CN103407737A - Stepping self-moving rubber belt conveyor tail used for fast driving - Google Patents
Stepping self-moving rubber belt conveyor tail used for fast driving Download PDFInfo
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- CN103407737A CN103407737A CN2013102813651A CN201310281365A CN103407737A CN 103407737 A CN103407737 A CN 103407737A CN 2013102813651 A CN2013102813651 A CN 2013102813651A CN 201310281365 A CN201310281365 A CN 201310281365A CN 103407737 A CN103407737 A CN 103407737A
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Abstract
The invention belongs to the technical field of designing and manufacturing of driving working face devices in a coal mine and particularly relates to a stepping self-moving rubber belt conveyor tail used for fast driving. The problems existing in the moving mode of an existing driving working face belt conveyor tail are solved. The stepping self-moving rubber belt conveyor comprises a rigid frame, a roller and a rack. The rack comprises a front rack and a back rack, a beam is connected between the front rack and the back rack, a base is arranged between the front rack and the back rack, and guide rails are connected with the bottom of the base. A push moving oil cylinder is arranged on the beam, and a stand column mechanism and a four-bar mechanism are arranged at the top of the base. Roller boxes are arranged on the two sides of the front rack and the two sides of the back rack. The roller boxes are matched with the guide rails in a sliding mode, and lifting oil cylinders are connected inside the roller boxes and arranged in the vertical direction. The stepping mode is unique, and a set of device combines a hydraulic support and the belt conveyor tail to achieve stepping self moving, so that the requirement for fast moving of the device under different working conditions is met. The stepping self-moving rubber belt conveyor tail is simple in structure, convenient to install and flexible in operation.
Description
Technical field
The invention belongs to the technical field of driving face equipment design and manufacture under coal mine, specifically a kind of speedy drivage moves adhesive tape machine tail certainly with step type.
Background technology
At present, the move mode that driving face belt machine end in down-hole is general has three kinds: development machine draws and moves, winch draws, self-movable foot end moves certainly.It is larger to coal seam floor failure that development machine draws migration to walk again, and always easily the belt feeder tail is drawn partially.The winch traction method is simple and convenient, but steel rope draws while moving and affects surrounding devices normal operation, and exists wire cable rupture to cause the hidden danger of safety misadventure.The belt feeder self-movable foot end be by with the elevating conveyor cooperating, the dependence elevating conveyor is fixed piovt point, utilizes the passing oil cylinder pushing belt machine end that fuselage carries to move, and is only applicable to coal wall.
Summary of the invention
The present invention, in order to solve the problems referred to above that under existing well, driving face belt machine end move mode exists, provides a kind of speedy drivage certainly to move adhesive tape machine tail with step type.
The present invention adopts following technical scheme to realize:
Speedy drivage moves adhesive tape machine tail certainly with step type, comprise rigid mount, cylinder and frame, it is characterized in that described frame comprises forebay and afer bay, connecting cross beam between forebay and afer bay, before and after be provided with between frame across the base of the box-structure on crossbeam, base bottom connection guide rail, on crossbeam, be provided with the passing oil cylinder, pass oil cylinder one end and connect base, the other end connects forebay, the anterior column agency that the base top setting is welded as a whole with it and rear portion four-bar linkage, the top of column agency and four-bar linkage is the connection bracket back timber all, before, the both sides of afer bay all are provided with roller box, roller box and guide rail bearing fit, the hoist cylinder that in roller box, the vertical connecting direction arranges, the afer bay rear side connects hydraulic wireline winch.
Described column agency comprises actuator cylinder formula column, the column top arranges set cap, described four-bar linkage comprises front rod, rear linking rod, hydraulic support foundation and caving shield, hydraulic support foundation is fixed on base, hydraulic support foundation is that upper surface is inclined-plane, the high-end hinged front rod in the front portion of upper surface, the hinged rear linking rod of rear portion low side, the other end of front rod and rear linking rod is hinged with caving shield respectively again, upper end and the set cap of caving shield are hinged, between set cap and caving shield, also by balance jack, connect, one end and the set cap of balance jack are hinged, the other end and caving shield are hinged.
The vertical cross-section of described set cap is " recessed " shape.
Described set cap concave structure top planes part outer and be single plate structure.
Described front and rear connecting rods Length Ratio is 1:1, on caving shield, the ratio of the spacing of front and rear connecting rods hinge and caving shield length is 1:4, rear linking rod when the hydraulic support extreme higher position and the base plate angle of hydraulic support foundation be 80 °, hydraulic support is at the S-shaped hyperbola of path of motion of motion process medium-height trestle back timber and caving shield hinge-point, and hunting range is ± 6mm.
Described set cap is provided with spacing arc plate in the contact site of itself and caving shield hinged place, and spacing arc plate restriction back timber swinging on extreme lower position is 10 ° to the maximum, and under extreme higher position, swinging is 10 ° to the maximum.
Described hydraulic support foundation is greater than the width of hydraulic support foundation in the part of four-bar linkage structure bottom at the width of the part of column bottom, by the arc structure transition, connects between two parts.
The tuningout oil cylinder is installed on described crossbeam.
The interior setting of the roller box of frame both sides, described front and back is the interior guide cylinder of the box-structure of roller box slip relatively, and interior guide cylinder is connected by bearing pin with hoist cylinder.
Described guide rail top is inverted v-shaped structure, and the roller box bottom is the hook-shaped structure, works in coordination.
The present invention's mode uniqueness of taking a step, it is that support support and belt feeder tail are combined to a covering device of realizing taking a step from moving, its support support pressure and take a step all to regulate with the situation according to roof and floor from moving mechanism thrust, meet the requirement that all realizes the equipment quick travel under different operating modes.Adhesive tape machine tail is simple in structure, easy for installation, flexible operation from moving for step type, is the ideal equipment that mechanical electronic hydraulic is combined.Particularly:
1. the brand-new adhesive tape tail physical construction of the present invention, realize taking a step from moving, and can adapt to complicated base plate condition, broken away from adhesive tape tail moving process the dependence to other underground equipment.
2. stepping mechanism is installed on drive end unit, the oil cylinder negligible amounts, and reliability is high.
3. the adjust high cylinder system that has synchronizing function, can guarantee balance of plant lifting in the process of alternately taking a step, and makes the stable action of taking a step.
4. subsidiary support hydraulic support, can need that pulling force is very large provides enough pulling force in the situation that tunnel inclement condition or draw moves belt.
With certainly transfer carrier aircraft and coordinate the stroke that connects material long, be not less than 60m.
6. the device length of disposable movement is large, can realize and reprint discharging and coordinate the 60m rigid mount of discharging to move simultaneously.
The relative prior art of the present invention has following beneficial effect: the invention solves under coal mine in continual mining working surface, the problems such as the construction that driving is followed heading equipment reach existence with belt is inconvenient, work capacity is large, labour intensity is high, changed the tail reach must rely on the present situation that other production facilities pulls; Automatic moving type adhesive tape tail has the characteristics of conveniently moving, to the roadway floor strong adaptability, has good market outlook.The present invention effectively coordinates the stroke that connects material to meet down-hole to produce needs in one day, and completed 60m reach required time and be no more than 5 hours, and have from dividing a word with a hyphen at the end of a line away, the belt anti-deviation function.Step type is equally applicable to the supporting of the tunneling methods such as continuous miner, anchor driving machine and fully-mechanized digging machine from moving adhesive tape machine tail, to enhancing productivity, has greater significance.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention,
Fig. 2 is front view of the present invention,
Fig. 3 is birds-eye view of the present invention,
Fig. 4 is the front view of bracing or strutting arrangement of the present invention,
Fig. 5 is the birds-eye view of bracing or strutting arrangement of the present invention,
Fig. 6 is the lateral plan of bracing or strutting arrangement of the present invention,
Fig. 7 is 10 ° of spacing schematic diagrams of pendulum on the back timber of hydraulic support extreme higher position,
Fig. 8 is 10 ° of spacing schematic diagrams of the hydraulic support extreme higher position back timber bottom,
In figure: 1-rigid mount, 2-carrying roller, 3-swabbing pig, 4-collet roller, 5-bracing or strutting arrangement, 6-afer bay 7-hydraulic wireline winch, 8-hoist cylinder, 9-roller box, 10-tuningout oil cylinder, 11-crossbeam, 12-base, 13-forebay, 14-cylinder, 15-guide rail.
5.1-set cap, 5.2-column, 5.3-balance jack, 5.4-caving shield, 5.5-front rod, 5.6-rear linking rod, 5.7-hydraulic support foundation, the spacing arc plate of 5.8-.
The specific embodiment
By reference to the accompanying drawings the specific embodiment of the present invention is described further.
Speedy drivage moves adhesive tape machine tail mainly by from moving mechanism (frame, support) and some rigid mounts of saving the bearing pin connection, forming certainly with step type, the rigid mount loading and unloading material that during work, the device for discharging supporting with it can be in its overall length be the 60m scope, realized the continuous transportation of coal.Speedy drivage has from shifting function from moving adhesive tape machine tail with step type, can by the support hydraulic support with from moving mechanism, realize the follow-up of taking a step in the situation that tunnelling equipment moves forward, convenient, flexible.Step type has reduced the number of times that moves back and forth of tractor equipment in the tunnel from the invention that moves adhesive tape machine tail, reduced the degree of tortuosity of equipment to floor, simplified tail reach work, reduce drawing of tail every day and moved number of times, extend equipment and moved the cycle of establishing, overcome and pulled or the traction belts tail causes draws partially, improved headwork efficiency, met the requirement of coal lane high-speed driving.
Speedy drivage moves adhesive tape machine tail certainly with step type, comprise rigid mount 1, cylinder 14 and frame, described frame comprises forebay 13 and afer bay 6, connecting cross beam 11 between forebay 13 and afer bay 6, before and after be provided with between frame across the base 12 of the box-structure on crossbeam 11, base 12 bottom connection guide rails 15, on crossbeam, be provided with the passing oil cylinder, pass oil cylinder one end and connect base, the other end connects forebay, base 12 tops arrange anterior column agency and the rear portion four-bar linkage be welded as a whole with it, the top of column agency and four-bar linkage is connection bracket back timber 5.1 all, before, the both sides of afer bay all are provided with roller box 9, roller box 9 and guide rail 15 bearing fits, the hoist cylinder 8 that the interior vertical connecting direction of roller box 9 arranges, afer bay 6 rear sides connect hydraulic wireline winch 7.
Described column agency comprises actuator cylinder formula column 5.2, column 5.2 tops arrange set cap 5.1, described four-bar linkage comprises front rod 5.5, rear linking rod 5.6, hydraulic support foundation 5.7 and caving shield 5.4, hydraulic support foundation 5.7 is fixed on base 12, hydraulic support foundation 5.7 is inclined-plane for upper surface, the high-end hinged front rod 5.5 in the front portion of upper surface, the hinged rear linking rod 5.6 of rear portion low side, the other end of front rod 5.5 and rear linking rod 5.6 is hinged with caving shield 5.4 respectively again, the upper end of caving shield 5.4 and set cap 5.1 are hinged, between set cap 5.1 and caving shield 5.4, also by balance jack 5.3, connect, one end and the set cap 5.1 of balance jack 5.3 are hinged, the other end and caving shield 5.4 are hinged.
The vertical cross-section of described set cap 5.1 is " recessed " shape.
Described set cap 5.1 concave structure top planes part outers and be single plate structure.
Described front and rear connecting rods Length Ratio is 1:1, on caving shield, the ratio of the spacing of front and rear connecting rods hinge and caving shield length is 1:4, rear linking rod 5.6 when the hydraulic support extreme higher position and the base plate angle of hydraulic support foundation 5.7 be 80 °, hydraulic support is at the path of motion S-shaped hyperbola of motion process medium-height trestle back timber 5.1 with caving shield 5.4 hinge-points, and hunting range is ± 6mm.
Described set cap 5.1 is provided with spacing arc plate 5.8 in the contact site of itself and caving shield 5.4 hinged places, and spacing arc plate 5.8 restriction back timbers 5.1 swinging on extreme lower position is 10 ° to the maximum, and under extreme higher position, swinging is 10 ° to the maximum.
Described hydraulic support foundation 5.7 is greater than the width of hydraulic support foundation 5.7 in the part of four-bar linkage structure bottom at the width of the part of column 5.2 bottoms, by the arc structure transition, connects between two parts.
Tuningout oil cylinder 10 is installed on crossbeam 11.On crossbeam, be welded with the ears connecting panel, and with bearing pin, be connected between the oil cylinder monaural, during work, rotation is to parallel with roadway floor.
The interior setting of the roller box of frame both sides, front and back is the interior guide cylinder of the box-structure of roller box slip relatively, and interior guide cylinder is connected by bearing pin with hoist cylinder.The guide rail top is inverted v-shaped structure, and the roller box bottom is the hook-shaped structure, works in coordination.Under the effect of hoist cylinder, roller box bottom hook with " V " type guide rail, coordinate make base can be in the vertical direction, move reciprocatingly in oil cylinder stroke.
Working process of the present invention is: hydraulic support support, hoist cylinder stretch out → frame is unsettled → pass step pitch → hydraulic support of oil cylinder pushing tail reach, hoist cylinder contractions → base unsettled → the passing oil cylinder draws base and support to move to the initial of next step pitch.This mode of taking a step does not rely on other equipment, belongs to " certainly moving " on complete meaning.
Specifically:
1. the front and back frame connects by high strength bolt with crossbeam 11, and crossbeam length reaches 4.58m, provides available space for passing step pitch.
2. hoist cylinder 8 is connected by bearing pin with roller box 9, roller box coordinates with " V " shape face of base upper rail, when the hoist cylinder piston rod stretches out, make base ground connection, frame is unsettled, the column of supporting construction rises simultaneously, the support support, moving for drawing of equipment package provides enough large friction force, in this state, there is the 200mm gap on frame and ground, can strengthen the comformability of equipment to ground.
3. bracing or strutting arrangement is retracted, and hoist cylinder is packed up, and passes the oil cylinder contraction wheel in roller box is rolled at guide rail " V " shape face, makes equipment package get back to the initial condition of each step pitch.
4. hydraulic wireline winch 7 connects with high strength bolt with frame, is the another set of propulsion source of equipment package, guarantees the reliability service of equipment.
5. tuningout oil cylinder 10 is connected on crossbeam, effectively the deflection of conditioning equipment.
6. guide rail and base are structure as a whole, and can effectively with support, support each other.
7. base is box-structure, can carry larger load.
8. frame, interior guide cylinder, hoist cylinder three link together by bearing pin, have guaranteed the stationarity of lifting action, conformability.
Claims (10)
1. a speedy drivage moves adhesive tape machine tail certainly with step type, comprise rigid mount (1), cylinder (14) and frame, it is characterized in that described frame comprises forebay (13) and afer bay (6), connecting cross beam (11) between forebay (13) and afer bay (6), before and after be provided with between frame across the base (12) of the box-structure on crossbeam (11), base (12) bottom connection guide rail (15), on crossbeam, be provided with the passing oil cylinder, pass oil cylinder one end and connect base, the other end connects forebay, base (12) top arranges anterior column agency and the rear portion four-bar linkage be welded as a whole with it, the top of column agency and four-bar linkage is connection bracket back timber (5.1) all, before, the both sides of afer bay all are provided with roller box (9), roller box (9) and guide rail (15) bearing fit, the hoist cylinder (8) that the interior vertical connecting direction of roller box (9) arranges, afer bay (6) rear side connects hydraulic wireline winch (7).
2. speedy drivage according to claim 1 moves adhesive tape machine tail certainly with step type, it is characterized in that described column agency comprises actuator cylinder formula column (5.2), column (5.2) top arranges set cap (5.1), described four-bar linkage comprises front rod (5.5), rear linking rod (5.6), hydraulic support foundation (5.7) and caving shield (5.4), hydraulic support foundation (5.7) is fixed on base (12), hydraulic support foundation (5.7) is inclined-plane for upper surface, the high-end hinged front rod in the front portion of upper surface (5.5), the hinged rear linking rod of rear portion low side (5.6), the other end of front rod (5.5) and rear linking rod (5.6) is hinged with caving shield (5.4) respectively again, the upper end of caving shield (5.4) and set cap (5.1) are hinged, between set cap (5.1) and caving shield (5.4), also by balance jack (5.3), connect, one end of balance jack (5.3) and set cap (5.1) are hinged, the other end and caving shield (5.4) are hinged.
3. speedy drivage according to claim 2 from moving adhesive tape machine tail, is characterized in that the vertical cross-section of described set cap (5.1) is " recessed " shape with step type.
4. the speedy drivage according to claim 3 automatic moving type adhesive tape tail bracing or strutting arrangement of taking a step, is characterized in that described set cap (5.1) concave structure top planes part outer and be single plate structure.
5. according to claim 2 or the 3 or 4 described speedy drivages automatic moving type adhesive tape tail bracing or strutting arrangement of taking a step, it is characterized in that described front and rear connecting rods Length Ratio is 1:1, on caving shield, the ratio of the spacing of front and rear connecting rods hinge and caving shield length is 1:4, rear linking rod (5.6) when the hydraulic support extreme higher position and the base plate angle of hydraulic support foundation (5.7) be 80 °, hydraulic support is at the path of motion S-shaped hyperbola of motion process medium-height trestle back timber (5.1) with caving shield (5.4) hinge-point, and hunting range is ± 6mm.
6. the speedy drivage according to claim 5 automatic moving type adhesive tape tail bracing or strutting arrangement of taking a step, it is characterized in that described set cap (5.1) is provided with spacing arc plate (5.8) in the contact site of itself and caving shield (5.4) hinged place, spacing arc plate (5.8) restriction back timber (5.1) swinging on extreme lower position is 10 ° to the maximum, and under extreme higher position, swinging is 10 ° to the maximum.
7. the speedy drivage according to claim 6 automatic moving type adhesive tape tail bracing or strutting arrangement of taking a step, it is characterized in that described hydraulic support foundation (5.7) is greater than the width of hydraulic support foundation (5.7) in the part of four-bar linkage structure bottom at the width of the part of column (5.2) bottom, connects by the arc structure transition between two parts.
8. speedy drivage according to claim 7 from moving adhesive tape machine tail, is characterized in that on crossbeam (11) being equipped with tuningout oil cylinder (10) with step type.
Speedy drivage according to claim 8 with step type from moving adhesive tape machine tail, interior the setting of roller box (9) of the frame both sides interior guide cylinder of the box-structure of roller box slip relatively before and after it is characterized in that, interior guide cylinder is connected by bearing pin with hoist cylinder.
10. speedy drivage according to claim 9 from moving adhesive tape machine tail, is characterized in that described guide rail (15) top is inverted v-shaped structure with step type, and roller box (9) bottom is the hook-shaped structure, works in coordination.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281365.1A CN103407737B (en) | 2013-07-05 | 2013-07-05 | Speedy drivage step type is from moving adhesive tape machine tail |
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| CN201310281365.1A CN103407737B (en) | 2013-07-05 | 2013-07-05 | Speedy drivage step type is from moving adhesive tape machine tail |
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| CN103407737A true CN103407737A (en) | 2013-11-27 |
| CN103407737B CN103407737B (en) | 2016-02-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790998A (en) * | 2015-04-16 | 2015-07-22 | 中国煤炭科工集团太原研究院有限公司 | Stepping self-moving anchoring device of equipment train |
| CN105173604A (en) * | 2015-09-22 | 2015-12-23 | 中国煤炭科工集团太原研究院有限公司 | Self-advancing tail device of underground coal mine belt conveyor |
| CN105201552A (en) * | 2015-09-30 | 2015-12-30 | 中国煤炭科工集团太原研究院有限公司 | Train with reducing resistance moving mechanism for stepping self-moving tail |
| CN105971599A (en) * | 2016-05-11 | 2016-09-28 | 中国煤炭科工集团太原研究院有限公司 | Efficient and rapid tunneling system for coal roadway |
| CN106276058A (en) * | 2016-09-26 | 2017-01-04 | 原平市丰汇机械制造有限公司 | Flexible traveling, bending operating unicorn block belt feeder |
| CN109720783A (en) * | 2018-12-05 | 2019-05-07 | 中国煤炭科工集团太原研究院有限公司 | A kind of flexible tape elevating conveyor dynamical system |
| CN109931066A (en) * | 2019-03-22 | 2019-06-25 | 中国煤炭科工集团太原研究院有限公司 | A kind of open pit slope mining system |
| CN110027867A (en) * | 2018-07-27 | 2019-07-19 | 中国煤炭科工集团太原研究院有限公司 | One kind can overlap swing type speedy drivage system sealing-tape machine self-movable foot end |
| CN111960057A (en) * | 2020-08-04 | 2020-11-20 | 霍州煤电集团吕梁山煤电有限公司方山店坪煤矿 | Sliding shoe type self-moving tail of fully mechanized excavation face |
| CN113356921A (en) * | 2021-05-31 | 2021-09-07 | 宁夏天地奔牛实业集团有限公司 | Mining integral type walking and strutting arrangement |
| CN113387141A (en) * | 2021-04-21 | 2021-09-14 | 太原理工大学 | Sectional type belt conveyor for unmanned working face and recycling method |
| CN113879796A (en) * | 2021-09-22 | 2022-01-04 | 中国煤炭科工集团太原研究院有限公司 | Stepping control method and device for self-moving tail and electronic equipment |
| CN113928821A (en) * | 2021-11-11 | 2022-01-14 | 山西金晖煤焦化工有限公司矿山装备分公司 | Tail moving structure of belt conveyor for tunneling |
| CN114056836A (en) * | 2021-11-12 | 2022-02-18 | 山西兰花机械制造有限公司 | Walking type self-moving tail for belt conveyor |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790998A (en) * | 2015-04-16 | 2015-07-22 | 中国煤炭科工集团太原研究院有限公司 | Stepping self-moving anchoring device of equipment train |
| CN105173604A (en) * | 2015-09-22 | 2015-12-23 | 中国煤炭科工集团太原研究院有限公司 | Self-advancing tail device of underground coal mine belt conveyor |
| CN105201552A (en) * | 2015-09-30 | 2015-12-30 | 中国煤炭科工集团太原研究院有限公司 | Train with reducing resistance moving mechanism for stepping self-moving tail |
| CN105201552B (en) * | 2015-09-30 | 2017-12-08 | 中国煤炭科工集团太原研究院有限公司 | A kind of self-movable foot end train of taking a step provided with Jiang Zu travel mechanisms |
| CN105971599A (en) * | 2016-05-11 | 2016-09-28 | 中国煤炭科工集团太原研究院有限公司 | Efficient and rapid tunneling system for coal roadway |
| CN106276058A (en) * | 2016-09-26 | 2017-01-04 | 原平市丰汇机械制造有限公司 | Flexible traveling, bending operating unicorn block belt feeder |
| CN106276058B (en) * | 2016-09-26 | 2022-11-15 | 原平市丰汇机械制造有限公司 | Bendable running and bending operation scale belt conveyor |
| CN110027867A (en) * | 2018-07-27 | 2019-07-19 | 中国煤炭科工集团太原研究院有限公司 | One kind can overlap swing type speedy drivage system sealing-tape machine self-movable foot end |
| CN110027867B (en) * | 2018-07-27 | 2021-01-29 | 中国煤炭科工集团太原研究院有限公司 | Lapping swing type self-moving tail of belt conveyor for rapid tunneling system |
| CN109720783A (en) * | 2018-12-05 | 2019-05-07 | 中国煤炭科工集团太原研究院有限公司 | A kind of flexible tape elevating conveyor dynamical system |
| CN109931066A (en) * | 2019-03-22 | 2019-06-25 | 中国煤炭科工集团太原研究院有限公司 | A kind of open pit slope mining system |
| CN111960057A (en) * | 2020-08-04 | 2020-11-20 | 霍州煤电集团吕梁山煤电有限公司方山店坪煤矿 | Sliding shoe type self-moving tail of fully mechanized excavation face |
| CN113387141A (en) * | 2021-04-21 | 2021-09-14 | 太原理工大学 | Sectional type belt conveyor for unmanned working face and recycling method |
| CN113356921A (en) * | 2021-05-31 | 2021-09-07 | 宁夏天地奔牛实业集团有限公司 | Mining integral type walking and strutting arrangement |
| CN113879796A (en) * | 2021-09-22 | 2022-01-04 | 中国煤炭科工集团太原研究院有限公司 | Stepping control method and device for self-moving tail and electronic equipment |
| CN113928821A (en) * | 2021-11-11 | 2022-01-14 | 山西金晖煤焦化工有限公司矿山装备分公司 | Tail moving structure of belt conveyor for tunneling |
| CN114056836A (en) * | 2021-11-12 | 2022-02-18 | 山西兰花机械制造有限公司 | Walking type self-moving tail for belt conveyor |
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