CN104612736B - It is provided with the coal mining support of cross support bar - Google Patents
It is provided with the coal mining support of cross support bar Download PDFInfo
- Publication number
- CN104612736B CN104612736B CN201510033325.4A CN201510033325A CN104612736B CN 104612736 B CN104612736 B CN 104612736B CN 201510033325 A CN201510033325 A CN 201510033325A CN 104612736 B CN104612736 B CN 104612736B
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- CN
- China
- Prior art keywords
- base plate
- back timber
- support
- support bar
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The present invention relates to a kind of coal mining support for being provided with cross support bar, the support is provided with back timber and base plate, supporting top beam is provided with base plate, and brake the hydraulic prop of back timber raising and lowering, the hydraulic prop is provided with four, it is vertically fixed on base plate, the hydraulic haulage bar for pulling support reach is provided with base plate；It is characterized in that：Firm back timber is provided with base plate, the support bar of the parallel lifting of back timber is made, the support bar is chi structure, two bars are one group, and centre is provided with connecting shaft, and the cross support bar is arranged on base plate left and right sides, four strong points of the top and bottom of cross support bar, are divided into two groups：It is the two front support points in longitudinal direction and two rear support points respectively, in forward and backward two groups of strong points, one group is linked with the edge of back timber and base plate respectively by movable axis, and another group is slidably connected with top board and base plate by slide unit.The present invention is applied to coal mining and other mining supports, and support effect is good, and efficiency high, material-saving are easy to ship and are safeguarded.
Description
Technical field
The present invention relates to a kind of a kind of support meanss of down-hole coal excavation operation, specifically a kind of intersection of employing new structure
The coal mining support of support bar, the support are applied to various coal mining activities, are also applied for the support of the excavation work of other mines.
Background technology
Support apparatus are the capital equipments used in coal work, and it will realize firm to the top in coal face and tunnel
Support, also oneself will move ahead.Its Main Function be make coal mining field personnel have one it is safe and reliable, be easy to coal mining activity
Work space.Its function and quality directly affect the life security of coal miner, also substantial connection the efficiency mined and
Quality, is also related to the safety of whole mine, is a kind of vital safety and operation equipment of coal work.Existing support
Equipment typically divides following several：Wooden prop, metal friction pillar, hydraulic prop, split cantilever support, entire combination are suspended
A few big class such as support, comprehensive mining hydraulic bracket, standing support, shield, chock shield.Wooden prop, metal rub
Wiping pillar and hydraulic prop needs a dead lift in use, and labor strength is big, and mobility is excessively poor, is adopted
Coal work surface is phased out, presently mainly used in underworkings local.Suspended class support, including split cantilever support and entirety
Sectional shelf-unit is mainly used in middle and small scale coal mine, and working resistance is less, and loaded down with trivial details due to moving frame action, its work efficiency is very low.Fully mechanized mining
In terms of safety enabling capabilities and work efficiency, two class support apparatus all improve a lot support earlier above.But due to its center
Adopt the quadric chain of single wobbling pole or double swing-bar more structure, make fully mechanized mining supporter during support, particularly set cap exists
After contact rock or coal top board, support rises in camber line, and back timber is with respect to top board friction displacement, the interphase interaction of internal structure
Working resistance is produced, useful work is consumed, while destruction is produced to support itself mechanism, causes existing hydraulic rack structure heavy,
All more than 10 tons, heavy support deadweight is up to 30-50 to its light-duty fully mechanized mining supporter monomer weight.Fully mechanized mining supporter structure is thick
It is strong, heavy.Cause support works heavy, supporting efficiency is low, and equipment cost is very high.Hence it is highly desirable to existing
Support equipment carries out technological improvement, the back timber support meanss of a kind of brand new used in existing support, in making coal work
Support equipment -- support is safer, and cost is reduced, to meet the needs of coal work development.
Utility model content
The invention aims to solve above-mentioned technical problem, a kind of coal mining support for being provided with cross support bar is proposed,
Structure of the support using cross support bar, carries out the support of lifting process for the back timber to support and consolidates, instead of biography
The double leval jib supporting construction of the fully mechanized mining supporter of system, when making hydraulic prop lifting promote back timber to lift, whole back timber all-the-time stable ground
Holding level, eliminates traditional double leval jib supporting top beam camber line and rises the idle work resistance for producing, so as to greatly reduce liquid
The resistance that pressure pillar rises, substantially increases efficiency, and the position of back timber more can guarantee that steady and position accurately, so that
Under the conditions of identical function, weight reducing mitigates weight to hydraulic prop significantly.
The present invention is employed the following technical solutions
The coal mining support of cross support bar is provided with, back timber and base plate is provided with, supporting top beam is provided with base plate, and is braked
The hydraulic prop of back timber raising and lowering, the hydraulic prop are provided with four, are vertically fixed on base plate, and pulling is provided with base plate
The hydraulic haulage bar of support reach；It is characterized in that：Firm back timber is provided with base plate, the support bar of the parallel lifting of back timber is made,
The support bar is chi structure, and two bars are one group, and centre is provided with connecting shaft, and the cross support bar is arranged on the base plate left and right sides
Side, four strong points of the top and bottom of cross support bar, is divided into two groups：The two front support points in longitudinal direction and two rear supports
Point, in forward and backward two groups of strong points, one group is linked with the edge of back timber and base plate respectively by movable axis, and another group by sliding
Dynamic component is slidably connected with top board and base plate.
The present invention is further improved and the additional project of enforcement is：
The cross support bar for being arranged on base plate both sides, the cross support bar per side are mutual between one group or array
The metallic rod of hinge joint is constituted, and each group is that the middle axle that sets intersects two metallic rods being flexibly connected.
The slide unit of the cross support bar and back timber and base plate slidable connection, is by being located on back timber and base plate
Slide rail is constituted with the slide plate or roller that are arranged on supporting bar top.
Rechargeable battery and emergency light are provided with back timber.
No gas concentration monitoring device, gas density display and the exceeded alarm of gas density on back timber, and and ore deposit
The upper and lower signal transmission system of well carries out signal connection.
The photographic head in alignment work face is provided with back timber, the photographic head carries out signal with the upper and lower signal transmission system of mine
Connection.
Support of mines GPS locator is provided with back timber, the localizer is located by connecting with mining area GPS positioning system.
Above-mentioned functions part：Rechargeable battery, emergency light, gas concentration monitoring device, gas density display, gas are dense
The setting for spending exceeded alarm, photographic head and support of mines GPS locator is not simply to abandon to beat or heap structure set, between them
The circuit of shared circuit board and harmony design is provided with, and PLC is provided with, the PLC and above-mentioned each work(
Energy part carries out signal and control connection；And the signal inlet and outlet connectors that PLC is controlled are provided with, it is additionally provided with and the upper and lower signal transmission of mine
System carries out the transmission of wireless signals interface of signal exchange, and the central monitoring computer with the setting of mine upper ground surface and display are big
Screen carries out wireless signal connection.
The upper end that the cross support bar is connected with back timber is plugged on telescopic activity in interleaving support bar for lower end
Connection end.
The upper end that the cross support bar is connected with back timber is to be plugged on telescopic flexible connection in interleaving support bar
Termination.
The axis hole of the connecting shaft in the middle of the cross support bar is elongated hole, and connecting shaft can slide in hole, the long axis hole
Two support bars can be caused to keep at various height, so as to it is also possible that back timber keeps at various height.
The invention is provided with the bracing frame of cross support bar is suitable for using in coal-face, using process：
Support：The hydraulic prop of support rises first, and the back timber of support is horizontal in the stably holding of cross support bar
Under the support of state, level rises, and pillar reaches setting load, the lithosphere above support or coal layer top board are effectively propped up
Support.Because the upper strong point of the cross support bar of the support of the present invention is rubbing with the connection of back timber, back timber can not only protected
Water holding is put down, and makes pillar reach 100% to top plate supporting efficiency.Staggered form stabilizing mechanism again can be one simultaneously
Determine scope intrinsic deflection, the adaptability of top board is strengthened.So that hydraulic prop is carried out more effectively to back timber
Support, do not damage support.After having supported back timber, workman opens coal-winning machine, carries out coal mining activity.
Move frame：When coal mining comes to an end, and support needs to move, hydraulic prop unloading, set cap is in cross support
Under the firm rubbing of bar is supported, level declines, and the hydraulic stem on support base plate shrinks, and support is moved forwards, real
Now move forward a step pitch.
The advantage of the support of the present invention：The coal mining support of the present invention falls within fully mechanized mining supporter, is a kind of new fully mechanized mining
Frame.On the premise of identical working resistance, the more traditional fully mechanized mining supporter weight of this support can mitigate half or so.This is to fully mechanized mining hydraulic pressure
Support has revolutionary change.It is capable of achieving good Social benefit and economic benefit.Lifted using the back timber of cross support bar
Stabilizing mechanism, makes set cap under the restriction of the stabilizing mechanism, and horizontal lifting need not overcome useless inside traditional fully mechanized mining supporter
Work(is consumed, and is decreased the damage to support element, and can be deflected within the specific limits, the adaptability of top board is obtained
Strengthen.Make each associated components of support：The physical dimensions such as back timber, base, advancing jack and pillar and weight are all greatly reduced.
On the premise of identical working resistance is identical effect, hydraulic support overall weight mitigates half or so, can significantly shorten timberer
Make face installation period, workload and labor intensity.As New-support part is slim and graceful, service life increases, support overall work
Efficiency improves a lot, and maintenance maintenance is also more convenient.Hydraulic support in use, needs periodic inspection to keep in repair, a work surface
Year maintenance maintenance cost is up to millions of units.New fully mechanized mining supporter has from cost of transportation to part and part service life is changed
Very big superiority, the maintenance of support year, maintenance cost are greatly lowered compared with conventional stent.Hydraulic support was needed after the stage that works
Move, conventional stent need to ask professional contingent, employ professional equipment, generally, a face moving cycle is at one
Month or so, new fully mechanized mining supporter is lightweight, structure member life-span length, moves without the need for professional equipment, and only with colliery, commonly transport sets
Standby, the removal of home cycle can shorten half.
Description of the drawings
Fig. 1 is the left view of the present invention；
Fig. 2 is the top view of the present invention；
Left views of the Fig. 3 for embodiments of the invention 2；
Fig. 4 is the left view of traditional fully mechanized mining supporter.
1, back timber in figure；2nd, hydraulic prop；3rd, cross support bar one；4th, base plate；5th, hydraulic haulage bar；6th, cross support bar
Two；7th, double leval jib；31st, 32, metallic rod；
The present invention is not limited by this accompanying drawing profile, and in the case where basic structure is constant, only the change of profile is also at this
Among guarantor's scope of patent.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is invented：Embodiment one：Referring to accompanying drawing, cross support bar is provided with
Coal mining support, be provided with back timber 1 and base plate 4, supporting top beam be provided with base plate, and brake the hydraulic pressure of back timber raising and lowering
Pillar 2, the hydraulic prop are provided with four, are vertically fixed on base plate, and the hydraulic haulage for pulling support reach is provided with base plate
Bar 5；Firm back timber is provided with base plate, the support bar of the parallel lifting of back timber is made, the support bar is chi structure, and two bars are
One group, centre is provided with connecting shaft, and the cross support bar 1, cross support bar 26 are arranged on base plate left and right sides, intersects and props up
Four strong points of the top and bottom of strut, are divided into two groups：The two front support points in longitudinal direction and two rear support points, this is forward and backward
In two groups of strong points, one group is linked with the edge of back timber and base plate respectively by movable axis, and another group by slide unit and top
Plate and base plate are slidably connected.The cross support bar for being arranged on base plate both sides, the cross support bar per side are one group
Centre sets axle and intersects two metallic rods being flexibly connected.The cross support bar and back timber and the sliding part of base plate slidable connection
Part, is made up of with the slide plate for being arranged on supporting bar top the slide rail being located on back timber and base plate.Charging electricity is provided with back timber
Pond and emergency light.Gas concentration monitoring device, gas density display and the exceeded alarm of gas density are provided with back timber,
And carry out signal with the upper and lower signal transmission system of mine and be connected.The photographic head in alignment work face is provided with back timber, the photographic head
Signal is carried out with the upper and lower signal transmission system of mine to be connected.Support of mines GPS locator is provided with back timber, the localizer and ore deposit
Area's GPS positioning system is located by connecting.Rechargeable battery, emergency light, gas concentration monitoring device, gas density display, gas
The setting of concentration over-standard alarm, photographic head and support of mines GPS locator is not simply to abandon to beat or heap structure set, they it
Between be provided with the circuit of shared circuit board and coordinate design, and be provided with PLC, the PLC with it is above-mentioned each
Functional part carries out signal and control connection；And the signal inlet and outlet connectors that PLC is controlled are provided with, it is additionally provided with and the upper and lower signal of mine is passed
Defeated system carries out the transmission of wireless signals interface of signal exchange, and the central monitoring computer with the setting of mine upper ground surface and display
Giant-screen carries out wireless signal connection.
Embodiment two：Referring to accompanying drawing, the coal mining support of cross support bar, the intersection for being arranged on base plate both sides are provided with
Strut, the cross support bar per side are to set axle to intersect two metallic rods 31,32 being flexibly connected in the middle of two groups.The intersection
Strut and back timber and the slide unit of base plate slidable connection are by the slide rail being located on back timber and base plate and are arranged on support bar
The roller on top is constituted.The upper end that the cross support bar is connected with back timber is plugged on scalable in interleaving support bar for lower end
Flexible connection termination.The axis hole of the connecting shaft in the middle of the cross support bar is 10cm elongated holes, and connecting shaft can be slided in hole
It is dynamic.Other structures are identical with embodiment one.
Above-described embodiment manufactures experimently 20, after original fully mechanized mining supporter makes the present embodiment structure into, by every original weight
12 tons are kept to only 5 tons.Used on same work surface with each 10 supports, former fully mechanized mining supporter installs 10 framves from transport, to peace
Debug examination, 10 days 15 people's used times of recruitment, 10 frame of the present embodiment structure stand from transport to installation and debugging, 7 people of recruitment, 5 days used times,
The each lifting moving operation of former fully mechanized mining supporter, the operation for needing 3 workmans harder, the support of the present embodiment only need two people easily to grasp
Make；Man-hour is used in lifting moving operation, reduces 5-10 minutes than former support；In 10 fully mechanized mining supporters originally, monthly
Have what damage was reported for repairment, and the present embodiment support tries out three middle of the month, none damage is reported for repairment.The support of the present embodiment is saved significantly
About manufacture, transport, operating cost, alleviate labor intensity, hence it is evident that improve production efficiency.
In the case where the basic structure of the present invention is not changed, the similar change made should also belong to this patent
Among protection domain.
Claims (4)
1. a kind of coal mining support for being provided with cross support bar, is provided with back timber (1) and base plate (4), supporting top beam is provided with base plate
, and the hydraulic prop (2) of back timber raising and lowering is braked, the hydraulic prop is provided with four, is vertically fixed on base plate, the bottom of at
Plate is provided with the hydraulic haulage bar (5) for pulling support reach；It is characterized in that：Firm back timber is provided with base plate, puts down back timber
The support bar of row lifting, the support bar are chi structure, and two bars are one group, and centre is provided with connecting shaft, the cross support bar (3,
6) base plate left and right sides are arranged on, four strong points of the top and bottom of cross support bar are divided into two groups：Before longitudinal direction two
The strong point and two rear support points, in forward and backward two groups of strong points, one group by movable axis respectively with back timber and the edge of base plate
Hinge joint, another group is slidably connected with back timber and base plate by slide unit；The cross support for being arranged on base plate both sides
Bar, between one group or array (31,32), mutually the metallic rod of hinge joint is constituted, each group is centre to the cross support bar per side
If axle intersects two metallic rods being flexibly connected；The cross support bar and back timber and the slide unit of base plate slidable connection,
It is to be made up of with the slide plate or roller for being arranged on supporting bar top the slide rail being located on back timber and base plate；Charging is provided with back timber
Battery and emergency light；Gas concentration monitoring device, gas density display and the exceeded warning of gas density are provided with back timber
Device, and carry out signal with the upper and lower signal transmission system of mine and be connected；The photographic head in alignment work face is provided with back timber, the shooting
Head carries out signal with the upper and lower signal transmission system of mine and is connected；Support of mines GPS locator is provided with back timber, the localizer with
Mining area GPS positioning system is located by connecting.
2. coal mining support according to claim 1, is characterized in that：Above-mentioned rechargeable battery, emergency light, gas density
Monitor, gas density display, the exceeded alarm of gas density, the setting of photographic head and support of mines GPS locator are not
Simply abandon and beat or heap structure set, the circuit of shared circuit board and coordinate design is provided between them, and is provided with PLC controls
Device processed, the PLC carries out signal with above-mentioned each functional part and control is connected；And it is provided with the signal turnover of PLC controls
Interface, be additionally provided with carries out the transmission of wireless signals interface of signal exchange with the upper and lower signal transmission system of mine, and with mine Shangdi
Central monitoring computer and show that giant-screen carries out wireless signal connection that face is arranged.
3. coal mining support according to claim 1, is characterized in that：The upper end that the cross support bar is connected with back timber is
Lower end is plugged on telescopic flexible connection termination in interleaving support bar.
4. coal mining support according to claim 1, is characterized in that：The axis hole of the connecting shaft in the middle of the cross support bar is
Elongated hole, connecting shaft can slide in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033325.4A CN104612736B (en) | 2015-01-23 | 2015-01-23 | It is provided with the coal mining support of cross support bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033325.4A CN104612736B (en) | 2015-01-23 | 2015-01-23 | It is provided with the coal mining support of cross support bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104612736A CN104612736A (en) | 2015-05-13 |
| CN104612736B true CN104612736B (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510033325.4A Active CN104612736B (en) | 2015-01-23 | 2015-01-23 | It is provided with the coal mining support of cross support bar |
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| Country | Link |
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| CN (1) | CN104612736B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905845B (en) * | 2017-10-19 | 2019-05-31 | 秦士杰 | Support of tunnel structure with locating alarming function |
| CN108468560B (en) * | 2018-05-30 | 2024-03-26 | 西安科技大学 | Device and method for mining pseudo-depression inclined long-wall Z-shaped bracket of steep coal seam |
| CN110017169A (en) * | 2019-03-25 | 2019-07-16 | 淮北矿业股份有限公司 | A kind of monitoring system of ore faces roof pressure and gas drainage |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140430A (en) * | 1977-05-05 | 1979-02-20 | Bochumer Eisenhutte Heintzmann Gmbh & Co | Walking mine roof support |
| CN2702055Y (en) * | 2003-12-31 | 2005-05-25 | 黄尚智 | Stabilizing mechanism for telescopic rod of hydraulic support |
| CN201476701U (en) * | 2009-06-04 | 2010-05-19 | 国营第三九四厂 | Packing box of rocket tube trainer |
| CN201496087U (en) * | 2009-08-26 | 2010-06-02 | 四川神坤装备股份有限公司 | Lift platform mechanism for hydraulic bracket with great mining height |
| CN202499686U (en) * | 2012-02-08 | 2012-10-24 | 宁波宝新不锈钢有限公司 | Hydraulic elevator platform used for loading and unloading stainless steel welded pipes |
| CN204663562U (en) * | 2015-01-23 | 2015-09-23 | 柳立新 | Be provided with the coal mining support of cross support bar |
-
2015
- 2015-01-23 CN CN201510033325.4A patent/CN104612736B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140430A (en) * | 1977-05-05 | 1979-02-20 | Bochumer Eisenhutte Heintzmann Gmbh & Co | Walking mine roof support |
| CN2702055Y (en) * | 2003-12-31 | 2005-05-25 | 黄尚智 | Stabilizing mechanism for telescopic rod of hydraulic support |
| CN201476701U (en) * | 2009-06-04 | 2010-05-19 | 国营第三九四厂 | Packing box of rocket tube trainer |
| CN201496087U (en) * | 2009-08-26 | 2010-06-02 | 四川神坤装备股份有限公司 | Lift platform mechanism for hydraulic bracket with great mining height |
| CN202499686U (en) * | 2012-02-08 | 2012-10-24 | 宁波宝新不锈钢有限公司 | Hydraulic elevator platform used for loading and unloading stainless steel welded pipes |
| CN204663562U (en) * | 2015-01-23 | 2015-09-23 | 柳立新 | Be provided with the coal mining support of cross support bar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104612736A (en) | 2015-05-13 |
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