CN112791935A - High-efficient sorting unit in colliery based on big data - Google Patents

High-efficient sorting unit in colliery based on big data Download PDF

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Publication number
CN112791935A
CN112791935A CN202011526485.XA CN202011526485A CN112791935A CN 112791935 A CN112791935 A CN 112791935A CN 202011526485 A CN202011526485 A CN 202011526485A CN 112791935 A CN112791935 A CN 112791935A
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CN
China
Prior art keywords
screening
coal
material receiving
device body
plate
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Pending
Application number
CN202011526485.XA
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Chinese (zh)
Inventor
陈伟
崔希国
刘长富
陆永生
杨小栋
李立媛
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Linyi Mining Group Co Ltd
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Linyi Mining Group Co Ltd
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 Linyi Mining Group Co Ltd filed Critical Linyi Mining Group Co Ltd
Priority to CN202011526485.XA priority Critical patent/CN112791935A/en
Publication of CN112791935A publication Critical patent/CN112791935A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

Abstract

The invention is suitable for the technical field of coal-carbon screening and separating, and provides a coal mine high-efficiency sorting device based on big data, which comprises a device body, wherein the upper part of the device body is provided with a material receiving system, a screening system and a control system are arranged in the device body, and the screening system is connected with a driving system; the material receiving system comprises a material receiving hopper, the upper part of the material receiving hopper is fixedly connected to the device body, two sides of the lower part of the material receiving hopper are respectively connected with fixed connection plates, and the fixed connection plates are symmetrically arranged and fixedly connected to the device body; the lower end of the receiving hopper is connected with a flexible cylinder, and the lower end of the flexible cylinder is connected with a discharging cylinder; the bottoms of the two fixed connection plates are respectively provided with a first sliding groove, and the two first sliding grooves are respectively and movably connected with a guide rod group. Therefore, the screening device can carry out screening work only by vibrating the screening unit when the whole device works, the service life of the device is prolonged, the screening efficiency is improved, the screening process is shortened, the length of a screen in a screening system is shortened, and materials are saved.

Description

High-efficient sorting unit in colliery based on big data
Technical Field
The invention relates to the technical field of coal carbon screening and separation, in particular to a coal mine efficient sorting device based on big data.
Background
With the great progress of independent innovation research of intelligent coal mining technology and equipment in China, the device has good application effect in the coal mine production process, and the production automation and the unmanned production are preliminarily realized in many stages of coal production. Meanwhile, the intelligent high-yield high-efficiency coal mine provides higher requirements for a coal mine processing system, the efficiency of the coal mine processing system is higher, related operators are fewer, the informatization capacity is stronger, the coal mine needs to be screened before the coal is processed, so that a screening device is needed, the existing coal mine screening device is used, firstly, in the screening process of the coal, the whole device vibrates, the service life of the screening device is shortened, secondly, the screening process needs a longer sieve to screen the coal, materials are wasted, and the coal mine screening device is not environment-friendly.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
Aiming at the defects, the invention aims to provide the coal mine efficient sorting device based on the big data, which is simple in structure and reliable in design, so that the whole device can be used for screening only by vibrating the screening unit when in work, the service life of the device is prolonged, the screening efficiency is improved, the screening process is shortened, the length of a screen in a screening system is shortened, and materials are saved.
In order to achieve the purpose, the invention provides a coal mine high-efficiency sorting device based on big data, which comprises a device body, wherein a material receiving system is arranged at the upper part of the device body, a screening system and a control system are arranged in the device body, and the screening system is connected with a driving system.
The material receiving system comprises a material receiving hopper, the upper part of the material receiving hopper is fixedly connected to the device body, two sides of the lower part of the material receiving hopper are respectively connected with fixed connection plates, and the fixed connection plates are symmetrically arranged and fixedly connected to the device body; the lower end of the receiving hopper is connected with a flexible cylinder, and the lower end of the flexible cylinder is connected with a discharging cylinder; the bottom of each fixed connecting plate is provided with a first sliding groove, one end of each guide rod group is connected in each first sliding groove, and the other end of each guide rod group is fixedly connected with the discharge cylinder.
The screening system comprises a plurality of screening units, each screening unit comprises a screen, fixing plates are arranged on four sides of the screen, first coal blocking plates are arranged on the upper portions of the fixing plates on two side edges of the screen, a plurality of supports are arranged on the lower portions of the fixing plates on the two side edges of the screen, coal screening rollers are movably connected to the bottoms of the supports, the coal screening rollers are movably connected into grooves, and the grooves are fixedly connected to the device body; a second coal baffle and a discharge plate are respectively arranged on the fixed plates on the two remaining sides of the sieve, the sieve and the groove are obliquely arranged, the second coal baffle is positioned at the upper end of the sieve, and the discharge plate is positioned at the lower end of the sieve;
according to the coal mine efficient sorting device based on the big data, the driving system comprises a first shaft movably connected with the second coal baffle, the first shaft is movably connected with a second shaft, the second shaft is movably connected with an eccentric boss on a first rotating wheel, and the first rotating wheel is fixedly connected with a first motor.
According to the coal mine efficient sorting device based on the big data, the device body comprises a screening box and a driving box which are connected with each other, the screening box and the driving box are separated through a baffle, and the screening box and the driving box have a common bottom plate; the screening system is located in the screening box, and the driving system is located in the driving box.
According to the coal mine efficient sorting device based on the big data, the sorting box comprises a top plate which is horizontally arranged, two side edges of the top plate are fixedly connected with the top ends of a first side plate and a second side plate respectively, the first side plate and the second side plate are vertically arranged and are parallel to each other, one side edges of the first side plate and the second side plate are connected with the baffle, the other side edges of the first side plate and the second side plate are fixedly connected with the front panel, and the material receiving system is located on the top plate.
According to the coal mine efficient sorting device based on the big data, the two guide rod groups respectively comprise first sliding blocks movably connected inside the two first sliding grooves, the bottoms of the two first sliding blocks are respectively connected with the vertically arranged first guide rods, the bottoms of the two first guide rods are respectively connected with the horizontally arranged second guide rods, and the two second guide rods are respectively fixedly connected with the discharging barrel.
According to the coal mine efficient sorting device based on the big data, the first sliding block is provided with the roller, and the roller is located at the contact part of the first sliding block and the first sliding groove.
According to the coal mine efficient sorting device based on the big data, the rotary wheel is arranged in the material receiving hopper.
According to the coal mine efficient sorting device based on the big data, the water passages are formed in the two fixing and connecting plates, water pipes are arranged in the water passages, one ends of the water pipes are connected with the water tank, and the other ends of the water pipes penetrate through the fixing and connecting plates downwards and then are connected with the spraying heads.
According to the coal mine efficient sorting device based on the big data, the screening system comprises two screening units, the second screening unit is provided with a second rotating wheel, and a transmission part is arranged between the first rotating wheel and the second rotating wheel.
According to the coal mine efficient sorting device based on the big data, the bottom of the screening unit is provided with the material receiving box, and the material receiving box is located on the bottom plate.
The invention aims to provide a coal mine high-efficiency sorting device based on big data, and the coal mine high-efficiency sorting device is provided with a driving system and a screening system, has a simple structure, can carry out screening work only by vibrating a screening unit when the whole device works, and avoids the damage to a device body caused by the vibration of the whole device; through setting up the material receiving system, improved screening efficiency, shortened the screening process, then shortened the length of sieve in the screening system, save the material. In conclusion, the beneficial effects of the invention are as follows: simple structure, the design is reliable, makes whole device during operation only need sieve the unit vibrations alright screening work, and extension device's life has improved screening efficiency, has subtracted the weak point screening process, then subtracts the length of short sieve in the weak point screening system, saves the material.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a guide bar set;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic top view of the rotor;
FIG. 5 is a schematic front view of a screening unit;
FIG. 6 is a schematic left side view of the structure of FIG. 5;
FIG. 7 is a schematic top view of the structure of FIG. 6;
in the figure: 1-device body, 11-screening box, 111-top plate, 112-first side plate, 113-second side plate, 114-front plate; 12-drive box, 13-baffle, 14-fixed joint plate, 141-water passage, 142-first chute, 143-drive piece, 144-sprinkler head, 145-water tank; 15-a base plate; 2-a material receiving system, 21-a material receiving hopper, 22-a flexible cylinder, 23-a material discharging cylinder and 24-a rotating wheel; 251-a first guide bar, 252-a second guide bar, 253-a first slider, 254-a roller; 3-screening system, 31-screen, 311-first coal baffle, 312-second coal baffle, 313-discharge plate, 32-fixing plate, 33-support, 34-screening coal roller, 35-groove, 4-material receiving box, 5-control system, 6-driving system, 61-first motor, 62-first rotating wheel, 63-eccentric boss, 641-second shaft and 642-first shaft; 65-transmission member, 66-second wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the invention provides a coal mine efficient sorting device based on big data, which comprises a device body 1, wherein a material receiving system 2 is arranged at the upper part of the device body 1, a screening system 3 and a control system 5 are arranged inside the device body 1, and the screening system 3 is connected with a driving system 6.
Referring to fig. 1 and 6, the device body 1 comprises a screening box 11 and a driving box 12 which are connected with each other, the screening box 11 and the driving box 12 are separated by a baffle 13, and the screening box 11 and the driving box 12 have a common bottom plate 15; the screening system 3 is positioned in the screening box 11, and the driving system 6 is positioned in the driving box 12; the screening box 11 comprises a top plate 111 which is horizontally arranged, two side edges of the top plate 111 are fixedly connected with the top ends of a first side plate 112 and a second side plate 113 respectively, the first side plate 112 and the second side plate 113 are vertically arranged and are parallel to each other, one side edge of the first side plate 112 and one side edge of the second side plate 113 are connected with a baffle 13, the other side edge of the first side plate 112 and the other side edge of the second side plate 113 are fixedly connected with a front panel 114, and the material receiving system 2 is located on the top plate 111.
Referring to fig. 2 and 3, the receiving system 2 includes a receiving hopper 21, the upper portion of the receiving hopper 21 is fixedly connected to the top plate 111, the lower portion of the receiving hopper 21 is fixedly connected to the fixed connection plates 14, two fixed connection plates 14 are symmetrically arranged, one of the fixed connection plates 14 is fixedly connected to the first side plate 112, the other fixed connection plate 14 is fixedly connected to the second side plate 113, the fixed connection plates 14 can make the receiving hopper 21 more stable, and the receiving hopper 21 is prevented from shaking due to the impact force of falling coal; the lower part of the receiving hopper 21 is connected with a flexible cylinder 22, the lower part of the flexible cylinder 22 is connected with a discharging cylinder 23, and the discharging cylinder 23 can be moved to any horizontal direction by the flexible cylinder 22; the bottoms of the two fixing plates 14 are respectively provided with a first chute 142, the two first chutes 142 are respectively and movably connected with a guide rod group, the two guide rod groups respectively comprise a first slide block 253 movably connected inside the two first chutes 142, the first slide block 253 is provided with a roller 254, the roller 254 is positioned at the contact part of the first slide block 253 and the first chute 142, the roller 254 can reduce the friction of the contact part of the first slide block 253 and the first chute 142, so that the first slide block 253 can move more flexibly in the first chute 142, the bottoms of the two first slide blocks 253 are respectively connected with a vertically arranged first guide rod 251, the bottoms of the two first guide rods 251 are respectively connected with a horizontally arranged second guide rod 252, the two second guide rods 252 are respectively and fixedly connected with the discharging barrel 23, the guide rod groups can drive the discharging barrel 23 to move along the first chute 142 under the driving of the driving piece 143, so that coal flowing out from the discharging barrel 23 can be uniformly dispersed in the screening system 3, prevent that coal from piling up at screening system 3 internal fixation position, improved screening efficiency, shortened the screening process, the screening process is shortened and can be shortened the length of sieve 31 in screening system 3, saves the material. The driving members 143 are located in the first sliding groove 142 and are fixedly connected to the first guide rod 251, the number of the driving members 143 may be 1 or 2, preferably, 1 driving member 143 is selected in the present invention, and the driving member 143 is an air cylinder.
Referring to fig. 4, further, in order to make the coal smoothly pass through the receiving system 2 without blockage, a rotating wheel 24 is arranged in the receiving hopper 21, the coal falls and then impacts the rotating wheel 24 to rotate, and the rotating wheel 24 rotates to drive the coal falling between the impellers of the rotating wheel 24 to fall.
Referring to fig. 2, further, a water passage 141 is provided inside the two fixing connection plates 14, a water pipe is provided in the water passage 141, one end of the water pipe is connected with the water tank 145, and the other end of the water pipe penetrates through the fixing connection plate 14 downwards and then is connected with the sprinkler head 144, so that the water mist sprayed by the sprinkler head 144 can reduce coal ash generated by coal falling.
Referring to fig. 5 to 7, the screening system 3 includes a plurality of screening units, the bottom of each screening unit is provided with a material receiving box 4, the material receiving box 4 is located on a bottom plate 15, and the material receiving box 4 receives coal screened by the screening units so that vibration is not needed; the screening unit comprises a screen 31, fixing plates 32 are arranged on four sides of the screen 31, first coal blocking plates 311 are arranged on the upper portions of the fixing plates 32 on two side edges of the screen 31, a plurality of supporting seats 33 are arranged on the lower portions of the fixing plates 32 on two side edges of the screen 31, coal screening rollers 34 are movably connected to the bottoms of the supporting seats 33, the coal screening rollers 34 are movably connected into grooves 35, and the grooves 35 are fixedly connected to the device body 1; be equipped with second coal board 312 and play flitch 313 on the fixed plate 32 on the remaining both sides of sieve 31 respectively, in order to make coal screening quick high-efficient more, and can make the automatic discharge of the coal that sieves, sieve 31 and recess 35 all incline and place, second coal board 312 is located the upper end of sieve 31 this moment, it is located the lower extreme of sieve 31 to go out flitch 313, it will sieve the coal output after front panel 114 to go out flitch 313, second coal board 312 is connected with actuating system 6.
Referring to fig. 6 and 7, the driving system 6 includes a first shaft 642 movably connected to the second coal blocking plate 312, the first shaft 642 penetrates through the blocking plate 13 and is movably connected to a second shaft 641, the blocking plate 13 does not affect the movement of the first shaft 642 and the second shaft 641, the second shaft 641 is movably connected to an eccentric boss 63 on the first rotating wheel 62, the first rotating wheel 62 is fixedly connected to the first motor 61, the motor drives the first rotating wheel 62 to rotate, the eccentric boss 63 on the first rotating wheel 62 drives the second shaft 641 to move, and the second shaft 641 drives the first shaft 642 to reciprocate, so as to drive the screen 31 to reciprocate in the groove 35, thereby screening the coal on the screen 31. Only need the screening unit like this to shake screening work, need not whole device and shake, can prolong the life of device to screening system 3 is separated with actuating system 6, can protect actuating system 6, prevents that the dust from entering into and producing the destruction to the system in the actuating system.
The skilled person can select a suitable number of screening units as required, the screening system 3 of the present invention comprises 2 screening units, and can screen coal into 3 specifications, the second screening unit is provided with a second rotating wheel 66, the first rotating wheel 62 is connected with the second rotating wheel 66 through a transmission member 65, so that the rotation of the first rotating wheel 62 drives the second rotating wheel 66 to rotate, thereby the second rotating wheel 66 drives the second screening unit to vibrate, preferably, the transmission member 65 is a belt.
The control system 5 is located in the driving box 12, the control system 5 is electrically connected with the material receiving system 2, the screening system 3 and the driving system 6, the control device works integrally, and after a program is adjusted for the device, the device can automatically screen coal without being watched by people.
The working principle of the invention is as follows:
coal flows in from the receiving hopper 21 and flows out from the discharging barrel 23, and then is uniformly scattered in the screening system 3 under the driving of the guide rod group, meanwhile, the water mist sprayed by the spraying heads 144 reduces coal ash generated by falling coal, and the screening system 3 is driven by the driving system 6 to vibrate to screen coal.
In conclusion, the screening device is simple in structure due to the fact that the driving system and the screening system are arranged, screening can be conducted only by the aid of vibration of the screening unit when the whole screening device works, and damage to a device body caused by vibration of the whole screening device is avoided; through setting up the material receiving system, improved screening efficiency, shortened the screening process, then shortened the length of sieve in the screening system, save the material. The invention has the beneficial effects that: simple structure, the design is reliable, makes whole device during operation only need sieve the unit vibrations alright screening work, and extension device's life has improved screening efficiency, has subtracted the weak point screening process, then subtracts the length of short sieve in the weak point screening system, saves the material.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. The coal mine efficient sorting device based on the big data is characterized by comprising a device body, wherein a material receiving system is arranged at the upper part of the device body, a screening system and a control system are arranged inside the device body, and the screening system is connected with a driving system;
the material receiving system comprises a material receiving hopper, the upper part of the material receiving hopper is fixedly connected to the device body, two sides of the lower part of the material receiving hopper are respectively connected with fixed connection plates, and the fixed connection plates are symmetrically arranged and fixedly connected to the device body; the lower end of the receiving hopper is connected with a flexible cylinder, and the lower end of the flexible cylinder is connected with a discharging cylinder; the bottoms of the two fixing and connecting plates are respectively provided with a first sliding chute, one end of a guide rod group is connected in each first sliding chute, and the other end of the guide rod group is fixedly connected with the discharging barrel;
the screening system comprises a plurality of screening units, each screening unit comprises a screen, fixing plates are arranged on four sides of the screen, first coal blocking plates are arranged on the upper portions of the fixing plates on two side edges of the screen, a plurality of supports are arranged on the lower portions of the fixing plates on the two side edges of the screen, coal screening rollers are movably connected to the bottoms of the supports, the coal screening rollers are movably connected into grooves, and the grooves are fixedly connected to the device body; and a second coal blocking plate and a discharging plate are respectively arranged on the fixed plates on the two remaining sides of the sieve, the sieve and the groove are obliquely arranged, the second coal blocking plate is positioned at the upper end of the sieve, and the discharging plate is positioned at the lower end of the sieve.
2. The big-data-based coal mine efficient sorting device according to claim 1, wherein the driving system comprises a first shaft movably connected with the second coal baffle, the first shaft is movably connected with a second shaft, the second shaft is movably connected with an eccentric boss on a first rotating wheel, and the first rotating wheel is fixedly connected with a first motor.
3. The high-efficiency big data-based sorting device for the coal mines as claimed in claim 1, wherein the device body comprises a screening box and a driving box which are connected with each other, the screening box and the driving box are separated by a baffle plate, and the screening box and the driving box have a common bottom plate; the screening system is located in the screening box, and the driving system is located in the driving box.
4. The coal mine high-efficiency sorting device based on the big data as claimed in claim 3, wherein the screening box comprises a top plate which is horizontally arranged, two side edges of the top plate are fixedly connected with the top ends of a first side plate and a second side plate respectively, the first side plate and the second side plate are vertically arranged and are parallel to each other, one side edges of the first side plate and the second side plate are connected with the baffle, the other side edges of the first side plate and the second side plate are fixedly connected with a front panel, and the material receiving system is located on the top plate.
5. The coal mine high-efficiency sorting device based on the big data as claimed in claim 1, wherein each of the two guide rod groups comprises a first slide block movably connected inside the two first sliding grooves, the bottoms of the two first slide blocks are connected with vertically arranged first guide rods, the bottoms of the two first guide rods are connected with horizontally arranged second guide rods, and the two second guide rods are fixedly connected with the discharge cylinder.
6. The efficient big data-based coal mine sorting device as claimed in claim 5, wherein the first sliding block is provided with a roller, and the roller is located at a contact position of the first sliding block and the first sliding chute.
7. The big-data-based coal mine efficient sorting device according to claim 1, wherein a rotating wheel is arranged in the receiving hopper.
8. The coal mine efficient sorting device based on the big data as claimed in claim 1, wherein a water passage is arranged inside each of the two fixing plates, a water pipe is arranged in each water passage, one end of each water pipe is connected with a water tank, and the other end of each water pipe penetrates through the fixing plates downwards and then is connected with a spraying head.
9. The high-efficiency big data-based coal mine sorting device according to claim 1, wherein the screening system comprises two screening units, the second screening unit is provided with a second rotating wheel, and a transmission part is arranged between the first rotating wheel and the second rotating wheel.
10. The big-data-based coal mine high-efficiency sorting device is characterized in that a material receiving box is arranged at the bottom of the screening unit and is located on the bottom plate.
CN202011526485.XA 2020-12-22 2020-12-22 High-efficient sorting unit in colliery based on big data Pending CN112791935A (en)

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CN202011526485.XA CN112791935A (en) 2020-12-22 2020-12-22 High-efficient sorting unit in colliery based on big data

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Application Number Priority Date Filing Date Title
CN202011526485.XA CN112791935A (en) 2020-12-22 2020-12-22 High-efficient sorting unit in colliery based on big data

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CN112791935A true CN112791935A (en) 2021-05-14

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CN209349032U (en) * 2019-01-22 2019-09-06 河南鸿丰新型建材有限公司 Drum-type rubble sub-sieve device
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CN210847117U (en) * 2019-10-08 2020-06-26 东港市正宇食品厂 Small shellfish sorting machine
CN211613374U (en) * 2019-12-23 2020-10-02 魏小锋 Coal mine screening equipment for coal mining
CN211683369U (en) * 2019-12-23 2020-10-16 浩清先进新材料(嘉兴)有限公司 Plastics production is with extruder that has screening function
CN112058619A (en) * 2020-08-31 2020-12-11 张和昆 Mining high-efficient dust removal based on environmental protection is carried and is filtered integrated device

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Application publication date: 20210514