Raw material grinding device

Abstract

The invention provides a raw material grinding device and belongs to the technical field of smashing devices.The raw material grinding device comprises a shell, a mounting base, a plum blossom frame, a grinding ring, a grinding roller assembly and a scraper knife, and the grinding ring, the grinding roller assembly and the scraper knife are all arranged on the mounting base and located in the shell; the grinding roller assembly and the scraper knife are rotationally arranged in the grinding ring through the plum blossom frame, and the grinding roller assembly comprises a swing column and an extrusion roller which are installed on the plum blossom frame; bulk materials can be thrown to the breaking hammer through the scraper knife, the block materials are broken, and medium materials after being broken enter the mounting groove and are further crushed, so that the situation that the extrusion roller is collided or abraded by the block materials is avoided, and the service life of the extrusion roller is prolonged. And meanwhile, the problem that large materials are difficult to enter between the extrusion roller and the grinding ring is also avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of pulverizing devices, and in particular relates to a raw material grinding device. Background Art

[0002] The structure of Raymond mill is composed of main machine, analyzer, air duct, blower, electric control motor, etc. The material is sent into the grinding chamber of the main machine of Raymond mill through the elevator. Due to the centrifugal force during rotation, the grinding roller swings outward and presses against the grinding ring, so that the purpose of crushing the material is achieved through the rolling of the grinding roller. The fine powder of the ground material will be brought into the analyzer above the machine for sorting with the circulating air of the blower. The material with too coarse fineness will fall back to be re-grinded, and the qualified fine powder will enter the finished product cyclone powder collector with the air flow and be discharged through the powder discharge pipe.

[0003] A Chinese patent with the authorization announcement number CN117138893B discloses a Raymond mill for rare earth recyclable particles, comprising an air duct, a grinding chamber and an analyzer connected in sequence vertically and coaxially. A feeding window is provided on the side of the grinding chamber to connect to the grinding chamber. A driving motor is provided at the bottom of the air duct. The output end of the driving motor is connected to a star frame and circumferentially distributed scrapers through a transmission shaft. A pendulum-shaped grinding roller is hinged on the star frame. A grinding ring assembled into a ring by fan-shaped units is provided on the outer side of the grinding roller. The grinding ring is fixed on the ring frame at the bottom of the grinding chamber. The ring frame can be rotated and locked at an angle along the circumferential direction. An openable and closable side window is provided on one side of the air duct at a corresponding height to the ring frame. Through the arrangement of the side window on one side of the air duct and the rotatable fan-shaped grinding ring, the grinding ring can be directly disassembled and installed through the opened window after opening the side window, and the switching of multiple fan-shaped grinding ring plates can be realized by rotation. The overall replacement is convenient, and there is no need to disassemble the overall components. It has a good development prospect.

[0004] However, during the material grinding process, some larger material blocks are often encountered. These large particles will continue to hit the grinding roller, which will have an adverse effect on the service life of the grinding roller. In addition, if the radius of the material is large, it will be difficult for it to smoothly enter the gap between the grinding ring and the grinding roller, resulting in a decrease in the normal crushing efficiency of the material. Summary of the invention

[0005] The object of the present invention is to provide a raw material grinding device, aiming to solve the problem that the Raymond mill for rare earth recyclable particles in the prior art can facilitate the disassembly and replacement of the grinding roller and grinding ring, but cannot avoid or reduce the wear of the grinding roller.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a raw material grinding device, comprising: an outer shell, a mounting seat, a plum blossom frame, a grinding ring, a grinding roller assembly and a scraper, wherein the grinding ring, the grinding roller assembly and the scraper are all arranged on the mounting seat and located inside the outer shell, the grinding roller assembly and the scraper are rotatably arranged inside the grinding ring through the plum blossom frame, the grinding roller assembly comprises a swing column and an extrusion roller mounted on the plum blossom frame, the extrusion roller is rotatably arranged below the swing column and is arranged at the same height as the grinding ring, a mounting groove is opened below the extrusion roller, a breaker hammer is hinged inside the mounting groove, when the scraper blade rotates, large particle materials are shoveled up to the height of the breaker hammer, when the extrusion roller rotates, one end of the breaker hammer is thrown out of the outside of the mounting groove by centrifugal force to hit the large particle materials.

[0007] Through the rotation of the squeezing roller, the breaker hammer can be thrown out from the installation groove, so that the breaker hammer collides with the large block of material, thereby breaking the large block of material and avoiding the large block of material constantly colliding with the squeezing roller and causing wear of the squeezing roller.

[0008] A further technical solution of the present invention is that a crushing column is arranged on the swing column, and the crushing column is arranged at the same height as the mounting groove, so that a crushing groove is formed between the mounting groove and the crushing column, and when the extrusion roller rotates, the grinding ring pushes one end of the breaker hammer into the crushing groove.

[0009] The material is pushed to the crushing column by the breaker hammer, and the crushing column continuously hits the material, so that the material can be crushed.

[0010] A further technical solution of the present invention is that the scraper includes a blade body, a sieve column and a parabolic trough. The sieve columns are arranged in multiples and evenly distributed in an array, and can form gaps for screening out large-diameter materials. The multiple sieve columns are arranged at an angle, and one end is connected to the upper surface of the scraper. The axial direction of the sieve column points to the mounting groove. The parabolic trough is arranged on the upper surface of the scraper and is a concave arc surface.

[0011] By setting the scraper, materials of different sizes can be thrown to different heights, so that large-diameter materials are thrown to the installation groove, and small-diameter materials are thrown above the extrusion roller.

[0012] A further technical solution of the present invention is that a protective plate is installed on the mounting seat, and the protective plate is arranged below the grinding ring and at the same height as the breaker hammer.

[0013] By setting up the protective plate, the grinding ring can be hit by the breaker hammer instead of the grinding ring, which can effectively avoid the wear of the grinding ring.

[0014] A further technical solution of the present invention is that the protective plate is formed by splicing a plurality of fan-shaped annular arrays into a circular ring shape, and is detachably mounted on a mounting seat.

[0015] By arranging the protective plate into multiple pieces, the protective plate with severe wear can be replaced individually.

[0016] A further technical solution of the present invention is that a friction surface for increasing friction between the sieve column and the material is arranged on the outer surface of the sieve column, and the parabolic trough is longer than the length of the sieve column.

[0017] A further technical solution of the present invention is that each of the grinding roller assemblies corresponds to a scraper, and there is a distance between one end of the top of the scraper and the breaker hammer, which can prevent the breaker hammer from affecting the feeding of materials when rotating.

[0018] A further technical solution of the present invention is that a through hole is provided at the axis of the swing column, and the through hole passes through the bottom of the swing column.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The large pieces of material can be thrown to the breaker by the shovel to be crushed, and the medium-sized materials after crushing enter the installation groove for further crushing, thus avoiding the situation that the large pieces of material will damage or wear the extrusion roller, and also avoiding the problem that the large pieces of material are difficult to eat between the extrusion roller and the grinding ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of a specific embodiment of the present invention; Figure 3 It is a schematic diagram of the installation structure of the grinding roller assembly in a specific embodiment of the present invention; Figure 4 It is a structural schematic diagram of a plum blossom frame in a specific embodiment of the present invention; Figure 5 It is a schematic diagram of the installation structure of a breaker hammer in a specific embodiment of the present invention; Figure 6 It is a structural schematic diagram of a scraper in a specific embodiment of the present invention; Figure 7 It is an exploded schematic diagram of a grinding roller assembly in a specific embodiment of the present invention; Figure 8 It is an axonometric cross-sectional view of a grinding roller assembly in a specific embodiment of the present invention.

[0021] In the figure: 1. grinding ring; 2. grinding roller assembly; 21. swing column; 22. squeezing roller; 211. crushing column; 212. perforation; 22. squeezing roller; 221. mounting groove; 3. breaker; 4. scraper; 41. sieve column; 42. parabolic trough; 43. blade; 6. plum blossom frame; 7. outer shell; 8. protective plate; 9. mounting seat. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 8 , the present invention provides the following technical solutions: a raw material grinding device, including a grinding ring 1, a grinding roller assembly 2, a crushing hammer 3, a scraper 4, a plum blossom frame 6, a mounting seat 9 and a housing 7; The grinding ring 1 is installed on the mounting seat 9, the grinding roller assembly 2 and the scraper 4 are installed on the plum blossom frame 6, and the breaker 3 is installed on the grinding roller assembly 2. The material can be scooped up by rotating the scraper 4, and the scraper 4 can throw materials of different sizes to different heights. The smaller material can be thrown to the grinding roller assembly 2 for grinding, and the larger material will be thrown to the breaker 3, and the breaker 3 will break the material into small pieces, which is then convenient for grinding.

[0024] like Figure 1 and Figure 2 As shown, the grinding ring 1 is fixed on the mounting seat 9, and the grinding roller assembly 2 is installed on the plum blossom frame 6. The grinding roller assembly 2 and the plum blossom frame 6 are both arranged inside the shell 7, and the grinding roller assembly 2 is provided with multiple, the plum blossom frame 6 can rotate inside the shell 7, so as to drive the grinding roller assembly 2 to rotate. In order to drive the plum blossom frame 6 to rotate, a driving structure (not shown in the figure) is arranged at the bottom of the shell 7. The driving structure can be a high-power motor, which can directly or indirectly drive the plum blossom frame 6 to rotate. When the plum blossom frame 6 drives the grinding roller assembly 2 to rotate, the grinding roller assembly 2 can be moved close to the grinding ring 1 through the action of centrifugal force, so that smaller materials can be squeezed and crushed, thereby achieving the effect of grinding.

[0025] like Figure 4 As shown, in order to allow the material to be thrown toward the grinding roller assembly 2, the scraper 4 is fixed to the bottom of the quincunx frame 6, so that the quincunx frame 6 can drive the scraper 4 to rotate when it rotates, so that the scraper 4 can shovel and throw the material at the bottom between the grinding roller assembly 2 and the grinding ring 1.

[0026] like Figure 7 As shown, the grinding roller assembly 2 consists of a swing column 21 and a squeeze roller 22. The swing column 21 and the squeeze roller 22 are coaxially arranged. The swing column 21 is installed on the plum blossom frame 6, so that the plum blossom frame 6 can drive the swing column 21 to rotate, and the squeeze roller 22 can rotate on the swing column 21. When the swing column 21 drives the squeeze roller 22 to rotate, the squeeze roller 22 can rotate by itself through the friction between the grinding rings 1. Through the rotation of the squeeze roller 22, the material can be squeezed and crushed.

[0027] like Figure 4 and Figure 5 As shown, the breaker hammer 3 is arranged below the squeezing roller 22. A plurality of breaker hammers 3 are provided, and all of them can rotate on the squeezing roller 22. The squeezing roller 22 is provided with a mounting groove 221 (such as Figure 7 As shown in the figure, the breaker hammer 3 is hinged at the edge of the mounting groove 221 through a rotating shaft, and the breaker hammer 3 can swing to the inside of the mounting groove 221. When the squeezing roller 22 rotates, one end of the breaker hammer 3 can be thrown out of the mounting groove 221 by centrifugal force to crush large pieces of material.

[0028] When in use, large pieces of material can be shoveled and thrown to the breaker 3 through the blade 4, and then the extrusion roller 22 rotates, which can throw the breaker 3 out of the installation groove 221 and drive the breaker 3 to rotate. During the rotation of the breaker 3, large pieces of material can be hit, thereby achieving the effect of crushing the material.

[0029] like Figure 7 As shown, the squeezing roller 22 is sleeved on the outer surface of the swing column 21 and can rotate on the swing column 21. The swing column 21 is located at the position of the mounting groove 221 and is evenly arrayed with a plurality of crushing columns 211. A crushing groove is formed between the mounting groove 221 and the crushing columns 211. There are gaps between the plurality of crushing columns 211 for the crushed materials to enter the interior of the swing column 21 through the gaps. A through hole 212 is arranged inside the swing column 21. The through hole 212 passes through the bottom of the swing column 21 and connects the gap between the crushing columns 211 with the through hole 212. A protective plate 8 is arranged below the grinding ring 1. The protective plate 8 is arranged at the same height as the breaker 3. The protective plate 8 is in a plurality of fan-shaped shapes and is spliced ​​in a ring array to form a circular ring shape. It is fixed to the mounting seat 9 by screws, so that the breaker 3 can be pushed into the interior of the mounting groove 221 by the effect of resisting the protective plate 8.

[0030] When in use, the material that is crushed into a medium diameter by the breaker 3 will be scooped up by the scraper 4 and thrown into the inside of the crushing trough. Then, one end of the breaker 3 is abutted against the protective plate 8, and the breaker 3 is pushed into the inside of the installation groove 221 to squeeze the material inside the crushing trough. During the extrusion process, since there is relative movement between the crushing column 211 and the extrusion roller 22, the crushing column 211 will continuously collide with the material when the breaker 3 squeezes the material, so as to crush the medium diameter material into small diameter particles. The crushed material falls back into the equipment through the gap between the crushing columns 211 and the perforation 212, and is thrown to the extrusion roller 22 by the scraper 4 for grinding.

[0031] like Figure 6 As shown, the scraper 4 includes a sieve column 41 and a blade body 43. The sieve column 41 is provided with multiple sieve columns 41, which are evenly distributed in an array so that there is a gap between two adjacent sieve columns 41, so that small pieces of material can fall on the surface of the scraper 4 through the gap, while larger materials will be on multiple sieve columns 41. The sieve column 41 is inclined and one end is connected to the upper surface of the scraper 4. The axial direction of the sieve column 41 points to the mounting groove 221, so that large pieces of material are thrown to the mounting groove 221 through the sieve column 41, and small pieces of material will fall on the upper surface of the scraper 4 through the gap of the sieve column 41. A parabolic trough 42 is provided on the upper surface of the scraper 4, and the parabolic trough 42 is in the shape of an inwardly concave arc, and the parabolic trough 42 is longer than the length of the sieve column 41. The parabolic trough 42 can throw smaller materials to the extrusion roller 22, thereby crushing the smaller materials.

[0032] like Figure 4 and Figure 5 As shown, in order to allow small pieces of material to be better thrown between the squeezing roller 22 and the grinding ring 1, there is a distance between the top of the scraper 4 and the breaker 3 in the horizontal plane projection to prevent the breaker 3 from affecting the feeding of the material when rotating. In order to allow large pieces of material to be better thrown into the installation groove 221, a friction surface is provided on the surface of the sieve column 41 to increase the friction between the material and reduce the inertia generated when the material is thrown. In addition, the length and angle of the sieve column 41 can be adjusted to achieve large pieces of material being thrown to the installation groove 221 as much as possible.

[0033] When in use, the shovel blade 4 rotates with the plum blossom frame 6 to scoop up the material at the bottom of the equipment. Due to the setting of the sieve column 41, larger pieces of material can be screened and processed, and the larger pieces of material can be thrown into the installation groove 221 through the sieve column 41 to crush the material, while smaller materials will fall into the parabolic trough 42. The smaller materials can be thrown to the extrusion roller 22 through the parabolic trough 42 for grinding the material.

[0034] Working principle: first, add materials from the feed port of the shell 7 so that the materials fall to the bottom of the equipment, start the driving device, and make the driving device drive the plum blossom frame 6 to rotate, and the plum blossom frame 6 drives the grinding roller assembly 2 to rotate, so that the grinding roller assembly 2 is close to the grinding ring 1 through centrifugal force, and at the same time, the extrusion roller 22 is rotated by friction. The plum blossom frame 6 can drive the scraper 4 to rotate while rotating, and can scoop up the materials at the bottom of the equipment. The scraper 4 can distinguish large and small materials and throw them to different heights. The large materials are increased by the setting of the sieve column 41. The friction between the material and the material is reduced to reduce the height of the material throwing, and the small materials are increased by the setting of the arc of the parabolic trough 42. The height of the small material throwing is increased, so that large materials are easier to throw to the breaker 3 and the crushing trough, and small materials are easier to throw. It is easy to throw it above the squeezing roller 22, which is convenient for grinding small materials. When larger materials are thrown into the crushing trough, the rotation of the squeezing roller 22 can throw the breaker 3 out of the installation groove 221 and hit the large pieces of materials, thereby crushing the large pieces of materials into medium-diameter materials. The medium-diameter materials are scooped up for the second time by the scraper 4, and the medium-diameter materials are thrown into the inside of the crushing trough by the scraper 4, and the breaker 3 is pushed to rotate by the protective plate 8 to squeeze the materials inside the crushing trough. At the same time, the crushing column 211 rotates relative to the squeezing roller 22, and the crushing column 211 will continuously collide with the materials to crush the medium-diameter materials into small-diameter particles. Finally, the small-diameter particles are thrown between the squeezing roller 22 and the grinding ring 1 through the parabolic trough 42 for grinding.

Claims

1. A raw material grinding device, comprising: A housing (7), a mounting seat (9), a plum blossom frame (6), a grinding ring (1), a grinding roller assembly (2) and a scraper (4); the grinding ring (1), the grinding roller assembly (2) and the scraper (4) are all arranged on the mounting seat (9) and located inside the housing (7); the grinding roller assembly (2) and the scraper (4) are rotatably arranged inside the grinding ring (1) via the plum blossom frame (6); and the grinding roller assembly (2) comprises a swing column (21) and a squeeze roller mounted on the plum blossom frame (6). (22), the squeezing roller (22) is rotatably arranged below the swing column (21) and is arranged at the same height as the grinding ring (1), a mounting groove (221) is provided below the squeezing roller (22), a breaker hammer (3) is hinged inside the mounting groove (221), and when the scraper (4) rotates, the large particles of material are shoveled up to the height of the breaker hammer (3), and when the squeezing roller (22) rotates, one end of the breaker hammer (3) is thrown out of the outside of the mounting groove (221) by centrifugal force to hit the large particles of material.

2. A raw material grinding device according to claim 1, characterized in that: A crushing column (211) is provided on the swing column (21), and the crushing column (211) is arranged at the same height as the mounting groove (221), so that a crushing groove is formed between the mounting groove (221) and the crushing column (211), and when the squeezing roller (22) rotates, the grinding ring (1) pushes one end of the crushing hammer (3) into the crushing groove.

3. A raw material grinding device according to claim 1, characterized in that: The scraper (4) comprises a blade body (43), a sieve column (41) and a parabolic trough (42). The sieve columns (41) are provided in plurality and are evenly distributed in an array and can form a gap for screening out large-diameter materials. The plurality of sieve columns (41) are all arranged at an angle and one end is connected to the upper surface of the scraper (4). The axial direction of the sieve column (41) points to the mounting groove (221). The parabolic trough (42) is provided on the upper surface of the scraper (4) and is in the form of an inwardly concave arc surface.

4. A raw material grinding device according to claim 2, characterized in that: A protective plate (8) is mounted on the mounting seat (9), and the protective plate (8) is arranged below the grinding ring (1) and at the same height as the breaker hammer (3).

5. A raw material grinding device according to claim 4, characterized in that: The protective plate (8) is formed by splicing a plurality of fan-shaped annular arrays into a circular ring shape, and is detachably mounted on the mounting seat (9).

6. A raw material grinding device according to claim 3, characterized in that: A friction surface for increasing friction with materials is provided on the outer surface of the sieve column (41), and the parabolic trough (42) is longer than the length of the sieve column (41).

7. A raw material grinding device according to claim 1, characterized in that: Each grinding roller assembly (2) corresponds to a scraper (4), and a distance is provided between one end of the top of the scraper (4) and the breaker hammer (3), so as to prevent the breaker hammer (3) from affecting the feeding of materials when rotating.

8. A raw material grinding device according to claim 1, characterized in that: A through hole (212) is provided at the axis of the swing column (21), and the through hole (212) passes through the bottom of the swing column (21).

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