CN108612549A - A kind of buffer system pressed for hydraulic support shock resistance and its application - Google Patents
A kind of buffer system pressed for hydraulic support shock resistance and its application Download PDFInfo
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- CN108612549A CN108612549A CN201810772399.3A CN201810772399A CN108612549A CN 108612549 A CN108612549 A CN 108612549A CN 201810772399 A CN201810772399 A CN 201810772399A CN 108612549 A CN108612549 A CN 108612549A
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- 230000035939 shock Effects 0.000 title claims abstract description 85
- 239000007853 buffer solution Substances 0.000 title claims abstract description 34
- 239000000872 buffer Substances 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000003139 buffering effect Effects 0.000 claims abstract description 15
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 29
- 238000013016 damping Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000000518 rheometry Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 2
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010008469 Chest discomfort Diseases 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000010210 aluminium Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
- E21D15/445—Hydraulic, pneumatic, or hydraulic-pneumatic props comprising a fluid cushion
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/46—Telescopic props with load-measuring devices; with alarm devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention relates to a kind of buffer system pressed for hydraulic support shock resistance and its applications, including column, column includes sequentially connected movable post, middle part oil cylinder, bottom oil cylinder and shock resistance buffer, the pressure sensor and controller being connected are provided on shock resistance buffer, controller is also electrically connected with the magnetic current type transformer coil in shock resistance buffer；Pressure information is acquired by pressure sensor, is adjusted in real time by controller and the electric current of break-make magnetic current type transformer coil, the bump for making shock resistance buffer that buffering upright be assisted to be subject to.The buffer system pressed to shock resistance of the present invention can be readily integrated on existing hydraulic rack structure, and installation is facilitated to be matched with existing hydraulic support.The single mode that tradition relies on high-flow safety valve pressure release is changed, using reliability when capableing of the buffering pressure leak process of effective protection column after the buffer system, while pressing with promoting hydraulic support shock resistance, ensures that hydraulic support safely and effectively works.
Description
Technical field
The present invention relates to a kind of buffer system pressed for hydraulic support shock resistance and its applications, belong to mine support skill
Art field.
Background technology
With the increase of exploitation of coal resources depth and mining rate, the dynamic disasters such as Rock Burst increasingly sharpen,
Seriously threaten the safety of coal mining.Bump refers to roadway or working face surrounding rock body, due to elastic deformation energy
Instantaneous relase and generate the dynamic phenomenon that acutely destroys suddenly, be often accompanied by coal and rock dish out, loud noise and phenomena such as blast.
Statistical analysis shows the report that various types of mines have bump to occur, and all kinds of coal seams all overshoot
Hit phenomenon, geological structure from simple to complexity, coal seam from thin to special thick, inclination angle from level to high-dipping, conglomerate, sandstone, limestone,
Oil shale top plate is pressed overbump all occurs.Not only the extent of injury is big for coal mine rock burst, influence it is wide, and be induce its
The root of its coal mine major accident.The generation of bump may induce the particularly serious disaster such as outburst coal mass, gas explosion.
The problem of seriously affecting Safety of Coal Mine Production for reply bump, many schemes that technical staff proposes substantially may be used
To be divided into active and two kinds of passive type：
Active scheme is used carries out pretreated measure to top plate, brings it about controllable spontaneous caving, prevents coal
Top plate is caving the impact of generation and is damaged to equipment and operating personnel mine suddenly during normal production.It is broken for face roof
Have and is caving dangerous region often using active scheme.
Due to the uncertainty that bump occurs, proactive cannot control the generation of bump completely.Therefore
It is good for roof condition, it is not easy to find the working face of bump tendency, often uses passive type scheme.Passive type method master
If being buffered using the pressure release of the support apparatus such as hydraulic support to reduce bump damage.For the hydraulic pressure in passive type method
For bracket support, current main solution：
(1) mine hydraulic bracket generally solves shock problem using high-flow safety valve is installed additional inside column at present,
By high-flow safety valve, the mode of off-load prevents bump from being caused brokenly to holder and pillar construction after more than setting pressure
It is bad；(2) patent (CN105134260B) proposes to solve shock problem using the thinking for cylinder increase-volume of rising, and increase-volume buffers strength anti-impact
It hits double-telescopic upright post and is divided into air chamber increase-volume strength shock resistance double-telescopic upright post and the increase-volume strength shock resistance double-telescopic upright post that rises,
Its hollow gas chamber increase-volume double-telescopic upright post is setting empty room gas-liquid strut device, middle cylinder after being hit using column inside movable post
Air chamber inside pressure increase compression movable post buffers to realize；The increase-volume double-telescopic upright post that rises is that the cylinder that rises is arranged inside movable post
Structure realizes buffering by the flexible deformation for the cylinder that rises.(3) high-speed energy absorption anti-impact retreat hydraulic support for coal mine (patent No.
CN201110363855.7 energy-absorbing impact-proof structure (more sky foamed aluminiums, polyurethane mainly) are additionally arranged at the bottom in hydraulic support column
Class material, rubber material etc.) it is buffered to absorb impact energy realization.
There are still problems with not yet to solve for above method：
1, holder can not carry out active adjusting and reply according to bump to press earthquake intensity and intensity.
2, influence is caused on original holder and pillar construction in column ontology reload buffer structure, increases manufacture work
Skill complexity and production cost；
3, huge surge is often generated when bump occurs, for installing high-flow safety valve additional inside column
Mode for, high-flow safety valve needs to discharge a large amount of fluid to uninstall this part surge.Since bump is made
Very short with the time, bump process duration only continued several milliseconds when shock loading maximum and arrives at several seconds to tens seconds
A few tens of milliseconds, high-flow safety valve can not timely respond to during often leading to bump from occurring end, therefore make
The appearance of the problems such as at column bending, fracture, detonation, has seriously affected production safety.
Therefore a kind of buffer system (hereinafter referred to as hydraulic support pressed for hydraulic support shock resistance proposed by the present invention
Shock resistance system) it just focuses on solving surge pressure excessively high timely buffering off-load when bump occurs and is actively adjusted according to press
The problem of saving buffer damping.This method can effectively solve the problems, such as such shock resistance, improve the speed and actual effect of column response,
Facilitate application and replacement simultaneously.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of buffer system pressed for hydraulic support shock resistance.
The present invention also provides a kind of above-mentioned working methods for the buffer system pressed for hydraulic support shock resistance.
Technical scheme is as follows：
A kind of buffer system pressed for hydraulic support shock resistance, including column, column include sequentially connected movable post,
Middle part oil cylinder, bottom oil cylinder and shock resistance buffer are provided with the pressure sensor being connected and control on shock resistance buffer
Device, controller are also electrically connected with the magnetic current type transformer coil in shock resistance buffer；Pressure information is acquired by pressure sensor, by controlling
Device processed adjusts in real time and the electric current of break-make magnetic current type transformer coil, the bump for making shock resistance buffer auxiliary buffering upright be subject to.
Preferably, the shock resistance buffer includes sequentially connected portable pillar, top oil cylinder, flameproof enclosure and lower part oil
Cylinder；Connector is provided in flameproof enclosure, connector is wound with described for connecting top oil cylinder and lower part oil cylinder on connector
Magnetic current type transformer coil and connector axial direction on be through with multiple damping holes.
Preferably, the movable top end is equipped with concave support base, and concave support base and the cylinder barrel of bottom oil cylinder rigidly connect
It connects.
Preferably, the top oil cylinder includes epicoele cylinder body, epicoele piston and upper cavity end cap, the bottom of epicoele cylinder body and company
Junctor upper end connects, and epicoele piston is located in epicoele cylinder body and is encapsulated by upper cavity end cap, portable pillar run through upper cavity end cap with it is upper
Chamber piston connects, and pressure sensor is installed on the bottom of epicoele cylinder body, liquid injection port is further opened on epicoele cylinder body.
Preferably, the lower part oil cylinder includes cavity of resorption cylinder body, cavity of resorption piston, spring and pedestal, the top of cavity of resorption cylinder body with
Connector lower end connects, and cavity of resorption piston, spring are sequentially loaded into cavity of resorption cylinder body and are encapsulated by pedestal.
Preferably, the bottom of the epicoele cylinder body and connector upper end junction, cavity of resorption cylinder body top and connector under
End junction is separately installed with sealing ring.
Preferably, the shape of the pedestal is hemispherical.This design is advantageous in that, pedestal is designed to and traditional column
Similar spherical structure, it is convenient to be connect with the needling of hydraulic support foundation.
Preferably, helicla flute is offered on the connector, the magnetic current type transformer coil is wrapped in connector along helicla flute
On.
A kind of hydraulic support, including top beam, pedestal and above-mentioned buffer system, the column be located at top beam and pedestal it
Between, movable post is connect with top beam, and the pedestal of shock resistance buffer and the pedestal of hydraulic support connect.
A kind of working method for the buffer system pressed for hydraulic support shock resistance, includes the following steps：
(1) column in this buffer system is substituted traditional column to be mounted on hydraulic support, wherein movable post connects with top beam
It connects, the pedestal of shock resistance buffer and the pedestal of hydraulic support connect, and pressure sensor and controller are separately connected external power supply；
(2) when the top beam of hydraulic support bump, column occurs by shock loading, top beam moves down, pressure sensing
Device collects pressure signal and is transferred to controller, and controller adjusts in real time and the electric current of break-make magnetic current type transformer coil, keeps shock resistance slow
It rushes device and generates damping force, realize cushioning effect；
(3) when shock resistance buffer depletion impact energy so that the high-flow safety valve of hydraulic support column has enough
Time opens pressure release, subsequently discharges remaining impact energy by high-flow safety valve.
The beneficial effects of the present invention are：
1. magnetic current type transformer coil is arranged in outside damp channel and is isolated from the outside by flameproof enclosure in buffer system of the present invention, beat
Magnetic current type transformer coil can be operated by opening flameproof enclosure, be convenient for changing and repaired.Controller uses dynamic regulation strategy, in buffering course
Hydraulic support shock resistance system damping power is adjusted in real time, actively increases the pressure amount that allows when buffer cavity pressure is excessively high, improves buffering
Performance.
2. improved hydraulic support uses series buffer thinking, can basis for the hydraulic support used under different operating modes
The surge pressure and maximum output current parameter of its working environment initialization system controller, control coil electric current is thus to hydraulic pressure branch
Frame shock resistance system provides corresponding damping force, so that buffer system is applied more flexible, and buffering course is more steady, reliable.
Surge pressure parameter is added in the controller simultaneously, when surge is more than hydraulic support shock resistance system peak pressure
When power, the power-off of controller control coil makes buffer quick pressure releasing protective cradle column, response speed be better than big flow safety again
Valve.
3. the buffer system pressed to shock resistance of the present invention can be readily integrated on existing hydraulic rack structure, facilitate peace
Dress is matched with existing hydraulic support.The single mode that tradition relies on high-flow safety valve pressure release is changed, using the buffering
Reliability when capableing of the buffering pressure leak process of effective protection column after system, while pressing with promoting hydraulic support shock resistance is protected
Barrier hydraulic support safely and effectively works.
Description of the drawings
Fig. 1 is the overall structure diagram of buffer system of the present invention；
Fig. 2 is the structural schematic diagram of moderate resistance shock eliminator of the present invention；
Fig. 3 is the sectional view of moderate resistance shock eliminator of the present invention；
Fig. 4 is buffer system top cylinder structure schematic diagram of the present invention；
Fig. 5 is damp channel structure chart in the present invention；
Fig. 6 is buffer system lower part cylinder structure schematic diagram of the present invention；
Wherein：1, movable post；2, middle part oil cylinder；3, bottom oil cylinder；4, shock resistance buffer；401, portable pillar；402, top
Oil cylinder；403, flameproof enclosure；404, lower part oil cylinder；405, sealing ring；406, spring；407, upper cavity end cap；408, liquid injection port；
409, sealing ring；4010, magnetic current type transformer coil；4011, damping hole；4012, cavity of resorption cylinder body；4013, cavity of resorption piston；4014, pedestal；
4015, connector；4016, epicoele cylinder body；4017, cavity of resorption end cap；5, pressure sensor；6, controller；7, damp channel.
Specific implementation mode
The present invention will be further described by way of example and in conjunction with the accompanying drawings, but not limited to this.
Embodiment 1：
As shown in Figures 1 to 6, the present embodiment provides a kind of buffer systems pressed for hydraulic support shock resistance, this is slow
Flushing system includes mainly modified column, and column includes from top to bottom sequentially connected movable post 1, middle part oil cylinder 2, bottom oil cylinder 3
With shock resistance buffer 4, be provided with the pressure sensor 5 being connected and controller 6 on shock resistance buffer 4, controller 6 also with
Magnetic current type transformer coil electrical connection in shock resistance buffer 4；Pressure information is acquired by pressure sensor 5, is adjusted in real time by controller 6
The electric current of section and break-make magnetic current type transformer coil, the bump for making shock resistance buffer 4 that buffering upright be assisted to be subject to.
Technical solution provided in this embodiment, in the single side pressed by high-flow safety valve shock absorbing of column tradition
Under formula, by adding intelligentized control method shock resistance buffer in column bottom end, it is combined, can ensures vertical with high-flow safety valve
Column fast and effeciently pressure release when by bump avoids column buffering pressure release from causing damage situations not in time.
Wherein, the primary structure of shock resistance buffer includes from top to bottom sequentially connected portable pillar 401, top oil cylinder
402, flameproof enclosure 403 and lower part oil cylinder 404；Connector 4015 is provided in flameproof enclosure 403, connector 4015 is for connecting
Top oil cylinder 402 and lower part oil cylinder 404 are wound on connector 4015 in the magnetic current type transformer coil 4010 and connector axial direction
There are four damping hole 4011, four damping holes 4011 constitute connection top oil cylinder (oil pocket) and lower part oil cylinder (oil for perforation
Chamber) damp channel 7.
401 top of portable pillar is designed specifically to concave support base, and concave support base and the cylinder barrel of bottom oil cylinder 3 rigidly connect
It connects.Hydraulic support column is that the spherical of column lower part and the spherical at holder needling fit when being assembled with pedestal, from
And bracket base is made to achieve the purpose that carry column.When setting prop or drop column, column occurs opposite holder with bracket base
With column bottom spherical dry friction occurs for movement, holder needling.So installing the designed buffering of invention additional to reduce as far as possible
To the influence of holder overall structure and pillar construction after device, buffer movable post column cap be designed to it is consistent with holder needling structure, i.e.,
It is spherical (such as Fig. 2, shown in 401 structures), it is also consistent with column and bracket base assembly when column is assembled with buffer,
I.e. column bottom spherical is combined with buffer movable post column cap spherical, and dry friction occurs for when relative motion.Ensure support force
Prolong shock resistance system axis with impact force to transmit, prevents that situations such as askew, pressure is inclined is pressed to influence hydraulic support normal work.
Top oil cylinder 402 includes epicoele cylinder body 4016, epicoele piston and upper cavity end cap 407, the bottom of epicoele cylinder body 4016
It is connect with 4015 upper end of connector, epicoele piston is located in epicoele cylinder body 4016 and is encapsulated by upper cavity end cap 407, portable pillar
401 connect through upper cavity end cap 407 with epicoele piston, and pressure sensor 5 is installed in the pilot hole of the bottom of epicoele cylinder body 4016
And be connected with controller 6 and external power supply, liquid injection port 408 is further opened on epicoele cylinder body 4016.
Lower part oil cylinder 404 includes cavity of resorption cylinder body 4012, cavity of resorption piston 4013, spring 406 and pedestal 4014, cavity of resorption cylinder body
4012 top is connect with 4015 lower end of connector, and cavity of resorption piston 4013, spring 406 are sequentially loaded into cavity of resorption cylinder body and pass through bottom
Seat 4014 encapsulates.The shape of pedestal 4014 is hemispherical, and pedestal is designed to spherical structure similar with traditional column, it is convenient and
The needling of hydraulic support foundation connects.
In addition, the bottom of epicoele cylinder body 4016 and 4015 upper end junction of connector, the top of cavity of resorption cylinder body 4012 and company
4015 lower end junction of junctor is separately installed with sealing ring 409,405.
Helicla flute is offered on connector 4015, magnetic current type transformer coil 4010 is wrapped in along helicla flute on connector 4015.Control
Device 6 processed is electrically connected with magnetic current type transformer coil 4010, and the electric current by adjusting and controlling magnetic current type transformer coil 4010 in real time realizes shock resistance
The operation of buffer.
The operation principle of the present embodiment buffer system：
1, system parameter settings (including the setting of controller current parameters and pressure sensor surge pressure parameter setting)
(1) controller current parameters are set
Controller is fixed on buffer cylinder barrel outer wall, to magnetic after the pressure signal that pressure sensor acquires is compared
Rheology coil inputs electric current of corresponding size.
This size of current is determined according to being：
On the one hand, the damping force that buffer provides under the operation of this electric current must be more than or equal to hydraulic support column and work normally
When working resistance, with this ensure hydraulic support normal work when shock resistance system do not act.
On the other hand, when pressure sensor detects that pressure increases, signal is passed to controller by pressure sensor, control
Device processed adjusts current value in real time makes buffer rigidity be less than column rigidity, prevents column to be crushed bad.
(2) controller surge pressure parameter setting
When setting pressure sensor surge pressure, it is adjusted according to hydraulic support column maximum operation resistance, it is ensured that
When bump occurs, hydraulic support shock resistance system is corresponding rapidly, is acted prior to hydraulic support column high-flow safety valve.
2, hydraulic support shock resistance system control strategy (program setting in controller)
Controller is passed using adjusting plus on-off control strategy in real time, pressure in hydraulic support shock resistance system work process
The buffer upper cavity pressure measured is transferred to controller by sensor, controller by it with setting without bump when buffer on
Cavity pressure maximum value is compared.
If buffer upper cavity pressure maximum value is P1 when no bump, the buffer upper cavity pressure value measured in real time is
P2, the surge pressure that controller is set is Pm.
Work as P1=P2<When Pm, controller controls power supply and exports normal current to magnetic current type transformer coil；
Work as P1<P2<When Pm, the electric current that controller control power supply is exported to magnetic current type transformer coil accordingly reduces；
Work as P1<Pm<When P2, controller controls magnetorheological coil blackout, so that magnetorheological fluid is restored to Newtonian fluid state fast
Speed reduces upper cavity pressure by damp channel, to make buffer acquisition is larger pressure amount is allowed to reduce impact peak value pressure, makes buffering
Process is more steady.
3, hydraulic support shock resistance system work process (action process when pressing to entire column shock resistance)
(1) when column is not affected by shock loading, shock resistance buffer activity column is under the action of cavity of resorption spring in top
The state of liter.Power on and power to coil electrifying system, upper cavity pressure is less than the surge pressure of setting, controller control electricity at this time
Source provides corresponding damping force to coil power supply, buffer for buffer system, makes buffer that there is certain rigidity to ensure hydraulic support
It works normally unaffected.
(2) when column is by shock loading, according to load condition, reduced by controller or deenergization gives coil electricity
Stream, impact energy are transmitted to via hydraulic support column on shock resistance buffer, and epicoele magnetorheological fluid is made by portable pillar pushing
Chamber becomes high pressure chest, and magnetorheological fluid compression force effect flows into cavity of resorption through damp channel by epicoele, realizes cushioning effect so that hydraulic pressure
The high-flow safety valve of bracket upright post installation has enough time to open pressure release, discharges remaining impact energy.Entire buffered
Since buffer rigidity is less than hydraulic support column rigidity in journey, so buffer can pacify prior to column big flow when impact occurs
Full valve acts.Pressure amount is allowed also to be not enough to dissipate impact energy so that hydraulic support column cavity pressure increases when buffer
When, the high-flow safety valve of column opens pressure release.
(3) top plate has certain amount of moving down after bump process, and will not restore.
Embodiment 2：
A kind of hydraulic support, including top beam, pedestal and buffer system described in embodiment 1, by the modified of embodiment 1
Column is installed between top beam and pedestal, and movable post 1 is connect with top beam, the bottom of the pedestal 4014 and hydraulic support of shock resistance buffer
Seat connection.
Embodiment 3：
The working method for the buffer system pressed as described in Example 1 for hydraulic support shock resistance, specific works mistake
Journey includes the following steps：
(1) column in 1 buffer system of embodiment traditional column is substituted to be mounted on hydraulic support, wherein movable post 1 with
Top beam connects, and the pedestal 4014 of shock resistance buffer is connect with the pedestal of hydraulic support, and pressure sensor 5 and controller 6 also divide
External power supply is not connected；
(2) when the top plate of hydraulic support bump, column occurs by shock loading, set cap moves down, pressure
Sensor 5 collects pressure signal and is transferred to controller 6, and controller 6 adjusts in real time and the electric current of break-make magnetic current type transformer coil, makes to resist
Shock eliminator generates damping force, prior to high-flow safety valve operation, realizes cushioning effect；
(3) when shock resistance buffer depletion impact energy so that the high-flow safety valve of hydraulic support column has enough
Time opens pressure release, subsequently discharges remaining impact energy (when what is fallen more than shock resistance buffer depletion by shock resistance buffer
After maximum impact energy, remaining impact energy is then fallen by high-flow safety valve pressure release, and shock resistance buffer is big flow safety
Time enough has been striven in the response of valve).
After bump process, top beam has certain amount of moving down and will not reply, therefore bump process knot
Shu Houxu reduces hydraulic support shock resistance system altitude, disconnects shock resistance buffer power supply, and magnetorheological fluid is restored to newton at this time
Fluid state, in shock resistance buffer lower part under the action of oil cylinder inner spring, the magnetorheological fluid of cavity of resorption, which will be pushed through epicoele, to be delayed
Compressed movable post ejects completely during punching, completes the reset of shock resistance buffer.
Claims (10)
1. a kind of buffer system pressed for hydraulic support shock resistance, which is characterized in that including column, column includes connecting successively
Movable post, middle part oil cylinder, bottom oil cylinder and the shock resistance buffer connect is provided with the pressure sensing being connected on shock resistance buffer
Device and controller, controller are also electrically connected with the magnetic current type transformer coil in shock resistance buffer；Pressure is acquired by pressure sensor
Information, is adjusted and the electric current of break-make magnetic current type transformer coil in real time by controller, and shock resistance buffer auxiliary buffering upright is made to be subject to
Bump.
2. buffer system as described in claim 1, which is characterized in that the shock resistance buffer includes sequentially connected activity
Column, top oil cylinder, flameproof enclosure and lower part oil cylinder；Connector is provided in flameproof enclosure, connector is for connecting top oil cylinder
With lower part oil cylinder, it is wound on connector in the magnetic current type transformer coil and connector axial direction and is through with multiple damping holes.
3. buffer system as claimed in claim 2, which is characterized in that the activity top end is equipped with concave support base, concave
The cylinder barrel of support base and bottom oil cylinder is rigidly connected.
4. buffer system as claimed in claim 2, which is characterized in that the top oil cylinder includes epicoele cylinder body, epicoele piston
And upper cavity end cap, the bottom of epicoele cylinder body are connect with connector upper end, epicoele piston is located in epicoele cylinder body and passes through epicoele end
Lid encapsulation, portable pillar are connect through upper cavity end cap with epicoele piston, and pressure sensor is installed on the bottom of epicoele cylinder body, epicoele cylinder
Liquid injection port is further opened on body.
5. buffer system as claimed in claim 4, which is characterized in that the lower part oil cylinder include cavity of resorption cylinder body, cavity of resorption piston,
The top of spring and pedestal, cavity of resorption cylinder body is connect with connector lower end, and cavity of resorption piston, spring are sequentially loaded into cavity of resorption cylinder body and lead to
Cross pedestal encapsulation.
6. buffer system as claimed in claim 5, which is characterized in that the bottom of the epicoele cylinder body is connect with connector upper end
Place, the top of cavity of resorption cylinder body and connector lower end junction are separately installed with sealing ring.
7. buffer system as claimed in claim 5, which is characterized in that the shape of the pedestal is hemispherical.
8. buffer system as claimed in claim 2, which is characterized in that offer helicla flute, the magnetic on the connector
Rheology coil is wrapped in along helicla flute on connector.
9. a kind of hydraulic support, including top beam, pedestal and claim 1-8 any one of them buffer systems, the column
Between top beam and pedestal, movable post is connect with top beam, and the pedestal of shock resistance buffer and the pedestal of hydraulic support connect.
10. a kind of work side for the buffer system pressed for hydraulic support shock resistance such as claim 1-8 any one of them
Method includes the following steps：
(1) column in this buffer system is substituted traditional column to be mounted on hydraulic support, wherein movable post is connect with top beam, is resisted
The pedestal of shock eliminator and the pedestal of hydraulic support connect, and pressure sensor and controller are separately connected external power supply；
(2) when the top beam of hydraulic support bump, column occurs by shock loading, top beam moves down, and pressure sensor is adopted
Collect pressure signal and be transferred to controller, controller adjusts in real time and the electric current of break-make magnetic current type transformer coil, makes shock resistance buffer
Damping force is generated, realizes cushioning effect；
(3) when shock resistance buffer depletion impact energy so that the high-flow safety valve of hydraulic support column has enough time
Pressure release is opened, remaining impact energy is subsequently discharged by high-flow safety valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810772399.3A CN108612549B (en) | 2018-07-13 | 2018-07-13 | Buffer system for hydraulic support to resist impact and pressure and application thereof |
| PCT/CN2019/089090 WO2019192627A1 (en) | 2018-07-13 | 2019-05-29 | Buffer system for hydraulic support impact ground pressure resistance, and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810772399.3A CN108612549B (en) | 2018-07-13 | 2018-07-13 | Buffer system for hydraulic support to resist impact and pressure and application thereof |
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| CN108612549A true CN108612549A (en) | 2018-10-02 |
| CN108612549B CN108612549B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810772399.3A Active CN108612549B (en) | 2018-07-13 | 2018-07-13 | Buffer system for hydraulic support to resist impact and pressure and application thereof |
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| Country | Link |
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| CN (1) | CN108612549B (en) |
| WO (1) | WO2019192627A1 (en) |
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| CN109707678A (en) * | 2018-12-28 | 2019-05-03 | 北京天地玛珂电液控制系统有限公司 | Pressurized cylinder, hydraulic shock test macro and method |
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| CN110284912A (en) * | 2019-07-20 | 2019-09-27 | 山西能源学院 | A kind of hydraulic prop for mine is from gravity pressure relief buffering mechanism |
| WO2019192627A1 (en) * | 2018-07-13 | 2019-10-10 | 山东科技大学 | Buffer system for hydraulic support impact ground pressure resistance, and application thereof |
| WO2021115025A1 (en) * | 2019-12-10 | 2021-06-17 | 新昌县陆恒机械有限公司 | Suspended unit hydraulic apparatus for mining |
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Also Published As
| Publication number | Publication date |
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| CN108612549B (en) | 2023-10-24 |
| WO2019192627A1 (en) | 2019-10-10 |
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