An asphalt layered melting method and a melting glue machine

Abstract

The present invention discloses an asphalt layered melting method and a melting glue machine, belonging to the technical field of asphalt pretreatment, which includes the following steps: S1. Feeding: feeding sheet asphalt materials into the melting tank from the feed inlet; S2. Stirring: the sheet asphalt contacts the melted asphalt under the push of the stirring paddle, and continuous stirring makes the sheet asphalt and the melted asphalt evenly mixed; S3. Layered heating: the sheet asphalt is heated and melted by a heating element in the melting area of the upper layer of the melting tank, and after melting, the asphalt flows into the strong heating area of the lower layer of the melting tank, and the heating element in the strong heating area rapidly raises the temperature of the asphalt, and evenly heats the asphalt to the set discharge temperature; S4. Discharging: the asphalt is continuously stirred in the strong heating area, and is extruded and discharged by the stirring paddle in the strong heating area. While discharging, sheet asphalt materials are added to the melting tank for supplementation to keep the total amount of asphalt in the melting tank unchanged; S5. Circulation, the asphalt has high and uniform heating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt pretreatment, and particularly relates to an asphalt stratified melting method and a melting machine for glue. Background Art

[0002] The non-curing rubber asphalt is a new type of waterproof coating. It is neither a water-based coating, nor a solvent-based or reactive coating, but a solvent-free and non-film-forming creep-type coating. The non-curing rubber asphalt does not slide, flow, or drip at an environmental temperature of 80°C, does not coagulate or crack at an environmental temperature of -20°C, and when the environmental temperature reaches 180°C, the non-curing rubber asphalt will become a fluid with very good fluidity, which is convenient for construction and shaping. During construction, the non-curing rubber asphalt must be melted and extruded by a special melting device and constructed by scraping or spraying methods. Among them, due to the large area of the sheet-shaped non-curing asphalt, when the material enters the melting tank, it cannot be in good contact with the heat source, resulting in poor heat absorption effect of the asphalt, low melting efficiency, greatly affecting the construction and production efficiency, and consuming a large amount of heat energy during the heating process.

[0003] The patent with the existing publication number CN205308726U discloses a special hot-melting machine for non-curing rubber asphalt waterproof coating, including a material tank. A heat-conducting oil tank is arranged around the outside of the material tank. The heat-conducting oil tank is communicated with a heat-conducting oil inlet arranged at the top of the hot-melting machine. A heating furnace is arranged at the bottom of the heat-conducting oil tank. The heating furnace is communicated with a burner arranged on one side of it. A fuel tank is arranged above the burner to supply fuel to the burner. A control panel is arranged on the side wall of the hot-melting machine close to the fuel tank. An inlet is arranged at the top of the material tank. A stirrer for stirring materials is arranged in the material tank. An outlet is arranged at the bottom of one side of the material tank. The heating efficiency of the sheet-shaped non-curing rubber asphalt processed by this asphalt is low, the stirring efficiency is low, and the energy consumption is high. Summary of the Invention

[0004] One of the purposes of the present invention is to provide an asphalt stratified melting method, which solves the problems of low heating and melting efficiency and uneven heat reception of sheet-shaped non-curing asphalt.

[0005] To achieve the above-mentioned invention purpose, the technical solutions adopted by the present invention are as follows:

[0006] An asphalt stratified melting method includes the following steps:

[0007] S1. Feeding: Feed the sheet-shaped asphalt material into the melting tank from the feed inlet;

[0008] S2. Stirring: The sheet-shaped asphalt material contacts the melted asphalt under the push of the stirring paddle, and continuous stirring makes the sheet-shaped asphalt material and the melted asphalt evenly mixed;

[0009] S3. Stratified heating: The sheet asphalt material is heated and melted by heating elements in the melting area on the upper layer of the melting tank. After melting, the asphalt flows into the strong heating area on the lower layer of the melting tank, and the heating elements in the strong heating area rapidly raise the temperature of the asphalt, uniformly heating the asphalt to the set discharging temperature.

[0010] S4. Discharging: The asphalt is continuously agitated in the strong heating area, extruded by the stirring paddles in the strong heating area, and discharged outward through the discharging valve. While discharging, sheet asphalt material is added to the melting tank for replenishment to keep the total amount of asphalt in the melting tank unchanged.

[0011] S5. Circulation: Repeat steps S1 - S4 to continuously heat and melt the asphalt, ensuring the heating efficiency of the asphalt and the continuity of discharging.

[0012] Preferably, in step S2, it further includes a driving motor, a stirring shaft, a first stirring paddle, a second stirring paddle, and a third stirring paddle. The driving motor drives the first stirring paddle, the second stirring paddle, and the third stirring paddle to rotate through the stirring shaft to stir and agitate the asphalt. The first stirring paddle, the second stirring paddle, and the third stirring paddle can all adjust their height positions in the melting tank to push the asphalt in different areas to move, perform stratified stirring on the asphalt at different temperatures, and improve the uniformity of asphalt mixing.

[0013] Preferably, in step S2, the first stirring paddle includes paddle blades and multiple stirring rods. The multiple stirring rods are arranged on the paddle blades and face the top of the melting tank. The multiple stirring rods apply a pushing force towards the outside of the melting tank and a driving force along the radial direction of the stirring shaft to the asphalt with the stirring shaft as the center, enabling the input sheet asphalt material to fully contact and mix with the flowing asphalt, and accelerating the temperature rise efficiency of the sheet asphalt material.

[0014] Preferably, in step S3, it further includes a first heating element, a second heating element, a third heating element, and a fourth heating element. The first heating element and the second heating element are arranged in the melting area to heat the sheet asphalt entering the melting tank. The third heating element and the fourth heating element are arranged in the strong heating area to rapidly raise the temperature of the melted asphalt, enabling the heating of the asphalt to always be efficient and reducing heating energy consumption.

[0015] Preferably, in step S3, the first heating element includes a spiral part. The spiral part is arranged around the central axis of the melting tank. The spiral part is used to concentrate heat to heat the asphalt near the center of the melting tank, preventing the asphalt from accumulating towards the center and reducing the mixing efficiency of the asphalt.

[0016] Preferably, in step S3, there are also a first hot bed, a second hot bed, and a third hot bed. The first hot bed is connected to the second heating element, the second hot bed is connected to the third heating element, and the third hot bed is connected to the fourth heating element. The first hot bed includes a framework, a plurality of through holes, and a plurality of baffles. The second heating element passes through the framework. The plurality of through holes are provided on the first hot bed, and the baffles are correspondingly arranged on the edges of the through holes. The asphalt heated to the flowing state collides with the baffles and flows downward through the through holes to the lower layer of the melting tank. The baffles divide the asphalt layer by layer to ensure the rate of the asphalt flowing downward and reliable and uniform discharging.

[0017] Preferably, in step S3, the second heating element and the third heating element have the same structure. The second heating element includes a heating part, and the heating part is arranged parallel to the bottom surface of the melting tank. The asphalt is in close contact with the second heating element and the third heating element, and the heating part uniformly heats the asphalt in the horizontal direction to ensure the uniformity of heating the asphalt.

[0018] Preferably, in step S3, the second stirring paddle includes fan blades, and the fan blades are twisted radially around the stirring shaft to push the asphalt to flip and move in the strong heating area. The blades of the third stirring paddle are perpendicular to the stirring shaft to push the asphalt to move horizontally in the strong heating area, and the asphalt is uniformly heated by flipping the asphalt.

[0019] Preferably, in step S4, the opening degree of the discharge valve is adjusted to control the discharge flow rate of the asphalt, so that the total amount of asphalt in the melting tank remains unchanged, and the heating efficiency of the asphalt always remains at a relatively high level.

[0020] The second object of the present invention is to provide a melting machine, which solves the problems of low heating and melting efficiency, high energy consumption, and inconvenient construction and movement of the existing melting machines for sheet-shaped uncured asphalt.

[0021] To achieve the above invention objects, the technical solutions adopted by the present invention are as follows:

[0022] A melting machine for implementing the asphalt stratified melting method includes a housing, a melting tank, a stirring device, and a heating device. The melting tank is arranged inside the housing, the stirring device is arranged above the melting tank, and the heating device is arranged inside the melting tank, which can perform stratified heating on the asphalt, with high heating efficiency and rapid discharging to meet the use requirements of rapid on-site construction.

[0023] The beneficial effects of the present invention are:

[0024] (1) This melting machine method for asphalt adopts the method of adding asphalt in batches. Under the condition that a certain amount of molten asphalt is retained in the melting tank, asphalt is added to the melting area of the melting tank. The molten asphalt is used to conduct heat to the flaky asphalt, increasing the contact area of the flaky asphalt, improving the heat transfer. After the flaky asphalt enters the melting tank, it is stirred by the stirring paddle, so that the flaky asphalt can fully contact the molten asphalt. After the flaky asphalt is heated into a flowing state, the asphalt flows layer by layer to the strong heating area at the lower layer of the melting tank after heating. The temperature of the strong heating area is higher and there are multiple layers of heating elements distributed therein. The multiple layers of heating elements increase the heating temperature layer by layer. The asphalt is quickly raised to the set construction temperature in the strong heating area, and the stirring paddle in the strong heating area applies power to stir it evenly. After stirring evenly, the stirring paddle applies a thrust to extrude the asphalt out of the melting tank.

[0025] (2) The heating element adopted by this asphalt layered melting method is provided with a spiral part, which is used to centrally heat the asphalt near the center of the melting tank, preventing the asphalt from adhering to the stirring shaft to form a stack, reducing the heating and stirring efficiency of the asphalt, and increasing the difficulty of maintaining and cleaning the melting tank.

[0026] (3) In this melting machine layered melting method, heat pipes are used to heat and melt the asphalt, and the heating elements are supported by a hot bed. The hot bed is provided with baffles and through holes for flow splitting. The baffles can block and divert the asphalt approaching the hot bed, guiding the asphalt into the through holes. The asphalt flowing through the through holes is diverted to the lower layer of the melting tank. Utilizing the better fluidity of the lower asphalt, the asphalt is split, improving the efficiency of heating the asphalt.

[0027] (4) This melting machine can heat the asphalt in layers, with high heating efficiency for the asphalt. By heating the asphalt in sub-regions, the utilization rate of thermal energy is improved, and multiple stirring paddles are used to stir the asphalt to make the heating of the asphalt uniform. Brief Description of the Drawings

[0028] Figure 1 It is a flowchart of the asphalt melting method provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the asphalt melting method provided by the present invention;

[0030] Figure 3 It is an exploded view of the melting machine provided by the present invention;

[0031] Figure 4 It is an axonometric view of the melting machine provided by the present invention;

[0032] Figure 5 It is a front view of the melting machine provided by the present invention;

[0033] Figure 6Side view of the melting glue machine provided by the present invention;

[0034] Figure 7 Side view of the melting glue machine provided by the present invention;

[0035] Figure 8 is Figure 5 Cross-sectional view along line A-A;

[0036] Figure 9 is Figure 5 Cross-sectional view along line B-B;

[0037] Figure 10 Combined view of the stirring device and the heating device provided by the present invention;

[0038] Figure 11 Side view of the stirring device and the heating device provided by the present invention;

[0039] Figure 12 Axonometric view of the stirring device provided by the present invention;

[0040] Figure 13 Front view of the stirring device provided by the present invention;

[0041] Figure 14 is Figure 13 Cross-sectional view along line C-C;

[0042] Figure 15 Side view of the heating device provided by the present invention;

[0043] Figure 16 Front view of the heating device provided by the present invention;

[0044] Figure 17 is Figure 16 Cross-sectional view along line D-D.

[0045] Reference numerals:

[0046] 1. Outer shell; 11. Feed inlet; 12. Top cover; 2. Melting tank; 21. Discharge pipe; 22. Heat insulation layer; 3. Stirring device; 31. Driving motor; 32. Stirring shaft; 33. First stirring paddle; 331. Blade; 332. Stirring rod; 333. Collar; 34. Second stirring paddle; 341. Fan blade; 342. Paddle sleeve; 35. Third stirring paddle; 36. Cover plate; 4. Heating device; 41. Electric heater; 42. First heating element; 421. Spiral part; 422. Support part; 423. Heating core; 43. Second heating element; 431. Heating part; 432. Connection part; 44. Third heating element; 45. Fourth heating element; 46. First hot bed; 461. Frame; 462. Through hole; 463. Baffle; 47. Second hot bed; 48. Third hot bed; 5. Control box; 6. Discharge valve; 7. Melting area; 8. Strong heating area. Detailed implementation mode

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0048] Embodiment 1

[0049] As Figures 1-15 shown, the present invention discloses an asphalt layered melting method, including the following steps:

[0050] S1. Feeding: Feed the flaky asphalt material into the melting tank 2 through the feed inlet 11;

[0051] S2. Stirring: The flaky asphalt material contacts the melted asphalt under the push of the stirring paddle, and continuous stirring makes the flaky asphalt material and the melted asphalt evenly mixed;

[0052] S3. Layered heating: The flaky asphalt is heated and melted by the heating element in the melting area 7 on the upper layer of the melting tank 2. After melting, the asphalt flows into the strong heating area 8 on the lower layer of the melting tank 2, and the heating element in the strong heating area 8 quickly raises the temperature of the asphalt, heating the asphalt evenly to the set discharge temperature. Among them, the melting area 7 is used for mixing the flaky asphalt with the flowing asphalt, increasing the heat conduction area through the flowing asphalt, accelerating the heat absorption of the flaky asphalt material, and the temperature of the strong heating area 8 is higher than that of the melting area 7, which is used to quickly increase the temperature of the flowing asphalt after mixing, so as to achieve the purpose of rapid temperature increase;

[0053] S4. Discharging: The asphalt is continuously agitated in the strong heating area 8, extruded by the stirring paddles in the strong heating area 8, discharged outward through the discharge valve 6, and while discharging, flaky asphalt material is added to the melting tank 2 for replenishment to keep the total amount of asphalt in the melting tank 2 unchanged;

[0054] S5. Circulation: Repeat steps S1 - S4 to continuously heat and melt the asphalt.

[0055] Preferably, in step S2, it further includes a driving motor 31, a stirring shaft 32, a first stirring paddle 33, a second stirring paddle 34, and a third stirring paddle 35. The driving motor 31 drives the first stirring paddle 33, the second stirring paddle 34, and the third stirring paddle 35 to rotate through the stirring shaft 32 to stir the asphalt. The first stirring paddle 33, the second stirring paddle 34, and the third stirring paddle 35 can all adjust their height positions in the melting tank 2 to push the asphalt in different areas to move. Among them, the first stirring paddle 33, the second stirring paddle 34, and the third stirring paddle 35 are all connected to the stirring shaft 32. By freely adjusting the height position of the stirring paddle, it is used in cooperation with heating. The first stirring paddle 33 mixes the asphalt entering the melting tank 2 and applies a centrifugal force towards the outside of the melting tank 2, causing the asphalt material to move away from the stirring shaft 32 to prevent the asphalt from adhering to the stirring shaft 32 and forming a pile that hinders the uniform mixing of the asphalt.

[0056] Preferably, in step S2, the first stirring paddle 33 includes a paddle blade 331 and multiple stirring rods 332. The multiple stirring rods 332 are arranged on the paddle blade 331 and face the top of the melting tank 2. The multiple stirring rods 332 apply a driving force towards the outside of the melting tank 2 and a driving force along the radial direction of the stirring shaft 32 to the asphalt with the stirring shaft 32 as the center. The lengths of the multiple stirring rods 332 are different to break up and separate the flaky asphalt material entering the melting tank 2.

[0057] Preferably, in step S3, it further includes a first heating element 42, a second heating element 43, a third heating element 44, and a fourth heating element 45. The first heating element 42 and the second heating element 43 are arranged in the melting area 7 to heat the flaky asphalt entering the melting tank 2. The third heating element 44 and the fourth heating element 45 are arranged in the strong heating area 8 to rapidly increase the temperature of the melted asphalt. The temperatures of the second heating element 43, the third heating element 44, and the fourth heating element 45 gradually increase to improve the heating capacity for the asphalt, and the asphalt heats up quickly.

[0058] Preferably, in step S3, the first heating element 42 includes a spiral part 421. The spiral part 421 is arranged around the central axis of the melting tank 2. The spiral part 421 is used to concentrate heat to heat the asphalt near the center of the melting tank 2, and the spiral part 421 plays a role in protecting the stirring shaft 32 to prevent the asphalt from piling up and hindering the mixing of the asphalt.

[0059] Preferably, in step S3, there are also a first hot bed 46, a second hot bed 47, and a third hot bed 48. The first hot bed 46 is connected to the second heating element 43, the second hot bed 47 is connected to the third heating element 44, and the third hot bed 48 is connected to the fourth heating element 45. The first hot bed 46 includes a framework 461, a plurality of through holes 462, and a plurality of baffles 463. The second heating element 43 passes through the framework 461. The plurality of through holes 462 are provided on the first hot bed 46. The baffles 463 are correspondingly arranged on the edges of the through holes 462. The asphalt heated to the flowing state collides with the baffles 463 and then flows downward to the lower layer of the melting tank 2 through the through holes 462. The baffles 463 divide the asphalt layer by layer. The baffles 463 direct the asphalt with higher temperature and better fluidity to the enhanced heating area 8 in the lower layer of the melting tank 2, improving the layer-by-layer heating efficiency of the asphalt.

[0060] Preferably, in step S3, the second heating element 43 and the third heating element 44 have the same structure. The second heating element 43 includes a heating part 431. The heating part 431 is arranged parallel to the bottom surface of the melting tank 2. The asphalt is in close contact with the second heating element 43 and the third heating element 44. The heating part 431 uniformly heats the asphalt in the horizontal direction. The heating part 431 uniformly heats the flowing asphalt in the plane. The asphalt passes through the heating part 431 and flows downward, with stable heat transfer and high efficiency.

[0061] Preferably, in step S3, the second stirring paddle 34 includes fan blades 341. The fan blades 341 are twisted radially around the stirring shaft 32, pushing the asphalt to flip in the strong heating area 8, making the temperature distribution of the asphalt uniform. The blades of the third stirring paddle 35 are perpendicular to the stirring shaft 32, pushing the asphalt to move horizontally in the strong heating area 8. A downward extrusion force can be applied for discharging materials, while keeping the asphalt in a flowing state to prevent heat accumulation and local overheating.

[0062] Preferably, in step S4, the opening degree of the discharge valve 6 is adjusted to control the discharge flow rate of the asphalt, so that the total amount of asphalt in the melting tank 2 remains unchanged. The asphalt can be discharged at any time through the discharge valve 6. Moving for discharging makes the construction more convenient. The heated asphalt is directly discharged onto the working surface, and the asphalt can maintain good fluidity, improving the aesthetics of the working surface and reducing the construction difficulty.

[0063] Embodiment 2

[0064] See Figures 3-17, the present invention also discloses a melting machine, which can be used to implement the asphalt stratified melting method, including a housing 1, a melting cylinder 2, a stirring device 3 and a heating device 4. The melting cylinder 2 is arranged inside the housing 1, the stirring device 3 is arranged above the melting cylinder 2, and the heating device 4 is arranged inside the melting cylinder 2. The melting cylinder 2 is arranged inside the housing 1, the stirring device 3 is arranged above the melting cylinder 2, and the heating device 4 is arranged inside the melting cylinder 2. The heating device 4 includes a first heating element 42, a second heating element 43, a third heating element 44 and a fourth heating element 45. The first heating element 42, the second heating element 43, the third heating element 44 and the fourth heating element 45 are distributed layer by layer in the height direction. The first heating element 42 includes a spiral part 421 and a support part 422. The spiral part 421 is arranged around the stirring device 3. One end of the support part 422 is connected to the spiral part 421, and the other end is led out of the melting cylinder 2 along the side wall of the melting cylinder 2. Inside the melting cylinder 2, the second heating element 43, the third heating element 44 and the fourth heating element 45 divide it into upper and lower two-layer heating areas, namely the melting area and the strong heating area. The heating temperatures of the second heating element 43, the third heating element 44 and the fourth heating element 45 increase layer by layer. In the upper heating area, after the sheet material is put in, it can fully contact with the flowing asphalt material and quickly heat up, and quickly melt into a flowing state under the agitation of the stirring paddle. In the lower heating area, the downward flowing asphalt is heated to reach the set use temperature, and then is released from the discharge valve 6 at the lower end for construction use. By the two-layer heating area, the sheet asphalt is fragmented and heated, improving the melting efficiency of the asphalt.

[0065] Preferably, the heating device 4 further includes a first hot bed 46, a second hot bed 47 and a third hot bed 48. The first hot bed 46 is connected to the second heating element 43, the second hot bed 47 is connected to the third heating element 44, and the third hot bed 48 is connected to the fourth heating element 45. The structures of the first hot bed 46, the second hot bed 47 and the third hot bed 48 are the same. The first hot bed 46 includes a skeleton 461, a plurality of through holes 462 and a plurality of baffles 463. The second heating element 43 passes through the skeleton 461, and the skeleton 461 plays a role in supporting the second heating element 43 to prevent the second heating element 43 from deforming under the pressure of the asphalt. A plurality of through holes 462 are arranged on the first hot bed 46, and the baffles 463 are correspondingly arranged on the edges of the through holes 462. The baffles 463 are perpendicular to the first hot bed 46. The baffles 463 are used to block part of the asphalt flow and guide it downward through the through holes 462 and gradually flow downward. The baffles 463 are arranged close to the through holes 462, allowing the highly fluid asphalt to move downward and increasing the temperature layer by layer, which plays a role in improving the asphalt heating efficiency.

[0066] Preferably, the heating device 4 further includes an electric heater 41 and a control box 5. The first heating element 42, the second heating element 43, the third heating element 44, and the fourth heating element 45 are all connected to the electric heater 41. The electric heater 41 is arranged on the top of the melting tank 2, which has a fast heating rate and high heating efficiency. The control box 5 is arranged on the inner side wall of the outer shell 1 and is used to control the stirring speed and the distribution of the heating temperature.

[0067] Preferably, the stirring device 3 includes a driving motor 31, a stirring shaft 32, a first stirring paddle 33, a second stirring paddle 34, and a third stirring paddle 35. The driving motor 31 is arranged on the top of the melting tank 2. The stirring shaft 32 is connected to the driving motor 31. The first stirring paddle 33 and the stirring shaft 32 extend into the melting tank 2. The second stirring paddle 34 and the third stirring paddle 35 are detachably connected to the stirring shaft 32. The first stirring paddle 33 is arranged above the second heating element 43. The second stirring paddle 34 is arranged between the second heating element 43 and the third heating element 44. The third stirring paddle 35 is arranged between the third heating element 44 and the fourth heating element 45. The driving motor 31 is a reduction motor. Stirring paddles are arranged on each layer of heating elements to homogenize the asphalt and improve the fluidity of the asphalt.

[0068] Preferably, a cover plate 36 is also sleeved on the stirring shaft 32. The cover plate 36 is above the first heating element 42. The cover plate 36 covers the upper end of the spiral part 421 along the direction of the stirring shaft 32, so that the flaky asphalt will not directly enter the spiral part 421 and then adhere to the stirring shaft 32.

[0069] Preferably, the first stirring paddle 33 includes a paddle blade 331, a plurality of stirring rods 332, and a collar 333. The paddle blade 331 is arranged on the side wall of the collar 333. The collar 333 is sleeved on the stirring shaft 32. The height position of the paddle blade 331 can be adjusted through the collar 333 to ensure smooth stirring of the paddle blade 331 in the heating area. A plurality of stirring rods 332 are arranged on the paddle blade 331 and face the top of the melting tank 2. The plurality of stirring rods 332 expand towards the side wall of the melting tank 2 with the stirring shaft 32 as the center, and can push the flaky asphalt towards the inner wall of the melting tank 2 to prevent the asphalt from adhering to the stirring shaft 32.

[0070] Preferably, the first heating element 42, the second heating element 43, and the third heating element 44 are made by bending electric heating tubes. The first heating element 42 further includes a heating core 423. The heating core 423 is nested in the first heating element 42. The heat generated by the heating core 423 diffuses into the asphalt through the heating element, realizing large-area and uniform heating of the asphalt, ensuring the uniformity of asphalt heating, and avoiding asphalt agglomeration.

[0071] Preferably, the second heating element 43 and the third heating element 44 have the same structure. The second heating element 43 includes a heating part 431 and a connecting part 432. The heating part 431 is arranged parallel to the bottom surface of the melting tank 2. One end of the connecting part 432 is connected to the heating part 431, and the other end extends upward along the side wall of the melting tank 2 to the top end of the melting tank 2. The connecting part 432 is also located inside the melting tank 2, making full use of the heat on the heating element. The second heating element 43 is arranged in a continuous U shape. By adjusting the density of the distribution of the heating part 431, the heat generation per unit area can be adjusted, and the asphalt can be heated according to the actual heating capacity.

[0072] Preferably, the second stirring paddle 34 and the third stirring paddle 35 have the same structure. When viewed from the direction of the stirring shaft 32, the second stirring paddle 34 and the third stirring paddle 35 are staggered. The second stirring paddle 34 includes a fan blade 341 and a paddle sleeve 342. The fan blade 341 is twisted around the radial direction of the stirring shaft 32. The fan blade 341 is relatively fixed on the outer side wall of the paddle sleeve 342. The paddle sleeve 342 is sleeved on the stirring shaft 32. The blade of the third stirring paddle 35 is perpendicular to the stirring shaft 32. The rotation of the second stirring paddle 34 is used to accelerate the downward flow of the asphalt, and the rotation of the third stirring paddle 35 is used to push the asphalt to flow in a plane. By the rotational cooperation of different stirring paddles, the flow state of the asphalt in different regions can be adjusted, improving the melting efficiency of the asphalt. The positions of the second stirring paddle 34 and the third stirring paddle 35 on the stirring shaft 32 can be adjusted through the paddle sleeve 342, and the spatial size of the heating area can be divided to ensure the heating uniformity of the asphalt.

[0073] Preferably, the melting tank 2 further includes a heat insulation layer 22. The heat insulation layer 22 is attached to the outer side wall of the melting tank 2. The heat insulation layer 22 is made of glass fiber cotton, which has the functions of fire prevention, heat insulation, sound absorption and noise reduction. Cooperating with the top cover 12 that closes the melting tank 2, it plays a role in preventing the heat in the melting tank 2 from leaking out, reducing energy consumption and the noise generated by stirring.

[0074] Preferably, the outer shell 1 is also provided with a feed inlet 11, a discharge pipe 21 and a discharge valve 6. There are two feed inlets 11. The feed inlets 11 are arranged at the top of the outer shell 1. One end of the feed inlet 11 facing outward is open, and the other end extends into the melting tank 2, showing a funnel shape, which can adapt to simultaneous feeding from the left and right sides of the construction site, shortening the feeding time. The discharge valve 6 is arranged at the bottom of the melting tank 2. One end of the discharge valve 6 extends to the outside of the outer shell 1, which is used to control the flow rate of the discharged asphalt. After the asphalt in the melting tank 2 is heated, it can be directly discharged to the outside. The discharge pipe 21 is connected to the melting tank 2 and is used to discharge the asphalt to the outside.

[0075] Preferably, the bottom of the melting machine is also provided with casters, which facilitate the movement of the melting machine in the construction site and are convenient for use and maintenance.

[0076] The detailed working process of this melting machine is as follows:

[0077] Move the melting machine to the construction site, start the heating device 4 and the stirring device 3, and combine the flaky asphalt materials into the melting tank 2 through the two feeding ports 11. The asphalt materials enter the melting zone, and the first heating element 42 and the second heating element 43 are used to preliminarily heat and melt the flaky asphalt materials. At the same time, the first stirring paddle 33 stirs and vulcanizes the flaky asphalt. After the flaky asphalt is heated to a flowing state, it flows downward to the lower heating area through the through hole 462 on the first hot bed 46, and is intensively heated by the third heating element 44 and the fourth heating element 45 to improve the fluidity of the asphalt. At the same time, the second stirring paddle 34 and the third stirring paddle 35 stir the flowing asphalt to make the asphalt heated evenly. After the asphalt is heated to the discharging temperature, continuous stirring is carried out, and continuous feeding is carried out into the melting tank 2. The newly added asphalt is heated evenly by the fluidized asphalt. After the asphalt is heated to the discharging temperature, it is discharged outward through the discharging pipe 21. The opening degree of the discharging valve 6 is adjusted to control the flow rate of the discharged asphalt, so that the amount of the input flaky asphalt is the same as the amount of the asphalt released by heating, and it is ensured that there is always a certain amount of flowing asphalt in the melting tank 2.

[0078] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. An asphalt stratified melting method, characterized in that, It includes the following steps: S1. Feeding: Feed the sheet asphalt material into the melting tank (2) from the feed inlet (11). S2. Stirring: The sheet asphalt material contacts the molten asphalt under the push of the stirring paddle, and continuous stirring makes the sheet asphalt material and the molten asphalt evenly mixed. S3. Layered heating: The sheet asphalt material is heated and melted by the heating element in the melting area (7) on the upper layer of the melting tank (2). After melting, the asphalt flows into the strong heating area (8) on the lower layer of the melting tank (2), and the heating element in the strong heating area (8) rapidly raises the temperature of the asphalt, and evenly heats the asphalt to the set discharge temperature. S4. Discharging: The asphalt is continuously agitated in the strong heating area (8), extruded by the stirring paddle in the strong heating area (8), discharged outward through the discharge valve (6), and while discharging, add sheet asphalt material into the melting tank (2) for replenishment to keep the total amount of asphalt in the melting tank (2) unchanged. S5. Circulation: Repeat steps S1 - S4 to continuously heat and melt the asphalt. In step S2, it further includes a driving motor (31), a stirring shaft (32), a first stirring paddle (33), a second stirring paddle (34) and a third stirring paddle (35). The driving motor (31) drives the first stirring paddle (33), the second stirring paddle (34) and the third stirring paddle (35) to rotate through the stirring shaft (32) to stir and agitate the asphalt. The first stirring paddle (33), the second stirring paddle (34) and the third stirring paddle (35) can all adjust their height positions in the melting tank (2) to push the asphalt in different areas to move. In step S3, it further includes a first heating element (42), a second heating element (43), a third heating element (44) and a fourth heating element (45). The first heating element (42) and the second heating element (43) are arranged in the melting area (7) to heat the sheet asphalt entering the melting tank (2). The third heating element (44) and the fourth heating element (45) are arranged in the strong heating area (8) to rapidly raise the temperature of the molten asphalt. In step S3, it further includes a first hot bed (46), a second hot bed (47) and a third hot bed (48). The first hot bed (46) is connected to the second heating element (43), the second hot bed (47) is connected to the third heating element (44), and the third hot bed (48) is connected to the fourth heating element (45). The first hot bed (46) includes a framework (461), a plurality of through holes (462) and a plurality of baffles (463). The second heating element (43) passes through the framework (461). A plurality of the through holes (462) are arranged on the first hot bed (46), and the baffles (463) are correspondingly arranged on the edges of the through holes (462). The asphalt heated to the flowing state collides with the baffles (463) and then flows through the through holes (462) to the lower layer of the melting tank (2), and the baffles (463) divide the asphalt layer by layer.

2. The asphalt stratified melting method according to claim 1, characterized in that: In step S2, the first stirring paddle (33) includes paddle blades (331) and a plurality of stirring rods (332). The plurality of stirring rods (332) are arranged on the paddle blades (331) and face the top of the melting tank (2). The plurality of stirring rods (332) apply a driving force towards the outside of the melting tank (2) and a driving force in the radial direction of the stirring shaft (32) to the asphalt with the stirring shaft (32) as the center.

3. The asphalt stratified melting method according to claim 1, characterized in that: In step S3, the first heating element (42) includes a spiral portion (421). The spiral portion (421) is arranged around the central axis of the melting tank (2). The spiral portion (421) is used to concentrate heat to heat the asphalt near the center of the melting tank (2).

4. The asphalt stratified melting method according to claim 1, characterized in that: In step S3, the second heating element (43) and the third heating element (44) have the same structure. The second heating element (43) includes a heating portion (431). The heating portion (431) is arranged parallel to the bottom surface of the melting tank (2). The asphalt is in close contact with the second heating element (43) and the third heating element (44). The heating portion (431) uniformly heats the asphalt in the horizontal direction.

5. The asphalt stratified melting method according to claim 4, characterized in that: In step S3, the second stirring paddle (34) includes fan blades (341). The fan blades (341) are twisted in the radial direction of the stirring shaft (32) to push the asphalt to perform a flipping motion in the strong heating area (8). The blades of the third stirring paddle (35) are perpendicular to the stirring shaft (32) to push the asphalt to move horizontally in the strong heating area (8).

6. The asphalt stratified melting method according to claim 1, characterized in that: In step S4, adjust the opening degree of the discharge valve (6) to control the discharge flow rate of the asphalt so that the total amount of asphalt in the melting tank (2) remains unchanged.

7. A melting glue machine, characterized in that: An asphalt stratified melting method capable of implementing any one of claims 1-6, including a housing (1), a melting tank (2), a stirring device (3) and a heating device (4). The melting tank (2) is arranged inside the housing (1). The stirring device (3) is arranged above the melting tank (2). The heating device (4) is arranged inside the melting tank (2).

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