Dust recovery device for asphalt concrete production

Abstract

The invention discloses a dust recovery device for asphalt concrete production, and particularly relates to the technical field of dust recovery in asphalt concrete production, the dust recovery device comprises a supporting frame, a one-way mechanism is mounted on the other side of a recovery box, airflow plates are mounted on the front side and the rear side of the recovery box, and an air blower is fixedly mounted at the bottom of the recovery box; a flow guide plate with the arc-shaped bottom is installed in an inner cavity of the recycling box, conveying assemblies are installed on the front side and the rear side of the inner cavity of the recycling box, filter cartridges are arranged on the two sides of the flow guide plate, and a knocking mechanism is arranged on the upper portion of the flow guide plate. According to the dust recovery device for asphalt concrete production, the knocking mechanism drives the internal structure of the one-way mechanism to move while knocking the filter cartridge, and then drives the internal structure of the collecting assembly to rotate in the movement process of the one-way mechanism, so that the dust is recovered; and therefore, dust impurities entering the conveying assembly are conveyed into the storage tank to be collected, and subsequent resource recycling is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of dust recovery in asphalt concrete production, and in particular to a dust recovery device for asphalt concrete production. Background Art

[0002] Asphalt concrete, also known as asphalt concrete, is a composite material made by mixing asphalt binder, coarse and fine aggregates (crushed stone, sand), mineral powder, and additives in a specific proportion. It exhibits high strength, good deformation resistance, and durability, and is widely used in civil engineering projects such as highways, bridges, and airport runways. Its production process primarily involves aggregate drying and heating, screening, metering, and asphalt mixing. It is a core material in road construction.

[0003] Chinese Patent Publication No. CN213589997U discloses a dust recovery device for asphalt concrete production, which relates to the field of dust treatment generated by asphalt concrete, including an asphalt concrete production tank, a first connecting pipe fixedly connected to one side of the asphalt concrete production tank, a suction fan fixedly connected to the end of the first connecting pipe away from the asphalt concrete production tank, a second connecting pipe fixedly connected to the air outlet of the suction fan, a dust collection box fixedly connected to the end of the second connecting pipe away from the suction fan, a first filter fixedly installed on the inside of the dust collection box, a filter plate fixedly installed on the top of the first filter, and a water outlet hollow plate fixedly installed on the inside of the dust collection box at the upper end of the filter plate. The above patent document can filter, recover and treat the dust produced by asphalt concrete, prevent the dust produced by asphalt concrete production from entering the air to pollute the atmosphere and endanger people's health, and prevent outside air from entering the dust collection box.

[0004] However, the above patent documents still have the following defects in the implementation process:

[0005] Although the equipment in the above patent document can recycle dust in the asphalt concrete production process, it cannot simultaneously and orderly connect normal filtration and cleaning operations during actual use, which increases the filtration interruption time and reduces the recovery efficiency. Summary of the Invention

[0006] The main purpose of the present invention is to provide a dust recovery device for asphalt concrete production, which can effectively solve the problems raised in the background technology.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A dust recovery device for asphalt concrete production includes a support frame, a recovery box is installed in the middle of the support frame, two storage tanks for storing dust are provided on the right side of the recovery box, a one-way mechanism is installed on the other side of the recovery box, air flow plates are installed on the front and rear sides of the recovery box, a blower is fixedly installed on the bottom of the recovery box, a guide plate with an arc-shaped bottom is installed in the inner cavity of the recovery box, a conveying assembly is installed on the front and rear sides of the inner cavity of the recovery box, filter cartridges are provided on both sides of the guide plate, and a knocking mechanism is provided on the upper part of the guide plate.

[0009] Preferably, the knocking mechanism includes an electric telescopic cylinder and two guide rods, the electric telescopic cylinder is installed in the middle of the guide plate, the two guide rods are respectively arranged on both sides of the guide plate, the output end of the electric telescopic cylinder is installed with a lifting plate, and support columns 2 are fixedly installed on both sides of the lifting plate, and sealing covers are slidably provided on the surfaces of the two support columns 2, and fixed plates are installed at the lower ends of the two support columns 2, and knocking components for knocking on the inner cavity of the filter cartridge are installed at the lower parts of the two fixed plates.

[0010] Preferably, the knocking assembly includes a hydraulic cylinder and several sliding columns, the hydraulic cylinder is fixedly installed in the middle of the lower side of the fixed plate, several of the sliding columns are annularly distributed on the lower side of the fixed plate, a support block is commonly fixedly installed on the lower part of several of the sliding columns, a pressure plate is commonly slid on the outer surface of several of the sliding columns, and several swinging assemblies are annularly distributed on the outer arc surface of the support block.

[0011] Preferably, the output end of the hydraulic cylinder is fixedly mounted on the upper part of the pressure plate.

[0012] Preferably, the swing assembly includes a rotating block and a rack 1, the rotating block is rotatably mounted on the side of the support block away from its axis, the rack 1 is fixedly mounted on the side of the lower part of the pressure plate away from its axis, two springs are provided on the outer surface of the rotating block, and balls are provided on the side of the two springs away from the rotating block, and a gear 1 is installed on one side of the rotating block.

[0013] Preferably, the gear 1 is rotatably mounted on the surface of the support block, and the side of the rack 1 away from the support block is meshedly connected to the outer surface of the gear 1.

[0014] Preferably, the conveying assembly includes two conveying pipes, which are respectively installed on the front and rear sides of the inner cavity of the recovery box. The inner cavities of the two conveying pipes are both rotatably installed with spiral blades. The lower parts of the two conveying pipes are both provided with inclined plates, and a number of guide holes are opened on the sides of the lower arc surfaces of the two conveying pipes that are away from each other.

[0015] Preferably, the one-way mechanism includes a T-shaped plate, two support columns and a pulley assembly, the T-shaped plate is installed on the left side of the lifting plate, the support column is installed on the lower left side of the recycling box, limit blocks are installed on both sides of the support column, and a rack is slid on the side where the two limit blocks are away from each other, and the pulley assembly is arranged on the left side of the recycling box. The pulley assembly consists of two pulleys and a belt, and a ratchet pawl assembly is installed on one side of the two pulleys.

[0016] Preferably, the outer surfaces of the two ratchet pawl assemblies are both sleeved with gear rings, and the gear rings are meshed and connected to the two surfaces of the rack on the same side. The two pulleys on the side close to the recycling box pass through the outer surface of the recycling box and are fixedly installed on the spiral blade on the same side. The two pulleys on the side close to the ratchet pawl assembly are respectively connected to the inner ring and outer ring of the ratchet pawl assembly on the same side.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the knocking mechanism is set up to knock the inside of the filter cartridge evenly, and the dust attached to the surface of the filter cartridge can be completely removed by vibration to avoid local residue. Then, the filter cartridge is sealed during the knocking process in conjunction with its internal structure, which can prevent dust from overflowing during cleaning, improve cleaning cleanliness, and reduce the risk of filter cartridge clogging.

[0019] 2. In the present invention, the filter cartridge is sealed during the cleaning process by the knocking mechanism, thereby changing the air flow duct of the continuously fed dust-laden air, and bringing the shaken dust upward into the conveying component, and then using its internal structure to filter and realize the secondary separation of impurities and air, so that the impurities are collected inside the conveying component, reducing the secondary pollution caused by dust scattering.

[0020] 3. In the present invention, the knocking mechanism knocks the filter cartridge, thereby driving the internal structure of the one-way mechanism to move, and then the internal structure of the collection component is driven to rotate during the movement of the one-way mechanism, thereby transporting the dust and impurities entering the conveying component to the storage tank for collection, so as to facilitate subsequent resource recycling.

[0021] 4. In the present invention, when the filter cartridge is sealed and cleaned, the air duct design with continuous air supply at the bottom can be used to allow the dust-laden air to continue to be processed through the filter holes inside the collection component, thereby reducing the overall downtime caused by the cleaning operation, extending the filter cartridge replacement cycle, reducing equipment maintenance costs, and improving the operating efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the knocking mechanism of the present invention;

[0025] Figure 4 It is a structural schematic diagram of another state of the knocking mechanism of the present invention;

[0026] Figure 5 Schematic diagram of the guide plate structure of the present invention;

[0027] Figure 6 Schematic diagram of the cross-sectional structure of the striking component of the present invention;

[0028] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged view at point A in the middle;

[0029] Figure 8 Schematic diagram of the cross-sectional structure of the conveying assembly of the present invention;

[0030] Figure 9 It is a schematic structural diagram of the one-way mechanism of the present invention;

[0031] Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged view of point B in the middle.

[0032] In the figure: 1. Support frame; 2. Blower; 3. Recovery box; 4. Storage tank; 5. One-way mechanism; 51. T-plate; 52. Support column 1; 53. Limit block; 54. Rack 2; 55. Pulley assembly; 56. Ratchet and pawl assembly; 6. Guide plate; 7. Filter cartridge; 8. Knocking mechanism; 81. Electric telescopic cylinder; 82. Lifting plate; 83. Guide rod; 84. Support column 2; 85. Sealing cover; 8 6. Fixed plate; 87. Knocking assembly; 871. Hydraulic cylinder; 872. Sliding column; 873. Pressure plate; 874. Support block; 875. Swing assembly; 8751. Rotating block; 8752. Spring; 8753. Ball; 8754. Gear 1; 8755. Rack 1; 9. Conveying assembly; 91. Conveying pipe; 92. Spiral blade; 93. Guide hole; 94. Inclined plate; 10. Airflow plate. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] Example 1, as Figures 1 to 10As shown, a dust recovery device for asphalt concrete production includes a support frame 1, a recovery box 3 is installed in the middle of the support frame 1, two storage tanks 4 for storing dust are provided on the right side of the recovery box 3, a one-way mechanism 5 is installed on the other side of the recovery box 3, air flow plates 10 are installed on the front and rear sides of the recovery box 3, a blower 2 is fixedly installed on the bottom of the recovery box 3, a guide plate 6 with an arc-shaped bottom is installed in the inner cavity of the recovery box 3, a conveying assembly 9 is installed on the front and rear sides of the inner cavity of the recovery box 3, filter cartridges 7 are provided on both sides of the guide plate 6, and a knocking mechanism 8 is provided on the upper part of the guide plate 6.

[0035] In this case, it is first necessary to install a transmission pipe at the input end of the blower 2, and the dust generated during the asphalt concrete production process can be sucked into the recovery box 3 through the blower 2 and the transmission pipe.

[0036] During the implementation of this embodiment, the dust-laden air is sucked into the inner cavity of the recovery box 3 from the bottom of the recovery box 3 by the blower 2, and then the dust-laden air is made to flow upward in the inner cavity of the recovery box 3, so that the dust-laden air contacts the surfaces of the two filter cartridges 7, and then the dust adheres to the surface of the filter cartridge 7, so that the filtered air passes through the surface of the filter cartridge 7 and is discharged upward from the interior of the filter cartridge 7 and is discharged from the air outlet frame at the top of the recovery box 3. At the same time, under the action of the provided air flow plate 10 and the internal structure of the conveying component 9, a smaller part of the dust-laden gas is filtered through the internal structure of the conveying component 9, and then a smaller part of the gas is discharged outward from the holes on the surface of the air flow plate 10;

[0037] Then, during the continuous filtration process of the filter cartridge 7, the impurities on its surface accumulate and affect its filtration effect. At this time, the internal structure of the knocking mechanism 8 is started to move, and the internal structure of the knocking mechanism 8 is driven downward to enter the interior of the filter cartridge 7 to knock on its wall surface, so that the vibration generated by the knocking on the filter cartridge 7 vibrates the impurities attached to its surface into the inner cavity of the recovery box 3. At the same time, when the internal structure of the knocking mechanism 8 enters the inner cavity of the filter cartridge 7, the upper part of the filter cartridge 7 is sealed by the internal structure of the knocking mechanism 8, so that the air will not be discharged from the opening of the filter cartridge 7. At the same time, since the opening of the filter cartridge 7 is sealed The air is sealed and then continuously driven upward by the blower 2, so that the dust vibrated down flows through the arc surface of the lower side of the guide plate 6 to the inside of the conveying assembly 9 on both sides, so that the dust is collected inside the conveying assembly 9. Then, the internal structure of the knocking mechanism 8 moves up and down in the inner cavity of the filter cartridge 7 to knock on the inner wall of the filter cartridge 7, driving the internal structure of the one-way mechanism 5 to move, so that the internal structure of the one-way mechanism 5 drives the internal structure of the conveying assembly 9 to rotate, and under the action of the rotation of the internal structure of the conveying assembly 9, the dust entering into it is transported to the storage tank 4 for storage, thereby achieving the purpose of recycling.

[0038] In order to achieve the purpose of knocking the inner wall of the filter cartridge 7 to generate vibration, refer to Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In this solution, the knocking mechanism 8 includes an electric telescopic cylinder 81 and two guide rods 83. The electric telescopic cylinder 81 is installed in the middle of the guide plate 6. The two guide rods 83 are respectively arranged on both sides of the guide plate 6. The output end of the electric telescopic cylinder 81 is installed with a lifting plate 82. Support columns 84 are fixedly installed on both sides of the lifting plate 82. Sealing covers 85 are slid on the surfaces of the two support columns 84. Fixed plates 86 are installed at the lower ends of the two support columns 84. A knocking component 87 for knocking on the inner cavity of the filter cartridge 7 is installed at the lower part of the two fixed plates 86.

[0039] In the above, first the electric telescopic cylinder 81 is started to drive the lifting plate 82 to descend, and then during the process of the lifting plate 82 descending, the two guide rods 83 drive the two support columns 84 to descend synchronously, so that the support column 84 drives the fixed plate 86 and the knocking assembly 87 to enter the inner cavity of the filter cartridge 7, and then when the fixed plate 86 enters the inner cavity of the filter cartridge 7, the sealing cover 85 falls on the upper end of the filter cartridge 7, so that the filter cartridge 7 forms a sealed state, and at the same time, the internal driving structure of the knocking assembly 87 is started, so that the internal structure of the knocking assembly 87 moves to knock on the inner wall of the filter cartridge 7, so that the filter cartridge 7 vibrates and the dust attached to its surface falls, and then under the action of the electric telescopic cylinder 81, the knocking assembly 87 can be driven to move slowly up and down, so that the knocking assembly 87 can knock on the inner wall of the filter cartridge 7 multiple times, thereby achieving a better effect of stripping the dust from the surface of the filter cartridge 7.

[0040] In the above, the electric telescopic cylinder 81 drives the knocking assembly 87 to move up and down inside the filter cartridge 7 to knock. The sealing cover 85 is always covered on the upper end of the filter cartridge 7 by its own weight during the process of moving up and down the inner wall of the filter cartridge 7 to knock, thereby ensuring the sealing of the filter cartridge 7 during the cleaning process.

[0041] Specifically, in order to achieve the purpose of driving the internal structure of the knocking component 87 to knock on the inner wall of the filter cartridge 7, refer to Figure 6 and Figure 7 In this solution, the knocking assembly 87 includes a hydraulic cylinder 871 and several sliding columns 872. The hydraulic cylinder 871 is fixedly installed in the middle of the lower side of the fixed plate 86. Several sliding columns 872 are annularly distributed on the lower side of the fixed plate 86. A support block 874 is fixedly installed on the lower part of several sliding columns 872. A pressure plate 873 slides on the outer surface of several sliding columns 872. Several swinging assemblies 875 are annularly distributed on the outer arc surface of the support block 874.

[0042] Furthermore, the output end of the hydraulic cylinder 871 is fixedly mounted on the upper portion of the pressure plate 873 .

[0043] In the above, when the fixed plate 86 descends to the inner cavity of the filter cartridge 7, the hydraulic cylinder 871 is started to drive the pressure plate 873 to move back and forth quickly on the surface of the sliding column 872, and then the pressure plate 873 moves up and down to drive the internal structure of the swing assembly 875 to move up and down quickly, so that the internal structure of the swing assembly 875 rotates back and forth quickly, and the internal structure of the swing assembly 875 is quickly thrown toward the inner wall of the filter cartridge 7, so that the filter cartridge 7 vibrates and shakes off the dust attached to its surface.

[0044] The specific installation method of the hydraulic cylinder 871, the connection method of the oil circuit, and the control method used in the above-mentioned are all conventional designs and will not be elaborated in detail in the present invention.

[0045] Specifically, in order to achieve the purpose of knocking the inner wall of the filter cartridge 7, refer to Figure 7 In this solution, the swing assembly 875 includes a rotating block 8751 and a rack 1 8755. The rotating block 8751 is rotatably installed on the side of the support block 874 away from its axis, and the rack 1 8755 is fixedly installed on the side of the lower part of the pressure plate 873 away from its axis. Two springs 8752 are provided on the outer surface of the rotating block 8751, and a ball 8753 is provided on the side of the two springs 8752 away from the rotating block 8751. A gear 1 8754 is installed on one side of the rotating block 8751.

[0046] Furthermore, the gear 1 8754 is rotatably mounted on the surface of the support block 874 , and the rack 1 8755 is meshedly connected to the outer surface of the gear 1 8754 on a side away from the support block 874 .

[0047] In the above, the pressure plate 873 moves up and down quickly, so that the pressure plate 873 drives the rack 1 8755 to move up and down quickly, and then the gear 1 8754 meshing with it is driven to rotate quickly during the process of the rack 1 8755 moving up and down, and then the rotating block 8751 is driven to rotate back and forth during the rapid rotation of the gear 1 8754. When the rotating block 8751 rotates quickly, the spring 8752 is driven to swing quickly to produce deformation, so that the spring 8752 is swung quickly and drives the ball 8753 to the inner wall of the filter cartridge 7, so that the filter cartridge 7 vibrates to fall off the dust attached to its surface.

[0048] In order to collect the dust and transport it to the storage tank 4 for storage, Figure 8In this solution, the conveying assembly 9 includes two conveying pipes 91, which are respectively installed on the front and rear sides of the inner cavity of the recovery box 3. The inner cavities of the two conveying pipes 91 are both rotatably installed with spiral blades 92. The lower parts of the two conveying pipes 91 are both provided with inclined plates 94, and a number of guide holes 93 are opened on the side of the lower arc surface of the two conveying pipes 91 away from each other.

[0049] In the above, by sealing and knocking the filter cartridge 7, the dust that falls due to vibration is blown upward by the blower 2, and then the air containing a large amount of dust flows to both sides through the arc surface at the bottom of the guide plate 6, and is then guided upward by the two inclined plates 94, and then the dust-containing air quickly flows outward through the guide holes 93, and then when the air passes through the guide holes 93, the impurities are isolated inside the conveying pipe 91 through the guide holes 93, and then the internal structure of the one-way mechanism 5 is driven to move in the process of the electric telescopic cylinder 81 driving the lifting plate 82 to move up and down, so that the movement of the internal structure of the one-way mechanism 5 drives the spiral blade 92 to rotate continuously in the inner cavity of the conveying pipe 91, and during the continuous rotation of the spiral blade 92, the dust collected in the inner cavity of the conveying pipe 91 is driven to be transported to the inside of the storage tank 4, and at the same time, during the rotation of the spiral blade 92, its blade simultaneously scrapes off the dust attached to the inner wall of the conveying pipe 91 and transports it to the inner cavity of the storage tank 4 synchronously, maintaining the airflow filtering performance of the guide hole 93.

[0050] Example 4: In order to achieve the purpose of driving the spiral blade 92 to rotate continuously during the knocking process of the filter cartridge 7, refer to Figure 9 and Figure 10 In this solution, the one-way mechanism 5 includes a T-shaped plate 51, two support columns 52 and a pulley assembly 55. The T-shaped plate 51 is installed on the left side of the lifting plate 82, and the support column 52 is installed on the lower left side of the recycling box 3. Limit blocks 53 are installed on both sides of the support column 52. Rack 2 54 is sliding on the side where the two limit blocks 53 are away from each other. The pulley assembly 55 is arranged on the left side of the recycling box 3. The pulley assembly 55 consists of two pulleys and a belt. A ratchet pawl assembly 56 is installed on one side of the two pulleys.

[0051] Furthermore, the outer surfaces of the two ratchet pawl assemblies 56 are both sleeved with gear rings, and the gear rings are meshed and connected to the surface of the rack 2 54 on the same side. The two pulleys on the side close to the recycling box 3 pass through the outer surface of the recycling box 3 and are fixedly installed on the spiral blade 92 on the same side. The two pulleys on the side close to the ratchet pawl assembly 56 are respectively connected to the inner ring and outer ring of the ratchet pawl assembly 56 on the same side.

[0052] In the above, the lifting plate 82 is lowered to drive the T-shaped plate 51 to descend synchronously, and then the T-shaped plate 51 is lowered to drive the two racks 54 to slide up and down in the inner cavities on both sides of the limit block 53, and then the two racks 54 drive the ring gear on the same side to rotate, and the ring gear on the same side drives the ratchet pawl assembly 56 on the same side to rotate, so that the two ratchet pawl assemblies 56 drive the pulleys on the same side to rotate, and at the same time, under the action of the ratchet pawl assembly 56 and the two pulleys, the lifting plate 82 drives the T-shaped plate 51 and the rack 2 54 to move up and down, and always drives the pulley and the belt to rotate in one direction, so that the two pulleys always drive the spiral blades 92 to rotate in one direction, thereby ensuring the dust conveying rate;

[0053] The two pulleys are respectively connected to the outer ring and inner ring of the ratchet pawl assembly 56. During the process of the two racks 2 54 moving away from each other descending, the inner ring of the ratchet pawl assembly 56 on one side is driven to rotate, and the outer ring on the other side is rotated on its inner ring surface, so that the inner ring on one side and the outer ring on the other side drive the pulleys to rotate. Similarly, during the rising process of the two racks 2 54, the above operations are performed in the opposite direction, so that the two pulleys can always be driven to rotate in one direction.

[0054] The ratchet pawl assembly 56 mentioned above adopts the ratchet pawl principle inside the bicycle in the prior art, so that it can drive the pulley on the same side to rotate in one direction, and this solution will not be elaborated in detail.

[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust recovery device for asphalt concrete production, comprising a support frame (1), characterized in that: A recovery box (3) is installed in the middle of the support frame (1), two storage tanks (4) for storing dust are arranged on the right side of the recovery box (3), a one-way mechanism (5) is installed on the other side of the recovery box (3), air flow plates (10) are installed on the front and rear sides of the recovery box (3), a blower (2) is fixedly installed on the bottom of the recovery box (3), a guide plate (6) with an arc-shaped bottom is installed in the inner cavity of the recovery box (3), a conveying assembly (9) is installed on the front and rear sides of the inner cavity of the recovery box (3), filter cartridges (7) are arranged on both sides of the guide plate (6), and a knocking mechanism (8) is arranged on the upper part of the guide plate (6).

2. A dust recovery device for asphalt concrete production according to claim 1, characterized in that: The knocking mechanism (8) comprises an electric telescopic cylinder (81) and two guide rods (83), wherein the electric telescopic cylinder (81) is mounted in the middle of the guide plate (6), and the two guide rods (83) are respectively arranged on both sides of the guide plate (6). A lifting plate (82) is mounted on the output end of the electric telescopic cylinder (81), and two support columns (84) are fixedly mounted on both sides of the lifting plate (82). Sealing covers (85) are slidably mounted on the surfaces of the two support columns (84), and fixed plates (86) are mounted on the lower ends of the two support columns (84). A knocking assembly (87) for knocking the inner cavity of the filter cartridge (7) is mounted on the lower parts of the two fixed plates (86).

3. The dust recovery device for asphalt concrete production according to claim 2, characterized in that: The knocking assembly (87) includes a hydraulic cylinder (871) and a plurality of sliding columns (872), wherein the hydraulic cylinder (871) is fixedly mounted on the middle portion of the lower side of the fixed plate (86), and the plurality of sliding columns (872) are annularly distributed and arranged on the lower side of the fixed plate (86), a support block (874) is fixedly mounted on the lower portions of the plurality of sliding columns (872), a pressure plate (873) is slidably mounted on the outer surfaces of the plurality of sliding columns (872), and a plurality of swinging assemblies (875) are annularly distributed and arranged on the outer arc surface of the support block (874).

4. A dust recovery device for asphalt concrete production according to claim 3, characterized in that: The output end of the hydraulic cylinder (871) is fixedly mounted on the upper portion of the pressure plate (873).

5. The dust recovery device for asphalt concrete production according to claim 3, characterized in that: The swing assembly (875) includes a rotating block (8751) and a rack (8755). The rotating block (8751) is rotatably mounted on a side of the support block (874) away from its axis. The rack (8755) is fixedly mounted on a side of the lower portion of the pressure plate (873) away from its axis. Two springs (8752) are provided on the outer surface of the rotating block (8751). A ball (8753) is provided on the side of the two springs (8752) away from the rotating block (8751). A gear (8754) is installed on one side of the rotating block (8751).

6. A dust recovery device for asphalt concrete production according to claim 5, characterized in that: The gear one (8754) is rotatably mounted on the surface of the support block (874), and the side of the rack one (8755) away from the support block (874) is meshedly connected to the outer surface of the gear one (8754).

7. The dust recovery device for asphalt concrete production according to claim 2, characterized in that: The conveying assembly (9) includes two conveying pipes (91), which are respectively installed at the front and rear sides of the inner cavity of the recovery box (3). The inner cavities of the two conveying pipes (91) are both rotatably installed with spiral blades (92). The lower parts of the two conveying pipes (91) are both provided with inclined plates (94). The lower arc surfaces of the two conveying pipes (91) are both provided with a plurality of guide holes (93) on the sides away from each other.

8. The dust recovery device for asphalt concrete production according to claim 7, characterized in that: The one-way mechanism (5) includes a T-shaped plate (51), two support columns (52) and a pulley assembly (55), wherein the T-shaped plate (51) is installed on the left side of the lifting plate (82), the support column (52) is installed on the lower left side of the recycling box (3), and limit blocks (53) are installed on both sides of the support column (52), and a rack (54) is slidably provided on the side away from each other of the two limit blocks (53). The pulley assembly (55) is arranged on the left side of the recycling box (3), and the pulley assembly (55) consists of two pulleys and a belt, and a ratchet pawl assembly (56) is installed on one side of the two pulleys.

9. A dust recovery device for asphalt concrete production according to claim 8, characterized in that: The outer surfaces of the two ratchet pawl assemblies (56) are both sleeved with gear rings, and the gear rings are meshed and connected to the surface of the second rack (54) on the same side. The sides of the two pulleys close to the recycling box (3) pass through the outer surface of the recycling box (3) and are fixedly installed on the spiral blade (92) on the same side. The sides of the two pulleys close to the ratchet pawl assembly (56) are respectively connected to the inner ring and outer ring of the ratchet pawl assembly (56) on the same side.

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