CN114017024B - Hard ore exploitation and transportation equipment - Google Patents
Hard ore exploitation and transportation equipment Download PDFInfo
- Publication number
- CN114017024B CN114017024B CN202111288558.0A CN202111288558A CN114017024B CN 114017024 B CN114017024 B CN 114017024B CN 202111288558 A CN202111288558 A CN 202111288558A CN 114017024 B CN114017024 B CN 114017024B
- Authority
- CN
- China
- Prior art keywords
- equipment
- open
- scraper
- milling
- scraper supporting
- 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.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/68—Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention relates to the field of coal mining mechanical equipment, in particular to hard ore mining and transportation equipment, which comprises milling equipment and semi-open type material transportation equipment which are matched for use, wherein the semi-open type material transportation equipment comprises a non-closed base, an open-close type scraping plate and a chain, and the chain drives the open-close type scraping plate to slide on the non-closed base; the non-closed base comprises a ledge, a scraper supporting plane and a scraper supporting inclined plane which are sequentially connected, the ledge is arranged close to the milling equipment, and the scraper supporting inclined plane is inclined towards the coal seam bottom plate along the direction away from the ledge; one end of the open-close type scraping plate is hinged with a baffle plate, and the baffle plate is lapped on the inclined plane of the scraping plate support. According to the invention, a vertical height-adjusting structure is adopted to replace a rocker arm and a multi-gear traditional system, so that the reliability of equipment is improved, and meanwhile, the milling equipment is more suitable for cutting high-hardness ores. The semi-open material conveying equipment enlarges the area range of the material conveyor for receiving the falling ore, and improves the ore exploitation and conveying efficiency.
Description
Technical Field
The invention relates to the field of coal mining mechanical equipment, in particular to hard ore mining and transportation equipment.
Background
The ore mining equipment, the conveying equipment and the supporting equipment form the main equipment of the ore mining working face. The existing ore mining equipment comprises a coal mining machine, a coal planer and the like, is difficult to consider the length of a transmission chain, the mining height and the like, and is not suitable for the working condition of hard ore mining; in addition, the two sides of the middle groove of the existing material conveying equipment are provided with the protective walls higher than the middle groove, and the protective walls are used for preventing coal rock conveyed on the middle groove from falling outwards. However, coal and rock outside and below the protection side cannot fall into the middle groove for transmission, so that mining waste is caused.
Disclosure of Invention
The invention aims to solve the problems and provides hard ore exploitation and transportation equipment, which adopts the following technical scheme:
the hard ore exploitation and transportation equipment comprises milling equipment and semi-open type material transportation equipment which are matched, wherein the semi-open type material transportation equipment comprises a non-closed base, an open-close type scraping plate and a chain, and the chain drives the open-close type scraping plate to slide on the non-closed type base; the non-closed base comprises a ledge, a scraper supporting plane and a scraper supporting inclined plane which are sequentially connected, the ledge is arranged close to the milling equipment, and the scraper supporting inclined plane is inclined towards the coal seam bottom plate along the direction away from the ledge; one end of the open-close type scraping plate is hinged with a baffle plate, and the baffle plate is lapped on the inclined plane of the scraping plate support.
On the basis of the scheme, a positioning clamping groove is formed in the scraper supporting inclined plane, one side of the baffle, close to the scraper supporting inclined plane, is connected with a guide block which is arranged corresponding to the positioning clamping groove, and the guide block is clamped in the positioning clamping groove.
On the basis of the scheme, the positioning clamping groove is provided with the discharging hole communicated with the positioning clamping groove, and the discharging hole is a through hole extending downwards.
Preferably, the open-close type scraping plate is provided with a recovery groove close to one side of the scraping plate supporting plane, and the shape and the position of the recovery groove are correspondingly arranged with the baffle plate; the baffle is hinged with the opening-closing type scraping plate through a rotating shaft, a torsion spring is sleeved outside the rotating shaft, and the baffle is pulled to the direction of the recovery groove by the torsion spring.
Preferably, the upper surface of the scraper supporting plane is provided with a connecting groove, the connecting groove is arranged at a connecting position with the adjacent scraper supporting plane, and the connecting grooves of the scraper supporting planes between the adjacent material conveying devices are communicated and are movably connected by arranging dumbbell pins in the connecting grooves.
Preferably, milling equipment includes milling cutter head, heightening mechanism, control box and running part, heightening mechanism includes fixed box, heightening hydro-cylinder, elevating platform and motor case, and fixed box and control box fixed connection, heightening hydro-cylinder set up in fixed box along vertical direction, elevating platform and heightening hydro-cylinder's piston rod fixed connection, and the motor case is fixed to be set up on the elevating platform to be connected with milling cutter head.
On the basis of the scheme, the number of the heightening cylinders is multiple, and the heightening cylinders are distributed symmetrically about the center point of the lifting platform; a guide rod is fixedly arranged in the fixed box body along the vertical direction and penetrates through the lifting table; reinforcing ribs are arranged between the fixed box body and the control box body.
Preferably, the depth of the positioning clamping groove is not more than 1/4 of the distance between the scraper supporting plane and the bottom surface of the material conveyor.
Preferably, the milling cutter head comprises a cutter head base body, arc blades, slotting teeth and milling teeth, wherein the arc blades are arranged in a central symmetry mode along the central axis of the cutter head base body, the slotting teeth and the milling teeth are fixedly arranged on the arc blades, the end face of one side, far away from the height adjusting mechanism, of the cutter head base body protrudes outwards, and the thickness of the cutter head base body gradually increases along the direction from the edge to the central axis.
On the basis of the scheme, abrasive particles are arranged on the surfaces of the slotting teeth and the milling teeth.
The beneficial effects of the invention are as follows: the double milling cutter head is used as ore exploitation equipment, the hydraulic heightening equipment can realize the ore exploitation work of different heights, and the ore exploitation range is enlarged; the vertical height-adjusting structure is adopted to replace a rocker arm and a multi-gear traditional system, so that the milling equipment can be more suitable for cutting high-hardness ores while the reliability of the equipment is improved. The semi-open material conveying equipment enlarges the area range of the material conveyor for receiving the falling ore, and improves the ore exploitation and conveying efficiency.
Drawings
Fig. 1: the structure of the invention is schematically shown;
fig. 2: another angular structure of the invention is schematically shown;
fig. 3: the milling cutter head is a cross-sectional view;
fig. 4: the structure of the height adjusting mechanism is schematically shown;
fig. 5: the semi-open material conveying equipment (part) structure of the invention is schematically shown;
fig. 6: the side structure schematic diagram of the semi-open material conveying equipment is provided;
fig. 7: the bottom structure of the open-close type scraping plate is schematically shown;
fig. 8: the non-closed base structure of the present invention is a cross-sectional view.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1, the hard ore mining and transporting device comprises milling equipment and semi-open type material transporting equipment which are matched, and as shown in fig. 5, the semi-open type material transporting equipment comprises a non-closed base 21, an open-close type scraper 22 and a chain 23, and the chain 23 drives the open-close type scraper 22 to slide on the non-closed base 21; the non-closed base 21 comprises a ledge 212, a scraper supporting plane 211 and a scraper supporting inclined plane 215 which are sequentially connected, wherein the ledge 212 is arranged close to milling equipment, and the scraper supporting inclined plane 215 is inclined towards the coal seam bottom plate along the direction away from the ledge 212 and is used for receiving coal rocks in the area below the coal wall. One end of the open-close type scraper 22 is hinged with a baffle 223, the baffle 223 is lapped on the scraper supporting inclined plane 215, and synchronously moves along with the open-close type scraper 22 and pushes coal rocks on the scraper supporting inclined plane 215. As shown in fig. 6 and 7, the open-close type scraper 22 is provided with a recovery groove 225 on the side close to the scraper supporting plane 211, and the shape and position of the recovery groove 225 are set corresponding to those of the baffle 223; the baffle 223 is hinged with the opening and closing type scraping plate 22 through a rotating shaft 222, a torsion spring is sleeved outside the rotating shaft 222, and the torsion spring pulls the baffle 223 to the direction of the recovery groove 225. When the open-close type scraper 22 is positioned above the scraper supporting plane 211, the baffle 223 extends outwards relative to the open-close type scraper 22 and is lapped on the scraper supporting inclined plane 215, when the open-close type scraper 22 passes through the machine head, the baffle 223 is separated from the scraper supporting inclined plane 215 and loses support, the baffle 223 is driven to be clamped into the recovery groove 225 under the action of the torsion spring, the baffle 223 moves below the scraper supporting plane 211, and when the open-close type scraper 22 passes through the machine tail, the baffle 223 is poked out of the recovery groove 225 through a poking rod or other structures or modes, so that the baffle 223 can be lapped on the scraper supporting inclined plane 215 to move continuously.
The ledge 212 is provided with an open-close type scraper limiting groove 213 for limiting the movement of the open-close type scraper 22 on the upper and lower sides of the scraper supporting plane 211, and the open-close type scraper limiting groove 213 is also arranged between the lower part of the scraper supporting plane 211 and the scraper supporting inclined plane 215. In order to prevent the opening and closing type scraper 22 and the baffle 223 from being blocked by coal and rock and jumping during the moving process above the scraper supporting plane 211, as shown in fig. 6 and 7, a positioning clamping groove 216 is arranged on the scraper supporting inclined plane 215, one side of the baffle 223, which is close to the scraper supporting inclined plane 215, is connected with a guide block 224 which is correspondingly arranged with the positioning clamping groove 216, and the guide block 224 is clamped in the positioning clamping groove 216, so that the moving track and the moving direction of the baffle 223 and the opening and closing type scraper 22 are limited, and the jumping generated in the vertical direction is effectively avoided. The depth of the positioning clamping groove 216 is not more than 1/4 of the distance between the scraper supporting plane 211 and the bottom surface of the material conveyor so as to ensure the structural strength. In order to avoid excessive accumulation of ore scraps in the positioning clamping groove 216 and prevent the guiding blocks 224 and the opening and closing type scraping plate 22 from moving, as shown in fig. 8, the positioning clamping groove 216 is provided with a plurality of discharging holes 217 communicated with the guiding blocks, the discharging holes 217 are downward extending through holes, a certain interval is reserved between every two adjacent discharging holes 217, scraps in the positioning clamping groove 216 are moved to the position of the discharging holes 217 through the guiding blocks 224 and discharged, and accumulation is effectively avoided. The size of the discharge hole 217 is smaller than the size of the guide block 224, preventing the guide block 224 from being caught in the discharge hole 217.
The upper surface of the scraper supporting plane 211 is provided with the connecting groove 214, the connecting groove 214 is arranged on the connecting groove 214 of the scraper supporting plane 211 between adjacent material conveying devices and is communicated with the connecting groove 214, and the dumbbell pin is movably connected in the connecting groove 214, so that the stability and the reliability of connection between the scraper conveying devices are improved.
As shown in fig. 2 and 4, the milling device includes a milling cutter 11, a height adjusting mechanism 12, a control box 13, and a traveling part 14, wherein the height adjusting mechanism 12 is disposed at two ends of the control box 13. The height adjusting mechanism 12 comprises a fixed box body 121, a height adjusting oil cylinder 123, a lifting table 125 and a motor box 127, wherein the fixed box body 121 is fixedly connected with the control box body 13, and reinforcing ribs 122 are arranged between the fixed box body 121 and the control box body 13. The height-adjusting oil cylinders 123 are arranged in the fixed box 121 along the vertical direction, the lifting platforms 125 are fixedly connected with piston rods of the height-adjusting oil cylinders 123, the number of the height-adjusting oil cylinders 123 is multiple, and the lifting platforms 125 are distributed in a central point central symmetry mode, so that the bearing capacity and lifting stability of the lifting platforms 125 are improved. The fixed box 121 is internally provided with a guide rod 124 along the vertical direction, the guide rod 124 penetrates through the lifting platform 125, the top end of the guide rod 124 is fixedly connected with the fixed box 121 through a guide fixed block 126, and the moving track of the lifting platform 125 is determined through the guide rod 124 so as to prevent deviation. The motor box 127 is fixedly arranged on the lifting table 125 and is connected with the milling cutter head 11 to drive the milling cutter head 11 to operate. The milling cutter head 11 can be adjusted in height along the vertical direction through the structure, replaces the structural form of the traditional rocker arm structure and multi-gear transmission system, has larger structural rigidity, can be more suitable for mining working conditions of high hardness of cutting materials, large cutting load value and large load fluctuation range, and can be suitable for various coal rocks and more severe mining environments. Meanwhile, the hydraulic oil cylinder structure omits a large number of transmission structures, has simple structure and small equipment occupation space, can directly transmit the power of the motor to the milling cutter head 11, effectively reduces efficiency loss, and avoids the occurrence of failure conditions such as gear failure and the like in the traditional structure. Preferably, a top plate is fixedly arranged at the top of the fixed box body 121, a limit clamping table 128 is fixedly arranged on the side surface of the motor box 127, the limit clamping table 128 is arranged below the top plate, and the lifting range of the motor box 127 is limited by enabling the limit clamping table 128 to be abutted to the top plate.
As shown in fig. 1 and 3, the milling cutter head comprises a cutter head base 111, arc blades 112, slotting teeth 113 and milling teeth 114, wherein the arc blades 112 are arranged in a central symmetry manner along the central axis of the cutter head base 111, the slotting teeth 113 and the milling teeth 114 are fixedly arranged on the arc blades 112, the end face of the cutter head base 111, which is far away from one side of the height adjusting mechanism 12, protrudes outwards, and the thickness of the cutter head base 111 gradually increases along the direction from the edge to the central axis, so that the distance between the cutter head base 111 and the coal wall gradually increases along the direction from the axis to the outer circumference, and blockage of coal rock fragments, dust and the like in the cutting process of the cutter head is effectively prevented. Abrasive particles 115 are provided on the surfaces of the grooving teeth 113 and the milling teeth 114 to increase the wear resistance of the grooving teeth 113 and the milling teeth 114.
The present invention has been described above by way of example, but the present invention is not limited to the above-described embodiments, and any modifications or variations based on the present invention fall within the scope of the present invention.
Claims (9)
1. The hard ore exploitation and transportation equipment is characterized by comprising milling equipment and semi-open type material transportation equipment which are matched, wherein the semi-open type material transportation equipment comprises a non-closed base (21), an open-close type scraping plate (22) and a chain (23), and the chain (23) drives the open-close type scraping plate (22) to slide on the non-closed base (21); the non-closed base (21) comprises a ledge (212), a scraper supporting plane (211) and a scraper supporting inclined plane (215) which are sequentially connected, the ledge (212) is arranged close to milling equipment, and the scraper supporting inclined plane (215) inclines towards the coal seam floor along the direction away from the ledge (212); one end of the open-close type scraping plate (22) is hinged with a baffle plate (223), and the baffle plate (223) is lapped on the scraping plate supporting inclined plane (215);
milling equipment includes milling cutter dish (11), heightening mechanism (12), control box (13) and running gear (14), heightening mechanism (12) are including fixed box (121), heightening hydro-cylinder (123), elevating platform (125) and motor case (127), fixed box (121) and control box (13) fixed connection, heightening hydro-cylinder (123) set up in fixed box (121) along vertical direction, elevating platform (125) and the piston rod fixed connection of heightening hydro-cylinder (123), motor case (127) fixed set up on elevating platform (125) to be connected with milling cutter dish (11).
2. The hard ore mining and transporting apparatus according to claim 1, wherein a positioning clamping groove (216) is provided on the scraper supporting inclined surface (215), and a guide block (224) provided corresponding to the positioning clamping groove (216) is connected to one side of the baffle plate (223) close to the scraper supporting inclined surface (215), and the guide block (224) is clamped in the positioning clamping groove (216).
3. The hard ore mining and transporting apparatus as claimed in claim 2, wherein the positioning slot (216) is provided therein with a discharge hole (217) communicating therewith, the discharge hole (217) being a downwardly extending through hole.
4. The hard ore mining and transporting apparatus according to claim 1, wherein the retractable scraper (22) is provided with a recovery groove (225) at a side close to the scraper supporting plane (211), and the shape and position of the recovery groove (225) are arranged corresponding to those of the baffle (223); the baffle plate (223) is hinged with the opening-closing type scraping plate (22) through a rotating shaft (222), a torsion spring is sleeved outside the rotating shaft (222), and the torsion spring pulls the baffle plate (223) to the direction of the recovery groove (225).
5. The hard ore mining and transporting apparatus as claimed in claim 1, wherein the upper surface of the scraper supporting plane (211) is provided with a connecting groove (214), the connecting groove (214) is provided at a connection position with the adjacent scraper supporting plane (211), the connecting groove (214) of the scraper supporting plane (211) between the adjacent material conveying apparatuses is communicated, and the dumbbell pin is movably connected by being provided in the connecting groove (214).
6. The hard ore mining and transporting apparatus as claimed in claim 1, wherein the number of the height-adjusting cylinders (123) is plural and is distributed symmetrically with respect to a center point of the elevating table (125); a guide rod (124) is fixedly arranged in the fixed box body (121) along the vertical direction, and the guide rod (124) penetrates through the lifting table (125); reinforcing ribs (122) are arranged between the fixed box body (121) and the control box body (13).
7. The hard ore mining and transporting equipment according to claim 2, characterized in that the depth of the positioning slot (216) is not more than 1/4 of the distance between the scraper support plane (211) and the bottom surface of the material conveyor.
8. The hard ore mining and transporting apparatus according to claim 1, wherein the milling cutter head includes a cutter head base body (111), arc blades (112), slotting teeth (113) and milling teeth (114), the plurality of arc blades (112) are arranged in a central symmetry along a central axis of the cutter head base body (111), the slotting teeth (113) and the milling teeth (114) are fixedly arranged on the arc blades (112), an end surface of the cutter head base body (111) on a side far away from the height adjusting mechanism (12) protrudes outwards, and a thickness gradually increases in a direction from an edge to the central axis.
9. The hard ore mining and transporting equipment according to claim 8, characterized in that the grooved teeth (113) and milling teeth (114) are provided with abrasive particles (115) on their surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111288558.0A CN114017024B (en) | 2021-11-02 | 2021-11-02 | Hard ore exploitation and transportation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111288558.0A CN114017024B (en) | 2021-11-02 | 2021-11-02 | Hard ore exploitation and transportation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114017024A CN114017024A (en) | 2022-02-08 |
| CN114017024B true CN114017024B (en) | 2023-07-21 |
Family
ID=80060260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111288558.0A Active CN114017024B (en) | 2021-11-02 | 2021-11-02 | Hard ore exploitation and transportation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114017024B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116513715B (en) * | 2023-05-30 | 2023-11-24 | 山东科技大学 | Space double-chain right-angle turning assembly of scraper conveyor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2927919C2 (en) * | 1979-07-11 | 1983-03-24 | Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum | Support arm for drum shearers |
| EP0057711B1 (en) * | 1980-08-13 | 1985-03-20 | Dresser Europe S.A. | Mineral winning machine and system |
| PL180953B1 (en) * | 1996-11-28 | 2001-05-31 | Ct Kt Maszyn Gorniczych Komag | Tilting system for a coal lump crusher |
| US8899693B2 (en) * | 2011-04-22 | 2014-12-02 | Joy Mm Delaware, Inc. | Material guide assembly |
| CN109611092A (en) * | 2019-01-08 | 2019-04-12 | 山东科技大学 | A kind of mining full height coalcutter and coal-mining method |
| CN110080757A (en) * | 2019-04-30 | 2019-08-02 | 贵州芭田生态工程有限公司 | A kind of cutter device for mining, Mars Miner |
-
2021
- 2021-11-02 CN CN202111288558.0A patent/CN114017024B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114017024A (en) | 2022-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114017024B (en) | Hard ore exploitation and transportation equipment | |
| CN201391334Y (en) | Scraper conveyor for fully-mechanized mining in thin seam | |
| US2920879A (en) | Mining apparatus utilizing two side cutting augers | |
| US4062595A (en) | Automatic face transfer linear cutting rotary head continuous mining machine and method | |
| AU2022204498A1 (en) | Shield for sumping frame of mining machine | |
| US3873157A (en) | Mobile mine tunnelling machine having cooperable cutter, trough, loader and converyors | |
| CN103775082B (en) | Novel thin coal seam overlap side dump structure | |
| CN210762644U (en) | Sand collecting and feeding hopper of steel sand elevator | |
| CN202225014U (en) | Steel scrap cleaner for vertical milling machine | |
| US3285662A (en) | Planer arrangement for extraction of mineral | |
| CN212665240U (en) | Traveling mechanism of laser cutting machine | |
| RU2768356C2 (en) | Tunneling machine with device for cutting protrusions | |
| CN202240695U (en) | Steel slag clearing device of vertical-type milling machine | |
| CN211058826U (en) | Stacking type support and pushing sliding cylinder linking device for high-grade common mining working face | |
| CN220264012U (en) | Coal sliding device | |
| CN219336175U (en) | Shearing machine material bed | |
| CN214616517U (en) | Secondary coal conveying and receiving device of heading machine | |
| CN216429671U (en) | Head heightening seat | |
| CN218619281U (en) | A unloader for wear-resisting forged steel ball raw materials for production | |
| US2303372A (en) | Loading machine | |
| CN217813449U (en) | Short wall operation grinding and mining machine adopting grinding and mining mode | |
| CN109736799A (en) | Thin seam mining system cutting units | |
| CN215860306U (en) | Crushing device and transportation system | |
| CN216737390U (en) | Raw materials hoisting device is used in wear-resisting material production | |
| CN217919842U (en) | Reverse-sorting and unloading device for gangue |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |