Dual-transmission-type high-pressure roller mill for mining industry

Abstract

The present application belongs to the technical field of roller mills. Disclosed is a dual-transmission-type high-pressure roller mill for the mining industry, the roller mill comprising a housing supporting assembly, wherein circular feeding assemblies are mounted on two sides of the inner wall of the housing supporting assembly, respectively; a buffering and crushing assembly is mounted on the inner wall of the housing supporting assembly; a roller milling assembly is mounted on the inner wall of the housing supporting assembly, and the roller milling assembly is located below the buffering and crushing assembly; the housing supporting assembly is configured to support the circular feeding assembly, the buffering and crushing assembly and the roller milling assembly; the buffering and crushing assembly can buffer and crush ores; the circular feeding assembly can feed screened ores in a circular manner; and the roller rolling assembly is configured to mill the screened ores. Falling ores fall between two impact plates, and the two impact plates are pushed to move at the same time by means of two hydraulic rods, and can impact on the ores by means of impact needles on the two impact plates, such that the ores are crushed into small blocks, and thus the ore milling efficiency can be improved.

Description

A double-drive high-pressure grinding roller for mining

[0001] This application claims priority to the following patent application filed on May 15, 2024: Chinese patent application entitled "A dual-drive high-pressure roller mill for mining", application number: CN2024106044308, all contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of roller mills, and more particularly to a double-drive high-pressure roller mill for mining. Background Art

[0003] The high-pressure grinding roller (HPGR) is a highly efficient crushing device specifically designed for mineral processing. Designed based on the principle of bed crushing, it utilizes high pressure, slow speed, and full-feed operation to achieve fine crushing of minerals. This significantly increases ore fineness, improves yield, and reduces material wear and dust pollution. Its grinding rollers are specially designed to exhibit a high elastic deformation rate during high-pressure processing, adapting to material changes and ensuring stable and efficient operation. This makes the HPGR an ideal device for fine and ultra-fine crushing of iron ore.

[0004] In the prior art, for example, the document with publication number CN217249154U specifically discloses a single-drive high-pressure roller mill for steel slag sand. Although the device in the document can grind ore, the device processes the ore in a relatively simple and rough manner during the grinding process. When the ore is put into the device through a material hopper for grinding, if the ore is large in volume, it is difficult to quickly crush the large ore by only grinding it with the active roller and the driven roller, which makes it difficult to quickly grind the ore and results in low grinding efficiency. In view of this, we propose a dual-drive high-pressure roller mill for mining. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a dual-drive high-pressure roller grinding mill for mining, which, by providing a buffer crushing assembly, can impact the ore, breaking the ore into small pieces, thereby improving the grinding efficiency of the ore.

[0006] In order to solve the above technical problems, the present application provides the following technical solutions: a dual-drive high-pressure roller mill for mining, comprising a shell support assembly, a circulating feeding assembly being installed on both sides of the inner wall of the shell support assembly, a buffer crushing assembly being installed on the inner wall of the shell support assembly, a roller grinding assembly being installed on the inner wall of the shell support assembly, and the roller grinding assembly being located below the buffer crushing assembly. The shell support assembly is used to support the circulating feeding assembly, the buffer crushing assembly and the roller grinding assembly, the buffer crushing assembly can buffer and crush the ore, the circulating feeding assembly can circulate the screened ore, and the roller grinding assembly is used to grind the screened ore.

[0007] As a preferred solution of the dual-drive high-pressure roller grinding mill for mining described in the present application, the outer shell support assembly includes two first side plates, two fixed frames are fixedly connected between the two first side plates, the inner walls of the two fixed frames are provided with installation cavities, and the relatively close sides of the two fixed frames are provided with first installation holes.

[0008] As a preferred solution of the dual-drive high-pressure roller mill for mining described in the present application, wherein: the outer shell support assembly also includes two third side plates, the relatively close sides of the two third side plates are fixedly connected to the second side plates, the ends of the two second side plates are respectively fixedly connected to the first side plates, the inner walls of the two second side plates are respectively fixedly connected to the two fixed frames, a support frame is fixedly connected between the two second side plates, the top of the support frame is fixedly connected to the bottoms of the two fixed frames, the outer wall of one of the second side plates is fixedly connected to the first machine base, the outer wall of the first machine base is fixedly connected to the first motor, the outer wall of the support frame is fixedly connected to the second machine base, and the outer wall of the second machine base is fixedly connected to the second motor.

[0009] As a preferred solution of the dual-drive high-pressure roller grinding mill for mining described in the present application, wherein: two second mounting holes are symmetrically provided on both sides of the support frame, and the tops of the inner walls of the two second mounting holes are fixedly connected with guide plates, and the inner wall of the support frame is fixedly connected with a screen net, and both ends of the screen net pass through the second mounting holes and extend to the inside of the second side plate, and the screen net is a V-shaped structure.

[0010] As a preferred solution of the dual-drive high-pressure roller grinding mill for mining described in the present application, the circulating feeding assembly includes two collecting plates installed in a V-shaped structure, the two ends of the two collecting plates are respectively fixedly connected to the inner wall of the third side plate, and the two sides of the two collecting plates are respectively fixedly connected to the first side plate and the second side plate.

[0011] As a preferred solution of the dual-drive high-pressure roller mill for mining described in the present application, wherein: the inner walls of the two collecting plates are each provided with a chain conveyor belt, the outer walls of the two chain conveyor belts are each fixedly connected with a plurality of lifting plates, the two ends of the two chain conveyor belts are respectively provided with conveyor rollers, the inner walls of the conveyor rollers are each fixedly connected with a connecting shaft, the two ends of the connecting shaft respectively pass through the second side plate and are rotatably connected thereto, one of the ends of the connecting shaft is fixedly connected to the output end of the first motor, the outer ends of the two connecting shafts located above are each fixedly connected with a synchronous wheel, and the two synchronous wheels are connected by a synchronous belt transmission.

[0012] As a preferred solution of the dual-drive high-pressure roller grinding mill for mining described in the present application, the buffer crushing assembly includes two hydraulic rods, the two hydraulic rods are respectively fixedly connected to the inner wall of the installation cavity, the two inner walls of the installation cavity are slidably connected with an impact plate, the lower ends of the two impact plates extend to the outside of the fixed frame and are located between the two first side plates, and a plurality of impact needles are fixedly connected between the two impact plates.

[0013] As a preferred solution of the dual-drive high-pressure roller mill for mining described in the present application, the buffer crushing assembly also includes a mounting frame, the outer walls of the two mounting frames are provided with mounting grooves, the inner walls of the two mounting grooves are fixedly connected with slide rods, the inner walls of the two mounting grooves are slidably connected with sliders, the ends of the two slide rods pass through the sliders and are slidably connected thereto, the circumferential outer walls of the two slide rods are sleeved with springs, the ends of the two sliders are fixedly connected with support arms, the tops of the two support arms are fixedly connected with buffer plates, the two ends of the spring are respectively fixedly connected to the slider and the inner wall of the mounting frame, the two mounting frames are respectively fixedly connected to the first side plate, and the buffer plate is located below the two aggregate plates.

[0014] As a preferred solution of the dual-drive high-pressure roller mill for mining described in the present application, wherein: the roller mill assembly includes two fixed shafts, the outer circumferential walls of the two fixed shafts are fixedly connected to pressure rollers, the two ends of the two fixed shafts respectively pass through the support frame and extend to the outside thereof, one of the ends of the fixed shaft is fixedly connected to the second motor, the two ends of the fixed shafts are fixedly connected to gears, and a first material gathering plate is provided under the two pressure rollers, and the two first material gathering plates are respectively fixedly connected to the inner wall of the support frame.

[0015] As a preferred solution of the dual-drive high-pressure roller mill for mining described in the present application, the roller mill assembly also includes two second material gathering plates, the side walls of the two second material gathering plates are respectively fixedly connected to the inner wall of the support frame, the bottoms of the two second material gathering plates are fixedly connected to the mounting frame, the inner walls of the two mounting frames are rotatably connected to the rotating shafts, the outer circumferential walls of the two rotating shafts are fixedly connected to rollers, and the two rollers are respectively in rolling contact with the pressure rollers.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The falling ore falls between the two impact plates, which are pushed to move by two hydraulic rods at the same time. The impact pins on the two impact plates can impact the ore, breaking it into small pieces, thereby improving the grinding efficiency of the ore.

[0018] 2. Two hydraulic rods simultaneously push the two impact plates to move, and the impact needles on the two impact plates can impact the ore, so that the ore is broken into small pieces. The ore with smaller particles can be screened through the screening net. The ore with smaller particles is ground by the two pressure rollers, and the ore with larger particles rolls along the screening net to the lifting plates on the chain conveyor belts on both sides. The first motor drives the two chain conveyor belts to rotate in a cycle, so that the ore falls on the two collecting plates and enters the device again for processing, thereby realizing the cyclical processing of the ore.

[0019] 3. By putting the ore into the device, the ore rolls along the two collecting plates and into the top of the buffer plate. At this time, the buffer plate is squeezed by the ore, and the support arm pushes the slider to slide down along the slide rod, thereby squeezing the spring. Under the action of the spring's elastic force, the ore can be cushioned, reducing the impact force when the ore falls. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a schematic diagram of the overall structure of this application;

[0022] FIG2 is a schematic diagram of the internal structure of the present application;

[0023] FIG3 is a schematic diagram of the overall structure of the housing support assembly of the present application;

[0024] FIG4 is a schematic diagram of the internal structure of the housing support assembly of the present application;

[0025] FIG5 is a schematic diagram of a partial structure of the housing support assembly of the present application;

[0026] FIG6 is a schematic diagram of the overall structure of the circulating feeding assembly of the present application;

[0027] FIG7 is a schematic diagram of the overall structure of the buffer crushing assembly of the present application;

[0028] FIG8 is a schematic diagram of a partial structure of the buffer crushing assembly of the present application;

[0029] FIG9 is a schematic diagram of the overall structure of the slow roller grinding assembly of the present application;

[0030] FIG10 is a schematic diagram of the partial structure of the roller grinding assembly of the present application.

[0031] Explanation of reference numerals in the figure: 1. Housing support assembly; 101. First side panel; 102. Fixing frame; 103. Mounting cavity; 104. First mounting hole; 105. Second side panel; 106. Third side panel; 107. Support frame; 108. Second mounting hole; 109. Material guide plate; 110. Screening net; 111. First base; 112. First motor; 113. Second base; 114. Second motor; 2. Circular feeding assembly; 201. Collecting plate; 202. Chain conveyor belt; 203. Conveyor roller; 204 , connecting shaft; 205, synchronous wheel; 206, lifting plate; 3, buffer crushing assembly; 301, impact plate; 302, impact needle; 303, hydraulic rod; 304, buffer plate; 305, mounting frame; 306, mounting groove; 307, slide bar; 308, spring; 309, slider; 310, support arm; 4, roller grinding assembly; 401, fixed shaft; 402, pressure roller; 403, gear; 404, first gathering plate; 405, second gathering plate; 406, mounting frame; 407, rotating shaft; 408, roller. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The specific embodiments of this application are described in detail below in conjunction with the drawings in the specification. Example 1

[0033] As shown in Figures 1 and 2, a dual-drive high-pressure roller mill for mining includes a shell support assembly 1, a circulating feeding assembly 2 is installed on both sides of the inner wall of the shell support assembly 1, a buffer crushing assembly 3 is installed on the inner wall of the shell support assembly 1, a roller grinding assembly 4 is installed on the inner wall of the shell support assembly 1, and the roller grinding assembly 4 is located below the buffer crushing assembly 3. The shell support assembly 1 is used to support the circulating feeding assembly 2, the buffer crushing assembly 3 and the roller grinding assembly 4. The buffer crushing assembly 3 can buffer and crush the ore, the circulating feeding assembly 2 can circulate the screened ore, and the roller grinding assembly 4 is used to grind the screened ore. Example 2

[0034] As shown in Figures 3, 4 and 5, this embodiment is based on the previous embodiment, and differs from the previous embodiment in that: the shell support assembly 1 includes two first side panels 101, and two fixed frames 102 are fixedly connected between the two first side panels 101. The inner walls of the two fixed frames 102 are both provided with installation cavities 103, and the relatively close sides of the two fixed frames 102 are both provided with first installation holes 104.

[0035] The outer shell support assembly 1 also includes two third side panels 106, and the relatively close sides of the two third side panels 106 are fixedly connected to the second side panels 105, the ends of the two second side panels 105 are respectively fixedly connected to the first side panel 101, and the inner walls of the two second side panels 105 are respectively fixedly connected to the two fixed frames 102, and a support frame 107 is fixedly connected between the two second side panels 105. The top of the support frame 107 is fixedly connected to the bottom of the two fixed frames 102, and the outer wall of one of the second side panels 105 is fixedly connected to the first machine base 111, the outer wall of the first machine base 111 is fixedly connected to the first motor 112, the outer wall of the support frame 107 is fixedly connected to the second machine base 113, and the outer wall of the second machine base 113 is fixedly connected to the second motor 114.

[0036] Two second mounting holes 108 are symmetrically provided on both sides of the support frame 107. The top of the inner walls of the two second mounting holes 108 are fixedly connected to a material guide plate 109. The inner wall of the support frame 107 is fixedly connected to a screen net 110. Both ends of the screen net 110 pass through the second mounting holes 108 and extend to the inside of the second side plate 105. The screen net 110 is a V-shaped structure. Example 3

[0037] As shown in Figure 6, this embodiment is based on the previous embodiment, and the difference from the previous embodiment is that the circulating loading assembly 2 includes two collecting plates 201 installed in a V-shaped structure, and the two ends of the two collecting plates 201 are fixedly connected to the inner wall of the third side plate 106, and the two sides of the two collecting plates 201 are fixedly connected to the first side plate 101 and the second side plate 105.

[0038] The inner walls of the two collecting plates 201 are both sleeved with chain conveyor belts 202, and the outer walls of the two chain conveyor belts 202 are fixedly connected with multiple lifting plates 206. The two ends of the two chain conveyor belts 202 are respectively sleeved with conveying rollers 203, and the inner walls of the conveying rollers 203 are fixedly connected with connecting shafts 204. The ends of the two connecting shafts 204 respectively pass through the second side plate 105 and are rotatably connected to it. One end of the connecting shaft 204 is fixedly connected to the output end of the first motor 112, and the outer ends of the two connecting shafts 204 located above are fixedly connected with synchronous wheels 205, and the two synchronous wheels 205 are connected by synchronous belt transmission. Example 4

[0039] As shown in Figures 7 and 8, this embodiment is based on the previous embodiment, and differs from the previous embodiment in that: the buffer crushing assembly 3 includes two hydraulic rods 303, and the two hydraulic rods 303 are respectively fixedly connected to the inner walls of the installation cavity 103, and the inner walls of the two installation cavities 103 are slidably connected with impact plates 301, and the lower ends of the two impact plates 301 extend to the outside of the fixed frame 102 and are located between the two first side plates 101, and a plurality of impact pins 302 are fixedly connected between the two impact plates 301.

[0040] The buffer crushing assembly 3 also includes a mounting frame 305, the outer walls of the two mounting frames 305 are provided with mounting grooves 306, the inner walls of the two mounting grooves 306 are fixedly connected with slide rods 307, the inner walls of the two mounting grooves 306 are slidably connected with sliders 309, the ends of the two slide rods 307 pass through the sliders 309 and are slidably connected thereto, the outer circumferential walls of the two slide rods 307 are sleeved with springs 308, the ends of the two sliders 309 are fixedly connected with support arms 310, the tops of the two support arms 310 are fixedly connected with buffer plates 304, the two ends of the spring 308 are respectively fixedly connected to the sliders 309 and the inner walls of the mounting frames 305, the two mounting frames 305 are respectively fixedly connected to the first side plate 101, and the buffer plate 304 is located below the two aggregate plates 201.

[0041] The falling ore lands between the two impact plates 301, and the two impact plates 301 are pushed to move at the same time by two hydraulic rods 303. The impact needles 302 on the two impact plates 301 can impact the ore, so that the ore is broken into small pieces, thereby improving the grinding efficiency of the ore. By putting the ore into the device, the ore rolls along the two aggregate plates 201 to the top of the buffer plate 304. At this time, the buffer plate 304 is squeezed by the ore, and the slider 309 is pushed downward along the slide rod 307 by the support arm 310, thereby squeezing the spring 308. Under the elastic force of the spring 308, the ore can be buffered to reduce the impact force when the ore falls. Example 5

[0042] As shown in Figures 9 and 10, this embodiment is based on the previous embodiment, and differs from the previous embodiment in that: the roller grinding assembly 4 includes two fixed shafts 401, and the outer walls of the circumference of the two fixed shafts 401 are fixedly connected with pressure rollers 402, and the two ends of the two fixed shafts 401 respectively pass through the support frame 107 and extend to the outside thereof, and one end of the fixed shaft 401 is fixedly connected to the second motor 114, and the ends of the two fixed shafts 401 are fixedly connected with gears 403, and a first material gathering plate 404 is provided under the two pressure rollers 402, and the two first material gathering plates 404 are respectively fixedly connected to the inner wall of the support frame 107.

[0043] The roller grinding assembly 4 also includes two second material gathering plates 405, the side walls of the two second material gathering plates 405 are respectively fixedly connected to the inner wall of the support frame 107, the bottoms of the two second material gathering plates 405 are fixedly connected to the mounting frame 406, the inner walls of the two mounting frames 406 are rotatably connected to the rotating shaft 407, the outer walls of the two rotating shafts 407 are fixedly connected to the rollers 408, and the two rollers 408 are respectively in rolling contact with the pressure roller 402.

[0044] The two impact plates 301 are pushed to move simultaneously by two hydraulic rods 303, and the impact needles 302 on the two impact plates 301 can impact the ore, so that the ore is broken into small pieces. The ore with smaller particles can be screened by the screening net 110, and the ore with smaller particles is ground by the two pressure rollers 402. The ore with larger particles rolls along the screening net 110 to the lifting plate 206 on the chain conveyor belts 202 on both sides. The first motor 112 drives the two chain conveyor belts 202 to rotate in a cycle, so that the ore falls on the two collecting plates 201 and enters the device again for processing, thereby realizing the cyclical reciprocating processing of the ore.

[0045] Working principle: Ore is put into the device, and the ore rolls along the two collecting plates 201 to the top of the buffer plate 304. At this time, the buffer plate 304 is squeezed by the ore, and the support arm 310 pushes the slider 309 to slide downward along the slide rod 307, thereby squeezing the spring 308. Under the elastic force of the spring 308, the ore can be cushioned, reducing the impact force when the ore falls;

[0046] The falling ore lands between the two impact plates 301. The two hydraulic rods 303 push the two impact plates 301 to move simultaneously. The impact pins 302 on the two impact plates 301 can impact the ore, breaking it into small pieces. At the same time, the two moving impact plates 301 can make the ore roll between the impact pins 302 on both sides for easy discharge.

[0047] The crushed small-volume ore falls on the top of the screen mesh 110 and rolls to both sides of the screen mesh 110. The screen mesh 110 can screen the smaller ore to between the two pressing rollers 402 below. The second motor 114 drives the two pressing rollers 402 to rotate through the gear 403, and the ore is ground by the two pressing rollers 402.

[0048] The ore with larger particles rolls along the screening mesh 110 to the lifting plates 206 on the chain conveyor belts 202 on both sides. The first motor 112 drives the two upper connecting shafts 204 to rotate through the synchronous wheel 205 and the synchronous belt, thereby driving the two chain conveyor belts 202 to rotate in a circular manner. The ore is lifted up by the lifting plates 206 and falls onto the two collecting plates 201, and then enters the device again for processing.

[0049] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application, and such changes and improvements fall within the scope of the present application. The scope of protection claimed in this application is defined by the appended claims and their equivalents.

Claims

1. A dual-drive high pressure roller grinding machine for mining, comprising a housing support assembly (1), characterized in that: Circulating feeding assemblies (2) are respectively installed on both sides of the inner wall of the shell support assembly (1), a buffer crushing assembly (3) is installed on the inner wall of the shell support assembly (1), and a roller grinding assembly (4) is installed on the inner wall of the shell support assembly (1), and the roller grinding assembly (4) is located below the buffer crushing assembly (3). The shell support assembly (1) is used to support the circulating feeding assembly (2), the buffer crushing assembly (3) and the roller grinding assembly (4). The buffer crushing assembly (3) can buffer and crush ore, the circulating feeding assembly (2) can circulate the ore after screening, and the roller grinding assembly (4) is used to grind the ore after screening.

2. The dual-drive high pressure roller grinding machine for mining according to claim 1, characterized in that: The housing support assembly (1) comprises two first side plates (101), two fixing frames (102) are fixedly connected between the two first side plates (101), the inner walls of the two fixing frames (102) are provided with mounting cavities (103), and the relatively close sides of the two fixing frames (102) are provided with first mounting holes (104).

3. The dual-drive high pressure roller grinding machine for mining according to claim 2, characterized in that: The housing support assembly (1) further comprises two third side panels (106), the sides of the two third side panels (106) being relatively close to each other are both fixedly connected to the second side panels (105), the ends of the two second side panels (105) are respectively fixedly connected to the first side panel (101), the inner walls of the two second side panels (105) are respectively fixedly connected to the two fixed frames (102), a support frame (107) is fixedly connected between the two second side panels (105), the top of the support frame (107) is fixedly connected to the bottom of the two fixed frames (102), the outer wall of one of the second side panels (105) is fixedly connected to the first machine base (111), the outer wall of the first machine base (111) is fixedly connected to the first motor (112), the outer wall of the support frame (107) is fixedly connected to the second machine base (113), and the outer wall of the second machine base (113) is fixedly connected to the second motor (114).

4. The double-drive high pressure roller grinding machine for mining according to claim 3, characterized in that: Two second mounting holes (108) are symmetrically formed on both sides of the support frame (107); guide plates (109) are fixedly connected to the tops of the inner walls of the two second mounting holes (108); a screening net (110) is fixedly connected to the inner wall of the support frame (107); two ends of the screening net (110) respectively pass through the second mounting holes (108) and extend to the inside of the second side plate (105); and the screening net (110) is a V-shaped structure.

5. The double-drive high pressure roller grinding machine for mining according to claim 4, characterized in that: The circulating material loading assembly (2) comprises two material collecting plates (201) installed in a V-shaped structure, wherein two ends of the two material collecting plates (201) are respectively fixedly connected to the inner wall of the third side plate (106), and two sides of the two material collecting plates (201) are respectively fixedly connected to the first side plate (101) and the second side plate (105).

6. The double-drive high pressure roller grinding machine for mining according to claim 5, characterized in that: The inner walls of the two collecting plates (201) are sleeved with chain conveyor belts (202), the outer walls of the two chain conveyor belts (202) are fixedly connected with a plurality of lifting plates (206), the two ends of the two chain conveyor belts (202) are sleeved with conveying rollers (203), the inner walls of the conveying rollers (203) are fixedly connected with connecting shafts (204), the ends of the two connecting shafts (204) respectively penetrate the second side plate (105) and are rotatably connected thereto, one end of the connecting shaft (204) is fixedly connected to the output end of the first motor (112), the outer ends of the two connecting shafts (204) located above are fixedly connected with synchronous wheels (205), and the two synchronous wheels (205) are connected via a synchronous belt transmission.

7. The double-drive high pressure roller grinding machine for mining according to claim 6, characterized in that: The buffer crushing assembly (3) comprises two hydraulic rods (303), the two hydraulic rods (303) are respectively fixedly connected to the inner wall of the installation cavity (103), the inner walls of the two installation cavities (103) are both slidably connected with an impact plate (301), the lower ends of the two impact plates (301) respectively extend to the outside of the fixed frame (102) and are located between the two first side plates (101), and a plurality of impact pins (302) are fixedly connected between the two impact plates (301).

8. The double-drive high pressure roller grinding machine for mining according to claim 7, characterized in that: The buffer crushing assembly (3) further comprises a mounting frame (305), the outer walls of the two mounting frames (305) are provided with mounting grooves (306), the inner walls of the two mounting grooves (306) are fixedly connected with sliding rods (307), the inner walls of the two mounting grooves (306) are slidably connected with sliders (309), the ends of the two sliding rods (307) pass through the sliders (309) and are slidably connected thereto, the circumferential outer walls of the two sliding rods (307) are sleeved with springs (308), the ends of the two sliders (309) are fixedly connected with support arms (310), the tops of the two support arms (310) are fixedly connected with buffer plates (304), the two ends of the spring (308) are respectively fixedly connected with the sliders (309) and the inner walls of the mounting frames (305), the two mounting frames (305) are respectively fixedly connected with the first side plates (101), and the buffer plates (304) are located below the two aggregate plates (201).

9. The double-drive high pressure roller grinding machine for mining according to claim 8, characterized in that: The roller mill assembly (4) comprises two fixed shafts (401), the circumferential outer walls of the two fixed shafts (401) are fixedly connected to pressure rollers (402), the two ends of the two fixed shafts (401) respectively penetrate the support frame (107) and extend to the outside thereof, one end of the fixed shaft (401) is fixedly connected to the second motor (114), the ends of the two fixed shafts (401) are fixedly connected to gears (403), and a first material gathering plate (404) is provided below the two pressure rollers (402), and the two first material gathering plates (404) are fixedly connected to the inner wall of the support frame (107).

10. The double-drive high pressure roller grinding machine for mining according to claim 9, characterized in that: The roller mill assembly (4) further comprises two second material gathering plates (405), the side walls of the two second material gathering plates (405) being respectively fixedly connected to the inner wall of the support frame (107), the bottoms of the two second material gathering plates (405) being respectively fixedly connected to a mounting frame (406), the inner walls of the two mounting frames (406) being rotatably connected to a rotating shaft (407), the circumferential outer walls of the two rotating shafts (407) being respectively fixedly connected to rollers (408), and the two rollers (408) being respectively in rolling contact with the pressure roller (402).

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