Thermoplastic insulating material cracking device and use method

Abstract

The invention discloses a thermoplastic insulating material cracking device and a use method, and relates to the technical field of insulating material cracking equipment. The device comprises an auger roller and a resistance heating pipe, a hollow mounting channel is formed in the auger roller, and the mounting channel is used for containing the resistance heating pipe, so that heating and cracking are synchronously conducted when cracking materials are conveyed by the auger roller. Continuous and uniform feeding is achieved through conveying of the auger roller and synchronous heating of the resistance heating pipe in cooperation with the U-shaped groove and the auger rod, the problems of gathering and caking caused by one-time feeding of raw materials in a traditional device are solved, the raw materials are continuously turned over and uniformly heated in the conveying process, the pyrolysis sufficiency is remarkably improved, and the quality of pyrolysis products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of insulating material cracking equipment, and in particular to a thermoplastic insulating material cracking device and a use method thereof. Background Art

[0002] Against the backdrop of the rapid development of modern industry and technology, thermoplastic insulation materials have been widely used in numerous fields, including electrical, electronic, and automotive, due to their excellent insulation properties, good processability, and cost advantages. However, with the surge in the use of these materials and the accelerated pace of product replacement, a large amount of waste thermoplastic insulation materials has been generated. If these waste materials are not handled properly, they will not only cause serious waste of resources but also cause significant pollution to the ecological environment. Therefore, it is of great significance to develop efficient and environmentally friendly thermoplastic insulation material cracking equipment to achieve the resource recycling of waste materials.

[0003] Existing cracking devices often use resistance wire heating, generating heat through the resistance wire, to heat and crack the material within a metal container containing the crushed thermoplastic insulating material. However, in practice, the thermoplastic insulating material to be cracked is typically poured into the metal container all at once for processing. This method of operation can easily lead to large amounts of material aggregation, resulting in uneven heating and agglomeration, which in turn affects the cracking effect. Therefore, the present application proposes a thermoplastic insulating material cracking device to address these issues. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of uneven heating and agglomeration during cracking in existing insulation material cracking devices. The present invention provides a thermoplastic insulation material cracking device and a method of use.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A thermoplastic insulating material cracking device and a method of use thereof include an auger drum and a resistance heating tube. The auger drum is internally structured with a hollow installation channel, which is used to accommodate the resistance heating tube so that the auger drum can heat and crack the cracking material simultaneously when conveying the cracking material.

[0006] Furthermore, hollow roller shafts are respectively provided at both ends of the auger drum, and the mounting channel is located on the axis of the auger drum. One of the hollow roller shafts is fixedly connected to the mounting channel and has spokes connected to the inner wall of the auger drum in a surrounding annular array, and the other hollow roller shaft is connected through an end plate enclosed at the end of the auger drum and is fixedly connected to the interior of the auger drum. The mounting channel does not contact the end plate, and the end plate is fixed to the auger drum.

[0007] Furthermore, it also includes a frame for mounting hollow rollers at both ends of the bearings, and the frame is equipped with an insulation shell wrapped around the auger drum. The insulation shell is columnar and an insulation cavity is constructed between the auger drum, and a plurality of constant temperature heating tubes in an annular array are arranged in the insulation cavity.

[0008] Furthermore, cover plates are fixed at both ends of the insulation shell and the insulation shell is fixed to the bottom rod of the frame through multiple legs. The cover plates are constructed with round holes for the hollow roller shaft to pass through, and the constant temperature heating tubes are fixed to the cover plates at both ends.

[0009] Furthermore, the resistance heating tube is installed on a bracket-type mounting frame so that the resistance heating tube is suspended in the mounting channel, and the end side of the bracket-type mounting frame located outside the mounting channel is fixed to the cover plate through a fixing frame.

[0010] Furthermore, the auger drum is provided with a material guide hopper below one end of the spoke, and the material guide hopper is fixedly mounted on the cover plate.

[0011] Furthermore, a driven gear is concentrically fixed outside the hollow roller shaft located on one side of the end plate, and a power mechanism is also included. The power mechanism includes a mounting bracket fixed on the frame, a dual-axis motor is installed on the mounting bracket, and a driving gear meshing with the driven gear is provided on the external fixed sleeve of one of the output shafts of the dual-axis motor.

[0012] Furthermore, it also includes a feeding system, which includes a hard feeding pipe fixed on the mounting frame, passing through the hollow roller shaft and extending into the interior of the auger drum. A feeding hopper is also fixed on the mounting frame, and the feeding hopper is connected and fixed to the hard feeding pipe.

[0013] Furthermore, the top of the insulation casing is integrally constructed with a U-shaped groove, the top of the U-shaped groove is equipped with a baffle and an auger rod is installed inside, the auger rod is rotatably installed on the end wall of the U-shaped groove, one end of the U-shaped groove extends to the top of the feed hopper and the auger rod rotates through the outer wall of the feed hopper, a driving sprocket is fixed to the outside of the other output shaft of the dual-axis motor, the end of the auger rod extends outward and is fixed with a driven sprocket, and a chain belt is connected for transmission between the driving sprocket and the driven sprocket.

[0014] A method for using a thermoplastic insulating material cracking device, using the thermoplastic insulating material cracking device according to any one of claims 1 to 9, comprising the following steps: S1: Pour the crushed raw materials into the U-shaped trough, and the auger rod rotates to drive the raw materials into the feed hopper, and then pass through the hard feed pipe to reach the inside of the auger drum; S2: The heat provided by the resistance heating tube heats the auger drum, which is driven by power to roll, and the raw materials are cracked inside and transferred to one end; S3: The material guide hopper at the end guides the cracked processed material to the next step.

[0015] The beneficial effects of the present invention are as follows: The present invention realizes continuous and uniform feeding through the conveying of the auger drum and the synchronous heating of the resistance heating tube, in conjunction with the U-shaped groove and the auger rod, thereby avoiding the aggregation and agglomeration problems caused by the one-time input of raw materials in traditional devices, so that the raw materials are continuously turned and heated evenly during the transmission process, significantly improving the sufficiency of cracking and the quality of the cracking products.

[0016] The insulated housing and constant-temperature heating tubes within the chamber create a well-insulated environment, minimizing heat loss. The U-shaped trough utilizes the residual heat from the device to dry the raw materials, reducing subsequent cracking energy consumption. Furthermore, dual-axis motors synchronously drive the feeding and cracking processes, reducing waiting time and improving overall processing efficiency.

[0017] The resistance heating tube of the present invention is suspended and installed in the installation channel of the auger drum through a bracket-type installation frame, thereby solving the problem that the power connection rotates with the drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional half-section view of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the auger drum of the present invention; Figure 4 This invention Figure 3 A three-dimensional half-section view; Figure 5 It is a three-dimensional schematic diagram from another angle of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the present invention after removing the heat-insulating housing; Figure 7 This invention Figure 6 A three-dimensional schematic diagram from another angle; Figure 8 This invention Figure 6 Schematic diagram of some structures in ; Figure 9 is a top view of the present invention; Figure numerals: 1. auger drum; 2. resistance heating tube; 3. mounting channel; 4. hollow roller; 5. spokes; 6. end plate; 7. frame; 8. insulation casing; 9. insulation chamber; 10. constant temperature heating tube; 11. cover plate; 12. support legs; 13. bracket-type mounting frame; 14. fixing frame; 15. material guide hopper; 16. driven gear; 17. power mechanism; 171. mounting frame; 172. dual-axis motor; 173. driving gear; 18. feeding system; 181. hard feeding pipe; 182. feeding hopper; 19. U-shaped groove; 20. shielding plate; 21. auger rod; 22. driving sprocket; 23. driven sprocket; 24. chain belt. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] This embodiment provides a thermoplastic insulating material cracking device and a method of use, which is mainly used to solve the problems of uneven heating and agglomeration during cracking in existing insulating material cracking devices, and provides the following technical solutions. Figures 1-9 Give detailed instructions: Example 1:

[0021] A thermoplastic insulating material cracking device includes an auger drum 1 and a resistance heating tube 2. The auger drum 1 is as follows: Figure 4As shown in , the drum is equipped with auger blades, and the pitch of the auger blades is designed to be 50-80mm, which can be adjusted according to the size of the raw material particles to ensure that the raw materials will neither be retained nor pass through too quickly during the transmission process, thereby improving the uniformity of heating. This is the existing technology and will not be elaborated here. The improvement lies in: the internal structure of the auger drum 1 has a hollow installation channel 3, and the diameter of the installation channel 3 is 20-30mm larger than the outer diameter of the resistance heating tube 2, reserving enough hot air circulation space to avoid local overheating caused by contact between the resistance heating tube 2 and the inner wall of the channel. The installation channel 3 is used to accommodate the resistance heating tube 2, so that the auger drum 1 can heat and crack the cracking material synchronously when conveying the cracking material. The specific implementation method is as follows: Hollow roller shafts 4 are respectively provided at both ends of the auger drum 1, and the installation channel 3 is located on the axis of the auger drum 1, and one of the hollow roller shafts 4 is fixed to the installation channel 3 It is connected and has spokes 5 connected to the inner wall of the auger drum 1 in a circular array around it. The spokes 5 are made of 4-6 stainless steel bars with a diameter of 10-15mm. The spacing of the circular array is equal, which not only ensures the structural strength but also reduces the obstruction to the transmission of raw materials. Another hollow roller 4 is connected through the end plate 6 enclosed at the end of the auger drum 1 and is connected and fixed to the inside of the auger drum 1. The installation channel 3 does not contact the end plate 6. The end plate 6 is fixed to the auger drum 1. It also includes a frame 7 for mounting the hollow rollers 4 at both ends of the bearing. The frame 7 is welded with steel sections, and the bearings are spherical roller bearings that can withstand the radial and axial loads of the auger drum 1. When working, the auger drum 1 rotating on the frame 7 can drive the internal raw materials to move, and heat and crack during the movement. Not only does the raw materials not pile up together, but they can also be broken up during the rolling process so that they are evenly heated.

[0022] like Figure 2As shown, in order to ensure the heating effect and avoid a large temperature difference inside the auger drum 1, a heat-insulating shell 8 wrapped around the outside of the auger drum 1 is installed on the frame 7. The heat-insulating shell 8 is made of aluminum silicate insulation board, and the outer layer is wrapped with stainless steel plate to enhance the structural strength. The heat-insulating shell 8 is columnar and an insulation cavity 9 is constructed between the heat-insulating shell 8 and the auger drum 1, which provides sufficient space for heat circulation. A plurality of annular arrays of constant temperature heating tubes 10 are arranged in the insulation cavity 9. The constant temperature heating tubes 10 use 6-8 electric heating tubes with a power of 1.5-2kW to ensure that the temperature in the insulation cavity 9 is maintained at 300-350°C (adjustable according to the cracking requirements of different thermoplastic materials). The insulation casing 8 is wrapped around the outside of the auger drum 1, and an insulation cavity 9 is formed between the insulation casing 8 and the auger drum 1. The constant temperature heating tube 10 provides auxiliary heating in the insulation cavity 9, reducing the heat exchange between the auger drum 1 and the outside world, playing a role of insulation, and ensuring the stability of the temperature environment required for cracking. At the same time, the two ends of the insulation casing 8 are respectively fixed with cover plates 11, and the insulation casing 8 is fixed to the bottom rod of the frame 7 through multiple legs 12. A circular hole is constructed on the cover plate 11 for the hollow roller shaft 4 to pass through. A high-temperature resistant sealing sleeve is provided between the circular hole and the hollow roller shaft 4 to reduce heat loss from the gap. The constant temperature heating tube 10 is fixed to the cover plates 11 at both ends.

[0023] like Figure 4 and Figure 5As shown, the installation method of the resistance heating tube 2 will be described in detail here. Specifically, the resistance heating tube 2 is installed on a bracket-type mounting frame 13, so that the resistance heating tube 2 is suspended in the installation channel 3. The bracket-type mounting frame 13 is made of high-temperature resistant ceramic material to avoid overheating of the mounting frame due to heat conduction. The bracket-type mounting frame 13 is located on the end side outside the installation channel 3 and is fixed to the cover plate 11 through a fixing frame 14. The resistance heating tube 2 is installed in the installation channel 3 inside the auger drum 1, and the suspended installation is achieved through the bracket-type mounting frame 13. The resistance heating tube 2 uses a stainless steel heating tube with a power of 3-5kW and a length that is compatible with the auger drum 1 (100-150mm shorter than the drum). The surface temperature can be stably controlled at 400-500℃, which meets the cracking temperature requirements of most thermoplastic insulating materials. It is located outside the installation channel 3. The end side is fixed to the cover 11 through a fixing frame 14. When powered on, heat is generated to heat the auger drum 1. When the raw material enters the auger drum 1, it is continuously turned and transmitted under the rotation of the drum and the action of the auger structure, while continuously absorbing the heat of the resistance heating tube 2. After reaching the cracking temperature, a cracking reaction occurs, and the resistance heating tube 2 is suspended. The power wiring does not need to consider the problem of following the rotation. In order to ensure that the cracked raw material can be effectively discharged: the auger drum 1 is provided with a material guide bucket 15 below one end of the spoke 5. The material guide bucket 15 is welded with stainless steel plates and fixedly installed on the cover 11. The cracked material is transferred to the end of the auger drum 1 at the spoke 5, and then falls into the material guide bucket 15 fixedly installed on the cover 11 below. It is discharged by the material guide bucket 15 and enters the next process. Implementation 2:

[0024] The present embodiment improves the following technical solutions on the basis of the embodiment 1: a driven gear 16 is concentrically fixed to the outside of the hollow roller shaft 4 located on one side of the end plate 6; the driven gear 16 and the hollow roller shaft 4 are fixed by a key connection, and further includes a power mechanism 17; the power mechanism 17 includes a mounting bracket 171 fixed to the frame 7; a dual-shaft motor 172 is mounted on the mounting bracket 171; the dual-shaft motor 172 uses a variable frequency motor so that the speed is adjustable, and the residence time of the raw material in the auger drum 1 is controlled by adjusting the speed (usually 30-60 minutes); a driving gear 173 meshing with the driven gear 16 is provided on the outer fixed sleeve of one of the output shafts of the dual-shaft motor 172; the transmission ratio of the driving gear 173 to the driven gear 16 is 1:3-1:5, realizing deceleration and torque increase, ensuring the stable rotation of the auger drum 1; the driving gear 173 is engaged with the driven gear 16, and the power is transmitted to the hollow roller shaft 4 on one side of the auger drum 1, thereby driving the auger drum 1 to rotate.

[0025] And it also includes a feeding system 18, the feeding system 18 includes a hard feeding pipe 181 fixed on the mounting frame 171 and passing through the hollow roller shaft 4 and extending into the interior of the auger drum 1, the hard feeding pipe 181 is made of seamless steel pipe, and a feeding hopper 182 is also fixed on the mounting frame 171, the feeding hopper 182 is connected and fixed with the hard feeding pipe 181, and the feeding function can be realized by simply pouring the raw materials into the feeding hopper 182. At the same time, the core is: the top of the insulation shell 8 is integrally constructed with a U-shaped groove 19, the length of the U-shaped groove 19 is 1.2-1.5m, and the groove depth is 200-250mm. With the help of the residual heat conducted by the insulation shell 8, the temperature in the groove can be maintained at 80-120 ℃, to achieve preliminary dehydration and drying of the raw materials, and reduce energy consumption in the subsequent cracking process. The U-shaped groove 19 is used to hold the raw materials to be cracked. The raw materials can be dried by the residual heat of the device through the U-shaped groove 19. At the same time, a baffle 20 is installed on the top of the U-shaped groove 19 and an auger rod 21 is installed inside. The pitch of the auger rod 21 is 100-150mm, the diameter is 80-100mm, and the gap with the inner wall of the U-shaped groove 19 is 5-10mm to avoid raw material residue. The auger rod 21 is rotatably installed on the end wall of the U-shaped groove 19. One end of the U-shaped groove 19 extends to the top of the feed hopper 182 and the auger rod 21 rotates through the outer wall of the feed hopper 182. The other output shaft of the dual-axis motor 172 is external A driving sprocket 22 is fixed, and the end of the auger rod 21 extends outward and is fixed with a driven sprocket 23. The transmission ratio of the driving sprocket 22 and the driven sprocket 23 is 1:2, ensuring that the rotation speed of the auger rod 21 matches the transmission speed of the auger drum 1 (the feed amount and the transmission amount are balanced). A chain belt 24 is connected between the driving sprocket 22 and the driven sprocket 23. The operator pours the crushed thermoplastic insulation material raw material into the U-shaped groove 19. The U-shaped groove 19 can dry the raw material with the help of the residual heat of the device. An output shaft of the dual-axis motor 172 drives the auger rod 21 to rotate through the driving sprocket 22, the chain belt 24 and the driven sprocket 23. During the rotation of the auger rod 21, the U-shaped groove 19 is The raw materials in the drum are gradually transported to the feed hopper 182, and the raw materials pass through the hard feed pipe 181 connected to the feed hopper 182, and finally enter the inside of the auger drum 1, and the feeding and cracking of the raw materials are synchronized through the dual-axis motor 172, which is a power source. This design adopts the method of synchronous heating of the auger drum 1 and the resistance heating tube 2, and the raw materials are continuously and evenly fed through the U-shaped groove 19 and the auger rod 21. The U-shaped groove 19 can also dry the raw materials with the help of residual heat. At the same time, the feeding and cracking are carried out synchronously through the same power source, which avoids the large-scale aggregation of raw materials and effectively solves the problems of uneven heating and agglomeration in traditional devices, making the material cracking more sufficient and uniform, and improving the quality of the cracking products.

[0026] A method for using a thermoplastic insulating material cracking device, using a thermoplastic insulating material cracking device according to any one of claims 1 to 9, comprising the following steps: S1: Pour the crushed raw materials (the particle size is controlled at 5-20mm to avoid oversized particles affecting heating) into the U-shaped groove 19. The auger rod 21 rotates to drive the raw materials into the feed hopper 182 and pass through the hard feed pipe 181 to reach the interior of the auger drum 1; S2: The heat provided by the resistance heating tube 2 heats the auger drum 1. 30-40 minutes after the resistance heating tube 2 is energized, the interior of the auger drum 1 reaches the preset cracking temperature. The auger drum 1 is driven by the dual-axis motor 172 through the meshing of the driving gear 173 and the driven gear 16 (transmission ratio of 1:3-1:5). The speed is controlled at 15-20 r / min, and the raw material is cracked inside and transmitted to one end. S3: The material guide hopper 15 at the end guides the cracked processed material to the next step (such as condensation recovery, purification, etc.).

[0027] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermoplastic insulating material cracking device, comprising an auger drum (1) and a resistance heating tube (2), characterized in that: The auger drum (1) is internally structured with a hollow installation channel (3), and the installation channel (3) is used to accommodate the resistance heating tube (2), so that the auger drum (1) heats and cracks the cracking material simultaneously when conveying the cracking material.

2. A thermoplastic insulation material cracking device according to claim 1, characterized in that: Hollow rollers (4) are respectively provided at both ends of the auger drum (1), and the mounting channel (3) is located on the axis of the auger drum (1). One of the hollow rollers (4) is fixedly connected to the mounting channel (3) and has spokes (5) connected to the inner wall of the auger drum (1) in a surrounding annular array. The other hollow roller (4) is connected to the interior of the auger drum (1) through an end plate (6) enclosed at the end of the auger drum (1) and is fixedly connected to the interior of the auger drum (1). The mounting channel (3) does not contact the end plate (6), and the end plate (6) is fixed to the auger drum (1).

3. The thermoplastic insulating material cracking device according to claim 2, characterized in that: It also includes a frame (7) for mounting the hollow rollers (4) at both ends of the bearings, and a heat-insulating shell (8) wrapped around the auger drum (1) is installed on the frame (7). The heat-insulating shell (8) is columnar and has a heat-insulating cavity (9) between it and the auger drum (1). A plurality of constant-temperature heating tubes (10) in an annular array are arranged in the heat-insulating cavity (9).

4. A thermoplastic insulating material cracking device according to claim 3, characterized in that: Cover plates (11) are fixed to both ends of the heat-insulating casing (8), and the heat-insulating casing (8) is fixed to the bottom rod of the frame (7) via a plurality of legs (12). A circular hole for the hollow roller (4) to pass through is formed on the cover plate (11), and the constant temperature heating pipe (10) is fixed to the cover plates (11) at both ends.

5. The thermoplastic insulating material cracking device according to claim 1, characterized in that: The resistance heating tube (2) is mounted on a bracket-type mounting frame (13) so that the resistance heating tube (2) is suspended in the mounting channel (3); the end side of the bracket-type mounting frame (13) located outside the mounting channel (3) is fixed to the cover plate (11) via a fixing frame (14).

6. The thermoplastic insulating material cracking device according to claim 3, characterized in that: The auger drum (1) is provided with a material guide hopper (15) below one end of the spoke (5), and the material guide hopper (15) is fixedly mounted on the cover plate (11).

7. The thermoplastic insulating material cracking device according to claim 2, characterized in that: A driven gear (16) is coaxially fixed to the outside of the hollow roller shaft (4) located on one side of the end plate (6), and the hollow roller shaft (4) further includes a power mechanism (17). The power mechanism (17) includes a mounting frame (171) fixed to the frame (7), a dual-axis motor (172) is mounted on the mounting frame (171), and a driving gear (173) meshing with the driven gear (16) is provided on the outer fixed sleeve of one output shaft of the dual-axis motor (172).

8. The thermoplastic insulating material cracking device according to claim 8, characterized in that: The apparatus further comprises a feeding system (18), wherein the feeding system (18) comprises a hard feeding pipe (181) fixed on a mounting frame (171), passing through a hollow roller shaft (4) and extending into the interior of the auger drum (1); a feeding hopper (182) is also fixed on the mounting frame (171), and the feeding hopper (182) is connected and fixed to the hard feeding pipe (181).

9. The thermoplastic insulating material cracking device according to claim 4, characterized in that: The top of the heat-insulating casing (8) is integrally constructed with a U-shaped groove (19), the top of the U-shaped groove (19) is additionally provided with a shielding plate (20) and an auger rod (21) is installed inside, the auger rod (21) is rotatably installed on the end wall of the U-shaped groove (19), one end of the U-shaped groove (19) extends to the top of the feed hopper (182) and the auger rod (21) rotates through the outer wall of the feed hopper (182), a driving sprocket (22) is fixed to the outside of the other output shaft of the dual-axis motor (172), the end of the auger rod (21) extends outward and is fixed with a driven sprocket (23), and a chain belt (24) is connected between the driving sprocket (22) and the driven sprocket (23).

10. A method for using a thermoplastic insulating material cracking device, using the thermoplastic insulating material cracking device according to any one of claims 1 to 9, characterized in that: The steps include: S1: Pour the crushed raw materials into the U-shaped trough (19), and the auger rod (21) rotates to drive the raw materials into the feed hopper (182), and then passes through the hard feed pipe (181) to reach the inside of the auger drum (1); S2: The heat provided by the resistance heating tube (2) heats the auger drum (1), and the auger drum (1) rolls under the power drive, and the raw materials are cracked inside and transferred to one end; S3: The material guide hopper (15) at the end guides out the cracked processed material and enters the next process.

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