CN109185241A - Lorry-mounted crane switching valve of getting on or off the bus - Google Patents
Lorry-mounted crane switching valve of getting on or off the bus Download PDFInfo
- Publication number
- CN109185241A CN109185241A CN201811395949.0A CN201811395949A CN109185241A CN 109185241 A CN109185241 A CN 109185241A CN 201811395949 A CN201811395949 A CN 201811395949A CN 109185241 A CN109185241 A CN 109185241A
- Authority
- CN
- China
- Prior art keywords
- valve
- getting
- bus
- mouthfuls
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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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
- F15B13/0401—Valve members; Fluid interconnections therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of lorry-mounted crane switching valves of getting on or off the bus.Including the first overflow valve, electromagnetic switching valve, the second overflow valve, electric proportional flow control valve, pressure compensator and throttle orifice；First overflow valve is arranged between constant displacement pump pressure port pipeline and fuel tank pipeline；The constant displacement pump pressure port pipeline passes through the T mouthfuls of connection solenoid valves by P mouthfuls of connection electromagnetic switching valves, the fuel tank pipeline；The electromagnetic switching valve connects multi-way valve of getting on the bus by B mouthfuls, and the solenoid valve is connected by A mouthfuls into leg control system of getting off.The invention has the advantages that 1, it is easy to operate, woth no need to individual switching valve, by automatically controlled, no maloperation may for switching of getting on or off the bus.2, each oil piping system is equipped with independent overflow protection valve, carries out pressure setting according to respective demand pressure, leg system is effectively avoided to generate impacting with high pressure.3, leg control system uses load-sensitive ratio control mode, and flow distribution according to need, operation fine motion is good, and system throttles are efficient.
Description
Technical field
The present invention relates to a kind of lorry-mounted crane switching valves of getting on or off the bus, and belong to technical field of hydraulic.
Background technique
Lorry-mounted crane hydraulic control system is broadly divided into two parts: get on the bus executing agency's hydraulic control portion and branch of getting off
Leg hydraulic control portion；This two parts is completely independent work during entire hoisting operation, i.e., in whole work process
In, supporting leg operation part is first carried out, entire vehicle is supported, then just can be carried out executing agency's work of getting on the bus；Entire work
In the process, the supporting leg that do not allow to carry out during executing agency is got on the bus in manipulation to get off manipulation.
At present in truck-mounted crane design of Hydraulic System, in manipulation and control of getting on or off the bus, it is mainly the following control mode:
Hydraulic control portion and hydraulic control portion of getting off get on the bus using two independent hydraulic control circuits, hydraulic control of getting on the bus
System and hydraulic control portion of getting off respectively use an independent hydraulic oil source to be controlled, and do not interfere between each other.
Hydraulic control system of getting on the bus and hydraulic control system of getting off share a hydraulic oil source, and centre is manual by one
(or automatically controlled) switching valve carries out switching of getting on or off the bus, and hydraulic control system of getting off individually is equipped with a supporting leg selection control valve.
Hydraulic control system of getting on the bus and hydraulic control system of getting off share a hydraulic oil source, hydraulic control system of getting off list
It is solely equipped with a supporting leg and selects control valve, when supporting leg does not work, hydraulic circuit selects oil circuit among control valve to enter by supporting leg
It gets on the bus hydraulic control system.
Hydraulic control system of getting on the bus and hydraulic control system of getting off share a hydraulic oil source, and centre is manual by one
(or automatically controlled) switching valve carries out switching of getting on or off the bus, and hydraulic control system of getting off individually is equipped with proportional control valve.
The shortcomings that 1st kind of control mode is: HYDRAULIC CONTROL SYSTEM of getting on or off the bus is independent from each other, not the function of hydraulic interlock
Can, it easily causes maloperation and causes the accident；
The shortcomings that 2nd kind of control mode is: HYDRAULIC CONTROL SYSTEM of getting on or off the bus is independent from each other, and need to individually be equipped with supporting leg selection control
Valve processed, supporting leg control are controlled using switch valve, and ratio control performance is poor, higher cost；
The shortcomings that 3rd kind of control mode is: HYDRAULIC CONTROL SYSTEM of getting on or off the bus is independent from each other, and need to individually be equipped with supporting leg selection control
Valve processed, control oil circuit be by descending valve enter get on the bus, due to get on or off the bus work when pressure rating be it is different,
Supporting leg easily causes impacting with high pressure when operating；
The shortcomings that 4th kind of control mode is: HYDRAULIC CONTROL SYSTEM of getting on or off the bus is independent from each other, and need to individually be equipped with supporting leg control
Valve does not have supporting leg selection function, and supporting leg combined operation is inconvenient, at high cost.
Summary of the invention
The present invention is in view of the foregoing drawbacks, and it is an object of the present invention to provide a kind of new control mode, is got on or off the bus by one kind and switch control
Valve processed can be good at realizing upper and lower vehicle hydraulic system interlocking, while have the function of supporting leg control selections again, landing leg stretching ratio
Control characteristic, landing leg stretching Ioad-sensing control function.
Thus the technical solution adopted by the present invention is that: lorry-mounted crane switching valve of getting on or off the bus, including the first overflow valve, electricity
Magnetic switching valve, the second overflow valve, electric proportional flow control valve, pressure compensator and throttle orifice；
First overflow valve is arranged between constant displacement pump pressure port pipeline and fuel tank pipeline；
The constant displacement pump pressure port pipeline passes through the T mouthfuls of connection electromagnetism by P mouthfuls of connection electromagnetic switching valves, the fuel tank pipeline
Valve；
The electromagnetic switching valve connects multi-way valve of getting on the bus by B mouthfuls, and the solenoid valve is connected by A mouthfuls into supporting leg control system of getting off
System.
The lower leg control system includes the second overflow valve for carrying out low pressure limitation to leg system pressure；
The leg control system of getting off further includes having electric proportional flow control valve, pressure compensator and throttle orifice, the throttle orifice
Setting is used for the cavity pressure off-load of pressure compensator spring, and the throttle orifice is connected to fuel tank；
The electromagnetic switching valve divides two-way to be connected to the electric proportional flow control valve and pressure compensator, the electricity ratio by A mouthfuls
Flow signal is connected to solenoid directional control valve of getting off.
The invention has the advantages that 1, it is easy to operate, woth no need to individual switching valve, switching of getting on or off the bus is by automatically controlled, errorless behaviour
It may make.
2, each oil piping system is equipped with independent overflow protection valve, carries out pressure setting according to respective demand pressure, effectively
Leg system is avoided to generate impacting with high pressure.3, leg control system uses load-sensitive ratio control mode, and flow is distributed according to need,
Operation fine motion is good, and system throttles are efficient.4, structure is simple, at low cost, easy to manufacture.
Detailed description of the invention
Fig. 1 is hydraulic schematic diagram of the invention.
1 it is the first overflow valve in figure, 2 be electromagnetic switching valve, 3 be the second overflow valve, 4 be electric proportional flow control valve, 5 is pressure
Force compensating device, 6 are throttle orifice.
Specific embodiment
Lorry-mounted crane switching valve of getting on or off the bus, including the first overflow valve, electromagnetic switching valve, the second overflow valve, electric ratio
Flow valve, pressure compensator and throttle orifice；
First overflow valve is arranged between constant displacement pump pressure port pipeline and fuel tank pipeline；
The constant displacement pump pressure port pipeline passes through the T mouthfuls of connection electromagnetism by P mouthfuls of connection electromagnetic switching valves, the fuel tank pipeline
Valve；
The electromagnetic switching valve connects multi-way valve of getting on the bus by B mouthfuls, and the solenoid valve is connected by A mouthfuls into supporting leg control system of getting off
System.
The lower leg control system includes the second overflow valve for carrying out low pressure limitation to leg system pressure；
The leg control system of getting off further includes having electric proportional flow control valve, pressure compensator and throttle orifice, the throttle orifice
Setting is used for the cavity pressure off-load of pressure compensator spring, and the throttle orifice is connected to fuel tank；
The electromagnetic switching valve divides two-way to be connected to the electric proportional flow control valve and pressure compensator, the electricity ratio by A mouthfuls
Flow signal is connected to solenoid directional control valve of getting off.
Further explanation is made to the present invention below, to be better understood by the present invention: the present invention is formed there are six part, point
It is not the first overflow valve, electromagnetic switching valve, the second overflow valve, electric proportional flow control valve, pressure compensator and throttle orifice.
1 principle of function explanation: in rigid starting, electromagnetic switching valve 2 is in middle position H-type function, and quantitative pump discharge passes through H-type
The direct oil return box of Median Function reduces system energy loss, keeps hydraulic system energy consumption minimum；In constant displacement pump pressure port pipeline and oil
Add the first overflow valve between case pipeline, safeguard protection is done to whole system maximum working pressure, plays overflow protective effect
2 principle of function explanation: when 2 end Y1 of electromagnetic switching valve obtains electric, electromagnetic switching valve 2 works in left position, constant displacement pump pressure oil
Directly by entering hydraulic system of getting on the bus after electromagnetic switching valve B hydraulic fluid port, executing agency's movement of getting on the bus is controlled；Electromagnetic switching valve A oil
Mouth is directly communicated with fuel tank, the direct off-load of the hydraulic system pressure that will get off
3 principle of function explanation: when 2 end Y2 of solenoid valve obtains electric, electromagnetic switching valve 2 works in right position, and constant displacement pump pressure oil passes through
Enter leg control system of getting off after electromagnetic switching valve A hydraulic fluid port；In supporting leg pipeline, it is provided with the second overflow valve, to supporting leg system
Pressure of uniting carries out low pressure limitation；In leg control system, it is provided with pressure compensator and proportional flow control valve, passes through pressure compensation
Device and proportional flow control valve achieve the purpose that control landing leg stretching load-sensitive ratio, do not control letter in electric proportional flow control valve
Number when, for pressure compensator spring cavity pressure by throttle orifice oil return box, pressure oil carries out Low-pressure load discharge by pressure compensator；?
When electric proportional flow control valve provides scaling signal, hydraulic system is under the collective effect of electric proportional flow control valve and pressure compensator, root
According to the flow of scaling signal export ratio, the size and payload size of flow have no relations, and only and scaling signal size has relationship.Valve
Design has fixed orifice on block, for by pressure compensator spring cavity pressure off-load, reaching branch when leg system does not work
The purpose of leg system low-voltage off-load.
Claims (2)
1. lorry-mounted crane switching valve of getting on or off the bus, which is characterized in that including the first overflow valve, electromagnetic switching valve, the second overflow
Valve, electric proportional flow control valve, pressure compensator and throttle orifice；
First overflow valve is arranged between constant displacement pump pressure port pipeline and fuel tank pipeline；
The constant displacement pump pressure port pipeline passes through the T mouthfuls of connection electromagnetism by P mouthfuls of connection electromagnetic switching valves, the fuel tank pipeline
Valve；
The electromagnetic switching valve connects multi-way valve of getting on the bus by B mouthfuls, and the solenoid valve is connected by A mouthfuls into supporting leg control system of getting off
System.
2. lorry-mounted crane switching valve of getting on or off the bus according to claim 1, which is characterized in that the lower supporting leg control system
System includes the second overflow valve for carrying out low pressure limitation to leg system pressure；
The leg control system of getting off further includes having electric proportional flow control valve, pressure compensator and throttle orifice, the throttle orifice
Setting is used for the cavity pressure off-load of pressure compensator spring, and the throttle orifice is connected to fuel tank；
The electromagnetic switching valve divides two-way to be connected to the electric proportional flow control valve and pressure compensator, the electricity ratio by A mouthfuls
Flow signal is connected to solenoid directional control valve of getting off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811395949.0A CN109185241B (en) | 2018-11-22 | 2018-11-22 | Loading and unloading switching valve for lorry-mounted crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811395949.0A CN109185241B (en) | 2018-11-22 | 2018-11-22 | Loading and unloading switching valve for lorry-mounted crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109185241A true CN109185241A (en) | 2019-01-11 |
| CN109185241B CN109185241B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811395949.0A Active CN109185241B (en) | 2018-11-22 | 2018-11-22 | Loading and unloading switching valve for lorry-mounted crane |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101553A (en) * | 2020-01-14 | 2020-05-05 | 徐州徐工矿业机械有限公司 | Electric control rotary brake release system of hydraulic excavator and use method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202923545U (en) * | 2012-11-05 | 2013-05-08 | 徐州重型机械有限公司 | Loading and unloading switching device and load-sensitive hydraulic system |
| CN203770261U (en) * | 2014-03-03 | 2014-08-13 | 徐州重型机械有限公司 | Fire truck and getting-on and getting-off switching system thereof |
| CN104712603A (en) * | 2015-03-18 | 2015-06-17 | 徐州重型机械有限公司 | Hydraulic system of autocrane, autocrane and control method |
-
2018
- 2018-11-22 CN CN201811395949.0A patent/CN109185241B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202923545U (en) * | 2012-11-05 | 2013-05-08 | 徐州重型机械有限公司 | Loading and unloading switching device and load-sensitive hydraulic system |
| CN203770261U (en) * | 2014-03-03 | 2014-08-13 | 徐州重型机械有限公司 | Fire truck and getting-on and getting-off switching system thereof |
| CN104712603A (en) * | 2015-03-18 | 2015-06-17 | 徐州重型机械有限公司 | Hydraulic system of autocrane, autocrane and control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101553A (en) * | 2020-01-14 | 2020-05-05 | 徐州徐工矿业机械有限公司 | Electric control rotary brake release system of hydraulic excavator and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109185241B (en) | 2023-10-13 |
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