CN104805877A - Flow control system for recycling bucket rod of super-tonnage backhoe excavator - Google Patents
Flow control system for recycling bucket rod of super-tonnage backhoe excavator Download PDFInfo
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- CN104805877A CN104805877A CN201510143128.8A CN201510143128A CN104805877A CN 104805877 A CN104805877 A CN 104805877A CN 201510143128 A CN201510143128 A CN 201510143128A CN 104805877 A CN104805877 A CN 104805877A
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- valve
- flow
- regeneration
- bucket rod
- control system
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Abstract
The invention discloses a flow control system for recycling the bucket rod of a super-tonnage backhoe excavator, and belongs to the technical field of a flow control hydraulic system. The flow control system comprises a back pressure value (4), a regenerative check valve (2), an electromagnetic proportional valve set (3), a flow regeneration valve (1) and a pressure sensor (5), wherein the pressure sensor (5) is arranged in a large cavity of a bucket rod cylinder, a port A of the flow regeneration valve (1) is connected to a small cavity of the bucket rod cylinder, a port T of the flow regeneration valve (1) is connected to the back pressure value (4) and a port Pa of the back pressure value (4) is sequentially connected to an electric proportional valve (31) and an electromagnetic reversing valve (32) in the electromagnetic proportional valve set (3) and the regenerative check valve (2) is connected between the port B of the flow regeneration valve (1) and the large cavity of the bucket rod cylinder. The flow control system provided by the invention has the beneficial effects of preventing a suction phenomenon of the bucket rod cylinder caused by the inadequate flow of the large cavity of the bucket rod cylinder in the process of recycling the bucket rod.
Description
Technical field
The present invention relates to the flow control system that a kind of super-tonnage backacter dipper reclaims, belong to flow control hydraulic system technical field.
Background technology
The hydraulic system of super-tonnage excavator is made up of the many valve systems of many pumps, each equipment and oil return action, and all by many oil pump feeds, the method for many valve shuntings realizes.Excavate action when excavator completes one, after lifting, revolution, discharging terminate, the next one be carried out and excavate action.Dipper excavation is the main excavation mode of backacter, and when excavator discharging terminates, dipper will do recovery action.In dig in hydraulic system, all arrange the flow regeneration valve of dipper in valve, in removal process, the pressure due to bucket arm cylinder loculus is greater than the pressure in the large chamber of dipper, from loculus by proprietary regeneration valve toward repairing in large chamber.The main valve of super-tonnage excavator is inner without proprietary flow regeneration valve, in the process that dipper reclaims, probably due to large chamber underfed, causes the emptying phenomenon of bucket arm cylinder.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides the flow control system that a kind of super-tonnage backacter dipper reclaims, realize the regeneration of dipper flow, avoid the emptying phenomenon of bucket arm cylinder.
To achieve these goals, the technical solution used in the present invention is: the flow control system that a kind of super-tonnage backacter dipper reclaims, comprise counterbalance valve, regeneration one way valve, electromagnetic proportional valve group, also comprise flow regeneration valve and pressure sensor, pressure sensor is arranged in the large chamber of bucket arm cylinder, the A mouth of flow regeneration valve is connected to the loculus of bucket arm cylinder, the T mouth of flow regeneration valve is connected to counterbalance valve, the Pa mouth of flow regeneration valve is connected to electric proportional valve in electromagnetic proportional valve group and solenoid operated directional valve successively, regeneration one way valve is connected between the B mouth of flow regeneration valve and the large chamber of bucket arm cylinder.
Described flow regeneration valve, regeneration one way valve and counterbalance valve have two respectively.
Described flow regeneration valve is arranged on the equipment of main valve outside.
The invention has the beneficial effects as follows: by controlling the electric handle travel that dipper is regained, making excavator when dipper reclaims action by means of only single pump single valve fuel feeding, the gravity of dependence dipper, reach energy-conservation effect by the flow regeneration of flow regeneration valve; And by sensor detected pressures size, judge the keying of excavator flow regeneration valve, make excavator can according to the attitude of dipper in good time automatically transfer many oil pump feeds to, recovery or the excavation of dipper are come, avoid in the process reclaimed at dipper, bucket arm cylinder large chamber underfed causes the emptying phenomenon of bucket arm cylinder.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
In figure: 1, flow regeneration valve, 2, regeneration one way valve, 3, electromagnetic proportional valve group, 31, electric proportional valve, 32, solenoid operated directional valve, 4, counterbalance valve, 5, pressure sensor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1: the present invention includes counterbalance valve 4, regeneration one way valve 2, electromagnetic proportional valve group 3, also comprise flow regeneration valve 1 and pressure sensor 5, pressure sensor 5 is arranged in the large chamber of bucket arm cylinder, the A mouth of flow regeneration valve 1 is connected to the loculus of bucket arm cylinder, the T mouth of flow regeneration valve 1 is connected to counterbalance valve 4, the Pa mouth of flow regeneration valve 1 is connected to electric proportional valve 31 in electromagnetic proportional valve group 3 and solenoid operated directional valve 32 successively, and regeneration one way valve 2 is connected between the B mouth of flow regeneration valve 1 and the large chamber of bucket arm cylinder.
Described flow regeneration valve 1, regeneration one way valve 2 and counterbalance valve 4 have two, respectively in order to meet design requirement of the present invention better.
Described flow regeneration valve 1 is arranged on the equipment of main valve outside.
The present invention in use, dipper carries out recovery action by flow regeneration valve 1, the stroke that the speed reclaiming action reclaims first conductive handle by dipper determines, dipper reclaims first conductive handle and controls the flow of main pump and the open area size of flow regeneration valve 1 simultaneously, when dipper reclaim first conductive handle have a recovery action time, if meet the unlocking condition of flow regeneration valve 1, now dipper reclaims by single oil pump feed, if the proportionate relationship of dipper stroke K and main pump flow is Kx1, dipper reclaims first conductive handle by controlling the size of electric proportional valve 31 signal of telecommunication in electromagnetic proportional valve group 3, electric proportional valve 31 controls the Pa mouth size of flow regeneration valve 1, Pa mouth size and dipper reclaim the proportional relation of first conductive handle.Solenoid operated directional valve 32 plays safe effect, when preventing electric proportional valve 31 to lose efficacy, and the misoperation of flow regeneration valve 1; It should be noted that, when single pump single valve fuel feeding, the Functional Characteristics of valve core of main valve is that the loculus of dipper is only by regeneration valve oil return.Due to the effect that dipper self gravitation declines, the pressure of bucket arm cylinder loculus is greater than the pressure in large chamber, when the fluid in large chamber is not enough, the hydraulic oil of dipper loculus is flow to by the A mouth of flow regeneration valve 1, the large chamber of bucket arm cylinder is flowed into by B mouth and regeneration one way valve 2, one way valve 2 is regenerated owing to being connected with between flow regeneration valve 1 and bucket arm cylinder, when the large cavity pressure of bucket arm cylinder is less than little cavity pressure, can by regeneration one way valve 2 from the loculus of bucket arm cylinder toward the large chamber repairing of bucket arm cylinder.When dipper is recovered to vertical attitude or scraper bowl crown contacts with excavation surface, the large cavity pressure of dipper raises, when being increased to setting pressure, pressure sensor 5 triggers, electromagnetic proportional valve group 3 dead electricity, flow regeneration valve 1 quits work, the bucket arm cylinder of excavator transfers many oil pump feeds pattern to, need the high power work of hydraulic system, the uninterrupted of main pump and the proportionate relationship of first conductive handle stroke change, the total flow of each main pump and the travel relationships of handle are Q=Kx1+Kx2+ Kx3+ the present invention detects the pressure in the large chamber of bucket arm cylinder by pressure sensor 5, judge the keying of flow regeneration valve 1, withdrawal or the excacation of the high-power dipper of excavator large discharge are come.The present invention can realize the conservative control of main pump flow in the removal process of dipper, in whole dipper removal process, according to the different attitudes of excavator boom, by the detection of pressure sensor 5, realize the distribution of the many valve systems of many pumps to flow in dipper removal process.
Claims (3)
1. the flow control system of a super-tonnage backacter dipper recovery, comprise counterbalance valve (4), regeneration one way valve (2), electromagnetic proportional valve group (3), characterized by further comprising flow regeneration valve (1) and pressure sensor (5), pressure sensor (5) is arranged in the large chamber of bucket arm cylinder, the A mouth of flow regeneration valve (1) is connected to the loculus of bucket arm cylinder, the T mouth of flow regeneration valve (1) is connected to counterbalance valve (4), the Pa mouth of flow regeneration valve (1) is connected to electric proportional valve (31) in electromagnetic proportional valve group (3) and solenoid operated directional valve (32) successively, regeneration one way valve (2) is connected between the B mouth of flow regeneration valve (1) and the large chamber of bucket arm cylinder.
2. the flow control system of a kind of super-tonnage backacter dipper recovery according to claim 1, it is characterized in that, described flow regeneration valve (1), regeneration one way valve (2) and counterbalance valve (4) have two respectively.
3. the flow control system of a kind of super-tonnage backacter dipper recovery according to claim 1 and 2, it is characterized in that, described flow regeneration valve (1) is arranged on the equipment of main valve outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510143128.8A CN104805877B (en) | 2015-03-30 | 2015-03-30 | A kind of flow control system of super-tonnage backacter dipper recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510143128.8A CN104805877B (en) | 2015-03-30 | 2015-03-30 | A kind of flow control system of super-tonnage backacter dipper recovery |
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| CN104805877A true CN104805877A (en) | 2015-07-29 |
| CN104805877B CN104805877B (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510143128.8A Active CN104805877B (en) | 2015-03-30 | 2015-03-30 | A kind of flow control system of super-tonnage backacter dipper recovery |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113482089B (en) * | 2021-07-13 | 2022-11-25 | 徐工集团工程机械股份有限公司 | Flow regeneration valve group, hydraulic system and excavator |
Citations (9)
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| JPH08177085A (en) * | 1994-12-26 | 1996-07-09 | Hitachi Constr Mach Co Ltd | Operating system of construction machinery |
| EP1126088A2 (en) * | 2000-02-18 | 2001-08-22 | Deere & Company | Hydraulic system for the dampening of inertia load |
| KR20050000820A (en) * | 2003-06-25 | 2005-01-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | recycling device and control method of hydraulic energy |
| CN102518156A (en) * | 2012-01-04 | 2012-06-27 | 江苏柳工机械有限公司 | System for accurately controlling the rotation of excavation end of loader digger |
| DE102011008709A1 (en) * | 2011-01-17 | 2012-07-19 | Linde Material Handling Gmbh | Control valve device for controlling dual acting hydraulic stick cylinder of mobile working machine i.e. excavator, has regeneration valve partially closing pressure medium line, when regeneration valve is in regeneration position |
| CN202577399U (en) * | 2012-05-22 | 2012-12-05 | 熔盛机械有限公司 | Movable arm lifting priority control system in medium-sized hydraulic excavator negative flow system |
| CN102864799A (en) * | 2012-10-22 | 2013-01-09 | 三一重机有限公司 | Bucket rod regeneration structure and excavator |
| CN103851040A (en) * | 2014-03-14 | 2014-06-11 | 三一重机有限公司 | Energy regeneration system of excavator and excavator |
| CN204676619U (en) * | 2015-03-30 | 2015-09-30 | 徐州徐工挖掘机械有限公司 | The flow control system that super-tonnage backacter dipper reclaims |
-
2015
- 2015-03-30 CN CN201510143128.8A patent/CN104805877B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08177085A (en) * | 1994-12-26 | 1996-07-09 | Hitachi Constr Mach Co Ltd | Operating system of construction machinery |
| EP1126088A2 (en) * | 2000-02-18 | 2001-08-22 | Deere & Company | Hydraulic system for the dampening of inertia load |
| KR20050000820A (en) * | 2003-06-25 | 2005-01-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | recycling device and control method of hydraulic energy |
| DE102011008709A1 (en) * | 2011-01-17 | 2012-07-19 | Linde Material Handling Gmbh | Control valve device for controlling dual acting hydraulic stick cylinder of mobile working machine i.e. excavator, has regeneration valve partially closing pressure medium line, when regeneration valve is in regeneration position |
| CN102518156A (en) * | 2012-01-04 | 2012-06-27 | 江苏柳工机械有限公司 | System for accurately controlling the rotation of excavation end of loader digger |
| CN202577399U (en) * | 2012-05-22 | 2012-12-05 | 熔盛机械有限公司 | Movable arm lifting priority control system in medium-sized hydraulic excavator negative flow system |
| CN102864799A (en) * | 2012-10-22 | 2013-01-09 | 三一重机有限公司 | Bucket rod regeneration structure and excavator |
| CN103851040A (en) * | 2014-03-14 | 2014-06-11 | 三一重机有限公司 | Energy regeneration system of excavator and excavator |
| CN204676619U (en) * | 2015-03-30 | 2015-09-30 | 徐州徐工挖掘机械有限公司 | The flow control system that super-tonnage backacter dipper reclaims |
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| CN104805877B (en) | 2018-03-06 |
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Effective date of registration: 20190322 Address after: 221000 39 Gaoxin Road, Xuzhou Economic Development Zone, Jiangsu Patentee after: Xuzhou Xugong Mining Machinery Co., Ltd. Address before: 221000 39 Gaoxin Road, Xuzhou Economic Development Zone, Jiangsu Patentee before: XCMG Excavator Machinery Co., Ltd. |
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