A pectin grinding device

Abstract

The invention relates to the technical field of pectin grinding, in particular to a pectin grinding device, comprising a grinding box, a grinding mechanism is arranged inside the grinding box, a cooling mechanism is arranged inside the grinding box and above the grinding mechanism, a controller is installed on the outer wall of the grinding box, and a power plug is fixedly connected to the outer wall of the grinding box near the controller; the grinding mechanism comprises a driving shaft rotatably connected to the inside of the grinding box, a grinding disc is slidably connected to the outer wall of the driving shaft and inside the grinding box, and a connecting ring is fixedly connected to the top of the grinding disc and above the driving shaft. By designing a pectin grinding device, raw materials are ground by using the grinding mechanism in the device, thereby solving the problem that when the existing grinding equipment grinds the raw materials, raw material residues will adhere to the inner wall of the grinding equipment, and in order to prevent the residues from affecting the subsequent grinding of the raw materials, manual cleaning is required, and the cleaning operation is time-consuming and laborious.

Description

Technical Field

[0001] The invention relates to the technical field of pectin grinding, in particular to a pectin grinding device. Background Art

[0002] The pectin grinding device is a device used to grind pectin raw materials, but the existing pectin grinding device still has shortcomings. Specifically, when the existing grinding equipment grinds the raw materials, the raw material residue will adhere to the inner wall of the grinding equipment. In order to prevent the residue from affecting the subsequent grinding of the raw materials, manual cleaning is required, and the cleaning operation is time-consuming and labor-intensive.

[0003] Therefore, a pectin grinding device is needed to solve the problems raised in the above background technology. Summary of the Invention

[0004] The object of the present invention is to provide a pectin grinding device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pectin grinding device comprises a grinding box, a grinding mechanism disposed inside the grinding box, a cooling mechanism disposed inside the grinding box and above the grinding mechanism, a controller mounted on an outer wall of the grinding box, and a power plug fixedly connected to the outer wall of the grinding box near the controller;

[0007] The grinding mechanism includes a driving shaft rotatably connected to the inside of the grinding box, a grinding disc slidably connected to the outer wall of the driving shaft and inside the grinding box, a connecting ring fixedly connected to the top of the grinding disc and above the driving shaft, a connecting rod slidably connected to the inside of the connecting ring, an electric push rod fixedly connected to the top of the connecting rod and above the grinding disc, a scraper slidably connected to the inside of the grinding box and above the grinding disc, an electric slide fixedly connected to the inside of the grinding box and below the scraper, a slide table is installed on the top of the electric slide and at the corresponding position of the scraper, and the inside of the grinding box A support plate is rotatably connected to the bottom of the grinding disc, a rotating shaft is fixedly connected to the inside of the support plate at a position away from the grinding disc, a servo motor is fixedly connected to the outer wall of the grinding box at a corresponding position of the rotating shaft, a sealing gasket is fixedly connected to the inside of the grinding box at a position close to the support plate, a cleaning nozzle is fixedly connected to the inside of the grinding box above the rotating shaft, a guide pipe is fixedly connected to the outer wall of the cleaning nozzle, a baffle is fixedly connected to the top of the inner wall of the grinding box at a position close to the grinding disc, and a limiting block 216 is fixedly connected to the top of the grinding disc at a position close to the drive shaft.

[0008] As a preferred solution of the present invention, the cooling mechanism includes a fixed sleeve fixedly connected to the top of the inner wall of the grinding box, the outer wall of the fixed sleeve is rotatably connected to a connecting sleeve, the bottom of the inner wall of the connecting sleeve is fixedly connected to a cooling pipe, the inner wall of the cooling pipe is slidably connected to a connecting pipe, a feed hopper is fixedly connected to the right side of the top center of the grinding box, a drive motor is fixedly connected to the top center of the grinding box, the outer wall of the fixed sleeve is fixedly connected to an air intake pipe, guide grooves are provided inside the fixed sleeve and the connecting sleeve, an exhaust pipe is fixedly connected to the top of the fixed sleeve and on the right side of the air intake pipe, and sealing rings are fixedly connected to the outer walls of the fixed sleeve and the connecting pipe.

[0009] As a preferred solution of the present invention, the grinding box is made of aluminum alloy, and the connection between the power plug and the controller is electrical connection.

[0010] As a preferred solution of the present invention, the grinding disc, connecting ring, scraper, and support plate are all made of stainless steel. The grinding disc is designed as a frustum-shaped structure. The connection between the electric push rod and the grinding box, the slide and the scraper, and the rotating shaft and the servo motor are all fixed connections.

[0011] As a preferred solution of the present invention, the sealing gasket is made of silicone, the rotating shaft, scraper, support plate and guide tube are each provided in two groups, and the connection between the baffle and the grinding disc, and the limit block and the drive shaft are all sliding connections.

[0012] As a preferred solution of the present invention, the guide pipe passes through and extends outside the grinding box, the length of the scraper is adapted to the radius of the grinding disc, multiple groups of cleaning nozzles are provided, and multiple groups of cleaning nozzles are tiltedly arranged in the grinding box, the connecting rod is a convex structure design, the connection method between the rotating shaft and the grinding box is a rotational connection, and the connection method between the electric push rod, electric slide rail, servo motor and controller are all electrical connections.

[0013] As a preferred solution of the present invention, the fixed sleeve, connecting sleeve, cooling pipe and connecting pipe are all made of aluminum alloy, the connecting pipe passes through the cooling pipe and extends into the grinding disc, the connecting pipe and cooling pipe are provided in multiple groups, and the sealing ring is made of silicone.

[0014] As a preferred solution of the present invention, the air inlet pipe passes through the fixed sleeve and extends outside the grinding box, the drive motor and the drive shaft are connected in a fixed manner, and the drive motor and the controller are connected in an electrical manner.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, a pectin grinding device is designed, and the grinding mechanism in the device is used to grind the raw materials. The raw materials are put into the feed hopper, and the raw materials in the feed hopper fall downward to the top of the support plate. The controller starts the drive motor and the electric push rod. The electric push rod pushes the grinding disc downward through the connecting rod. The descending grinding disc presses the pectin raw materials on the top of the support plate. At the same time, the drive motor drives the drive shaft and the grinding disc to rotate through the connecting shaft. The rotating grinding disc grinds the pectin raw materials on the top of the support plate. After the grinding is completed, the electric push rod pushes the grinding disc upward through the connecting rod. The grinding disc rises above the scraper, and the controller starts the servo motor and the electric slide rail. The scraper will be driven to move outward through the slide, and the scraper will move to the grinding disc upward, and the scraper will scrape off the raw material residue attached to the grinding disc. The servo motor will drive the support plate to rotate downward through the rotating shaft, and the support plate will no longer seal the grinding box. The ground pectin raw materials will slide down along the support plate, and high-pressure air will be sent into the guide tube. The high-pressure air in the guide tube will be ejected through the cleaning nozzle, and the broken high-speed air flow will wash away the raw material residue remaining on the support plate. The raw material residue is easier to clean, which solves the problem that the raw material residue in the existing grinding equipment will adhere to the inner wall of the grinding equipment when grinding the raw materials. In order to prevent the residue from affecting the subsequent grinding of the raw materials, manual cleaning is required, and the cleaning operation is time-consuming and labor-intensive.

[0017] 2. In the present invention, a pectin grinding device is designed, and the cooling mechanism in the device is used to cool the grinding disc. Low-temperature gas is injected into the air inlet pipe. The low-temperature gas in the air inlet pipe will flow into the fixed sleeve and flow into the connecting sleeve along the guide groove in the fixed sleeve. The low-temperature gas in the connecting sleeve will flow into the cooling pipe and flow into the grinding disc along the connecting pipe. The low-temperature gas flowing into the grinding disc will absorb heat, thereby reducing the temperature of the grinding disc. The gas that has absorbed heat flows out of the grinding disc through the exhaust pipe, which is convenient for cooling the grinding disc. This solves the problem that the temperature of the existing grinding disc rises after long-term grinding, and the high-temperature grinding disc is prone to damage the raw materials during grinding.

[0018] 3. In the present invention, a pectin grinding device is designed, in which an electric push rod and a connecting rod are used to drive the grinding disc to move up and down. When the grinding disc grinds the raw material, the electric push rod drives the connecting ring and the grinding disc to move up and down through the connecting rod. The repeatedly pressed grinding disc can crush the raw material and improve the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a front cross-sectional view of the present invention;

[0021] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the cooling mechanism of the present invention;

[0024] Figure 6 This is an exploded view of the three-dimensional structure of the cooling mechanism of the present invention.

[0025] In the figure: 1. Grinding box; 2. Grinding mechanism; 3. Cooling mechanism; 4. Controller; 5. Power plug; 201. Drive shaft; 202. Grinding disc; 203. Connecting ring; 204. Connecting rod; 205. Electric push rod; 206. Scraper; 207. Electric slide rail; 208. Slide; 209. Support plate; 210. Rotating shaft; 211. Servo motor; 212. Sealing gasket; 213. Cleaning nozzle; 214. Guide pipe; 215. Baffle; 216. Limit block; 301. Fixed sleeve; 302. Connecting sleeve; 303. Cooling pipe; 304. Connecting pipe; 305. Feed hopper; 306. Drive motor; 307. Inlet pipe; 308. Guide trough; 309. Exhaust pipe; 310. Sealing ring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] For examples, see Figure 1-6 , the present invention provides a technical solution:

[0031] A pectin grinding device includes a grinding box 1, a grinding mechanism 2 is provided inside the grinding box 1, a cooling mechanism 3 is provided inside the grinding box 1 and above the grinding mechanism 2, a controller 4 is installed on the outer wall of the grinding box 1, and a power plug 5 is fixedly connected to the outer wall of the grinding box 1 near the controller 4;

[0032] The grinding box 1 is made of aluminum alloy, and the connection between the power plug 5 and the controller 4 is electrical connection;

[0033] In this embodiment, reference Figure 2 and Figure 3 The grinding mechanism 2 includes a driving shaft 201 rotatably connected to the inside of the grinding box 1, a grinding disc 202 is slidably connected to the outer wall of the driving shaft 201 and inside the grinding box 1, a connecting ring 203 is fixedly connected to the top of the grinding disc 202 and above the driving shaft 201, a connecting rod 204 is slidably connected to the inside of the connecting ring 203, an electric push rod 205 is fixedly connected to the top of the connecting rod 204 and above the grinding disc 202, a scraper 206 is slidably connected to the inside of the grinding box 1 and above the grinding disc 202, an electric slide rail 207 is fixedly connected to the inside of the grinding box 1 and below the scraper 206, a slide table 208 is installed on the top of the electric slide rail 207 and at the corresponding position of the scraper 206, and the grinding box 1 is provided with a plurality of screwdrivers. A support plate 209 is rotatably connected inside and below the grinding disc 202, a rotating shaft 210 is fixedly connected inside the support plate 209 and at a position away from the grinding disc 202, a servo motor 211 is fixedly connected to the outer wall of the grinding box 1 and at a position corresponding to the rotating shaft 210, a sealing gasket 212 is fixedly connected inside the grinding box 1 and near the support plate 209, a cleaning nozzle 213 is fixedly connected inside the grinding box 1 and above the rotating shaft 210, a guide pipe 214 is fixedly connected to the outer wall of the cleaning nozzle 213, a baffle 215 is fixedly connected to the top of the inner wall of the grinding box 1 and at a position close to the grinding disc 202, and a limit block 216 is fixedly connected to the top of the grinding disc 202 and at a position close to the drive shaft 201;

[0034] The grinding disc 202, the connecting ring 203, the scraper 206, and the supporting plate 209 are all made of stainless steel. The grinding disc 202 is a frustum-shaped structure. The electric push rod 205 and the grinding box 1, the slide 208 and the scraper 206, and the rotating shaft 210 and the servo motor 211 are all connected in a fixed manner. The sealing gasket 212 is made of silicone. The rotating shaft 210, the scraper 206, the supporting plate 209 and the guide tube 214 are all provided with two groups. The baffle 215 and the grinding disc 202 and the limit block 216 and the drive shaft 201 are all connected in a sliding manner. The guide tube 214 passes through and extends to the outside of the grinding box 1. The length of the scraper 206 is adapted to the radius of the grinding disc 202. There are multiple groups of cleaning nozzles 213, and the multiple groups of cleaning nozzles 213 are tilted in the grinding box 1. The connecting rod 204 is a convex structure. The connection method of the rotating shaft 210 and the grinding box 1 is a rotating connection. 05. The connection between the electric slide 207, the servo motor 211 and the controller 4 is electrically connected. After the grinding is completed, the electric push rod 205 pushes the grinding disc 202 to move upward through the connecting rod 204, and the grinding disc 202 rises above the scraper 206. The controller 4 starts the servo motor 211 and the electric slide 207. The electric slide 207 will drive the scraper 206 to move outward through the slide 208. The scraper 206 moves to the bottom of the grinding disc 202. The scraper 206 will scrape off the raw material residue attached to the bottom of the rotating grinding disc 202. The servo motor 211 will drive the support plate 209 to rotate downward through the rotating shaft 210. The support plate 209 no longer seals the grinding box 1. The ground pectin raw material slides down along the support plate 209, sending high-pressure air into the guide pipe 214. The high-pressure air in the guide pipe 214 is ejected through the cleaning nozzle 213. The ejected high-speed air flow will wash away the raw material residue remaining on the support plate 209.

[0035] In this embodiment, reference Figure 2 、 Figure 4 、 Figure 5 as well as Figure 6 The cooling mechanism 3 includes a fixed sleeve 301 fixedly connected to the top of the inner wall of the grinding box 1, the outer wall of the fixed sleeve 301 is rotatably connected to the connecting sleeve 302, the bottom of the inner wall of the connecting sleeve 302 is fixedly connected to the cooling pipe 303, the inner wall of the cooling pipe 303 is slidably connected to the connecting pipe 304, a feed hopper 305 is fixedly connected to the right side of the top center of the grinding box 1, a drive motor 306 is fixedly connected to the top center of the grinding box 1, the outer wall of the fixed sleeve 301 is fixedly connected to the air intake pipe 307, the interior of the fixed sleeve 301 and the connecting sleeve 302 are both provided with a guide groove 308, the top of the fixed sleeve 301 and the right side of the air intake pipe 307 are fixedly connected to the exhaust pipe 309, and the outer walls of the fixed sleeve 301 and the connecting pipe 304 are fixedly connected to a sealing ring 310;

[0036] The fixed sleeve 301, the connecting sleeve 302, the cooling pipe 303 and the connecting pipe 304 are all made of aluminum alloy. The connecting pipe 304 passes through the cooling pipe 303 and extends into the grinding disc 202. There are multiple groups of connecting pipes 304 and cooling pipes 303. The sealing ring 310 is made of silicone. The intake pipe 307 passes through the fixed sleeve 301 and extends to the outside of the grinding box 1. The connection between the drive motor 306 and the drive shaft 201 is fixedly connected. The connection between the drive motor 306 and the controller 4 is electrically connected. The low-temperature gas is injected into the intake pipe 307. 07, the low-temperature gas in the air intake pipe 307 will flow into the fixed sleeve 301, and the low-temperature gas will flow into the connecting sleeve 302 along the guide groove 308 in the fixed sleeve 301. The low-temperature gas in the connecting sleeve 302 will flow into the cooling pipe 303 and flow into the grinding disc 202 along the connecting pipe 304. The low-temperature gas flowing into the grinding disc 202 will absorb heat and reduce the temperature of the grinding disc 202. The exhaust pipe 309 is connected to the vacuum pump, and the vacuum pump extracts the cooling gas that has absorbed heat in the grinding disc 202 through the exhaust pipe 309.

[0037] The working process of the present invention is as follows: when the pectin grinding device designed by the present invention is in operation, the raw materials are put into the feed hopper 305, the raw materials in the feed hopper 305 slide downward into the grinding box 1 and finally fall on the top of the support plate 209, the controller 4 starts the drive motor 306 and the electric push rod 205, the electric push rod 205 pushes the grinding disc 202 to move downward through the connecting rod 204, the descending grinding disc 202 presses the pectin raw materials on the top of the support plate 209, the drive motor 306 drives the drive shaft 201 and the grinding disc 202 to rotate, the rotating grinding disc 202 grinds the pectin raw materials on the top of the support plate 209, and at the same time the electric push rod 205 drives the grinding disc 202 to slide up and down continuously through the connecting rod 204, the repeatedly pressed grinding disc 202 crushes the pectin raw materials on the support plate 209, thereby improving the grinding effect;

[0038] At the same time, low-temperature gas is injected into the air inlet pipe 307. The low-temperature gas in the air inlet pipe 307 flows into the fixed sleeve 301, and flows into the connecting sleeve 302 along the guide groove 308 in the fixed sleeve 301. The low-temperature gas in the connecting sleeve 302 flows into the cooling pipe 303 and flows into the grinding disc 202 along the connecting pipe 304. The low-temperature gas flowing into the grinding disc 202 absorbs heat, thereby reducing the temperature of the grinding disc 202. The exhaust pipe 309 is connected to the air pump, and the air pump extracts the cooling gas that has absorbed heat from the grinding disc 202 through the exhaust pipe 309.

[0039] After the grinding is completed, the electric push rod 205 pushes the grinding disc 202 to move upward through the connecting rod 204, and the grinding disc 202 rises above the scraper 206. The controller 4 starts the servo motor 211 and the electric slide 207. The electric slide 207 will drive the scraper 206 to move outward through the slide 208. The scraper 206 moves to the bottom of the grinding disc 202. The scraper 206 will scrape off the raw material residue attached to the bottom of the rotating grinding disc 202. The servo motor 211 will drive the support plate 209 to rotate downward through the rotating shaft 210. The support plate 209 no longer seals the grinding box 1. The ground pectin raw material slides downward along the support plate 209, and the high-pressure air is sent into the guide tube 214. The high-pressure air in the guide tube 214 is ejected through the cleaning nozzle 213, and the ejected high-speed air flow will wash away the raw material residue remaining on the support plate 209.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pectin grinding device, comprising a grinding box (1), characterized in that: A grinding mechanism (2) is arranged inside the grinding box (1); a cooling mechanism (3) is arranged inside the grinding box (1) and above the grinding mechanism (2); a controller (4) is installed on the outer wall of the grinding box (1); and a power plug (5) is fixedly connected to the outer wall of the grinding box (1) and at a position close to the controller (4); The grinding mechanism (2) comprises a driving shaft (201) rotatably connected to the inside of a grinding box (1); a grinding disc (202) is slidably connected to the outer wall of the driving shaft (201) and inside the grinding box (1); a connecting ring (203) is fixedly connected to the top of the grinding disc (202) and above the driving shaft (201); a connecting rod (204) is slidably connected to the inside of the connecting ring (203); an electric push rod (205) is fixedly connected to the top of the connecting rod (204) and above the grinding disc (202); a scraper (206) is slidably connected to the inside of the grinding box (1) and above the grinding disc (202); an electric slide rail (207) is fixedly connected to the inside of the grinding box (1) and below the scraper (206); a slide table (208) is installed on the top of the electric slide rail (207) and at a position corresponding to the scraper (206); and the grinding box A support plate (209) is rotatably connected inside the grinding box (1) and below the grinding disc (202); a rotating shaft (210) is fixedly connected inside the support plate (209) and at a position away from the grinding disc (202); a servo motor (211) is fixedly connected to the outer wall of the grinding box (1) and at a position corresponding to the rotating shaft (210); a sealing gasket (212) is fixedly connected inside the grinding box (1) and at a position close to the support plate (209); a cleaning nozzle (213) is fixedly connected inside the grinding box (1) and above the rotating shaft (210); a flow guide tube (214) is fixedly connected to the outer wall of the cleaning nozzle (213); a baffle (215) is fixedly connected to the top of the inner wall of the grinding box (1) and at a position close to the grinding disc (202); and a limiting block (216) is fixedly connected to the top of the grinding disc (202) and at a position close to the driving shaft (201); The cooling mechanism (3) comprises a fixed sleeve (301) fixedly connected to the top of the inner wall of the grinding box (1); the outer wall of the fixed sleeve (301) is rotatably connected to a connecting sleeve (302); the bottom of the inner wall of the connecting sleeve (302) is fixedly connected to a cooling pipe (303); the inner wall of the cooling pipe (303) is slidably connected to a connecting pipe (304); a feed hopper (305) is fixedly connected to the right side of the center of the top of the grinding box (1); A driving motor (306) is fixedly connected at the center of the fixed sleeve (301); an air intake pipe (307) is fixedly connected to the outer wall of the fixed sleeve (301); guide grooves (308) are provided inside the fixed sleeve (301) and the connecting sleeve (302); an exhaust pipe (309) is fixedly connected to the top of the fixed sleeve (301) and on the right side of the air intake pipe (307); and a sealing ring (310) is fixedly connected to the outer walls of the fixed sleeve (301) and the connecting pipe (304); The connecting pipe (304) passes through the cooling pipe (303) and extends into the grinding disc (202).

2. The pectin grinding device according to claim 1, characterized in that: The grinding box (1) is made of aluminum alloy, and the connection between the power plug (5) and the controller (4) is electrical connection.

3. The pectin grinding device according to claim 1, characterized in that: The grinding disc (202), the connecting ring (203), the scraper (206), and the supporting plate (209) are all made of stainless steel. The grinding disc (202) is of a frustum-shaped structural design. The electric push rod (205) and the grinding box (1), the slide table (208) and the scraper (206), and the rotating shaft (210) and the servo motor (211) are all connected in a fixed manner.

4. The pectin grinding device according to claim 1, characterized in that: The sealing pad (212) is made of silicone. The rotating shaft (210), the scraper (206), the support plate (209) and the guide tube (214) are each provided in two groups. The baffle plate (215) and the grinding disc (202) as well as the limit block (216) and the driving shaft (201) are connected in a sliding manner.

5. The pectin grinding device according to claim 1, characterized in that: The guide tube (214) passes through and extends outside the grinding box (1); the length of the scraper (206) is adapted to the radius of the grinding disc (202); a plurality of cleaning nozzles (213) are provided, and the plurality of cleaning nozzles (213) are obliquely arranged in the grinding box (1); the connecting rod (204) is designed as a convex structure; the connection method of the rotating shaft (210) and the grinding box (1) is a rotational connection; and the connection method of the electric push rod (205), the electric slide rail (207), the servo motor (211) and the controller (4) are all electrical connections.

6. The pectin grinding device according to claim 2, characterized in that: The fixed sleeve (301), the connecting sleeve (302), the cooling pipe (303) and the connecting pipe (304) are all made of aluminum alloy, the connecting pipe (304) and the cooling pipe (303) are provided in multiple groups, and the sealing ring (310) is made of silicone.

7. The pectin grinding device according to claim 2, characterized in that: The air inlet pipe (307) passes through the fixed sleeve (301) and extends to the outside of the grinding box (1); the driving motor (306) and the driving shaft (201) are connected in a fixed manner; and the driving motor (306) and the controller (4) are connected in an electrical manner.

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