CN111879549A - Unbalanced sampling analysis system for deep coal mine safety early warning - Google Patents

Unbalanced sampling analysis system for deep coal mine safety early warning Download PDF

Info

Publication number
CN111879549A
CN111879549A CN202010745462.1A CN202010745462A CN111879549A CN 111879549 A CN111879549 A CN 111879549A CN 202010745462 A CN202010745462 A CN 202010745462A CN 111879549 A CN111879549 A CN 111879549A
Authority
CN
China
Prior art keywords
support
gear
motor
plate
coal mine
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.)
Pending
Application number
CN202010745462.1A
Other languages
Chinese (zh)
Inventor
朱俊奇
杨力
程元栋
杨雪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui University of Science and Technology
Original Assignee
Anhui University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui University of Science and Technology filed Critical Anhui University of Science and Technology
Priority to CN202010745462.1A priority Critical patent/CN111879549A/en
Priority to NL2026314A priority patent/NL2026314B1/en
Publication of CN111879549A publication Critical patent/CN111879549A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B07B1/24—Revolving drums with fixed or moving interior agitators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
    • B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/34—Applications of driving gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk
    • B65G2201/045—Sand, soil and mineral ore

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses an unbalanced sampling analysis system for deep coal mine safety early warning, which comprises a moving assembly and is characterized in that the moving assembly comprises a rotating plate, a support and a pushing assembly are arranged on the rotating plate, the support comprises a first support, a screening assembly is arranged above the first support, a material collecting assembly is arranged on one side of the pushing assembly, and a spiral conveying assembly is arranged on one side of the first support. The invention adopts rail sliding, is suitable for the rail of the raw mine, can rotate the sampling system for sampling, has large working range, simple and quick sampling and feeding, high working efficiency, good screening effect and uniform material distribution by using rolling screening, and is more accurate in subsequent analysis.

Description

Unbalanced sampling analysis system for deep coal mine safety early warning
Technical Field
The invention relates to the field of safety early warning, in particular to an unbalanced sampling analysis system for deep coal mine safety early warning.
Background
Coal mines are generally divided into miners and opencast coal mines. When the coal bed is far from the ground surface, a tunnel is usually dug into the ground to mine coal, which is the main solid fuel and one of combustible organic rocks. Deep colliery need constantly change the direction when the excavation, avoids the underground geology unbalanced, leads to the landslide to appear, to this kind of condition, provides an unbalanced sampling analytic system that is used for deep colliery safety precaution now.
Disclosure of Invention
The invention aims to provide an unbalanced sampling analysis system for deep coal mine safety early warning, the sampling analysis system adopts rail sliding and is suitable for a raw mine rail, the sampling system can rotate for sampling, the working range is large, the sampling and feeding are simple and quick, the working efficiency is high, the rolling screening is used, the screening effect is good, the material distribution is uniform, and the subsequent analysis is more accurate.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an unbalanced sampling analytic system for deep colliery safety precaution includes removes the subassembly, remove the subassembly and include the rotor plate, be equipped with support and promotion subassembly on the rotor plate, the support includes first support, and first support top is equipped with the screening subassembly, promotes subassembly one side and is equipped with the material subassembly of adopting, and first support one side is equipped with the spiral delivery subassembly.
Further, the moving assembly comprises a moving plate, track wheels distributed in an array mode are arranged below the moving plate, a rotating plate is arranged above the moving plate, a first motor is arranged on the rotating plate, a first gear is arranged below the first motor, a second gear and an annular bearing are arranged between the moving plate and the rotating plate, and the first gear is meshed with the second gear.
Further, a second motor is arranged above the first support, a third gear is arranged on one side of the second motor, a first inclined plate, a second inclined plate and a third inclined plate are further arranged above the first support, a second support is arranged on one side of the first support, and three sampling storage barrels are arranged on the second support.
Further, the screening subassembly includes the third support, is equipped with first pivot in the third support, is equipped with the fourth gear on the first pivot, fourth gear and third gear meshing, fourth gear one side is equipped with the screening bucket, be equipped with axial distribution on the screening bucket, and the interval is crescent first connecting axle, second connecting axle and third connecting axle, screening bucket one side is equipped with the fourth support, be equipped with the second pivot in the fourth support, be equipped with first helical blade in the screening bucket, the third support passes through axial distribution's connecting rod fixed connection with the fourth support.
Furthermore, the material collecting assembly comprises a material collecting box, one end of the material collecting box is provided with a first rotating plate and a second rotating plate which are distributed in an array mode, two sides of the material collecting box are provided with first rollers distributed in a mirror mode, one side of each first roller is provided with a third motor, the other end of the material collecting box is provided with a second roller, and one side of each second roller is provided with a fourth motor.
Further, promote the subassembly including removing the axle, remove epaxial rack that is equipped with, remove an one end and be equipped with the third and change the board, remove the epaxial fixing base that is equipped with the array distribution, remove axle and fixing base sliding fit, remove axle one side and be equipped with the fifth motor, fifth motor one side is equipped with the fifth gear, the fifth gear and rack meshing, remove the epaxial side and be equipped with the seventh support, the third changes the board and passes through screw normal running fit with first board, the seventh support changes board normal running fit with the second.
Further, the spiral conveying assembly comprises a conveying cover, a discharge hole is formed in one side of the conveying cover, a second rotary blade is arranged in the conveying cover, a sixth motor is arranged at one end of the second rotary blade, and the sixth motor drives the second rotary blade to rotate.
The invention has the beneficial effects that:
1. the invention adopts rail sliding, is suitable for the rail of the raw mine, can rotate the sampling system to sample, and has large working range;
2. the invention has the advantages of simple and rapid sampling and feeding, high working efficiency, good screening effect and uniform material distribution by using rolling screening, and is more accurate in subsequent analysis.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a sampling analysis system according to the present invention;
FIG. 2 is a schematic diagram of a portion of the present invention;
FIG. 3 is a schematic diagram of a portion of the present invention;
FIG. 4 is a schematic diagram of a portion of the present invention;
FIG. 5 is a schematic view of a portion of the present invention;
FIG. 6 is a schematic diagram of a portion of the present invention;
FIG. 7 is a schematic view of a portion of the present invention;
fig. 8 is a partial structural schematic of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
The utility model provides an unbalanced sampling analytic system for deep colliery safety precaution includes removes subassembly 1, as shown in fig. 1, removes subassembly 1 and includes rotor plate 12, is equipped with support 2 and promotion subassembly 5 on rotor plate 12, and support 2 includes first support 21, and first support 21 top is equipped with screening subassembly 3, and promotion subassembly 5 one side is equipped with adopts material subassembly 4, and first support 21 one side is equipped with spiral delivery subassembly 6.
The moving assembly 1 includes a moving plate 11, as shown in fig. 2, track wheels 111 distributed in an array are arranged below the moving plate 11, a rotating plate 12 is arranged above the moving plate 11, a first motor 13 is arranged on the rotating plate 12, a first gear 131 is arranged below the first motor 13, a second gear 14 and an annular bearing 15 are arranged between the moving plate 11 and the rotating plate 12, and the first gear 131 and the second gear 14 are meshed.
The second motor 22 is disposed above the first support 21, as shown in fig. 3 and 4, a third gear 221 is disposed on one side of the second motor 22, a first inclined plate 23, a second inclined plate 24 and a third inclined plate 25 are further disposed above the first support 21, a second support 26 is disposed on one side of the first support 21, and three sampling storage barrels 261 are disposed on the second support 26.
The screening component 3 includes a third support 31, as shown in fig. 3 and 5, a first rotating shaft 311 is arranged in the third support 31, a fourth gear 32 is arranged on the first rotating shaft 311, the fourth gear 32 is engaged with the third gear 221, a screening barrel 33 is arranged on one side of the fourth gear 32, axial distribution is arranged on the screening barrel 33, a first connecting shaft 331 with gradually increasing space is arranged on the screening barrel 33, a second connecting shaft 332 and a third connecting shaft 333 are arranged on one side of the screening barrel 33, a fourth support 34 is arranged in the fourth support 34, a second rotating shaft 341 is arranged in the screening barrel 33, a first helical blade 35 is arranged in the screening barrel 33, and the third support 31 is fixedly connected with the fourth support 34 through connecting rods 36 which are axially distributed.
The material collecting assembly 4 comprises a material collecting box 41, as shown in fig. 6, one end of the material collecting box 41 is provided with a first rotating plate 411 and second rotating plates 412 distributed in an array, two sides of the material collecting box 41 are provided with first rollers 42 distributed in a mirror image manner, one side of each first roller 42 is provided with a third motor 421, the other end of the material collecting box 41 is provided with a second roller 43, and one side of each second roller 43 is provided with a fourth motor 431.
The pushing assembly 5 includes a moving shaft 51, as shown in fig. 7, a rack 511 is disposed on the moving shaft 51, a third rotating plate 512 is disposed at one end of the moving shaft 51, fixing seats 52 distributed in an array are disposed on the moving shaft 51, the moving shaft 51 is in sliding fit with the fixing seats 52, a fifth motor 53 is disposed on one side of the moving shaft 51, a fifth gear 531 is disposed on one side of the fifth motor 53, the fifth gear 531 is meshed with the rack 511, a seventh support 54 is disposed above the moving shaft 51, the third rotating plate 512 is in rotational fit with the first rotating plate 411 through screws, and the seventh support 54 is in rotational fit with the second rotating plate 412.
The spiral conveying assembly 6 includes a conveying cover 61, as shown in fig. 8, a discharge hole 611 is formed in one side of the conveying cover 61, a second rotating blade 62 is arranged in the conveying cover 61, a sixth motor 63 is arranged at one end of the second rotating blade 62, and the sixth motor 63 drives the second rotating blade 62 to rotate.
During the use, rotor plate 12 rotates, and first cylinder 42 and second cylinder 43 start to carry out the coal mine sampling, and the sampling coal mine gets into sampling case 41, removes axle 51 and promotes sampling case 41 slope, and spiral delivery subassembly 6 starts to carry the coal mine to screening subassembly 3 in, and screening bucket 33 rotates and sieves, and the coal of sampling finally gets into and carries out manual analysis in the sampling storage barrel 261.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims (7)

1. The utility model provides an unbalanced sampling analytic system for deep colliery safety precaution includes removal subassembly (1), its characterized in that, removal subassembly (1) includes rotor plate (12), is equipped with support (2) and promotion subassembly (5) on rotor plate (12), and support (2) include first support (21), and first support (21) top is equipped with screening subassembly (3), and promotion subassembly (5) one side is equipped with adopts material subassembly (4), and first support (21) one side is equipped with spiral delivery subassembly (6).
2. The imbalance sampling analysis system for deep coal mine safety early warning according to claim 1, characterized in that the moving assembly (1) comprises a moving plate (11), rail wheels (111) distributed in an array are arranged below the moving plate (11), a rotating plate (12) is arranged above the moving plate (11), a first motor (13) is arranged on the rotating plate (12), a first gear (131) is arranged below the first motor (13), a second gear (14) and an annular bearing (15) are arranged between the moving plate (11) and the rotating plate (12), and the first gear (131) and the second gear (14) are meshed.
3. The imbalance sampling analysis system for the deep coal mine safety precaution according to claim 1, characterized in that a second motor (22) is arranged above the first support (21), a third gear (221) is arranged on one side of the second motor (22), a first inclined plate (23), a second inclined plate (24) and a third inclined plate (25) are further arranged above the first support (21), a second support (26) is arranged on one side of the first support (21), and three sampling storage barrels (261) are arranged on the second support (26).
4. The unbalanced sampling analysis system for deep coal mine safety precaution of claim 1, it is characterized in that the screening component (3) comprises a third support (31), a first rotating shaft (311) is arranged in the third support (31), a fourth gear (32) is arranged on the first rotating shaft (311), the fourth gear (32) is meshed with the third gear (221), a screening barrel (33) is arranged on one side of the fourth gear (32), the screening barrel (33) is axially distributed, and the interval is first connecting axle (331) that the increase gradually, second connecting axle (332) and third connecting axle (333), screening bucket (33) one side is equipped with fourth support (34), is equipped with second pivot (341) in fourth support (34), is equipped with first helical blade (35) in screening bucket (33), and third support (31) and fourth support (34) are through connecting rod (36) fixed connection of axial distribution.
5. The unbalanced sampling analysis system for the deep coal mine safety precaution according to claim 1, characterized in that the material collecting component (4) comprises a material collecting box (41), one end of the material collecting box (41) is provided with a first rotating plate (411) and second rotating plates (412) distributed in an array, two sides of the material collecting box (41) are provided with first rollers (42) distributed in a mirror image manner, one side of the first rollers (42) is provided with a third motor (421), the other end of the material collecting box (41) is provided with a second roller (43), and one side of the second roller (43) is provided with a fourth motor (431).
6. The unbalanced sampling analysis system for the deep coal mine safety precaution of claim 1, wherein the pushing assembly (5) comprises a moving shaft (51), a rack (511) is arranged on the moving shaft (51), a third rotating plate (512) is arranged at one end of the moving shaft (51), fixed seats (52) distributed in an array are arranged on the moving shaft (51), the moving shaft (51) is in sliding fit with the fixed seats (52), a fifth motor (53) is arranged on one side of the moving shaft (51), a fifth gear (531) is arranged on one side of the fifth motor (53), the fifth gear (531) is meshed with the rack (511), a seventh support (54) is arranged above the moving shaft (51), the third rotating plate (512) is in rotating fit with the first rotating plate (411) through a screw, and the seventh support (54) is in rotating fit with the second rotating plate (412).
7. The imbalance sampling analysis system for deep coal mine safety early warning according to claim 1, wherein the spiral conveying assembly (6) comprises a conveying cover (61), a discharge hole (611) is formed in one side of the conveying cover (61), a second rotary blade (62) is arranged in the conveying cover (61), a sixth motor (63) is arranged at one end of the second rotary blade (62), and the sixth motor (63) drives the second rotary blade (62) to rotate.
CN202010745462.1A 2020-07-29 2020-07-29 Unbalanced sampling analysis system for deep coal mine safety early warning Pending CN111879549A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010745462.1A CN111879549A (en) 2020-07-29 2020-07-29 Unbalanced sampling analysis system for deep coal mine safety early warning
NL2026314A NL2026314B1 (en) 2020-07-29 2020-08-20 Unbalance sampling and analyzing system for safety early warning of deep coal mine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010745462.1A CN111879549A (en) 2020-07-29 2020-07-29 Unbalanced sampling analysis system for deep coal mine safety early warning

Publications (1)

Publication Number Publication Date
CN111879549A true CN111879549A (en) 2020-11-03

Family

ID=73201385

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010745462.1A Pending CN111879549A (en) 2020-07-29 2020-07-29 Unbalanced sampling analysis system for deep coal mine safety early warning

Country Status (2)

Country Link
CN (1) CN111879549A (en)
NL (1) NL2026314B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2392768B1 (en) * 2010-06-07 2013-08-28 Siemens Aktiengesellschaft Method and device for increasing the yield from a mineral deposit
CN108554768A (en) * 2018-05-07 2018-09-21 新乡市东振机械制造有限公司 A kind of building waste screening drum
CN111302161B (en) * 2018-11-20 2021-08-27 高月民 Cable winding control method for fully mechanized coal mining face under coal mine
CN111451152A (en) * 2020-04-13 2020-07-28 青岛理工大学 Conveying and screening device, spiral pushing type peanut kernel grader and method thereof

Also Published As

Publication number Publication date
NL2026314B1 (en) 2022-06-03
NL2026314A (en) 2022-03-21

Similar Documents

Publication Publication Date Title
CN112943088B (en) Lithotripsy stratum engineering reconnaissance probing construction is with probing drill bit
CN108832031A (en) A kind of new-energy automobile battery case
CN111879549A (en) Unbalanced sampling analysis system for deep coal mine safety early warning
CN209901351U (en) A raw ore crushing apparatus for coal mining
CN201529574U (en) Horizontal screw unloading settling centrifuge
CN106150513A (en) A kind of shield body anti-rolling type rock tunnel(ling) machine
CN211085729U (en) Novel sand ware is got in ground reconnaissance
CN211109513U (en) Electromechanical transportation transmission in colliery
CN211864860U (en) Biomass high polymer material stirring equipment
CN221144438U (en) Shield constructs quick-witted tunnelling stabilising arrangement
CN216111241U (en) Mine hole accumulated water drainage device for coal mining
CN203879495U (en) Cutting mechanism and development machine
CN219520406U (en) Casting is with high-efficient sand mixer
CN217516074U (en) Feeding device is used in environmental protection material production
CN216538693U (en) Coal mine collecting device in coal mining
CN220351151U (en) Mine mining conveyor
CN215389816U (en) Garbage truck with crushing function
CN220160183U (en) Coal mining processing apparatus
CN221108448U (en) High efficiency breaker is used in colliery exploitation
CN109969706A (en) A kind of coal industry field coal crushing conveying device
CN210221562U (en) Novel geotechnical engineering reconnaissance sampler
CN215507207U (en) Screw pump with crushing device
CN212177192U (en) Safety pillar for coal mine
CN218531192U (en) A conveyer for coal mining uses
CN219238370U (en) Mining belt type reversed loader

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20201103

WD01 Invention patent application deemed withdrawn after publication