Production equipment of rubber-plastic high-density insulation board containing gas-phase alumina

Abstract

The application provides a production device of rubber-plastic high-density insulation board containing aerogel alumina, and relates to the technical field of insulation board production. The device fundamentally guarantees production safety and equipment durability, realizes intrinsic safety upgrade, and realizes essential safety upgrade.

Description

Technical Field

[0001] This invention relates to the field of insulation board production technology, and more specifically, to a production equipment for high-density rubber and plastic insulation boards containing alumina. Background Technology

[0002] In the production process of high-density rubber and plastic insulation boards containing aerogel alumina, the mixing process is the core link that determines the material properties. This process relies on high-power mixing equipment to strongly compound the rubber and plastic matrix, aerogel powder, and various additives. However, due to the inherent high viscosity of the raw material system, the rubber and plastic matrix (NBR / PVC) will turn into an extremely viscous gel-like substance after softening. The ultrafine aerogel powder is prone to agglomeration in the early stage of mixing, forming local hardening points. These factors together cause the material to generate huge viscous resistance and encapsulation force on the stirring rotor (such as meshing rotor or internal mixer blade) in the mixing chamber. To make matters more complicated, due to the non-uniformity of the initial dispersion of solid fillers and liquid plasticizers, the viscosity distribution of the material in the chamber is not uniform: in areas where fillers are rich or not fully wetted, the resistance will increase sharply; while in areas where it has been initially mixed evenly, the resistance is relatively small. This dynamic non-uniformity of resistance in space and time causes the stirring bearing to be subjected to complex alternating torque loads.

[0003] This drastic fluctuation in resistance directly threatens the stability and safety of the drive system. When the stirring rotor accidentally cuts into a high-viscosity filler agglomerate or encounters an incompletely plasticized raw rubber area, it will generate an impact resistance peak that is far above the average value. This peak torque will act directly on the drive motor through the transmission system, which may cause instantaneous overload of the motor output shaft, triggering overcurrent protection tripping or even winding damage. At the same time, key mechanical components such as gearbox gears and couplings in the transmission system will also experience accelerated fatigue due to periodic or abrupt stress impacts, increasing the risk of mechanical failures such as broken teeth and tooth breakage. This will not only cause unplanned downtime, seriously affecting production efficiency and batch stability, but may also lead to equipment damage or safety accidents due to the sudden failure of key components, posing a serious threat to continuous production processes. Therefore, how to smooth the mixing resistance and protect the drive system has become a core reliability problem that urgently needs to be solved in the design of this equipment. Summary of the Invention

[0004] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a production equipment for high-density rubber and plastic insulation boards containing alumina, so as to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a production equipment for high-density rubber and plastic insulation boards containing alumina, comprising a fixedly arranged internal mixing tank, a constant torque mechanism on the internal mixing tank, the constant torque mechanism comprising an input disk and an output disk arranged coaxially, multiple layers of outer fixing plates and multiple layers of inner fixing plates arranged coaxially within the input disk, rotating plates nested and fitted between the inner fixing plates and the outer fixing plates, multiple pull rods passing through the multiple rotating plates respectively, and a pressure plate sleeved within each pull rod, and a nut threadedly connected to the pull rod, the nut pressing on the pressure plate, and spring pieces provided at both ends of the pressure plate, multiple spring pieces pressing on the rotating plates respectively, and an embedded piece provided at the lower end of the pull rod, the embedded piece fitting on the rotating plate; further comprising a conveying mechanism, the conveying mechanism comprising an output pipe connected to the lower end of the internal mixing tank.

[0006] Preferably, each of the outer fixing pieces has multiple external slots on its outer wall, and the multiple external slots are respectively engaged in the input disk.

[0007] Preferably, each of the multiple inner fixing plates has a three-ring hole, and the shaft of the transmission wheel is sleeved in each of the three-ring holes on the multiple inner fixing plates. The input disk is provided with three three-ring rods, and the transmission wheel is rotatably connected to the three-ring rods.

[0008] Preferably, the input disk is provided with a double-headed rod that rotates coaxially, the upper end of the double-headed rod engaging with three of the transmission wheels, and the disassembly disk is provided with a follower wheel that rotates inward, with the three transmission wheels engaging with the follower wheel.

[0009] Preferably, each of the following wheels has a plurality of centering rods installed at equal intervals on its upper end, and the plurality of centering rods are respectively inserted into the plurality of rotating plates.

[0010] Preferably, the lower end of the double-ended rod is provided with three bottom wheels, the input disk has an output disk that is rotatably embedded in it, and the three bottom wheels are respectively engaged with the input disk.

[0011] Preferably, an external connecting plate is fitted to the upper end of each of the three three-ring rods, and the external connecting plate and the input plate are coaxially arranged. The external connecting plate and the three-ring rod are connected by bolts. A reducer is fixedly installed at the upper end of the mixing barrel. The extended end of the reducer is coaxially connected to the input plate, and a main motor is installed on the reducer.

[0012] Preferably, the lower end of the output disk is coaxially provided with a stirring shaft, and multiple dispersing blades are installed on the outer wall of the stirring shaft.

[0013] Preferably, the conveying mechanism further includes a discharge motor and a reducer mounted on the output pipe. The discharge motor is mounted on the reducer, the reducer is mounted on the output pipe, and an output blade is rotatably disposed inside the output pipe. The output blade is connected to the reducer.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a production equipment for high-density rubber and plastic insulation boards containing alumina, which has the following beneficial effects: This equipment fundamentally ensures production safety and equipment durability, achieving an inherent safety upgrade. In the initial stage of mixing, due to the agglomeration of aerogel powder, incomplete plasticization of the rubber-plastic matrix, and uneven dispersion of various components, the resistance experienced by the stirring bearing fluctuates violently and unpredictably, generating instantaneous torque peaks. In traditional equipment, this impact torque directly acts on the motor and reducer, easily leading to motor overload and burnout or mechanical damage to transmission components. This equipment mitigates this risk by embedding a friction clutch mechanism with a settable torque upper limit in the power transmission path. When the stirring resistance is normal, the mechanism transmits power completely, ensuring efficient mixing. Once a sudden change in resistance causes the required torque to exceed the preset value, the multi-layer friction plates in the mechanism will slip, rigidly limiting the output shaft torque within a safe threshold. This mechanical torque limiting response is extremely rapid and does not rely on electronic sensor detection or circuit feedback, avoiding potential delays or failures in the electronic control system. It provides direct and reliable overload protection for the drive motor and the entire transmission system, reducing the risk of unplanned downtime and component damage due to overload, and improving the operational economy of the equipment throughout its entire life cycle.

[0015] This equipment improves the stability of the mixing process and the uniformity of the final product quality. Traditional mixing processes may suddenly slow down or stop due to motor current protection when faced with resistance fluctuations. This discontinuous processing seriously affects the uniformity of material shearing and mixing, resulting in uneven dispersion of aerogel in the rubber and plastic matrix, forming local agglomerates or weak points. The constant torque mechanism of this equipment plays a role of "buffering" and "stabilizing" by smoothly limiting the maximum output torque. It allows the stirring shaft to "slide" or "overcome" local high resistance areas in a controlled and flexible manner, rather than forcibly resisting or suddenly losing speed. This maintains the relative continuity and stability of the stirring action, ensuring that the material undergoes more uniform and continuous shear force and mixing throughout the mixing process. This allows the nano-sized aerogel powder to be more fully dispersed, and the rubber and plastic matrix to be more tightly bonded to other additives. The direct result is that the produced mixed rubber compound has better homogeneity, laying a solid foundation for subsequent foaming and shaping processes, and ultimately ensuring the stability and high quality of the insulation board's thermal insulation performance.

[0016] The structural design of this equipment reflects high reliability and ease of maintenance. The entire constant torque mechanism consists of mechanical components such as an input disc, an output disc, multiple layers of interlocking fixed and rotating plates, a pressure application assembly, and a gear system. Its overload protection function is achieved entirely through the interaction of mechanical components. Its tolerance to environmental factors (such as temperature and dust) is far higher than that of precision electronic sensors and control systems. Even under harsh working conditions of high load and intermittent impact, it can work stably for a long time, which helps to ensure the long-term stable operation of the equipment and reduces the dependence on professional maintenance personnel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a production equipment for high-density rubber and plastic insulation boards containing alumina according to the present invention. Figure 2 In this invention Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the output disk and input disk in this invention; Figure 4 This is an exploded cross-sectional view of the inner fixing plate, rotating plate, and follower wheel in this invention. Figure 5 This is a schematic diagram of the structure of the outer fixing plate, the inner fixing plate, and the lower pressure plate in this invention; Figure 6 This is an exploded view of the rotating plate and the outer fixed plate in this invention; Figure 7 This is a cross-sectional view of the input disk and output disk in this invention; Figure 8 This is an exploded cross-sectional view of the double-ended rod, input disk, and output disk in this invention. Figure 9 This is a schematic diagram of the structure of the double-headed rod, bottom wheel, and transmission wheel in this invention; Figure 10 This is a schematic diagram of the input disk, inner fixing disk, and three-ring rod in this invention.

[0018] In the diagram: 11. Mixing drum; 21. Input plate; 22. Output plate; 23. Outer fixing plate; 24. Inner fixing plate; 25. Rotating plate; 26. Pull-down rod; 27. Lower pressure plate; 28. Spring plate; 29. ​​Embedded plate; 31. Output pipe; 32. Discharge motor; 33. Output blade; 210. Outer groove; 211. Three-ring hole; 212. Drive wheel; 213. Three-ring rod; 214. Double-headed rod; 215. Follower wheel; 216. Centering rod; 217. Bottom wheel; 218. Outer connecting plate; 219. Reducer; 220. Main motor; 221. Stirring shaft; 222. Dispersing blade. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0022] Please see Figures 1 to 10A production equipment for high-density rubber and plastic insulation boards containing alumina includes a fixed mixing tank 11. A torque-regulating mechanism is installed on the mixing tank 11, comprising an input disc 21 and an output disc 22 coaxially arranged. Multiple layers of outer fixing plates 23 and multiple layers of inner fixing plates 24 are coaxially arranged within the input disc 21. Rotating plates 25 are nested and fitted between the inner fixing plates 24 and the outer fixing plates 23. Multiple pull rods 26 pass through the multiple rotating plates 25, and each pull rod 26 is fitted with a pressure plate 27. A nut is threaded onto each pull rod 26. The lower pressure plate 27 is pressed down, and the two ends of the lower pressure plate 27 are respectively provided with spring pieces 28. Multiple spring pieces 28 are respectively pressed down on the rotating plate 25. The lower end of the pull rod 26 is provided with an embedded piece 29, which fits against the rotating plate 25. Multiple outer grooves 210 are respectively opened on the outer wall of each outer fixing piece 23, and multiple outer grooves 210 are respectively locked in the input disk 21. Multiple inner fixing pieces 24 are respectively provided with three-ring holes 211, and the shafts of the transmission wheels 212 are respectively sleeved in the three-ring holes 211 on the multiple inner fixing pieces 24. The input disk 21 is provided with three three-ring rods 2. 13. The transmission wheel 212 is rotatably connected to the three-ring rod 213. A double-headed rod 214 is coaxially rotatably mounted inside the input disk 21. The upper end of the double-headed rod 214 meshes with three transmission wheels 212. A follower wheel 215 is rotatably sleeved inside the input disk 21, and the three transmission wheels 212 mesh with the follower wheel 215. Multiple centering rods 216 are installed at equal intervals on the upper end of each follower wheel 215, and the multiple centering rods 216 are inserted into multiple rotating plates 25. The lower end of the double-headed rod 214 is meshed with three bottom wheels 217. An output disk is rotatably embedded in the input disk 21. 22, and three bottom wheels 217 are respectively engaged on the input disc 21, the upper ends of the three three-ring rods 213 are fitted with an outer plate 218, and the outer plate 218 and the input disc 21 are coaxially set. The outer plate 218 and the three-ring rods 213 are connected by bolts. The upper end of the mixing barrel 11 is fixedly equipped with a reducer 219, the extended end of the reducer 219 is coaxially connected to the input disc 21, the reducer 219 is equipped with a main motor 220, the lower end of the output disc 22 is coaxially equipped with a stirring shaft 221, and multiple dispersing blades 222 are installed on the outer wall of the stirring shaft 221.

[0023] During the internal mixing of rubber and plastic, various raw materials are first poured into the mixing drum 11, and the entire mixing drum 11 is heated by external equipment. Then, the main motor 220 drives the stirring shaft 221 to rotate, which causes multiple dispersing blades 222 to stir and tumble the raw materials, eventually mixing and mixing the rubber and plastic containing alumina. After mixing, the mixed raw materials are discharged through the output blade 33 for the next step of high-density insulation board production. During the mixing process, different densities will occur in the initial stage, resulting in different resistance levels for the multiple dispersing blades 222. When the resistance changes beyond the upper limit of the main motor 220 or changes too rapidly, it will damage the main motor 220. Therefore, it is necessary to set a maximum torque to prevent damage caused by excessive resistance.

[0024] The preload is determined during installation by adjusting the nuts, thus setting the maximum overload torque during rotation. The torque of the main motor 220 is transmitted to the outer plate 218, and then to the stirring shaft 221 via the output plate 22. The stirring shaft 221 then performs the stirring. At this time, the drive wheel 212, bottom wheel 217, and follower wheel 215 all rotate synchronously without relative rotation. Since the rotating blades 25 are attached to the outer fixed plate 23 and inner fixed plate 24, and multiple rotating blades 25 overlap with the outer fixed plate 23 and inner fixed plate 24, applying appropriate pressure will generate sufficient torque between the multiple rotating blades 25. The pull rod 26 passes through multiple rotating blades 25, and the embedded plate 29 is attached to the lowest rotating blade 25. The upper end of the pull rod 26 passes through the lower pressure plate 27 and then... The nut is threaded onto the pull rod 26, thus exerting downward pressure on the lower pressure plate 27. This pressure is then transmitted to the uppermost rotating plate 25 via the spring plates 28 on both sides of the lower pressure plate 27. Since the outer fixing plates 23 and inner fixing plates 24 of the multiple rotating plates 25 are staggered and attached, and the lower embedded plate 29 also generates corresponding pressure against the lowermost rotating plate 25, the positive pressure generated by the multiple spring plates 28 is pressed onto the multiple overlapping rotating plates 25, outer fixing plates 23, and inner fixing plates 24 respectively. This doubles the friction between the rotating plate 25 and the outer fixing plates 23 and inner fixing plates 24. Therefore, only a small pressure is needed to generate a large frictional torque. By adjusting this frictional torque, the maximum torque that the main motor 220 can transmit can be changed, so that it can always work within a suitable range. When this torque is exceeded, it will only maintain this torque, thus ensuring the safety of the main motor 220.

[0025] Adjusting the nut changes the pressure between the lower pressure plate 27 and the spring plate 28, thereby adjusting the maximum torque. This torque adjustment ensures that the main motor 220 outputs only a fixed torque, preventing damage from exceeding this torque and improving overall safety. Furthermore, the mixing torque can be adjusted according to the mixing process, ensuring optimal mixing results. When the torque is transmitted to the input plate 21 through the outer plate 218, it drives the three-ring rod 213 to rotate synchronously. Because the outer groove 210 on the outer fixing plate 23 is engaged within the input plate 21, the outer fixing plate 23 rotates along with the input plate 21. Each of the three three-ring rods 213 is rotatably connected to a transmission wheel 212, and the inner fixing plate 24... The three three-ring holes 211 are respectively sleeved on the three transmission wheels 212. Therefore, as the three-ring rod 213 rotates, it will also drive the inner fixed plate 24 to rotate synchronously. Since the three-ring rod 213 is mounted on the input disk 21, the outer fixed plate 23 and the inner fixed plate 24 will always rotate with the input disk 21. There is a corresponding friction between the outer fixed plate 23 and the inner fixed plate 24 and the rotating plate 25 that are in contact with each other. The nut will apply pressure to the lower pressure plate 27 and the elastic plate 28. Therefore, the resulting downward pressure will be transmitted to the multi-layered rotating plate 25, the inner fixed plate 24 and the outer fixed plate 23 respectively. Since each layer of rotating plate 25 will generate friction through this downward pressure, finally... The frictional force provided is the sum of the frictional forces provided by the multi-layer rotating plates 25. Multiple centering rods 216 on the follower wheel 215 are inserted into the multiple rotating plates 25 respectively. Therefore, the rotational states of the follower wheel 215 and the multiple rotating plates 25 are synchronized. When there is no rotation between the rotating plates 25 and the outer fixed plate 23 and the inner fixed plate 24, that is, when the torque does not exceed the frictional torque, the power is transmitted to the three three-ring rods 213 through the input disc 21. Since the three bottom wheels 217 are rotatably connected to the three three-ring rods 213, the output shaft of the reducer 219 is fixedly connected to the outer connecting disc 218, and the bottom wheels 217 are respectively meshed with the double-headed rod 214 and the output disc 22. The two ends of the double-headed rod 214 are respectively meshed with the transmission... The driving wheel 212 and the bottom wheel 217 are driven by a three-ring rod 213. The other end of the double-headed rod 214 meshes with multiple driving wheels 212, which mesh with follower wheels 215. The follower wheels 215 are connected to the rotating plate 25 via a centering rod 216. Therefore, if there is no relative rotation between the rotating plate 25 and the inner fixed plate 24 and the outer fixed plate 23, the double-headed rod 214 will not rotate. Thus, the power is transmitted to the output disc 22, and the stirring shaft 221 connected to the output disc 22 stirs the mixture. When the stirring resistance is too high, it is transmitted to the output disc 22, causing the bottom wheel 217 to rotate along the three-ring rod 213, which in turn drives the double-headed rod 214 to rotate.When the double-ended rod 214 rotates, it drives the transmission wheel 212 to rotate, which in turn causes the centering rod 216 to drive the rotating plate 25 and the inner fixed plate 24 to rotate relative to the outer fixed plate 23. Therefore, the follower wheel 215 only transmits a fixed torque, avoiding damage to the main motor 220.

[0026] The conveying mechanism includes an output pipe 31 connected to the lower end of the mixing drum 11. The conveying mechanism also includes a discharge motor 32 and a reducer 219 installed on the output pipe 31. The discharge motor 32 is installed on the reducer 219, and the reducer 219 is installed on the output pipe 31. An output blade 33 is rotatably arranged inside the output pipe 31 and is connected to the reducer 219.

[0027] After the mixing is completed, the output motor 32 drives the output blade 33 to discharge the raw materials, and then the mixed raw materials are transported to the next production stage, thus ensuring the production of the entire rubber and plastic high-density insulation board.

[0028] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production equipment for high-density rubber-plastic insulation boards containing alumina, comprising a fixedly installed mixing tank (11), characterized in that: The mixing drum (11) is provided with a constant torque mechanism, which includes an input disk (21) and an output disk (22) arranged coaxially. Multiple layers of outer fixing plates (23) and multiple layers of inner fixing plates (24) are arranged coaxially inside the input disk (21). Rotating plates (25) are nested and fitted between the inner fixing plates (24) and the outer fixing plates (23). Multiple pull rods (26) pass through the multiple layers of rotating plates (25), and each pull rod (26) is fitted with a pressure plate. (27), and a nut is threaded onto the pull rod (26), the nut presses on the lower pressure plate (27), and spring pieces (28) are provided at both ends of the lower pressure plate (27), and multiple spring pieces (28) press on the rotating plate (25) respectively. An embedded piece (29) is provided at the lower end of the pull rod (26), and the embedded piece (29) is attached to the rotating plate (25); it also includes a conveying mechanism, which includes an output pipe (31) connected to the lower end of the mixing drum (11).

2. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 1, characterized in that: Each of the outer fixing pieces (23) has a plurality of outer slots (210) on its outer wall, and the plurality of outer slots (210) are respectively inserted into the input disk (21).

3. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 2, characterized in that: Each of the multiple inner fixing plates (24) has a three-ring hole (211), and the shaft of the transmission wheel (212) is sleeved in the three-ring hole (211) of the multiple inner fixing plates (24). The input disk (21) is provided with three three-ring rods (213), and the transmission wheel (212) is rotatably connected to the three-ring rods (213).

4. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 3, characterized in that: The input disk (21) is coaxially rotatably provided with a double-headed rod (214), the upper end of which is engaged with three of the transmission wheels (212). The input disk (21) is rotatably sleeved with a follower wheel (215), and the three transmission wheels (212) are engaged with the follower wheel (215).

5. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 4, characterized in that: Each of the following wheels (215) has a plurality of centering rods (216) installed at equal intervals on its upper end, and the plurality of centering rods (216) are inserted into the plurality of rotating plates (25).

6. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 5, characterized in that: The lower end of the double-headed rod (214) is equipped with three bottom wheels (217), and the input disk (21) is rotatably embedded with an output disk (22), and the three bottom wheels (217) are respectively engaged on the input disk (21).

7. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 6, characterized in that: An external plate (218) is attached to the upper end of the three three-ring rods (213), and the external plate (218) and the input plate (21) are coaxially arranged. The external plate (218) and the three-ring rods (213) are connected by bolts. A speed reducer (219) is fixedly arranged at the upper end of the mixing barrel (11). The extended end of the speed reducer (219) is coaxially connected to the input plate (21), and a main motor (220) is arranged on the speed reducer (219).

8. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 7, characterized in that: The lower end of the output disk (22) is coaxially provided with a stirring shaft (221), and multiple dispersing blades (222) are installed on the outer wall of the stirring shaft (221).

9. The production equipment for high-density rubber and plastic insulation boards containing alumina according to claim 8, characterized in that: The conveying mechanism also includes a discharge motor (32) and a reducer (219) installed on the output pipe (31). The discharge motor (32) is installed on the reducer (219), and the reducer (219) is installed on the output pipe (31). An output blade (33) is rotatably arranged inside the output pipe (31), and the output blade (33) is connected to the reducer (219).

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