Tire crushing material continuous feeding device and driving control method

Abstract

The invention discloses a tire crushing material continuous feeding device and a driving control method, and relates to the technical field of tire cracking production. A discharging pipe is arranged on the annular side of a heat insulation outer pipe. The heat conduction inner pipe is located in the heat insulation outer pipe and fixedly provided with a gear ring towards the side end of the discharging pipe. An annular cavity communicated with the gas cooling circulation assembly is formed between the heat conduction inner pipe and the heat insulation outer pipe. The other end of the conveying screw penetrates through the heat conduction inner pipe and is connected to the flexible coupling, and the screw pitch of the conveying screw is gradually decreased from the cardan shaft end to the flexible coupling. An output shaft of the first motor is connected with the flexible coupling to drive the conveying screw to rotate. The second motor is fixedly installed on the outer side of the heat insulation outer pipe. The gear reducer is fixedly installed on the outer side of the heat insulation outer pipe. Through the design of the variable-pitch conveying screw, under the cooperation of the cardan shaft and the flexible coupling, when local blockage and unbalanced stress occur, the conveying screw can swing, the state is effectively eliminated or buffered, and the operation pressure of the spiral device and a conveying pipeline is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tire pyrolysis production, and particularly to a continuous supply device for tire crushing materials and a driving and control method. Background Art

[0002] In the field of tire recycling and treatment, the crushing of waste tires is a key link. A large number of waste tires will generate a considerable amount of rubber scraps in real time after being crushed. Currently, the industry generally uses a screw conveyor to transport these rubber scraps to relevant pyrolysis equipment.

[0003] However, during the tire crushing process, a large amount of heat is generated, resulting in a relatively high temperature of the crushed rubber particles. After these high-temperature rubber particles enter the screw conveyor, their volume increases due to thermal expansion, causing a significant increase in the extrusion pressure between the rubber particles in the screw conveyor. Especially when the screw conveyor is in a full-load state, the excessive extrusion pressure will impose a great burden on the screw conveyor and the conveying pipeline, not only affecting the normal operation of the equipment, but also accelerating the wear of the equipment, reducing the service life of the equipment, and increasing the maintenance cost and equipment replacement cost of the enterprise.

[0004] In addition, being in a high-load operation state for a long time may also lead to a decrease in the conveying efficiency, unable to meet the needs of large-scale production, and restricting the efficient development of the tire recycling and treatment industry.

[0005] Therefore, how to effectively solve problems such as high temperature, blockage, wear, and low conveying efficiency during the conveying process of rubber scraps has become a difficult problem that needs to be overcome urgently in the industry. Summary of the Invention

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0007] The present invention provides a continuous supply device for tire crushing materials, including the following structures:

[0008] Heat-insulating outer pipe: One end is fixedly connected to the periphery of the outlet of the scrap chamber at the bottom of the crushing equipment, and the other end is provided with a flexible coupling. The side of the heat-insulating outer pipe is provided with a discharge pipe.

[0009] Heat-conducting inner pipe: Located inside the heat-insulating outer pipe, one end is rotatably connected to the outlet of the scrap chamber at the bottom of the crushing equipment, and the other end extends to a position aligned with the discharge pipe.

[0010] A ring cavity communicating with the gas cooling circulation component is formed between the heat-conducting inner pipe and the heat-insulating outer pipe, and a cavity temperature sensor for detecting the gas temperature in the ring cavity is embedded in the heat-insulating outer pipe.

[0011] Feeding screw: Coaxially arranged with the heat-conducting inner pipe, one end is connected to the universal shaft embedded in the side plate of the scrap chamber, and the other end passes through the heat-conducting inner pipe and is connected to the flexible coupling. The pitch of the feeding screw gradually decreases from the universal shaft end to the flexible coupling.

[0012] The first motor: Its output shaft is connected to the flexible coupling and drives the feeding screw to rotate.

[0013] The second motor: It is fixed on the outer side of the heat-insulating outer tube and the output side is rotatably connected to the heat-conducting inner tube.

[0014] As a preferred technical solution of the device of the present invention: A first bearing member is arranged between the heat-conducting inner tube and the outlet of the crushing chamber, and a second bearing member is arranged between the heat-conducting inner tube and the heat-insulating outer tube. Two baffle ring gaskets are also arranged between the heat-conducting inner tube and the heat-insulating outer tube. Among them, the annular cavity for air flow is located between the two baffle ring gaskets, and a plurality of staggered heat dissipation fins are arranged on the outer ring surface of the heat-conducting inner tube. Among them, an end cavity is formed between the first bearing member and an adjacent baffle ring gasket, and the heat-insulating outer tube is provided with a discharge hole communicating with the end cavity, and a collection box is arranged outside the discharge hole.

[0015] As a preferred technical solution of the device of the present invention: Taking the universal shaft as the center, the swinging range of the feeding screw through the flexible coupling is ±5°.

[0016] As a preferred technical solution of the device of the present invention: The other end of the heat-insulating outer tube is provided with an end cover, and the flexible coupling is arranged at the center position of the end cover. An inner retaining ring is fixedly installed on the inner side of the end cover of the heat-insulating outer tube, and a discharge cavity located directly above the discharge pipe is formed between the inner retaining ring and the heat-conducting inner tube.

[0017] As a preferred technical solution of the device of the present invention, the gas cooling circulation component is configured as: An air inlet and an air outlet communicating with the annular cavity are arranged on the outer side of the heat-insulating outer tube, the air outlet is connected to a circulating air pump through a trachea, the circulating air pump is connected to a temperature reduction module through a trachea, and the temperature reduction module is connected to the air inlet through a trachea. Among them, an air inlet temperature sensor is arranged on the inlet side of the temperature reduction module, and an air outlet temperature sensor is arranged on the outlet side. The heat-conducting inner tube is made of copper-aluminum alloy material.

[0018] As a preferred technical solution of the device of the present invention: A toothed ring is fixedly installed on the end of the heat-conducting inner tube facing the discharge pipe side. The gear reducer: It is fixedly installed on the outer side of the heat-insulating outer tube. Among them, the output shaft of the second motor is connected to the input end of the gear reducer, and the output end of the gear reducer is provided with a linkage gear that extends into the interior of the heat-insulating outer tube and meshes with the toothed ring. A gear insertion notch is opened at the connection position between the heat-insulating outer tube and the gear reducer, and the linkage gear passes through the gear insertion notch and extends into the interior of the heat-insulating outer tube.

[0019] As a preferred technical solution of the device of the present invention: The second motor adopts a brushless DC motor whose output shaft can rotate freely under the power-off state.

[0020] The present invention also provides a driving and control method for a continuous feeding device of tire crushing materials, including the following content:

[0021] S1. The control system preset the standard torque T0 and full-load torque T1 when the first motor drives the feeding screw to rotate, where T0 < T1.

[0022] S2. Start the first motor, which drives the feeding screw to rotate. The feeding screw conveys a large amount of rubber scraps in the crushing chamber, and the rubber scraps enter the heat-conducting inner tube.

[0023] S3. After the rubber scraps enter the heat-conducting inner tube, when there is local blockage or uneven stress, the feeding screw with variable pitch design will swing under the cooperation of the universal shaft and the flexible coupling to eliminate or buffer the adverse states of blockage and uneven stress.

[0024] S4. The control system monitors the torque change of the first motor driving the feeding screw in real time.

[0025] S5. When the rotation torque of the feeding screw < T0, control the second motor to enter the torque-locking state: the torque of the second motor is locked, the position of its output shaft is fixed, the heat-conducting inner tube cannot rotate freely. When the first motor drives the feeding screw to rotate, the friction between the rubber particles near the inner wall of the heat-conducting inner tube and the inner wall of the heat-conducting inner tube increases, and the rubber particles advance along the spiral path with the rotation of the feeding screw, improving the output of the feeding screw.

[0026] S6. When T0 ≤ the rotation torque of the feeding screw < T1, enter the zero-torque state: the torque of the second motor is not locked, its output shaft can rotate freely, and the heat-conducting inner tube can also rotate freely. When the first motor drives the feeding screw to rotate, under the action of rubber particle extrusion and friction, the heat-conducting inner tube will rotate slightly, and the rotation direction is the same as the rotation direction of the feeding screw. The friction between the rubber particles near the inner wall of the heat-conducting inner tube and the inner wall of the heat-conducting inner tube decreases, and the advancing speed of the rubber particles near the inner wall of the heat-conducting inner tube slows down, reducing the wear of the rubber particles on the feeding screw and the inner wall of the heat-conducting inner tube.

[0027] S7. When the rotation torque of the feeding screw ≥ T1, enter the synchronous forward rotation state: the second motor drives the heat-conducting inner tube to rotate, and the rotation direction is the same as that of the feeding screw, further reducing the friction between the rubber particles and the inner wall of the heat-conducting inner tube and the output pressure of the feeding screw, and reducing the wear of the overloaded rubber particles on the feeding screw and the inner wall of the heat-conducting inner tube.

[0028] S8. The cavity temperature sensor monitors the temperature of the annular cavity gas in real time. When the temperature exceeds the standard, the annular cavity is cooled by the gas cooling circulation component.

[0029] Compared with the existing technology, the beneficial effects of the present invention are:

[0030] 1. Through the design of a variable pitch feeding screw, in combination with a universal shaft and a flexible coupling, when local blockage or uneven stress occurs, the feeding screw can swing, effectively eliminating or buffering this state and reducing the pressure on the screw conveyor and the conveying pipeline. At the same time, according to the different rotational torques of the feeding screw, the driving and control method adopts three modes: torque locking, zero torque, and synchronous forward rotation, which can specifically reduce the wear of rubber particles on the feeding screw and the inner wall of the heat-conducting inner pipe. For example, in the zero-torque state, the wear degree of the coating on the inner wall of the heat-conducting inner pipe is reduced, and in the synchronous forward rotation state, the wear caused by overloaded rubber particles is further reduced.

[0031] 2. In the present invention, a temperature control system is designed. According to the monitoring results of the annular cavity gas temperature sensor, when the temperature exceeds the standard, the degree of cold air cooling is enhanced to reduce the ambient temperature in the heat-conducting inner pipe, reduce the thermal expansion of rubber particles, reduce the extrusion degree between rubber particles, and thus reduce the forward resistance of the feeding screw, while taking into account the feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the tire crushing material continuous supply device of the present invention.

[0033] Figure 2 is a schematic diagram of the structure of the heat-insulating outer pipe, heat-conducting inner pipe, first motor, second motor and related components in the present invention.

[0034] Figure 3 is Figure 2 a partially enlarged schematic diagram of the structure at A in

[0035] Figure 4 is Figure 2 a partially enlarged schematic diagram of the structure at B in

[0036] Figure 5 is Figure 4 a partially enlarged schematic diagram of the structure at C in

[0037] Wherein: 1 - crushing equipment, 101 - crushing chamber; 2 - heat-insulating outer pipe, 201 - end cover, 202 - inner retaining ring, 203 - discharge hole, 204 - air inlet, 205 - air outlet, 206 - discharge pipe, 207 - discharge chamber, 208 - gear embedding notch; 3 - heat-conducting inner pipe, 301 - heat dissipation fins; 4 - feeding screw; 5 - universal shaft; 6 - flexible coupling; 7 - first motor; 8 - first bearing member; 9 - second bearing member; 10 - material retaining ring; 11 - annular cavity; 12 - end cavity, 13 - collection box; 14 - cavity temperature sensor; 15 - circulating air pump; 16 - inlet air temperature sensor; 17 - cooling module; 18 - outlet air temperature sensor; 19 - second motor; 20 - gear reducer; 21 - toothed ring; 22 - linkage gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] Embodiment 1: The present invention designs a continuous supply device for tire crushing materials, as shown in Figure 1 , Figure 4 , which mainly includes components such as a crushing device 1, a heat-insulating outer pipe 2, a heat-conducting inner pipe 3, a feeding screw 4, a flexible coupling 6, a first motor 7, a second motor 19, and a gas cooling circulation assembly. The specific structural configuration is as follows:

[0040] As shown in Figure 1 , Figure 3 , Figure 4 , the heat-insulating outer pipe 2: One end is fixed around the outlet of the crushing chamber 101 at the bottom of the crushing device 1, playing a role of connection and support; the other end is configured with an end cover 201, and the flexible coupling 6 at the center of the end cover is used to connect the feeding screw 4 to achieve power transmission. The discharge pipe 206 on the annular side is the output channel for the crushing materials. A ring cavity 11 is also formed between the heat-insulating outer pipe 2 and the heat-conducting inner pipe 3, providing a flow space for the cooling gas, reducing the temperature of the heat-conducting inner pipe 3, reducing the thermal expansion of rubber particles and the extrusion force between particles, thereby reducing the forward resistance of the feeding screw 4 and improving the feeding efficiency. In addition, an inner retaining ring 202 inside the end cover 201 and the heat-conducting inner pipe 3 form a discharge chamber 207, facilitating the centralized discharge of the crushing materials. The discharge holes 203 on the heat-insulating outer pipe 2 can discharge the rubber powder entering the end chamber 12, avoiding adverse effects on the equipment. The collection box 13 (made of transparent material) outside the discharge holes 203 can facilitate the observation of the collection situation and timely cleaning.

[0041] As shown in Figure 1 , Figure 3 , Figure 4 , Figure 5 , the heat-conducting inner pipe 3: Located inside the heat-insulating outer pipe 2, one end is rotatably connected to the outlet of the crushing chamber 101, and the other end extends to align with the discharge pipe 206, for transporting the rubber crushing materials. The toothed ring 21 fixed to the side end facing the discharge pipe 206 meshes with the linkage gear 22 at the output end of the gear reducer 20, and rotates under the drive of the second motor 19. The heat-conducting inner pipe 3 is made of copper-aluminum alloy material with good heat-conducting performance, which is beneficial to heat dissipation. The heat dissipation fins 301 on its outer ring surface are fully stirred and contacted with the air flow in the ring cavity 11 when the heat-conducting inner pipe 3 rotates, further improving the heat exchange efficiency and enhancing the cooling effect on the rubber crushing materials.

[0042] As shown in Figure 1 , Figure 2 , Figure 4, the feeding screw 4: It is coaxially arranged with the heat-conducting inner tube 3, one end is connected to the universal shaft 5 embedded in the side plate of the shredding chamber 101, and the other end passes through the heat-conducting inner tube 3 and is connected to the flexible coupling 6. The pitch of the feeding screw 4 gradually decreases from the universal shaft 5 end to the flexible coupling 6. This variable pitch design is of great significance. When the rubber shreds are locally blocked and the force is uneven in the heat-conducting inner tube 3, with the cooperation of the universal shaft 5 and the flexible coupling 6, the feeding screw 4 can swing. The swing range is centered on the universal shaft 5 and can reach ±5° through the flexible coupling 6. This swing can effectively eliminate or buffer the adverse states of blockage and uneven force, reduce the pressure on the screw conveyor and the conveying pipeline, and ensure the smoothness of the conveying process.

[0043] Such as Figure 1 , Figure 2 , Figure 4 , the first motor 7: The output shaft is connected to the flexible coupling 6, provides rotational power for the feeding screw 4, drives the feeding screw 4 to convey the rubber shreds in the shredding chamber 101 to the heat-conducting inner tube 3, and is the main power source for the entire conveying process.

[0044] Such as Figure 1 , Figure 2 , Figure 4 , the second motor 19: It is fixedly installed on the outside of the heat-insulating outer tube 2 and works in cooperation with the gear reducer 20. According to the different rotational torques of the feeding screw, it controls the rotational state of the heat-conducting inner tube 3. A brushless DC motor with a freely rotatable output shaft in the power-off state is used. This kind of motor is convenient to meet the state control requirements under different torque states.

[0045] Such as Figure 2 , Figure 4 , Figure 5 , the gear reducer 20: It is fixedly installed on the outside of the heat-insulating outer tube 2. Its input end is connected to the output shaft of the second motor 19, and the linkage gear 22 at the output end passes through the gear embedding notch 208 on the heat-insulating outer tube 2 and extends into the interior to mesh with the tooth ring 21 of the heat-conducting inner tube 3. The gear reducer 20 can adjust the output torque of the second motor 19 to make it more suitable for the rotational requirements of the heat-conducting inner tube 3, ensuring that the heat-conducting inner tube 3 can rotate stably under different working conditions.

[0046] Such as Figure 1 , Figure 3 , Figure 4, Bearing and material blocking structure: The first bearing member 8 between the heat-conducting inner tube 3 and the outlet of the crushing chamber 101, and the second bearing member 9 between the heat-conducting inner tube 3 and the heat-insulating outer tube 2 play a role in supporting and reducing friction, ensuring the smooth rotation of the heat-conducting inner tube 3. The two material blocking ring grooves 10 between the heat-conducting inner tube 3 and the heat-insulating outer tube 2 adopt a labyrinth structure, effectively blocking rubber particles from entering the annular cavity 11 and preventing rubber particles from interfering with the cooling air flow circulation and the operation of the equipment. An end cavity 12 is formed between the first bearing member 8 and an adjacent material blocking ring groove 10. The discharge hole 203 opened on the heat-insulating outer tube 2 is communicated with the end cavity 12, and the rubber powder entering the end cavity 12 can be discharged to prevent its accumulation from affecting the performance of the equipment.

[0047] Such as Figure 1 , Figure 2 , Figure 3 , Gas cooling circulation component: The air inlet 204 and the air outlet 205 on the outer side of the heat-insulating outer tube 2 are communicated with the annular cavity 11. The air outlet 205 is connected to the circulating air pump 15 through a trachea. The circulating air pump 15 is connected to the temperature reduction module 17, and the temperature reduction module 17 is then connected to the air inlet 204 through a trachea to form a cooling gas circulation loop. The air inlet temperature sensor 16 on the inlet side of the temperature reduction module 17 and the air outlet temperature sensor 18 on the outlet side are used to monitor the gas temperature and provide data support for controlling the operation of the temperature reduction module 17. The cavity temperature sensor 14 monitors the gas temperature in the annular cavity 11 in real time. When the temperature exceeds the standard, the control system adjusts the circulating air pump 15 and the temperature reduction module 17 to enhance the cooling degree of the cold air flow, reduce the ambient temperature in the heat-conducting inner tube 3, reduce the thermal expansion of rubber particles, reduce the extrusion degree between particles, thereby reducing the forward resistance of the feeding screw 4 and improving the feeding efficiency. At the same time, the wear of components such as the heat-conducting inner tube 3 and the feeding screw 4 is reduced.

[0048] Embodiment 2. The present invention also designs a driving and control method for a continuous feeding device of tire crushing materials, and the main working principle is as follows:

[0049] First, preset relevant torque parameters: The control system presets the standard torque T0 and the full-load torque T1 (T0 < T1) when the first motor 7 drives the feeding screw 4 to rotate. These two torque values are important bases for judging the working state of the feeding screw 4 and controlling the second motor 19.

[0050] Second, torque-locked state (feeding screw rotation torque < T0): At this time, there are relatively few rubber particles in the heat-conducting inner tube 3. The torque of the second motor 19 is locked, and the position of the output shaft is fixed, and the heat-conducting inner tube 3 cannot rotate freely. When the first motor 7 drives the feeding screw 4 to rotate, the friction between the rubber particles close to the inner wall of the heat-conducting inner tube 3 and the inner wall of the heat-conducting inner tube 3 increases, and they move forward along the spiral path along with the rotation of the feeding screw 4, improving the output of the feeding screw 4 and ensuring efficient feeding even when the material is less.

[0051] Third, zero torque state (T0 ≤ torque of the feeding screw rotation < T1): It indicates that the rubber particles in the heat-conducting inner tube 3 start to increase. The torque of the second motor 19 is not locked, and the output shaft can rotate freely, and the heat-conducting inner tube 3 can also rotate freely. When the first motor 7 drives the feeding screw 4 to rotate, under the action of the extrusion and friction of the rubber particles, the heat-conducting inner tube 3 undergoes a slight rotation, and the rotation direction is the same as the rotation direction of the feeding screw 4. In this state, the friction between the rubber particles near the inner wall of the heat-conducting inner tube 3 and the inner wall of the heat-conducting inner tube 3 decreases, and the forward speed slows down, reducing the wear of the rubber particles on the feeding screw 4 and the inner wall of the heat-conducting inner tube 3. At the same time, the output pressure of the feeding screw 4 is also reduced, balancing the pressure and wear problems during the conveying process.

[0052] Fourth, synchronous forward rotation state (torque of the feeding screw rotation ≥ T1): It means that there are too many rubber particles in the heat-conducting inner tube 3, which may cause a greater burden on both the feeding screw 4 and the inner wall of the heat-conducting inner tube 3. At this time, the second motor 19 drives the heat-conducting inner tube 3 to rotate, and the rotation direction is the same as that of the feeding screw 4, further reducing the friction between the rubber particles and the inner wall of the heat-conducting inner tube 3, reducing the wear of the overloaded rubber particles on the feeding screw 4 and the inner wall of the heat-conducting inner tube 3. At the same time, the output pressure of the feeding screw 4 is reduced to protect the normal operation of the equipment under high load conditions.

[0053] Finally, overall temperature control: The cavity temperature sensor 14 monitors the gas temperature in the annular cavity 11 in real time. When the temperature exceeds the standard, the annular cavity 11 is cooled by the gas cooling circulation component. The ambient temperature in the heat-conducting inner tube 3 is reduced, the thermal expansion of the rubber particles is reduced, the extrusion degree between the rubber particles is reduced, the forward resistance of the feeding screw 4 is reduced, the feeding efficiency is improved, the wear of the equipment components is reduced, and the stability and efficiency of the entire conveying process are ensured.

[0054] In summary, the continuous feeding device and driving and control method of tire crushing materials of the present invention effectively solve the key problems in the conveying process of tire crushing materials through innovative structural design and intelligent control strategies, and have important significance for promoting the efficient development of the tire recycling and processing industry.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous feeding device for tire crushing materials, characterized in that, Comprising: Heat-insulating outer tube (2): One end is fixedly connected to the periphery of the outlet of the crushing chamber (101) at the bottom of the crushing device (1), and the other end is provided with a flexible coupling (6). The circumferential side of the heat-insulating outer tube (2) is provided with a discharge pipe (206); Heat-conducting inner tube (3): Located inside the heat-insulating outer tube (2), one end is rotatably connected to the outlet of the crushing chamber (101) at the bottom of the crushing device (1), and the other end extends to a position aligned with the discharge pipe (206); A ring cavity (11) communicating with the gas cooling circulation assembly is formed between the heat-conducting inner tube (3) and the heat-insulating outer tube (2). The heat-insulating outer tube (2) is embedded with a cavity temperature sensor (14) for detecting the gas temperature in the ring cavity (11); Feeding screw (4): Coaxially arranged with the heat-conducting inner tube (3), one end is connected to the universal shaft (5) embedded in the side plate of the crushing chamber (101), and the other end passes through the heat-conducting inner tube (3) and is connected to the flexible coupling (6); Wherein, the pitch of the feeding screw (4) gradually becomes smaller from the end of the universal shaft (5) to the flexible coupling (6); First motor (7): Its output shaft is connected to the flexible coupling (6) to drive the feeding screw (4) to rotate; Second motor (19): Fixed on the outer side of the heat-insulating outer tube (2) and the output side is rotatably connected to the heat-conducting inner tube (3).

2. A continuous feeding device for tire crushing materials according to claim 1, characterized in that: A first bearing member (8) is arranged between the heat-conducting inner tube (3) and the outlet of the crushing chamber (101), and a second bearing member (9) is arranged between the heat-conducting inner tube (3) and the heat-insulating outer tube (2); Two material blocking ring rings (10) are also arranged between the heat-conducting inner tube (3) and the heat-insulating outer tube (2); Wherein, the ring cavity (11) for air flow is located between the two material blocking ring rings (10), and a plurality of staggered heat dissipation fins (301) are arranged on the outer circumferential surface of the heat-conducting inner tube (3); Wherein, an end cavity (12) is formed between the first bearing member (8) and an adjacent material blocking ring ring (10). The heat-insulating outer tube (2) is provided with a discharge hole (203) communicating with the end cavity (12), and a collection box (13) is arranged outside the discharge hole (203).

3. A continuous feeding device for tire crushing materials according to claim 1, characterized in that: Taking the universal shaft (5) as the center, the swinging range of the feeding screw (4) through the flexible coupling (6) is ±5°; 4. A continuous feeding device for tire crushing materials according to claim 1, characterized in that: The other end of the heat-insulating outer tube (2) is provided with an end cover (201), and the flexible coupling (6) is arranged at the center position of the end cover (201); An inner retaining ring (202) is fixedly installed on the inner side of the end cover (201) of the heat-insulating outer tube (2), and a discharge cavity (207) located directly above the discharge pipe (206) is formed between the inner retaining ring (202) and the heat-conducting inner tube (3).

5. A continuous supply device for tire crushing materials according to claim 1, characterized in that, The gas cooling circulation assembly is configured as: An air inlet (204) and an air outlet (205) communicating with the annular cavity (11) are arranged on the outer side of the heat-insulating outer pipe (2). The air outlet (205) is connected to a circulating air pump (15) through an air pipe. The circulating air pump (15) is connected to a cooling module (17) through an air pipe. The cooling module (17) is connected to the air inlet (204) through an air pipe; Among them, an air inlet temperature sensor (16) is arranged on the inlet side of the cooling module (17), and an air outlet temperature sensor (18) is arranged on the outlet side; Among them, the heat-conducting inner pipe (3) is made of a copper-aluminum alloy material.

6. A continuous supply device for tire crushing materials according to claim 1, characterized in that: A toothed ring (21) is fixedly installed at the side end of the heat-conducting inner pipe (3) facing the discharge pipe (206); Gear reducer (20): fixedly installed on the outer side of the heat-insulating outer pipe (2); Among them, the output shaft of the second motor (19) is connected to the input end of the gear reducer (20), and a linkage gear (22) configured to extend into the heat-insulating outer pipe (2) and mesh with the toothed ring (21) is arranged at the output end of the gear reducer (20); A gear embedding notch (208) is opened at the connection position of the heat-insulating outer pipe (2) and the gear reducer (20), and the linkage gear (22) movably passes through the gear embedding notch (208) and extends into the heat-insulating outer pipe (2).

7. A continuous supply device for tire crushing materials according to claim 1, characterized in that: The second motor (19) is a brushless DC motor whose output shaft can rotate freely in the power-off state.

8. A drive control method for the tire crushing material continuous supply device according to any one of claims 1 to 7, characterized in that, It includes the following contents: S1. The control system presets the standard torque T0 and the full-load torque T1 when the first motor (7) drives the feeding screw (4) to rotate, where T0 < T1; S2. Start the first motor (7), which drives the feeding screw (4) to rotate. The feeding screw (4) conveys a large amount of rubber crushing materials in the crushing chamber (101), and the rubber crushing materials enter the heat-conducting inner pipe (3); S3. After the rubber crushing materials enter the heat-conducting inner pipe (3), when local blockage or uneven force occurs, the feeding screw (4) with a variable pitch design swings under the cooperation of the universal joint (5) and the flexible coupling (6) to eliminate or buffer the adverse states of blockage and uneven force; S4. The control system monitors the torque change situation in real time when the first motor (7) drives the feeding screw (4) to rotate; S5. When the rotation torque of the feeding screw (4) < T0, control the second motor (19) to enter the torque locking state: the torque of the second motor (19) is locked, the position of its output shaft is fixed, the heat-conducting inner pipe (3) cannot rotate freely, and when the first motor (7) drives the feeding screw (4) to rotate, the friction force between the rubber particles close to the inner wall of the heat-conducting inner pipe (3) and the inner wall of the heat-conducting inner pipe (3) increases, and they advance along the spiral path with the rotation of the feeding screw (4), improving the output of the feeding screw (4); S6. When T0 ≤ the rotational torque of the feeding screw (4) < T1, it enters the zero-torque state: the torque of the second motor (19) is not locked, its output shaft can rotate freely, and the heat-conducting inner tube (3) can also rotate freely. When the first motor (7) drives the feeding screw (4) to rotate, due to the extrusion and frictional force of the rubber particles, the heat-conducting inner tube (3) will undergo a slight rotation, and the rotation direction is the same as the rotation direction of the feeding screw (4). The frictional force between the rubber particles near the inner wall of the heat-conducting inner tube (3) and the inner wall of the heat-conducting inner tube (3) decreases, and the forward speed of the rubber particles near the inner wall of the heat-conducting inner tube (3) slows down, reducing the wear degree of the rubber particles on the inner walls of the feeding screw (4) and the heat-conducting inner tube (3). S7. When the rotational torque of the feeding screw (4) ≥ T1, it enters the synchronous forward rotation state: the second motor (19) drives the heat-conducting inner tube (3) to rotate, and the rotation direction is the same as that of the feeding screw (4), further reducing the frictional force between the rubber particles and the inner wall of the heat-conducting inner tube (3) and the output pressure of the feeding screw (4), and reducing the wear degree of the overloaded rubber particles on the inner walls of the feeding screw (4) and the heat-conducting inner tube (3). S8. The cavity temperature sensor (14) monitors the gas temperature in the annular cavity (11) in real time. When the temperature exceeds the standard, the annular cavity (11) is cooled by the gas cooling circulation component.

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