Safe grinding device

Abstract

The utility model relates to the technical field of disperse dye grinding, in particular to a safe grinding device which comprises a box body, an upper sealing cover is installed at the upper end of the box body, a through round hole is formed in the middle of the upper sealing cover, a heat dissipation pipe is installed in the round hole in a clamped and rotating mode, a feeding port is installed at one corner of the upper sealing cover, and a lower sealing plate is installed at the lower end of the box body. A discharging opening is formed in the lower sealing plate, a grinding disc is fixedly installed on the outer wall of the heat dissipation pipe in the box body, a grinding wheel is installed on the side wall of the heat dissipation pipe in the box body in the vertical direction in a clamped and sliding mode, an inclined sliding plate is installed on the portion, located above the grinding wheel, of the inner wall of the box body, and a heat dissipation assembly is installed on the heat dissipation pipe and used for dissipating heat of the grinding wheel. A cleaning assembly is installed in the grinding wheel and used for cleaning the surface, connected with the grinding disc, of the grinding wheel, and the safe grinding device aims at solving the problems that a disperse dye grinding device is poor in heat dissipation and difficult to clean.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disperse dyes grinding, especially relates to a safe grinding device. BACKGROUND

[0002] In the production process of disperse dyes and other powder materials, the grinding device is an indispensable key equipment. The traditional grinding device usually realizes the fine grinding of materials through the relative movement of the grinding wheel and the grinding disc, but in the process of long-time continuous operation, the heat generated by the friction between the grinding wheel and the grinding disc is difficult to dissipate in time, which leads to the temperature rise of the grinding parts, not only affects the grinding efficiency, but also may accelerate the equipment wear and tear and shorten the service life. At the same time, the fine powder generated in the grinding process is easy to adhere to the surface of the grinding wheel and the grinding disc, which affects the grinding quality and the stability of the equipment operation.

[0003] In the prior art, the Chinese patent document with publication number CN222490203U proposes a safe grinding device, which is provided with a bottom plate, the upper surface of the bottom plate is fixedly connected with a grinding box, the inner wall of the grinding box is fixedly connected with a feeding assembly and a grinding assembly, two sliding grooves are formed in the right inner wall of the grinding box, a filter plate is arranged in the interior of the grinding box, the right surface of the filter plate is fixedly connected with two sliding rods, the right ends of the two sliding rods respectively extend into the interiors of the two sliding grooves, the upper and lower surfaces of the sliding rods are respectively fixedly connected with springs, the opposite ends of the two springs are respectively fixedly connected with the upper and lower inner walls of the sliding grooves, and the filter plate is arranged in an inclined manner, so that the disperse dyes with larger particles can be transported into the collecting assembly through the inclined filter plate after grinding, which can avoid the mixing of dyes with larger particles and normal dyes after processing, thereby reducing the overall quality. However, like the conventional technology, it cannot handle the heat temperature problem generated by the friction between the grinding wheel and the grinding disc, and the fine powder generated in the grinding process is easy to adhere to the surface of the grinding wheel and the grinding disc, which has poor practicability. Therefore, the utility model discloses a safe grinding device to solve the problems of poor heat dissipation and cleaning difficulty of the disperse dyes grinding device. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims to provide a safe grinding device to solve the problems of poor heat dissipation and cleaning difficulty of the disperse dyes grinding device.

[0005] Based on the above purpose, the utility model provides a kind of safe grinding device, comprising: box, the upper end of the box is equipped with upper cover, the middle part of the upper cover is equipped with through hole, the heat pipe is rotatably mounted in the through hole, the corner of the upper cover is equipped with feed inlet, the lower end of the box is equipped with lower sealing plate, the lower sealing plate is equipped with discharge outlet, the heat pipe outer wall in the box is fixedly installed with grinding disc, and the heat pipe side wall in the box is vertically direction and is slidably installed with grinding wheel, the inner wall of the box is located above grinding wheel and is equipped with inclined slide, the position of the lower end of the inclined slide and the grinding wheel is equipped with anti-flow ring, the inner wall of the anti-flow ring and the top outer wall of the grinding wheel are consistent, and the upper cover is equipped with protective support, except the surface close to the upper cover of the protective support, dust cover is installed on every surface of protective support, the upper end of the heat pipe protrudes from the upper cover, the heat pipe is equipped with heat dissipation assembly, and the heat dissipation assembly is used to heat dissipation for the grinding wheel;Cleaning assembly is installed in the grinding wheel, and the cleaning assembly is used to clean the surface of the grinding wheel and the grinding disc.

[0006] Preferably, the top end of the heat pipe is equipped with fan-shaped air inlet, a plurality of first fixing frames are installed on the fan-shaped air inlet, a plurality of fans are installed on the plurality of first fixing frames, the outer wall of the heat pipe above the upper cover is equipped with second belt pulley, the second fixing frame is installed on the upper cover on one side of the heat pipe, and the other end of the second fixing frame is equipped with servo motor, the output end of the servo motor is equipped with first belt pulley, and the first belt pulley and the second belt pulley are equipped with belt.

[0007] Preferably, the inner wall of the heat pipe is equipped with a plurality of heat dissipation fins at the position of the grinding wheel, the lower end of the heat pipe penetrates the lower sealing plate and protrudes from the lower sealing plate, the lower sealing plate is equipped with a hole with the same diameter as the outer wall of the heat pipe at the position corresponding to the heat pipe, and the lower end of the heat pipe is equipped with a fan-shaped air outlet.

[0008] Preferably, the heat dissipation channel is vertically direction and is spiral-shaped in the grinding wheel, and the uppermost end of the heat dissipation channel is equipped with an air inlet circular channel in the grinding wheel, the other end of the circular channel is connected to the position where the grinding wheel and the heat pipe meet, the inner wall of the heat pipe is equipped with a through hole with the same diameter as the circular channel at the position corresponding to the circular channel, the lower end of the heat dissipation channel is connected with the air storage chamber, the air storage chamber is arranged in the bottom end of the grinding wheel, and a one-way air inlet valve is installed at the position where the heat dissipation channel and the air storage chamber are connected.

[0009] Preferably, the cleaning assembly comprises a mounting sleeve, one end of the mounting sleeve is mounted in the inner wall of the top end of the gas storage chamber, and the other end of the mounting sleeve is slidably inserted with a vertical guide rod, the other end of the vertical guide rod is provided with a gas injection cylinder, the gas injection cylinder is provided with a limiting block at one end close to the vertical guide rod, a gas injection channel is formed in the gas injection cylinder, a vertical spring is sleeved and mounted on the mounting sleeve, one end of the vertical spring is abutted and mounted on the inner wall of the top of the gas storage chamber, and the other end of the vertical spring is abutted and mounted on the top side wall of the limiting block.

[0010] Preferably, the gas injection channel is in a cross shape at the top of the gas injection cylinder, and the gas injection channel is in a cross shape at the bottom of the gas injection cylinder, and the gas injection channel at the top of the gas injection cylinder and the gas injection channel at the bottom of the gas injection cylinder are centrally provided with a connecting circular hole channel, and the bottom of the grinding wheel is provided with a through hole with the same diameter as the gas injection cylinder at the position corresponding to the gas injection cylinder, and the diameter of the limiting block is larger than that of the through hole.

[0011] Preferably, the outer wall of the grinding wheel is provided with a limiting ring, a handle is slidably mounted on the side wall of the grinding wheel below the limiting ring, the other end of the handle penetrates and protrudes from the side wall of the box, a vertical rectangular hole is formed in the box at the position corresponding to the handle, and a supporting column is mounted at each of the four corners of the lower end of the box.

[0012] The utility model discloses the beneficial effects of:

[0013] The heat dissipation assembly adopts the design of combining the heat dissipation pipe with the fan, the fan is rotated by the servo motor driving the belt pulley, forced convection is formed, the heat generated during the grinding process is effectively and quickly led out, and the working temperature of the grinding part is reduced. A plurality of heat dissipation fins are mounted on the inner wall of the heat dissipation pipe, the heat dissipation area is increased, and the heat dissipation efficiency is improved. The spring-shaped heat dissipation channel is formed in the grinding wheel and is communicated with the through hole in the heat dissipation pipe, forming a complete heat dissipation loop, and the heat dissipation effect is further enhanced. The cleaning assembly adopts the design of combining the gas injection cylinder with the vertical spring, when the grinding wheel stops rotating, the vertical spring pushes the gas injection cylinder to move downward, the gas injection channel is aligned with the surface where the grinding wheel and the grinding disc are connected, and automatic cleaning is realized. The gas injection channel in the gas injection cylinder is designed in a cross shape, which can uniformly spray cleaning gas and improve the cleaning effect. The design of the limiting ring and the handle facilitates the operator to control the lifting of the grinding wheel. The effective combination of the heat dissipation and automatic cleaning functions of the utility model significantly improves the grinding efficiency and product quality, reduces the failure rate of the equipment caused by overheating and powder accumulation, and prolongs the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description only illustrate the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the present application.

[0016] Figure 2 It is an internal structure plane structure schematic diagram of the present application.

[0017] Figure 3 It is a part of the heat dissipation assembly plane structure schematic diagram of the present application.

[0018] Figure 4 It is a three-dimensional structure schematic diagram of the present application Figure 3 It is an enlarged structure schematic diagram of A in the present application.

[0019] In the figure, the mark is:

[0020] 1, box; 2, support column; 3, upper cover; 4, feed inlet; 5, protective support; 6, servo motor; 7, fan; 8, dust cover; 9, heat dissipation pipe; 10, fan-shaped air inlet; 11, first belt pulley; 12, belt; 13, second belt pulley; 14, inclined sliding plate; 15, grinding wheel; 16, heat dissipation channel; 17, air storage chamber; 18, grinding disc; 19, fan-shaped air outlet; 20, discharge port; 21, lower cover plate; 22, handle; 23, limiting ring; 24, anti-flow ring; 25, air injection cylinder; 26, air injection channel; 27, limiting block; 28, vertical spring; 29, mounting sleeve; 30, vertical guide rod. Specific implementation

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further illustrate the present application in detail.

[0022] It should be noted that, unless otherwise defined, technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "containing" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] The present application provides a kind of Figures 1 to 4The safe grinding device shown comprises a box body 1, an upper cover 3 is installed at the upper end of the box body 1, a through hole is formed in the middle of the upper cover 3, a heat dissipation pipe 9 is rotatably installed in the through hole, a feeding port 4 is installed at a corner of the upper cover 3, a lower cover plate 21 is installed at the lower end of the box body 1, a discharging port 20 is installed on the lower cover plate 21, a grinding disc 18 is fixedly installed on the outer wall of the heat dissipation pipe 9 in the box body 1, a grinding wheel 15 is slidably installed on the side wall of the heat dissipation pipe 9 in the box body 1 in a perpendicular direction, a slanting slide plate 14 is installed on the inner wall of the box body 1 above the grinding wheel 15, a flow prevention ring 24 is installed at the position where the lower end of the slanting slide plate 14 meets the grinding wheel 15, the inner wall of the flow prevention ring 24 is matched with the top outer wall of the grinding wheel 15, a protection support 5 is installed on the upper cover 3, a dust cover 8 is installed on each face of the protection support 5 except the face close to the upper cover 3, the upper end of the heat dissipation pipe 9 protrudes out of the upper cover 3, a heat dissipation assembly is installed on the heat dissipation pipe 9, the heat dissipation assembly is used for heat dissipation of the grinding wheel 15, a cleaning assembly is installed in the grinding wheel 15, the cleaning assembly is used for cleaning the surface where the grinding wheel 15 meets the grinding disc 18, the heat dissipation assembly adopts the design that the heat dissipation pipe 9 is combined with a fan 7, the fan 7 is driven to rotate by a belt 12 wheel driven by a servo motor 6, forced convection is formed, the heat generated in the grinding process is effectively and quickly led out, and the working temperature of the grinding part is reduced. A plurality of heat dissipation fins are installed on the inner wall of the heat dissipation pipe 9, the heat dissipation area is increased, and the heat dissipation efficiency is improved. A spring-shaped heat dissipation channel 16 is formed in the grinding wheel 15, is communicated with the through hole in the heat dissipation pipe 9, and forms a complete heat dissipation loop, and the heat dissipation effect is further enhanced. The cleaning assembly adopts the design that a jet cylinder 25 is combined with a vertical spring 28, when the grinding wheel 15 stops rotating, the vertical spring 28 pushes the jet cylinder 25 to move downward, a jet channel 26 is aligned with the surface where the grinding wheel 15 meets the grinding disc 18, and automatic cleaning is realized. The jet channel 26 in the jet cylinder 25 is designed in a cross shape, can uniformly spray cleaning gas, and improves the cleaning effect. The design of a limiting ring 23 and a handle 22 facilitates an operator to control the lifting of the grinding wheel 15, the effective combination of the heat dissipation and automatic cleaning functions of the utility model significantly improves the grinding efficiency and product quality, reduces the failure rate of the equipment due to overheating and powder accumulation, and prolongs the service life of the equipment.

[0024] Further, in the present example, as Figure 1 and Figure 3As shown, the top end of the heat dissipation pipe 9 is provided with a fan-shaped air inlet 10, a plurality of first fixing frames are installed on the fan-shaped air inlet 10, a plurality of first fixing frames are installed on the fan-shaped air inlet 10, and a plurality of first fixing frames are installed on the fan-shaped air inlet 10. The fan 7 is jointly installed on the plurality of first fixing frames, and the outer wall of the heat dissipation pipe 9 above the upper cover 3 is provided with a second belt pulley 13, the outer wall of the heat dissipation pipe 9 above the upper cover 3 is provided with a second fixing frame, and the other end of the second fixing frame is provided with a servo motor 6, the output end of the servo motor 6 is provided with a first belt pulley 11, the first belt pulley 11 and the second belt pulley 13 are jointly provided with a belt 12, the inner wall of the heat dissipation pipe 9 is provided with a plurality of heat dissipation fins at the position of the grinding wheel 15, the lower end of the heat dissipation pipe 9 penetrates the lower sealing plate 21 and protrudes from the lower sealing plate 21, the lower sealing plate 21 is provided with a hole with the same diameter as the outer wall of the heat dissipation pipe 9 at the position corresponding to the heat dissipation pipe 9, the lower end of the heat dissipation pipe 9 is provided with a fan-shaped air outlet 19, the grinding wheel 15 is provided with a heat dissipation channel 16, the heat dissipation channel 16 is in a spiral shape in the vertical direction in the grinding wheel 15, and the uppermost end of the heat dissipation channel 16 is provided with an air inlet circular channel in the grinding wheel 15, the other end of the circular channel is connected to the position where the grinding wheel 15 and the heat dissipation pipe 9 are connected, and the inner wall of the heat dissipation pipe 9 is provided with a through hole with the same diameter as the circular channel at the position corresponding to the circular channel. The lower end of the heat dissipation channel 16 is connected with the air storage chamber 17, the air storage chamber 17 is arranged in the inner bottom of the grinding wheel 15, and a one-way air inlet valve is installed at the position where the heat dissipation channel 16 and the air storage chamber 17 are connected. The core part of the heat dissipation assembly is the heat dissipation pipe 9, the inner wall of which is provided with a plurality of heat dissipation fins to increase the heat dissipation area. The heat dissipation pipe 9 penetrates the entire grinding device, the upper end is connected with the fan-shaped air inlet 10, and the lower end is connected with the fan-shaped air outlet 19, forming a complete heat dissipation system. The fan-shaped air inlet 10 is provided with a fan 7, the first belt pulley 11 and the second belt pulley 13 are driven by the servo motor 6 through the belt 12 to rotate, and then the fan 7 is driven to rotate. The rotation of the fan 7 produces forced convection, and the external cold air is sucked into the heat dissipation pipe 9. The grinding wheel 15 is provided with a spring-shaped heat dissipation channel 16, which is communicated with the through hole in the heat dissipation pipe 9. When the cold air flows in the heat dissipation pipe 9, the heat generated during the grinding process is taken away by the heat dissipation fins and the heat dissipation channel 16, and finally discharged from the fan-shaped air outlet 19. Start the servo motor 6, the operator starts the servo motor 6, and the servo motor 6 drives the fan 7 to rotate through the belt 12. The rotation of the fan 7 produces forced convection, and the external cold air is sucked into the heat dissipation pipe 9. The cold air flows in the heat dissipation pipe 9, and the heat generated by the grinding wheel 15 and the grinding disc 18 is taken away by the heat dissipation fins and the heat dissipation channel 16. The air with heat is discharged from the fan-shaped air outlet 19, and the heat dissipation process is completed.

[0025] Further, in the present example, as shown in Figure 2 and Figure 4As shown, the cleaning assembly includes a mounting sleeve 29, one end of the mounting sleeve 29 is mounted in the top end inner wall of the gas storage chamber 17, and the other end of the mounting sleeve 29 is slidably inserted and mounted with a vertical guide rod 30, the other end of the vertical guide rod 30 is mounted with a gas injection cylinder 25, the end of the gas injection cylinder 25 close to the vertical guide rod 30 is mounted with a limit block 27, the gas injection cylinder 25 is provided with a gas injection channel 26, the mounting sleeve 29 is provided with a vertical spring 28, one end of the vertical spring 28 is abutted and mounted on the top inner wall of the gas storage chamber 17, the other end of the vertical spring 28 is abutted and mounted on the top side wall of the limit block 27, the gas injection channel 26 in the top of the gas injection cylinder 25 is cross-shaped, and the gas injection channel 26 in the bottom of the gas injection cylinder 25 is cross-shaped, and the gas injection channel 26 in the top of the gas injection cylinder 25 and the gas injection channel 26 in the bottom of the gas injection cylinder 25 are provided with a connecting circular hole channel in the center, and the bottom of the grinding wheel 15 is provided with a through hole with the same diameter as the gas injection cylinder 25 at the position corresponding to the gas injection cylinder 25, the diameter of the limit block 27 is larger than the diameter of the through hole, the outer wall of the grinding wheel 15 is mounted with a limit ring 23, the lower side wall of the grinding wheel 15 is slidably mounted with a handle 22, and the other end of the handle 22 penetrates and protrudes from the side wall of the box body 1, the box body 1 is provided with a vertical rectangular hole at the position corresponding to the handle 22, and the box body 1 is provided with a support column 2 at each corner of the lower end. The core part of the cleaning assembly is the gas injection cylinder 25, which is provided with a cross-shaped gas injection channel 26. The gas injection cylinder 25 is connected with the mounting sleeve 29 through the vertical guide rod 30, and the mounting sleeve 29 is provided with a vertical spring 28. The lower end of the heat dissipation channel 16 in the grinding wheel 15 is connected with the gas storage chamber 17, and the heat dissipation channel 16 is communicated with the gas storage chamber 17 through a one-way inlet valve. During heat dissipation, part of the cold air passes through the heat dissipation channel 16 and enters the gas storage chamber 17 through the one-way valve, forming a pressure gas. When the grinding wheel 15 stops rotating, the elastic force of the vertical spring 28 pushes the gas injection cylinder 25 to move downward, so that the gas injection channel 26 is aligned with the surface where the grinding wheel 15 and the grinding disc 18 are connected. The gas injection channel 26 in the gas injection cylinder 25 is designed in a cross shape, which can uniformly spray cleaning gas and effectively remove the accumulated powder on the surface of the grinding wheel 15 and the grinding disc 18. The operator stops the servo motor 6, and the heat dissipation pipe 9, the fan 7 and the grinding wheel 15 will stop rotating. The operator can control the upward movement of the grinding wheel 15 through the handle 22 and the limit ring 23. At this time, the lower surface of the grinding wheel 15 will be separated from the upper surface of the grinding disc 18. The elastic force of the vertical spring 28 pushes the gas injection cylinder 25 to move downward. At this time, the lower end of the gas injection channel 26 of the gas injection cylinder 25 protrudes from the lower surface of the grinding wheel 15, so that the gas injection channel 26 is aligned with the surface where the grinding wheel 15 and the grinding disc 18 are connected. The gas injection channel 26 in the gas injection cylinder 25 is designed in a cross shape, which can uniformly spray cleaning gas and effectively remove the accumulated powder on the surface of the grinding wheel 15 and the grinding disc 18. The cleaning gas removes the accumulated powder on the surface of the grinding wheel 15 and the grinding disc 18, and the cleaning process is completed.The operator can control the descent of the grinding wheel 15 by the handle 22 and the limit ring 23 to carry out the next operation.

[0026] It should be understood by those of ordinary skill in the art that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest the scope of the present application (including the claims) is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0027] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. A safety sharpening device characterized by, Include: Box (1), the upper end of the box (1) is provided with an upper cover (3), the middle part of the upper cover (3) is provided with a through hole, the rotating shaft of the heat dissipation pipe (9) is clamped in the hole, one corner of the upper cover (3) is provided with an inlet (4), the lower end of the box (1) is provided with a lower cover plate (21), the lower cover plate (21) is provided with an outlet (20), the outer wall of the heat dissipation pipe (9) in the box (1) is fixedly provided with a grinding disc (18), and the side wall of the heat dissipation pipe (9) in the box (1) is clamped and slidably provided with a grinding wheel (15) in the vertical direction, the inner wall of the box (1) is provided with a slanted slide plate (14) above the grinding wheel (15), the lower end of the slanted slide plate (14) is provided with a flow prevention ring (24) at the position connected with the grinding wheel (15), the inner wall of the flow prevention ring (24) is matched with the outer wall of the top end of the grinding wheel (15), and the upper cover (3) is provided with a protective support (5), each surface of the protective support (5) is provided with a dust cover (8) except the surface close to the upper cover (3), the upper end of the heat dissipation pipe (9) protrudes from the upper cover (3), the heat dissipation pipe (9) is provided with a heat dissipation assembly, and the heat dissipation assembly is used for heat dissipation of the grinding wheel (15); the grinding wheel (15) is provided with a cleaning assembly, and the cleaning assembly is used for cleaning the surface of the grinding wheel (15) and the grinding disc (18).

2. A safety sharpener according to claim 1, wherein The top end of the heat dissipation pipe (9) is provided with a fan-shaped air inlet (10), a plurality of first fixing frames are arranged on the fan-shaped air inlet (10), a fan (7) is arranged on the plurality of first fixing frames, a second pulley (13) is arranged on the outer wall of the heat dissipation pipe (9) above the upper cover (3), a second fixing frame is arranged on the upper cover (3) on one side of the heat dissipation pipe (9), and a servo motor (6) is arranged on the other end of the second fixing frame, a first pulley (11) is arranged on the output end of the servo motor (6), and a belt (12) is arranged on the first pulley (11) and the second pulley (13).

3. A safety sharpener according to claim 2, wherein A plurality of heat dissipation fins are arranged on the inner wall of the heat dissipation pipe (9) at the position of the grinding wheel (15), the lower end of the heat dissipation pipe (9) penetrates the lower cover plate (21) and protrudes from the lower cover plate (21), a hole with the same diameter as the outer wall of the heat dissipation pipe (9) is arranged on the lower cover plate (21) corresponding to the position of the heat dissipation pipe (9), and a fan-shaped air outlet (19) is arranged on the lower end of the heat dissipation pipe (9).

4. A safety sharpener according to claim 3, wherein The grinding wheel (15) is provided with a heat dissipation channel (16) inside, which is in a spiral shape in the vertical direction inside the grinding wheel (15), and the uppermost position of the heat dissipation channel (16) is provided with an air inlet circular channel inside the grinding wheel (15), the other end of the circular channel is connected to the position where the grinding wheel (15) is connected with the heat dissipation pipe (9), and the inner wall of the heat dissipation pipe (9) is provided with a through hole with the same diameter as the circular channel at the position corresponding to the circular channel, and the lower end of the heat dissipation channel (16) is connected with an air storage chamber (17) which is provided inside the bottom end of the grinding wheel (15), and a one-way air inlet valve is installed at the position where the heat dissipation channel (16) is connected with the air storage chamber (17).

5. A safety sharpener according to claim 4, wherein The cleaning assembly includes a mounting sleeve (29) installed at one end of the top inner wall of the air storage chamber (17), and a vertical guide rod (30) is slidingly inserted and installed at the other end of the mounting sleeve (29), the other end of the vertical guide rod (30) is provided with a gas injection cylinder (25), the end of the gas injection cylinder (25) close to the vertical guide rod (30) is provided with a limiting block (27), the gas injection cylinder (25) is provided with a gas injection channel (26) inside, the mounting sleeve (29) is provided with a vertical spring (28) sleeved and installed thereon, one end of the vertical spring (28) is abutted and installed on the top inner wall of the air storage chamber (17), and the other end of the vertical spring (28) is abutted and installed on the top side wall of the limiting block (27).

6. A safety sharpener according to claim 5, wherein The gas injection channel (26) is in a cross shape at the top inside of the gas injection cylinder (25), and the gas injection channel (26) is in a cross shape at the bottom inside of the gas injection cylinder (25), and the gas injection channel (26) at the top inside of the gas injection cylinder (25) and the gas injection channel (26) at the bottom inside of the gas injection cylinder (25) are provided with a connecting hole channel at the center, and the bottom of the grinding wheel (15) is provided with a through hole with the same diameter as the gas injection cylinder (25) at the position corresponding to the gas injection cylinder (25), and the diameter of the limiting block (27) is larger than the diameter of the through hole.

7. A safety sharpener according to claim 6, wherein The outer wall of the grinding wheel (15) is provided with a limiting ring (23), the side wall of the grinding wheel (15) below the limiting ring (23) is slidingly provided with a handle (22), the other end of the handle (22) penetrates and protrudes from the side wall of the box (1), the box (1) is provided with a vertical rectangular hole at the position corresponding to the handle (22), and the lower end of the box (1) is provided with a support column (2) at each corner.

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