11) and the second hydraulic fluid port of the system (12) is used for revolution valve group (20) the input hydraulic pressure oil, the system
Another in first hydraulic fluid port (11) and the second hydraulic fluid port of the system (12) is used for the hydraulic oil in revolution valve group (20)
Discharge,
The winch valve group (30) includes winch hydraulic motor (31), the second control valve (32) and resets control valve (33), described
Winch hydraulic motor (31) is used to drive the main hoisting mechanism, auxiliary hoisting mechanism or jib lubbing mechanism of the crane, the strand
First hydraulic fluid port of vehicle hydraulic motor (31) is connected to system third hydraulic fluid port (13), the second hydraulic fluid port of the winch hydraulic motor (31)
It is connected to the first hydraulic fluid port of second control valve (32), the second hydraulic fluid port and the 4th hydraulic fluid port of system of second control valve (32)
(14) it is connected to, second control valve (32) for selectively switching between the first state and a second state, when described the
When two control valves (32) are in the first state, the 4th oil of the second hydraulic fluid port of the winch hydraulic motor (31) and the system
Mouth (14) forward conduction and reversed cut-off, when second control valve (32) is in second state, the winch is hydraulic
Second hydraulic fluid port of motor (31) and system the 4th hydraulic fluid port (14) bidirectionally conductive, the system third hydraulic fluid port (13) and the system
One to unite in the 4th hydraulic fluid port (14) for winch valve group (30) the input hydraulic pressure oil, the system third hydraulic fluid port (13) and
Another in the 4th hydraulic fluid port (14) of system is used to for the hydraulic oil in the winch valve group (30) being discharged, the winch liquid
Second hydraulic fluid port of pressure motor (31) be connected to first hydraulic fluid port for resetting control valve (33), and the of reset control valve (33)
Two hydraulic fluid ports are connected to the first hydraulic fluid port of the rotary fluid motor (21) or the second hydraulic fluid port, and the reset control valve (33) is used for
It is connected to or disconnects the winch hydraulic motor (31) and the rotary fluid motor (21).
2. hydraulic control system according to claim 1, which is characterized in that the hydraulic control system includes described in three
Winch valve group (30), the winch hydraulic motor (31) in three winch valve groups (30) are respectively used to drive the crane
Main hoisting mechanism, auxiliary hoisting mechanism and jib lubbing mechanism.
3. hydraulic control system according to claim 1, which is characterized in that the hydraulic control system further includes third control
Valve (41) processed and shut-off valve (42), the oil inlet of second hydraulic fluid port for resetting control valve (33) and the third control valve (41)
Connection, the oil outlet of the third control valve (41) and first hydraulic fluid port of the rotary fluid motor (21) or the second hydraulic fluid port connect
Logical, the third control valve (41) is used to be connected to or disconnect second hydraulic fluid port for resetting control valve (33) and the revolution is hydraulic
Motor (21), second hydraulic fluid port for resetting control valve (33) are also connected to the oil inlet of the shut-off valve (42), the cut-off
The oil outlet of valve (42) is connected to fuel tank.
4. hydraulic control system according to claim 3, which is characterized in that the hydraulic control system further includes accumulator
(43), the accumulator (43) is connected to the oil outlet of the shut-off valve (42).
5. hydraulic control system according to claim 4, which is characterized in that the hydraulic control system further includes the first peace
The oil inlet of full valve (44), first safety valve (44) is connected to the oil outlet of the shut-off valve (42), first safety
The oil outlet of valve (44) is connected to the fuel tank, and the pilot port of first safety valve (44) is fuel-displaced with the shut-off valve (42)
Mouth connection.
6. hydraulic control system according to claim 1, which is characterized in that the hydraulic control system further includes hand pump
(47), the oil inlet of the hand pump (47) is connected to fuel tank, the oil outlet and the reset control valve of the hand pump (47)
(33) the second hydraulic fluid port connection.
7. described in any item hydraulic control systems according to claim 1~6, which is characterized in that the hydraulic control system is also
Including pressure charging valve (50), the oil inlet of the pressure charging valve (50) is connected to second hydraulic fluid port for resetting control valve (33), described
The oil outlet of pressure charging valve (50) is connected to the first hydraulic fluid port of the rotary fluid motor (21) or the second hydraulic fluid port.
8. hydraulic control system according to claim 7, which is characterized in that the hydraulic control system further includes the second peace
The oil inlet of full valve (51), second safety valve (51) is connected to the oil inlet of the pressure charging valve (50), second safety
The oil outlet of valve (51) is connected to fuel tank, and the pilot port of second safety valve (51) and the oil inlet of the pressure charging valve (50) connect
It is logical.
9. hydraulic control system according to claim 8, which is characterized in that the hydraulic control system further includes throttle valve
(52), the oil inlet of the throttle valve (52) is connected to the oil inlet of second safety valve (51), the throttle valve (52)
Oil outlet is connected to the fuel tank.
10. hydraulic control system according to claim 3, which is characterized in that the hydraulic control system further includes the 4th
The oil outlet of control valve (53), the third control valve (41) is connected to the oil inlet of the 4th control valve (53), and described
First oil outlet of four control valves (53) is connected to the first hydraulic fluid port of the rotary fluid motor (21), the 4th control valve
(53) the second oil outlet is connected to the second hydraulic fluid port of the rotary fluid motor (21), and the 4th control valve (53) is for selecting
Selecting property it is connected to the oil outlet of the third control valve (41) and first hydraulic fluid port or described of the rotary fluid motor (21)
The oil outlet of third control valve (41) and second hydraulic fluid port of the rotary fluid motor (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710193528.9A CN107117534B (en) | 2017-03-28 | 2017-03-28 | A kind of hydraulic control system of crane |
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| CN201710193528.9A CN107117534B (en) | 2017-03-28 | 2017-03-28 | A kind of hydraulic control system of crane |
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| CN107117534B true CN107117534B (en) | 2018-12-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108083127B (en) * | 2017-12-19 | 2019-10-22 | 中联重科股份有限公司 | Hydraulic system for releasing heavy object and rescue device |
| CN109292631B (en) * | 2018-10-31 | 2020-03-27 | 中船华南船舶机械有限公司 | Crane control system and control method |
| CN111891214A (en) * | 2020-07-14 | 2020-11-06 | 东风华神汽车有限公司 | Control system and method for rotary pump of cargo vehicle |
| CN112408200B (en) * | 2020-10-10 | 2022-11-22 | 武汉船用机械有限责任公司 | Lifting system of crane |
| CN113335450B (en) * | 2021-06-07 | 2022-10-18 | 中国长江电力股份有限公司 | Engineering ship integrated hydraulic system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5616086B2 (en) * | 2010-03-12 | 2014-10-29 | 古河ユニック株式会社 | Generator drive control device for crane mounted on vehicle |
| CN102336372A (en) * | 2010-07-16 | 2012-02-01 | 徐州重型机械有限公司 | Hydraulic control system of crane and winch device of crane |
| CN103291674B (en) * | 2013-05-31 | 2015-10-21 | 武汉船用机械有限责任公司 | A kind of hydraulic lifting control system |
| CN203754275U (en) * | 2014-01-02 | 2014-08-06 | 武汉船用机械有限责任公司 | Emergency release device for crane |
| CN203998744U (en) * | 2014-05-26 | 2014-12-10 | 武汉船用机械有限责任公司 | The emergency release of hoisting crane |
| CN104358722B (en) * | 2014-11-10 | 2017-06-20 | 武汉船用机械有限责任公司 | A kind of ocean engineering crane hydraulic control system |
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