CN201262093Y - Pre/post-positioned caving coal cap stand - Google Patents
Pre/post-positioned caving coal cap stand Download PDFInfo
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- CN201262093Y CN201262093Y CNU200820149624XU CN200820149624U CN201262093Y CN 201262093 Y CN201262093 Y CN 201262093Y CN U200820149624X U CNU200820149624X U CN U200820149624XU CN 200820149624 U CN200820149624 U CN 200820149624U CN 201262093 Y CN201262093 Y CN 201262093Y
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Abstract
A front-rear face hydraulic support for top-caving mining, belonging to coal mine downhole support equipment, includes a front support and a rear support and comprises a traction beam, a front top beam, a rear top beam, a rear caving shied, a front upright column, a rear upright column, a front base and a rear base. The rear caving shied is hinged with the rear base, a drawing beam and a drawing column are arranged on the rear bracket, a front telescopic beam and a rear telescopic beam are arranged on the front top beam and the rear top beam, respectively, and the front base and the rear base are connected via a pulling mechanism. The face hydraulic support provides drawing space for the drawing beam, and can pull the front support and the rear support to move in a segment-by-segment way with no waste rocks falling down from the top. The face hydraulic support has the advantages of large support area, simple structure, good stability and low requirement for gate width; and can be used as a high inclination-angle face hydraulic support. In addition, the pulling beam is uniformly stressed, resulting in no derivation, so that the support has safer and more reliable operating performance and longer service life.
Description
Technical field
The utility model relates to support apparatus under a kind of coal mine, relates in particular to a kind of face end support that work plane is carried out supporting when adopting caving coal technology to carry out mechanical coal mining.
Background technology
Along with applying of coal caving mining method, put the coal technology and drive, but the maintenance of top-coal caving face termination and coal yield problem have become one of principal element of restriction coal caving mining method development in perfect.At present, China's caving coal face end support mainly contains two one group offset (as shown in Figure 1), two one group of middle-set-types, three one group middle-set-type patterns such as (as shown in Figure 3), though these support patterns have obtained effect preferably, but also exist following deficiency: the one, the back timber of entire bracket and base are all longer, rigidity and anti-twisting property are relatively poor, in the integral body relatively difficulty of trying to stop people from fighting each other when mobile.The 2nd, support is two or three and is arranged in parallel side by side, complex structure, and overall width is bigger, and the crossheading width of requirement is also big; And the subframe relative narrower in two one group of offsets and three one group of middle-set-types simultaneously causes its poor stability.The 3rd, be fulcrum all when support is tried to stop people from fighting each other to pass beam, and in two one group of offsets, two one group of middle-set-types the line of force of the passing jack of single support not with the elevating conveyor center symmetry that is connected, formed a couple that it is reversed to passing beam when trying to stop people from fighting each other, especially when passing beam is connected bearing pin with elevating conveyor gap than greatly the time, cause the passing beam to deflect easily, when serious even the piston rod of passing jack can be sprained curvedly, influenced security reliability and the application life of support when work.The 4th, there are not enough coal spaces of putting at the afterbody of support.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, integral rigidity and the anti-twisting property front and rear formula caving coal face end support mobile, safe and reliable, long service life of trying to stop people from fighting each other by force, easily.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is: this front and rear formula caving coal face end support is by preposition support and be attached thereto the rearmounted support that connects and form, preposition support comprises passes beam, preceding back timber, front column and preceding base, between passing beam and preceding base, be provided with the passing jack, the front end of passing jack is connected with the passing beam, the rear end of passing jack is connected with preceding base, pass beam and be provided with retaining mechanism, the two ends up and down of front column are connected with preceding base with preceding back timber respectively; Rearmounted support comprises back back timber, back screen beam, rear column and rear base, and the rear end of back back timber is connected with the front end of back screen beam, and the two ends up and down of rear column are connected with rear base with the back back timber respectively; The rear end of back screen beam is connected with the rear end of rear base; Also be provided with on rearmounted support and put the coal beam and put the coal column, an end of putting the coal beam is connected with the back screen beam, and the two ends up and down of putting the coal column are connected with the other end of putting the coal beam with rear base respectively, are connected by the mechanism of trying to stop people from fighting each other between the base of front and back.
The mechanism of trying to stop people from fighting each other before and after described being arranged between the base comprises try to stop people from fighting each other jack and middle planker, and the front end of middle planker is connected with the rear end of preceding base; Trying to stop people from fighting each other be arranged two in parallel about jack, the rear and front end of each jack of trying to stop people from fighting each other is connected with the rear end of middle planker and the front end of rear base respectively.
Forward and backward back timber also comprises forward and backward extensible canopy respectively, be respectively arranged with parallel hollow box chamber, the left and right sides at the rear portion of preceding back timber and the front portion of back back timber, forward and backward extensible canopy is inserted into respectively in the case chamber, forward and backward flexible jack is housed respectively below forward and backward extensible canopy, one end of forward and backward flexible jack is connected with forward and backward back timber respectively, and the other end of forward and backward flexible jack is connected with forward and backward flexible jack respectively.
The described forward and backward column that is separately positioned on preposition support and the rearmounted support is a hydraulic vertical prop, and 4 front columns are set on preposition support, for about each two be symmetrical arranged; Two rear columns are set on rearmounted support, for about each one be symmetrical arranged; Also be provided with the support balance jack on rearmounted support, the rear and front end of balance jack is connected with the back screen beam with the back back timber respectively.
On preposition support, also be provided with quadric chain, quadric chain is connected to each other by the flange on last connecting rod and symmetrically arranged back link, front rod and the preceding base both sides and forms, the upper end of wherein going up connecting rod is connected with preceding back timber, the lower end of last connecting rod is connected with upper end with front rod and back link respectively, and the lower end of front rod and back link is connected with flange on the preceding base inboard respectively.
Also be provided with hinged front-axle beam and front-axle beam jack on preposition support, the rear end of hinged front-axle beam is connected with preceding back timber, and the rear and front end of front-axle beam jack is connected with preceding back timber with the rear end of hinged front-axle beam respectively.
Back timber, back back timber and back screen beam are provided with upper plate on last plane respectively before described, be provided with side guard board on both sides, its side guard board on one side is set to bending shape and pegs graft with upper plate is movable, be vertically installed with the thruster jack between two side guard boards, the two ends of thruster jack are connected with the side guard board on both sides respectively.
Described passing beam, preceding base, middle planker and rear base are respectively the overall structure that is provided with lower shoe, and its each base plate is positioned at same horizontal plane; Putting the coal beam is the bucket shape beam that is provided with base plate and three side plates.
Because the utility model entire bracket is set to preposition support and rearmounted support, and between preposition support and rearmounted support, be provided with and make try to stop people from fighting each other mechanism and the last extensible canopy that it is connected, back timber has not only extended, make the supporting area bigger, and can under the situation of cash support be carried out the piecewise and try to stop people from fighting each other mobile guaranteeing that the top is not leaked.Because the caving shield afterbody on the rearmounted support directly is hinged with rear base, both simplified the structure again, the length by strengthening caving shield can prevent the coal obstruction coal discharge outlet that build is bigger for the increase of coal discharge outlet size provides the space again.Preposition support of the utility model and rearmounted support are the single support of widening, and be simple in structure, good stability, and the integral rigidity and the anti-twisting property of support are significantly improved, and force piece has been played good anchorage effect, can be used as the high inclination-angle termination point frame and use.Because of the overall width of its overall width less than existing two or three frame end head brackets, desired crossheading width is less relatively.In addition, in this support, pass the line of force and the elevating conveyor center symmetry that is connected of jack, make the passing beam stress even, the zero deflection phenomenon, thus make service behaviour safety and reliability, the longer service life of support.
Description of drawings
Fig. 1 is the structural principle schematic diagram of two one group of offset face end supports in the prior art;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the structural principle schematic diagram of three one group of middle-set-type face end supports in the prior art;
Fig. 4 is the vertical view of base portion among Fig. 3;
Fig. 5 is a structural principle schematic diagram of the present utility model;
Fig. 6 is the vertical view of base portion among Fig. 5.
The specific embodiment
The utility model is big for solving caving coal end support area, the problem that back timber will be rectificated, this caving coal face end support is set to preposition support 4 and is attached thereto the rearmounted support 7 that connects, constitute a very large support space, and working resistance is big, supporting intensity is even, and the working environment of a safety is provided for front and back transporter head and elevating conveyor.Its preposition support 4 comprises passes beam 1, preceding back timber 20, front column 25 and preceding base 26, about being provided with between passing beam 1 and the preceding base 26, pass jack 3, the front end of passing jack 3 is hinged with the rear end of passing beam 1 respectively, and the rear end of passing jack 3 is hinged with the front end of preceding base 26 respectively.The upper end of front column 25 and preceding back timber 20 are hinged, and the lower end of front column 25 and preceding base 26 are hinged.Described passing beam 1 comprises the curb girder of both sides and two curb girders is connected to the lower shoe of an integral body that the curb girder of passing beam 1 is provided with retaining mechanism.In the present embodiment, the retaining mechanism on the described passing beam 1 is to be symmetricly set on the card key of passing on the beam curb girder 2, and the effect of card key 2 is elevating conveyor fixing and lockings of passing on the beam 1 being placed on.In addition, also can retaining mechanism be set to bearing pin, hook or other can be with the form of structure of elevating conveyor fixing and locking.The effect of passing beam 1 is the carrying elevating conveyor, and the effect of passing jack 3 is to come mobile elevating conveyor and spur preposition support by promoting to pass beam 1.
Rearmounted support 7 comprises back back timber 14, back screen beam 11, rear column 15 and rear base 8, and the upper end of rear column 15 is hinged with back back timber 14, and the lower end of rear column 15 and rear base 8 are hinged, and the front end of the rear end of back back timber 14 and back screen beam 11 is hinged.On rearmounted support 7, also be provided with and put coal beam 9 and put coal column 10, put coal beam 9 for being provided with the bucket shape beam of base plate and three side plates, rear end and the back screen beam 11 of putting coal beam 9 are hinged, the upper end of putting coal column 10 is hinged with the preceding bottom of putting coal beam 9, puts the lower end of coal column 10 and the afterbody of rear base 8 and is hinged.Rear end direct by bearing pin and rear base 8, the rear end of back screen beam 11 is hinged, this connected mode is compared with the connected mode of band front-rear linkage in the prior art, its structure becomes simpler, also increased simultaneously the length of caving shield 11, make the angle of regulation range of putting coal beam 9 big, for the increase of coal discharge outlet size provides the space, can prevent that the bigger coal of build from stopping up coal discharge outlet.Also be provided with support balance jack 13 on rearmounted support 7, the forward and backward two ends of balance jack 13 are hinged with back back timber 14 and back screen beam 11 respectively.Be connected by the mechanism of trying to stop people from fighting each other between the forward and backward base.
In the present embodiment, the described forward and backward column that is separately positioned on preposition support 4 and the rearmounted support 7 is a hydraulic vertical prop, preposition support 4 is provided with four front columns 25, each two are symmetrical arranged about being, be the four post support shield type support, the upper/lower terminal of four front columns 25 is hinged with preceding back timber 20 and preceding base 26 respectively.Rearmounted support 7 is provided with two rear columns 15, and each one is symmetrical arranged about being, and is two column protected cribbing, and the upper/lower terminal of two rear columns 15 is hinged with back back timber 14 and rear base 8 respectively.In addition, also can be according to the needs of site operation, each is set to other radical different with the utility model respectively with forward and backward column.
The described mechanism of trying to stop people from fighting each other that is arranged between the forward and backward base comprises try to stop people from fighting each other jack 6 and middle planker 5, and the rear end of the front end of middle planker 5 and preceding base 26 is hinged.Try to stop people from fighting each other two that be arranged in parallel about jack 6 is, the front end of each jack 6 of trying to stop people from fighting each other and the rear end of middle planker 5 are hinged, and the rear end of each jack 6 of trying to stop people from fighting each other and the front end of rear base 8 are hinged.Planker 5 is for being provided with the overall structure of lower shoe in the middle of described in the utility model, and two jack 6 of trying to stop people from fighting each other are placed on the lower shoe of middle planker 5.
In addition, planker 5 in the middle of also can not being provided with in the mechanism of trying to stop people from fighting each other directly is hinged the two ends of two jack 6 of trying to stop people from fighting each other with forward and backward base; Can also the mechanism of trying to stop people from fighting each other be set between forward and backward base, directly carry out forward and backward base hinged.
Forward and backward back timber also comprises front stretching beam 29 and back extensible canopy 18 respectively.At the rear portion of preceding back timber 20 and the front portion of back back timber 14, be respectively arranged with parallel hollow box chamber, the left and right sides, forward and backward extensible canopy 29 and 18 is inserted into respectively in the case chamber, and front stretching jack 30 is housed below front stretching beam 29, and the flexible jack 19 in back is housed below the extensible canopy 18 of back.Each is made up of two jack forward and backward flexible jack respectively; An end of flexible jack 19 is hinged with preceding back timber 20 respectively after two, and the other end of flexible jack 19 is hinged with back extensible canopy 18 respectively after two.One end of two front stretching jack 29 is hinged with back back timber 14 respectively, and the other end of two front stretching jack 29 is hinged with front stretching beam 30 respectively.Back extensible canopy 18 and front stretching beam 29 respectively before hollow box chamber on back timber 20 and the back back timber 14 be that guide rail stretches out and withdraw, forward and backward flexible jack is respectively applied for and drives two extensible canopies and realize the front and back displacement.In the present embodiment, back extensible canopy 18 on the preceding back timber 20 is the beam that often contracts, and stretches out the space that forms between the forward and backward back timber when its effect is the closed supports reach in preposition support 4 reach processes in good time, back timber still forms a support space of sealing basically, anti-leak-stopping cash before and after making.Finish in the reach process, withdraw when rearmounted support moves forward, for the front stretching beam 29 on the back timber 14 of back is stepped down.Front stretching beam 29 on the back back timber 14 is in the state that often stretches out, its effect is to fall frame at rearmounted support 7, rise in the process of frame, remedies because the change of unsupported back span between the forward and backward back timber that the amplitude of fluctuation of back back timber 14 causes by the collapsing length of adjusting front stretching beam 29.
In addition, also being provided with of forward and backward extensible canopy operation program can be arranged to exchange; Or forward and backward extensible canopy is set to the beam that often contracts simultaneously; Can also be only extensible canopy and flexible jack be set any independent side of preceding top beam rear end or back back timber front end.
On preposition support 4, also be provided with quadric chain, quadric chain is connected to each other by the flange on last connecting rod 24 and symmetrically arranged back link 22, front rod 23 and preceding base 26 both sides and forms, upper end and the preceding back timber 20 of wherein going up connecting rod 24 are hinged, the lower end of last connecting rod 24 is hinged with the upper end of front rod 23 and back link 22 respectively, the lower end of front rod 23 and back link 22 respectively with preceding base 26 inboards on flange be hinged.Because pin joint is bigger apart from support bottom surface height, guaranteed elevating conveyor from connecting rod below by the space in, also improved the force-bearing situation of quadric chain, its intensity and stability all strengthened greatly, reliability is also significantly improved.Front rod and back link have also reduced taking up room of quadric chain in the form of bilateral symmetry setting.
On preposition support 4, also be provided with hinged front-axle beam 28 and front-axle beam jack 27, the rear end of hinged front-axle beam 28 and preceding back timber 20 are hinged, the forward and backward two ends of front-axle beam jack 27 are hinged with hinged front-axle beam 28 and preceding back timber 20 respectively, are used to drive hinged front-axle beam 28 and do the backswing campaign.
In addition, described preposition support and rearmounted bracket base can also be set to not have the split type base of middle lower shoe respectively, and elevating conveyor directly is seated on the work plane base plate.
The utility model can also according to mine on the spot needs adopt other scheme: as hinged front-axle beam is not set, or front stretching beam, anti-wall caving are set on preposition support on preposition support, and rear base plate etc. are set in the rear base rear end.
Its operating principle is: when passing elevating conveyor, with the preposition support 4 that supports top board is fulcrum, the piston rod of passing jack 3 stretches out, and promotes to pass beam 1 reach, and drives elevating conveyor slippage forward on the lower shoe of preceding base 26, middle planker 5, rear base 8.When moving preposition support 4, post falls in front column 25, pass the piston rod withdrawal of jack 3, the piston rod of jack 6 of trying to stop people from fighting each other stretches out, spur preposition support 4 reaches, back extensible canopy jack 19 piston rods on the simultaneously preceding back timber 20 stretch out, and release back extensible canopy 18, make back extensible canopy 18 and back back timber 14 and front stretching beam 29 still can form a support space of sealing basically, anti-leak-stopping cash.After preposition support moves and finishes, draw and move rearmounted support 7, post falls in rear column 15, and jack 6 piston rods of trying to stop people from fighting each other withdrawal spurs rearmounted support 7 reaches.Back extensible canopy jack 19 piston rods withdrawal simultaneously on the back timber 20 retracts the back extensible canopy 18 on the preceding back timber, when having abdicated rearmounted support and having moved forward after back timber 14 needed mobile spaces.So just finished a working cycles.The variation of the forward and backward back timber spacing that produces because of back back timber swing when rearmounted support moves can be adjusted by changing the go forward collapsing length of extensible canopy of back back timber.
Claims (8)
1, a kind of front and rear formula caving coal face end support, by preposition support be attached thereto the rearmounted support that connects and form, preposition support comprises passes beam, preceding back timber, front column and preceding base, between passing beam and preceding base, be provided with the passing jack, the front end of passing jack is connected with the passing beam, the rear end of passing jack is connected with preceding base, passes beam and is provided with retaining mechanism, and the two ends up and down of front column are connected with preceding base with preceding back timber respectively; Rearmounted support comprises back back timber, back screen beam, rear column and rear base, and the rear end of back back timber is connected with the front end of back screen beam, and the two ends up and down of rear column are connected with rear base with the back back timber respectively; It is characterized in that: the rear end of back screen beam is connected with the rear end of rear base; Also be provided with on rearmounted support and put the coal beam and put the coal column, an end of putting the coal beam is connected with the back screen beam, and the two ends up and down of putting the coal column are connected with the other end of putting the coal beam with rear base respectively, are connected by the mechanism of trying to stop people from fighting each other between the base of front and back.
2, front and rear formula caving coal face end support according to claim 1 is characterized in that: the mechanism of trying to stop people from fighting each other before and after described being arranged between the base comprises try to stop people from fighting each other jack and middle planker, and the front end of middle planker is connected with the rear end of preceding base; Trying to stop people from fighting each other be arranged two in parallel about jack, the rear and front end of each jack of trying to stop people from fighting each other is connected with the rear end of middle planker and the front end of rear base respectively.
3, front and rear formula caving coal face end support according to claim 2, it is characterized in that: forward and backward back timber also comprises forward and backward extensible canopy respectively, be respectively arranged with parallel hollow box chamber, the left and right sides at the rear portion of preceding back timber and the front portion of back back timber, forward and backward extensible canopy is inserted into respectively in the case chamber, forward and backward flexible jack is housed respectively below forward and backward extensible canopy, one end of forward and backward flexible jack is connected with forward and backward back timber respectively, and the other end of forward and backward flexible jack is connected with forward and backward flexible jack respectively.
4, front and rear formula caving coal face end support according to claim 3, it is characterized in that: the described forward and backward column that is separately positioned on preposition support and the rearmounted support is a hydraulic vertical prop, 4 front columns are set on preposition support, for about each two be symmetrical arranged; Two rear columns are set on rearmounted support, for about each one be symmetrical arranged; Also be provided with the support balance jack on rearmounted support, the rear and front end of balance jack is connected with the back screen beam with the back back timber respectively.
5, front and rear formula caving coal face end support according to claim 4, it is characterized in that: on preposition support, also be provided with quadric chain, quadric chain is connected to each other by the flange on last connecting rod and symmetrically arranged back link, front rod and the preceding base both sides and forms, the upper end of wherein going up connecting rod is connected with preceding back timber, the lower end of last connecting rod is connected with upper end with front rod and back link respectively, and the lower end of front rod and back link is connected with flange on the preceding base inboard respectively.
6, front and rear formula caving coal face end support according to claim 5, it is characterized in that: on preposition support, also be provided with hinged front-axle beam and front-axle beam jack, the rear end of hinged front-axle beam is connected with preceding back timber, and the rear and front end of front-axle beam jack is connected with preceding back timber with the rear end of hinged front-axle beam respectively.
7, front and rear formula caving coal face end support according to claim 6, it is characterized in that: back timber, back back timber and back screen beam are provided with upper plate on last plane respectively before described, be provided with side guard board on both sides, its side guard board on one side is set to bending shape and pegs graft with upper plate is movable, be vertically installed with the thruster jack between two side guard boards, the two ends of thruster jack are connected with the side guard board on both sides respectively.
8, front and rear formula caving coal face end support according to claim 7, it is characterized in that: described passing beam, preceding base, middle planker and rear base are respectively the overall structure that is provided with lower shoe, and its each base plate is positioned at same horizontal plane; Putting the coal beam is the bucket shape beam that is provided with base plate and three side plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820149624XU CN201262093Y (en) | 2008-10-08 | 2008-10-08 | Pre/post-positioned caving coal cap stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820149624XU CN201262093Y (en) | 2008-10-08 | 2008-10-08 | Pre/post-positioned caving coal cap stand |
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| Publication Number | Publication Date |
|---|---|
| CN201262093Y true CN201262093Y (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820149624XU Expired - Lifetime CN201262093Y (en) | 2008-10-08 | 2008-10-08 | Pre/post-positioned caving coal cap stand |
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| CN (1) | CN201262093Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182487A (en) * | 2011-05-09 | 2011-09-14 | 郑州煤矿机械集团股份有限公司 | Liquid filling hydraulic support |
| CN102182477A (en) * | 2011-04-07 | 2011-09-14 | 中国神华能源股份有限公司 | Mining method for mechanized mining working surface end and corresponding end support bracket |
| CN102235173A (en) * | 2010-04-30 | 2011-11-09 | 三一重型装备有限公司 | Locking device of hydraulic bracket side guard plate |
| CN102251789A (en) * | 2011-08-04 | 2011-11-23 | 中平能化集团机械制造有限公司 | Integrated self-shift hydraulic support for placing top coal in steeply inclined roadway |
| CN102305093A (en) * | 2011-09-29 | 2012-01-04 | 郑州四维机电设备制造有限公司 | Transitional hydraulic bracket for gob-side entry retaining |
| CN102168572B (en) * | 2010-02-25 | 2012-10-10 | 郑州四维机电设备制造有限公司 | Waste filling supporting bracket |
| CN103899343A (en) * | 2014-04-21 | 2014-07-02 | 安徽理工大学 | Three-freedom-degree parallel hydraulic support |
| CN104533518A (en) * | 2014-12-19 | 2015-04-22 | 郑州煤矿机械集团股份有限公司 | Protection support for roadway-side packing wall |
| CN109538267A (en) * | 2018-12-21 | 2019-03-29 | 中煤北京煤矿机械有限责任公司 | A kind of high stability high-adaptability overlength supported laneway end support equipment |
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2008
- 2008-10-08 CN CNU200820149624XU patent/CN201262093Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168572B (en) * | 2010-02-25 | 2012-10-10 | 郑州四维机电设备制造有限公司 | Waste filling supporting bracket |
| CN102235173A (en) * | 2010-04-30 | 2011-11-09 | 三一重型装备有限公司 | Locking device of hydraulic bracket side guard plate |
| CN102235173B (en) * | 2010-04-30 | 2013-11-06 | 三一重型装备有限公司 | Locking device of hydraulic bracket side guard plate |
| CN102182477A (en) * | 2011-04-07 | 2011-09-14 | 中国神华能源股份有限公司 | Mining method for mechanized mining working surface end and corresponding end support bracket |
| CN102182487A (en) * | 2011-05-09 | 2011-09-14 | 郑州煤矿机械集团股份有限公司 | Liquid filling hydraulic support |
| CN102182487B (en) * | 2011-05-09 | 2013-04-03 | 郑州煤矿机械集团股份有限公司 | Liquid filling hydraulic support |
| CN102251789A (en) * | 2011-08-04 | 2011-11-23 | 中平能化集团机械制造有限公司 | Integrated self-shift hydraulic support for placing top coal in steeply inclined roadway |
| CN102305093A (en) * | 2011-09-29 | 2012-01-04 | 郑州四维机电设备制造有限公司 | Transitional hydraulic bracket for gob-side entry retaining |
| CN103899343A (en) * | 2014-04-21 | 2014-07-02 | 安徽理工大学 | Three-freedom-degree parallel hydraulic support |
| CN103899343B (en) * | 2014-04-21 | 2015-10-07 | 安徽理工大学 | Freedom degree parallel connection hydraulic support |
| CN104533518A (en) * | 2014-12-19 | 2015-04-22 | 郑州煤矿机械集团股份有限公司 | Protection support for roadway-side packing wall |
| CN109538267A (en) * | 2018-12-21 | 2019-03-29 | 中煤北京煤矿机械有限责任公司 | A kind of high stability high-adaptability overlength supported laneway end support equipment |
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Address after: 450001 No. 7 shuttle Road, hi tech Industrial Development Zone, Henan, Zhengzhou Patentee after: Caterpillar (Zhengzhou) Co., Ltd. Address before: 450001 No. 7 shuttle Road, hi tech Industrial Development Zone, Henan, Zhengzhou Patentee before: Zhengzhou Siwei Electromechanical Equipment Manufacturing Co., Ltd. |
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