A melting device for producing a cutback asphalt

Abstract

The utility model relates to the production field of pitch, especially a kind of melting device for blending pitch production, including main warehouse;It further includes first motor, the upper end of main warehouse is provided with mounting frame, the inside rotation of mounting frame is connected with the comminuting roller of front-back symmetry, the right end of mounting frame is rotatably connected with the first gear of front-back symmetry, two first gears are connected with its corresponding comminuting roller, two first gears are engaged, first motor is fixedly connected with mounting frame, the output of first motor is connected with front comminuting roller, first motor is used to drive front comminuting roller to rotate;The utility model is driven front comminuting roller by being provided with first motor, and rear comminuting roller is driven by two first gears and is synchronously relatively inwardly rotated, and the big pitch of high-speed counter-rotating roller tooth rolling, shearing is input, effectively crushes and prevents its impact main warehouse inner wall, guarantees equipment structure integrity, while ensuring that material is fully broken to improve subsequent melting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of asphalt production, and in particular to a melting device for blending asphalt production. Background Technology

[0002] The melting device for blended asphalt production is a core piece of equipment that melts solid asphalt raw materials through indirect heating with heat transfer oil. It precisely controls the melt viscosity to ensure that key indicators such as softening point and ductility of the modified asphalt product meet the standards, serving road engineering and waterproof membrane production.

[0003] Existing melting equipment for blended asphalt production suffers from problems such as frequent impact damage to the inner wall of the main melting chamber, low heat transfer efficiency, and disruption of production continuity due to the direct feeding of large pieces of asphalt raw materials into the main melting chamber without a pre-crushing mechanism.

[0004] Therefore, in view of the problems of frequent impact damage to the inner wall of the main silo and low heat transfer efficiency caused by the direct input of large pieces of asphalt into the existing melting device for blended asphalt production, there is an urgent need to design a new type of melting device for blended asphalt production. Utility Model Content

[0005] In order to overcome the problems of frequent impact damage to the inner wall of the main silo and low heat transfer efficiency caused by the direct input of large pieces of asphalt into the melting device used for blending asphalt production.

[0006] The technical solution of this utility model is as follows: a melting device for blending asphalt production, including a main bin; and a first motor. An installation frame is provided at the upper end of the main bin. A symmetrical crushing roller is rotatably connected inside the installation frame. A symmetrical first gear is rotatably connected at the right end of the installation frame. The two first gears are connected to their corresponding crushing rollers and mesh with each other. The first motor is fixedly connected to the installation frame. The output end of the first motor is connected to the front crushing roller. The first motor is used to drive the front crushing roller to rotate. When the front crushing roller rotates, it drives the two front and rear first gears to rotate relative to each other. When the rear first gear rotates, it drives the rear crushing roller to rotate. An auxiliary discharge module is provided at the lower end of the main bin. An electric opening and closing module is provided on the upper front side of the main bin. A heating module is provided on the outer surface of the main bin.

[0007] Preferably, by setting a first motor, the first motor drives the front crushing roller to rotate. When the crushing roller shaft rotates, it drives the rear crushing roller to rotate synchronously through two first gears. This gear meshing transmission method ensures that the two crushing rollers always maintain relative inward rotation. When large pieces of asphalt are put into the main bin, they are immediately subjected to the crushing and shearing action of the high-speed rotating roller teeth, completely disintegrating their structure. This effectively eliminates the risk of large pieces of material directly impacting the inner wall of the main bin, ensuring the structural integrity of the equipment, and ensuring that the material is fully crushed to improve the subsequent melting efficiency. This solves the problem of frequent impact damage to the inner wall of the main bin, low heat conduction efficiency, and production continuity obstruction caused by the direct input of large pieces of asphalt raw materials into the melting main bin and the lack of a pre-crushing mechanism in existing melting devices for blended asphalt production.

[0008] Preferably, the auxiliary discharge module includes a second gear, a sliding frame fixedly installed at the lower end of the main chamber, a first baffle slidably connected inside the sliding frame, a groove opened at the left end of the sliding frame, an operating handle slidably connected inside the groove, the first baffle fixedly connected to the operating handle, a first pipe fixedly installed at the lower end of the sliding frame, a gear ring rotatably connected to the lower end of the first pipe, a second pipe rotatably connected to the lower end of the gear ring, an installation platform fixedly installed on the right side of the outer surface of the second pipe, a second motor fixedly installed at the upper end of the installation platform, a second gear fixedly connected to the output end of the second motor, the second motor driving the second gear to rotate, the second gear meshing with the gear ring, when the second gear rotates, driving the gear ring to rotate, an installation plate fixedly installed inside the gear ring, a stirring rod fixedly installed at the upper end of the installation plate, when the gear ring rotates, driving the installation plate and the stirring rod to rotate.

[0009] Preferably, the heating module includes a jacket, which is fixedly connected to the main chamber, and third pipes are fixedly installed on both the left and right sides of the outer surface of the jacket.

[0010] Preferably, the electric opening and closing module includes a third motor, an installation groove is provided on the upper front side of the main compartment, and connecting grooves are provided on both the left and right ends of the installation groove. The third motor is fixedly connected to the main compartment, and a transmission component is provided inside the connecting groove on the right side.

[0011] Preferably, the transmission component includes a lead screw, which is rotatably connected to the right-side connecting groove. The output end of the third motor is connected to the lead screw, and the third motor is used to drive the lead screw to rotate. A sliding element is provided on the outer surface of the lead screw.

[0012] Preferably, the sliding component includes a main slider, which is threadedly connected to a lead screw. A second baffle is fixedly installed at the left end of the main slider. When the lead screw rotates, it drives the main slider and the second baffle to move.

[0013] Preferably, a limiting rod is fixedly installed inside the left connecting groove, and a secondary slider is slidably connected to the outer surface of the limiting rod. The right end of the secondary slider is fixedly connected to the left end of the second baffle. When the second baffle moves, it drives the secondary slider to slide on the limiting rod.

[0014] The beneficial effects of this utility model are:

[0015] 1. The front crushing roller is driven to rotate by the first motor, and the rear crushing roller is driven to rotate synchronously by the two first gears. This gear meshing structure ensures that the two crushing rollers always maintain an inward counter-rotating motion. The large pieces of asphalt put into the main chamber are then subjected to high-speed counter-rotating crushing and shearing, and are thoroughly crushed. This effectively prevents the direct impact of large pieces of material on the inner wall of the main chamber, ensures the integrity of the equipment structure, and at the same time ensures that the material is fully crushed, creating conditions for improving the subsequent melting efficiency.

[0016] 2. By moving the control handle to drive the first baffle to move, the opening and closing of the discharge port is controlled. When the asphalt melts and needs to be discharged, the control handle is pulled to open the first baffle to allow the liquid asphalt to flow out. At the same time, the second motor is started to drive the second gear meshing gear ring to rotate, which drives the stirring rod to stir in the discharge channel, effectively breaking its flow resistance and local eddies, significantly reducing viscous resistance, thereby directly increasing the discharge flow rate of asphalt. Attached Figure Description

[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of a melting device for producing blended asphalt according to this utility model.

[0018] Figure 2 The diagram shown is a schematic representation of the installation frame structure of a melting device for producing blended asphalt according to this utility model.

[0019] Figure 3 The diagram shown is a schematic representation of the main chamber structure of a melting device for blending asphalt production according to this utility model.

[0020] Figure 4 The diagram shown is a schematic representation of the sliding frame structure of a melting device for producing blended asphalt according to this utility model.

[0021] Figure 5 The diagram shown is a schematic diagram of the installation platform of a melting device for producing blended asphalt according to this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Main chamber; 2. Mounting frame; 3. Crushing roller; 4. First gear; 5. First motor; 6. Sliding frame; 7. First baffle; 8. Slide groove; 9. Control handle; 10. First pipe; 11. Gear ring; 12. Second pipe; 13. Mounting platform; 14. Second motor; 15. Second gear; 16. Mounting plate; 17. Stirring rod; 18. Mounting groove; 19. Connecting groove; 20. Third motor; 21. Lead screw; 22. Main slider; 23. Second baffle; 24. Limiting rod; 25. Secondary slider; 26. Jacket; 27. Third pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Asphalt is an important engineering material that exists naturally in the world or is obtained through the processing of raw materials such as petroleum and coal. At room temperature, it is usually a black or dark brown solid, semi-solid, or even a high-viscosity liquid. Its main components are complex high-molecular-weight hydrocarbons and derivatives containing non-metallic elements such as sulfur, oxygen, and nitrogen. Due to its excellent adhesion, good waterproof and moisture-proof properties, stable chemical properties, and reliable insulation characteristics, asphalt has become a key basic material for constructing modern transportation networks (paving asphalt concrete roads), ensuring the durability of building structures (making waterproof membranes and coatings), stabilizing water conservancy facilities (seepage prevention treatment for dams and reservoirs), protecting industrial equipment (anti-corrosion coatings), and electrical insulation applications. Based on its source and preparation process, asphalt can be broadly classified into natural asphalt that separates naturally, petroleum asphalt obtained through crude oil distillation and subsequent treatments (such as oxidation and solvent deasphalting), and tar pitch derived from the deep processing of coal tar or shale oil. Among these, petroleum asphalt, due to its relatively wide availability and mature processing technology, occupies a dominant position in various engineering applications.

[0025] The production process of asphalt involves various technological routes depending on the different uses and performance requirements of the final product. For straight-run asphalt obtained directly from crude oil atmospheric and vacuum distillation units, or for asphalt of specific specifications obtained through oxidation or other treatment processes, the production process is relatively straightforward. However, engineering practice often requires asphalt products with specific performance indicators, which may not be fully met by base asphalt from a single source. In such cases, the production process of blended asphalt is necessary. The core of blended asphalt production lies in the physical mixing of two or more base asphalt components with different performance characteristics (such as different hardness, viscosity, and temperature stability) according to a pre-designed precise formula ratio. This method allows for flexible adjustment of key performance parameters of the final product, such as penetration, softening point, ductility, viscosity, and aging resistance, to meet the specific needs of different engineering applications. For example, the surface layer of high-grade highways requires asphalt with strong rutting resistance (high hardness), while the base course may require more elastic asphalt. The production of blended asphalt typically follows a relatively fixed process: First, necessary pretreatment operations are performed on the various base asphalt components to be blended. This may include moisture removal (dehydration) or preliminary heating to give them good fluidity, facilitating accurate subsequent metering. Next, the various base components are precisely metered and transported to the core blending equipment according to the designed proportions. In this blending equipment, the most critical step is to ensure that all components reach a uniform melt flow state and are thoroughly mixed to form a stable and consistent mixture. After homogenization, necessary temperature adjustments are sometimes required to bring the final blended asphalt to a suitable state for filling, molding, or direct heat preservation and storage. Finally, the product is filtered to remove any possible small impurities and particles, and then, depending on the needs, it is either solidified or heat-preserved for later use.

[0026] Among the various stages of the asphalt blending production process described above, the effective melting treatment of the base asphalt components is a particularly crucial and necessary step. This is mainly because the base asphalt components involved in blending vary in form. Some components are already in a readily flowing liquid state at room temperature (such as some soft components), but often require the addition of solid or semi-solid asphalt components in proportion. These include de-oiled asphalt particles or lumps obtained from solvent deasphalting units, high-melting-point modifier base asphalt particles, or block asphalt from recycled pavement asphalt (RAP) that needs to be added. These solid or high-viscosity (nearly solid with extremely poor fluidity) materials cannot be uniformly, fully, and effectively mixed with other liquid base asphalt in the blending equipment unless they undergo effective heating and melting treatment beforehand to achieve a molten liquid state with good fluidity or a low-viscosity state. If solid, blocky asphalt is forcibly added to a liquid blending vessel, it easily forms unevenly mixed, undercooked particles, or adheres to the agitator and vessel walls, forming a thick insulating layer that severely hinders heat transfer and uniform material flow. This leads to fluctuations in the final product's performance, even resulting in substandard quality, and also places additional load on production equipment, potentially causing damage. Therefore, before the asphalt blending process or before its core blending equipment, a melting device specifically designed for efficiently and uniformly heating and melting these solid or extremely difficult-to-flow base asphalt components becomes an indispensable key piece of equipment in the entire production line. The main task of this melting device is to safely, quickly, and thoroughly convert solid or semi-solid asphalt components into a molten state with sufficiently low viscosity and flowability suitable for blending, creating the prerequisites for subsequent precise metering, conveying, and efficient mixing and homogenization. The quality of the melting device designed for asphalt blending production directly affects the efficiency, energy consumption, mixing uniformity, and final product quality stability of the entire blending process.

[0027] Please see Figures 1-5This utility model provides an embodiment of a melting device for blending asphalt, comprising a main chamber 1 and a first motor 5. An installation frame 2 is mounted on the upper end of the main chamber 1. Symmetrical crushing rollers 3 are rotatably connected inside the installation frame 2. Symmetrical first gears 4 are rotatably connected to the right end of the installation frame 2, with each first gear 4 connected to its corresponding crushing roller 3 and meshing with it. The first motor 5 is fixedly connected to the installation frame 2, and its output end is connected to the front crushing roller 3. The first motor 5 drives the front crushing roller 3 to rotate. When the front crushing roller 3 rotates, it drives the two front and rear first gears 4 to rotate relative to each other. When the rear first gear 4 rotates, it drives the rear crushing roller 3 to rotate. The main chamber 1 is equipped with an auxiliary discharge module at its lower end and an electric opening and closing module at its upper front end. A heating module is installed on the outer surface of the main chamber 1. A first motor 5 drives the front crushing roller 3 to rotate. When the crushing roller 3 rotates, two first gears 4 drive the rear crushing roller 3 to rotate synchronously. This gear meshing transmission method ensures that the two crushing rollers 3 always maintain relative inward rotation. When large pieces of asphalt are fed into the main chamber 1, they are immediately subjected to the crushing, shearing, and pulverizing action of the high-speed rotating rollers, completely disintegrating their structure. This effectively prevents large pieces of material from directly impacting the inner wall of the main chamber 1, ensuring the structural integrity of the equipment, and simultaneously ensuring that the material is fully crushed to improve subsequent melting efficiency.

[0028] Please see Figures 1-5In this embodiment, the auxiliary discharge module includes a second gear 15. A sliding frame 6 is fixedly installed at the lower end of the main chamber 1. A first baffle 7 is slidably connected inside the sliding frame 6. A groove 8 is opened at the left end of the sliding frame 6. An operating handle 9 is slidably connected inside the groove 8. The first baffle 7 is fixedly connected to the operating handle 9. A first pipe 10 is fixedly installed at the lower end of the sliding frame 6. A gear ring 11 is rotatably connected to the lower end of the first pipe 10. A second pipe 12 is rotatably connected to the lower end of the gear ring 11. The outer surface of the second pipe 12... A mounting platform 13 is fixedly installed on the right side of the device. A second motor 14 is fixedly installed on the upper end of the mounting platform 13. A second gear 15 is fixedly connected to the output end of the second motor 14. The second motor 14 drives the second gear 15 to rotate. The second gear 15 meshes with a gear ring 11. When the second gear 15 rotates, it drives the gear ring 11 to rotate. A mounting plate 16 is fixedly installed inside the gear ring 11. A stirring rod 17 is fixedly installed on the upper end of the mounting plate 16. When the gear ring 11 rotates, it drives the mounting plate 16 and the stirring rod. 17 rotates, and by setting the control handle 9, moving the control handle 9 drives the first baffle 7 to move, realizing the opening and closing control of the discharge port. When the asphalt in the main chamber 1 has melted and needs to be discharged, pull the control handle 9 to open the first baffle 7 to allow the liquid asphalt to flow out. At the same time, the second motor 14 is started to drive the second gear 15 to mesh with the gear ring 11 to rotate, driving the stirring rod 17 to agitate in the discharge channel, breaking the asphalt flow resistance and eliminating local eddies. The dual effect significantly reduces the viscous resistance of the molten asphalt, thereby increasing the asphalt discharge flow rate. The purpose of the heating module is to include a jacket 26, which is fixedly connected to the main chamber 1. Third pipes 27 are fixedly installed on both the left and right sides of the outer surface of the jacket 26. By setting the jacket 26, the outer surface of the main chamber 1 has a sandwich space, which can accumulate heat transfer oil. Then, by setting the third pipes 27, the third pipe 27 on the left continuously sends high-temperature heat transfer oil into the jacket 26 to heat the main chamber 1. Then, the third pipe 27 on the right pumps it out for reheating. This process is repeated to achieve the purpose of heating the asphalt block.

[0029] Please see Figures 1-3In this embodiment, the electric opening and closing module includes a third motor 20. A mounting groove 18 is provided on the upper front side of the main compartment 1. Connecting grooves 19 are provided at both the left and right ends of the mounting groove 18. The third motor 20 is fixedly connected to the main compartment 1. A transmission component is provided inside the right connecting groove 19, including a lead screw 21. The lead screw 21 is rotatably connected to the right connecting groove 19. The output end of the third motor 20 is connected to the lead screw 21, and the third motor 20 drives the lead screw 21 to rotate. A sliding component is provided on the outer surface of the lead screw 21, including a main slider 22. The main slider 22 is threadedly connected to the lead screw 21. A second baffle 23 is fixedly installed on the left end of the main slider 22. When the lead screw 21 rotates, it drives the main slider 22 and the second baffle 23 to move. By setting the third motor 20, the third motor 20 drives the lead screw 21 to rotate during operation. When rotating, the rotation of the main slider 22 is restricted by the right connecting groove 19, thereby driving the main slider 22 to move. When the main slider 22 moves, it drives the second baffle 23 and its connected parts to move together, thereby controlling the opening and closing of the feed port. A limit rod 24 is fixedly installed inside the left connecting groove 19. A secondary slider 25 is slidably connected to the outer surface of the limit rod 24. The right end of the secondary slider 25 is fixedly connected to the left end of the second baffle 23. When the second baffle 23 moves, it drives the secondary slider 25 to slide on the limit rod 24. By setting the secondary slider 25, since the secondary slider 25 is connected to the second baffle 23, when the second baffle 23 moves, it drives the secondary slider 25 to move synchronously. The limit rod 24 restricts the degree of freedom of the secondary slider 25 and provides support for the other side of the second baffle 23, thereby assisting the movement of the second baffle 23.

[0030] During operation, firstly, the third motor 20 is activated by the external controller to drive the second baffle 23 to move horizontally and open the feed inlet at the upper end of the main chamber 1. Then, the first motor 5 is activated to drive the two crushing rollers 3 to rotate and crush the oversized asphalt, preventing it from directly impacting the inner wall of the main chamber 1 and improving the subsequent melting efficiency. Then, the third motor 20 is activated to drive the second baffle 23 to close the feed inlet. Next, high-temperature heat transfer oil is input into the jacket 26 from the left third pipe 27 to continuously heat the main chamber 1, causing the asphalt to melt into a liquid state. The hot oil is pumped out from the right third pipe 27 for reheating and circulation. Finally, when the asphalt is completely melted and needs to be discharged, the operator uses an external long hook tool to pull the control handle 9 to drive the first baffle 7 to move and open the discharge outlet at the lower end of the main chamber 1. The liquid asphalt begins to flow out. At the same time, the second motor 14 is activated to drive the stirring rod 17 to rotate in the discharge channel to agitate, break the asphalt viscosity resistance and eliminate local eddies, significantly increasing the discharge flow rate, thereby completing the melting production of blended asphalt.

[0031] Through the above steps, by setting up a first motor 5, which directly drives the front crushing roller 3 to rotate, when the shaft of the front crushing roller 3 rotates, the rear crushing roller 3 is driven to rotate synchronously through the precise meshing of two first gears 4. The direct meshing of the gears to transmit power fundamentally ensures that the front crushing roller 3 and the rear crushing roller 3 always maintain a relative inward rotational motion during operation. When large pieces of asphalt material are put into the main bin 1, the material immediately encounters the strong crushing force from the teeth of the crushing rollers 3 on the two high-speed counter-rotating crushing rollers 3. The pressing and shearing crushing action, this active and high-intensity roller tooth action, can completely disintegrate the original structure of large pieces of asphalt, completely eliminating the possibility of large pieces of material directly impacting the inner wall of the main silo 1, effectively protecting the integrity of the inner wall of the main silo 1, and at the same time ensuring that the material is fully crushed, laying a solid foundation for improving the melting efficiency of subsequent materials. This solves the problem of frequent impact damage to the inner wall of the main silo 1, low heat transfer efficiency, and production continuity obstruction caused by the direct input of large pieces of asphalt raw materials into the melting main silo 1 and the lack of a pre-crushing mechanism in the existing melting device for blended asphalt production.

Claims

1. A melting device for blending asphalt, comprising a main bin (1); characterized in that: It also includes a first motor (5), an installation frame (2) is provided at the upper end of the main chamber (1), a front and rear symmetrical crushing roller (3) is rotatably connected inside the installation frame (2), a front and rear symmetrical first gear (4) is rotatably connected at the right end of the installation frame (2), the two first gears (4) are connected to their corresponding crushing rollers (3), the two first gears (4) mesh with each other, the first motor (5) is fixedly connected to the installation frame (2), the output end of the first motor (5) is connected to the front crushing roller (3), the first motor (5) is used to drive the front crushing roller (3) to rotate, when the front crushing roller (3) rotates, it drives the front and rear first gears (4) to rotate relative to each other, when the rear first gear (4) rotates, it drives the rear crushing roller (3) to rotate, an auxiliary discharge module is provided at the lower end of the main chamber (1), an electric opening and closing module is provided at the upper front end of the main chamber (1), and a heating module is provided on the outer surface of the main chamber (1).

2. The melting device for blending asphalt production according to claim 1, characterized in that: The auxiliary discharge module includes a second gear (15), a sliding frame (6) is fixedly installed at the lower end of the main chamber (1), a first baffle (7) is slidably connected inside the sliding frame (6), a groove (8) is opened at the left end of the sliding frame (6), an operating handle (9) is slidably connected inside the groove (8), the first baffle (7) is fixedly connected to the operating handle (9), a first pipe (10) is fixedly installed at the lower end of the sliding frame (6), a toothed ring (11) is rotatably connected at the lower end of the first pipe (10), a second pipe (12) is rotatably connected at the lower end of the toothed ring (11), and a second pipe (12) is fixedly installed on the right side of the outer surface of the second pipe (12). There is an installation platform (13), and a second motor (14) is fixedly installed on the upper end of the installation platform (13). The second gear (15) is fixedly connected to the output end of the second motor (14). The second motor (14) is used to drive the second gear (15) to rotate. The second gear (15) meshes with the gear ring (11). When the second gear (15) rotates, it drives the gear ring (11) to rotate. An installation plate (16) is fixedly installed inside the gear ring (11). A stirring rod (17) is fixedly installed on the upper end of the installation plate (16). When the gear ring (11) rotates, it drives the installation plate (16) and the stirring rod (17) to rotate.

3. The melting device for blending asphalt production according to claim 1, characterized in that: The heating module includes a jacket (26), which is fixedly connected to the main chamber (1). A third pipe (27) is fixedly installed on both the left and right sides of the outer surface of the jacket (26).

4. A melting device for blending asphalt production according to claim 1, characterized in that: The electric opening and closing module includes a third motor (20), an installation groove (18) is provided on the upper front side of the main compartment (1), and a connecting groove (19) is provided on both the left and right ends of the installation groove (18). The third motor (20) is fixedly connected to the main compartment (1), and a transmission component is provided inside the connecting groove (19) on the right side.

5. A melting device for blending asphalt production according to claim 4, characterized in that: The transmission component includes a lead screw (21), which is rotatably connected to the right connecting groove (19). The output end of the third motor (20) is connected to the lead screw (21). The third motor (20) is used to drive the lead screw (21) to rotate. The outer surface of the lead screw (21) is provided with a sliding member.

6. A melting device for blending asphalt production according to claim 5, characterized in that: The sliding component includes a main slider (22), which is threadedly connected to a lead screw (21). A second baffle (23) is fixedly installed on the left end of the main slider (22). When the lead screw (21) rotates, it drives the main slider (22) and the second baffle (23) to move.

7. A melting device for blending asphalt production according to claim 6, characterized in that: A limiting rod (24) is fixedly installed inside the left connecting groove (19). A secondary slider (25) is slidably connected to the outer surface of the limiting rod (24). The right end of the secondary slider (25) is fixedly connected to the left end of the second baffle (23). When the second baffle (23) moves, it drives the secondary slider (25) to slide on the limiting rod (24).

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