CN105110192A - Confluence control device of hydraulic crane - Google Patents
Confluence control device of hydraulic crane Download PDFInfo
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- CN105110192A CN105110192A CN201510466090.8A CN201510466090A CN105110192A CN 105110192 A CN105110192 A CN 105110192A CN 201510466090 A CN201510466090 A CN 201510466090A CN 105110192 A CN105110192 A CN 105110192A
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- interflow
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Abstract
The invention discloses a confluence control device of a hydraulic crane. The pilot-operated hydraulic control mode and the proportional electromagnetic valve pilot control mode are adopted for controlling confluence and flow on the two sides. Connection of a confluence device is decided by the one, with higher pressure, of a hydraulic control pilot oil channel and an electric proportion control pilot oil channel, and the combined work flow of the left side and the right side is decided by the continuous change condition of the deflection angle of a pilot handle or the pressure condition on the two sides of a system. Left-to-right confluence or right-to-left confluence is selected according to the pressure flow requirement of systems on the two sides of combined confluence. Confluence impact generated when the crane acts is reduced by controlling moving of a confluence valve core. According to the invention, impact generated in the confluence process of a main hydraulic valve of the crane is reduced, the confluence process can be controlled, the micro-motion property in the process of winching small flow by the crane is guaranteed, and the confluence process can be smooth; by adopting the electronic control confluence mode, the feasibility performance of confluence is improved, and the requirements of hydraulic actuating mechanisms of engineering machinery for hydraulic system confluence on different work conditions can be met.
Description
Technical field
The present invention relates to a kind of control setup of hydraulic lift, specifically a kind of hydraulic lift interflow control setup, belongs to hydraulic lift control setup technical field.
Background technology
Interflow control setup is as the important component part of hydraulic lift and critical control units, mainly consider during design because have: fine motion during impact condition, low discharge one action when the size of through-current capability, the loss of pressure, interflow are opened or closed and the time delay situation of action, and have that through-current capability is large, loss of pressure is little, interflow has less impact when opening or close, do not collaborate during low discharge one action to ensure fine motion, action is best without the interflow control setup of the characteristics such as time delay.
At present, in car hosit, main actions has master winch, secondary elevator, flexible, luffing and revolution, wherein, front four actions are generally integrated on main valve (i.e. multiway valve), main valve, as the core component of crane hydraulic control system, which determines master winch, secondary elevator, the flexible and efficiency of luffing four human action and the energy consumption level of complete machine.The mode relatively unification of existing hoisting crane master winch and secondary elevator, be Dual-pump flow-converging, when namely performing an action, give elevator fuel feeding by the first oil pump and the second oil pump simultaneously, to improve the work efficiency of power element, flexible and luffing then mainly concentrates in two kinds of modes.And for the design of hydraulic lift interflow control setup, the general hydraulically-controlled type automatic merging mode that adopts both at home and abroad, and impact owing to designing interflow when the reason such as lack of standardization can cause hoisting crane action.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of hydraulic lift interflow control setup, the impact that hoisting crane hydraulic main valve merging process produces can be reduced, merging process can be controlled, realize the fine motion of hoisting crane when elevator low discharge, reduce and impact, ensure that merging process is steady.
To achieve these goals, a kind of hydraulic lift interflow control setup that the present invention adopts, this hydraulic lift interflow control setup adopts guide's fluid control and proportion magnetic valve pilot control two kinds of modes to control break-make and the size at interflow, both sides, the break-make of converging device depends on pressure the higher person in hydraulic control guide oil circuit and electric proportional control guide oil circuit, and the size of left and right sides work associating flow depends on the consecutive variations of the deflection angle of pilot handle or the pressure condition of system both sides; According to interflow connection two side system, pressure flow demand, selects from left to right or interflow of turning left from the right side, interflow impact when reducing hoisting crane action by the displacement controlling converging valve core and the control of converging valve uninterrupted.
A kind of hydraulic lift interflow control setup comprises two position three way hydraulic controlled valve, two-position three-way proportional reducing valve, shuttle valve and converging valve, and described converging valve is the two-way converging valves in both sides; The oil inlet at shuttle valve two ends is connected with the oil outlet of two position three way hydraulic controlled valve, the oil outlet of two-position three-way proportional reducing valve respectively, and the oil outlet of shuttle valve is connected with converging valve; Two-position three-way proportional reducing valve provides pilot pressure by automatically controlled pilot pressure oil sources; Converging valve left and right sides oil circuit is connected with actuating unit.Preferably, described converging valve is sliding valve structure.
Electric proportional control guide oil circuit pressure depends on the control electric signal picked up by signal pickup assembly, signal pickup assembly is by gathering the consecutive variations signal of the deflection angle of pilot handle, control the continuous control of electric proportional control guide oil circuit pressure, the size of step-less adjustment guiding electric controlling pressure; Automatically controlled pilot pressure gathers pilot handle angle signal by sensor, by integrated amplifier, exports pilot control electric current, realizes the continuous control of control presssure.Preferably, described signal pickup assembly is sensor.
Compared with prior art, the converging valve in the present invention has two-way interflow function, by adopting hydraulic control and automatically controlled two kinds of modes to control the mode of collaborating, can according to interflow connection two side system, and pressure flow demand, selects from left to right or interflow of turning left from the right side.By the displacement of accurate continuous control, converging valve core, when realizing reducing hoisting crane action, interflow is impacted.By adopting automatically controlled mode, adopt solenoid-operated proportional reducing valve, introduce integrating control unit, effectively can control merging process, realize hoisting crane when elevator low discharge, fretting performance is good, is increased to a certain degree (depends on pilot handle angular deflection signal) until flow, and reduction impacts and merging process is steady.In addition, by adopting and the mode at automatically controlled interflow, enhancing the operating performance at interflow, meeting the requirement that engineering machinery hydraulic actuating unit under different operating mode collaborates hydraulic efficiency pressure system.
Accompanying drawing explanation
Fig. 1 is actuating unit hydraulic principle schematic diagram of the present invention;
Fig. 2 is control flow chart of the present invention;
Fig. 3 is the diagram of circuit of solenoid control of the present invention.
In figure: 1, two position three way hydraulic controlled valve, 2, two-position three-way proportional reducing valve, 3, shuttle valve, 4, converging valve, 5, automatically controlled pilot pressure oil sources, oil circuit on the left of A, converging valve, oil circuit on the right side of B, converging valve, C, guide's hydraulic control oil circuit, D, converging valve working connection, E, pilot pressure oil circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1 to Figure 3, a kind of hydraulic lift interflow control setup, this hydraulic lift interflow control setup adopts guide's fluid control and proportion magnetic valve pilot control two kinds of modes, the break-make at interflow, accurate control both sides and size, the break-make of converging device depends on pressure the higher person in hydraulic control guide oil circuit and electric proportional control guide oil circuit, and the size of left and right sides work associating flow depends on the consecutive variations of the deflection angle of pilot handle or the pressure condition of system both sides; According to interflow connection two side system, pressure flow demand, selects from left to right or interflow of turning left from the right side, interflow impact when reducing hoisting crane action by the displacement controlling converging valve core and the control of converging valve uninterrupted.
Above-mentioned hydraulic lift interflow control setup can comprise two position three way hydraulic controlled valve 1, two-position three-way proportional reducing valve 2, shuttle valve 3 and converging valve 4, and described converging valve 4 is the two-way converging valves in both sides; The oil inlet at shuttle valve 3 two ends is connected with the oil outlet of two position three way hydraulic controlled valve 1, the oil outlet of two-position three-way proportional reducing valve 2 respectively, and the oil outlet of shuttle valve 3 is connected with converging valve 4; Two-position three-way proportional reducing valve 2 provides pilot pressure by automatically controlled pilot pressure oil sources 5; Converging valve 4 left and right sides oil circuit is connected with actuating unit.Wherein, the break-make of converging device can be depending on elevated pressures that shuttle valve 3 selects (the high person in hydraulic control guide oil circuit and electric proportional control guide oil circuit), and the pilot pressure of hydraulic control guide oil circuit depends on the pressure of system both sides.
Electric proportional control guide oil circuit pressure depends on the control electric signal picked up by signal pickup assembly, signal pickup assembly is by gathering the consecutive variations signal of the deflection angle of pilot handle, control the continuous control of electric proportional control guide oil circuit pressure, the size of step-less adjustment guiding electric controlling pressure; Automatically controlled pilot pressure gathers pilot handle angle signal by sensor, by integrated amplifier, exports pilot control electric current, realizes the continuous control of control presssure.Wherein, integrated amplifier to the process of collection signal (when deflection angle reaches setting value, export ratio controls electric current), proportional pressure-reducing valve under leader current controls, export ratio guide hydraulic pressure signal, and then control converging valve core displacement.
Preferably, described signal pickup assembly can be sensor.Automatically controlled signal gathers the declination signal of pilot control handle by sensor, exports one stage signal electric current; One stage signal electric current exports the proportional current signal controlling two-position three-way proportional reducing valve again through integrated amplifier, the export ratio pressure signal of proportional current signal control two-position three-way proportional reducing valve, realize the step-less adjustment of converging valve core, accurate control converging valve uninterrupted; Meanwhile, ratio change pressure signal, realizes reducing the impact collaborating to cause, improves system stability.
Described converging valve 4 is sliding valve structure, determines both sides flow area, control the size of both sides flow by the displacement of spool.
From said structure, the converging valve in the present invention has two-way interflow function, by adopting hydraulic control and automatically controlled two kinds of modes to control the mode of collaborating, can according to interflow connection two side system, and pressure flow demand, selects from left to right or interflow of turning left from the right side.By the displacement of accurate continuous control, converging valve core, when realizing reducing hoisting crane action, interflow is impacted.By adopting automatically controlled mode, adopt solenoid-operated proportional reducing valve, introduce integrating control unit, effectively can control merging process, realize hoisting crane when elevator low discharge, fretting performance is good, is increased to a certain degree (depends on pilot handle angular deflection signal) until flow, and reduction impacts and merging process is steady.In addition, by adopting and the mode at automatically controlled interflow, enhancing the operating performance at interflow, meeting the requirement that engineering machinery hydraulic actuating unit under different operating mode collaborates hydraulic efficiency pressure system.
Claims (5)
1. a hydraulic lift interflow control setup, it is characterized in that, hydraulic lift interflow control setup adopts guide's fluid control and proportion magnetic valve pilot control two kinds of modes to control break-make and the size at interflow, both sides, the break-make of converging device depends on pressure the higher person in hydraulic control guide oil circuit and electric proportional control guide oil circuit, and the size of left and right sides work associating flow depends on the consecutive variations of the deflection angle of pilot handle or the pressure condition of system both sides; According to interflow connection two side system, pressure flow demand, selects from left to right or interflow of turning left from the right side, interflow impact when reducing hoisting crane action by the displacement controlling converging valve core and the control of converging valve uninterrupted.
2. a kind of hydraulic lift interflow according to claim 1 control setup, it is characterized in that, comprise two position three way hydraulic controlled valve (1), two-position three-way proportional reducing valve (2), shuttle valve (3) and converging valve (4), described converging valve (4) is the two-way converging valve in both sides; The oil inlet at shuttle valve (3) two ends is connected with the oil outlet of two position three way hydraulic controlled valve (1), the oil outlet of two-position three-way proportional reducing valve (2) respectively, and the oil outlet of shuttle valve (3) is connected with converging valve (4); Two-position three-way proportional reducing valve (2) provides pilot pressure by automatically controlled pilot pressure oil sources (5); Converging valve (4) left and right sides oil circuit is connected with actuating unit.
3. a kind of hydraulic lift interflow according to claim 1 control setup, it is characterized in that, described converging valve (4) is sliding valve structure.
4. a kind of hydraulic lift interflow according to claim 1 control setup, it is characterized in that, electric proportional control guide oil circuit pressure depends on the control electric signal picked up by signal pickup assembly, signal pickup assembly is by gathering the consecutive variations signal of the deflection angle of pilot handle, control the continuous control of electric proportional control guide oil circuit pressure, the size of step-less adjustment guiding electric controlling pressure; Automatically controlled pilot pressure gathers pilot handle angle signal by sensor, by integrated amplifier, exports pilot control electric current, realizes the continuous control of control presssure.
5. a kind of hydraulic lift interflow according to claim 4 control setup, it is characterized in that, described signal pickup assembly is sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510466090.8A CN105110192B (en) | 2015-07-31 | 2015-07-31 | A kind of hydraulic crane collaborates control device |
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| CN201510466090.8A CN105110192B (en) | 2015-07-31 | 2015-07-31 | A kind of hydraulic crane collaborates control device |
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| CN105110192A true CN105110192A (en) | 2015-12-02 |
| CN105110192B CN105110192B (en) | 2018-03-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465088A (en) * | 2015-12-22 | 2016-04-06 | 徐州徐工液压件有限公司 | Automatic multi-way-valve non-confluent adaptation device |
| CN107859665A (en) * | 2017-11-24 | 2018-03-30 | 张宏伟 | A kind of fluid control pressure valve group |
| CN113090599A (en) * | 2021-03-31 | 2021-07-09 | 徐工集团工程机械股份有限公司科技分公司 | Logic control valve and hydraulic system |
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| JPH09217702A (en) * | 1996-02-15 | 1997-08-19 | Yutani Heavy Ind Ltd | Control device of hydraulic shovel |
| CN101718286A (en) * | 2009-12-07 | 2010-06-02 | 江苏柳工机械有限公司 | Flow collecting valve |
| CN102312451A (en) * | 2010-06-30 | 2012-01-11 | 北汽福田汽车股份有限公司 | Excavator converging control system and excavator thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465088A (en) * | 2015-12-22 | 2016-04-06 | 徐州徐工液压件有限公司 | Automatic multi-way-valve non-confluent adaptation device |
| CN107859665A (en) * | 2017-11-24 | 2018-03-30 | 张宏伟 | A kind of fluid control pressure valve group |
| CN113090599A (en) * | 2021-03-31 | 2021-07-09 | 徐工集团工程机械股份有限公司科技分公司 | Logic control valve and hydraulic system |
| CN113090599B (en) * | 2021-03-31 | 2022-07-05 | 徐工集团工程机械股份有限公司科技分公司 | Logic control valve and hydraulic system |
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| CN105110192B (en) | 2018-03-20 |
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