CN106703846A - Hydraulic system of hydraulic support based on electrohydraulic control - Google Patents
Hydraulic system of hydraulic support based on electrohydraulic control Download PDFInfo
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- CN106703846A CN106703846A CN201510777774.XA CN201510777774A CN106703846A CN 106703846 A CN106703846 A CN 106703846A CN 201510777774 A CN201510777774 A CN 201510777774A CN 106703846 A CN106703846 A CN 106703846A
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Abstract
A hydraulic system of hydraulic support based on electrohydraulic control use a distributed computer control system of each support as unit, the control of the system has two way of manual control and the computer electrohydraulic control, the hydraulic support comprises a main control valve bank, an electromagnetism precursor control valve bank, a manual precursor control valve bank and a distributed single-chip microcomputer controller. According to request of different valve, the hydraulic system uses multipoint filtering method repeatedly, cleanliness of medium is guaranteed effectively, reliability of moving valve is improved.
Description
Technical field
The present invention relates to a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control, it is adaptable to mechanical field.
Background technology
The hydraulic system of comprehensive mining hydraulic bracket forms multistage multiunit distributed system architecture from the emulsion power pack of remote central fluid supply to each execution cylinder of each support.It is in parallel between each execution cylinder between carrier unit and in carrier unit.As coal-winning machine is in working face reciprocating cutting, the operations such as drop frame-try to stop people from fighting each other-support-pushing and sliding are carried out according to frame, just can realize moving the propulsion of frame and working face.
The continuous improvement of ability is felled and transported with electrical haulage shearer and large conveying quantity conveyer, the advancing velocity of hydraulic support is into the Main Bottleneck of restriction working surface production ability.It is to improve the main path of advancing velocity of hydraulic powered support to improve through-current capability that electrohydraulic control technology is used to improve operation automation and the configuration of optimization hydraulic system, and the latter is even more conclusive.
The content of the invention
The present invention proposes a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control, and major control Hydraulic Elements from the influence of impacting with high pressure fluctuation, therefore can be improved the sealing property of Hydraulic Elements and increase the service life in off working state and high pressure cut-off.In addition, in addition to the drive magnetic valve of master control stop valve, remaining function magnetic valve in low pressure starting under no load, does not have the influence of instantaneous hydraulic dynamics, and starting current is small, the load points of power supply can be increased.According to the requirement of different valves, using multiple multiple spot filter method, the cleannes of medium are effectively guaranteed, improve the reliability of valve events.
The technical solution adopted in the present invention is：
The electrichydraulic control uses the distributed computer control system with each support as unit, and the control of the system has and control manually and computer electrichydraulic control two ways.It is main to be constituted by master control valve group, electromagnetic pilot control valve group, precursor control by hand valve group and based on the major part of distributed singlechip controller etc. four.Main control valve is the power output control element of forward and backward column and advancing jack, and it can both be driven by electromagnetic priority valve and realize electrichydraulic control, can carry out precursor control by hand by hand-operated valve again.Electrichydraulic control is the major control mode of system, and control column, advancing jack are rapidly completed the main actions such as drop, shifting, liter and the pushing and sliding of support under the conditions of big flow feed flow.Precursor control by hand in addition to it can drive main control valve, front-axle beam short column and adjusts the auxiliary movement such as frame jack then directly to be manipulated by it as the supplement of electrichydraulic control.For any carrier unit being on current working site, frame-shifting frame-support-pushing and sliding are dropped（Delayed completion）It is basic action element.
Under electrichydraulic control mode, the switching of each action command is carried out by clock switch amount and pressure switch amount two ways, and time quantum adds appropriate allowance for the statistical value of actual field, the control for dropping frame stroke.Other actions then make feedback signal using pressure switch signal.Column cavity of resorption is communicated with pressure switch, and the trigger value of pressure switch is the first bulging power of support（Setting）, when setting prop is supported, after pressure reaches just bulging power, pressure switch is opened to controller sending signal；The cylinder bottom of advancing jack is equipped with a bi-bit bi-pass switch valve, the valve is in normally off, rod cavity feed liquor, after trying to stop people from fighting each other in place, the push rod of piston collisions switch valve opens valve, the high pressure liquid connected with rod cavity is applied in pressure switch by switch valve, and just signal in place of trying to stop people from fighting each other is sent to controller after triggering.
In 250m working faces long, the remote central fluid supply of pumping plant, the liquid resistance of feed flow flow, pressure and pipeline（Especially liquid back pipe road）It is the key factor for determining support advancing velocity.Annular feed flow in parallel is carried out from working face head, Caudad support simultaneously with double pump, total feed flow flow can be increased and liquid resistance is substantially reduced back.
The upper and lower cavity area of the carrying column of support is than larger（1：6~8）, during drop post, the liquid measure of cavity of resorption is big, and in common design loop, time liquid resistance is very big, causes drop frame slow.To increase large back liquid through-current capability, reduce the resistance on liquid back pipe road, using liquid technology is bypassed back, i.e., control valve plate to the one in parallel pipeline for only supplying back liquid time liquid stop valve from column cavity of resorption, controlled by bypassing back liquid check valve.When so dropping post, cavity of resorption can return liquid by 2 pipelines simultaneously.2 pipe parallel connections of same diameter, its equivalent drag coefficient is only the 1/4 of former single channel, and experimental test result shows, under the same conditions, post speed drops in the system with liquid is bypassed back can improve more than 1 times.
The shifting booster of general support is more than pushing and sliding power, and to direct-push thrust gear, advancing jack all uses floating piston structure.During pushing and sliding, the piston of floating is empty first to run total travel, and then, piston rod just stretches out moving conveyor.The drawbacks of idle stroke motion of floating piston is caused is the delay of execution action and the fluctuation of system pressure.The advancing jack of fixed piston, is equipped with differential pushing and sliding control loop, the drawbacks of just can overcome floating piston, and can improve pushing and sliding speed.Realize that the different valve of differential circuit is formed by inserted valve.Additionally, the plunger shaft of jack is additionally provided with and bypasses back liquid, to reduce time liquid resistance tried to stop people from fighting each other, speed of trying to stop people from fighting each other is improved.
The beneficial effects of the invention are as follows：Major control Hydraulic Elements from the influence of impacting with high pressure fluctuation, therefore can be improved the sealing property of Hydraulic Elements and increase the service life in off working state and high pressure cut-off.In addition, in addition to the drive magnetic valve of master control stop valve, remaining function magnetic valve in low pressure starting under no load, does not have the influence of instantaneous hydraulic dynamics, and starting current is small, the load points of power supply can be increased.According to the requirement of different valves, using multiple multiple spot filter method, the cleannes of medium are effectively guaranteed, improve the reliability of valve events.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is support electrohydraulic control system figure of the invention.
Fig. 2 is hydraulic support of the invention and corollary equipment relation schematic diagram.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As Fig. 1, electrichydraulic control use the distributed computer control system with each support as unit, the control of the system has and control manually and computer electrichydraulic control two ways.It is main to be constituted by master control valve group, electromagnetic pilot control valve group, precursor control by hand valve group and based on the major part of distributed singlechip controller etc. four.Main control valve is the power output control element of forward and backward column and advancing jack, and it can both be driven by electromagnetic priority valve and realize electrichydraulic control, can carry out precursor control by hand by hand-operated valve again.Electrichydraulic control is the major control mode of system, and control column, advancing jack are rapidly completed the main actions such as drop, shifting, liter and the pushing and sliding of support under the conditions of big flow feed flow.Precursor control by hand in addition to it can drive main control valve, front-axle beam short column and adjusts the auxiliary movement such as frame jack then directly to be manipulated by it as the supplement of electrichydraulic control.For any carrier unit being on current working site, frame-shifting frame-support-pushing and sliding are dropped（Delayed completion）It is basic action element.
Under electrichydraulic control mode, the switching of each action command is carried out by clock switch amount and pressure switch amount two ways, and time quantum adds appropriate allowance for the statistical value of actual field, the control for dropping frame stroke.Other actions then make feedback signal using pressure switch signal.Column cavity of resorption is communicated with pressure switch, and the trigger value of pressure switch is the first bulging power of support（Setting）, when setting prop is supported, after pressure reaches just bulging power, pressure switch is opened to controller sending signal；The cylinder bottom of advancing jack is equipped with a bi-bit bi-pass switch valve, the valve is in normally off, rod cavity feed liquor, after trying to stop people from fighting each other in place, the push rod of piston collisions switch valve opens valve, the high pressure liquid connected with rod cavity is applied in pressure switch by switch valve, and just signal in place of trying to stop people from fighting each other is sent to controller after triggering.
Such as Fig. 2, in 250m working faces long, the remote central fluid supply of pumping plant, the liquid of feed flow flow, pressure and pipeline hinders（Especially liquid back pipe road）It is the key factor for determining support advancing velocity.Annular feed flow in parallel is carried out from working face head, Caudad support simultaneously with double pump, total feed flow flow can be increased and liquid resistance is substantially reduced back.
The upper and lower cavity area of the carrying column of support is than larger（1：6~8）, during drop post, the liquid measure of cavity of resorption is big, and in common design loop, time liquid resistance is very big, causes drop frame slow.To increase large back liquid through-current capability, reduce the resistance on liquid back pipe road, using liquid technology is bypassed back, i.e., control valve plate to the one in parallel pipeline for only supplying back liquid time liquid stop valve from column cavity of resorption, controlled by bypassing back liquid check valve.When so dropping post, cavity of resorption can return liquid by 2 pipelines simultaneously.2 pipe parallel connections of same diameter, its equivalent drag coefficient is only the 1/4 of former single channel, and experimental test result shows, under the same conditions, post speed drops in the system with liquid is bypassed back can improve more than 1 times.
The shifting booster of general support is more than pushing and sliding power, and to direct-push thrust gear, advancing jack all uses floating piston structure.During pushing and sliding, the piston of floating is empty first to run total travel, and then, piston rod just stretches out moving conveyor.The drawbacks of idle stroke motion of floating piston is caused is the delay of execution action and the fluctuation of system pressure.The advancing jack of fixed piston, is equipped with differential pushing and sliding control loop, the drawbacks of just can overcome floating piston, and can improve pushing and sliding speed.Realize that the different valve of differential circuit is formed by inserted valve.Additionally, the plunger shaft of jack is additionally provided with and bypasses back liquid, to reduce time liquid resistance tried to stop people from fighting each other, speed of trying to stop people from fighting each other is improved.
Claims (5)
1. a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control, it is characterized in that：The electrichydraulic control uses the distributed computer control system with each support as unit, and the control of the system has and control manually and computer electrichydraulic control two ways.
2. a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control according to claim 1, it is characterized in that：The electrohydraulic control system is main to be constituted by master control valve group, electromagnetic pilot control valve group, precursor control by hand valve group and based on the major part of distributed singlechip controller etc. four.
3. a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control according to claim 1, it is characterized in that：The main control valve is the power output control element of forward and backward column and advancing jack, and it can both be driven by electromagnetic priority valve and realize electrichydraulic control, can carry out precursor control by hand by hand-operated valve again.
4. a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control according to claim 1, it is characterized in that：The electrichydraulic control is the major control mode of system, and control column, advancing jack are rapidly completed the main actions such as drop, shifting, liter and the pushing and sliding of support under the conditions of big flow feed flow；Precursor control by hand in addition to it can drive main control valve, front-axle beam short column and adjusts the auxiliary movement such as frame jack then directly to be manipulated by it as the supplement of electrichydraulic control.
5. a kind of hydraulic pressure system of hydraulic support based on electrichydraulic control according to claim 1, it is characterized in that：Under electrichydraulic control mode, the switching of each action command is carried out by clock switch amount and pressure switch amount two ways, time quantum adds appropriate allowance for the statistical value of actual field, and the control for dropping frame stroke, other actions then make feedback signal using pressure switch signal.
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| CN201510777774.XA CN106703846A (en) | 2015-11-15 | 2015-11-15 | Hydraulic system of hydraulic support based on electrohydraulic control |
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| CN201510777774.XA CN106703846A (en) | 2015-11-15 | 2015-11-15 | Hydraulic system of hydraulic support based on electrohydraulic control |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339116A (en) * | 2017-08-14 | 2017-11-10 | 兖矿东华重工有限公司 | The quick setting prop hydraulic system and hand-operated direction valve of a kind of coal mine hydraulic supporting |
| CN109695465A (en) * | 2018-12-05 | 2019-04-30 | 山东塔高矿业机械装备制造有限公司 | Hydraulic device for sublevel caving hydrau lic support |
| CN113790074A (en) * | 2021-07-28 | 2021-12-14 | 中国矿业大学 | Long-distance liquid supply system state monitoring system and monitoring method |
-
2015
- 2015-11-15 CN CN201510777774.XA patent/CN106703846A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339116A (en) * | 2017-08-14 | 2017-11-10 | 兖矿东华重工有限公司 | The quick setting prop hydraulic system and hand-operated direction valve of a kind of coal mine hydraulic supporting |
| CN107339116B (en) * | 2017-08-14 | 2023-08-01 | 兖矿东华重工有限公司 | Quick lifting column hydraulic system of coal mine hydraulic support and manual reversing valve |
| CN109695465A (en) * | 2018-12-05 | 2019-04-30 | 山东塔高矿业机械装备制造有限公司 | Hydraulic device for sublevel caving hydrau lic support |
| CN113790074A (en) * | 2021-07-28 | 2021-12-14 | 中国矿业大学 | Long-distance liquid supply system state monitoring system and monitoring method |
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Application publication date: 20170524 |