CN104828717B - Hydraulic control system and wheeled crane - Google Patents
Hydraulic control system and wheeled crane Download PDFInfo
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- CN104828717B CN104828717B CN201410273630.6A CN201410273630A CN104828717B CN 104828717 B CN104828717 B CN 104828717B CN 201410273630 A CN201410273630 A CN 201410273630A CN 104828717 B CN104828717 B CN 104828717B
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- hydraulic
- pressure
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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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a hydraulic control system and a wheeled crane, wherein the hydraulic control system includes: a telescopic cylinder having a rodless chamber and a rod chamber; a hydraulic operated directional valve comprising an oil inlet, an oil discharge outlet, a first work oil port, a second work oil port, a first control end and a second control end, wherein the oil inlet is used for feeding a first work oil, the first work oil port is communicated with the rodless chamber and the second work oil port is communicated with the rod chamber; an electric proportional control module comprising a main module inlet, a first module outlet, a second module outlet and an oil pressure control apparatus, wherein the main module inlet is used for feeding a second work oil, the first module outlet is communicated with the first control end, the second module outlet is communicated with the second control end, and the oil pressure control apparatus performs electric proportional control to the oil pressure of the second work oil from the main module inlet and then sends the second work oil to the first module outlet or the second module outlet. The hydraulic control system can achieve the electric proportional control to the telescopic cylinder on the basis of the hydraulic operated directional valve.
Description
Technical field
The present invention relates to engineering truck field, more particularly, to a kind of hydraulic control system and wheeled crane.
Background technology
Single-cylinder bolt type telescopic boom technology is typical mechanical-electrical-hydraulic integration system, represents our times telescopic arm technology
Top level, be the developing direction of wheeled crane telescopic arm technology.In wheeled crane product development process, sometimes need
Will be using single-cylinder bolt type telescopic boom technology on the basis of the hydraulic control system that hydraulic control telescopic arm stretches.
Fig. 1 is the schematic diagram of the hydraulic control system that hydraulic control telescopic arm stretches in prior art.
As shown in figure 1, when operation handle 1 controls telescopic arm to stretch out, the a1 ' mouth of the flow control valve 3 of hydraulic control enters and controls
Oil, makes the valve element of flow control valve 3 move downward, and the rodless cavity of telescopic oil cylinder 2 enters and controls oil, the piston rod of telescopic oil cylinder 2
Stretch out.When operation handle 1 controls telescopic arm to retract, the b1 ' mouth of flow control valve 3 enters and controls oil, makes the valve of flow control valve 3
Core moves upwards, and the rod chamber of telescopic oil cylinder 2 enters and controls oil, and the piston rod of telescopic oil cylinder 2 is retracted.The angle of regulation handle 1
The valve port opening of flow control valve 3 being adjusted, thus adjusting the flow of flow control valve 3, and then adjusting stretching of telescopic oil cylinder
Contracting speed, thus control the stretching speed of telescopic arm.
During realizing the present invention, inventor finds, for the hydraulic control system stretched in above hydraulic control telescopic arm
Using single-cylinder bolt type telescopic boom technology on the basis of system, if simply the flow control valve of the hydraulic control of telescopic oil cylinder will be controlled
It is replaced by electric proportional control valve, electric proportional control is carried out with the stretching speed to telescopic arm, the hydraulic pressure often stretching to telescopic arm
Control system brings new fault.
Content of the invention
Present invention aim at providing a kind of hydraulic control system, this control system can be in the flow-control using hydraulic control
Valve controls telescopic oil cylinder to realize the electric proportional control that telescopic oil cylinder is stretched on the basis of stretching, thus not because changing electric ratio
Reversal valve brings new fault to hydraulic control system.
First aspect present invention provide a kind of hydraulic control system, comprising: telescopic oil cylinder, telescopic oil cylinder have rodless cavity and
Rod chamber；Pilot operated directional control valve, pilot operated directional control valve includes oil-in, oil drain out, the first actuator port and the second actuator port, and
Including the first control end and the second control end for controlling spool position, the oil-in of pilot operated directional control valve is used for input the first work
Make oil, the first actuator port is connected with rodless cavity, and the second actuator port is connected with rod chamber；Electric proportional control module, electric ratio
Control module includes primary module import, the first module outlet, the second module outlet and hydraulic pressure control device, and primary module import is used for
Input the second working oil, the first module outlet is connected with the first control end, and the second module outlet is connected with the second control end, oil pressure
Control device carries out sending into the first module outlet after electric proportional control to the oil pressure of the second working oil carrying out autonomous module import, with
And carry out sending into the second module outlet after electric proportional control to the oil pressure of the second working oil carrying out autonomous module import.
Further, hydraulic pressure control device includes electric proportional pressure-reducing valve.
Further, hydraulic control system also includes handle, handle include oil-in, oil drain out, first hydraulic control outlet and
Second hydraulic control outlet, the oil-in of handle is used for input the second working oil, and the first hydraulic control outlet is with the first control end selectively
Connection or disconnection, the second hydraulic control outlet is selectively connected with the second control end or disconnects.
Further, electric proportional control module also includes oil circuit switching control, and oil circuit switching control controls the
The on off operating mode of the on off operating mode of one hydraulic control outlet and the first control end, the second hydraulic control outlet and the second control end, and control
The on off operating mode of the on off operating mode of primary module import and the first control end, primary module import and the second control end.
Further, hydraulic control system also includes oil circuit switching control, and oil circuit switching control controls main mould
Whether block import inputs the second working oil, and whether the oil-in of joystick inputs the second working oil.
Further, electric proportional control module also includes the first module inlet and the second module inlet, the first hydraulic control outlet
Connect with the first module inlet, the second hydraulic control outlet is connected with the second module inlet, from the second work of the first module inlet
Oil sends into the first module outlet by hydraulic pressure control device, and the second working oil from the second module inlet is filled by oil pressure cntrol
Put feeding the second module outlet.
Further, hydraulic pressure control device includes: the first electric proportional pressure-reducing valve, and the first electric proportional pressure-reducing valve includes oil-feed
Mouth, oil-out and oil drain out, primary module import is selectively connected with the oil-in of the first electric proportional pressure-reducing valve or disconnects, first
The oil-out of electric proportional pressure-reducing valve is connected with the first module outlet；Second electric proportional pressure-reducing valve, the second electric proportional pressure-reducing valve includes
Oil-in, oil-out and oil drain out, primary module import is selectively connected with the oil-in of the second electric proportional pressure-reducing valve or disconnects,
The oil-out of the second electric proportional pressure-reducing valve is connected with the second module outlet.
Further, the first module inlet is selectively connected with the oil-in of the first electric proportional pressure-reducing valve or disconnects；The
Two module inlet are selectively connected with the oil-in of the second electric proportional pressure-reducing valve or disconnect.
Further, electric proportional control module also includes oil circuit switching control, and oil circuit switching control controls master
The on off operating mode of oil-in of module inlet and the first electric proportional pressure-reducing valve, the first module inlet and the first electric proportional pressure-reducing valve
The on off operating mode of oil-in, and control the on off operating mode of oil-in of primary module import and the second electric proportional pressure-reducing valve, second
The on off operating mode of the oil-in of module inlet and the second electric proportional pressure-reducing valve.
Further, oil circuit switching control includes: the first electric control reversing valve, and the first electric control reversing valve includes first and enters
Hydraulic fluid port, the second oil-in and oil-out, the first oil-in of the first electric control reversing valve and primary module inlet communication, first automatically controlled changes
Connect to the second oil-in of valve with the first module inlet, the oil-out of the first electric control reversing valve and the first electric proportional pressure-reducing valve
Oil-in connects；Second electric control reversing valve, the second electric control reversing valve includes the first oil-in, the second oil-in and oil-out, the
First oil-in of two electric control reversing valves and primary module inlet communication, the second oil-in of the second electric control reversing valve and the second module
Inlet communication, the oil-out of the second electric control reversing valve is connected with the oil-in of the second electric proportional pressure-reducing valve.
Further, hydraulic control system also includes sensing device and controller, and whether sensing device detection handle passes through
Second working oil, controller couples with further respectively with sensing device, hydraulic pressure control device and oil circuit switching control,
Sensing device includes: first pressure sensor, and first pressure sensor is used for whether detection the first hydraulic control outlet passes through the second work
Make oil, second pressure sensor is coupled with controller；Second pressure sensor, second pressure sensor is used for detection the second hydraulic control
Whether outlet passes through the second working oil, and second pressure sensor is coupled with controller.
Second aspect present invention provides a kind of wheeled crane, the hydraulic control stretched including telescopic arm and control telescopic arm
System, wherein, hydraulic control system is the hydraulic control system any one of first aspect present invention.
Hydraulic control system according to the present invention and wheeled crane, due to the hydraulic pressure control device of electric proportional control module
Can carry out sending into the first module outlet, Yi Jike after electric proportional control to the oil pressure of the second working oil carrying out autonomous module import
Carry out sending into the second module outlet after electric proportional control with the oil pressure to the second working oil carrying out autonomous module import, therefore, though
The main flow control valve so controlling telescopic oil cylinder is pilot operated directional control valve, but, still can be by electric proportional control module
Hydraulic pressure control device carry out electric proportional control to realize the control of the first control end to pilot operated directional control valve and the second control end
The electric proportional control of the oil pressure of oil, makes pilot operated directional control valve be provided with the attribute of electrical control, therefore, it can using liquid controlled reversing
Valve controls telescopic oil cylinder to realize the electric proportional control that telescopic oil cylinder is stretched on the basis of stretching, thus not because changing electric ratio
Control valve and bring new fault to hydraulic control system.Further, in telescopic arm and the control telescopic arm of wheeled crane
The present invention is applied, it is possible to achieve on the basis of the hydraulic control system that hydraulic control telescopic arm stretches in flexible hydraulic control system
Using single-cylinder bolt type telescopic boom technology.
Brief description
The accompanying drawing constituting the part of the application is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the telescopic hydraulic control system of hydraulic control telescopic arm in prior art；
Fig. 2 is the schematic diagram of the hydraulic control system of the preferred embodiment of the present invention；
Fig. 3 be the preferred embodiment of the present invention hydraulic control system control telescopic arm stretch when control flow chart.
Specific embodiment
To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the application and the feature in embodiment can be mutually combined.
It should be noted that term used herein above is merely to describe specific embodiment, and it is not intended to restricted root
Illustrative embodiments according to the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singulative
Be also intended to including plural form, additionally, it should be understood that, when in this manual using belong to "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, assembly and/or combinations thereof.
Just as described in the background art, for the base of the hydraulic control telescopic arm telescopic hydraulic control system in prior art
Using single-cylinder bolt type telescopic boom technology on plinth, if simply the flow control valve controlling the hydraulic control of telescopic oil cylinder is replaced by
Electric proportional control valve, the hydraulic control system often stretched to telescopic arm brings the technical problem of new fault.In order to solve this
Technical problem, the preferred embodiment of the present invention provides a kind of hydraulic control system.
Fig. 2 is the schematic diagram of the hydraulic control system of the preferred embodiment of the present invention.
As shown in Fig. 2 this hydraulic control system mainly includes telescopic oil cylinder 70, pilot operated directional control valve 60 and electric proportional control mould
Block 10.Telescopic oil cylinder 70 has rodless cavity and rod chamber.Pilot operated directional control valve 60 includes oil-in, oil drain out, the first actuator port
With the second actuator port, and include the first control end and the second control end for controlling spool position.Pilot operated directional control valve
Oil-in is used for input the first working oil.First actuator port is connected with rodless cavity, and the second actuator port is connected with rod chamber.Electricity
Ratio control module 10 includes primary module import p, the first module outlet a1, the second module outlet b1 and hydraulic pressure control device.Main
Module inlet p is used for input the second working oil.First module outlet a1 is connected with the first control end.Second module outlet b1 and
Two control end connections.Hydraulic pressure control device is carried out after electric proportional control to the oil pressure of the second working oil carrying out autonomous module import p
Send into the first module outlet a1, and the oil pressure of the second working oil carrying out autonomous module import p is carried out sending after electric proportional control
Enter the second module outlet b1.
Hydraulic pressure control device due to electric proportional control module 10 can be to the second working oil carrying out autonomous module import p
Oil pressure sends into the first module outlet a1 after carrying out electric proportional control, and can be to the second working oil carrying out autonomous module import p
Oil pressure carry out electric proportional control after send into the second module outlet b1, therefore although controlling the main flow of telescopic oil cylinder 70 to control
Valve is pilot operated directional control valve 60, but, still can be by the hydraulic pressure control device in electric proportional control module 10 be carried out with electricity ratio
Example controls the electric proportional control of the oil pressure controlling oil to realize the first control end to pilot operated directional control valve 60 and the second control end,
Make pilot operated directional control valve 60 be provided with the attribute of electrical control, therefore, it can controlling telescopic oil cylinder 70 using pilot operated directional control valve 60
The electric proportional control that telescopic oil cylinder 70 is stretched is realized, thus not giving liquid because changing electric proportional control valve on the basis of flexible
Pressure control system brings new fault.Further, the hydraulic pressure control stretched in telescopic arm and the control telescopic arm of wheeled crane
The present invention is applied, it is possible to achieve using single cylinder bolt-type on the basis of hydraulic control telescopic arm telescopic hydraulic control system in system processed
Telescopic arm technology.
Although the original intention of the present invention be in order to hydraulic control telescopic arm stretch hydraulic control system on the basis of using single cylinder
Bolt-type telescopic arm technology, but the application of the present invention is not limited on the telescopic arm of wheeled crane, and apply to one
Cutter has device and the equipment carrying out extension and contraction control by telescopic oil cylinder.
Hereinafter comparison Fig. 2 and Fig. 3 further illustrates to the preferred embodiment of the present invention.
As shown in Fig. 2 the first working oil is derived from the first pumping installations 30.The oil drain out of pilot operated directional control valve 60 is with fuel tank 40 even
Logical.Pilot operated directional control valve 60 is specially three-position four-way valve.In order to control the oil pressure of the first working oil with related to hydraulic control system
Part and device are protected, and are also provided with the first overflow valve 80 between the first pump installation 30 and fuel tank 40.
Preferably, the hydraulic pressure control device of electric proportional control module 10 includes electric proportional pressure-reducing valve.Wrap in the present embodiment
Include two electric proportional pressure-reducing valves, the respectively first electric proportional pressure-reducing valve 13 and the second electric proportional pressure-reducing valve 14.
As shown in Fig. 2 the hydraulic control system of the present embodiment also includes handle 50, handle 50 include oil-in, oil drain out,
First hydraulic control outlet and the second hydraulic control outlet, the oil-in of handle 50 is used for input the second working oil, the first hydraulic control outlet with front
State the first control end selectively to connect or disconnect, the second hydraulic control outlet selectively connects on-off with aforementioned second control end
Open.
Second working oil is derived from the second pumping installations 20.The oil drain out of handle 50 is connected with fuel tank 40.In order to control second
The oil pressure of working oil to protect to hydraulic control system associated components and device, between the second pump installation 20 and fuel tank 40
It is also provided with the second overflow valve 70.
In the present embodiment, due to, in addition to setting electric proportional control module 10, also setting up handle 50, the first of handle 50
Hydraulic control outlet selectively connects with the first control end or disconnects, the second hydraulic control export selectively connect with the second control end or
Disconnect.Therefore, it can select by handle 50, the telescopic direction of telescopic oil cylinder 50 and speed to be carried out according to execute-in-place demand
Non-follow control, or select by electric proportional control module 10, the telescopic direction of telescopic oil cylinder 50 and speed to be controlled automatically
System.
In order to realize the switching of Non-follow control and electrical control it is preferable that electric proportional control module 10 also includes oil circuit cuts
Change control device, oil circuit switching control controls the first hydraulic control outlet to go out with the on off operating mode of the first control end, the second hydraulic control
Mouthful with the on off operating mode of the second control end, and the on off operating mode of control primary module import p and the first control end, primary module import
P and the on off operating mode of the second control end.In the present embodiment, oil circuit switching control includes the first electric control reversing valve 11 and
Two electric control reversing valves 12.
Alternatively, in order to realize the switching of Non-follow control and electrical control, oil circuit switching control can be not included in
Inside electric proportional control module 10, and it is provided in the upstream of electric proportional control module 10, at this point it is possible to allow oil circuit switching control
Device controls whether primary module import p inputs the second working oil, and whether the oil-in of joystick 50 inputs the second work
Oil.For example, in a unshowned embodiment, oil circuit switching control can include a reversal valve, this reversal valve
Oil-in is used for being passed through the second working oil, and an actuator port of this reversal valve is connected and another work with primary module import p
Hydraulic fluid port is connected with the oil-in of handle 50.
In the present embodiment, electric proportional control module 10 also includes the first module inlet a and the second module inlet b.Handle 50
First hydraulic control outlet connect with the first module inlet a.Second hydraulic control outlet of handle 50 is connected with the second module inlet b.Excellent
Selection of land, the second working oil from the first module inlet a sends into the first module outlet a1 by hydraulic pressure control device；From second
Second working oil of module inlet b sends into the second module outlet b1 by hydraulic pressure control device.It is easy to being derived from using which
Second working oil of handle 50 synchronizes switching with the second working oil carrying out autonomous module import p.
Above it is stated that, in the present embodiment, hydraulic pressure control device includes the first electric proportional pressure-reducing valve 13 and the second electric ratio
Air relief valve 14.First electric proportional pressure-reducing valve 13 includes oil-in, oil-out and oil drain out.The electric ratio of primary module import p and first
The oil-in of air relief valve 13 selectively connects or disconnects, the oil-out of the first electric proportional pressure-reducing valve 13 and the first module outlet a1
Connection.Second electric proportional pressure-reducing valve 14 includes oil-in, oil-out and oil drain out.Primary module import p and second electric ratio decompression
The oil-in of valve 14 selectively connects or disconnects, and the oil-out of the second electric proportional pressure-reducing valve 14 and the second module outlet b1 are even
Logical.
Electric proportional control module 10 also includes module oil drain out, and module oil drain out is connected with fuel tank.First electric ratio decompression
The oil-out of the oil drain out of valve 13 and the second electric proportional pressure-reducing valve 14 is all connected with the module oil drain out of electric proportional control module 10.
In order to the second working oil from the first module inlet a is sent into the first module outlet by hydraulic pressure control device
A1, and realize for the second working oil from the second module inlet b sending into the second module outlet b1 by hydraulic pressure control device,
Additionally preferably, the first module inlet a is selectively connected with the oil-in of the first electric proportional pressure-reducing valve 13 or disconnects；Second mould
Block import b is selectively connected with the oil-in of the second electric proportional pressure-reducing valve 14 or disconnects.
The oil circuit switching control of electric proportional control module 10 is preferably controlled primary module import p and is subtracted with the first electric ratio
The on off operating mode of the oil-in of the electric proportional pressure-reducing valve 13 of the on off operating mode of the oil-in of pressure valve 13, the first module inlet a and first,
And control the on off operating mode of oil-in of the electric proportional pressure-reducing valve 14 of primary module import p and second, the second module inlet b and second
The on off operating mode of the oil-in of electric proportional pressure-reducing valve 14.
As shown in Fig. 2 as it was previously stated, in the present embodiment oil circuit switching control include the first electric control reversing valve 11 and
Two electric control reversing valves 12.First electric control reversing valve 11 includes the first oil-in, the second oil-in and oil-out, the first electric control reversing
First oil-in of valve 11 is connected with primary module import p, the second oil-in of the first electric control reversing valve 11 and the first module inlet a
Connection, the oil-out of the first electric control reversing valve 11 is connected with the oil-in of the first electric proportional pressure-reducing valve 13.Second electric control reversing valve
12 include the first oil-in, the second oil-in and oil-out.First oil-in of the second electric control reversing valve 12 and primary module import p
Connection, the second oil-in of the second electric control reversing valve 12 is connected with the second module inlet b, the oil-out of the second electric control reversing valve 12
Connect with the oil-in of the second electric proportional pressure-reducing valve 14.
In the present embodiment, the first electric control reversing valve 11 and the second electric control reversing valve 12 are two-position four-way valve.
First electric control reversing valve 11 is set and the second electric control reversing valve 12 can be by the electricity to the first electric control reversing valve 11
Gas control realization to from handle 50 first hydraulic control outlet the second working oil and primary module import p the second working oil same
Step conversion, i.e. the first hydraulic control outlet when connecting with the first control end, primary module import p and the disconnection of the first control end, conversely, i.e. the
When one hydraulic control outlet is disconnected with the first control end, primary module import p is connected with the first control end；Likewise it is possible to by
The electrical control of two electric control reversing valves 12 realizes the second working oil of the second hydraulic control outlet from handle 50 and primary module are entered
The synchronization conversion of second working oil of mouth p, when that is, the second hydraulic control outlet is connected with the second control end, primary module import p and second
Control end disconnects, conversely, when i.e. the second hydraulic control outlet is disconnected with the second control end, primary module import p is connected with the second control end.
In addition, hydraulic control system also includes sensing device and controller, whether sensing device detection handle 50 is by the
Two working oils.Controller is coupled with sensing device, hydraulic pressure control device and oil circuit switching control respectively, with according to sensing dress
The testing result put controls hydraulic pressure control device and oil circuit switching control.Setting sensing device and controller be more beneficial for right
The automatically controlling of hydraulic control system.
Sensing device includes first pressure sensor (not shown) and second pressure sensor (not shown).First pressure passes
Sensor is used for whether detection the first hydraulic control outlet passes through the second working oil, and first pressure sensor is coupled with controller.Second pressure
Force transducer is used for whether detection the second hydraulic control outlet passes through the second working oil, and second pressure sensor is coupled with controller.
As shown in Fig. 2 electric proportional control module 10 includes first pressure sensor port a ' and second pressure sensor side
Mouth b '.First pressure sensor port a ' and the first hydraulic control outlet, second pressure sensor port b ' and the handss of handle 50
Second hydraulic control outlet of handle 50.And first pressure sensor is connected with first pressure sensor port a ', second pressure passes
Sensor is connected with second pressure sensor port b '.
The present invention also provides a kind of wheeled crane, the liquid that this wheeled crane includes telescopic arm and controls telescopic arm to stretch
Pressure control system, wherein hydraulic control system are aforesaid hydraulic control system.
To say below taking the telescopic arm that the hydraulic control system of the preferred embodiment of the present invention to control wheeled crane as a example
The operation principle of the hydraulic control system of the bright present invention.
Fig. 3 be the preferred embodiment of the present invention hydraulic control system control telescopic arm stretch when control flow chart.
As shown in figure 3, the preferred embodiment can realize the hydraulic pressure that the telescopic arm of single-cylinder bolt type telescopic boom technology stretches
Two kinds of control mode manual control modes and automatic control mode that control system requires.Individually below to manual controlling party
The control process of formula and automatic control mode illustrates.
1st, when being chosen as manual control mode:
In original state, the oil-out of the first electric proportional pressure-reducing valve 13 is connected with oil drain out, the second electric proportional pressure-reducing valve 14
Oil-out connect with oil drain out, the first control end of pilot operated directional control valve 60 and the second control end equal no pressure oil flow into, hydraulic control
Reversal valve 60 is in middle position, and the piston rod of oil cylinder 70 is motionless.
When operation handle 50 controls telescopic arm to stretch out, the first hydraulic control outlet a passes through the second working oil, with first pressure sensing
The first pressure sensor that device port a ' connects detects signal, and controller receives the signal of first pressure sensor, the first electricity
Control reversal valve 11 dead electricity, the second working oil exporting a from the first hydraulic control reaches the oil-in of the first electric proportional pressure-reducing valve 13, and
And first electric proportional pressure-reducing valve 13 opening standard-sized sheet.Now, the pressure of second working oil of the first module outlet a1 is by handle 50
Aperture control, thus the speed that the valve port opening of Non-follow control pilot operated directional control valve 60 and telescopic oil cylinder 70 and telescopic arm are stretched out
Degree.
When operation handle 50 controls telescopic arm to retract, the second hydraulic control outlet b passes through the second working oil, with second pressure sensing
The second pressure sensor that device port b ' connects detects signal, and controller receives the signal of second pressure sensor, the second electricity
Control reversal valve 12 dead electricity, the second working oil exporting b from the second hydraulic control reaches the oil-in of the second electric proportional pressure-reducing valve 14, and
And second electric proportional pressure-reducing valve 14 opening standard-sized sheet.Now, the pressure of second working oil of the second module outlet b1 is by handle 50
Aperture control, thus the speed that the valve port opening of Non-follow control pilot operated directional control valve 60 and telescopic oil cylinder 70 and telescopic arm are retracted
Degree.
2nd, when being chosen as automatic control mode:
In original state, the oil-out of the first electric proportional pressure-reducing valve 13 is connected with oil drain out, the second electric proportional pressure-reducing valve 14
Oil-out connect with oil drain out, the first control end of pilot operated directional control valve 60 and the second control end equal no pressure oil flow into, hydraulic control
Reversal valve 60 is in middle position, and the piston rod of oil cylinder 70 is motionless.
When operation handle 50 controls telescopic arm to stretch out, the first hydraulic control outlet a passes through the second working oil, with first pressure sensing
The first pressure sensor that device port a ' connects detects signal, and controller receives the signal of first pressure sensor, controls the
One electric control reversing valve 11 must be electric, and the second working oil carrying out autonomous module import p reaches the oil-in of the first electric proportional pressure-reducing valve 13,
Meanwhile, controller is to the first electric proportional pressure-reducing valve 13 output control value.Second work of the oil-out of the first electric proportional pressure-reducing valve 13
The pressure making oil is determined by this controlling value, thus automatically controlling the valve port opening of pilot operated directional control valve 60 and telescopic oil cylinder 70 and stretching
The speed that contracting arm stretches out.
When operation handle 50 controls telescopic arm to stretch out, the second hydraulic control outlet b passes through the second working oil, with second pressure sensing
The second pressure sensor that device port b ' connects detects signal, and controller receives the signal of second pressure sensor, controls the
Two electric control reversing valves 12 must be electric, and the second working oil carrying out autonomous module import p entrance reaches entering of the second electric proportional pressure-reducing valve 14
Hydraulic fluid port, meanwhile, controller is to the second electric proportional pressure-reducing valve 14 output control value.The of the oil-out of the second electric proportional pressure-reducing valve 14
The pressure of two working oils is determined by this controlling value, thus automatically control the valve port opening of pilot operated directional control valve 60 and telescopic oil cylinder 70 with
And the speed that telescopic arm is retracted.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
On the basis of the hydraulic control system of original hydraulic control telescopic arm, it is not required to change the flow control valve of original hydraulic control
Achieve that the electric proportional control that telescopic arm is stretched, meet the requirement of single-cylinder bolt type telescopic boom technology, it is to avoid because by hydraulic control
The electric reversal valve of flow-control valve replacement cause the new system failure, simultaneously save production cost.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (13)
1. a kind of hydraulic control system is it is characterised in that include:
Telescopic oil cylinder (70), described telescopic oil cylinder (70) has rodless cavity and rod chamber；
Pilot operated directional control valve (60), described pilot operated directional control valve (60) includes oil-in, oil drain out, the first actuator port and the second work
Hydraulic fluid port, and include the first control end and the second control end for controlling spool position, the oil-in of described pilot operated directional control valve
For inputting the first working oil, described first actuator port is connected with described rodless cavity, and described second actuator port is had with described
Rod cavity connects；
Electric proportional control module (10), described electric proportional control module (10) includes primary module import (p), the first module outlet
(a1), the second module outlet (b1) and hydraulic pressure control device, described primary module import (p) is used for input the second working oil, described
First module outlet (a1) is connected with described first control end, and described second module outlet (b1) is with described second control end even
Logical, described hydraulic pressure control device carries out electric ratio control to the oil pressure of described second working oil from described primary module import (p)
Described first module outlet (a1), and the oil to described second working oil from described primary module import (p) is sent into after system
Pressure sends into described second module outlet (b1) after carrying out electric proportional control
Described electric proportional control module (10) also includes the oil circuit switching control for switching Non-follow control and electrical control.
2. hydraulic control system according to claim 1 is it is characterised in that described hydraulic pressure control device includes electric ratio subtracts
Pressure valve.
3. hydraulic control system according to claim 1 is it is characterised in that described hydraulic control system also includes handle
(50), described handle (50) includes oil-in, oil drain out, the first hydraulic control outlet and the second hydraulic control outlet, described handle (50)
Oil-in is used for inputting described second working oil, and described first hydraulic control outlet selectively connects on-off with described first control end
Open, described second hydraulic control outlet is selectively connected with described second control end or disconnects.
4. hydraulic control system according to claim 3 is it is characterised in that the control of described oil circuit switching control is described
First hydraulic control outlet exports the break-make with described second control end with the on off operating mode of described first control end, described second hydraulic control
State, and control the on off operating mode of described primary module import (p) and described first control end, described primary module import (p) with
The on off operating mode of described second control end.
5. hydraulic control system according to claim 3 is it is characterised in that described hydraulic control system also includes oil circuit cuts
Change control device, described oil circuit switching control controls whether described primary module import (p) inputs described second working oil, with
And control whether the oil-in of described handle (50) inputs described second working oil.
6. hydraulic control system according to claim 3 is it is characterised in that described electric proportional control module (10) also includes
First module inlet (a) and the second module inlet (b), described first hydraulic control outlet is connected with described first module inlet (a), institute
State the second hydraulic control outlet to connect with described second module inlet (b), the second working oil from described first module inlet (a) leads to
Cross described hydraulic pressure control device and send into described first module outlet (a1), from the second work of described second module inlet (b)
Oil sends into described second module outlet (b1) by described hydraulic pressure control device.
7. hydraulic control system according to claim 6 is it is characterised in that described hydraulic pressure control device includes:
First electric proportional pressure-reducing valve (13), the described first electric proportional pressure-reducing valve (13) includes oil-in, oil-out and oil drain out, institute
State primary module import (p) selectively to connect with the oil-in of the described first electric proportional pressure-reducing valve (13) or disconnect, described first
The oil-out of electric proportional pressure-reducing valve (13) is connected with described first module outlet (a1)；
Second electric proportional pressure-reducing valve (14), the described second electric proportional pressure-reducing valve (14) includes oil-in, oil-out and oil drain out, institute
State primary module import (p) selectively to connect with the oil-in of the described second electric proportional pressure-reducing valve (14) or disconnect, described second
The oil-out of electric proportional pressure-reducing valve (14) is connected with described second module outlet (b1).
8. hydraulic control system according to claim 7 it is characterised in that
Described first module inlet (a) is selectively connected with the oil-in of the described first electric proportional pressure-reducing valve (13) or disconnects；
Described second module inlet (b) is selectively connected with the oil-in of the described second electric proportional pressure-reducing valve (14) or disconnects.
9. hydraulic control system according to claim 8 is it is characterised in that described electric proportional control module (10) also includes
Oil circuit switching control, described oil circuit switching control controls described primary module import (p) to subtract with the described first electric ratio
The on off operating mode of oil-in of pressure valve (13), described first module inlet (a) are entered with described first electric proportional pressure-reducing valve (13)
The on off operating mode of hydraulic fluid port, and control described primary module import (p) and the oil-in of the described second electric proportional pressure-reducing valve (14)
The on off operating mode of the oil-in of on off operating mode, described second module inlet (b) and described second electric proportional pressure-reducing valve (14).
10. hydraulic control system according to claim 9 is it is characterised in that described oil circuit switching control includes:
First electric control reversing valve (11), described first electric control reversing valve (11) includes the first oil-in, the second oil-in and fuel-displaced
Mouthful, the first oil-in of described first electric control reversing valve (11) is connected with described primary module import (p), described first electric control reversing
Second oil-in of valve (11) is connected with described first module inlet (a), the oil-out of described first electric control reversing valve (11) with
The oil-in connection of the described first electric proportional pressure-reducing valve (13)；
Second electric control reversing valve (12), described second electric control reversing valve (12) includes the first oil-in, the second oil-in and fuel-displaced
Mouthful, the first oil-in of described second electric control reversing valve (12) is connected with described primary module import (p), described second electric control reversing
Second oil-in of valve (12) is connected with described second module inlet (b), the oil-out of described second electric control reversing valve (12) with
The oil-in connection of the described second electric proportional pressure-reducing valve (14).
11. hydraulic control systems according to claim 4 or 5 are it is characterised in that described hydraulic control system also includes passing
Induction device and controller, described sensing device detects whether described handle (50) passes through described second working oil, described controller
Couple with described sensing device, described hydraulic pressure control device and described oil circuit switching control respectively with according to described sensing dress
The testing result put controls described hydraulic pressure control device and described oil circuit switching control.
12. hydraulic control systems according to claim 11 are it is characterised in that described sensing device includes:
First pressure sensor, described first pressure sensor is used for detecting whether described first hydraulic control outlet passes through described second
Working oil, described first pressure sensor is coupled with described controller；
Second pressure sensor, described second pressure sensor is used for detecting whether described second hydraulic control outlet passes through described second
Working oil, described second pressure sensor is coupled with described controller.
A kind of 13. wheeled cranes, the hydraulic control system stretched including telescopic arm and the described telescopic arm of control, its feature exists
In described hydraulic control system is the hydraulic control system according to any one of claim 1 to 12.
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| CN201410273630.6A CN104828717B (en) | 2014-06-18 | 2014-06-18 | Hydraulic control system and wheeled crane |
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| CN201410273630.6A CN104828717B (en) | 2014-06-18 | 2014-06-18 | Hydraulic control system and wheeled crane |
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| CN106932666A (en) * | 2015-12-31 | 2017-07-07 | 沪东重机有限公司 | Multiple-way valve control function method of testing |
| CN108425402B (en) * | 2018-03-22 | 2020-10-30 | 亳州市中联物流园管理有限公司 | Novel mechanical control device of skid-steer loader |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7089733B1 (en) * | 2005-02-28 | 2006-08-15 | Husco International, Inc. | Hydraulic control valve system with electronic load sense control |
| CN102336370B (en) * | 2010-07-26 | 2013-02-13 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and control method thereof |
| CN102502433B (en) * | 2011-10-08 | 2013-09-04 | 武汉船用机械有限责任公司 | Variable amplitude hydraulic system of dual-oil-cylinder variable amplitude crane |
| KR101862868B1 (en) * | 2011-10-14 | 2018-07-06 | 에스케이이노베이션 주식회사 | Stepless capacity control system of reciprocating compressor by hydraulic operated variable clearance pocket |
| CN102874687B (en) * | 2012-09-19 | 2015-04-22 | 三一重工股份有限公司 | Crane and hydraulic control system for single cylinder telescopic mechanism thereof |
| CN103386914A (en) * | 2013-08-12 | 2013-11-13 | 三一矿机有限公司 | Lifting stationarity control system and mining dump truck |
| CN203430890U (en) * | 2013-08-22 | 2014-02-12 | 徐州重型机械有限公司 | Control valve device, multi-cylinder synchronous control hydraulic system and crane |
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Effective date of registration: 20200930 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206 Beijing, Shahe, Changping District Town, Sha Yang Road, Beiqi Futian Motor Company Limited law and Intellectual Property Department Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |
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