Three-roll high-efficiency Raymond mill

Abstract

This utility model discloses a three-roll high-efficiency Raymond mill, including a grinding body and an analyzer body. This utility model employs synchronously rotating polypropylene scrapers that contact the polypropylene inner shell inside the analyzer body to simultaneously scrape away material adhering to the inner shell, reducing material residue and allowing the material to fall back down. This enables thorough grinding and sorting of the material, while simultaneously cleaning the inner shell, reducing labor intensity and interference with the blower's negative pressure, ensuring the analyzer's high efficiency. Furthermore, the scraper and the fixing plate are connected by a snap-fit ​​mechanism; when maintenance is needed, simply pressing the spring clips on the scraper surface retracts the protruding structure, allowing for quick disassembly and replacement, reducing maintenance difficulty and intensity. It offers advantages such as easy inner wall cleaning, removal of adhering material, and convenient scraper maintenance.

Description

Technical Field

[0001] This utility model relates to the field of Raymond mill technology, specifically to a three-roll high-efficiency Raymond mill. Background Technology

[0002] The Raymond mill mainly consists of a main unit, an analyzer, a blower, a finished product cyclone separator, a micro powder cyclone separator, and air ducts. The main unit comprises a frame, an inlet volute, blades, grinding rollers, a grinding ring, and a casing. During operation, the material to be pulverized is fed into the mill through the feed hopper on the side of the casing. The grinding rollers, suspended on the main unit's frame, revolve around a vertical axis while simultaneously rotating on their own axis. Due to centrifugal force during rotation, the grinding rollers swing outwards, pressing tightly against the grinding ring. The blades scoop up the material and deliver it between the grinding rollers and the grinding ring, where the rolling and crushing action of the grinding rollers achieves the purpose of pulverizing the material.

[0003] The existing public technology application number is CN202321453321.8, which describes a Raymond mill that maintains a dry internal environment by using a blowing and heating system, thereby improving grinding efficiency in humid environments; improves the efficiency of grinding wet materials by using a heating and drying system; and removes sticky residues by using a scraping system, thereby improving the machine's lifespan.

[0004] Based on the aforementioned patents and the current production situation of Raymond mills, it is not difficult to find that in the existing technology, when processing materials, due to the inherent viscosity of the materials, the formed powder is prone to sticking to the inner wall of the analyzer. This not only causes material waste and makes subsequent cleaning difficult, but also the thick layer of powder adhering to the inside affects the negative pressure of the blower, causing the analyzer to shake violently, which in turn affects the use of the structure. The overall performance is not ideal and there is room for improvement.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a three-roll high-efficiency Raymond mill, which has the advantages of easy inner wall cleaning, removal of adhering materials, and convenient scraper maintenance, thereby solving the problems mentioned in the background technology.

[0008] (II) Technical Solution

[0009] To achieve the advantages of internal wall cleaning, removal of adhering materials, and convenient scraper maintenance, the specific technical solution adopted by this utility model is as follows:

[0010] A three-roll high-efficiency Raymond mill includes a grinding mill body and an analyzer body. The analyzer body is installed at the top of the grinding mill body. A polypropylene inner shell is installed on the inner wall of the analyzer body, and its surface contacts a polypropylene scraper. One end of the polypropylene scraper is engaged with a fixed plate via a spring clip and a slot, with the spring clip located on the surface of the polypropylene scraper and the slot located on the corresponding position on the surface of the fixed plate. A limit rod is welded to one end of the fixed plate, and the limit rod is slidably connected to the fixed rod. A protective cover is installed at the middle of the top of the analyzer body. A rotating shaft is rotatably connected to the middle of the inside of the protective cover. A rotating cylinder is rotatably connected to the outer circumference of the rotating shaft. One end of the rotating shaft passes through one side of the analyzer body and is connected to the blades. One end of the rotating cylinder passes through one side of the analyzer body and is connected to the fixed rod. Transmission gears are installed on the surfaces of the rotating cylinder and the rotating shaft, and each transmission gear is meshed with a drive gear at one end. The drive gear is located on a drive shaft, and one end of the drive shaft passes through one side of the protective cover and is connected to a second motor.

[0011] Furthermore, a receiving tray is installed inside the grinding machine body, and a main frame is installed in the middle of the receiving tray. One end of the main frame passes through one side of the receiving tray and is connected to the first motor. Several sets of grinding rollers are installed on the main frame. Grinding rings are installed around the outer periphery of the grinding rollers at the top of the receiving tray. Several sets of scrapers are installed on one side of the grinding rollers on the main frame.

[0012] Furthermore, an air supply pipe is installed on the outer surface of the grinding machine body, a fan is installed in the air inlet area of ​​the air supply pipe, and an air outlet is provided at the contact position between the air outlet area of ​​the air supply pipe and the surface of the grinding machine body.

[0013] Furthermore, a discharge pipe is installed on one side of the top of the analyzer body.

[0014] Furthermore, a feed inlet is installed at an angle on one side surface of the grinding machine body.

[0015] Furthermore, a receiving cavity is provided at the contact position between the fixed rod and the limiting rod, and a return spring is installed inside the receiving cavity, with both ends of the return spring being fixedly connected to the inner wall of the receiving cavity and the surface of the limiting rod, respectively.

[0016] Furthermore, the grinding rollers are provided in three sets.

[0017] Furthermore, the size of the transmission gear on the surface of the rotating cylinder is larger than the size of the transmission gear on the surface of the rotating shaft.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, this utility model provides a three-roll high-efficiency Raymond mill, which has the following beneficial effects:

[0020] This invention employs a synchronously rotating polypropylene scraper that contacts the polypropylene inner shell of the analyzer to simultaneously scrape away material adhering to the inner shell, reducing material residue and allowing the material to fall back down for thorough grinding and sorting. This simultaneous cleaning of the inner shell reduces labor intensity and interference with the blower's negative pressure, ensuring efficient analyzer operation. Furthermore, the scraper and fixing plate are connected by a snap-fit ​​mechanism; for maintenance, simply pressing the spring clips on the scraper surface retracts the protruding structure, allowing for quick disassembly and replacement. This reduces maintenance difficulty and intensity, facilitating better use and offering advantages such as easy inner wall cleaning, material removal, and scraper maintenance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the three-roll high-efficiency Raymond mill proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the connection structure of the spring buckle and the slot of this utility model;

[0024] Figure 3 This is a schematic diagram of the drive shaft and drive gear of this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the fixing rod and the limiting rod of this utility model.

[0026] In the picture:

[0027] 1. Grinding machine body; 2. First motor; 3. Receiving tray; 4. Scraper; 5. Grinding roller; 6. Air supply pipe; 7. Fan; 8. Grinding ring; 9. Air outlet; 10. Main unit frame; 11. Analyzer body; 12. Polypropylene inner shell; 13. Polypropylene scraper; 14. Fixing plate; 15. Limiting rod; 16. Return spring; 17. Fixing rod; 18. Protective cover; 19. Rotating shaft; 20. Transmission gear; 21. Second motor; 22. Drive shaft; 23. Drive gear; 24. Rotating cylinder; 25. Discharge pipe; 26. Slot; 27. Blade; 28. Spring clip; 29. ​​Feed inlet. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to an embodiment of the present invention, a three-roll high-efficiency Raymond mill is provided.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4As shown, the three-roll high-efficiency Raymond mill according to an embodiment of the present invention includes a grinding mill body 1 and an analyzer body 11. The analyzer body 11 is installed at the top of the grinding mill body 1. A polypropylene inner shell 12 is installed on the inner wall of the analyzer body 11. The surface of the polypropylene inner shell 12 is in contact with a polypropylene scraper 13. One end of the polypropylene scraper 13 is engaged with a fixed plate 14 by a spring clip 28 and a slot 26. The spring clip 28 is located on the surface of the polypropylene scraper 13, and the slot 26 is located at a corresponding position on the surface of the fixed plate 14. A limit rod 15 is welded to one end of the fixed plate 14. The limit rod 15 is slidably connected to the fixed rod 17. A protective cover 18 is installed at the middle of the top of the analyzer body 11. The protective cover 18 rotates at the middle of its interior. A rotating shaft 19 is connected, and a rotating cylinder 24 is rotatably connected to the outer circumference of the rotating shaft 19. One end of the rotating shaft 19 passes through one side of the analyzer body 11 and is connected to the blade 27. One end of the rotating cylinder 24 passes through one side of the analyzer body 11 and is connected to the fixed rod 17. Transmission gears 20 are installed on the surface of the rotating cylinder 24 and the surface of the rotating shaft 19, and one end of each transmission gear 20 is meshed with a drive gear 23. The drive gear 23 is located on the drive shaft 22, and one end of the drive shaft 22 passes through one side of the protective cover 18 and is connected to the second motor 21. The top of the grinding machine body 1 is bolted to the analyzer body 11 via a flange, and a sealing gasket (wear-resistant rubber material) is installed at the connection to ensure that dust does not leak out during the grinding process. The inner wall of the analyzer body 11 is bolted... Fixed polypropylene inner shell 12; polypropylene scraper 13 and fixed plate 14: one end of the polypropylene scraper 13 is provided with a protruding spring buckle 28 (material POM plastic), and the fixed plate 14 has a corresponding slot 26 (e.g., depth 15mm). When the spring buckle 28 is pressed, the protruding structure retracts, allowing the scraper to be inserted into the slot 26; after releasing, the buckle springs open to achieve a snap-fit ​​fixation; limiting rod 15 and fixed rod 17: the other end of the fixed plate 14 is welded with a limiting rod 15 (e.g., round steel with a diameter of 12-16mm), and the fixed rod 17 has a receiving cavity (e.g., diameter 20mm). The limiting rod 15 is inserted into the receiving cavity and connected to a return spring 16 (e.g., diameter 8mm, free length 50mm). The two ends of the spring are fixed to the cavity wall and the end face of the limiting rod 15, respectively; scraper drive The fixed rod 17 is connected to the rotating cylinder 24 by bolts. When the rotating cylinder 24 rotates, it drives the fixed rod 17 to rotate around the axis of the analyzer body 11. The limiting rod 15 slides in the receiving cavity. The return spring 16 provides elastic pressure so that the scraper always adheres to the surface of the polypropylene inner shell 12. The transmission system is as follows: The second motor 21 drives the drive gear 23 (e.g., module 3, number of teeth 24) to rotate through the drive shaft 22. The drive gear 23 meshes with the transmission gear 20 on the surface of the rotating shaft 19 and the rotating cylinder 24. The transmission ratio between the transmission gear 20 (e.g., number of teeth 48) and the drive gear 23 of the rotating cylinder 24 is 2:1. The transmission ratio between the transmission gear 20 (number of teeth 24) and the drive gear 23 of the rotating shaft 19 is 1:1, so that the rotation speed of the rotating cylinder 24 is 1 / 2 of that of the rotating shaft 19.Inner wall cleaning: The rotating cylinder 24 drives the scraper to rotate, and the elastic pressure of the polypropylene scraper 13 ensures close contact with the inner shell surface, scraping off adhering materials and preventing material residue from affecting the analyzer's negative pressure; convenient maintenance: The snap-fit ​​design of the spring clip 28 shortens the scraper disassembly time, improves maintenance efficiency, and the polypropylene material is wear-resistant.

[0031] like Figure 1 As shown, a receiving tray 3 is installed inside the grinding machine body 1. A main frame 10 is installed in the middle of the receiving tray 3. One end of the main frame 10 passes through the receiving tray 3 and is connected to the first motor 2. Several sets of grinding rollers 5 are installed on the main frame 10. Grinding rings 8 are installed around the outer periphery of the grinding rollers 5 at the top of the receiving tray 3. Several sets of scrapers 4 are installed on one side of the grinding rollers 5 on the main frame 10. The receiving tray 3 is fixed to the bottom of the grinding machine body 1 by bolts. A through hole is opened in the center. The main frame 10 (made of cast iron) is fixed in the through hole by a bearing seat. One end is connected to the output shaft of the first motor 2 by a key. Grinding rollers 5 and grinding rings 8: Three sets of grinding rollers 5 (made of high chromium cast iron) are evenly distributed on the main frame 10 and are hinged by a pin. They can swing around the pin. The grinding rings 8 are fixed to the top of the receiving tray 3 by bolts and form a grinding ring with the grinding rollers 5. Grinding pair; Scraper 4 installation: The scraper 4 (made of wear-resistant rubber) is fixed to the main unit's sprite frame 10 with bolts. The distance between the blade and the surface of the receiving tray 3 is 3-5mm. When the sprite frame rotates, it scoops up the material and feeds it into the gap between the grinding roller 5 and the grinding ring 8; Grinding motion: The first motor 2 drives the main unit's sprite frame 10 to rotate. The grinding roller 5 swings outward under the action of centrifugal force and presses tightly against the surface of the grinding ring 8. The material is crushed under the crushing and shearing action of the grinding roller 5 and the grinding ring 8; Material conveying: The scraper 4 rotates with the sprite frame, scoops up the material on the receiving tray 3 and throws it into the gap between the grinding roller 5 and the grinding ring 8; High-efficiency grinding: The three sets of grinding rollers 5 work at the same time, and the grinding efficiency is 2 times higher than that of a single roller. The output particle size can reach 80-325 mesh (pass rate ≥95%); Wear-resistant design: The grinding roller 5 and the grinding ring 8 are made of high-chromium cast iron (hardness HRC55-60), which extends the service life and reduces the replacement frequency.

[0032] like Figure 1As shown, an air supply duct 6 is installed on the outer surface of the grinding machine body 1. A fan 7 is installed in the air inlet area of ​​the air supply duct 6. An air outlet 9 is provided at the contact point between the air outlet area of ​​the air supply duct 6 and the surface of the grinding machine body 1. The air supply duct 6 (e.g., DN200-250 diameter) is welded to the outer side of the grinding machine body 1 in a volute shape. The air inlet end is connected to the flange of the fan 7, and the air outlet end has an air outlet 9 (e.g., 100-150mm wide) facing upwards towards the grinding ring 8. Fan 7 installation: The fan 7 is fixed to the ground by a shock-absorbing bracket, and the air outlet 9 is connected to the air supply duct 6. Flexible joints are used to reduce vibration transmission; airflow circulation: the airflow generated by the blower 7 is blown out at high speed from the outlet 9 through the air supply pipe 6, carrying the ground material upward and entering the analyzer body 11 for particle size classification; material lifting: the airflow speed ensures that the material below 100 mesh is blown up and enters the analyzer, while coarse particles fall back to the receiving tray 3 due to gravity for re-grinding, with a classification efficiency of over 90%; cooling and heat dissipation: the airflow also carries away the heat generated during the grinding process, keeping the grinding chamber temperature ≤60℃, and preventing the material from clumping due to high temperature.

[0033] like Figure 1 As shown, a discharge pipe 25 is installed on one side of the top of the analyzer body 11. The discharge pipe 25 (e.g., pipe diameter DN150-200) is welded to one side of the top of the analyzer body 11 and communicates with the inside of the analyzer. The outlet end is connected to a cyclone separator or a bag filter. Finished product collection: The qualified fine powder after being classified by the analyzer is discharged from the discharge pipe 25 with the airflow and enters the collection system. The collection efficiency is ≥99%, ensuring that the finished product has uniform particle size.

[0034] like Figure 1 As shown, a feed inlet 29 is installed at an angle on one side of the grinding machine body 1. The feed inlet 29 is welded at an angle to one side of the grinding machine body 1 (e.g., at an angle of 45°). A guide plate (not shown) is provided inside to ensure that the material falls evenly into the receiving tray 3. The feeding is uniform: the inclined feed inlet 29, together with the guide plate, makes the material evenly distributed on the receiving tray 3, avoiding local accumulation and improving grinding efficiency.

[0035] like Figure 1 and Figure 4 As shown, a receiving cavity is provided at the contact position between the fixed rod 17 and the limiting rod 15, and a return spring 16 is installed inside the receiving cavity. The two ends of the return spring 16 are fixedly connected to the inner wall of the receiving cavity and the surface of the limiting rod 15, respectively. The return spring 16 is installed in the receiving cavity of the fixed rod 17 to provide axial thrust to the limiting rod 15, so that the scraper and the polypropylene inner shell 12 maintain a constant contact pressure. The pressure is constant: the return spring 16 compensates for scraper wear (when the wear amount is ≤2mm), ensuring stable contact pressure and maintaining the scraping effect.

[0036] like Figure 1 As shown, there are three sets of grinding rollers 5.

[0037] like Figure 1 As shown, the size of the transmission gear 20 on the surface of the rotating cylinder 24 is larger than that on the surface of the rotating shaft 19. Gear parameters: the transmission gear 20 on the rotating cylinder 24 (e.g., 48 teeth, module 3) is larger than the transmission gear 20 on the rotating shaft 19 (e.g., 24 teeth, module 3). The drive gear 23 (e.g., 24 teeth) simultaneously meshes with both transmission gears 20. Speed ​​matching: when the drive gear 23 rotates at speed n, the rotating shaft 19 rotates at speed n (transmission ratio 1:1), and the rotating cylinder 24 rotates at speed n / 2 (transmission ratio 2:1), causing the linear speed of the blade 27 (mounted on the rotating shaft 19) to be... The optimal combination of airflow classification (12-15 m / s) and scraper linear velocity (6-7.5 m / s) ensures both airflow classification effect and scraper removal efficiency. Grinding stage: Material falls from the feed inlet 29 into the receiving tray 3. The first motor 2 drives the main unit's pergola frame 10 to rotate. The grinding roller 5 crushes the grinding ring 8, and the scraper 4 continuously feeds the material into the grinding zone. The blower 7 delivers air through the outlet 9, blowing up the ground material. Fine powder enters the analyzer with the airflow, while coarse powder falls back for further grinding. Classification and cleaning stage: The second motor 21 drives the drive gear 23, and the rotating shaft 19 drives... The blade 27 rotates (e.g., at 180-220 rpm), generating an upward airflow that, in conjunction with the analyzer, performs particle size classification. Qualified fine powder is discharged from the discharge pipe 25. The rotating drum 24 drives the scraper to rotate at (e.g., at 90-110 rpm). The return spring 16 ensures the scraper adheres to the polypropylene inner shell 12, scraping off adhering material. The material falls and re-engages in grinding. Maintenance: Press the spring clip 28 on the scraper surface to remove the old scraper and install the new one. No tools are required throughout the process, significantly reducing scraper replacement time. Grinding efficiency: Three sets of grinding rollers with 5+ airflow classification design. Compared to traditional single-roll mills, this technology offers 1.5 times the cleaning efficiency; the scraper rotation and 16-spring return design reduce material residue in the inner shell, improve analyzer negative pressure stability, and reduce equipment vibration amplitude; maintenance costs are reduced due to the scraper snap-fit ​​design, which shortens maintenance time and extends the lifespan of the polypropylene material, resulting in lower overall maintenance costs; through the synergistic innovation of mechanical transmission and pneumatic systems, this Raymond mill achieves integrated and efficient operation of grinding, grading, and cleaning, breaking through the bottlenecks of easy material accumulation on the inner wall and complex maintenance of traditional equipment, and significantly improving the automation level and economic benefits of industrial grinding.

[0038] Working Principle: In actual use, the raw material for grinding can be added through the feed inlet 29 on the side of the grinding machine body 1. The falling material will land on the receiving tray 3 inside the grinding machine body 1. Then, the operation of the first motor 2 can drive the main frame 10 to rotate, so that the three sets of grinding rollers 5 can contact the grinding ring 8 under the action of centrifugal force and rotational force, and together with the rotating scraper 4, the raw material is crushed and ground. At the same time, the fan 7 on the outside of the grinding machine body 1 can introduce gas inward through the air supply pipe 6 and the air outlet 9. The introduced gas will act on the grinding... The material is ground and then blown up, causing it to rise. The lighter portion of the rising material can be discharged through the discharge pipe 25, while the heavier portion can fall back onto the receiving tray 3 for processing. During the material rising and sorting process, the operation of the second motor 21 drives the drive shaft 22 to rotate. The rotating drive shaft 22 drives the drive gear 23 on its surface to rotate synchronously. The side of the drive gear 23 is connected to the transmission gear 20 on the surface of the rotating shaft 19 and the rotating cylinder 24, respectively. The rotating shaft 19 drives the blades 27 to rotate. This generates gas suction to assist in material sorting. The rotating drum 24 drives the fixed rod 17 on its surface to rotate along the inner wall of the analyzer body 11, thereby allowing the polypropylene scraper 13 to remove the material adhering to the polypropylene inner shell 12. This prevents material adhesion from causing incomplete material processing and ensures the overall operating effect. At the same time, the polypropylene material can effectively reduce the generation of static electricity and avoid the adsorption effect of static electricity, thereby improving the overall removal effect. Furthermore, the rotating drum 24 is rotatably connected to the rotating shaft 19, and the transmission gear 20 structure on the surface of the rotating shaft 19 is connected to the drive gear 22 on the surface of the drive shaft 22. The moving gear 23 can be configured in a matching manner, such as a 1:1 ratio, while the dimensions of the rotating shaft 19 and the drive cylinder can be configured in a 1:2 or 1:3 ratio. By changing the gears, the rotation speed of the drive cylinder is reduced, avoiding excessive speed from affecting the airflow effect generated by the blades 27 and ensuring the quality of the structure. At the same time, the scraper and the fixed plate 14 are connected by a snap-fit, which allows for quick disassembly and maintenance when damage occurs. This reduces the labor intensity of personnel, improves maintenance efficiency and convenience, and facilitates better use. The device as a whole has the advantages of cleaning the inner wall, removing adhering materials, and convenient scraper maintenance.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-roller high-efficiency Raymond mill, comprising a grinder body (1) and an analyzer body (11), characterized in that, An analyzer body (11) is installed at the top of the grinding machine body (1). A polypropylene inner shell (12) is installed on the inner wall of the analyzer body (11). The surface of the polypropylene inner shell (12) is in contact with a polypropylene scraper (13). One end of the polypropylene scraper (13) is engaged with a fixing plate (14) by a spring clip (28) and a slot (26). The spring clip (28) is located on the surface of the polypropylene scraper (13), and the slot (26) is located on the corresponding position on the surface of the fixing plate (14). A limit rod (15) is welded to one end of the fixing plate (14). The limit rod (15) is slidably connected to the fixing rod (17). A protective cover (18) is installed at the middle of the top of the analyzer body (11). The protective cover (18) is rotatably connected to a rotating shaft (19) in the middle position inside. The rotating shaft (19) is rotatably connected to a rotating cylinder (24) on its outer periphery. One end of the rotating shaft (19) passes through one side of the analyzer body (11) and is connected to the blade (27). One end of the rotating cylinder (24) passes through one side of the analyzer body (11) and is connected to the fixed rod (17). Transmission gears (20) are installed on the surface of the rotating cylinder (24) and the surface of the rotating shaft (19). One end of the transmission gears (20) is meshed with a drive gear (23). The drive gear (23) is located on the drive shaft (22). One end of the drive shaft (22) passes through one side of the protective cover (18) and is connected to the second motor (21).

2. The three-roll high-efficiency Raymond mill according to claim 1, characterized in that, The grinding machine body (1) is equipped with a receiving tray (3) inside. The receiving tray (3) is equipped with a main frame (10) in the middle. One end of the main frame (10) passes through the receiving tray (3) and is connected to the first motor (2). Several sets of grinding rollers (5) are installed on the main frame (10). A grinding ring (8) is installed around the outer periphery of the grinding roller (5) at the top of the receiving tray (3). Several sets of scrapers (4) are installed on one side of the grinding roller (5) on the main frame (10).

3. The three-high Raymond mill of claim 1, wherein, An air supply pipe (6) is installed on the outer surface of the grinding machine body (1). A fan (7) is installed in the air inlet area of ​​the air supply pipe (6). An air outlet (9) is provided at the contact position between the air outlet area of ​​the air supply pipe (6) and the surface of the grinding machine body (1).

4. The three-roll high-efficiency Raymond mill of claim 1, wherein, The analyzer body (11) is equipped with a discharge pipe (25) on one side of the top.

5. The three-high Raymond mill of claim 1, wherein, The grinding machine body (1) has a feed inlet (29) installed at an angle on one side surface.

6. The three-high Raymond mill of claim 1, wherein, The fixed rod (17) has a cavity at the contact position with the limiting rod (15), and a return spring (16) is installed inside the cavity. The two ends of the return spring (16) are fixedly connected to the inner wall of the cavity and the surface of the limiting rod (15), respectively.

7. The three-high Raymond mill of claim 2, wherein, The grinding rollers (5) are provided in three sets.

8. The three-high Raymond mill of claim 1, wherein, The size of the transmission gear (20) on the surface of the rotating cylinder (24) is larger than the size of the transmission gear (20) on the surface of the rotating shaft (19).

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