Dust removal device for asphalt concrete production

Abstract

The utility model relates to the technical field of asphalt concrete production, and disclose a dust collector for asphalt concrete production, including mixed stirrer, the mixed stirrer top opening portion fixedly connected with semicircle apron no.

Description

Technical Field

[0001] This utility model relates to the field of asphalt concrete production technology, and more specifically to a dust removal device for asphalt concrete production. Background Technology

[0002] As an important road construction material, asphalt concrete requires the mixing of aggregates, fillers, and asphalt in a mixer for forced mixing during its production process. In this process, especially when dry aggregates come into contact with hot asphalt, a large amount of high-temperature, high-concentration, and adhesive dust is generated. This dust not only contains ordinary mineral particles but also asphalt fumes, resulting in a complex composition and serious pollution.

[0003] When removing dust from inside a mixer, negative pressure suction or inward blowing is generally used. When using blowing, the nozzle needs to be inserted into the mixer. Because the inside of the mixer is relatively humid, a lot of dust will stick to the end of the nozzle during long-term operation. If it is not cleaned, it will block the air inlet and affect the dust removal operation. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a dust removal device for asphalt concrete production, which solves the problem that dust easily adheres to the air inlet during the dust removal process, and if it is not treated, long-term adhesion will block the air inlet and affect the dust removal operation.

[0005] This utility model provides the following technical solution: a dust removal device for asphalt concrete production, comprising a mixing mixer, a semi-circular cover plate 1 fixedly connected to the top opening of the mixing mixer, a second semi-circular cover plate 2 hinged to one side of the first semi-circular cover plate, a square opening on the first semi-circular cover plate, a fan box fixedly connected inside the square opening, an air inlet on the top wall of the fan box, a blower fixedly connected to the top outer wall of the fan box and located at the air inlet, and an air outlet pipe connected to the inside of the mixing mixer fixedly connected to the upper surface of the first semi-circular cover plate. The bottom wall of the box is equipped with multiple air inlets, each with a through-hole rod slidably connected inside. The through-hole rods are fixed together by a connecting bracket. An electric push rod is fixedly connected to the top outer wall of the fan box. The piston rod of the electric push rod passes through the top wall of the fan box and is fixed to the connecting bracket. The electric push rod drives the through-hole rod to reciprocate within the air inlet, which can effectively break up and remove sticky dust clumps adhering to the air inlet. This fundamentally solves the industry problem of easy clogging of traditional dust removal devices in asphalt concrete conditions, ensuring the continuity and stability of dust removal operations.

[0006] As a further embodiment of this utility model, an exhaust pipe for use with an air outlet pipe is fixedly connected to the outer circumference of the mixing mixer via a pipe frame. A dust collection bag is fixedly installed at the bottom end of the exhaust pipe via a clamp, providing a closed collection path for the extracted dusty air. This allows the dust to be ultimately collected and sealed in the dust collection bag, effectively preventing the dust from escaping during the emission process, avoiding secondary pollution, and facilitating centralized treatment of the collected dust, thus improving environmental friendliness.

[0007] As a further embodiment of this utility model, a sprayer is fixedly connected to the upper surface of the semi-circular cover plate. The sprayer nozzle is installed at the top of the exhaust pipe, and the spray surface of the nozzle extends into the exhaust pipe, so that the water mist can be fully mixed and adsorbed with the high-speed moving dust-laden air, causing the fine dust particles to increase in weight and agglomerate, thereby greatly improving the dust removal efficiency and effectively suppressing the dust in the exhaust pipe and dust collection bag, solving the problem that dry dust can easily penetrate or clog the dust collection bag.

[0008] As a further embodiment of this utility model, a discharge hopper is fixedly connected to the bottom outer wall of the mixing mixer. A chute is provided near the top of the discharge hopper, and a baffle is slidably connected in the chute to block the material, thereby controlling the opening and closing of the discharge port. The structure is simple, the operation is flexible and convenient, and the sealed discharge and flow control of the mixer are realized, avoiding accidental leakage of materials during dust removal or mixing, and ensuring the continuity and sealing of the production process.

[0009] As a further embodiment of this utility model, slide rails are fixedly connected to the inner walls on both sides of the multiple fan boxes, and sliders that cooperate with the slide rails are fixedly connected to both sides of the connecting bracket. This provides a stable linear guide for the reciprocating motion of the connecting bracket and the through-hole rod, ensuring that all through-hole rods can move synchronously, smoothly, and linearly, preventing deflection, jamming, or wear during the movement, and greatly improving the reliability and service life of the actuator.

[0010] As a further embodiment of this utility model, an L-shaped pipe frame is fixedly connected between the air outlet pipe and the fan box, and the air outlet pipe is L-shaped, including a vertical section and a horizontal section that communicate with the interior of the mixing mixer. One end of the L-shaped pipe frame extends from the top of the vertical section of the air outlet pipe and along the air outlet direction of the horizontal section of the air outlet pipe, with the extension distance slightly greater than the diameter of the vertical section of the air outlet pipe. The fan box and the air outlet pipe are connected by the L-shaped pipe frame. First, a smooth and directional airflow channel can be formed in the air outlet pipe, which greatly reduces the turbulence, eddies and frontal impact generated by the airflow at the bend and the inner wall of the air outlet pipe, and effectively reduces the wind pressure loss. Second, a Venturi effect (ejection function) can be formed to realize the rapid extraction of the mixture of air and dust in the mixing mixer.

[0011] As a further embodiment of this utility model, the bottom of the through-hole rod is provided with a tapered chamfer. The diameter of the tapered chamfer is smaller than the outer diameter of the through-hole rod, which reduces the resistance of the through-hole rod when it descends through the adhesive dust layer, making it easier to penetrate and break up the clumps.

[0012] As a further embodiment of this utility model, the inner circumference of the mixing mixer, located below the first and second semicircular cover plates, is fixedly connected by bolts to a fixing ring that supports both of them. This provides a solid support platform for the first and second semicircular cover plates from below, effectively enhancing the structural strength and stability of the cover plate installation, preventing deformation, sinking, or poor sealing due to long-term heavy loads or vibrations, and improving the overall durability and reliability of the equipment.

[0013] The technical effects and advantages of this utility model are as follows: 1. This utility model uses an electric push rod to drive a through-hole rod to reciprocate inside the air inlet head, which can effectively break up and push off the asphalt concrete dust blocks attached to the bottom of the air inlet head. This fundamentally solves the technical problem of dust removal devices being easily clogged in humid and sticky dust conditions, and ensures the continuity and stability of dust removal operations.

[0014] 2. This utility model combines the dust-blowing component generated by the blower with the water mist sprayed by the sprayer to form a dual dust removal mechanism of mechanical dust collection and spray dust suppression, which greatly improves the dust removal efficiency.

[0015] 3. This utility model, by placing the spray head at the top of the exhaust pipe, allows the water mist to be fully and pre-mixed with the dust-laden air inside the pipe. The dust particles are coated with water mist, become heavier, and are easier to settle, greatly reducing the filtration load on the downstream dust collection bag.

[0016] 4. This utility model connects the fan box and the air outlet pipe through an L-shaped pipe frame. First, it can form a smooth and directional airflow channel in the air outlet pipe, which greatly reduces the turbulence, eddies and frontal impacts generated by the airflow at the bend and the inner wall of the air outlet pipe, and effectively reduces the wind pressure loss. Second, it can form a Venturi effect (ejection function) to realize the rapid extraction of the mixture of air and dust in the mixer.

[0017] 5. This utility model, through the provided dust collection bag, ultimately collects the moistened dust in the dust collection bag, effectively avoiding the secondary pollution problem caused by dry dust escaping from the micropores of the dust collection bag, resulting in cleaner exhaust air and meeting strict environmental protection requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of this utility model.

[0019] Figure 2This is a schematic diagram of the rear three-dimensional structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the mixing mixer of this utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of the fan box of this utility model.

[0022] Figure 5 This utility model Figure 4 A partially enlarged structural diagram.

[0023] Figure 6 This is a schematic diagram of the connection structure between the L-shaped pipe rack and the air outlet pipe of this utility model.

[0024] The attached diagram is labeled as follows: 1. Mixing mixer; 2. Semicircular cover plate one; 3. Semicircular cover plate two; 4. Square opening; 5. Fan box; 6. Air inlet; 7. Blower; 8. L-shaped pipe rack; 9. Air outlet pipe; 10. Exhaust pipe; 11. Dust collection bag; 12. Clamp; 13. Discharge hopper; 14. Slide chute; 15. Baffle; 16. Sprayer; 17. Air inlet head; 18. Through-hole rod; 19. Connecting bracket; 20. Electric push rod; 21. Slider; 22. Slide rail. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Reference Figures 1-6 This utility model provides a dust removal device for asphalt concrete production, including a mixer 1. A semi-circular cover plate 2 is bolted to the top opening of the mixer 1. A second semi-circular cover plate 3 is hinged to one side of the first semi-circular cover plate 2. A square opening 4 is provided on the first semi-circular cover plate 2. A fan box 5 is bolted to the square opening 4. An air inlet 6 is provided on the top wall of the fan box 5. A blower 7 (MS-405A low-pressure blower) is bolted to the top outer wall of the fan box 5 and located on the air inlet 6. An air outlet pipe 9 communicating with the inside of the mixer 1 is welded to the upper surface of the first semi-circular cover plate 2.

[0027] The bottom wall of the fan box 5 is provided with multiple air inlets 17, and each air inlet 17 is slidably connected with a through-hole rod 18. The multiple through-hole rods 18 are fixed together by a connecting bracket 19. An electric push rod 20 is fixedly connected to the top outer wall of the fan box 5 by bolts. The piston rod of the electric push rod 20 passes through the top wall of the fan box 5 and is fixed to the connecting bracket 19. It should be noted that the electric push rod 20 is existing technology and can be used with magnetic switches, proximity switches or photoelectric switches to achieve precise control of the push rod's extension and retraction displacement. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0028] During the material mixing process in the mixer 1, a large amount of dust will be generated. At this time, the blower 7 and the electric push rod 20 are started. After the blower 7 starts running, the outside air is drawn into the blower box 5 from the air inlet 6, and the air is blown into the mixer 1 through the air inlet 17 in the blower box 5 to form an airflow. Then, the airflow carrying dust is guided into the exhaust pipe 10 along the air outlet 9, and the dust is collected by the dust collection bag 11. During the dust removal process, the electric push rod 20 periodically pushes the connecting bracket 19 to move up and down, thereby causing all the through-hole rods 18 to slide synchronously within the air inlet head 17. When the through-hole rod 18 moves down, its entire body will enter the channel of the air inlet head 17 and extend out, pushing off the dust particles that have accumulated below the air inlet head 17 to prevent blockage. The electric push rod 20 drives the through-hole rod 18 to reciprocate within the air inlet head 17, which can effectively break up and push off the asphalt concrete dust blocks attached to the bottom of the air inlet head 17. This fundamentally solves the technical problem of dust removal devices being easily clogged in humid and sticky dust conditions, and ensures the continuity and stability of dust removal operations.

[0029] Furthermore, an exhaust pipe 10 for use with an exhaust pipe 9 is fixedly connected to the outer circumference of the mixer 1 via a pipe frame, and a dust collection bag 11 is fixedly installed at the bottom end of the exhaust pipe 10 via a clamp 12. The dust collected by the dust collection bag 11 is finally collected in the dust collection bag 11 after being moistened, which effectively avoids the secondary pollution problem caused by the dry dust escaping from the micropores of the dust collection bag 11, and the emitted air is cleaner and meets the strict environmental protection requirements.

[0030] Furthermore, a sprayer 16 (a KLC-5L electric sprayer) is fixedly connected to the upper surface of the semi-circular cover plate 2 by bolts. The spray head of the sprayer 16 is installed at the top of the exhaust pipe 10, and the spray surface of the spray head extends into the exhaust pipe 10. By combining the dust removal components generated by the blower 7 with the water mist sprayed by the sprayer 16, a dual dust removal mechanism of mechanical dust removal and spray dust suppression is formed, which greatly improves the dust removal efficiency. After the dust-laden air enters the exhaust duct 10, the sprayer 16 is activated. The sprayer 16 atomizes water and sprays it into the top of the exhaust duct 10. The water mist mixes thoroughly with the rapidly descending dust-laden air. The dust particles are adsorbed, increased in weight, and agglomerated by the water mist. These moist dust clumps settle into the dust collection bag 11 under the action of gravity. The dust collection bag 11 performs the final interception and collection of the remaining wet dust, and the purified air is discharged from the tiny pores of the dust collection bag 11. By placing the spray nozzle at the top of the exhaust pipe 10, the water mist and dust-laden air are fully and pre-mixed in the pipe. The dust particles are coated with water mist and become heavier, making them easier to settle, which greatly reduces the filtration load on the rear dust collection bag 11.

[0031] In this utility model, a discharge hopper 13 is fixedly connected to the bottom outer wall of the mixing mixer 1 by bolts. A chute 14 is provided near the top of the discharge hopper 13, and a baffle 15 for blocking the material is slidably connected in the chute 14.

[0032] In this utility model, slide rails 22 are fixedly connected to the inner walls of both sides of multiple fan boxes 5 by bolts, and sliders 21 that cooperate with slide rails 22 are fixedly connected to both sides of the connecting bracket 19 by bolts. The sliders 21 on both sides of the connecting bracket 19 cooperate with the slide rails 22 on the inner wall of the fan box 5 to ensure the smoothness and straightness of the movement. The connecting bracket 19 moves through the cooperation of the sliders 21 and the slide rails 22, which ensures the smoothness and straightness of the reciprocating motion of the through hole rod 18, avoids jamming and uneven wear, improves the reliability and service life of the actuator, and reduces the failure rate.

[0033] An L-shaped pipe bracket 8 is welded between the air outlet pipe 9 and the fan box 5, and is connected to both of them. The air outlet pipe 9 and the fan box 5 are fixedly connected by an L-shaped pipe bracket 8, one end of which extends into the air outlet pipe 9. The air outlet pipe 9 is L-shaped and includes a vertical section and a horizontal section that are connected to the interior of the mixing mixer 1. One end of the L-shaped pipe bracket 8 extends from the top of the vertical section of the air outlet pipe 9 and along the air outlet direction of the horizontal section of the air outlet pipe 9. The extension distance is slightly greater than the diameter of the vertical section of the air outlet pipe 9. It is used to introduce the air in the fan box 5 into the air outlet pipe 9.

[0034] The fan box 5 is connected to the air outlet pipe 9 by the L-shaped pipe frame 8. First, a smooth and directional airflow channel can be formed in the air outlet pipe 9, which greatly reduces the turbulence, eddies and frontal impact generated by the airflow at the bend and the inner wall of the air outlet pipe 9, and effectively reduces the wind pressure loss. Second, a Venturi effect (ejection function) can be formed to realize the rapid extraction of the air and dust mixture in the mixer 1.

[0035] In this utility model, the bottom of the through-hole rod 18 is provided with a tapered chamfer, and the diameter of the tapered chamfer is smaller than the outer diameter of the through-hole rod 18.

[0036] In this invention, the inner circumference of the mixer 1, located below the semicircular cover plate 2 and the semicircular cover plate 3, is fixedly connected by bolts to a fixing ring that bears the load for both.

[0037] When material needs to be discharged, simply slide open the baffle 15 on the discharge hopper 13. When maintenance or cleaning is required, the hinged semi-circular cover plate 2 3 can be opened.

[0038] The use of this utility model involves the following steps: S1: During the material mixing process in the mixer 1, a large amount of dust will be generated. At this time, the blower 7 and the electric push rod 20 are started. After the blower 7 starts running, it draws external air into the blower box 5 from the air inlet 6, and blows the air into the mixer 1 through the air inlet 17 in the blower box 5 to form an airflow. Then, the airflow carrying dust is guided into the exhaust pipe 10 along the air outlet 9, and the dust is collected by the dust collection bag 11. S2: During the dust removal process, the electric push rod 20 periodically pushes the connecting bracket 19 to move up and down, thereby driving all the through-hole rods 18 to slide synchronously in the air inlet head 17. When the through-hole rod 18 moves down, its body will enter the channel of the air inlet head 17 and extend out, pushing off the dust particles attached to the bottom of the air inlet head 17 to prevent blockage. S3: After the dust-laden air enters the exhaust duct 10, the sprayer 16 is activated. The sprayer 16 atomizes water and sprays it into the top of the exhaust duct 10. The water mist mixes thoroughly with the rapidly descending dust-laden air. The dust particles are adsorbed, increased in weight, and agglomerated by the water mist. These moist dust clumps settle into the dust collection bag 11 under the action of gravity. The dust collection bag 11 performs the final interception and collection of the remaining wet dust, and the purified air is discharged from the tiny pores of the dust collection bag 11.

[0039] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs. The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A dust removal device for asphalt concrete production, comprising a mixing mixer (1), characterized in that: The mixing mixer (1) has a semi-circular cover plate 1 (2) fixedly connected to its top opening. A semi-circular cover plate 2 (3) is hinged to one side of the semi-circular cover plate 1 (2). A square opening (4) is provided on the semi-circular cover plate 1 (2). A fan box (5) is fixedly connected inside the square opening (4). An air inlet (6) is provided on the top wall of the fan box (5). A blower (7) is fixedly connected to the top outer wall of the fan box (5) and located at the air inlet (6). The upper surface of the semi-circular cover plate 1 (2) The blower box (5) is fixedly connected to an air outlet pipe (9) that communicates with the inside of the mixer (1). Multiple air inlets (17) are provided on the bottom wall of the blower box (5). Each air inlet (17) is slidably connected to a through-hole rod (18). The multiple through-hole rods (18) are fixed together by a connecting bracket (19). An electric push rod (20) is fixedly connected to the top outer wall of the blower box (5). The piston rod of the electric push rod (20) passes through the top wall of the blower box (5) and is fixed to the connecting bracket (19).

2. The dust removal device for asphalt concrete production according to claim 1, characterized in that: The outer circumference of the mixing mixer (1) is fixedly connected to an exhaust pipe (10) that works with the exhaust pipe (9) via a pipe frame. The bottom end of the exhaust pipe (10) is fixedly fitted with a dust collection bag (11) via a clamp (12).

3. The dust removal device for asphalt concrete production according to claim 1, characterized in that: A sprayer (16) is fixedly connected to the upper surface of the semi-circular cover plate (2). The spray head of the sprayer (16) is installed at the top of the exhaust pipe (10), and the spray surface of the spray head extends into the exhaust pipe (10).

4. A dust removal device for asphalt concrete production according to claim 2, characterized in that: A discharge hopper (13) is fixedly connected to the bottom outer wall of the mixing mixer (1). A chute (14) is provided near the top of the discharge hopper (13). A baffle (15) is slidably connected in the chute (14) to block the material.

5. A dust removal device for asphalt concrete production according to claim 1, characterized in that: Each of the fan boxes (5) has a slide rail (22) fixedly connected to its inner side wall, and each of the connecting brackets (19) has a slider (21) fixedly connected to its sides for use with the slide rail (22).

6. A dust removal device for asphalt concrete production according to claim 1, characterized in that: An L-shaped pipe frame (8) is fixedly connected between the air outlet pipe (9) and the fan box (5) and communicates with both. The air outlet pipe (9) is L-shaped, including a vertical section and a horizontal section that are connected to the inside of the mixing mixer (1). One end of the L-shaped pipe frame (8) extends from the top of the vertical section of the air outlet pipe (9) and along the air outlet direction of the horizontal section of the air outlet pipe (9), with the extension distance being slightly greater than the diameter of the vertical section of the air outlet pipe (9).

7. A dust removal device for asphalt concrete production according to claim 1, characterized in that: The bottom of the through-hole rod (18) is provided with a tapered chamfer, the diameter of which is smaller than the outer diameter of the through-hole rod (18).

8. A dust removal device for asphalt concrete production according to claim 4, characterized in that: The inner circumference of the mixing mixer (1) and located below the semi-circular cover plate one (2) and the semi-circular cover plate two (3) are fixedly connected by bolts to a fixing ring that bears the load.

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