CN108547655A - One kind facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment and method - Google Patents

One kind facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment and method Download PDF

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Publication number
CN108547655A
CN108547655A CN201810248355.0A CN201810248355A CN108547655A CN 108547655 A CN108547655 A CN 108547655A CN 201810248355 A CN201810248355 A CN 201810248355A CN 108547655 A CN108547655 A CN 108547655A
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CN
China
Prior art keywords
external poured
hydraulic support
jack
advancing jack
poured
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CN201810248355.0A
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Chinese (zh)
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CN108547655B (en
Inventor
袁永
朱成
刘福泉
刘志恒
袁超峰
孟朝贵
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Priority to CN201810248355.0A priority Critical patent/CN108547655B/en
Publication of CN108547655A publication Critical patent/CN108547655A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/18Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The invention discloses one kind facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment and method, mainly by structure compositions such as external poured advancing jack, assistant pushing bearing, small-sized external poured jack, shank and backing plates, its method and step includes setting assistant pushing bearing, and external poured advancing jack cylinder base is connect with assistant pushing bearing by shank;Operating valve set feed flow is controlled according to specific requirement, adjusts small-sized external poured jack, external poured advancing jack piston end assistant pushing bearing corresponding on fluid coupling shell is affixed by shank;According to the requirement of different dynamic loads, control hydraulic chock running valve group is to external poured advancing jack feed flow, assistant pushing handpiece of scraper conveyer;Hydraulic chock running valve group is controlled, piston rod is made to draw moving hydraulic support by fulcrum of the shank on fluid coupling shell under the action of high-pressure emulsion, completes a work cycle;The present invention is of great significance for improving the production efficiency of working face.

Description

One kind facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment and method
Technical field
The present invention relates to a kind of external poured advancing jacks, in particular to one kind facing upward the universal assistant pushing scraper plate of mining face The method of conveyer head, tail and hydraulic support.
Background technology
As the main corollary equipment of fully-mechanized mining working, drag conveyor is not only responsible for the task of transporting coal, but also is The running track of coalcutter and the passage fulcrum of hydraulic support;Hydraulic support is the important equipment of supported face top plate, protection The safety of equipment and personnel.Therefore drag conveyor, the reliable, stable of hydraulic support, Effec-tive Function will directly affect mine Production capacity and coal mining enterprise economic benefit.
Remaining a large amount of float coal or bottom plate do not cut that flat there are steps before working face is faced upward and adopts or turn to larger, drag conveyor When, since motor side is laid particular stress at handpiece of scraper conveyer, often result in that drag conveyor passage is difficult, floats on head, hydraulic pressure branch Frame, which is drawn, moves a series of problems, such as difficult, and the heavy scraper conveyors such as formula, head push unit failure rate are unloaded especially for end Higher, repair is inconvenient, directly influences working surface production efficiency.Actual field generally uses monomer liquid when encountering such situation Pressure pillar is directly elapsed, to meet the job requirements such as passage, lift bottom.The method not only be easy damage hydraulic prop, The labor intensity for increasing worker is also equipped with larger security risk, easily causes personal injury.
In order to preferably be applicable in underground industrial and mining condition, safeguard work face is normal, keeps the safety in production, and facilitates underground to safeguard, proposes One kind faces upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment and method, reduces the labor intensity of worker, has ensured work The safety coal extraction for making face, the production efficiency for improving working face are equally of great significance.
Invention content
In order to solve the above technical problems, technical solution provided by the invention is:It is universal that one kind facing upward mining working faces end head equipment Auxiliary process apparatus of reversed, wherein end equipment include hydraulic support, drag conveyor and the fluid power idol being set on drag conveyor Clutch, the universal auxiliary process apparatus of reversed include the assistant pushing bearing one and setting between being set to hydraulic support front pillar column leg In the assistant pushing bearing two on fluid coupling shell, the assistant pushing bearing one is elapsed by shank with external poured very heavy The connection of plunger shaft end is pushed up, the assistant pushing bearing two passes through pin hole, shank and external poured advancing jack piston rod top Connection, external poured advancing jack lower part at the top of backing plate and small-sized external poured jack by connecting, the small-sized outer note The very heavy top/bottom part of formula is set on hydraulic support foundation, and bottom is connected between the hydraulic support foundation and drag conveyor holder Portion's advancing jack;
The hydraulic support is equipped with several high-pressure rubber pipes being connect with emulsion power pack, and the high-pressure rubber pipe end passes through Plinth is lived with external poured advancing jack plunger shaft, external poured advancing jack rear chamber, small-sized external poured jack respectively Chamber conducting is filled in, the operating valve set of control high-pressure rubber pipe is additionally provided at the top of the hydraulic support column leg.
As an improvement, the quantity of the assistant pushing bearing two is 4.
As an improvement, the external poured advancing jack is laterally to be arranged, the stroke of the external poured advancing jack away from Step pitch and meet working face liquid supply pressure requirement from being moved more than hydraulic support.
The invention also discloses a kind of working methods for facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, not only may be used To manipulate external poured jack auxiliary dislocation handpiece of scraper conveyer, hydraulic support, and can be according to the variation of job requirement Passage angle is adjusted flexibly in time, the specific steps are:
A, 4 assistant pushing bearings two are welded on drag conveyor fluid coupling shell in advance, while in hydraulic pressure branch It is welded between frame front pillar column leg, fixes assistant pushing bearing one, be then ready for a stroke more than hydraulic support movement step pitch and expired The external poured advancing jack that sufficient working face liquid supply pressure requires, by external poured advancing jack piston/cylinder bottom and hydraulic pressure branch It is welded between frame front pillar column leg, fixed assistant pushing bearing one is connected by shank.
B, according to the different passage of mining face, lift bottom requirement for height is faced upward, operating valve set feed flow is controlled, small-sized outer note is adjusted Formula jack so that external poured advancing jack piston end is fixed with 4 assistant pushing bearings two on fluid coupling respectively; High-pressure rubber hose and plinth are firmly installed, leakage is prevented.The hydraulic power of wherein advancing jack is carried by emulsion power pack For, and have the control of hydraulic chock running valve group.
C, when dislocation handpiece of scraper conveyer, high-pressure emulsion passes through hydraulic chock running valve group, high-pressure rubber hose, connector Seat imports in the plunger shaft of external poured advancing jack, so that piston rod is stretched out, and between hydraulic support front pillar column leg Assistant pushing seat one is fulcrum, pushes the assistant pushing seat two on fluid coupling, reaches mate-assist hydraulic support dislocation and scrape The purpose of plate conveyer head Forward.
D, regulate and control jack operating valve set, high-pressure emulsion imports outer note by operating valve set, high-pressure rubber hose, plinth Formula advancing jack rear chamber makes piston rod under the action of high-pressure emulsion using the shank on fluid coupling shell as fulcrum Moving hydraulic support is drawn, a work cycle is completed.
Compared with prior art, the present invention is used in two front pillar column of drag conveyor fluid coupling shell and hydraulic support It is welded on leg, fixes assistant pushing bearing, hydraulic pressure is elapsed by operating valve set control and the fixed external poured of assistant pushing bearing Jack can not only assist dislocation handpiece of scraper conveyer, tail and draw moving hydraulic support, but also effectively avoid using in the past When hydraulic prop is elapsed, time-consuming, laborious and unsafe problem, the production efficiency for improving working face has weight Want meaning.
Description of the drawings
Fig. 1 is that the present invention is welded assistant pushing seat arrangement schematic diagram on drag conveyor coupling fluid-structure machine shell.
Fig. 2 is that the present invention requires placement external poured hydraulic jack schematic diagram according to passage direction.
Fig. 3 is the working state schematic representation of present invention passage handpiece of scraper conveyer;
Fig. 4 is the working state schematic representation that the present invention draws moving hydraulic support.
As shown in the figure:1, assistant pushing seat one;2, shank;3, operating valve set;4, high-pressure rubber pipe;5, plinth;6, piston Bar;7, bottom advancing jack;8, fluid coupling;9, drag conveyor;10, backing plate;11, external poured advancing jack;12、 Pin hole;13, small-sized external poured jack;14, assistant pushing seat two;15, hydraulic support.
Specific implementation mode
In conjunction with attached drawing 1~4, one kind facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, and wherein end equipment includes Hydraulic support 15, drag conveyor 9 and the fluid-flywheel clutch 8 being set on drag conveyor 9, the universal auxiliary process apparatus of reversed Including the assistant pushing bearing 1 being set between 15 front pillar column leg of hydraulic support and it is set on 8 shell of fluid coupling Assistant pushing bearing 2 14, the assistant pushing bearing 1 are connected by shank 2 and 11 plunger shaft end of external poured advancing jack It connects, the assistant pushing bearing 2 14 is connect by pin hole 12, shank 2 with 11 piston rod of external poured advancing jack, 6 top, institute It states 11 lower part of external poured advancing jack to connect with 13 top of small-sized external poured jack by backing plate 10, the small-sized external poured Very heavy 13 top/bottom part is set on 15 pedestal of hydraulic support, is connected between 9 holder of 15 pedestal of the hydraulic support and drag conveyor It is connected to bottom advancing jack 7;
The hydraulic support 15 is equipped with several high-pressure rubber pipes 4 being connect with emulsion power pack, 4 end of the high-pressure rubber pipe By plinth 5 respectively with 11 plunger shaft of external poured advancing jack, 11 rear chamber of external poured advancing jack, small-sized external poured 13 plunger shaft of jack is connected, and the operating valve set 3 of control high-pressure rubber pipe 4 is additionally provided at the top of 15 column leg of the hydraulic support.
As the present embodiment preferred embodiment, the quantity of the assistant pushing bearing 2 14 is 4.
As the present embodiment preferred embodiment, the external poured advancing jack 11 is laterally to be arranged, described outer The stroke distances of note formula advancing jack 11 are more than 15 moving step pitch of hydraulic support and meet working face liquid supply pressure requirement.
The invention also discloses a kind of working methods for facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, specific Step is:
A, 4 assistant pushing bearings 2 14 are welded on 9 fluid coupling of drag conveyor, 8 shell in advance, while in liquid It is welded between pressure 15 front pillar column leg of holder, fixes assistant pushing bearing 1, be then ready for a stroke more than hydraulic support movement step Away from and meet the external poured advancing jack 11 of working face liquid supply pressure requirement, by 11 piston/cylinder bottom of external poured advancing jack It is welded between 15 front pillar column leg of portion and hydraulic support, fixed assistant pushing bearing 1 is connected by shank 2.
B, according to the different passage of mining face, lift bottom requirement for height is faced upward, 3 feed flow of operating valve set is controlled, is adjusted small-sized outer Note formula jack 13 so that 11 piston end of external poured advancing jack respectively with 4 assistant pushing bearings on fluid coupling 8 2 14 fix;High-pressure rubber hose 4 and plinth 5 are firmly installed, leakage is prevented.Wherein the hydraulic power of advancing jack is by breast Change pump station to provide, and has the control of hydraulic chock running valve group 3.
C, when 9 head of dislocation drag conveyor, high-pressure emulsion by hydraulic chock running valve group 3, high-pressure rubber hose 4, Plinth 5 imports in the plunger shaft of external poured advancing jack 11, and piston rod 6 is made to stretch out, and to be mounted on hydraulic support 15 before Assistant pushing seat 1 between column column leg is fulcrum, pushes the assistant pushing seat 2 14 on fluid coupling 8, reaches mate-assist The purpose of 9 head of hydraulic support dislocation drag conveyor Forward.
D, regulation and control jack operating valve set 3, high-pressure emulsion are imported by operating valve set 3, high-pressure rubber hose 4, plinth 5 11 rear chamber of external poured advancing jack makes piston rod 6 under the action of high-pressure emulsion with the pin on 8 shell of fluid coupling Body 2 is that fulcrum draws moving hydraulic support 15, completes a work cycle.
The present invention and its embodiments have been described above, this description is no restricted, shown in attached drawing Only one of embodiments of the present invention, actual structure is not limited to this.All in all if the ordinary skill of this field Personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution phase As frame mode and embodiment, be within the scope of protection of the invention.

Claims (4)

1. one kind faces upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, wherein end equipment includes that hydraulic support, scraper plate are defeated The fluid-flywheel clutch for sending machine and being set on drag conveyor, it is characterised in that:The universal auxiliary process apparatus of reversed includes setting Assistant pushing bearing one between hydraulic support front pillar column leg and the assistant pushing bearing being set on fluid coupling shell Two, the assistant pushing bearing one is connected by pin hole, shank and external poured advancing jack plunger shaft end, and the auxiliary pushes away It moves bearing two to connect with external poured advancing jack piston rod top by shank, external poured advancing jack lower part passes through It being connect at the top of backing plate and small-sized external poured jack, the small-sized very heavy top/bottom part of external poured is set on hydraulic support foundation, Bottom advancing jack is connected between the hydraulic support foundation and drag conveyor holder;
The hydraulic support is equipped with several high-pressure rubber pipes being connect with emulsion power pack, and the high-pressure rubber pipe end passes through connector Seat respectively with external poured advancing jack plunger shaft, external poured advancing jack rear chamber, small-sized external poured jack piston chamber Conducting, the hydraulic support column leg top are additionally provided with the operating valve set of control high-pressure rubber pipe.
2. one kind according to claim 1 faces upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, it is characterised in that:Institute The quantity for stating assistant pushing bearing two is 4.
3. one kind according to claim 1 faces upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, it is characterised in that:Institute It is laterally to be arranged to state external poured advancing jack, and the stroke distances of the external poured advancing jack are more than hydraulic support movement step Away from and meet working face liquid supply pressure requirement.
4. a kind of working method for facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment, the specific steps are:
A, 4 assistant pushing bearings two are welded on drag conveyor fluid coupling shell in advance, while before hydraulic support It is welded between column column leg, fixes assistant pushing bearing one, be then ready for a stroke more than hydraulic support movement step pitch and meet work The external poured advancing jack for making face liquid supply pressure requirement, before external poured advancing jack piston/cylinder bottom and hydraulic support It is welded between column column leg, fixed assistant pushing bearing one is connected by shank.
B, according to the different passage of mining face, lift bottom requirement for height is faced upward, operating valve set feed flow is controlled, small-sized external poured thousand is adjusted Jin top so that external poured advancing jack piston end is fixed with 4 assistant pushing bearings two on fluid coupling respectively;It will be high Pressure rubber tube is firmly installed with plinth, prevents leakage.The hydraulic power of wherein advancing jack is provided by emulsion power pack, and There is the control of hydraulic chock running valve group.
C, when dislocation handpiece of scraper conveyer, high-pressure emulsion is led by hydraulic chock running valve group, high-pressure rubber hose, plinth In the plunger shaft for entering external poured advancing jack, piston rod is made to stretch out, and with the auxiliary between hydraulic support front pillar column leg Passage seat one is fulcrum, pushes the assistant pushing seat two on fluid coupling, it is defeated to reach mate-assist hydraulic support dislocation scraper plate The purpose for sending machine head to move forward.
D, regulate and control jack operating valve set, high-pressure emulsion is imported external poured and pushed away by operating valve set, high-pressure rubber hose, plinth Jack rear chamber is moved, so that piston rod is drawn as fulcrum using the shank on fluid coupling shell under the action of high-pressure emulsion and moves Hydraulic support completes a work cycle.
CN201810248355.0A 2018-03-24 2018-03-24 One kind facing upward the universal auxiliary process apparatus of reversed of mining working faces end head equipment and method Expired - Fee Related CN108547655B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109252883A (en) * 2018-11-23 2019-01-22 中国矿业大学(北京) A kind of reducible translating cam mechanism bottom lifting device of hydraulic support
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
CN112340364A (en) * 2020-12-01 2021-02-09 湖南煤矿机械有限公司 Auxiliary machine head pushing device of scraper conveyor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201196098Y (en) * 2008-05-21 2009-02-18 开滦精煤股份有限公司范各庄矿业分公司 Auxiliary process apparatus of reversed loader
CN201650324U (en) * 2010-03-12 2010-11-24 中煤北京煤矿机械有限责任公司 Hydraulic rack with auxiliary push unit
CN102120523A (en) * 2010-01-08 2011-07-13 兖州煤业股份有限公司 Slope adjusting device for middle trough of fully-mechanized scraper conveyor for thin seam
CN202402055U (en) * 2011-12-21 2012-08-29 平顶山煤矿机械有限责任公司 Hydraulic support with bottom lifting device
CN203499722U (en) * 2013-09-29 2014-03-26 江苏中机矿山设备有限公司 Adjusting device of scraper conveyor
CN104727838A (en) * 2015-01-12 2015-06-24 辽宁工程技术大学 Hydraulic support of coal mining machine
CN104727839A (en) * 2015-03-16 2015-06-24 中煤北京煤矿机械有限责任公司 Auxiliary pulling device of large-dip-angle working face ended support
CN205532673U (en) * 2016-04-05 2016-08-31 郑州四维矿业机械有限责任公司 Supplementary pusher jack and use device's end hydraulic support

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201196098Y (en) * 2008-05-21 2009-02-18 开滦精煤股份有限公司范各庄矿业分公司 Auxiliary process apparatus of reversed loader
CN102120523A (en) * 2010-01-08 2011-07-13 兖州煤业股份有限公司 Slope adjusting device for middle trough of fully-mechanized scraper conveyor for thin seam
CN201650324U (en) * 2010-03-12 2010-11-24 中煤北京煤矿机械有限责任公司 Hydraulic rack with auxiliary push unit
CN202402055U (en) * 2011-12-21 2012-08-29 平顶山煤矿机械有限责任公司 Hydraulic support with bottom lifting device
CN203499722U (en) * 2013-09-29 2014-03-26 江苏中机矿山设备有限公司 Adjusting device of scraper conveyor
CN104727838A (en) * 2015-01-12 2015-06-24 辽宁工程技术大学 Hydraulic support of coal mining machine
CN104727839A (en) * 2015-03-16 2015-06-24 中煤北京煤矿机械有限责任公司 Auxiliary pulling device of large-dip-angle working face ended support
CN205532673U (en) * 2016-04-05 2016-08-31 郑州四维矿业机械有限责任公司 Supplementary pusher jack and use device's end hydraulic support

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109252883A (en) * 2018-11-23 2019-01-22 中国矿业大学(北京) A kind of reducible translating cam mechanism bottom lifting device of hydraulic support
CN109252883B (en) * 2018-11-23 2023-09-05 中国矿业大学(北京) Movable cam mechanism bottom lifting device capable of resetting for hydraulic support
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
CN112340364A (en) * 2020-12-01 2021-02-09 湖南煤矿机械有限公司 Auxiliary machine head pushing device of scraper conveyor

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