CN111558444A - Ore selective crushing device for underground belt middle section - Google Patents
Ore selective crushing device for underground belt middle section Download PDFInfo
- Publication number
- CN111558444A CN111558444A CN202010472560.2A CN202010472560A CN111558444A CN 111558444 A CN111558444 A CN 111558444A CN 202010472560 A CN202010472560 A CN 202010472560A CN 111558444 A CN111558444 A CN 111558444A
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- screening
- belt
- ore
- bend wheel
- conveying belt
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- 238000012216 screening Methods 0.000 claims abstract description 130
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 230000032258 transport Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000003028 elevating effect Effects 0.000 abstract 1
- 238000007873 sieving Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 238000005065 mining Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model provides a breaker is selected to ore for in pit belt middle section, relates to ore screening crushing equipment technical field in the pit, is connected the cooperation with crossheading band conveyer and uses, sets up in crossheading band conveyer's middle section, and crossheading band conveyer includes the transportation belt for the breaker is selected to ore in pit belt middle section includes screening plant, breaker, single area dibit conveyer, and single area dibit conveyer includes positive bend wheel, reverse bend wheel. The positive bend wheel has been connected on the conveyor belt of crossheading band conveyer, two opposite direction of rotation's of reverse bend wheel, conveyor belt is through the mode that changes twice moving direction with self and screening plant, breaker combines, make conveyor belt not only can transport the ore of exploitation to screening plant department, can also transport away the little ore that passes screening plant and the big ore after the breakage simultaneously, in the increase screening function, still need not increase screening elevating conveyor, the waste of resource has been reduced relatively.
Description
Technical Field
The invention relates to the technical field of underground ore screening and crushing equipment, in particular to an ore selective crushing device for an underground belt middle section.
Background
Referring to fig. 1, with the continuous development of the mining industry, the underground mining technology is continuously popularized, and the continuous updating and development of the underground mining technology are promoted by combining the continuous progress of scientific technology in recent years, the underground mining working face is mined in a fully-mechanized mining mode, the ore blocking rate is increased, the mined ore blocks are abundant, therefore, it is necessary to add a crusher 40 above the head unloading point of the gateway loader 20 and the gateway belt conveyor 30, to transport the lump ore to the crusher 40 for crushing, however, the collected ore varies in size, and all the ore is crushed by the crusher 40, so that unnecessary crushed small pieces of ore also pass through the crusher 40, which certainly accelerates the wear of the crusher 40, also, the power of the crusher 40 is increased, and the combined action of the two will ultimately significantly reduce the service life of the crusher 40.
Referring to fig. 2, according to the above problem, a screening transfer conveyor 50 is added between the crossheading transfer conveyor 20 and the crusher 40 and above the crossheading belt conveyor 30 in some mining enterprises, the mined ore is firstly screened by the screening transfer conveyor 50, the small ore directly falls onto the crossheading belt conveyor 30 to be transported away after passing through the screening transfer conveyor 50, and the large ore is transported to the crusher 40 along the screening transfer conveyor 50 to be crushed and then falls onto the crossheading belt conveyor 30 to be transported away, so that the wear rate of the crusher 40 is greatly reduced.
However, the manufacturing of the screening reloader 50 requires more material, and the whole set of screening reloader 50 is manufactured only by adding the screening function, which seriously wastes resources.
Disclosure of Invention
In view of the above, there is a need for a mineral selective breaking apparatus for a middle section of a downhole belt that can add screening function without adding a screening reversed loader.
A mineral ore selective crushing device for the middle section of an underground belt is connected with a crossheading belt conveyor, matched with the crossheading belt conveyor and arranged at the middle section of the crossheading belt conveyor, the crossheading belt conveyor comprises a conveying belt, the mineral ore selective crushing device for the middle section of the underground belt comprises a screening device, a crushing device and a single-belt double-position conveying device, one end of the screening device is arranged close to the crushing device, the other end of the screening device is arranged close to the single-belt double-position conveying device, the single-belt double-position conveying device comprises a positive bend wheel and a reverse bend wheel, the conveying belt is in sliding connection with the positive bend wheel and the reverse bend wheel, the rotating directions of the positive bend wheel and the reverse bend wheel are opposite, the conveying belt changes the conveying directions twice through the positive bend wheel and the reverse bend wheel, the positive bend wheel is arranged higher than the reverse bend wheel, the conveying belt is divided into an upper section, a middle section and a lower section from top section by the reverse bend wheel, in order to transport the ore to screening plant department screening, the middle section of transportation belt removes to the direction of keeping away from screening plant, and the hypomere of transportation belt is the same with the moving direction of the upper segment of transportation belt, and the hypomere of transportation belt is located screening plant, breaker under to the messenger passes the ore of screening plant and the ore after the breakage and falls the hypomere of transportation belt and transports away.
Preferably, the crossheading belt conveyor further comprises a support frame body, the single-belt double-position conveying device further comprises an auxiliary support frame body, an upper supporting roller frame and a support roller, the middle section of the support frame body is disconnected, the disconnected end is connected with one end of the auxiliary support frame body, the disconnected end is connected with the other end of the auxiliary support frame body, the upper supporting roller frame is arranged on the auxiliary support frame body, a central shaft of the support roller is rotatably connected with the upper supporting roller frame, and the conveying belt is in sliding connection with the support roller; the upper supporting roller frames are provided with a preset number, each upper supporting roller frame is provided with a supporting roller, the height of each upper supporting roller frame is sequentially increased along the direction close to the screening device, so that the height of each supporting roller is sequentially increased along the direction close to the screening device, the upper section of the conveying belt is lifted by the supporting rollers towards the direction close to the screening device, and the highest supporting roller is lower than the positive steering wheel; the positive bend wheel is close to the screening plant setting, and positive bend wheel is located the screening plant directly over to the ore that makes the upper segment that is located the conveyor belt transports to the screening plant directly over, and receive self gravity to fall to screening plant on and sieve, the reverse bend wheel is kept away from the screening plant setting.
Preferably, screening plant includes the screening board, the guide is fought, the one end of screening board is close to and is less than the setting of positive bend wheel, the other end is close to and is higher than the breaker setting, the one end of screening board is higher than the other end setting, so that the ore that falls in screening board one end slides to breaker department along the screening board and breaks, the one end and the auxiliary stay support body that the guide was fought are connected, the other end is connected with the screening board, and the top that the guide was fought is located the screening board under, the bottom that the guide was fought is located conveyor belt's hypomere, the top and the bottom that the guide was fought all open, so that can pass the ore of screening board in the ore of screening board and fall into the guide and fight, and the hypomere of falling conveyor belt is transported away along the guide, the ore that can not pass the screening board slides to breaker department along the screening board and breaks.
Preferably, the screening board is the bar sieve, and the screening board is concave arc, and the screening board includes the bar of predetermined quantity, forms the clearance between per two bars, and the clearance increases from top to bottom to prevent that the ore card from in the clearance.
Preferably, the bottom of the crushing device is open and is located directly above the lower section of the conveyor belt, so that ore crushed by the crushing device falls from the bottom of the crushing device to the lower section of the conveyor belt for transportation.
Preferably, the screening board still includes fixed frame, and fixed frame and the other end fixed connection that the guide was fought evenly set up predetermined quantity's draw-in groove on the inside wall of the relative both sides of fixed frame, the terminal surface looks adaptation at the both ends of draw-in groove and stick to make the both ends difference joint of stick at two draw-in grooves internal fixation that set up relatively, the clearance can be through the increase of the quantity that sets up of stick or reduce, and fixed frame's relative both sides are protruding, in order to prevent the both sides landing of the ore from the screening board on the screening board.
By adopting the technical scheme, the invention has the beneficial effects that: only connected two opposite direction of rotation's of positive bend wheel, reverse bend wheel on the conveyor belt of crossheading band conveyer, through the both sides moving direction that changes conveyor belt, just combine conveyor belt and screening plant, breaker for this device realizes transporting the ore of exploitation earlier to screening plant department screening with the cooperation of conveyor belt, carries out the breakage with big ore again, and simultaneously, the big ore after will passing screening plant's little ore and breakage is transported away. When the screening function is added, the whole screening reversed loader does not need to be added, and the waste of resources is relatively reduced.
Drawings
Fig. 1 is a front view of a crossheading reversed loader, a crossheading belt conveyor, and a crusher.
Fig. 2 is a front view of the gate conveyor, gate belt conveyor, crusher, and screening conveyor in combination.
Fig. 3 is a front view of a mineral breaker apparatus for use in a mid-section of a down-hole belt in partial cooperation with a gate-way belt conveyor.
Fig. 4 is a front view of a mineral breaker apparatus for use in a mid-section of a downhole belt in cooperation with a conveyor belt to increase the direction of mineral transport.
FIG. 5 is a front view of a single-belt, two-position conveyor cooperating with a conveyor belt.
Fig. 6 is a partially enlarged view of a in fig. 5.
Fig. 7 is a top view of a screening deck.
FIG. 8 is a longitudinal cross-sectional view of the sizing plate.
In the figure: the ore selection crushing device 10, the screening device 101, the screening plate 1011, the bars 10111, the gaps 10112, the fixed frame 10113, the material guide hopper 1012, the crushing device 102, the single-belt double-position conveying device 103, the positive direction-changing wheel 1031, the reverse direction-changing wheel 1032, the auxiliary support frame 1033, the upper idler frame 1034, the support idler 1035, the crossheading reversed loader 20, the crossheading belt conveyor 30, the conveying belt 301, the support frame 302, the crusher 40 and the screening reversed loader 50 which are used for the middle section of the underground belt.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 3 to 6, an embodiment of the present invention provides an ore selective crushing device 10 for a middle section of a downhole belt, which is connected and used with a gate belt conveyor 30, and is arranged at the middle section of the gate belt conveyor 30, the gate belt conveyor 30 includes a conveying belt 301, the ore selective crushing device 10 for the middle section of the downhole belt includes a screening device 101, a crushing device 102, and a single-belt two-position conveying device 103, one end of the screening device 101 is arranged near the crushing device 102, the other end is arranged near the single-belt two-position conveying device 103, the single-belt two-position conveying device 103 includes a forward direction changing wheel 1031 and a reverse direction changing wheel 1032, the conveying belt 301 is slidably connected with the forward direction changing wheel 1031 and the reverse direction changing wheel 1032, the rotation direction of the forward direction changing wheel 1031 is opposite to that of the reverse direction changing wheel 1032, the forward direction changing wheel 1031 is arranged higher than the reverse direction changing wheel 1032, the transportation belt 301 is divided into an upper section, a middle section and a lower section from top to bottom by the forward direction changing wheel 1031 and the reverse direction changing wheel 1032, the upper section of the transportation belt 301 moves towards the direction close to the screening device 101 so as to transport ores to the screening device 101 for screening, the middle section of the transportation belt 301 moves towards the direction far away from the screening device 101, the lower section of the transportation belt 301 and the upper section of the transportation belt 301 move in the same direction, and the lower section of the transportation belt 301 is located under the screening device 101 and the crushing device 102 so that ores passing through the screening device 101 and crushed ores fall on the lower section of the transportation belt 301 to be transported away.
Further, the crossheading belt conveyor 30 further includes a support frame body 302, the single-belt two-position conveyor 103 further includes an auxiliary support frame body 1033, an upper idler frame 1034 and a support idler 1035, the middle section of the support frame body 302 is disconnected, the disconnected end is connected with one end of the auxiliary support frame body 1033, the disconnected end is connected with the other end of the auxiliary support frame body 1033, the upper idler frame 1034 is arranged on the auxiliary support frame body 1033, the central shaft of the support idler 1035 is rotatably connected with the upper idler frame 1034, and the conveyor belt 301 is slidably connected with the support idler 1035; the number of the upper idler frames 1034 is predetermined, each upper idler frame 1034 is provided with one supporting idler 1035, the height of each upper idler frame 1034 is sequentially increased along the direction close to the screening device 101, so that the height of each supporting idler 1035 is sequentially increased along the direction close to the screening device 101, the supporting idler 1035 further raises the upper section of the conveying belt 301 towards the direction close to the screening device 101, and the highest supporting idler 1035 is lower than the positive direction changing wheel 1031; the positive direction changing wheel 1031 is arranged close to the screening device 101, the positive direction changing wheel 1031 is arranged right above the screening device 101, so that ore positioned at the upper section of the conveying belt 301 is conveyed to the right above the screening device 101 and falls onto the screening device 101 for screening under the action of the gravity of the ore, and the reverse direction changing wheel 1032 is arranged far away from the screening device 101.
Further, the screening device 101 comprises a screening plate 1011 and a material guide bucket 1012, one end of the screening plate 1011 is arranged near and lower than the positive direction changing wheel 1031, the other end of the screening plate 1011 is arranged near and higher than the crushing device 102, one end of the screening plate 1011 is arranged higher than the other end, so that the ore falling on one end of the sieving plate 1011 slides along the sieving plate 1011 to the crushing device 102 for crushing, one end of the material guide hopper 1012 is connected with the auxiliary support frame 1033, the other end is connected with the sieving plate 1011, the top of the material guide hopper 1012 is positioned right below the sieving plate 1011, the bottom of the material guide hopper 1012 is positioned right above the lower section of the conveying belt 301, the top and the bottom of the material guide hopper 1012 are both open, so that ore passing through the sieving plate 1011 among the ore passing through the sieving plate 1011 falls into the material guide 1012, and the ore which falls to the lower section of the conveying belt 301 along the material guide hopper 1012 is conveyed away, and the ore which cannot pass through the sieving plate 1011 slides to the crushing device 102 along the sieving plate 1011 to be crushed.
Further, screening board 1011 is the stick sieve, and screening board 1011 is concave arc, and screening board 1011 includes stick 10111 of predetermined quantity, forms clearance 10112 between per two stick 10111, and clearance 10112 increases from top to bottom to prevent the ore card in clearance 10112.
Further, the bottom of the crusher 102 is open and located directly above the lower section of the conveyor belt 301, so that ore crushed by the crusher 102 falls from the bottom of the crusher 102 to the lower section of the conveyor belt 301 for transportation.
Further, screening board 1011 still includes fixed frame 10113, fixed frame 10113 and the other end fixed connection of guide fill 1012, the draw-in groove of predetermined quantity has evenly been seted up on the inside wall of the relative both sides of fixed frame 10113, the terminal surface looks adaptation at the both ends of draw-in groove and stick 10111, so that the both ends difference joint of stick 10111 is fixed in two draw-in grooves internal fixation that set up relatively, clearance 10112 can be through the increase of the quantity that sets up of stick 10111 or reduce, fixed frame 10113's relative both sides are protruding, in order to prevent the both sides landing of ore from screening board 1011 on the screening board 1011.
Further, the length of the conveyor belt 301 is determined according to actual requirements.
The device is arranged in the middle section of the crossheading belt conveyor 30, and is different from the screening reversed loader 50, and the device does not need to move together with the self-moving tail of the crossheading belt conveyor 30.
When the device is used specifically, mined ores are conveyed to the upper section of the conveying belt 301 through the crossheading transfer conveyor 20, the ores are conveyed to the position right above one end of the screening plate 1011 by the conveying belt 301, the ores fall on the screening plate 1011 under the action of self gravity, and the ores which can penetrate through the screening plate 1011 fall to the lower section of the conveying belt 301 from gaps 10112 between bars 10111 of the screening plate 1011 and are conveyed away by the conveying belt 301; ore which cannot pass through the sieving plate 1011 slides to the crushing device 102 along the sieving plate 1011 to be crushed, and the crushed ore passes through the bottom of the crushing device 102 and falls to the lower section of the conveying belt 301 to be conveyed away by the conveying belt 301.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a breaker is selected to ore that is used for belt middle section in pit which characterized in that: the ore selecting and crushing device for the middle section of the underground belt comprises a screening device, a crushing device and a single-belt double-position conveying device, one end of the screening device is arranged close to the crushing device, the other end of the screening device is arranged close to the single-belt double-position conveying device, the single-belt double-position conveying device comprises a positive bend wheel and a reverse bend wheel, the conveying belt is in sliding connection with the positive bend wheel and the reverse bend wheel, the rotating directions of the positive bend wheel and the reverse bend wheel are opposite, the conveying belt changes the conveying direction twice through the positive bend wheel and the reverse bend wheel, the positive bend wheel is higher than the reverse bend wheel, the positive bend wheel and the reverse bend wheel divide the conveying belt into an upper section, a middle section and a lower section from top to bottom, the upper section of the conveying belt moves towards the direction close to the screening device to convey ores to the screening device for screening, the middle section of the conveying belt moves towards the direction far away from the screening device, the lower section of the conveying belt is the same as the moving direction of the upper section of the conveying belt, and the lower section of the conveying belt is located under the screening device and the crushing device, so that ores passing through the screening device and the crushed ores fall on the lower section of the conveying belt to be conveyed away.
2. A mineral breaker apparatus as claimed in claim 1 wherein: the crossheading belt conveyor further comprises a support frame body, the single-belt double-position conveying device further comprises an auxiliary support frame body, an upper supporting roller frame and a support roller, the middle section of the support frame body is disconnected, the disconnected end is connected with one end of the auxiliary support frame body, the disconnected end is connected with the other end of the auxiliary support frame body, the upper supporting roller frame is arranged on the auxiliary support frame body, a central shaft of the support roller is rotatably connected with the upper supporting roller frame, and the conveying belt is in sliding connection with the support roller; the upper supporting roller frames are provided with a preset number, each upper supporting roller frame is provided with a supporting roller, the height of each upper supporting roller frame is sequentially increased along the direction close to the screening device, so that the height of each supporting roller is sequentially increased along the direction close to the screening device, the upper section of the conveying belt is lifted by the supporting rollers towards the direction close to the screening device, and the highest supporting roller is lower than the positive steering wheel; the positive bend wheel is close to the screening plant setting, and positive bend wheel is located the screening plant directly over to the ore that makes the upper segment that is located the conveyor belt transports to the screening plant directly over, and receive self gravity to fall to screening plant on and sieve, the reverse bend wheel is kept away from the screening plant setting.
3. A mineral breaker apparatus as claimed in claim 2 wherein: screening plant includes the screening board, the guide is fought, the one end of screening board is close to and is less than the setting of positive bend wheel, the other end is close to and is higher than the breaker setting, the one end of screening board is higher than the other end setting, so that the ore that falls in screening board one end slides to breaker department along the screening board and breaks, the one end and the auxiliary stay support body that the guide was fought are connected, the other end is connected with the screening board, and the top that the guide was fought is located the screening board under, the bottom that the guide was fought is located the hypomere of transportation belt directly over, the top and the bottom that the guide was fought all open, so that the ore that can pass the screening board in the ore of screening board falls into the guide and fights, and the hypomere of falling to transportation belt is fought along the guide transports, the ore that can not pass the screening board slides to breaker department along the screening.
4. A mineral breaker apparatus as claimed in claim 3 wherein: the screening board is the stick sieve, and the screening board is concave arc, and the screening board includes the stick of predetermined quantity, forms the clearance between per two sticks, and the clearance from top to bottom increases to prevent that the ore card from in the clearance.
5. A mineral breaker apparatus as claimed in claim 4 wherein: the bottom of the crushing device is opened and is positioned right above the lower section of the conveying belt, so that the ore crushed by the crushing device falls to the lower section of the conveying belt from the bottom of the crushing device and is conveyed away.
6. A mineral breaker apparatus as claimed in claim 5 wherein: the screening board still includes fixed frame, and fixed frame and the other end fixed connection that the guide was fought evenly set up predetermined quantity's draw-in groove on the inside wall of the relative both sides of fixed frame, the terminal surface looks adaptation at the both ends of draw-in groove and stick to make the both ends difference joint of stick be fixed in two draw-in grooves of relative setting, the clearance can be through the increase of the quantity that sets up of stick or reduce, and fixed frame's relative both sides are protruding, in order to prevent the both sides landing of ore from the screening board on the screening board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472560.2A CN111558444A (en) | 2020-05-29 | 2020-05-29 | Ore selective crushing device for underground belt middle section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472560.2A CN111558444A (en) | 2020-05-29 | 2020-05-29 | Ore selective crushing device for underground belt middle section |
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| Publication Number | Publication Date |
|---|---|
| CN111558444A true CN111558444A (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010472560.2A Pending CN111558444A (en) | 2020-05-29 | 2020-05-29 | Ore selective crushing device for underground belt middle section |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134197A (en) * | 2007-09-20 | 2008-03-05 | 山西义棠煤业有限责任公司 | Screen apparatus |
| CN203855174U (en) * | 2014-05-15 | 2014-10-01 | 山东能源机械集团有限公司 | Mobile transfer belt conveyor |
| CN206345473U (en) * | 2016-12-30 | 2017-07-21 | 安徽神健粮食机械设备有限公司 | A kind of multistage portable binning machine |
| CN209577304U (en) * | 2019-01-25 | 2019-11-05 | 中煤能源研究院有限责任公司 | A kind of coal underground separation system raw coal introducing device |
| CN111013736A (en) * | 2019-12-11 | 2020-04-17 | 宁夏天地奔牛实业集团有限公司 | Movable screening and crushing integrated machine for underground coal mine crossheading |
| CN212396972U (en) * | 2020-05-29 | 2021-01-26 | 宁夏天地奔牛实业集团有限公司 | Ore selective crushing device for underground belt middle section |
-
2020
- 2020-05-29 CN CN202010472560.2A patent/CN111558444A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134197A (en) * | 2007-09-20 | 2008-03-05 | 山西义棠煤业有限责任公司 | Screen apparatus |
| CN203855174U (en) * | 2014-05-15 | 2014-10-01 | 山东能源机械集团有限公司 | Mobile transfer belt conveyor |
| CN206345473U (en) * | 2016-12-30 | 2017-07-21 | 安徽神健粮食机械设备有限公司 | A kind of multistage portable binning machine |
| CN209577304U (en) * | 2019-01-25 | 2019-11-05 | 中煤能源研究院有限责任公司 | A kind of coal underground separation system raw coal introducing device |
| CN111013736A (en) * | 2019-12-11 | 2020-04-17 | 宁夏天地奔牛实业集团有限公司 | Movable screening and crushing integrated machine for underground coal mine crossheading |
| CN212396972U (en) * | 2020-05-29 | 2021-01-26 | 宁夏天地奔牛实业集团有限公司 | Ore selective crushing device for underground belt middle section |
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