CN205135687U - Pure water hydraulic support for coal mine - Google Patents

Abstract

The utility model provides a pure water hydraulic support for coal mine, include back timber (1) that base (2) screen roof beam (3), pole (5) is passed to front and back connecting rod (4), and stand (6), jack (7) and valves and control system, hydraulic support's dynamic medium uses the pure water, the pure water process deionizationization of using as dynamic medium, thus the pure water replaces the emulsion to solve the pollution problem, and the hydro -cylinder of stand (6) and valves and coupling dispose anticorrosive cladding material, replacement aqueous medium system is pressed in the hydro -cylinder area of stand (6) and jack (7), and the aqueous medium can flow anticorrosively, covers the corrosion protection of micro -nano cladding material in order to realize hydraulic component on stand (6) and jack (7), and film is in advance added to stand (6) and jack (7) internal surface, realizes going on static stand (6) and jack (7) internal surface that the membrane is anticorrosive in advance.

Description

A kind of colliery pure water hydraulics support

Technical field

The application relates to a kind of hydraulic prop device, in particular to a kind of colliery pure water hydraulics support.

Background technology

In the past, at home and abroad in coal production, wooden prop, timber cap or metal friction pillar articulated roof beam is substantially adopted to carry out supporting roof.Since Britain in 1954 develops hydraulic support first, hydraulic support to cave in the generation of event owing to can reduce mine, drastically increase the safety of colliery operation, hydraulic support starts to be widely used in coal mine work area, simultaneously along with machinery replaces artificial iterative method, hydraulic support is also one of most important equipment in comprehensive mechanized coal mining method.

Current national colliery shares more than 8000 mine, nearly more than 20,000 work planes, annual production is 3,500,000,000 tons of coals, coal mining outfit and accessory consumption year amount of purchase nearly hundred billion, from whole world aspect, fully-mechanized mining equipment uses dynamic medium to be emulsion, the mixture of emulsion is 95%-98% neutral water+3%-5% oil emulsion composition, the ratio of oil emulsion is a fluctuation, because comprehensive mechanical coal mining equipment does not have a complete set of equipment, substantially be all purchase from each producer, do not form unified standardization, the ratio of oil emulsion between each equipment is caused to be difficult to reach consistent, thus cause the waste of oil emulsion, reduce plant equipment operating efficiency simultaneously.

Because equipment is uneven, concentration of emulsion used is caused to control bad, oil emulsion has a 3%-5% fluctuation, domestic annual consumption 120,000 tons of oil emulsions, form year 300-400 ten thousand tons, existing about 4,000 ten thousand tons of emulsions within passing 10 years, have almost been had all to be disposed to underground coal mine, cause very serious, permanent, large-area water pollution, even part mine water seedbed is seriously damaged all, relate to 16 provinces, the whole nation, especially Shanxi, Shaanxi, the Inner Mongol, Henan, Shandong, the large province of the producing coal such as Anhui and Xinjiang, pollution loss is inestimable, become colliery, a world difficult problem.

Simultaneously because emulsion precision and dustiness mismanagement cause a large amount of support oil cylinder and valve corrosion seriously, scrap the amount of money about 5,000,000,000 year.The system corrosion main forms that emulsion quality problems cause is: hole (point) loses, cavitation erosion, erosion corrosion, bacterial corrosion, galvanic corrosion, intercrystalline corrosion, stress-corrosion cracking.In addition combine to adopt to equip and slap together (many families are supporting) by many families are discrete, matching is poor, and quality is uneven, and automaticity is low, and causing trouble takes place frequently, and labour intensity is large, and operating personnel are too much, poor stability.

Because level of integrated system is not high in prior art, and the use of oil emulsion, cause production efficiency of equipment low, and severe contamination water body.

Summary of the invention

Pure water environment-friendly intelligent combine coal mining unit G-CCMU, realize Highgrade integration and the systematization of coal excavation apparatus, to enhance productivity and the matching of unit, intelligent combine coal mining unit G-CCMU adopts pure water dynamic medium simultaneously, achieves the intelligent environment protection of coal excavation apparatus.

Concrete, a complete set of equipment pure water base environment-friendly intelligent combine coal mining unit G-CCMU, comprising: coal mining system, fortune coal measures system, support system, electric power system, pure water dynamical system, central monitoring system.

Coal mining system, main finger refers to that on work plane, coal seam gathers relevant system in Mine Production, master operation has coal cutting and coalings, the mode of coal cutting has one-way coal cutting and two-ways coal cutting: one-way coal cutting, the up coal cutting of coal-winning machine, descending cleaning float coal, pushes away one and cuts dark, is applicable to coal seam thickness slightly larger than diameter of cylinder and the tough and tensile condition of ature of coal; Two-ways coal cutting has two kinds of modes, and one is a round cutter, and when coal seam is thicker, coal-winning machine up subsides top board cut, pastes floor cut and also clear up float coal time descending, this time coal-winning machine come and go two strokes all cut mine, but work plane only advances one to cut dark; Another kind is round two cuttves, and coal seam thickness is close to diameter of cylinder, and the not sticky top board in coal seam, and can realize bidirectional cutting, it is dark that such round trip respectively advances rib one to cut.The coal-winning machine of the application can have multiple mining way, is equipped with the coal-winning machine of corresponding coal cutting mode according to the needs of work plane.

Fortune coal measures system, mainly cutting coal machine is extracted the coal cinder transportation system that the coal cinder then collected transports out mine, its chief component is transporter, and transporter comprises transmission device, scraper chain, chute, protective device, chain tightener, push unit.

Support system, support system mainly plays the effect that work plane supports, effectively can prevent heavy roof fall, what support system mainly comprised is hydraulic support, hydraulic support take highly pressurised liquid as power, what combined by certain connected mode by some Hydraulic Elements (oil cylinder and valve member) and some hardwares a kind ofly supports and the coal-face equipment of controlroof, hydraulic support is used to effectively and reliably support and control face roof, can also move forward and propulsioning face conveyer simultaneously, with cutting coal machine, conveyer supports the use, it is high that hydraulic support has structural strength, supporting performance is good, advancing velocity is fast, the advantage such as safe and reliable, coal-face can be made to reach high yield, high effect and high exploitation rate, reduce labor intensity, reduce costs and drivage ratio, realize safety in production.

Hydraulic support relies on highly pressurised liquid, column and corresponding power jack can realize rising frame, falls frame, pushing and sliding, moves frame four elemental motions: rise frame and operating valve is placed in " rising frame " position, the highly pressurised liquid transported through pressure hose by pumping plant enters column cavity of resorption by hydraulic control one-way valve; The liquid of upright post upper cavity flow to liquid back pipe by control valve, so the protruding support of column rises; Pushing and sliding, under the state that support is in support, control valve is placed in " pushing and sliding " position, highly pressurised liquid enters the left chamber of advancing jack through control valve; Its right chamber liquid flow to liquid back pipe through control valve.Now, advancing jack piston rod stretches out, and pushes working face conveyor to rib.Pushing distance is generally one of coal-winning machine and cuts dark; Fall frame and control valve is got to " falling frame " position, highly pressurised liquid flows into the epicoele of column through control valve, and opens hydraulic control one-way valve simultaneously; The liquid of column cavity of resorption flow to liquid back pipe after hydraulic control one-way valve, control valve, so column retraction, support height reduces; Move frame, after support unloading (falling frame) or partial relief, control valve is got to " moving frame " position, highly pressurised liquid enters the right chamber of advancing jack; Jack left chamber low pressure liquid flows back to liquid back pipe road, and now jack cylinder body drives support to move to right.The distance of its movement general is equal with the distance of pushing and sliding.

Electric power system, electric power system mainly refers to for coal mining unit provides the system of electric power, comprise provide from ground electric power and the generating equipment of emergency, thus to realize the continual supply of electric power of coal mining unit.

Pure water dynamical system, refer to as coal mining unit provides required pure water, special pure water dynamical system comprises ultrapure water preparation device, thus obtains as the pure water of dynamic medium use, also to carry out deionization for the pure water obtained.

Central monitoring system, carries out Centralized Monitoring to coal mining unit, realizes the intellectuality of the system integration and unit.Combine and adopt central monitoring system with crossheading Surveillance center for core, by communication network by coal-winning machine, support electrohydraulic control system, scrapper conveyor control system, pumping station controlling system, video monitoring system, the subsystems such as voice block sytem organically combine, coordinate each data among systems transmission, realize the real-time display to the remote monitoring of fully-mechanized mining working equipment and various data in crossheading Surveillance center or ground maneuvers command centre, and realize three machine interlocks according to coal winning technology, realize the few peopleization of work plane, equipment and personal safety protection, the function such as fault diagnosis and sound and light alarm.

Crossheading Surveillance center: realize work plane and crossheading equipment real-time state monitoring, fault pre-alarming and location; To centralized Control, the protection of the equipment such as scrapper conveyor, elevating conveyor, crushing engine.

Electrohydraulic control system: realize hand behaviour adjacent-support control, work plane remote pilot, separately realizes remote visible in conjunction with crossheading Surveillance center and coal-winning machine and controls, automatically moves frame, auto spraying with machine.Coal-winning machine real time data is passed to support electric-control system by wireless or wired mode and is finally uploaded to crossheading Surveillance center.

Coal-winning machine: by remote field with machine operation, possesses the detection of high-precision spatial position, memory cut function.Possess intelligent protection and fault diagnosis functions simultaneously.

Video system: be arranged on support, the video monitoring system of crossheading can collecting work face panoramic operation real-time video, and upload crossheading and ground monitoring center.

Transporter: scrapper conveyor on-Line Monitor Device can monitor the key parameter such as reductor oil temperature oil level, cooling water pressure, flow, motor axle temperature of scrapper conveyor, elevating conveyor, crushing engine.

Liquid-supplying system: internal control is established one's own system, realizes centralized Control with crossheading Surveillance center again simultaneously.Emulsification pump variable frequency control, emulsion on-line monitoring and automatic mixing, water treatment control automatically, return the high reliability that the advanced functions such as liquid filtration pressure difference on-line monitoring ensure that support.

Voice block sytem: run through work plane and crossheading, realizes voice communication and emergency device latchup.The defencive functions such as electric leakage, disconnected phase, short circuit, overload are directly realized by switch.

Crossheading Surveillance center provides network interface and related software Interface realization and Mine Management System integrated.

Combine and adopt central monitoring system feature and have:

Highly integrated and modularization

Control system, completely by 31 independent research manufactures, realizes each subsystem Seamless integration-, from the effective coupling that ensure that to the full extent between each subsystem of control system.

High safe, highly reliable

Electrohydraulic control system adopts the configuration mode (every 3 support installing 1 bracket controller) of 1 control 3, and bracket controller volume is 259mm × 87mm × 109mm, and industry is minimum; Coordinate support straighforward operation, bracket controller can be arranged on front column rear, away from rib, effectively prevents from blowing out the impact caused bracket controller.

System critical piece IP68 degree of protection, configures German imported with original packaging electro hydraulic valve, and support operator safety guaranteed by Remote operation support; Work plane optional position multiple spot gas, wind speed, Humidity Detection interlocking with power-equipment also can be realized except carrying out support and controlling.Below support, personnel's detection was lost efficacy with automatic function and was interlocked.Back timber level of incline monitoring function prevents coal-winning machine cut back timber.

Efficiently, energy-conservation

Support moves frame with machine automatically, auto spraying improves coal mining efficiency, and emulsion liquid-feed variable frequency control is significantly energy-conservation.

Easy use, easy care

Centralized control system adopts full Chinese Man-machine Interface, Real-Time Monitoring and fault self-diagnosis, and the analysis of causes is also carried out in quick position trouble point, is easy to use, safeguard.

Between coal-winning machine and support, data transmit wireless mode

Between coal-winning machine and support, data transmission adopts wireless mode, and without the need to infrared sensor, coal mechanomotive force cable no longer needs Shielded Twisted Pair simultaneously.

Scrapper conveyor on-line monitoring

Possess scrapper conveyor on-line measuring device, detect reductor oil temperature oil level, cooling water pressure, flow, motor axle temperature, operating current, voltage, insulation etc.

Work plane video and data upload

The infrared intrinsic safety video camera of every 3 support installing one, full face video monitoring, simultaneously three machine datas and real-time video synchronized upload ground monitoring center, realize and mine integration of information system.

Crossheading Surveillance center, crossheading Surveillance center is the control axis of whole work plane, by two high-performance explosion-proof Industrial Personal Computer (IPC)s, four 22 inch liquid crystal display screens, forms with the operating desk at graphical simulation interface.By gathering each subsystem real time data, carrying out logical operation, sending control instruction and data in real time, make each equipment reach optimum Match duty.Crossheading Surveillance center is as the exchanges data maincenter of down-hole and ground control centre, and it function possessed comprises:

Function for monitoring

The each key parameter Real-Time Monitoring of working surface coal mining machine, hydraulic support, scrapper conveyor, elevating conveyor, crushing engine, liquid-supplying system, electric power system, stores with the display of figure, animation, word and video mode.

Mounting system, all bracket upright post pressure can be shown, pass stroke, set cap level inclination, latch buttons state, each controller communications status, the fault of electromagnetic valve driver, solenoid control cable fault locating and displaying, can arrange electrohydraulic control system parameter, storage etc.

Coal-winning machine system, coal seat in the plane is put, hauling speed, traffic direction, rocking arm height, cutting power, pressure fuel pump, fuselage inclination angle, communication and malfunction, each parameter setting values etc.

Scraper system, reductor oil temperature oil level, cooling water pressure, flow, motor axle temperature, three-phase current, voltage etc.

Liquid-supplying system, source water ion content, electrical conductivity, enters back hydraulic pressure difference, concentration of emulsion used, pumping plant outlet pressure, concentration of emulsion used temperature etc.

Video system, adopts 1,4,9 picture display work plane real-time videos.Coal-winning machine video display terminal display coal machine panoramic video.

Communication, protection and fault diagnosis, each communication line on off operating mode instruction of whole system, latch buttons state and instruction, fault location and analysis etc.

Controlling functions

Unit:

A. by work plane video system, by the operation of operating desk remote visualization support, coal-winning machine.

B. the startup of scrapper conveyor, elevating conveyor, crushing engine, shut-down operation, can select whether to carry out interlocking with transportation system miscellaneous equipment as required and control.

C. liquid-supplying system one key automatically start, shut-down operation, to the on off control of unit.

D. emulsion pump, atomizing pump centralized Control.

Interlock:

A. each equipment order automatic start-stop, three machine equipment running status interlockings, guarantee safety.

B. bracket control system obtains coal-winning machine encoder framing signal by CAN, according to coal-winning machine run location and direction, realizes automatically moving frame, auto spraying with machine according to the program of setting.

Data processing, service center

Carry out gathering display at crossheading Surveillance center sub-system uploading data, and select data to be passed to each subsystem as required.Reserve the data-interface with ground maneuvers command centre, ground monitoring system software is provided, adopt C/S model to realize the monitoring of ground monitoring control centre to whole work plane.

Support electrohydraulic control system, ZDYZ electrohydraulic control system adopts the configuration mode of three support installing controller, two latch buttons.The controlling functions of bracket controller is not by the restriction of hardware configuration mode, and manual operation scope is the left side three frame, the right three frame, and operating in groups scope is the left side ten frame, the right ten frame.

Every 3 supports comprise a support control unit, each support control unit comprises bracket controller 1, latch buttons 2, electromagnetic valve driver 3, displacement transducer 3, pressure sensor 6 (two column pressure detecting), obliquity sensor 3, the electric fixturess (1 receiver of remote-control sytem installed by every 6 framves) such as 1 cover video monitoring system and cable connector that the said equipment is linked together.Each parts detail parameters is shown in annex.

Electrohydraulic control system major function

The major function of electrohydraulic control system is the everything controlling support.Control carries out in base of applications.The order controlled is that operator is sent (or automatically being sent by system according to coal winning machine position) by button operation, and the instantaneous value that sensor detects and the various parameters that user is arranged also are the essential condition of control procedure.

(1) with the non-automatic control of button to single support (adjacent frame) action

Operator, at any bracket controller place support, after first a selected left side three is controlled support to the arbitrary support in right three scopes, make controlled support carry out a certain action or some teamwork, just press corresponding operated key on panel.This is the elementary function that system provides.

(2) automatic sequence interlock is implemented to post-move frame-setting prop action of falling of single support (adjacent frame)

Some relevant coherent coordinations are got up to synthesize a composite move by the program of controller continuously, and automatic follow procedure performs.Linking between each one action process and one action and the data coordinating all to detect in real time with the parameter arranged or sensor are for foundation.Fall post, move frame, setting prop three one actions carry out automatic sequences interlock, synthesize a composite move to move centered by frame.Except these three initiatively do except, other actions of associated, as balance jack, lift the action such as the end, side guard board also can with initiatively make cooperation, participate in program.

Method of operating: first selected support, then press starting (beginning) key, namely selected support starts automatic sequence action.Need not continue according to key, action can go on automatically, automatically terminates.

(3) automatically control in groups

" in groups " object namely once controlled is not only single rack, but the action group that adjacent multi rack is formed." automatically " namely only manually need provide order and start, and just automatically carries out without the need to manual intervention ground later.Automatically the action controlled in groups can be certain single action, also can be the teamwork of automatic sequence.

Automatically specific implementation is controlled in groups: take handling frame as benchmark, the support of any amount of continuous adjacent is set to one of certain a certain action in groups to the left or to the right, the a certain action (composite move of one action or automatic sequence interlock) of support brings into operation from the initial frame of this group one end after providing order, by certain program in group automatically by frame transmission, the action of every frame starts automatically, automatic stopping, till the last frame of this group other end completes this action.Perform what action, the position of group, frame number, the direction of transfer position of depending on handling frame of action and the select command keyed on handling frame in groups.Automatically control in groups must first make a series of optimum configurations, establish rules then namely in groups the condition of establishing of control automatically, but need not all arrange at every turn, parameter just resets when changing stored in rear.Systematic difference program for automatically to fall-to move-liter, pushing and sliding, draw and the action such as to slip and provide automatic control function in groups.

Automatically the operating procedure controlled in groups is :-group set direction-starting (beginning) is selected in action (function).

In auto-controll operation process in groups, by stop key, can stop and cancel this to control.

(4) be that the support of foundation controls automatically with coal winning machine position

This is the Premium Features that support controls.First the position determining coal-winning machine is needed, then according to the operating regulation of work plane, when determining that coal-winning machine runs to a certain position, which support should correspondingly perform any action, these operation requirements are compiled to program stored in system, and system is automatically given an order according to the information of coal winning machine position and commanded corresponding bracket controller to complete these operations.The normal movements of support completely automatically carries out.

(5) there is automatic compensation function when unloading at work in pillar

Controller provides the automatic function of an automatic compensation PSA (PositiveSetAutomatic).Column is in support as because of certain reason generation drop of pressure, and when Pressure Drop is to a certain setting value, system can automatically perform setting prop, and ftercompction to authorized pressure, and can perform repeatedly, ensures supporting quality.

(6) support is equipped with automatic spraying system, is independently controlled by electro hydraulic valve, automatically assists coal miner spray before realizing frame.

(7) locking and emergency stop function

For security purpose, when not allowing the support action of work plane somewhere (as because of maintenance or other objects, personnel will work in this position), latch buttons on bracket controller can be operated by the locking of this support, just can recover after only having unlocking operation.The essence of locking forbids that electromagnetic valve driver drives electromagnetic valve.Unaffected for other bracket controllers beyond the support be blocked, still can normally work.When the emergency that may jeopardize safety in production occurs work plane, can press the scram button on any one bracket controller, full face support action stops immediately and all controlling functions are prohibited before suddenly stopping releasing.Locking and emergent stopping must have releasing operation to restore on the spot, remove operation and exactly button are returned to original position.

(8) back timber level of incline monitoring function

Mounted angle sensor on set cap, in order to measure the angle of set cap, by survey data, bracket controller can control the attitude of support.Give a warning when set cap head is too low information, prevents coal-winning machine cut back timber.Set cap left and right directions inclination angle Real-Time Monitoring, carrying out alarm when being greater than limit value, preventing support tilt.

(9) coal winning machine position measuring ability

Coal winning machine position utilizes the rotary encoder being embedded in traction electric machine inside to calculate, and coal-winning machine operation information is exchanged by wired, wireless two kinds of modes and the external world.

For realizing controlling the rigid water hammer of the accurate control of traction electric machine, multiple traction electric machine, frequency converter adopts the vector controlled pattern of speed sensor, rotary encoder is installed in traction motor for coal mining machine inside, and rotary encoder through signals is as the velocity feedback information of traction electric machine.Frequency converter gathers the feedback information of rotary encoder, and provides external Fabric Interface, calculates coal winning machine position for other control units.Coal-winning machine controller calculates the position of coal-winning machine automatically, sends the information such as coal winning machine position and direction by CAN communication to bracket controller, crossheading Surveillance center, realizes support with machine automation.

Two kinds of external transmission methods in position can be selected by program setting, and two kinds of methods are for subsequent use mutually, thus ensure reliably carrying out of coal mining automation.

(10) hydraulic support remotely controlling functional

A. single rack straighforward operation;

B. straighforward operation support is passed transporter in groups, is retracted transporter in groups;

C. current support number, the operational motion selecting operation support of transmitter display screen Real-Time Monitoring;

D. the signal of receiver that is connected with transmitter of transmitter display screen Real-Time Monitoring is strong and weak;

E. transmitter display screen Real-Time Monitoring opereating specification instruction (i.e. transmitter can control hydraulic support);

F. transmitter display screen Real-Time Monitoring operates the column pressure of support and passes stroke;

G. receiver possesses ID Auto-matching function, according to the ID Auto-matching control range that controller sends;

H. real-time communication function: remote control transmitter and receiver of remote-control sytem can overlap at any time, carry out remote pilot;

(11) full face video monitoring function

A. the video monitoring to hydraulic support electrohydraulic control system and other equipment of work plane (coal-winning machine, drag conveyor, elevating conveyor, crushing engine, stacked switch, pumping plant etc.) is realized.

B. 1,4,9 interface display mode of making a video recording can be adopted, in real time display work plane video.

C. can record a video to key position camera video information, be kept at the use for reference of local memory space.

D. the data realized down-hole is taken are sent to ground by Ethernet, can realize the real time on-line monitoring to work plane in ore deposit control centre.

(12) information prompting function

Electrohydraulic control system possesses following a few category information prompt facility: the status information of the alarming sound optical signal of support action, the controling parameters information of setting, fault and error message, inline diagnosis and some systems itself.

(13) data transmission

Realize the real-time display etc. to the remote monitoring of fully-mechanized mining working equipment and various data in crossheading main control computer and ground maneuvers command centre, for underground work is on-the-spot and surface production, administrative staff provide real-time mining face under mine production and security information.

Support self-information uploads to ground by underground data transmission system, and shows on down-hole and aboveground computer, is linked into mine automated system, adopts the OPC agreement of standard to its data format provided.

For solving the pollution problem of emulsion, and the etching problem of fully-mechanized mining equipment, to improve operating efficiency and the application life of combine coal mining unit, have in concrete for hydraulic support:

Colliery pure water hydraulics support, comprises back timber, base, caving shield, front-rear linkage, pusher rod, column, jack and valve group and control system, and the dynamic medium of described hydraulic support is pure water.

Further colliery pure water hydraulics support, column is the anticorrosion column of permutation function with pressure, and jack is the anticorrosion jack of permutation function with pressure, and column is between back timber and base, be provided with hydralic hose in back timber, and hydralic hose is connected with union.

Further, colliery pure water hydraulics support, pure water, through ultrapure water apparatus deionization, can stop metal directly to contact with oxidation material.

Further, colliery pure water hydraulics support, the oil cylinder of column and valve group and union are configured with coating for protection against corrosion.

Further, colliery pure water hydraulics support, is characterized in that, the oil cylinder replacing water medium system with pressure of described column and jack, realizes aqueous medium flowing anticorrosion.

Further, colliery pure water hydraulics support, improves the cylinder bore machining accuracy of column, effectively reduces the intercrystalline corrosion of oil cylinder stress.

Further, colliery pure water hydraulics support, realizes on column and jack, covering micro-nano coating to realize the corrosion protection of Hydraulic Elements by micro-nano coating technology.

Further, colliery pure water hydraulics support, is characterized in that, by adding prefilming agent at column and jack inner surface, realizes carrying out pre-film to static column and jack inner surface anticorrosion.

By being that dynamic medium substitutes emulsion with pure water comprehensively, realizing comprehensively substituting of emulsion, realize the environmental objective of fully mechanized coal face zero water pollution.

The basic reason that corrosion occurs, oxidant is had to exist in environment residing for material, corrode irresistible simultaneously, change environment residing for material, by using the pure water of deionization and draught control corrosion rate can being increased in the mode that inner surface adds prefilming agent, the corrosion resistance of effective raising equipment, to improve application life.

Accompanying drawing explanation

The accompanying drawing forming the application's part is used for providing to further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is hydraulic support of the present utility model.

In figure: 1, back timber, 2, base, 3, caving shield, 4, front-rear linkage, 5, pusher rod, 6, column, 7, jack, 8, hydralic hose, 9, joint.

Detailed description of the invention

And describe the utility model in detail below with reference to the accompanying drawings in conjunction with the embodiments.

As shown in Figure 1, the utility model provides a kind of hydraulic support, comprise back timber 1, base 2, caving shield 3, front-rear linkage 4, pusher rod 5, column 6, jack 7 and valve group and control system, back timber 1 directly contacts with the top board of work plane, and bear the bracket component of balkstone load, caving shield 3 stops that erecting dense individual props spoil does not pour in work plane space, and bear the load of caved gangue, to bear the parts of top board horizontal thrust, base 2 directly contacts with base plate, transmit roof pressure to base plate and bear the bracket component of roof pressure, column 6 is mainly used in the hydraulic cylinder bearing roof toad and regulate supporting height, jack is the various oil cylinders except column, mainly carry out passing drag conveyor, move the adjustment and various protection act etc. of establishing support and support, jack 7 is for protecting jack in side, mainly curb girder is protected.

Preferably, column 6 is the anticorrosion column of permutation function with pressure, and described jack 7 is the anticorrosion jack of permutation function with pressure, and described column 6 is between back timber 1 and base 2, be provided with hydralic hose 8 in back timber 1, and hydralic hose 8 is connected with union 9.

Hydraulic support relies on highly pressurised liquid, column and corresponding power jack can realize rising frame, falls frame, pushing and sliding, moves frame four elemental motions: rise frame and operating valve is placed in " rising frame " position, the highly pressurised liquid transported through pressure hose by pumping plant enters column cavity of resorption by hydraulic control one-way valve; The liquid of upright post upper cavity flow to liquid back pipe by control valve, so the protruding support of column rises; Pushing and sliding, under the state that support is in support, control valve is placed in " pushing and sliding " position, highly pressurised liquid enters the left chamber of advancing jack through control valve; Its right chamber liquid flow to liquid back pipe through control valve.Now, advancing jack piston rod stretches out, and pushes working face conveyor to rib.Pushing distance is generally one of coal-winning machine and cuts dark; Fall frame and control valve is got to " falling frame " position, highly pressurised liquid flows into the epicoele of column through control valve, and opens hydraulic control one-way valve simultaneously; The liquid of column cavity of resorption flow to liquid back pipe after hydraulic control one-way valve, control valve, so column retraction, support height reduces; Move frame, after support unloading (falling frame) or partial relief, control valve is got to " moving frame " position, highly pressurised liquid enters the right chamber of advancing jack; Jack left chamber low pressure liquid flows back to liquid back pipe road, and now jack cylinder body drives support to move to right.

In preferred the present embodiment, realize the action of all hydraulic element as dynamic medium with pure water.

Preferably, pure water, through ultrapure water apparatus deionization, can stop metal directly to contact with oxidation material.

Preferably, pure water hydraulics support, the oil cylinder of column 6 and valve group and union are configured with coating for protection against corrosion.

Preferably, pure water hydraulics support, the oil cylinder replacing water medium system with pressure of described column 6 and jack 7, realizes aqueous medium flowing anticorrosion.

Preferably, pure water hydraulics support, improves the cylinder bore machining accuracy of column 6, effectively reduces stress intercrystalline corrosion.

Preferably, pure water hydraulics support, realizes on column 6 and jack 7, covering micro-nano coating to realize the corrosion protection of Hydraulic Elements by micro-nano coating technology.

Preferably, pure water hydraulics support, by adding prefilming agent at column 6 and jack 7 inner surface, realizes carrying out pre-film to static column (6) and jack 7 inner surface anticorrosion.

These are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (8)

1. a colliery pure water hydraulics support, comprise back timber (1), base (2), caving shield (3), front-rear linkage (4), pusher rod (5), column (6), jack (7) and valve group and control system, its central post (6) is arranged between back timber (1) and base (2), jack (7) is arranged between back timber (1) and caving shield (3), it is characterized in that, the dynamic medium of described hydraulic support is pure water.

2. colliery according to claim 1 pure water hydraulics support, it is characterized in that, the anticorrosion column that described column (6) is permutation function with pressure, the anticorrosion jack that described jack (7) is permutation function with pressure, and described column (6) is positioned between back timber (1) and base (2), be provided with hydralic hose (8) in back timber (1), and hydralic hose (8) is connected with union (9).

3. colliery according to claim 1 pure water hydraulics support, is characterized in that, described pure water, through ultrapure water apparatus deionization, can stop metal directly to contact with oxidation material.

4. colliery according to claim 2 pure water hydraulics support, is characterized in that, the oil cylinder of described column (6) and valve group and union are configured with coating for protection against corrosion.

5. colliery according to claim 4 pure water hydraulics support, is characterized in that, the oil cylinder replacing water medium system with pressure of described column (6) and jack (7), realizes aqueous medium flowing anticorrosion.

6. colliery according to claim 2 pure water hydraulics support, is characterized in that, improves the cylinder bore machining accuracy of column (6), effectively reduces the intercrystalline corrosion of oil cylinder stress.

7. colliery according to claim 5 pure water hydraulics support, is characterized in that, realizes above covering micro-nano coating to realize the corrosion protection of Hydraulic Elements at column (6) and jack (7) by micro-nano coating technology.

8. colliery according to claim 7 pure water hydraulics support, it is characterized in that, by adding prefilming agent at column (6) and jack (7) inner surface, realize that pre-film carries out to static column (6) and jack (7) inner surface anticorrosion.