NL2032735B1

NL2032735B1 - Crushing device and process for rubber powder

Info

Publication number: NL2032735B1
Application number: NL2032735A
Authority: NL
Inventors: Wang Duoxiao
Original assignee: Mianyang Ruiyang New Material Tech Development Co Ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2023-03-29
Also published as: NL2032735A

Abstract

The invention discloses a rubber powder crushing device which comprises a Hmchine body, wherein the upper part of the machine body is provided, with a rubber rough machining mechanism, the lower part of the rubber rough machining mechanism is connected to a rubber freezing device, the rubber freezing device is connected with a rubber fine machining mechanism, The shell is internally provided with water cooling circulation channels which are uniformly distributed, and the water cooling circulation channels are connected with a water cooling circulation mechanism through a communicating pipe. The rubber roughing mechanism. can cut the rubber into chips with the specification of 50 meshes, and the chips enter‘ the spiral cooling flow passage through. the coarse material entering passage. In the spiral cooling flow channel, the rubber particles are cooled by cold air to about minus 80 degrees Celsius, and the rubber particles are transformed into glass state.

Description

P1516/NLpd

CRUSHING DEVICE AND PROCESS FOR RUBBER POWDER

Technical field

The invention relates to a crushing mechanism, in particular to a rubber powder crushing device and a crushing process.

Background art

Rubber is a kind of high elastic polymer material with re- wversible deformation, which is elastic at room temperature, can produce large deformation under the action of very small external force, and can recover to its original state after removing the external force. Rubber is a completely amorphous polymer with a low glass transition temperature (T g) and often a large molecular weight, greater than hundreds of thousands. Early rubber is latex from rubber trees, rubber grass and other plants, which is pro- cessed into elastic, insulating, impermeable to water and air. It is a highly elastic macromolecular compound. Rubber is divided in- to natural rubber and synthetic rubber. Natural rubber is made by extracting colloid from rubber trees, rubber grass and other plants, while synthetic rubber is made by polymerization of vari- ous monomers. Rubber products are widely used in industry or all aspects of life.

Because the molecular structure of rubber is three- dimensional crosslinking, it can not be recovered by organic sol- vents, heating and other means. Every year, a large number of rub- ber wastes, especially tires, are produced, which cause great dam- age to the environment.

Summary of the invention

The invention aims to provide a rubber powder crushing device and a crushing process aiming at the problems, and realizes the recycling of rubber particles by crushing rubber. Through the treatment and recovery of waste rubber, the environmental pollu- tion and the secondary utilization of rubber materials are greatly reduced.

The invention adopts the following technical scheme:

The invention relates to a rubber powder crushing process,

which comprises the following steps: 1. The machine body of the rubber crusher is provided with a water-cooling circulation mechanism , starting the water cooling circulation mechanism of the pulverizer, and starting the water cooling circulation mechanism to preliminarily cool the body of the pulverizer; 2. Start the shredder Put the rubber block into the hopper; 3. The inside of the rubber crusher is provided with a rubber roughing mechanism The rubber block is cut into rubber particles of 50 meshes in the rubber roughing mechanism; 4. The inside of the rubber crusher is provided with a rubber freezing device The rubber freezing device is started, and the rubber particles with the size of 50 meshes are cooled to 80°C be- low zero by the rubber freezing device; 5. A rubber finishing mechanism is arranged inside the rubber crusher. The rubber particles enter the rubber finishing mecha- nism, and the rubber finishing mechanism grinds the rubber parti- cles to 200 meshes; 6. The rubber particles are discharged through the discharge port .

A rub powder crus device comprises a machine body, wherein a rubber rough machining mechanism is arrange at that upper part of the machine body, a rubber freezing device is connected to the lower part of the rubber rough machining mechanism, the rubber freezing device is connected with a rubber fine machining mecha- nism, The shell is internally provided with water cooling circula- tion channels which are uniformly distributed, and the water cool- ing circulation channels are connected with a water cooling circu- lation mechanism through a communicating pipe.

The rubber roughing mechanism can cut the rubber into chips with the specification of 50 meshes, and the chips enter the spi- ral cooling flow passage through the coarse material entering pas- sage. In the spiral cooling flow channel, the rubber particles are cooled by cold air and frozen to about minus 80 degrees Celsius, and the rubber particles are transformed into glass state. At this time, the rubber particle is no longer soft and elastic, but as hard and brittle as ice cubes, which is convenient for further processing. Then, the rubber particles enter the rubber finishing mechanism, and the rubber particles are crushed into 200 mesh par- ticles. Therefore, the crushing of the rubber is realized, and the secondary use of the rubber is facilitated.

Furthermore, the water-cooling circulating mechanism compris- es a water-cooling box, wherein the water-cooling box is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe of the water-cooling box are commu- nicated with a water-cooling circulating channel in a closed-loop, the water inlet pipe or the water outlet pipe is provided with a circulating pump, and the circulating pump drives liquid in the water-cooled box to circularly operate in the water-cooled circu- lating channel.

Furthermore, the water-cooling circulation mechanism compris- es a refrigerating mechanism, the refrigerating mechanism compris- es a heat exchange pipe, the heat exchange pipe is arranged in the water-cooling box, an output end of the heat exchange pipe is con- nected with a flow limiting valve, the flow limiting valve is con- nected with a compressor through a pipeline, an input end of the compressor is communicated with the heat exchange tube through the flow limiting valve, and an output end of the compressor is con- nected with an radiating pipe The output end of the radiating pipe is connected with a carburetor, and the output end of the carbure- tor is connected with a pressure limiting valve. The pressure lim- iting valve is communicated with the input end of the heat ex- change tube.

By arranging the machine body cooling mechanism, the ambient temperature of rubber processing can be reduced, the heat preser- vation of low-temperature rubber is facilitated, and the using amount of a coolant is reduced At the same time, combustion will not occur in the process of processing to ensure the stable opera- tion of processing; and no odor will be discharged. ? Pollute the environment.

Further, the invention also discloses a preferred structure of a rubber powder crushing device, wherein the rubber freezing device comprises a coarse material inlet channel connected with a discharge port of the rubber rough machining mechanism, the coarse material inlet channel is connected with a spiral cooling flow channel, the spiral cooling flow channel is spirally downwards, and the tail end of the spiral cooling flow passage is connected with a coarse material outlet; The coarse material outlet is con- nected with the feed inlet of the rubber finishing mechanism.

The spiral flow channel is adopted to freeze the rubber par- ticles after primary processing, and the lengthened flow channel can accelerate the particles to enter the vitrification, so that the processing efficiency is improved; and the rubber is frozen after rough processing. It can greatly reduce the freezing time of rubber particles and improve the processing efficiency.

Furthermore, a cold air delivery port is arranged above the coarse material outlet at the bottom of the spiral cooling runner, the cold air delivery port is inserted into the spiral cooling runner, a cold air recovery port is arranged at the coarse materi- al inlet channel, and the cold air recovery port passes through the machine body through a pipeline and is connected with a cold alr circulation mechanism.

By arranging the cold air recycling port, the cold air can be recycled, so that the consumption of the cold air can be reduced, and the economic benefit is improved.

Furthermore, the cold air circulating mechanism comprises a cooling box, wherein a spiral heat exchange pipe is arranged in the cooling box, one end of the spiral heat exchange pipe pene- trates through the top of the cooling box and is connected with a circulating fan through a pipeline, the output end of the circu- lating fan is connected with the spiral heat exchanger pipe through a pipeline, and the input of the circulating fan is con- nected with an air inlet valve which is communicated with a cold air recovery port. The adoption of the circulating fan can accel- erate the flow of cold air, thereby improving the freezing effi- ciency of the rubber particles.

Furthermore, one end of the spiral heat exchange pipe passes through the bottom of the cooling box and is connected with an air outlet valve through a pipeline, and the output end of the air outlet valve is communicated with the cold air delivery port.

Further, the bottom of the cooling box is provided with a re-

frigerant inlet, the cooling box is filled with refrigerant, and the spiral heat exchange tube is provided with a refrigerant inlet at a position higher than the liquid level of the refrigerant. A refrigerant inlet is arranged, and volatile refrigerant gas is di- 5 rectly added into the cold air circulation pipeline, so that the secondary use of the refrigerant is realized, the mixing amount of outside air is reduced, and water vapor in the outside air is pre- vented from being condensed in the cold air circulation pipeline to block the cold gas circulation pipeline.

Furthermore, a hopper is arranged at the top of the machine body, a feed inlet is arranged below the hopper, a rubber roughing mechanism is arranged below the feed inlet, the rubber roughing mechanism comprises a first roller and a second roller which are arranged in parallel, a first motor is arranged on the side sur- face of the machine body, and the first motor is in power connec- tion with the first roller or/and the second roller through a transmission belt.

Further, a rubber finishing mechanism is arranged below the coarse material outlet, the rubber finishing mechanism comprises a third roller and a fourth roller, the third roller and the fourth roller are adjacently arranged in parallel, a second motor is ar- ranged on the machine body, and the second motor is in power con- nection with the third roller or/and the fourth roller through a transmission belt.

Furthermore, discharge ports are arranged below the third roller and the fourth roller, and the refrigerant is liquid nitro- gen The water cooling box is provided with pure water added with antifreeze.

In conclusion, due to the adoption of the technical scheme, the invention has the following beneficial effects: 1. Because rubber has elasticity and greater toughness. The rubber is cut by a roller, so that the rubber is crushed into fine particles, which is convenient for secondary processing; 2. The preliminarily processed rubber particles are subjected to a freezing treatment by using cold air The temperature of the crushed rubber particles is degraded, the rubber particles are put into a vitrification state, and the rubber is hardened, so that the rubber is better crushed; 3. The rubber particles after primary processing are frozen by adopting a spiral flow channel. ? The lengthened circulation channel can accelerate the particles to enter the vitrification, improve the processing efficiency, and freeze the rubber after rough processing. Can greatly reduce the freezing time of the rub- ber particles and improve the processing efficiency; 4. Circulation device for cool air supply The cold air can be recycled, thereby reducing the consumption of the cold air and im- proving the economic benefit; 5. By arrange a cooling device of that machine body The tem- perature of the whole machine body can be reduced, the using amount of a coolant is reduced, and meanwhile, no combustion oc- curs in the processing process, so that the stable operation of the processing is ensured; and no peculiar smell is discharged. ?

Pollute the environment.

Brief description of the drawings

Fig. 1 is a schematic diagram of that present invention;

In the drawing, 1 is a machine body, 2 is a hopper, 3 is a feed inlet, 4 is a first roller, 5 is a second roller, 6 is a first motor, 7 is a transmission belt, 8 is a coarse material in- let channel, 3 is a spiral cooling flow channel, 10 is a cold air recovery port, 11 is an air inlet valve, 12 is a circulating fan, 13 is a spiral heat exchange tube, 14 is a cooling box, and 15 is refrigerant. 16 is a refrigerant inlet, 17 is a refrigerant inlet, 18 is an air outlet valve, 19 is a cold air delivery port, 20 is a coarse material outlet, 21 is a third roller, 22 is a fourth roll- er, 23 is a second motor, 24 is an outlet port, 25 is a housing, 26 is a water-cooled circulation channel, 27 is a water-cooled tank, 28 is a circulating pump, 29 is a heat exchange tube, 30 is a flow-limiting valve, 31 is a pressure limiting valve, 32 is a compressor, 33 is a radiator pipe, and 34 is a carburetor.

Detailed description of the invention

The present invention will now be described in detail with reference to the accompanying drawings.

In order to make the purpose, technical solution and ad- vantages of the present invention more clearly understood, the following is a further detailed description of the present inven- tion with reference to the accompanying drawings and embodiments.

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not in- tended to limit the invention.

Example 1

As shown in Fig. 1, that rub powder crus device comprises a machine body 1, wherein the upper part of the machine body 1 is provided with a rubber rough machine mechanism, the lower part of the rubber rough machining mechanism is connected to a rubber freezing device, the rubber freezing device is connected with a rubber fine machining mechanism, 1 comprises a shell 25, wherein the shell 25 is internally provided with water cooling circulation channels 26 which are uniformly distributed, and the water cooling circulation channels 26 are connected with a water cooling circu- lation mechanism through communicating pipes.

Further, the water-cooling circulation mechanism comprises a water-cooling tank 27, the water-cooling tank 27 is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are in closed-loop communication with the water-cooling circulation channel 26, a circulating pump 28 is provided on the water inlet pipe or the water outlet pipe, and the circulating pump 28 drives the liquid in the water-cooled tank 27 to circulate in the water-cooled circulation channel 26.

Further, the water-cooling circulation mechanism comprises a refrigerating mechanism, the refrigerating mechanism comprises a heat exchange pipe 29, the heat exchange pipe 29 is arranged in the water-cooling box 27, an output end of the heat exchange pipe is connected with a flow-limiting valve 30, the flow-limiting valve 30 is connected with a compressor 32 through a pipeline, and an input end of the compressor 32 is communicated with the heat exchanger pipe 29 through the flow-limiting valve. 32 is connected to a radiating pipe 33, and the output end of the radiating pipe 33 is connected to a vaporizer 34 The output end of the heat ex- change tube 29 is connected with a pressure limiting valve 31, and the pressure limiting valve 31 is communicated with the input end of the heat exchange tube 29.

A hopper 2 is arranged at the top of the machine body 1, a feed port 3 is arranged below the hopper 2, a rubber roughing mechanism is arranged below the feed port 3, the rubber roughing mechanism comprises a first roller 4 and a second roller 5 which are arranged in parallel, a first motor 6 is arranged on the side surface of the machine body 1, and the first motor 6 is in power connection with the first roller 4 or/and the second roller 5 through a transmission belt.

A rubber finishing mechanism is arranged below the coarse ma- terial outlet 20, the rubber finishing mechanism comprises a third roller 21 and a fourth roller 22, the third roller 21 and the fourth roller 22 are adjacently arranged in parallel, a second mo- tor 23 is arranged on the machine body 1, and the second motor 23 is in power connection with the third roller 21 or/and the fourth roller 22 through a transmission belt.

The invention also discloses a preferred embodiment of the rubber powder crushing device, wherein the rubber freezing device comprises a coarse material inlet channel 8 connected with the discharge port of the rubber rough machining mechanism, the coarse material inlet channel 8 is connected with a spiral cooling flow channel 9, the spiral cooling flow channel 9 is downward in a spi- ral manner, the tail end of the spiral cooling passage 9 is con- nected with a coarse material outlet 20, The coarse material out- let 20 is connected to the feed inlet of the rubber finishing mechanism.

A cold air delivery port 19 is arrange above a coarse materi- al outlet 20 at that bottom of the spiral cooling flow channel 9, the cold air delivery port 19 is insert into the spiral cooling flow channel 9, a cold air recovery port 10 is arranged at the coarse material inlet channel 8, and the cold air recovery port 10 passes through the machine body 1 through a pipeline and is con- necte with a cold air circulation mechanism.

By providing the cold air recovery port 10, the cold air can be recovered and utilized, thereby reducing the consumption of cold air and improving the economic benefit.

The cold air circulation mechanism comprises a cooling box 14, wherein a spiral heat exchange pipe 13 is arranged in the cooling box 14, one end of the spiral heat exchange pipe 13 pene- trates through the top of the cooling box 14 and is connected with a circulating fan 12 through a pipeline, the output end of the circulating fan 12 is connected with the spiral heat exchanger pipe 13 through a pipeline, and the input of the circulating fan 12 is connected with an air inlet valve 11; The intake valve 11 communicates with the cold air recovery port 10. By using the cir- culating fan 12, the flow of the cold air can be accelerated, and the freezing efficiency of the rubber particles can be improved.

One end of the spiral heat exchange tube 13 passes through the bottom of the cooling box 14 and is connected with an air out- let valve 18 through a pipeline, and the output end of the air outlet valve 18 is communicated with a cold air delivery port 19.

A refrigerant inlet 16 is arranged at the bottom of the cool- ing box 14, the cooling box 14 is filled with a refrigerant 15, and a refrigerant inlet 17 is arranged on the spiral heat exchange tube 13 at a position higher than the liquid level of the refrig- erant 15. The refrigerant inlet 17 is arranged to directly add the volatile refrigerant gas into the cold air circulation pipeline, thereby realizing the secondary use of the refrigerant, reducing the mixing amount of the outside air, and preventing the water va- por in the outside air from condensing in the cold air circulation pipeline and blocking the cold air circulating pipeline.

A discharge port 24 is arrange below that third roller 21 and the fourth roll 22; the refrigerant 15 is liquid nitrogen; that water-cool box 27 is provided with pure water to which antifreeze is added.

When in use, a rubber block is put into the hopper 2, the cooling box 14 is filled with the refrigerant 15, the equipment is started, and the water cooling circulation mechanism is started. A refrigerant is provided in a circulation path between the heat ex- change tube 29 and the evaporator 34.

In the specific operation process, the compressor 32 is started, the compressor 32 compresses the refrigerant into a liq- uid state, the temperature of the refrigerant rises, and then the liquid refrigerant enters the radiating pipe 33. The radiating pipe 33 lowers the temperature of the refrigerant, and then the refrigerant enters the vaporizer 34 to be vaporized into a gaseous state. At the same time, the temperature of the refrigerant de- creases, the refrigerant enters the heat exchange tubes 29, the heat exchange tubes 29 absorb heat in the water-cooling tank 27, and the liquid in the water-cooling tank 27 decreases. At the same time, the circulation pump 28 is started, and the circulation pump 28 drives the low-temperature liquid to circulate in the water- cooling circulation channel 26, thereby reducing the temperature of the machine body.

Therefore, by arranging the machine body cooling device, the temperature of the whole machine body can be reduced, the using amount of a coolant is reduced, and meanwhile, no combustion oc-

curs in the processing process, so that the stable operation of the processing is ensured; and no peculiar smell is discharged. ?

Pollute the environment.

The first motor 6 rotates, the first motor 6 drives the sec- ond roller 5, and the first roller 4 and the second roller 5 ro- tate relatively under the action of friction. The first roller 4 and the second roller 5 are provided with blades. The first roller 4 and the second roller 5 extrude the rubber block to extrude and cut the rubber into fine particles, and the size of the rubber particles is about 50 meshes.

The rubber particles enter the spiral cooling flow passage 9 from the coarse material inlet passage 8, and slowly slide down- ward along the spiral cooling flow passage 9. At the same time, the circulating fan 12 is turned on, the circulating fan 12 drives the gas to flow, and the gas enters from the cold air recovery port 10, and enters the circulating blower 12 through the air in- let valve 11. The circulating fan 12 pushes the cold air into the spiral heat exchange tube 13. The spiral heat exchange tubes 13 absorb the heat in the cold air and reduce the temperature of the cold air to minus 160 degrees Celsius or less.

The cold air then passes through the outlet valve 18 and is injected into the spiral cooling flow path 9 through the cold air supply port 19. In this way, the cold air with extremely low tem- perature and the rubber particles move in the opposite direction, which can quickly reduce the temperature of the rubber, so that the temperature of the rubber particles is sharply reduced to be- low minus 80 degrees Celsius. At this temperature, the rubber par- ticles are transformed into glass state. At this time, the rubber particles are no longer soft and elastic, but hard and brittle like ice cubes, which is convenient for further processing.

When cooling the cold air, the refrigerant 15 will volati- lize, and the volatilized gas enters the cold air circulation pipeline through the refrigerant inlet 17, and the volatilized re- frigerant gas is directly added into the cold air circulation pipeline, so as to realize the secondary use of the refrigerant, reduce the mixing amount of the outside air, and prevent the water vapor in the outside air from condensing in the cold gas circula-

tion pipeline and blocking the cold gas circulation pipeline.

The frozen rubber particles enter the rubber finishing mecha- nism through the coarse material outlet 20. The second motor 23 rotates, the third roller 21 and the fourth roller 22 are driven by the second motor 23 to rotate relatively, the outer circle of the third roller 21 and the outer circle of the fourth roller 22 are contacted with each other, and the rubber particles are crushed into 200-mesh particles by the relative rotation of the third and fourth rollers 21 and 22. Therefore, the crushing of the rubber is realized, and the secondary use of the rubber is facili- tated.

Due to the elasticity and high toughness of the rubber, the rubber is cut by a roller, so that the rubber is crushed into fine particles, which is convenient for secondary processing; and the preliminarily processed rubber particles are frozen by cold air.

The temperature of the crushed rubber particles is degraded, the rubber particles enter a vitrification state, and the rubber is hardened, so that the rubber is better crushed; and the primarily processed rubber particles are frozen by adopting a spiral flow channel. ? The lengthened circulation channel can accelerate the particles to enter the vitrification, improve the processing effi- ciency, and freeze the rubber after rough processing. Can greatly reduce the freezing time of the rubber particles and improve the processing efficiency; and a cold air supply circulation device is arranged. The cold air can be recycled, thereby reducing the con- sumption of the cold air and improving the economic benefit.

Example 2

On the basis of Embodiment 1, a process for crushing rubber powder is disclosed. Based on the crusher, the process comprises the following steps: 1. Start the water cooling circulation mechanism of the crusher

The water cooling circulation mechanism starts and preliminarily cools the machine body of the pulverizer; 2. Start the shredder Put the rubber block into the hopper 2; 3. The rubber block is cut in a rubber roughing mechanism into mesh rubber particles; 4. Start the rubber refrigeration unit The rubber particles with the size of 50 meshes pass through the spiral cooling flow passage 9, move against the cold air and are continuously cooled; 5. The rubber particles enter the rubber finishing mechanism The rubber finishing mechanism grinds the rubber particles to 200 meshes; 6. Rubber particles pass through the discharge port 24 Dis- charge.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present inven- tion. Any modification, equivalent substitution and improvement within the spirit and principle of the present invention shall be included in the protection scope of the invention.

Claims

CONCLUSIONS

1. Rubber powder grinding process, characterized in that the process includes the following steps: step 1. the machine body of the rubber pulverizer is provided with a water cooling circulation mechanism, starting the water cooling circulation mechanism of the pulverizer, and starting the water cooling circulation mechanism to pre-cool the pulverizer body; step 2. start the shredder - place the rubber block in the hopper; step 3. the inside of the rubber pulverizer is equipped with a rubber roughing mechanism, the rubber block is cut into 50 mesh rubber particles in the rubber roughing mechanism; step 4. the inside of the rubber pulverizer is provided with a rubber freezing device, the rubber freezing device is started, and the 50 mesh size rubber particles are cooled to 80°C below zero by the rubber freezing device; step 5. a rubber finishing mechanism is placed inside the rubber pulverizer, the rubber particles enter the rubber finishing mechanism, and the rubber finishing mechanism grinds the rubber particles to 200 mesh; step 6. the rubber particles are discharged through the discharge port.

2. Rubber powder crushing apparatus, characterized in that it comprises a machine body (1), in which an upper part of the machine body (1) is provided with a rubber roughing mechanism, the lower part of the rubber roughing mechanism is bonded with a rubber freezing device, the rubber freezing device is connected to a rubber finishing mechanism (1) and comprises a casing (25), in which the casing (25) is internally provided with water cooling circulation channels (26) which are evenly distributed and the water cooling circulation channels (26) are connected to a water cooling circulation mechanism by a communicating pipe.

The rubber powder crushing apparatus according to claim 2, wherein the rubber powder crushing apparatus is characterized in that the water cooling circulation mechanism comprises a water cooling box (27), the water cooling box (27) is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe of the water cooling box are communicated with a water cooling circulation channel (26) in a closed loop manner, and the water inlet pipe or the water outlet pipe is provided with a circulation pump (28); The circulation pump (28) drives the liquid in the water cooling tank (27) to circulate in the water cooling circulation channel (26).

The rubber powder crushing apparatus according to claim 3, wherein the rubber powder crushing apparatus is characterized in that : the water cooling circulation mechanism includes a cooling mechanism, the cooling mechanism includes a heat exchange tube (29), the heat exchange tube (29) is arranged in a water cooling tank (27), the output end of the heat exchange tube (29) is connected to a restrictor valve (30), and the restrictor valve (30) is pipelined to a compressor (32); the input end of the compressor (32) communicates with the heat exchange tube (29) through the flow limiting valve (30); the output end of the compressor (32) is connected to a radiation pipe (33), the output end of the radiation pipe (33) is connected to a carburetor (34), and the carburetor The output end of the heat exchange tube (34 ) is connected to a pressure limiting valve (31), and the pressure limiting valve (31) is communicated with the input end of the heat exchange tube (29).

The rubber powder crushing apparatus according to claim 4, wherein the rubber powder crushing apparatus is characterized in that the rubber freezing apparatus comprises a coarse material inlet channel (8) connected to the outlet port of the rubber raw mechanism, the coarse material inlet channel (8) is connected to a spiral cooling flow channel (9), the spiral cooling flow chamber

needle (9) spirals down, and the tail end of the spiral cooling flow channels (9) is connected to a coarse material outlet (20), the coarse material outlet (20) is connected to the feeding inlet of the rubber finishing mechanism; the spiral cooling flow passage (9), a cold air supply port (19), is arranged above the coarse material outlet (20) at the bottom, the cold air supply port (19) is inserted into the spiral cooling flow channel (9), a cold air return recovery port (10) is arranged at the coarse material inlet channel (8), and the cold air recovery port (10) passes through the machine body (1) through a pipeline and is connected to a cold air circulation mechanism.

The rubber powder crushing apparatus according to claim 5, wherein the rubber powder crushing apparatus is characterized in that the cold air circulation mechanism comprises a cooling box (14), a spiral heat exchange tube (13) is arranged in the cooling box (14), one end of the spiral heat exchange tube (13) passes through the highest part of the cooler box and is connected to a circulation fan (12) by a pipeline, the output end of the circulation fan (12) is connected to the spiral heat exchange tube (13) by a pipeline thing, the input end of the circulation fan (12) is connected to an air inlet valve (11), and the air inlet valve (11) is communicated with the cold air recovery port (10).

The rubber powder crushing apparatus according to claim 6, wherein the rubber powder crushing apparatus is characterized in that one end of the spiral heat exchange tube (13) passes through the bottom of the cooler box (14) and is connected to an air outlet valve (18) by a pipeline, and the output end of the air outlet valve (18) is communicated with a cold air supply port (19); A coolant inlet (16) of the cool box is arranged on the bottom of the cool box (14), a coolant (15) is filled into the cool box (14), and a coolant inlet (17) is arranged on the spiral heat exchange tube (13) on a position higher than the coolant liquid level (15).

The rubber powder crushing apparatus according to claim 7, wherein the rubber powder crushing apparatus is characterized in that a hopper (2) is arranged on the top of the machine body (1), a feeding inlet (3) is arranged under the hopper (2), a rubber roughing mechanism is arranged under the feed inlet (3), the side surface of the machine body (1) is provided with a first motor (6), and the first motor (6) is in power connection with the first roller (4) or/and the second roller (5) by means of a transfer belt.

The rubber powder crushing apparatus according to claim 8, wherein the rubber powder crushing apparatus is characterized in that a rubber finishing mechanism is placed under the output of the coarse material (20), the rubber finishing mechanism comprising a third roller (21) and a fourth roller (22) , the third roller (21) and the fourth roller (22) are arranged side by side, a second motor (23) is arranged on the machine body (1), the second motor (23) is in power connection with the third roller (21) or/and the fourth roller (22) by a transmission belt, the third roller (21), a drain hole (24) being placed under said fourth roller (22), (15) is liquid nitrogen; the water cooler (27) 1s supplied with clean water to which antifreeze has been added.