An easy-to-clean asphalt mixing plant

Abstract

This utility model discloses an easy-to-clean asphalt mixing plant, including an outer shell, a heated inner liner on the top wall of the outer shell, a main shaft rotatably connected to the top wall of the outer shell, a feed pipe on the upper side wall of the outer shell, and a mixing component. The mixing component includes mounting shafts, insertion slots, and mixing blades. The outer arc surface of the main shaft has evenly distributed mounting shafts, and each mounting shaft has an insertion slot at the end away from the center of the main shaft. The shafts of the mixing blades are inserted into the interior of adjacent insertion slots. The outer arc surface of each mounting shaft has a fixed protective shell, and a movable protective shell is hinged to the upper plane of each fixed protective shell. The inner arc surfaces of both the fixed and movable protective shells have symmetrically distributed sealing semi-rings. This easy-to-clean asphalt mixing plant features detachable mixing blades, allowing for individual cleaning of the mixing blades, reducing cleaning difficulty and improving the cleaning efficiency of the asphalt mixing equipment.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, specifically to an asphalt mixing machine that is easy to clean. Background Technology

[0002] In the field of road construction, asphalt pavement has become one of the most widely used pavement types due to its advantages such as good driving comfort, skid resistance and ease of construction. With the continuous advancement of transportation infrastructure construction, the demand for asphalt mixtures is constantly increasing, whether for new road construction projects or the maintenance and repair of existing roads. As a key piece of equipment for producing asphalt mixtures, the performance of asphalt mixing plants directly affects the quality and construction efficiency of asphalt pavement, which in turn affects the service life of roads and driving safety. Against this backdrop of industry development, the technological improvement and innovation of asphalt mixing plants has always been an important research direction in the field of road engineering.

[0003] Currently, common asphalt mixing plants mainly consist of a mixing device, a heating system, a feeding system, and a control system. During operation, the feeding system first delivers raw materials such as aggregates, asphalt, and mineral powder of different specifications to the mixing device according to a preset ratio. Then, the heating system heats the raw materials to improve the fluidity of the asphalt, facilitating uniform mixing. Subsequently, the mixing device starts, relying on the rotation of the mixing blades to mix the various raw materials, ensuring thorough mixing to form a suitable asphalt mixture. Finally, the mixed asphalt mixture is discharged through the unloading device and transported to the construction site for road paving. After the asphalt mixing operation is completed, the remaining material in the mixing plant is emptied. Then, the operator usually injects a certain amount of hot water or special cleaning fluid into the mixing plant and starts the mixing device to run at low speed for a period of time, attempting to loosen some residual asphalt through the flushing of the liquid and the movement of the mixing blades. At this time, the operator often needs to use tools such as shovels and wire brushes to manually scrape and scrub the inside of the equipment. After cleaning, the wastewater generated during cleaning is discharged, and it is checked whether there is still residual asphalt that has not been cleaned. If so, the cleaning operation is repeated.

[0004] However, existing asphalt mixing plants have significant inconveniences in terms of cleaning. On the one hand, the mixing blades are usually fixed to the mixing shaft and cannot be disassembled or the disassembly process is extremely complicated. This makes it difficult to thoroughly and meticulously clean the mixing blades during cleaning. Due to the high viscosity of asphalt, it will adhere tightly to the surface of the mixing blades, and ordinary rinsing methods cannot effectively remove it. The non-removable structure makes it impossible to remove the mixing blades separately for deep cleaning. Cleaning operations can only be carried out in the limited space inside the mixing plant. Asphalt in many dead corners and crevices is difficult to remove. Over time, this not only affects the mixing effect of the mixing blades, but also causes new material to be mixed into the asphalt during the next mixing, affecting product quality. Therefore, we propose an asphalt mixing plant that is easy to clean. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide an asphalt mixing plant that is easy to clean, reducing the difficulty of cleaning and improving the cleaning efficiency of asphalt mixing equipment, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an easy-to-clean asphalt mixing plant, comprising an outer shell, a heated inner liner on the top wall of the outer shell, a main shaft rotatably connected to the top wall of the outer shell, a feed pipe on the upper side wall of the outer shell, and a mixing component;

[0007] The mixing assembly includes mounting shafts, insertion slots, and mixing blades. The outer arc surface of the main shaft is provided with evenly distributed mounting shafts, and each mounting shaft has an insertion slot at the end away from the center of the main shaft. The shafts of the mixing blades are inserted into the interior of adjacent insertion slots. The outer arc surface of each mounting shaft is provided with a fixed protective shell, and a movable protective shell is hinged to the upper plane of each fixed protective shell. The inner arc surfaces of both the fixed and movable protective shells are provided with symmetrically distributed sealing semi-rings. The inner arc surfaces of the sealing semi-rings are in contact with the outer arc surfaces of adjacent mounting shafts. The detachable installation method of the mixing blades allows for individual cleaning of the mixing blades, reducing cleaning difficulty and improving the cleaning efficiency of the asphalt mixing equipment.

[0008] Furthermore, a control switch assembly is provided on the front side of the housing, and the input end of the control switch assembly is electrically connected to an external power source for stable control.

[0009] Furthermore, the mixing assembly also includes upright plates, sliding columns, sliders, plug rods, insert plates, and slots. Upright plates are provided at both the upper and lower ends of the plane in the middle of the mounting shaft. Sliding columns are provided between two adjacent upright plates. Sliding columns are slidably connected to the outer arc surfaces of the sliding columns. Plug rods are provided on the end faces of the sliders away from the center of the main shaft. Insert plates are provided on the opposite outer surfaces of two adjacent plug rods. The inner wall of the plug slots near the center of the main shaft has clearance holes. The end of the plug rod away from the center of the main shaft passes through the radially adjacent clearance holes. Each plug slot has two symmetrical insert plates. Slots are provided at the center of the main shaft and on both the upper and lower sides of the shaft of the mixing blade. The insert plates are inserted into the adjacent slots to facilitate quick assembly and disassembly of the mixing blades.

[0010] Furthermore, a bidirectional lead screw is rotatably connected between two adjacent vertical plates. The threaded ends of the bidirectional lead screw are threaded to the middle of the adjacent sliders. The upper end of the bidirectional lead screw is provided with a rotating shaft, and the upper end of the rotating shaft is provided with a limiting plate. The middle of the limiting plate is threaded with a bolt, and the bolt is threaded to the middle plane of the adjacent mounting shaft to adjust the slider to move up and down.

[0011] Furthermore, a motor is mounted on the upper end of the housing via a mounting bracket. The output shaft of the motor passes through the middle of the mounting bracket and is fixedly connected to the center of the upper end face of the main shaft. The input end of the motor is electrically connected to the output end of the control switch group for stable driving.

[0012] Furthermore, heating wires are provided at both the upper and lower ends of the outer arc surface of the heating inner liner, and the input ends of the heating wires are electrically connected to the output ends of the control switch group to facilitate heating.

[0013] Furthermore, the lower end of the heating inner liner is provided with a discharge pipe, which is exposed outside the outer shell. A valve is connected in series in the middle of the discharge pipe, and the input end of the valve is electrically connected to the output end of the control switch group for unloading.

[0014] Furthermore, the front wall of the outer shell is hinged to an outer shell door, and the front wall of the heated inner liner is hinged to an inner liner door, which facilitates cleaning.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This easy-to-clean asphalt mixing plant has the following advantages:

[0016] The mixing blades and the mounting shaft are connected by a detachable method using a combination of insertion slots, slots, and insert plates. By rotating the two-way screw, the insert plate can be easily disengaged from the slot, allowing the mixing blades to be quickly removed for individual cleaning. After opening the inner tank door, the heated inner tank can be directly rinsed, greatly reducing the difficulty of cleaning and improving the cleaning efficiency of the asphalt mixing equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial cross-sectional structural diagram of the outer shell of this utility model;

[0019] Figure 3 This is a partial cross-sectional structural diagram of the heating inner liner of this utility model;

[0020] Figure 4 This is a schematic diagram of the front plane of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the hybrid component of this utility model experiencing a partial explosion.

[0022] Figure 6 for Figure 5 A magnified structural diagram of part A in the diagram.

[0023] In the diagram: 1. Outer shell, 2. Mixing assembly, 21. Mounting shaft, 22. Insertion slot, 23. Vertical plate, 24. Sliding column, 25. Sliding block, 26. Insertion rod, 27. Insertion plate, 28. Slot, 29. Mixing blade, 3. Main shaft, 4. Heating inner liner, 5. Heating wire, 6. Valve, 7. Inner liner door, 8. Outer shell door, 9. Motor, 10. Bidirectional lead screw, 11. Limiting plate, 12. Bolt, 13. Fixed protective shell, 14. Moving protective shell, 15. Sealing half ring, 16. Feed pipe, 17. Control switch group. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6This embodiment provides a technical solution: an easy-to-clean asphalt mixing plant, including a shell 1. A control switch group 17 is provided on the front side of the shell 1. The input end of the control switch group 17 is electrically connected to an external power source. A heating inner liner 4 is provided on the top wall of the shell 1. Heating wires 5 are provided at both the upper and lower ends of the outer arc surface of the heating inner liner 4. The input ends of the heating wires 5 are electrically connected to the output ends of the control switch group 17. A discharge pipe is provided at the lower end of the heating inner liner 4, protruding from the shell 1. A valve 6 is connected in series in the middle of the discharge pipe. The input end of the valve 6 is electrically connected to the output end of the control switch group 17. A shell door 8 is hinged to the front side wall of the shell 1, and an inner liner door 7 is hinged to the front side wall of the heating inner liner 4 (both the edges of the shell door 8 and the inner liner door 7 are provided with sealing strips, and the edge between the shell door 8 and the shell 1 is sealed). Door locks are provided at the edge of the outer shell 1 and at the edge between the inner tank door 7 and the heated inner tank 4 (the door locks are the door switch lock structures commonly used in the prior art). The top wall of the outer shell 1 is rotatably connected to the main shaft 3. The upper end of the outer shell 1 is equipped with a motor 9 through a mounting bracket. The output shaft of the motor 9 passes through the middle of the mounting bracket and is fixedly connected to the center of the upper end face of the main shaft 3. The input end of the motor 9 is electrically connected to the output end of the control switch group 17. The upper side wall of the outer shell 1 is provided with a feed pipe 16. An external power supply is connected to the control switch group 17. The heating wire 5 is energized and heated through the control switch group 17 to preheat the heated inner tank 4 so that the heated inner tank 4 reaches a temperature suitable for asphalt mixing. At the same time, it is checked whether the outer shell door 8 and the inner tank door 7 are closed and locked to ensure that the equipment is in a sealed state. It is used to hold asphalt and also includes a mixing component 2.

[0026] Hybrid assembly 2: It includes mounting shafts 21, insertion slots 22, and hybrid blades 29. The outer arc surface of the main shaft 3 is provided with evenly distributed mounting shafts 21. Insertion slots 22 are provided at the ends of the mounting shafts 21 furthest from the center of the main shaft 3. The shafts of the hybrid blades 29 are inserted into the interior of adjacent insertion slots 22 (the outer arc surface of the shaft of the hybrid blade 29, where a portion is inserted into the insertion slot 22, is provided with a sealing groove, and a rubber sealing ring is embedded inside each sealing groove. The outer arc surface of the rubber sealing ring is tightly fitted with the inner arc surface of the adjacent insertion slot 22 to ensure its sealing performance). The outer arc surface of the mounting shafts 21 is provided with a fixed protective shell 13. A movable protective shell 14 is hinged to the upper plane of the fixed protective shell 13 (the fixed protective shell 13 and the movable protective shell 14 are elastic stainless steel tubular clamp structures, and the fixed protective shell 13 and...). Each of the two outer arc surfaces of the moving housing 14 is provided with a connecting plate, and each connecting plate has a connecting hole at its lower end. Workers insert hexagonal bolts into the two adjacent connecting holes between the lower sides of the fixed housing 13 and the moving housing 14, and then screw on nuts to securely connect the fixed housing 13 and the moving housing 14. Both the fixed housing 13 and the moving housing 14 have symmetrically distributed sealing semi-rings 15 on their inner arc surfaces. The inner arc surfaces of the sealing semi-rings 15 are in contact with the outer arc surfaces of adjacent mounting shafts 21. The mixing assembly 2 also includes a vertical plate 23, a sliding column 24, a slider 25, a plug rod 26, a plug plate 27, and a slot 28. Vertical plates 23 are provided at both the upper and lower ends of the plane in the middle of the mounting shaft 21. A sliding column 24 is provided between two adjacent vertical plates 23. The outer arc surfaces of the sliding columns 24 are slidably connected with symmetrically distributed... The slider 25 has a connecting rod 26 on its end face away from the center of the main shaft 3. Two adjacent connecting rods 26 have insert plates 27 on their opposite outer sides. The inner wall of the connecting groove 22 near the center of the main shaft 3 has clearance holes. The ends of the connecting rods 26 away from the center of the main shaft 3 pass through radially adjacent clearance holes. Each connecting groove 22 has two symmetrically arranged insert plates 27. The end of the mounting shaft 21 at the center of the main shaft 3 has slots 28 on both the upper and lower sides of the shaft of the mixing blade 29. The insert plates 27 are inserted into the adjacent slots 28. A bidirectional lead screw 10 is rotatably connected between two adjacent vertical plates 23. The threaded ends of the bidirectional lead screw 10 are threaded to the middle of the adjacent sliders 25. Each rod 10 has a rotating shaft at its upper end, and each rotating shaft has a limiting plate 11 at its upper end. A bolt 12 is threadedly connected to the middle of each limiting plate 11. The bolt 12 is threadedly connected to the middle plane of the adjacent mounting shaft 21. When the control switch group 17 is turned on, the motor 9 is started. The motor 9 drives the main shaft 3 to rotate slowly, adding asphalt, aggregates, and other raw materials to the heating inner liner 4 in a certain proportion through the feed pipe 16. Rotating the bidirectional lead screw 10 causes the threaded ends on both sides of the bidirectional lead screw 10 to move the slider 25 on the sliding column 24. The slider 25 moves the insertion rod 26 and the insertion plate 27, further adjusting the insertion depth of the insertion plate 27 and the slot 28. The connection is achieved through the cooperation of the insertion groove 22, the slot 28, and the insertion plate 27, allowing the mixing blade 29 to be installed with the mounting shaft 21.Subsequently, the control switch group 17 is activated, and the motor 9 continuously drives the main shaft 3 to rotate at high speed. The main shaft 3 drives the mounting shaft 21 to rotate synchronously. During the rotation, the mixing blades 29 on the mounting shaft 21 stir and mix the raw materials in the heating inner tank 4. During this process, the sealing semi-rings 15 on the fixed protective shell 13 and the moving protective shell 14 contact the outer arc surface of the mounting shaft 21, which can effectively prevent materials such as asphalt from entering and contacting the internal mounting components. After the asphalt mixture is mixed, the motor 9 is turned off by the control switch group 17 to stop stirring. Then, the valve 6 is opened, and the asphalt mixture in the heating inner tank 4 is discharged through the discharge pipe. The outer shell door 8 and the inner tank door 7 are then opened. Turn off heating wire 5. For components such as mixing blade 29, open the locking mechanisms on the fixed protective shell 13 and the moving protective shell 14, open the moving protective shell 14, unscrew bolt 12, and rotate the double-acting screw 10 to disengage the insert plate 27 from the slot 28. The mixing blade 29 can then be removed from the insertion slot 22 for individual cleaning. The interior of the heating inner tank 4 can be rinsed with clean water or cleaning fluid. Since the inner tank door 7 is open, cleaning is more convenient and less likely to leave cleaning fluid residue. After cleaning, reinstall all components in their original positions, close the outer shell door 8 and the inner tank door 7, and prepare for the next mixing operation. Mix the asphalt; after mixing, cleaning is easier.

[0027] The working principle of the easy-to-clean asphalt mixing plant provided by this utility model is as follows: An external power supply is connected to the control switch group 17, which powers the heating wire 5 to preheat the inner heating chamber 4, bringing it to a suitable temperature for asphalt mixing. Simultaneously, the outer casing door 8 and the inner chamber door 7 are checked to ensure the equipment is sealed. The control switch group 17 is then turned on, starting the motor 9. The motor 9 drives the main shaft 3 to rotate slowly, and asphalt, aggregates, and other raw materials are added in a certain proportion through the feed pipe 16. In the heating inner liner 4, the double-acting screw 10 is rotated. The threaded ends on both sides of the double-acting screw 10 drive the slider 25 to move on the slide column 24. The slider 25 drives the insertion rod 26 and the insertion plate 27 to move, further adjusting the insertion depth of the insertion plate 27 and the slot 28. The connection is achieved through the cooperation of the insertion groove 22, the slot 28 and the insertion plate 27, installing the mixing blade 29 onto the mounting shaft 21. Then, the control switch group 17 is operated, and the motor 9 continuously drives the main shaft 3 to rotate at high speed. The main shaft 3 drives the mounting shaft 21 to rotate synchronously, and the mixing blade on the mounting shaft 21... During rotation, blade 29 stirs and mixes the raw materials inside the heated inner tank 4. During this process, the sealing semi-rings 15 on the fixed protective shell 13 and the moving protective shell 14 contact the outer arc surface of the mounting shaft 21, effectively preventing materials such as asphalt from entering and contacting the internal mounting components. Once the asphalt mixture is mixed, the motor 9 is turned off via the control switch group 17 to stop stirring. Then, valve 6 is opened, and the asphalt mixture inside the heated inner tank 4 is discharged through the discharge pipe. The outer shell door 8 and the inner tank door 7 are opened, and the heating wire 5 is turned off. For the mixing blade 29, etc... To clean the components, open the locking mechanisms on the fixed housing 13 and the movable housing 14, open the movable housing 14, unscrew the bolt 12, and rotate the double-acting screw 10 to disengage the insert plate 27 from the slot 28. Then, remove the mixing blade 29 from the insertion slot 22 and clean it separately. For the interior of the heating inner tank 4, use clean water or cleaning solution to rinse it. Since the inner tank door 7 is open, cleaning is more convenient and less likely to leave cleaning solution residue. After cleaning, reinstall all components in their original positions, close the outer shell door 8 and the inner tank door 7, and prepare for the next mixing operation.

[0028] It is worth noting that the heating wire 5 disclosed in the above embodiments can be a conventional heating wire, the valve 6 can be an electric butterfly valve, the motor 9 is a YE3 series three-phase asynchronous motor, and the control switch group is equipped with control buttons that correspond one-to-one with the valve 6, the motor 9 and the heating wire 5 and are used to control their switching.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An asphalt mixer that is convenient for cleaning, comprising a housing (1), a heating inner tank (4) is provided on the top wall of the housing (1), a main shaft (3) is rotatably connected to the top wall of the housing (1), and a feed pipe (16) is provided on the upper side wall of the housing (1), and it is characterized in that: It also includes a mixing component (2); Mixing component (2): It includes a mounting shaft (21), a plug-in slot (22) and mixing blades (29). The outer arc surface of the main shaft (3) is provided with evenly distributed mounting shafts (21). One end of each mounting shaft (21) away from the center of the main shaft (3) is provided with a plug-in slot (22). The shaft bodies of the mixing blades (29) are all plugged into the interior of adjacent plug-in slots (22). The outer arc surfaces of the mounting shafts (21) are all provided with fixed protective shells (13). The upper side planes of the fixed protective shells (13) are all hinged with movable protective shells (14). The inner arc surfaces of the fixed protective shells (13) and the movable protective shells (14) are both provided with symmetrically distributed sealing half-rings (15). The inner arc surfaces of the sealing half-rings (15) are all in contact with the outer arc surface of the adjacent mounting shaft (21).

2. The asphalt mixer that is easy to clean according to claim 1, wherein: The front side of the outer shell (1) is provided with a control switch group (17). The input end of the control switch group (17) is electrically connected to an external power supply.

3. The asphalt mixer that is easy to clean according to claim 1, wherein: The mixing component (2) also includes vertical plates (23), sliding columns (24), sliders (25), plugging rods (26), plugging plates (27) and plugging slots (28). The upper and lower ends of the plane in the middle of the mounting shaft (21) are both provided with vertical plates (23). Sliding columns (24) are provided between two adjacent upper and lower vertical plates (23). Symmetrically distributed sliders (25) are all slidably connected to the outer arc surfaces of the sliding columns (24). One end face of each slider (25) away from the center of the main shaft (3) is provided with a plugging rod (26). Plugging plates (27) are provided on the outer sides away from each other of two adjacent upper and lower plugging rods (26). Avoidance holes are opened in the inner walls on one side of each plug-in slot (22) close to the center of the main shaft (3). One end of each plugging rod (26) away from the center of the main shaft (3) passes through the radially adjacent avoidance holes. There are two upper and lower symmetrically distributed plugging plates (27) inside each plug-in slot (22). Plugging slots (28) are opened on the upper and lower sides of the shaft body of the mixing blade (29) at one end of the mounting shaft (21) and the main shaft (3) close to the center. The plugging plates (27) are all plugged into the adjacent upper and lower plugging slots (28).

4. The asphalt mixer that is easy to clean according to claim 3, wherein: A bidirectional screw rod (10) is rotatably connected between two adjacent upper and lower vertical plates (23). The upper and lower threaded ends of the bidirectional screw rod (10) are both threadedly connected to the middle parts of the adjacent upper and lower sliders (25). The upper ends of the bidirectional screw rod (10) are all provided with rotating shafts. Limit pieces (11) are provided at the upper ends of the rotating shafts. Bolts (12) are all threadedly connected to the middle parts of the limit pieces (11). The bolts (12) are all threadedly connected to the middle plane of the adjacent mounting shaft (21).

5. The asphalt mixer convenient for cleaning according to claim 2, wherein: A motor (9) is installed at the upper end of the outer shell (1) through a mounting frame. The output shaft of the motor (9) penetrates through the middle of the mounting frame and is fixedly connected to the center of the upper end face of the main shaft (3). The input end of the motor (9) is electrically connected to the output end of the control switch group (17).

6. The asphalt mixer according to claim 2, characterized in that: Heating wires (5) are provided at the upper and lower ends of the outer arc surface of the heating inner tank (4). The input ends of the heating wires (5) are all electrically connected to the output end of the control switch group (17).

7. The asphalt mixer according to claim 2, characterized in that: A discharge pipe is provided at the lower end of the heating inner container (4), and the discharge pipe is exposed outside the outer shell (1). A valve (6) is connected in series in the middle of the discharge pipe, and the input end of the valve (6) is electrically connected to the output end of the control switch group (17).

8. The asphalt mixer according to claim 1, which is convenient for cleaning, is characterized in that: An outer shell door (8) is hinged to the front side wall of the outer shell (1) through a hinge, and an inner container door (7) is hinged to the front side wall of the heating inner container (4) through a hinge.

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