CN102674192A - Mining high-speed slippage preventive winch - Google Patents
Mining high-speed slippage preventive winch Download PDFInfo
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- CN102674192A CN102674192A CN2011100560480A CN201110056048A CN102674192A CN 102674192 A CN102674192 A CN 102674192A CN 2011100560480 A CN2011100560480 A CN 2011100560480A CN 201110056048 A CN201110056048 A CN 201110056048A CN 102674192 A CN102674192 A CN 102674192A
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Abstract
The invention provides a mining high-speed slippage preventive winch. The mining high-speed slippage preventive winch comprises a winch body, a hydraulic system and a control system, the winch body consists of a disc brake, the hydraulic system comprises a first pipeline and a second pipeline, the first pipeline is used for being connected with a movable drum of the disc brake, the second pipeline is used for being connected with a fixed drum of the disc brake, a first hand-operated brake is serially connected onto the first pipeline, a second hand-operated brake is serially connected onto the second pipeline, and a pressure release protective electromagnetic valve is connected onto the first pipeline between the first hand-operated brake and the movable drum and the second pipeline between the second hand-operated brake and the fixed drum, and electrically connected with the control system. The mining high-speed slippage preventive winch is provided with the pressure release protective electromagnetic valve, hydraulic oil in the disc brake can be unloaded by means of conducting the pressure release protective electromagnetic valve via the control system even if the first hand-operated brake and/or the second hand-operated brake are closed, so that the disc brake is smoothly switched on to realize braking, and high-speed slippage accidents are prevented.
Description
Technical field
The present invention relates to the winch technical field, relate in particular to a kind of mining sliding winch that prevents to amplify.
Background technology
At present, the large-scale winch of China's coal-mine mostly adopts the PLC control system to control, and in the PLC control system, generally all is provided with reliability and the safety that protection and locking improve total system.But, be not provided with about winch always and prevent to amplify sliding comprehensive judgement protection link.
The existing measure that prevents that the winch amplification from sliding is; Emergency stop push button on the employing driving position comes artificial control, in case the driver finds that winch amplification soon is sliding, then pushes the winch emergency stop button on the driving position immediately; Come winch is braked, prevent to amplify sliding purpose to reach.But, when the mine lift winch when transferring rope form attitude or deciliter power-transfer clutch, because operating sequence is complicated; Maloperation very easily takes place in hoistman and check man, and closes the manual brake that is positioned at plate disc brake the place ahead, when manual brake is in closed condition by maloperation; Hydraulic oil in the plate disc brake can't unload; Make winch to brake, it is sliding to cause winch to amplify, and has brought serious consequence for the safety in production of mine.
Summary of the invention
The present invention provides a kind of mining sliding winch that prevents to amplify, and when solving that manual brake is in closed condition by maloperation in the prior art, the hydraulic oil in the plate disc brake can't unload, and makes winch to brake, and causes winch to amplify sliding problem.
The present invention provides a kind of mining sliding winch that prevents to amplify; Comprise winch body, hydraulic efficiency pressure system and control system; Said winch body comprises plate disc brake; Said hydraulic efficiency pressure system comprises and is used for movable drum bonded assembly first pipeline of said plate disc brake and is used for dead block bonded assembly second pipeline with said plate disc brake; Be serially connected with first manual brake on said first pipeline; Be serially connected with second manual brake on said second pipeline, be connected with the decompression protection electromagnetic valve on first pipeline between said first manual brake and said movable drum and on second pipeline between second manual brake and dead block, said decompression protection electromagnetic valve is electrically connected with said control system.
The aforesaid mining sliding winch that prevents to amplify; Wherein, Be connected with the 3rd manual brake between said first pipeline and said second pipeline; Said the 3rd manual brake is connected with said decompression protection electromagnetic valve, and said the 3rd manual brake and the said first pipeline bonded assembly position are between said first manual brake and said movable drum, and said the 3rd manual brake and the said second pipeline bonded assembly position are between said second manual brake and said dead block.
The aforesaid mining sliding winch that prevents to amplify; Wherein, said control system is the PLC control system, and this PLC control system is monitored residing state of this winch and speed simultaneously; And the sliding critical speed of the amplification of the speed of the current state that monitors and setting compared; If the speed of current state greater than the sliding critical speed of the amplification of setting, then is judged to be winch and amplifies sliding omen, said PLC control system output this moment control signal is controlled said decompression protection electromagnetic valve and is carried out pressure release.
The aforesaid mining sliding winch that prevents to amplify, wherein, said PLC control system is amplified pressure release number of times and the pressure release time that sliding real-time speed is controlled the decompression protection electromagnetic valve according to the winch that monitors, and carries out braking by grades.
The aforesaid mining sliding winch that prevents to amplify, wherein, said decompression protection electromagnetic valve is the 2/2-way normally closed solenoid valve.
The aforesaid mining sliding winch that prevents to amplify; Wherein, Said hydraulic efficiency pressure system comprises first, second oil pumping system; Said first, second oil pumping system is connected with the oil inlet of same two-bit triplet hydraulicchange-over valve; The actuator port of said two-bit triplet hydraulicchange-over valve is connected with the first two-bit triplet electromagnetic valve; The actuator port of the said first two-bit triplet electromagnetic valve is communicated with said first manual brake, and the return opening of the said first two-bit triplet electromagnetic valve is connected with time delay valve, and the actuator port of said time delay valve is connected with the second two-bit triplet electromagnetic valve; The actuator port of the said second two-bit triplet electromagnetic valve is communicated with said second manual brake; Be connected with the first 2/2-way electromagnetic valve between the return opening of the said first two-bit triplet electromagnetic valve and the oil inlet of said time delay valve, the actuator port of the said first 2/2-way electromagnetic valve is connected with fuel tank, is connected with the second 2/2-way electromagnetic valve between the oil inlet of the actuator port of said time delay valve and the second two-bit triplet electromagnetic valve; The actuator port of the said second 2/2-way electromagnetic valve is connected with said fuel tank, and said first, second two-bit triplet electromagnetic valve and first, second 2/2-way electromagnetic valve all are electrically connected with said control system.
The aforesaid mining sliding winch that prevents to amplify wherein, all is connected with electro-hydraulic pressure regulator device in said first, second oil pumping system.
The aforesaid mining sliding winch that prevents to amplify; Wherein, Said hydraulic efficiency pressure system also comprises hydraulic pressure accent rope unit, and said hydraulic pressure transfers the rope unit to comprise double acting hydraulic cylinder, and said double acting hydraulic cylinder is connected with the actuator port of two four-way electromagnetic reversing valves; The oil inlet of said two four-way electromagnetic reversing valves is connected with said fuel tank with the 3rd two-bit triplet electromagnetic valve connection, return opening; The oil inlet of said the 3rd two-bit triplet electromagnetic valve is connected with said fuel tank with actuator port connection, the return opening of said time delay valve, and the axis of the said double acting hydraulic cylinder in said winch body upper edge is provided with two travel switches, and the piston rod of said double acting hydraulic cylinder is provided with the trigger part that is used to trigger said travel switch; Said trigger part is between two said travel switches, and two said travel switches all are electrically connected with said control system.
The aforesaid mining sliding winch that prevents to amplify, wherein, the said first 2/2-way electromagnetic valve is the 2/2-way normally open solenoid valve, the said second 2/2-way electromagnetic valve is the 2/2-way normally closed solenoid valve.
The mining sliding winch that prevents to amplify provided by the invention; Be connected the decompression protection electromagnetic valve on first pipeline between first manual brake and movable drum and on second pipeline between second manual brake and dead block,, detecting in control system and to be about to take place to amplify when sliding even when first manual brake and/or second manual brake are in closure state by maloperation; Control system is sent control signal; Make decompression protection electromagnetic valve dead electricity and conducting, with the hydraulic oil in plate disc brake unloading and flow back to fuel tank, in plate disc brake under the situation of no oil pressure; Plate disc brake is realized smoothly closing a floodgate and is braked, thereby has prevented to amplify the generation of sliding accident.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is this mining hydraulic system principle figure that prevents to amplify sliding winch;
Fig. 2 is the mining control system schematic circuit diagram that prevent to amplify sliding winch of the present invention.
Reference numeral:
1,2-oil pump; 4,6-electro-hydraulic pressure regulator device; The switching-over of surging of 5-two-bit triplet
Valve;
The 9-time delay valve; K
1, K
2-travel switch; G
1-Di three two-bit triplet electromagnetism
Valve;
G
2-two four-way electromagnetic G
3-the first two-bit triplet electricity G
3'-second two-bit triplet
Change-over valve; Magnet valve; Magnet valve;
G
4-the first 2/2-way G
5-the second 2/2-way electricity G
6-decompression protection electromagnetic valve;
Electromagnetic valve; Magnet valve;
The D-motor; 7-first pipeline; 8-second pipeline;
10-first manual brake; 11-second manual brake; Q11-safety return circuit power supply is opened
Close;
S18-transfers cord switch; K40-transfers the rope relay; K36, K46, K48, K49,
The K50-relay;
K15, the normally closed S19-lock inspection switch that touches of K16-; K45, K47-clutch position
The point; Relay;
The K60-protective relay; 12-the 3rd manual brake; The 13-double acting hydraulic cylinder.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The mining sliding winch that prevents to amplify provided by the invention comprises winch body, hydraulic efficiency pressure system and control system.
The winch body mainly comprises parts such as base, drive motor, retarder, cylinder and plate disc brake, because the winch body belongs to prior art, its concrete formation and annexation is not given unnecessary details here.
Wherein, Hydraulic efficiency pressure system is as shown in Figure 1, comprises fuel tank, is connected with two first oil pumping systems that are in parallel and second oil pumping system on the fuel tank; First oil pumping system and second oil pumping system all are made up of series connected filter of oil pipe and oil pump 1,2; Oil pump is driven by cooresponding motor D, and, in first oil pumping system and second oil pumping system, all be connected electro-hydraulic pressure regulator device 4,6; And electro-hydraulic pressure regulator device 4,6 is connected on the pipeline of oil pump 1,2 fuel-displaced sides, and the oil pressure that goes out of first oil pumping system and second oil pumping system is regulated.First oil pumping system is connected with the oil inlet of second oil pumping system with same two-bit triplet hydraulicchange-over valve 5; This two-bit triplet hydraulicchange-over valve 5 judges automatically to be to connect first oil pumping system or connect second oil pumping system according to the oil pressure of first oil pumping system and second oil pumping system.
Actuator port at two-bit triplet hydraulicchange-over valve 5 has connected one first two-bit triplet electromagnetic valve G
3, this first two-bit triplet electromagnetic valve G
3Actuator port on connect on movable drum bonded assembly first pipeline 7, the first pipelines 7 be used for plate disc brake and be serially connected with first manual brake 10, this first two-bit triplet electromagnetic valve G
3Return opening be connected with a time delay valve 9 through oil pipe, the actuator port of this time delay valve 9 is connected with one second two-bit triplet electromagnetic valve G through pipeline
3', this second two-bit triplet electromagnetic valve G
3' actuator port on connect dead block bonded assembly second pipeline 8 be used for plate disc brake, on second pipeline 8, be serially connected with second manual brake 11.First, second two-bit triplet electromagnetic valve G
3, G
3' all be electrically connected first, second two-bit triplet electromagnetic valve of control system control G with control system
3, G
3' keying, realize whole oil circuit set up oil pressure or the unloading oil pressure.The control system here is the PLC control system.
For whole hydraulic circuit is played a protective role, at the first two-bit triplet electromagnetic valve G
3The oil inlet of return opening and time delay valve 9 between be connected with the first 2/2-way electromagnetic valve G
4, the first 2/2-way electromagnetic valve G
4Actuator port be connected with fuel tank; The actuator port of time delay valve 9 and the second two-bit triplet electromagnetic valve G
3' oil inlet between be connected with the second 2/2-way electromagnetic valve G
5, the second 2/2-way electromagnetic valve G
5Actuator port be connected first, second two-bit triplet electromagnetic valve G with said fuel tank
3, G
3' and first, second 2/2-way electromagnetic valve G
4, G
5All be electrically connected with said control system.The first 2/2-way electromagnetic valve G
4Be normally open solenoid valve, the second 2/2-way electromagnetic valve G
5Be normally closed solenoid valve, when the winch normal operation, the first 2/2-way electromagnetic valve G
4Be in dead electricity oil circuit off-state, the second 2/2-way electromagnetic valve G
5Be in electric oil circuit off-state.This moment, whole hydraulic efficiency pressure system was set up normal operating oil pressure.
On the actuator port of time delay valve 9, also be connected with hydraulic pressure and transfer the rope unit, this hydraulic pressure transfers the rope unit to comprise double acting hydraulic cylinder 13, this double acting hydraulic cylinder 13 and two four-way electromagnetic reversing valve G
2Actuator port connect these two four-way electromagnetic reversing valve G
2Oil inlet and the 3rd two-bit triplet electromagnetic valve G
1Connection, return opening are connected with above-mentioned fuel tank.Said the 3rd two-bit triplet electromagnetic valve G
1Oil inlet be connected with above-mentioned fuel tank with actuator port connection, the return opening of time delay valve 9.Axis along double acting hydraulic cylinder 13 on the winch body is provided with two travel switch K1, K2; The piston rod of double acting hydraulic cylinder 13 is provided with the trigger part that is used to trigger said travel switch K1, K2; And trigger part is between two said travel switch K1, K2, and wherein above-mentioned two travel switch K1, K2 all are electrically connected with said control system.The signal that control system is transmitted according to travel switch K1, K2 comes this double acting hydraulic cylinder 13 of control corresponding flexible, transfers rop exercise to do.
Also have; When lock overhauls, plate disc brake being overhauled; Need divide into groups to overhaul to movable drum and dead block, for preventing that when it is divided into groups to overhaul the hydraulic oil in first pipeline 7 and second pipeline 8 circulate each other; Special between first pipeline 7 and second pipeline 8, be connected the 3rd manual brake 12; The 3rd manual brake 12 is connected with the decompression protection electromagnetic valve, and the 3rd manual brake 12 and first pipeline, 7 bonded assembly positions are stating between first manual brake 10 and the said movable drum, and the 3rd manual brake 12 and second pipeline, 8 bonded assembly positions are between moving lock 11 of second-hand and said dead block.When the winch normal operation, the 3rd manual brake 12 is in opening, and at this moment, the decompression protection electromagnetic valve can normally carry out pressure release work after detecting the amplification cunning.When lock overhauls, close the 3rd manual brake 12, be not communicated with between first pipeline 7 and second pipeline 8 this moment, can overhaul separately movable drum and dead block.
Below in conjunction with control system schematic circuit diagram as shown in Figure 2 this mining principle of work of amplifying sliding winch that prevents is introduced.
When winch normally moves, transfer cord switch S18 to be in off-state, safety return circuit source switch Q11 is in closure state.It is electric that the coil of transferring rope relay K 40 this moment and lock maintenance loop can't get, winch hardware security loop under failure-free situation relay K 36 electric, its open contact is started from closure state.At this moment, the 3rd two-bit triplet electromagnetic valve G
1(reach the mark that hereinafter relates to hydraulic unit here and see Fig. 1 simultaneously) and two four-way electromagnetic reversing valve G
2Can't get electricly, drum clutch is in closure state, and clutch position relay K 45, K47 get.The first two-bit triplet electromagnetic valve G
3With the second two-bit triplet electromagnetic valve G
3' under the state of the contact K45 adhesive of contact K40 that transfers the rope relay and clutch position relay all; In case open first, second manual brake; First pipeline 7 and second pipeline 8 will be set up oil pressure; Promptly can open the movable drum and the dead block of plate disc brake, remove drag, this moment, winch can normally be driven.When the winch normal operation, the second 2/2-way electromagnetic valve gets electric G
5, under the situation of not pulleying, the coil of pulleying relay gets electric its cooresponding normally closed contact K15, K16 disconnection, the first 2/2-way electromagnetic valve dead electricity G at this moment of making up and down
4Whole hydraulic circuit can be set up normal oil pressure.
When winch transfers rop exercise to do, transfer cord switch S18 to be in closure state, it is electric to transfer the coil of rope relay K 40 to get, and makes the 3rd two-bit triplet electromagnetic valve G
1Get electric G with two four-way electromagnetic reversing valves
2, and lock inspection switch S19 is closed, it is electric that the coil of relay K 48, K49 gets, and makes its normally closed contact break off, at this moment the first two-bit triplet electromagnetic valve G
3With the second two-bit triplet electromagnetic valve G
3' dead electricity; Double acting hydraulic cylinder carries out expanding-contracting action accordingly; Trigger part on the piston rod of double acting hydraulic cylinder (being power-transfer clutch) when touching arbitrary travel switch relay K 46, K50 get electricly, the normally closed contact of relay K 46 breaks off, then the 3rd two-bit triplet electromagnetic valve G
1Dead electricity transfers the rope process to finish.The first two-bit triplet electromagnetic valve G in whole accent rope process
3With the second two-bit triplet electromagnetic valve G
3' all can't get electric, its to winch normally transfer the rope play a protective role.
Under the winch normal working, the coil of protective relay K60 is not charged, and its normally closed contact is in closure state, at this moment decompression protection electromagnetic valve G
6Electric, its oil circuit is obstructed, makes win pipeline 7 and second pipeline 8 can normally set up oil pressure; Come brake off, the protective relay K60 here adopts the normally closed contact type, mainly is for when the winch normal operation; Can make the coil of protective relay K60 need not be charged; Can avoid like this relay being caused damage,, and then improve the whole reliability that prevents to amplify sliding system along with the raising of protective relay K60 functional reliability because of relay coil is long charged.The winch amplification is sliding in case PLC determines, and promptly the output protection signal makes the coil of protective relay K60 charged, attracts its normally closed contact to open, at this moment decompression protection electromagnetic valve G
6Dead electricity, its oil circuit conducting, the hydraulic oil in first pipeline 7 and second pipeline 8 is through decompression protection electromagnetic valve G
6Flow back to fuel tank, reached the purpose of pressure release, in first pipeline 7 and second pipeline 8, do not exist under the situation of oil pressure, plate disc brake can be realized normal brake.Because decompression protection electromagnetic valve G
6Be installed in the place ahead that first pipeline 7 and second pipeline 8 are positioned at the mobile direction of first, second manual brake 10,11 hydraulic oil; Even first, second manual brake 10,11 is in closed condition by maloperation like this; Hydraulic oil in first pipeline 7 and second pipeline 8 also can unload normally; Having guaranteed can normal braking, has avoided occurring amplifying sliding problem.
Judge that at PLC winch amplifies when sliding, it is that the master of accent rope signal, winch drag brake maintenance signal and the winch of rate signal, winch according to winch makes the handle position signal comprehensively judge the feature that amplification is slided.Make handle be in zero-bit or winch being in when transferring rope or lock inspecting state main, when the speed that detects winch during greater than the sliding critical speed 0.3m./s of the amplification of default, then be judged as and amplify sliding omen, control system output speed-slackening signal makes decompression protection electromagnetic valve G
6Dead electricity is braked first pipeline 7 and 8 pressure releases of second pipeline.Amplifying sliding critical speed can confirm according to concrete condition of service, for example can be set in the present embodiment to be 0.3m./s, but it can not only be confined to 0.3m./s.Certainly, in order to improve the reliability of system, it is low excessively that the sliding critical speed of the amplification here cannot be provided with, and was provided with when hanging down to occur misoperation easily, also brakes when causing braking.
In addition, no matter under any mode of operation, amplify sliding omen as long as the speed that detects winch, then is judged as winch greater than 10% of command speed, control system output speed-slackening signal makes decompression protection electromagnetic valve G
6Dead electricity is braked first pipeline 7 and 8 pressure releases of second pipeline.
The judgement of pair twist vehicle speed is to be installed in the shaft encoder photosignal on winch main shaft and the drive motor through collection, and transfers to PLC and calculate the speed that obtains final winch.
For the braking of winch, can confirm the number of times and the brake lag length of winch braking according to the actual speed of winch, when preventing because of the winch high-speed operation, step braking and cause serious accident.Adopt above-mentioned brake mode to realize braking by grades, played buffer action, make brake percentage more steady.The number of times of winch braking and brake lag length are to realize through the pressure release number of times and the pressure release time of PLC control decompression protection electromagnetic valve.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (9)
1. one kind miningly prevents to amplify sliding winch; Comprise winch body, hydraulic efficiency pressure system and control system; Said winch body comprises plate disc brake; Said hydraulic efficiency pressure system comprises and is used for movable drum bonded assembly first pipeline of said plate disc brake and is used for dead block bonded assembly second pipeline with said plate disc brake; Be serially connected with first manual brake on said first pipeline, be serially connected with second manual brake on said second pipeline, it is characterized in that; Be connected with the decompression protection electromagnetic valve on first pipeline between said first manual brake and said movable drum and on second pipeline between said second manual brake and said dead block, said decompression protection electromagnetic valve is electrically connected with said control system.
2. the mining sliding winch that prevents to amplify according to claim 1; It is characterized in that; Be connected with the 3rd manual brake between said first pipeline and said second pipeline; Said the 3rd manual brake is connected with said decompression protection electromagnetic valve, and said the 3rd manual brake and the said first pipeline bonded assembly position are between said first manual brake and said movable drum, and said the 3rd manual brake and the said second pipeline bonded assembly position are between said second manual brake and said dead block.
3. the mining sliding winch that prevents to amplify according to claim 1 and 2; It is characterized in that; Said control system is the PLC control system; This PLC control system is monitored residing state of this winch and speed simultaneously, and the speed of the current state that monitors and the sliding critical speed of amplification of setting are compared, if the speed of current state is greater than the sliding critical speed of the amplification of setting; Then be judged to be winch and amplify sliding omen, said PLC control system output this moment control signal is controlled said decompression protection electromagnetic valve and is carried out pressure release.
4. the mining sliding winch that prevents to amplify according to claim 3 is characterized in that, said PLC control system is amplified pressure release number of times and the pressure release time that sliding real-time speed is controlled the decompression protection electromagnetic valve according to the winch that monitors, and carries out braking by grades.
5. the mining sliding winch that prevents to amplify according to claim 1 and 2 is characterized in that said decompression protection electromagnetic valve is the 2/2-way normally closed solenoid valve.
6. the mining sliding winch that prevents to amplify according to claim 1 and 2; It is characterized in that; Said hydraulic efficiency pressure system comprises first, second oil pumping system; Said first, second oil pumping system is connected with the oil inlet of same two-bit triplet hydraulicchange-over valve; The actuator port of said two-bit triplet hydraulicchange-over valve is connected with the first two-bit triplet electromagnetic valve; The actuator port of the said first two-bit triplet electromagnetic valve is communicated with said first manual brake, and the return opening of the said first two-bit triplet electromagnetic valve is connected with time delay valve, and the actuator port of said time delay valve is connected with the second two-bit triplet electromagnetic valve; The actuator port of the said second two-bit triplet electromagnetic valve is communicated with said second manual brake; Be connected with the first 2/2-way electromagnetic valve between the return opening of the said first two-bit triplet electromagnetic valve and the oil inlet of said time delay valve, the actuator port of the said first 2/2-way electromagnetic valve is connected with fuel tank, is connected with the second 2/2-way electromagnetic valve between the oil inlet of the actuator port of said time delay valve and the second two-bit triplet electromagnetic valve; The actuator port of the said second 2/2-way electromagnetic valve is connected with said fuel tank, and said first, second two-bit triplet electromagnetic valve and first, second 2/2-way electromagnetic valve all are electrically connected with said control system.
7. the mining sliding winch that prevents to amplify according to claim 6 is characterized in that, all is connected with electro-hydraulic pressure regulator device in said first, second oil pumping system.
8. the mining sliding winch that prevents to amplify according to claim 6; It is characterized in that; Said hydraulic efficiency pressure system also comprises hydraulic pressure accent rope unit; Said hydraulic pressure transfers the rope unit to comprise double acting hydraulic cylinder; Said double acting hydraulic cylinder is connected with the actuator port of two four-way electromagnetic reversing valves, and the oil inlet of said two four-way electromagnetic reversing valves is connected with said fuel tank with the 3rd two-bit triplet electromagnetic valve connection, return opening, and the oil inlet of said the 3rd two-bit triplet electromagnetic valve is connected with said fuel tank with actuator port connection, the return opening of said time delay valve; The axis of the said double acting hydraulic cylinder in said winch body upper edge is provided with two travel switches; The piston rod of said double acting hydraulic cylinder is provided with the trigger part that is used to trigger said travel switch, and said trigger part is between two said travel switches, and two said travel switches all are electrically connected with said control system.
9. the mining sliding winch that prevents to amplify according to claim 6 is characterized in that the said first 2/2-way electromagnetic valve is the 2/2-way normally open solenoid valve, and the said second 2/2-way electromagnetic valve is the 2/2-way normally closed solenoid valve.
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| CN201110056048.0A CN102674192B (en) | 2011-03-08 | 2011-03-08 | Mining high-speed slippage preventive winch |
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| CN201110056048.0A CN102674192B (en) | 2011-03-08 | 2011-03-08 | Mining high-speed slippage preventive winch |
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Cited By (3)
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| CN103145058A (en) * | 2013-02-22 | 2013-06-12 | 山西潞安环保能源开发股份有限公司 | Emergency stop signal emitting device |
| CN110762086A (en) * | 2019-10-15 | 2020-02-07 | 徐州立方机电设备制造有限公司 | Hydraulic locking device of vertical shaft hybrid lifting system |
| CN113236694A (en) * | 2021-04-01 | 2021-08-10 | 中国长江电力股份有限公司 | Self-resetting air brake braking device of large hydroelectric generator and abrasion detection method |
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| CN103145058A (en) * | 2013-02-22 | 2013-06-12 | 山西潞安环保能源开发股份有限公司 | Emergency stop signal emitting device |
| CN110762086A (en) * | 2019-10-15 | 2020-02-07 | 徐州立方机电设备制造有限公司 | Hydraulic locking device of vertical shaft hybrid lifting system |
| CN110762086B (en) * | 2019-10-15 | 2021-07-27 | 徐州立方机电设备制造有限公司 | Hydraulic locking device of vertical shaft hybrid lifting system |
| CN113236694A (en) * | 2021-04-01 | 2021-08-10 | 中国长江电力股份有限公司 | Self-resetting air brake braking device of large hydroelectric generator and abrasion detection method |
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|---|---|
| CN102674192B (en) | 2014-08-06 |
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