CN113459321A

CN113459321A - Preparation method and processing device of high-viscosity reclaimed rubber

Info

Publication number: CN113459321A
Application number: CN202110377041.2A
Authority: CN
Inventors: 章红清; 李忠
Original assignee: Zhejiang Shunda Material Technology Co ltd
Current assignee: Zhejiang Shunda Material Technology Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-10-01
Anticipated expiration: 2041-04-08
Also published as: CN113459321B

Abstract

The preparation method of the high-viscosity reclaimed rubber comprises a cutting machine, a desulfurization plasticizing machine, an open mill and a cooling assembly, wherein the desulfurization plasticizing machine is arranged below the cutting machine, the bottom of the cutting machine and the left side of the top of the desulfurization plasticizing machine are communicated and provided with a first discharge pipe, the right end of the desulfurization plasticizing machine is communicated and provided with the open mill, and the cooling assembly is arranged below the open mill. According to the invention, the multiple groups of mixing frames, and the cutting sheets and the pointed cones in the mixing frames are arranged, a cylindrical space three-dimensional structure is formed among the multiple groups of mixing frames, and the molten materials are subjected to cutting type stirring operation through the cutting sheets and the pointed cones under the power driving of the mixing motor, so that the uniformity of the mixed materials can be improved, the dispersity among the materials is improved, the mixing effect is better, and the viscosity of the reclaimed rubber product can be further improved.

Description

Preparation method and processing device of high-viscosity reclaimed rubber

Technical Field

The invention relates to the technical field of reclaimed rubber preparation, in particular to a preparation method and a processing device of high-viscosity reclaimed rubber.

Background

The quantity of waste rubber materials is second to that of waste plastics in waste high polymer materials, wherein the quantity of discarded automobile tires is more than 10 hundred million worldwide, and about 5000-6000 million automobile tires are discarded in China. The utilization of the waste rubber is beneficial to protecting the environment, realizing the reutilization of resources and being beneficial to the sustainable development of social economy. The rubber powder used by the conventional reclaimed rubber is mainly waste tires, and other raw materials comprise waste rubber shoes, inner tubes and the like, a large amount of black softening agent coal tar, petroleum extracts and the like are usually added in the regeneration process, and the prepared reclaimed rubber has very unpleasant smell and great pollution, and also contains a plurality of toxic and carcinogenic chemical substances.

The method has the advantages that the defects of high energy consumption, long preparation period and high cost caused by beating all waste tires into rubber powder in the preparation process of the reclaimed rubber are avoided by replacing rubber powder with partial rubber sheets, the fusion degree of the rubber powder and the surface of the rubber sheet is promoted by improving the performance of the rubber sheet and controlling the activation degree of the surface of the rubber sheet, and the integrity of the prepared reclaimed rubber is improved. It also has the following disadvantages: because the polarity between the rosin and the paraffin is different from that between the waste tire and the waste tire, the dispersibility between the rosin and the paraffin is poor, and the viscosity of the reclaimed rubber is poor; the part of the films in the films are not processed, and only the surfaces of the films are coated with rubber powder, so that toxic and harmful substances are easy to diffuse in the long-time use process, and the problems of poor environmental protection performance of reclaimed rubber and the like are solved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the problems, the preparation method and the processing device of the high-viscosity reclaimed rubber are provided, and the problem that the poor viscosity of the reclaimed rubber caused by poor dispersity between rosin, paraffin and waste tires due to different polarities is solved; the part of the films in the films are not processed, and only the surfaces of the films are coated with rubber powder, so that toxic and harmful substances are easy to diffuse in the long-time use process, and the problems of poor environmental protection performance of reclaimed rubber and the like are solved.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a high-viscosity reclaimed rubber processing device comprises a cutting machine, a desulfurization plasticizing machine, an open mill and a cooling assembly, wherein the desulfurization plasticizing machine is arranged below the cutting machine, the bottom of the cutting machine is communicated with the left side of the top of the desulfurization plasticizing machine and is provided with a first discharge pipe, the right end of the desulfurization plasticizing machine is communicated with the open mill, the cooling assembly is arranged below the open mill, and the bottom of the open mill is communicated with the right side of the top of the cooling assembly through a second discharge pipe;

the cutting machine comprises a vacuum-shaped mixing box, the mixing box comprises a cylindrical straight cylinder part and a bottom part with a right trapezoid cross section, a feeding port is communicated with one side of the mixing box, a disc-shaped mixing rotating plate is arranged above an inner cavity of the mixing box, the upper surface of the mixing rotating plate is fixedly connected with a mixing rotating shaft, the other end of the mixing rotating shaft penetrates through the top wall body of the mixing box and is in power connection with a mixing motor, ten groups of mixing frames are fixedly connected with the lower surface of the mixing rotating plate, eight groups of the mixing frames are arranged along the circumferential edge array of the mixing rotating plate, two groups of the mixing rotating plates are arranged in the middle of the mixing rotating plate, a cylindrical space three-dimensional structure is formed among the groups of the mixing frames, a turnover shaft is arranged between the front wall body and the rear wall body of the mixing box in a rotating manner, and a discharging bottom plate fixedly connected with the turnover shaft is arranged below the mixing frames, the discharging bottom plate can be overturned around the overturning shaft to the bottom of the mixing box, a right-angle closed bottom plate is fixedly arranged at the left end wall of the mixing box, the upper surface of one side end of the discharging bottom plate is abutted against the lower surface of the closed bottom plate, and a top support spring is fixedly connected between the lower surface of the discharging bottom plate and the bottom wall of the mixing box;

The desulfurization plasticizing machine comprises a desulfurization machine barrel arranged below the mixing box and two extrusion screws which are arranged in the desulfurization machine barrel and meshed in the same direction, the extrusion screws comprise feeding sections, extrusion sections arranged at intervals and conveying sections arranged between every two adjacent extrusion sections, and six shear blocks are arranged in the extrusion sections;

the cooling assembly comprises a cooling machine barrel arranged below the desulfurizing machine barrel and a conveying rotating shaft arranged in the cooling machine barrel, wherein the conveying rotating shaft is fixedly provided with a helical blade along the axial direction of the conveying rotating shaft, a cooling water hole with an opening on one side is formed in the conveying rotating shaft, and one end of the opening of the cooling water hole is communicated with a cylindrical cooling water pipe.

Furthermore, each group of mixing racks comprises a cutting blade fixedly connected with the lower surface of the mixing rotating plate and pointed cones fixedly arranged on the cutting blade, and the pointed cones are arranged at left and right intervals along the extending direction of the cutting blade.

Furthermore, the cutting blade is arranged into a sheet shape with a plurality of triangular bends, the pointed cone is arranged in the middle of the cutting blade in the width direction and has a gap with two ends, and the pointed cone is arranged into a triangular shape.

Furthermore, the adjacent two of the eight groups of mixing racks arranged at the circumferential edge of the mixing rotating plate are staggered by 180 degrees, and the two groups of mixing racks arranged at the middle part of the mixing rotating plate are staggered by 180 degrees.

Furthermore, the front and rear end faces of the closed bottom plate and the discharge bottom plate are attached to the end wall of the inner cavity of the mixing box, and the end part of the closed bottom plate is abutted to the end part of the discharge bottom plate to form a closed bottom surface.

Further, the cutouts along the axial equidistance setting of extrusion screw, two adjacent cutouts along extrusion screw's circumferencial direction dislocation 30 set up, the cross-sectional shape of cutouts be regular hexagon.

Further, the conveying rotating shaft is internally provided with a plurality of communicating grooves along the length direction and the circumference direction of the cooling water hole at equal intervals, and the helical blade is arranged as a vacuum piece and is internally provided with a water storage groove communicated with the communicating grooves.

A preparation method of high-viscosity reclaimed rubber comprises the following steps:

step 1: putting rubber slices and preparation materials into a mixing box through a feeding port for heating and melting, driving a mixing rotating plate to rotate by a mixing motor through a mixing rotating shaft so as to drive a plurality of groups of mixing racks with spatial three-dimensional structures to carry out cutting type stirring operation on the melted materials, wherein the rotating speed is 40-60r/min, and thus, mixing rubber is prepared;

Step 2: after all the materials are uniformly mixed, the pin is removed to limit the turnover shaft, so that the turnover shaft can freely rotate, and the discharging bottom plate can turn over around the turnover shaft towards the bottom of the mixing box under the action of the gravity of the materials, so that the materials enter the desulfurization machine barrel through the first discharging pipe, and the discharging speed of the mixed materials is controlled;

and step 3: the mixed rubber enters a desulfurization barrel, desulfurization is carried out by utilizing two extrusion screws meshed in the same direction, the temperature of the extrusion screws is 220-240 ℃, complete desulfurization of the mixed rubber is realized under the extrusion and shearing of shearing blocks arranged in a staggered manner, and simultaneously sulfur substances generated by the mixed rubber volatilize at high temperature;

and 4, step 4: transferring the material discharged from the desulfurization plasticizing machine into an open mill for refining, wherein the voltage frequency of a motor of the open mill is 46-54Hz, and rolling for 10 times at a roller spacing of 0.5mm to prepare reclaimed rubber;

and 5: and the refined reclaimed rubber enters the cooling machine barrel through the discharge pipe II, the conveying rotating shaft drives the helical blade to rotate and convey the reclaimed rubber forwards, the rotating speed is 50-60r/min, the reclaimed rubber is in direct contact with the surface of the helical blade in the conveying process, the reclaimed rubber is rapidly cooled, the temperature after cooling is 10-25 ℃, and the high-viscosity finished reclaimed rubber can be obtained.

Further, the rotating speed of the extrusion screw is gradually increased from 80r/min to 95r/min, and the temperature is controlled at 270-290 ℃; the desulfurization time is controlled to be 50-60min, and the temperature is controlled to be 300-320 ℃.

Furthermore, the temperature of the open mill is controlled at 95-110 ℃, and the regeneration time is 8-10 min.

The invention has the advantages and positive effects that:

1. according to the invention, the multiple groups of mixing frames, and the cutting sheets and the pointed cones in the mixing frames are arranged, a cylindrical space three-dimensional structure is formed among the multiple groups of mixing frames, and the molten materials are subjected to cutting type stirring operation through the cutting sheets and the pointed cones under the power driving of the mixing motor, so that the uniformity of the mixed materials can be improved, the dispersity among the materials is improved, the mixing effect is better, and the viscosity of the reclaimed rubber product can be further improved.

2. According to the invention, the shearing blocks which are arranged along the circumferential direction of the extrusion screw in a staggered manner are arranged, so that complete desulfurization of the rubber compound can be realized under the extrusion and shearing of the shearing blocks, and meanwhile, toxic and harmful substances generated by the rubber compound can volatilize at high temperature, thereby increasing the environmental protection performance of the reclaimed rubber.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic cross-sectional structural view of the present invention;

FIG. 2 is a schematic cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the construction of a mixing frame according to the present invention;

fig. 4 is a schematic view showing the distribution structure of cutouts in the present invention.

The scores in the figures are as follows: 1. a cutter; 3. a desulfurization plasticizing machine; 4. an open mill; 5. a cooling assembly; 6. extruding the screw; 10. a mixing box; 11. mixing and rotating the plate; 12. a mixing rotating shaft; 13. a mixing motor; 14. a feeding port; 15. a closed bottom plate; 16. a turning shaft; 17. a discharge bottom plate; 18. a jacking spring; 19. a first discharge pipe; 20. a devulcanizer barrel; 21. a feeding section; 22. a conveying section; 23. an extrusion section; 25. a second discharge pipe; 26. cooling the cylinder; 27. a conveying rotating shaft; 28. cooling water holes; 29. a communicating groove; 30. a helical blade; 31. a water storage tank; 32. a cooling water pipe; 33. a mixing frame; 34. cutting the sheet; 35. a pointed cone; 36. and (4) cutting the block.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The embodiments of the invention will be described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, 2, 3 and 4, the high-viscosity reclaimed rubber processing device comprises a cutting machine 1, a desulfurization plasticizing machine 3, an open mill 4 and a cooling assembly 5, wherein the desulfurization plasticizing machine 3 is arranged below the cutting machine 1, a first discharge pipe 19 is communicated between the bottom of the cutting machine 1 and the left side of the top of the desulfurization plasticizing machine 3, the open mill 4 is communicated with the right end of the desulfurization plasticizing machine 3, the cooling assembly 5 is arranged below the open mill 4, and the bottom of the open mill 4 is communicated with the right side of the top of the cooling assembly 5 through a second discharge pipe 25;

as shown in fig. 1, 2 and 3, the cutting machine 1 comprises a vacuum-shaped mixing box 10, the mixing box 10 comprises a cylindrical straight cylinder part and a bottom part with a right trapezoid cross section, a feeding port 14 is communicated with one side of the mixing box 10, a disc-shaped mixing rotating plate 11 is arranged above an inner cavity of the mixing box 10, a mixing rotating shaft 12 is fixedly connected to the upper surface of the mixing rotating plate 11, the other end of the mixing rotating shaft 12 penetrates through the top wall of the mixing box 10 and is in power connection with a mixing motor 13, ten sets of mixing frames 33 are fixedly connected to the lower surface of the mixing rotating plate 11, eight sets of mixing frames 33 are arranged along the circumferential edge array of the mixing rotating plate 11, two sets of mixing rotating plate 11 are arranged in the middle part, a cylindrical space three-dimensional structure is formed between the mixing frames 33, a turning shaft 16 is rotatably arranged between the front wall and the rear wall of the mixing box 10, a discharging bottom plate 17 fixedly connected with the turning shaft 16 is arranged below the mixing frame 33, the discharging bottom plate 17 can turn around the turning shaft 16 to the bottom of the mixing box 10, a right-angle-shaped closed bottom plate 15 is fixedly arranged at the left end wall of the mixing box 10, the upper surface of one side end part of the discharging bottom plate 17 is abutted against the lower surface of the closed bottom plate 15, and a jacking spring 18 is fixedly connected between the lower surface of the discharging bottom plate 17 and the bottom wall of the mixing box 10;

As shown in fig. 1 and 4, the desulfurization plasticator 3 includes a desulfurization machine barrel 20 disposed below the mixing box 10 and two extrusion screws 6 disposed in the desulfurization machine barrel 20 and engaged in the same direction, the extrusion screws 6 include a feeding section 21, extrusion sections 23 disposed at intervals, and a conveying section 22 disposed between two adjacent extrusion sections 23, and six shear blocks 36 are disposed in the extrusion sections 23;

as shown in fig. 1, the cooling module 5 includes a cooling cylinder 26 disposed below the desulfurization cylinder 20 and a conveying rotating shaft 27 disposed in the cooling cylinder 26, the conveying rotating shaft 27 is fixedly provided with a helical blade 30 along an axial direction thereof, a cooling water hole 28 with one side opened is disposed in the conveying rotating shaft 27, and one end of the opening of the cooling water hole 28 is communicated with a cylindrical cooling water pipe 32.

In one embodiment, each set of the mixing frames 33 comprises a cutting blade 34 fixedly connected with the lower surface of the mixing rotating plate 11 and a pointed cone 35 fixedly arranged on the cutting blade 34, the molten materials are stirred in a cutting mode through the cutting blade 34 and the pointed cone 35, the uniformity of mixed materials can be improved, and the pointed cones 35 are arranged at left and right intervals along the extending direction of the cutting blade 34, so that all the materials can be mixed sufficiently.

In an embodiment, the cutting blade 34 is configured to be a sheet shape with a plurality of triangular bends, the pointed cone 35 is disposed in the middle of the cutting blade 34 in the width direction and has a gap between the pointed cone 35 and the two ends of the cutting blade, and the pointed cone 35 is configured to be triangular, so that the mixing effect is better, and the viscosity of the reclaimed rubber product can be improved.

In one embodiment, the eight groups of the mixing frames 33 arranged at the circumferential edge of the mixing rotating plate 11 are staggered by 180 degrees, and the two groups of the mixing frames 33 arranged at the middle part of the mixing rotating plate 11 are staggered by 180 degrees, so that the dispersibility of the materials can be improved, and the mixing effect is better.

In an embodiment, the front and rear end faces of the closed bottom plate 15 and the discharge bottom plate 17 are attached to the end walls of the inner cavity of the mixing box 10, so that leakage of molten materials during mixing is prevented, the end part of the closed bottom plate 15 is abutted to the end part of the discharge bottom plate 17 to form a closed bottom surface, discharging of the mixed materials is conveniently controlled, and the effect of desulfurization is prevented from being influenced by too fast feeding in the later period.

In an embodiment, the shear blocks 36 are arranged along the axial direction of the extrusion screw 6 at equal intervals, two adjacent shear blocks 36 are arranged along the circumferential direction of the extrusion screw 6 in a staggered mode by 30 degrees, the cross section of each shear block 36 is in a regular hexagon shape, and the shear blocks (36) arranged in a staggered mode can realize complete desulfurization of rubber compound and increase the environmental protection performance of reclaimed rubber under the extrusion shearing.

In an embodiment, the conveying rotating shaft 27 in along the length direction and the circumference direction equidistance of the cooling water hole 28 be equipped with a plurality of communicating grooves 29, the helical blade 30 set up to vacuum piece and its inside be equipped with the catch basin 31 of communicating groove 29 intercommunication for reclaimed rubber with the surface contact of helical blade 30 in the transportation process can directly cool off, thereby realize the quick cooling to reclaimed rubber, shorten the preparation cycle of reclaimed rubber.

step 1: rubber slices and preparation materials are placed into a mixing box 10 through a feeding port 14 to be heated and melted, a mixing motor 13 drives a mixing rotating plate 11 to rotate through a mixing rotating shaft 12, so that a plurality of groups of mixing racks 33 with spatial three-dimensional structures are driven to perform cutting type stirring operation on the melted materials, and the rotating speed is 40-60r/min, so that rubber compound is prepared;

step 2: after all the materials are uniformly mixed, the pin is withdrawn to limit the turnover shaft 16, so that the turnover shaft can freely rotate, and the discharging bottom plate 17 can turn around the turnover shaft 16 towards the bottom of the mixing box 10 under the action of the gravity of the materials, so that the materials enter the desulfurizing machine barrel 20 through the first discharging pipe 19, and the discharging speed of the mixed materials is controlled;

And step 3: the mixed rubber enters a desulfurization machine barrel 20, desulfurization is carried out by utilizing two extrusion screws 6 meshed in the same direction, the temperature of the extrusion screws 6 is 220-240 ℃, complete desulfurization of the mixed rubber is realized under the extrusion and shearing of shearing blocks 36 arranged in a staggered mode, and sulfur substances generated by the mixed rubber volatilize at high temperature;

and 4, step 4: transferring the material discharged from the desulfurization plasticizing machine 3 into an open mill 4 for refining, wherein the voltage frequency of a motor of the open mill 4 is 46-54Hz, and rolling for 10 times at a roll spacing of 0.5mm to prepare reclaimed rubber;

and 5: and the refined reclaimed rubber enters a cooling machine barrel 26 through a discharge pipe II 25, a conveying rotating shaft 27 drives a helical blade 30 to rotate and convey the reclaimed rubber forwards, the rotating speed is 50-60r/min, the reclaimed rubber is in direct contact with the surface of the helical blade 30 in the conveying process, the reclaimed rubber is rapidly cooled, the temperature after cooling is 10-25 ℃, and the high-viscosity finished reclaimed rubber can be obtained.

In one embodiment, the rotating speed of the extrusion screw 6 is gradually increased from 80r/min to 95r/min, and the temperature is controlled at 270-290 ℃; the desulfurization time is controlled to be 50-60min, and the temperature is controlled to be 300-320 ℃.

In one embodiment, the temperature of the open mill 4 is controlled to be 95-110 ℃, and the regeneration time is 8-10 min.

When the method is specifically implemented, rubber slices and preparation materials are placed into the mixing box 10 through the feeding port 14 to be heated and melted, and the mixing motor 13 drives the mixing rotating plate 11 to rotate through the mixing rotating shaft 12, so that a plurality of groups of mixing frames 33 with a spatial three-dimensional structure are driven to perform cutting type mixing operation on the melted materials, the dispersibility among the materials can be improved, and the mixing effect is better; after all the materials are uniformly mixed, the pin is withdrawn to limit the turnover shaft 16, so that the turnover shaft can freely rotate, the material discharging bottom plate 17 can turn around the turnover shaft 16 towards the bottom of the mixing box 10 under the action of the gravity of the materials, so that the materials enter the desulfurization machine barrel 20 through the first discharging pipe 19, the turnover angle of the material discharging bottom plate 17 can be reduced under the action of the top bracing spring 18, and the speed of the materials entering the desulfurization machine barrel 20 is reduced; the rubber compound enters the desulfurizing machine barrel 20, desulfurization is carried out by utilizing two extrusion screws 6 meshed in the same direction, complete desulfurization of the rubber compound can be realized under the extrusion shearing of the shearing blocks 36 arranged in a staggered manner, and the environmental protection performance of the reclaimed rubber is improved; transferring the material discharged from the desulfurization plasticizing machine 3 into a material discharging device 4 for refining to prepare reclaimed rubber; in the reclaimed rubber after the refining got into cooling barrel 26 through row material pipe two 25, drive helical blade 30 through carrying pivot 27 and rotate the forward conveying reclaimed rubber for can direct cooling during reclaimed rubber and helical blade 30's surface contact in the transportation process, thereby realize the quick cooling to reclaimed rubber, shorten the preparation cycle of reclaimed rubber.

The invention has the advantages and positive effects that:

It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but other embodiments derived from the technical solutions of the present invention by those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides a high viscosity reclaimed rubber processingequipment which characterized in that: the device comprises a cutting machine (1), a desulfurization plasticizing machine (3), an open mill (4) and a cooling assembly (5), wherein the desulfurization plasticizing machine (3) is arranged below the cutting machine (1), the bottom of the cutting machine (1) is communicated with the left side of the top of the desulfurization plasticizing machine (3) to form a first discharging pipe (19), the right end of the desulfurization plasticizing machine (3) is communicated with the open mill (4), the cooling assembly (5) is arranged below the open mill (4), and the bottom of the open mill (4) is communicated with the right side of the top of the cooling assembly (5) through a second discharging pipe (25);

The cutting machine (1) comprises a vacuum-shaped mixing box (10), the mixing box (10) comprises a cylindrical straight cylinder part and a bottom with a right trapezoid cross section, a feeding port (14) is communicated with one side of the mixing box (10), a disc-shaped mixing rotating plate (11) is arranged above an inner cavity of the mixing box (10), the upper surface of the mixing rotating plate (11) is fixedly connected with a mixing rotating shaft (12), the other end of the mixing rotating shaft (12) penetrates through the top wall body of the mixing box (10) and is in power connection with a mixing motor (13), ten groups of mixing frames (33) are fixedly connected to the lower surface of the mixing rotating plate (11), eight groups of mixing frames (33) are arranged along the circumferential edge array of the mixing rotating plate (11) and two groups are arranged in the middle of the mixing rotating plate (11), and cylindrical space structures are formed among the groups of mixing frames (33), a turnover shaft (16) is rotatably arranged between the front wall body and the rear wall body of the mixing box (10), a discharging bottom plate (17) fixedly connected with the turnover shaft (16) is arranged below the mixing frame (33), the discharging bottom plate (17) can turn over towards the bottom of the mixing box (10) around the turnover shaft (16), a right-angle closed bottom plate (15) is fixedly arranged at the left end wall of the mixing box (10), the upper surface of one side end part of the discharging bottom plate (17) is abutted against the lower surface of the closed bottom plate (15), and a jacking spring (18) is fixedly connected between the lower surface of the discharging bottom plate (17) and the bottom wall of the mixing box (10);

The desulfurization plasticizing machine (3) comprises a desulfurization machine barrel (20) arranged below the mixing box (10) and two extrusion screws (6) which are arranged in the desulfurization machine barrel (20) and meshed in the same direction, wherein each extrusion screw (6) comprises a feeding section (21), extrusion sections (23) arranged at intervals and a conveying section (22) arranged between every two adjacent extrusion sections (23), and six shear blocks (36) are arranged in each extrusion section (23);

the cooling assembly (5) comprises a cooling machine barrel (26) arranged below the desulfurization machine barrel (20) and a conveying rotating shaft (27) arranged in the cooling machine barrel (26), wherein the conveying rotating shaft (27) is provided with a spiral blade (30) along the axial direction of the conveying rotating shaft, a cooling water hole (28) with an opening on one side is formed in the conveying rotating shaft (27), and one end of the opening of the cooling water hole (28) is communicated with a cylindrical cooling water pipe (32).

2. The high-viscosity reclaimed rubber processing device according to claim 1, wherein: each group of the mixing frames (33) comprises cutting sheets (34) fixedly connected with the lower surface of the mixing rotating plate (11) and pointed cones (35) fixedly arranged on the cutting sheets (34), wherein the pointed cones (35) are arranged at left and right intervals along the extending direction of the cutting sheets (34).

3. The high-viscosity reclaimed rubber processing device according to claim 1, wherein: the cutting blade (34) is arranged to be in a sheet shape with a plurality of triangular bends, the pointed cone (35) is arranged in the middle of the cutting blade (34) in the width direction and a gap is reserved between the pointed cone and two ends of the cutting blade, and the pointed cone (35) is arranged to be in a triangular shape.

4. The high-viscosity reclaimed rubber processing device according to claim 1, wherein: eight groups of mixing frames (33) arranged at the circumferential edge of the mixing rotating plate (11) are staggered by 180 degrees, and two groups of mixing frames (33) arranged at the middle part of the mixing rotating plate (11) are staggered by 180 degrees.

5. The high-viscosity reclaimed rubber processing device according to claim 1, wherein: the front end face and the rear end face of the closed bottom plate (15) and the front end face and the rear end face of the discharge bottom plate (17) are attached to the end wall of the inner cavity of the mixing box (10), and the end part of the closed bottom plate (15) is abutted to the end part of the discharge bottom plate (17) to form a closed bottom surface.

6. The high-viscosity reclaimed rubber processing device according to claim 1, wherein: shear block (36) follow the axial equidistance setting of extrusion screw (6), two adjacent shear blocks (36) are followed the circumferencial direction dislocation 30 of extrusion screw (6) set up, shear block (36) the cross sectional shape for regular hexagon.

7. The high-viscosity reclaimed rubber processing device according to claim 1, wherein: carry pivot (27) in follow the length direction and the circumferencial direction equidistance of cooling water hole (28) be equipped with a plurality of intercommunication grooves (29), helical blade (30) set up to vacuum piece and its inside be equipped with intercommunication groove (29) the catch basin (31) that communicate.

8. A preparation method of high-viscosity reclaimed rubber comprises the following steps:

step 1: rubber slices and preparation materials are placed into a mixing box (10) through a feeding port (14) to be heated and melted, a mixing motor (13) drives a mixing rotating plate (11) to rotate through a mixing rotating shaft (12), so that a plurality of groups of mixing racks (33) with spatial three-dimensional structures are driven to perform cutting type stirring operation on the melted materials, and the rotating speed is 40-60r/min, so that rubber mixtures are prepared;

step 2: after all the materials are uniformly mixed, the pin is withdrawn to limit the turnover shaft (16) so that the turnover shaft can freely rotate, and the discharging bottom plate (17) can turn over around the turnover shaft (16) towards the bottom of the mixing box (10) under the action of the gravity of the materials, so that the materials enter a desulfurization machine barrel (20) through a first discharging pipe (19), and the discharging speed of the mixed materials is controlled;

And step 3: the rubber compound enters a desulfurization machine barrel (20), desulfurization is carried out by utilizing two extrusion screws (6) meshed in the same direction, the temperature of the extrusion screws (6) is 220-240 ℃, complete desulfurization of the rubber compound is realized under the extrusion and shearing of shearing blocks (36) arranged in a staggered manner, and simultaneously sulfur substances generated by the rubber compound volatilize at high temperature;

and 4, step 4: transferring the material discharged from the desulfurization plasticizing machine (3) into an open mill (4) for refining, wherein the voltage frequency of a motor of the open mill (4) is 46-54Hz, and rolling for 10 times at a roll distance of 0.5mm to prepare reclaimed rubber;

and 5: and the refined reclaimed rubber enters a cooling machine barrel (26) through a discharge pipe II (25), a spiral blade (30) is driven by a conveying rotating shaft (27) to rotate to convey the reclaimed rubber forwards, the rotating speed is 50-60r/min, the reclaimed rubber is in direct contact with the surface of the spiral blade (30) in the conveying process, the reclaimed rubber is rapidly cooled, the temperature after cooling is 10-25 ℃, and the high-viscosity finished reclaimed rubber can be obtained.

9. The method for preparing high-viscosity reclaimed rubber according to claim 8, wherein the method comprises the following steps: the rotating speed of the extrusion screw (6) is gradually increased from 80r/min to 95r/min, and the temperature is controlled at 270-290 ℃; the desulfurization time is controlled to be 50-60min, and the temperature is controlled to be 300-320 ℃.

10. The method for preparing high-viscosity reclaimed rubber according to claim 8, wherein the method comprises the following steps: the temperature of the open mill (4) is controlled at 95-110 ℃, and the regeneration time is 8-10 min.