Rubber powder and asphalt stirring mechanism

Abstract

The invention relates to the technical field of rubber powder asphalt production equipment, in particular to a rubber powder asphalt stirring mechanism which comprises a tank body and a rotating shaft rotationally arranged in the tank body, a plurality of anchor type upper wall scraping paddles are arranged on the upper layer of the tank body, and a plurality of anchor type lower wall scraping paddles are arranged on the lower layer of the tank body. The tank body is internally provided with two gap-adjustable stirring components which are respectively used for controlling the adjustment of the anchor type upper wall scraping paddle or the anchor type lower wall scraping paddle, and the rubber powder asphalt stirring mechanism divides the wall scraping function through the anchor type upper wall scraping paddle and the anchor type lower wall scraping paddle, so that the problem of high resistance caused by the fact that a single scraping plate needs to cover the whole tank wall is solved, and the stirring efficiency is improved. The operation load of the stirring shaft is reduced, so that the axial material conveying capacity and the overall mixing efficiency are enhanced, and the gap between the wall scraping paddle and the tank wall is dynamically adjusted according to the sedimentation position and viscosity distribution of the rubber powder; the rotating shaft is directly used as a heat conduction carrier, heat is efficiently transferred to all areas in the tank body, temperature loss caused by heat absorption of rubber powder is compensated, and rapid reduction of local temperature is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of rubber powder asphalt production equipment, in particular to a rubber powder asphalt stirring mechanism. Background Art

[0002] As an environmentally friendly pavement material, the mixing efficiency of rubber powder modified asphalt during its production process directly affects product quality and energy consumption. Currently, mechanical stirring is commonly used in the industry to mix rubber powder and matrix asphalt. However, in actual production, due to the high heat absorption characteristics of rubber powder and the non-Newtonian fluid characteristics of the asphalt system, the mixing process faces many technical bottlenecks.

[0003] In the prior art, a production device such as that shown in patent CN221753033U adopts an anchor-type spiral composite paddle structure to attempt to solve the mixing problem. The device controls the step-by-step feeding by a turntable, which reduces the initial agglomeration of rubber powder to a certain extent. However, this design still has significant defects in practical applications: when rubber powder is added, its rapid heat absorption characteristics cause the viscosity of the asphalt system to increase sharply, that is, thickening. At the same time, the scraper needs to scrape the entire tank wall when rotating, which greatly increases the operating resistance of the composite stirring paddle. Specifically, the speed of the stirring shaft is forced to decrease, which in turn causes the dual problems of reduced axial material conveying capacity and insufficient local shear force.

[0004] More seriously, the flow stagnation caused by the reduced speed creates a vicious cycle. At the bottom of the tank, the settled rubber crumbs, lacking sufficient shear, form high-viscosity agglomerates. These agglomerates continuously absorb heat from the surrounding asphalt, causing a rapid drop in local temperature. Field data shows that without effective thermal compensation, the tank bottom temperature can drop by 10-15°C in just three minutes. This temperature drop further increases the viscosity of the asphalt, causing the rheological properties of the mixed system to deteriorate. Therefore, we proposed a crumb rubber asphalt mixing mechanism. Summary of the Invention

[0005] A technical problem to be solved by this application is: how to design a rubber powder asphalt mixing mechanism that can adjust the distance between the scraper and the tank wall according to the reaction of the rubber powder.

[0006] In order to solve the above technical problems, an embodiment of the present application provides a rubber powder asphalt mixing mechanism, including a tank body and a rotating shaft rotatably arranged in the tank body, the upper layer of the tank body is provided with a plurality of anchor-type upper scraping paddles, the lower layer of the tank body is provided with a plurality of anchor-type lower scraping paddles, and the tank body is provided with two gap-adjustable stirring components respectively used to control the adjustment of the anchor-type upper scraping paddles or the anchor-type lower scraping paddles. The rotating shaft is a hollow structure, and the tank body is provided with a heat transfer component for transferring heat to the rotating shaft through heat transfer oil, and the heat transfer component can drive the gap-adjustable stirring component to work.

[0007] In some embodiments, the gap-adjustable stirring component includes a plurality of support frames respectively arranged on the tank body, a driving member is provided on the support frame, a plurality of sliding rods are provided on the side of the anchor-type upper scraper paddle close to the rotating shaft, and a sliding member is provided between the rotating shaft and the anchor-type upper scraper paddle.

[0008] In some embodiments, the driving member includes a driving shaft rotatably arranged on a support frame, the driving shaft and the rotating shaft are provided with meshing transmission gears, and the support frame is provided with a driving motor.

[0009] In some embodiments, the sliding member includes a plurality of sliding racks arranged on a rotating shaft, the sliding rods are respectively slidably arranged on adjacent sliding racks, and a deflection rod is rotatably arranged on the sliding rod located in the middle.

[0010] In some embodiments, a discharge hole is provided on the sliding frame, and one end of the sliding rod adjacent to the discharge hole is chamfered.

[0011] In some embodiments, the anchor-type upper scraper paddle and the anchor-type lower scraper paddle are both triangular prism structures, and the side close to the inner wall of the tank body is chamfered.

[0012] In some embodiments, the heat transfer component includes an oil return chamber arranged on the outside of the top of the rotating shaft, a pipeline component connected to the rotating shaft and the oil return chamber is arranged on the outside of the tank body, two pressure lifting components for respectively controlling the operation of the gap-adjustable stirring component are arranged in the tank body, and a heat transfer component is arranged on the rotating shaft.

[0013] In some embodiments, the piping components include a thermal oil tank arranged on a support frame, and the thermal oil tank is provided with an oil return pipe and an oil outlet pipe. The oil return chamber is located at one end outside the tank body and is provided with a fixed chamber 1 for rotation through a sealed bearing. The rotating shaft is located at one end outside the tank body and is provided with a fixed chamber 2 for rotation through a sealed bearing. The oil return pipe is connected to the fixed chamber 1, and the oil outlet pipe is connected to the fixed chamber 2.

[0014] In some embodiments, the pressure lifting member includes an adjusting chamber connected to the rotating shaft, the diameter of the adjusting chamber is larger than the diameter of the rotating shaft, a return spring is arranged in the adjusting chamber, a lifting plate is arranged at the end of the return spring, an oil drain pipe is arranged on the lifting plate, the outer wall of the oil drain pipe is in contact with the inner wall of the hollow position of the rotating shaft, a plurality of oil drain holes are opened on the oil drain pipe, a plurality of radial columns are arranged on the lifting plate, and a connecting plate is arranged between the plurality of radial columns.

[0015] In some embodiments, the heat transfer element includes a plurality of hollow screw propellers respectively arranged on a sliding frame, each of the sliding frames is provided with a drainage groove connected to the rotating shaft, and the end of the hollow screw propeller away from the sliding frame is connected to an oil return branch pipe, the oil return branch pipe located on the upper layer of the tank body is connected to the oil return chamber, and an oil return connecting pipe is provided between the oil return branch pipe located on the upper layer of the tank body and the adjacent oil return branch pipe located on the lower layer of the tank body.

[0016] The present invention has at least the following beneficial effects: 1. Layered scraping design: By arranging multiple anchor-type upper scraping paddles on the upper layer of the tank and multiple anchor-type lower scraping paddles on the lower layer of the tank, the scraping function is divided into different zones, avoiding the high resistance problem of a single scraper covering the entire tank wall, reducing the operating load of the agitator shaft, and allowing the agitator shaft to maintain a higher speed, thereby enhancing the axial material conveying capacity and overall mixing efficiency; 2. Gap-adjustable stirring component: Two adjustment components, one for controlling the gap between the anchor-type upper scraper paddle and the other for controlling the gap between the anchor-type lower scraper paddle, dynamically adjust the gap between the scraper paddle and the tank wall according to the rubber powder settling position and viscosity distribution (e.g., reducing the gap at the tank bottom to enhance scraping of settled agglomerates, and increasing the gap at the tank top to reduce ineffective resistance). This increases the local shear force in a targeted manner to prevent rubber powder from accumulating and forming agglomerates at the tank bottom. 3. Hollow rotating shaft + heat transfer oil: The rotating shaft is hollow in structure and heat transfer components are used to pass heat transfer oil into the rotating shaft for heat transfer. The rotating shaft is directly used as a heat conduction carrier to efficiently transfer heat to various areas in the tank (especially the bottom area prone to temperature drop), compensating for the temperature loss caused by heat absorption of rubber powder, avoiding rapid local temperature drop, and thus suppressing abnormal increase in asphalt viscosity. 4. Reduce ineffective energy consumption: By reducing the overall stirring resistance through partitioned scraping, and coordinating with thermal oil for precise thermal compensation to avoid overheating, the motor load and heat energy consumption can be reduced while ensuring the mixing effect, thereby improving production energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the planar structure of the present invention; Figure 3 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of area A in the middle; Figure 5 This is a schematic structural diagram of the heat transfer component of the present invention; Figure 6 This is another schematic diagram of the cross-sectional structure of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of the middle B area; Figure 8 This is a schematic diagram of the overall planar cross-section structure of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of the middle C area; Figure 10 For the present invention Figure 8 Schematic diagram of the enlarged structure of the middle D area; Figure 11 This is a schematic diagram of the structure of the gap-adjustable stirring component of the present invention; Figure 12 For the present invention Figure 11 Schematic diagram of the local cross-section structure; Figure 13 For the present invention Figure 12 Schematic diagram of the enlarged structure of the middle E area; Figure 14 This is a schematic diagram of the combined structure of a single anchor-type bottom scraping propeller and a hollow ribbon propeller of the present invention; Figure 15 It is a schematic diagram of the motion state of the anchored upper scraper paddle and the anchored lower scraper paddle of the present invention.

[0018] In the figure: 1. Tank; 2. Rotating shaft; 3. Anchored upper scraper paddle; 4. Anchored lower scraper paddle; 5. Gap-adjustable stirring element; 51. Support frame; 52. Sliding rod; 6. Driving element; 61. Driving shaft; 62. Transmission gear; 63. Driving motor; 7. Sliding element; 71. Sliding frame; 72. Deflection rod; 8. Heat transfer element; 81. Oil return chamber; 9. Piping element; 91. Thermal oil tank; 92. Oil return Pipe; 93, oil outlet pipe; 94, fixed chamber 1; 95, fixed chamber 2; 10, pressure lifter; 101, regulating chamber; 102, return spring; 103, lift plate; 104, oil drain pipe; 105, oil drain hole; 106, radial column; 107, connecting plate; 11, heat transfer element; 111, hollow ribbon propeller; 112, drain trough; 113, oil return branch pipe; 114, oil return connecting pipe; 12, discharge hole. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0020] See also Figures 1-15 , the present invention provides a technical solution: The crumb rubber asphalt mixing mechanism includes a tank body 1 and a rotating shaft 2 rotatably disposed within the tank body 1. A plurality of anchor-type upper scraping paddles 3 are disposed on the upper layer of the tank body 1, and a plurality of anchor-type lower scraping paddles 4 are disposed on the lower layer of the tank body 1. Two gap-adjustable stirring components 5 are disposed within the tank body 1, each for controlling the adjustment of the anchor-type upper scraping paddles 3 or the anchor-type lower scraping paddles 4. The rotating shaft 2 is a hollow structure. A heat transfer component 8 is disposed within the tank body 1 for transferring heat to the rotating shaft 2 through heat transfer oil. The heat transfer component 8 can drive the gap-adjustable stirring component 5 to operate. The tank body 1 is made of materials and sizes that meet chemical standards. It is a common structure and will not be described in detail here. The tank body 1 is equipped with an anchor-type upper scraper 3 and an anchor-type lower scraper 4, which are optimized for different areas in the rubber powder mixing process to ensure the rubber powder dispersion effect and mixing efficiency. Figure 15 : The anchor-type upper scraper paddle 3 is located in the upper middle part of the tank body 1, i.e., the initial mixing zone near the rubber powder addition point. When the rubber powder is first added, the asphalt absorbs heat and swells, causing thickening and significant resistance increase. The rotation speed of the rotating shaft 2 is forced to decrease. At this time, the axial flow and local shear in the high-viscosity area are insufficient. In addition, the rubber powder preferentially absorbs the heat of the surrounding asphalt, causing the viscosity to further increase. To address this issue, low-pressure heat transfer oil is introduced to circulate in the initial mixing zone. Furthermore, the anchor-type upper scraping paddle 3 does not touch the inner wall of the tank 1 (moves), and the anchor-type lower scraping paddle 4 does not touch the inner wall of the tank 1 (does not move), thereby reducing stirring resistance and increasing the rotation speed of the rotating shaft 2 to improve mixing efficiency. At the same time, by adjusting the position of the paddles, the shear force distribution in the initial mixing zone can be optimized, promoting the initial dispersion of the rubber powder and asphalt. The anchored lower scraper paddle 4 is located in the lower middle portion and bottom of the tank body 1, i.e., in the rubber powder settling zone near the tank bottom where the rubber powder settles. In this zone, the rubber powder settles after a period of mixing. The thickening effect caused by the asphalt absorbing heat and swelling also reduces the rotation speed of the rotating shaft 2. The insufficient axial flow and local shear in the high-viscosity area, coupled with the preferential heat absorption of the rubber powder, further exacerbate the viscosity increase. At this time, high-pressure heat transfer oil is introduced, allowing the heat transfer oil to circulate in the initial mixing zone and the rubber powder settling zone. The anchored upper scraper paddle 3 does not touch the inner wall of the tank body 1 (moves more), while the anchored lower scraper paddle 4 does not touch the inner wall of the tank body 1 (moves), thereby reducing resistance and increasing the rotation speed of the rotating shaft 2. In addition, during the rotation of the rotating shaft 2, the heat transfer component 8 will successively introduce heat transfer oil into the initial mixing area and the rubber powder settling area to compensate for the temperature drop caused by the increase in viscosity, ensure the dispersion effect of the rubber powder, effectively alleviate the negative impact of the temperature drop on the dispersion of the rubber powder, and ensure that the asphalt and the rubber powder are fully mixed. The uniform heat transfer of the heat transfer oil helps to maintain the fluidity of the asphalt and avoid the problem of rubber powder agglomeration caused by local overcooling; It should be noted that when the rubber powder is mixed, an adhesion layer will be formed on the inner wall of the tank body 1 due to the action of centrifugal force. The adhesion layer will also cause local temperature drop and affect the dispersion effect of the rubber powder. Therefore, after mixing for a period of time, it is necessary to simultaneously adjust the anchor type upper scraping paddle 3 and the anchor type lower scraping paddle 4 to be close to the inner wall of the tank body 1 to timely scrape off the rubber powder in the adhesion layer. This operation can further improve the dispersion uniformity of the rubber powder, avoid mixing dead corners caused by the adhesion layer, and ensure the quality stability of the final product. In order to ensure that the anchor type upper scraping paddle 3 and the anchor type lower scraping paddle 4 are close to the inner wall of the tank body 1 at the same time, it is necessary to control the initial positions of the anchor type upper scraping paddle 3 and the anchor type lower scraping paddle 4, that is, the distance between the anchor type upper scraping paddle 3 and the inner wall of the tank body 1 is greater than the distance between the anchor type lower scraping paddle 4 and the inner wall of the tank body 1; Both the anchor-type upper scraping paddle 3 and the anchor-type lower scraping paddle 4 are provided with a gap-adjustable stirring component 5, and the following is based on the stirring component 5 located on the anchor-type upper scraping paddle 3; The gap-adjustable stirring member 5 includes a plurality of support frames 51 respectively provided on the tank body 1, a driving member 6 is provided on the support frame 51, a plurality of sliding rods 52 are provided on the side of the anchor-type upper scraping paddle 3 close to the rotating shaft 2, and a sliding member 7 is provided between the rotating shaft 2 and the anchor-type upper scraping paddle 3; The support frame 51 is a key component of the tank body 1's structural stability. Its layout must take into account equipment operational safety, ease of operation, and long-term durability. Although this solution only shows a portion of the support frame 51, such as the directly visible support structure for the rotating shaft 2 or the heat transfer component 8 on the top or around the tank body 1, in actual application, the design of the support frame 51 must cover more functional scenarios to meet the full process operation requirements: To facilitate operators to enter the tank body 1 for inspection, cleaning or maintenance (such as cleaning adhesive layer powder, checking the status of heat transfer components 8), a dedicated "walking support" structure is required. Such support is usually manifested as a ladder, platform or guardrail system extending from the outside or inside of the tank body 1. The material must be non-slip and corrosion-resistant and meet the safety standards for high-altitude operations; During long-term operation, the tank body 1 may be subject to deformation risks due to the impact of stirring of high-viscosity materials inside, temperature cycling (such as expansion and contraction caused by heating of thermal oil), or external loads (such as wind loads and earthquakes). Therefore, it is necessary to add a "reinforcement support" structure to the outer wall of the tank body 1, which is usually manifested in ribs, stiffeners, or truss systems distributed longitudinally or circumferentially along the tank body 1; In addition, in order to completely scrape off the adhesive on the inner wall of the tank body 1, the anchor-type upper scraping paddle 3 and the anchor-type lower scraping paddle 4 can be lengthened so that the anchor-type upper scraping paddle 3 and the anchor-type lower scraping paddle 4 can completely cover the inner wall of the tank body 1 after being combined; The driving member 6 includes a driving shaft 61 rotatably mounted on the support frame 51 , wherein a transmission gear 62 meshing with the driving shaft 61 and the rotating shaft 2 is provided, and a driving motor 63 is provided on the support frame 51 ; The driving motor 63 drives the driving shaft 61 to rotate, and the driving shaft 61 drives the transmission gear 62 thereon to rotate. Driven by the transmission gear 62, the rotating shaft 2 is driven to rotate, thereby realizing the rotation of the anchor type upper scraping paddle 3 and the anchor type lower scraping paddle 4; The sliding member 7 includes a plurality of sliding frames 71 arranged on the rotating shaft 2, and the sliding rods 52 are respectively slidably arranged on adjacent sliding frames 71, and a deflection rod 72 is rotatably arranged on the sliding rod 52 located in the middle; The sliding frame 71 is a dynamic component in the mixing system. Its structural design directly affects the mixing efficiency of rubber powder and asphalt and the stability of equipment operation. In this solution, the sliding frame 71 adopts an inclined structure on both sides. This design not only significantly reduces the mechanical resistance during rotation, but also achieves efficient shearing of rubber powder and asphalt through fluid dynamics optimization: The inclined surface of the sliding frame 71 guides the rubber powder and asphalt mixture to the front of the rotation direction, reducing the direct impact resistance of the material on the blades. Compared with vertical blades, the inclined structure can more effectively disperse material accumulation and avoid the sudden increase in torque caused by local high-pressure areas. The inclined angle allows the sliding frame 71 to apply shear force to the material during rotation while converting part of the radial force into an axial force component, thereby reducing the driving power required by the rotating shaft 2. The inclined surface can also reduce the retention of rubber powder or asphalt at the edge of the sliding frame 71, avoiding the formation of an adhesion layer due to local accumulation of rubber powder or asphalt, further reducing rotational resistance and preventing mixing dead corners. The length of the sliding rod 52 rotatably connected to the deflection rod 72 is longer than that of other sliding rods 52 , thereby preventing the deflection rod 72 from being too long and increasing resistance during rotation. Example 2

[0021] See also Figures 1-10 , the present invention provides a technical solution: The rubber powder asphalt mixing mechanism, the sliding frame 71 is provided with a discharge hole 12, the sliding rod 52 is chamfered at one end near the discharge hole 12, and the sliding frame 71 is provided with a shift chute, the discharge hole 12 is located inside the shift chute, and the two are connected, the width of the discharge hole 12 is the same as the width of the shift chute on the sliding frame 71, when the sliding rod 52 approaches the side of the rotating shaft 2 along the sliding frame 71, the material in the shift chute can be discharged from the top or the discharge hole 12, especially when the asphalt mixing is completed and needs to be discharged, the material can be discharged, and when the sliding rod 52 moves, the chamfered structure on the sliding rod 52 can guide the material to slide along the inclined surface to avoid the material being clamped between the sliding rod 52 and the shift chute. Example 3

[0022] See also Figure 11-14 , the present invention provides a technical solution: The rubber powder asphalt mixing mechanism, the anchor type upper scraper paddle 3 and the anchor type lower scraper paddle 4 are both triangular prism structures, that is, cylindrical bodies with triangular cross-sections, and the side close to the inner wall of the tank body 1 is chamfered. The three edges of the triangle will exert periodically changing local shear forces on the mixture during rotation, forming a "micro-vortex" effect. This shear force distribution can not only break up rubber powder agglomerates, but also avoid energy waste caused by global high shear. At the same time, the asymmetric structure of the triangular prism can promote the coupling of axial and radial flows, and enhance mixing uniformity. The triangular prism structure can reduce the resistance of the anchor type upper scraper paddle 3 and the anchor type lower scraper paddle 4 during rotation. At the same time, the chamfering treatment on the side close to the tank body 1 can make the anchor type upper scraper paddle 3 and the anchor type lower scraper paddle 4 closer to the inner wall of the tank body 1, thereby improving the scraping effect. Example 4

[0023] See also Figures 1-15 , the present invention provides a technical solution: Crumb rubber asphalt mixing mechanism, the heat transfer component 8 includes an oil return chamber 81 disposed on the outside of the top of the rotating shaft 2. A pipe component 9 is disposed on the outside of the tank body 1, connecting the rotating shaft 2 and the oil return chamber 81. Two pressure lifters 10 are disposed within the tank body 1, which respectively control the operation of the gap-adjustable mixing component 5. A heat transfer component 11 is disposed on the rotating shaft 2. The oil return chamber 81 also rotates with the rotating shaft 2 and is rotatably connected to the top of the tank body 1 via a sealed bearing. The piping member 9 includes a thermal oil tank 91 mounted on the support frame 51. The thermal oil tank 91 is provided with an oil return pipe 92 and an oil outlet pipe 93. The oil return chamber 81 is located at one end outside the tank body 1 and is rotatably provided with a fixed chamber 1 94 via a sealed bearing. The rotating shaft 2 is located at one end outside the tank body 1 and is rotatably provided with a fixed chamber 2 95 via a sealed bearing. The oil return pipe 92 is connected to the fixed chamber 1 94, and the oil outlet pipe 93 is connected to the fixed chamber 2 95. Since the rotating shaft 2 and the oil return chamber 81 need to rotate continuously, and the heat transfer oil pipeline must remain fixed, a fixed chamber 1 94 and a fixed chamber 2 95 are set between the fixed structure and the rotating component. The two are connected by a sealed bearing to achieve rotation. This ensures smooth flow of heat transfer oil in and out while effectively preventing leakage. The sealed bearing is made of high-temperature and corrosion-resistant materials (such as fluororubber or graphite composite materials). Its inner and outer rings are tightly matched with the fixed cavity and the rotating shaft 2 respectively, ensuring both rotational flexibility and maintaining the sealing of the oil circuit. The fixed cavity 1 94 is responsible for collecting the return oil, and the fixed cavity 2 95 is responsible for injecting the heat transfer oil. The two work together to form a complete circulation path, providing stable heat conduction support for the interior of the tank body 1. The oil outlet pipe 93 is integrated with a pressure regulating valve, a flow regulating valve, and an oil heating device to form a multifunctional control module. The pressure regulating valve dynamically balances the pipeline pressure to avoid system overpressure caused by the expansion of the thermal oil due to temperature rise. The flow regulating valve accurately controls the oil inlet / return rate to match the stirring power with the heat load requirement of the tank 1. The oil heating device (such as an electric heating sleeve or a circulating heating jacket) heats the thermal oil a second time to compensate for pipeline heat loss and ensure that the temperature of the oil injected into the tank 1 is stable within the set range. The pressure lifter 10 includes an adjustment chamber 101 in communication with the rotating shaft 2. The diameter of the adjustment chamber 101 is larger than that of the rotating shaft 2. A return spring 102 is disposed in the adjustment chamber 101. A lifting plate 103 is disposed at the end of the return spring 102. An oil drain pipe 104 is disposed on the lifting plate 103. The outer wall of the oil drain pipe 104 is in contact with the inner wall of the hollow portion of the rotating shaft 2. A plurality of oil drain holes 105 are formed on the oil drain pipe 104. A plurality of radial columns 106 are disposed on the lifting plate 103. Connecting plates 107 are disposed between the plurality of radial columns 106. The elastic force of the return spring 102 located at the upper layer of the tank body 1 is smaller than the elastic force of the return spring 102 located at the lower layer of the tank body 1. Therefore, when the pressure of the heat transfer oil introduced is relatively low, the heat transfer oil can circulate in the initial mixing zone, and the anchor-type upper scraper paddle 3 does not touch the inner wall of the tank body 1 (moves), and the anchor-type lower scraper paddle 4 does not touch the inner wall of the tank body 1 (does not move); when the pressure of the heat transfer oil introduced is medium, the heat transfer oil can circulate in the initial mixing zone and the rubber powder settling zone, and the anchor-type upper scraper paddle 3 does not touch the inner wall of the tank body 1 (moves more), and the anchor-type lower scraper paddle 4 does not touch the inner wall of the tank body 1 (moves); when the pressure of the heat transfer oil introduced is relatively high, the heat transfer oil can circulate in the initial mixing zone and the rubber powder settling zone, and at the same time, the anchor-type upper scraper paddle 3 and the anchor-type lower scraper paddle 4 are adjusted to be close to the inner wall of the tank body 1; Because the return spring 102 will become fatigued after being used for a period of time and cannot meet the predetermined usage requirements, the adjustment chamber 101 and the rotating shaft 2 are connected by a flange. When the return spring 102 cannot meet the requirements, the return spring 102 can be disassembled through the flange; The radial column 106 is movable through the adjustment cavity 101, and its two ends are fixed to the cavity through sealed bearings. The sealed bearings are made of high-temperature resistant fluororubber, which not only ensures the free rotation of the radial column 106, but also effectively prevents the leakage of heat transfer oil, ensuring the stability of the pressure in the adjustment cavity 101. The connecting plate 107 is rotatably connected to the multiple deflection rods 72. When the connecting plate 107 moves downward, it can drive the multiple deflection rods 72 to rotate synchronously, thereby driving the multiple sliding rods 52 to shift to the surroundings. A limiting protrusion is provided in the adjustment cavity 101 for locking and limiting the lifting plate 103; The heat transfer element 11 includes a plurality of hollow ribbon paddles 111 respectively arranged on the sliding frame 71. The sliding frame 71 is provided with a drainage groove 112 connected to the rotating shaft 2. The end of the hollow ribbon paddle 111 away from the sliding frame 71 is connected to an oil return branch pipe 113. The oil return branch pipe 113 located on the upper layer of the tank body 1 is connected to the oil return chamber 81. An oil return connecting pipe 114 is provided between the oil return branch pipe 113 located on the upper layer of the tank body 1 and the adjacent oil return branch pipe 113 located on the lower layer of the tank body 1. In this solution, three anchor-type upper scraping paddles 3 and three anchor-type lower scraping paddles 4 are provided. Therefore, three hollow ribbon paddles 111 are provided on the upper and lower layers of the tank body 1. However, there is no limit to the number of these paddles. Because the oil return branch pipe 113 and the oil return connecting pipe 114 are designed so as not to interfere with the sliding frame 71 or other structures, the number of turns of the hollow ribbon paddle 111 cannot be designed to be an integer multiple, and the product of the number of turns and the pitch of the hollow ribbon paddle 111 cannot be greater than the spacing between two adjacent sliding frames 71. The specific number of turns and pitch are not limited and can be adjusted according to actual conditions. After the heat transfer oil is introduced, the oil discharge pipe 104 moves downward, driving the lifting plate 103 and the radial column 106 to move downward. The radial column 106 drives the connecting plate 107 to move downward. The connecting plate 107 achieves the displacement of the sliding rod 52 by squeezing the deflection rod 72, thereby pushing the anchor-type upper scraping paddle 3 toward the inner wall of the tank body 1. The heat transfer oil enters the regulating chamber 101 from the oil discharge hole 105, and then enters the drainage groove 112 on the sliding frame 71. Then, it enters the oil return branch pipe 113 through the hollow ribbon paddle 111 and directly returns to the oil return chamber 81. The heat transfer oil in the oil return branch pipe 113 located at the lower layer of the tank body 1 needs to enter the oil return branch pipe 113 located at the upper layer of the tank body 1 through the oil return connecting pipe 114 and then return to the oil return chamber 81.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A rubber powder asphalt stirring mechanism, comprising a tank body (1) and a rotating shaft (2) rotatably arranged in the tank body (1), characterized in that: The upper layer of the tank body (1) is provided with a plurality of anchor-type upper scraping paddles (3), the lower layer of the tank body (1) is provided with a plurality of anchor-type lower scraping paddles (4), and the tank body (1) is provided with two gap-adjustable stirring components (5) for controlling the adjustment of the anchor-type upper scraping paddles (3) or the anchor-type lower scraping paddles (4), respectively. The rotating shaft (2) is a hollow structure, and the tank body (1) is provided with a heat transfer component (8) for transferring heat to the rotating shaft (2) through heat transfer oil, and the heat transfer component (8) can drive the gap-adjustable stirring component (5) to work.

2. The crumb rubber asphalt stirring mechanism according to claim 1, characterized in that: The gap-adjustable stirring component (5) comprises a plurality of support frames (51) respectively arranged on the tank body (1), a driving member (6) being arranged on the support frames (51), a plurality of sliding rods (52) being arranged on the side of the anchor-type upper scraping paddle (3) close to the rotating shaft (2), and a sliding member (7) being arranged between the rotating shaft (2) and the anchor-type upper scraping paddle (3).

3. The crumb rubber asphalt stirring mechanism according to claim 2, characterized in that: The driving member (6) comprises a driving shaft (61) rotatably arranged on a support frame (51), a transmission gear (62) meshing with each other is arranged on the driving shaft (61) and the rotating shaft (2), and a driving motor (63) is arranged on the support frame (51).

4. The crumb rubber asphalt stirring mechanism according to claim 2, characterized in that: The sliding member (7) comprises a plurality of sliding frames (71) arranged on the rotating shaft (2), the sliding rods (52) are respectively slidably arranged on adjacent sliding frames (71), and a deflection rod (72) is rotatably arranged on the sliding rod (52) located in the middle.

5. The rubber powder asphalt stirring mechanism according to claim 4, characterized in that: A discharge hole (12) is provided on the sliding frame (71), and one end of the sliding rod (52) close to the discharge hole (12) is chamfered.

6. The crumb rubber asphalt stirring mechanism according to any one of claims 1 to 5, characterized in that: The anchor-type upper scraper paddle (3) and the anchor-type lower scraper paddle (4) are both triangular prism structures, and the sides close to the inner wall of the tank body (1) are both chamfered.

7. The rubber-powder asphalt stirring mechanism according to claim 4, characterized in that: The heat transfer component (8) includes an oil return chamber (81) arranged on the outside of the top of the rotating shaft (2); a pipeline component (9) connected to the rotating shaft (2) and the oil return chamber (81) is arranged on the outside of the tank body (1); two pressure lifting components (10) for respectively controlling the operation of the gap-adjustable stirring component (5) are arranged in the tank body (1); and a heat transfer component (11) is arranged on the rotating shaft (2).

8. The crumb rubber asphalt stirring mechanism according to claim 7, characterized in that: The pipeline component (9) includes a heat transfer oil tank (91) arranged on a support frame (51), and an oil return pipe (92) and an oil outlet pipe (93) are arranged on the heat transfer oil tank (91). The oil return chamber (81) is located outside the tank body (1) and is provided with a fixed chamber 1 (94) at one end thereof through a sealed bearing for rotation. The rotating shaft (2) is located outside the tank body (1) and is provided with a fixed chamber 2 (95) at one end thereof through a sealed bearing for rotation. The oil return pipe (92) and the fixed chamber 1 (94) are communicated with each other, and the oil outlet pipe (93) and the fixed chamber 2 (95) are communicated with each other.

9. The crumb rubber asphalt stirring mechanism according to claim 7, characterized in that: The pressure lifting member (10) includes an adjusting chamber (101) connected to the rotating shaft (2), the diameter of the adjusting chamber (101) is larger than the diameter of the rotating shaft (2), a return spring (102) is provided in the adjusting chamber (101), a lifting plate (103) is provided at the end of the return spring (102), an oil drain pipe (104) is provided on the lifting plate (103), the outer wall of the oil drain pipe (104) is in contact with the inner wall of the hollow position of the rotating shaft (2), a plurality of oil drain holes (105) are provided on the oil drain pipe (104), a plurality of radial columns (106) are provided on the lifting plate (103), and a connecting plate (107) is provided between the plurality of radial columns (106).

10. The crumb rubber asphalt stirring mechanism according to claim 7, characterized in that: The heat transfer element (11) includes a plurality of hollow spiral blades (111) respectively arranged on the sliding frame (71). The sliding frame (71) is provided with a drainage groove (112) connected to the rotating shaft (2). The end of the hollow spiral blade (111) away from the sliding frame (71) is connected to an oil return branch pipe (113). The oil return branch pipe (113) located on the upper layer of the tank body (1) is connected to the oil return chamber (81). An oil return connecting pipe (114) is provided between the oil return branch pipe (113) located on the upper layer of the tank body (1) and the adjacent oil return branch pipe (113) located on the lower layer of the tank body (1).

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