Dust-proof asphalt powder feeding device

Abstract

The utility model belongs to powder conveying technical field, concretely provides an asphalt powder feeding device of dustproof, including feed tank, bag cutting mechanism, first dustproof board, second dustproof board, blanking mechanism and screw conveyor, feed tank has accommodating cavity, feed channel, discharge channel and cleaning mouth. Work, the powder of bagged is from feed channel and is put into accommodating cavity, after bag cutting mechanism, the packing bag falls to the sieve plate, and the first driving element drives the up and down vibration of sieve plate and makes the powder pass discharge channel and enter screw conveyor, is transported to asphalt mixing plant by screw conveyor. The first dustproof board and second dustproof board of the application are set up on the feed tank, can prevent dust from escaping from the feed tank, the discharge pipe is connected with the feed end of asphalt mixing plant, can prevent dust from escaping from the discharge pipe, help to reduce the dust raised when feeding and discharging of feeding machine.

Description

Technical Field

[0001] This application belongs to the field of powder conveying technology, and more specifically, relates to a dust-preventing asphalt powder feeding device. Background Technology

[0002] Asphalt mixture is a composite material mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder. For some pavements with color requirements, color powder can be added, and modified asphalt may also contain rubber powder. Among them, mineral powder, color powder, and rubber powder are all powder materials, characterized by small particle size and light weight.

[0003] Most powder materials purchased on the market are packaged in bags. When feeding them into asphalt mixing equipment, the bags need to be cut open before the powder is poured into the feed inlet of the feeding machine, which then transports the powder to the mixing equipment. Common feeding machines include belt conveyors and screw conveyors. Dust is easily generated when pouring powder into the feed inlet and when the feeding machine discharges. This dust, scattered throughout the production workshop, not only affects the cleanliness of the workshop environment but also has an adverse effect on the health of workers. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a dust-proof asphalt powder feeding device to solve the technical problem that the feeding machine in the prior art is prone to generating dust during feeding and discharging.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a dust-preventing asphalt powder feeding device, comprising:

[0006] The feeding box has a receiving cavity, the bottom of which has a discharge channel, one side of which has a feeding channel and the other side has a cleaning port. The feeding channel is inclined downward along the feeding direction, and the bottom of the feeding channel has a tool clearance opening.

[0007] The bag-cutting mechanism is located at the cutter clearance and has a cutting edge extending into the feed channel;

[0008] The first dustproof plate is movably disposed at the entrance of the feeding channel;

[0009] The second dustproof plate is movably disposed at the cleaning port;

[0010] The material feeding mechanism includes a screen plate horizontally disposed within the receiving cavity, and a first driving member that drives the screen plate to vibrate up and down. The screen plate is located below the connection between the feeding channel and the receiving cavity.

[0011] The screw conveyor is inclined vertically. The lower part of the screw conveyor is the feed end and has a feed pipe that communicates with the discharge channel. The upper part of the screw conveyor is the discharge end and has a discharge pipe. The discharge pipe is a flexible telescopic pipe that can extend and retract vertically.

[0012] In one possible implementation, the connection between the discharge channel and the receiving cavity is funnel-shaped.

[0013] In one possible implementation, the bag-cutting mechanism includes:

[0014] A cutter head, disposed at the cutter clearance opening, wherein the outer peripheral edge of the cutter head forms the cutting edge; and

[0015] The second driving component is located in the feed channel and is used to drive the cutter head to rotate around its own horizontal axis.

[0016] In one possible implementation, multiple cutter heads are spaced apart along the horizontal direction, and the multiple cutter heads are coaxially connected.

[0017] In one possible implementation, the material feeding mechanism is provided in multiple circumferentially spaced parts along the feed box.

[0018] In one possible implementation, the first driving component is a drive motor, which is located on the side wall of the feed box. The motor shaft of the drive motor is connected to a cam, which is located below the screen plate, and the outer peripheral surface of the cam abuts against the screen plate.

[0019] In one possible implementation, the side wall of the feed box with the cleaning port is provided with a groove, the groove extends in the vertical direction, and the second dustproof plate is slidably engaged with the groove;

[0020] The dust-proof asphalt powder feeding device also includes a first lifting component, which is located in the feeding box and is used to drive the second dustproof plate to move along the chute.

[0021] In one possible implementation, the dust-preventing asphalt powder feeding device further includes a cleaning mechanism, which comprises:

[0022] Four suspension cables are respectively connected to the four corners of the sieve plate, with the lower end of each cable connected to the sieve plate. The upper ends of the two suspension cables adjacent to the cleaning port are connected to the top wall of the receiving cavity.

[0023] Two second lifting components are located at the top of the feed box, and the two second lifting components are respectively connected to the upper ends of the two suspension cables that are far away from the cleaning port.

[0024] In one possible implementation, the discharge pipe includes:

[0025] The first pipe fitting is arranged vertically, and its upper end is connected to the screw conveyor.

[0026] The second pipe fitting is vertically arranged and located below the first pipe fitting, and its lower end is provided with a flange mounting plate; and

[0027] A corrugated connecting pipe is arranged vertically, with its upper end fitted onto the first pipe fitting and its lower end fitted onto the second pipe fitting.

[0028] In one possible implementation, the outer diameter of the first fitting is smaller than the inner diameter of the second fitting, and the lower end of the first fitting extends into the second fitting.

[0029] Compared with the prior art, the beneficial effects of the dust-preventing asphalt powder feeding device provided in this application are:

[0030] The dust-prevention asphalt powder feeding device provided in this application includes a feeding hopper, a bag-cutting mechanism, a first dustproof plate, a second dustproof plate, a material discharge mechanism, and a screw conveyor. The feeding hopper has a receiving cavity, a feeding channel, a discharging channel, and a cleaning port. During operation, bagged powder is fed into the receiving cavity through the feeding channel. After passing through the bag-cutting mechanism, the packaging bag is ripped open, and the ripped bag falls onto the screen plate. A first driving component drives the screen plate to vibrate up and down, causing the powder to pass through the discharging channel and the feeding pipe into the screw conveyor, which then transports it to the asphalt mixing equipment. During the up-and-down vibration of the screen plate, both the first and second dustproof plates are sealed to prevent dust from escaping. After the powder is discharged, the second dustproof plate can be opened, and the empty packaging bag can be removed from the cleaning port.

[0031] This application enables automatic bag opening of bagged powder by installing a feeding box, a bag cutting mechanism, and a discharge mechanism at the feeding end of a screw conveyor. The powder then enters the screw conveyor through the discharge channel and is transported to the asphalt mixing plant. This application solves the dust problem caused by manual bag opening and dumping of powder. The first and second dustproof plates prevent dust from escaping from the feeding box, and the discharge pipe is connected to the feeding end of the asphalt mixing plant to prevent dust from escaping from the discharge pipe. This reduces the dust generated by the feeding and discharging machines in the prior art. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 The three-dimensional asphalt powder feeding device for dust prevention provided in the embodiments of this application Figure 1 ;

[0034] Figure 2 Internal cross-section of the dust-proof asphalt powder feeding device provided in the embodiments of this application. Figure 1 ;

[0035] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0036] Figure 4 Internal cross-section of the dust-proof asphalt powder feeding device provided in the embodiments of this application. Figure 2 ;

[0037] Figure 5 for Figure 4 Enlarged view of part B in the middle;

[0038] Figure 6 for Figure 4 Enlarged view of a section in the middle C;

[0039] Figure 7 The three-dimensional asphalt powder feeding device for dust prevention provided in the embodiments of this application Figure 2 ;

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Feeding box; 11. Receiving cavity; 12. Discharge channel; 13. Feeding channel; 131. Cutter clearance opening; 14. Cleaning port; 20. Bag cutting mechanism; 21. Cutter disc; 22. Second drive component; 30. First dustproof plate; 40. Second dustproof plate; 50. Material dropping mechanism; 51. Screen plate; 52. First drive component; 521. Drive motor; 522. Cam; 60. Screw conveyor; 61. Feeding pipe; 62. Discharge pipe; 621. First pipe fitting; 622. Second pipe fitting; 623. Corrugated connecting pipe; 70. First lifting component; 80. Cleaning mechanism; 81. Suspension cable; 82. Second lifting component. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0047] Please refer to the following: Figures 1 to 7 The dust-preventing asphalt powder feeding device provided in the embodiments of this application will now be described.

[0048] Please see Figure 1 , Figure 2 , Figure 3 and Figure 7This application provides a dust-preventing asphalt powder feeding device, including a feeding box 10, a bag-cutting mechanism 20, a first dustproof plate 30, a second dustproof plate 40, a material discharge mechanism 50, and a screw conveyor 60. The feeding box 10 has a receiving cavity 11, with a discharge channel 12 at the bottom of the receiving cavity 11. A feeding channel 13 is provided on one side of the receiving cavity 11, and a cleaning port 14 is provided on the other side. The feeding channel 13 is inclined downwards along the feeding direction, and a blade clearance opening 131 is provided at the bottom of the feeding channel 13. The bag-cutting mechanism 20 is located at the blade clearance opening 131 and has a blade extending into the feeding channel 13. The first dustproof plate 30 is movably located at the entrance of the feeding channel 13; the second dustproof plate 40 is movably located at... The material discharge mechanism includes a screen plate 51 horizontally disposed in the receiving cavity 11, and a first driving member 52 that drives the screen plate 51 to vibrate up and down. The screen plate 51 is located below the connection between the feeding channel 13 and the receiving cavity 11. The screw conveyor 60 is inclined up and down. The lower part of the screw conveyor 60 is the feeding end and has a feeding pipe 61 that communicates with the discharge channel 12. The upper part of the screw conveyor 60 is the discharge end and has a discharge pipe 62. The discharge pipe 62 is a flexible telescopic pipe that can extend and retract up and down.

[0049] Compared with the prior art, the beneficial effects of the dust-preventing asphalt powder feeding device provided in this application embodiment are:

[0050] The dust-proof asphalt powder feeding device provided in this embodiment includes a feeding box 10, a bag-cutting mechanism 20, a first dustproof plate 30, a second dustproof plate 40, a material discharge mechanism, and a screw conveyor 60. The feeding box 10 has a receiving cavity 11, a feeding channel 13, a discharging channel 12, and a cleaning port 14. During operation, bagged powder is fed into the receiving cavity 11 through the feeding channel 13. After passing through the bag-cutting mechanism 20, the packaging bag is ripped open, and then the ripped packaging bag falls onto the screen plate 51. The first driving member 52 drives the screen plate 51 to vibrate up and down, causing the powder to enter the screw conveyor 60 through the discharging channel 12 and the feeding pipe 61, and then be conveyed to the asphalt mixing equipment by the screw conveyor 60. During the up and down vibration of the screen plate 51, the first dustproof plate 30 and the second dustproof plate 40 are both in a sealed state to prevent dust from escaping. After the powder is discharged, the second dustproof plate 40 can be opened, and the empty packaging bag can be removed from the cleaning port 14.

[0051] This embodiment of the application, by setting a feeding box 10, a bag-cutting mechanism 20, and a material discharge mechanism at the feeding end of the screw conveyor 60, enables automatic bag opening of bagged powder, allowing the powder to enter the screw conveyor 60 through the discharge channel 12, and then be transported to the asphalt mixing equipment by the screw conveyor 60. This embodiment of the application can solve the dust problem caused by manual bag opening and dumping of powder. The first dustproof plate 30 and the second dustproof plate 40 can prevent dust from escaping from the feeding box 10. The flexible and retractable discharge pipe 62 is connected to the feeding end of the asphalt mixing equipment, which can prevent dust from escaping from the discharge pipe 62, thus solving the technical problem of dust generation during feeding and discharging of the feeder in the prior art.

[0052] The dust-proof asphalt powder feeding device provided in this application embodiment is suitable for raw materials used in asphalt mixture mixing such as color powder, rubber powder, and mineral powder. Of course, provided that the usage requirements are met, it can also be used for powder feeding and conveying in other fields.

[0053] The feed hopper 10 has a hollow box structure, with an internal cavity 11 for holding bagged powder. A discharge channel 12 is provided at the bottom of the feed hopper 10 for the unpacked powder to fall into the feed pipe 61 of the screw conveyor 60 below. A feed channel 13 is provided on one side wall of the feed hopper 10. During operation, the first dustproof plate 30 is first opened, then the bagged powder is fed into the feed channel 13, and then the first dustproof plate 30 is closed to prevent dust from spreading into the workshop. A cleaning port 14 is provided on the other side of the feed hopper 10 for removing empty packaging bags. Similar to the first dustproof plate 30, the second dustproof plate 40 is closed during operation and is only opened when it is necessary to remove the packaging bag.

[0054] The feed channel 13 and the cleaning port 14 can be located on opposite sides of the feed box 10, or on adjacent sides.

[0055] The first dustproof plate 30 and the second dustproof plate 40 can be fixed on the feed box 10 by magnetic attraction, hinge, screw connection, etc., and the opening or closing of the corresponding openings can be controlled. To improve the sealing performance, a sealing gasket or sealing ring can be provided on the side of the first dustproof plate 30 and the second dustproof plate 40 that is in contact with the feed box 10. The opening and closing of the first dustproof plate 30 and the second dustproof plate 40 can be controlled manually or by a drive mechanism.

[0056] In order to ensure that the bagged powder can fall smoothly onto the screen plate 51, the bottom support surface of the feed channel 13 is designed to be inclined downward (the specific inclination angle can be 15°-40°). During the downward movement along the inclination, the bagged powder passes through the bag cutting mechanism 20. The blade of the bag cutting mechanism 20 can cut a notch, and together with the screen plate 51 of the discharge mechanism, the powder can be discharged from the notch.

[0057] To reduce the resistance to the movement of bagged powder, the inner wall of the feed channel 13 should be relatively smooth. The feed channel 13 can be made of welded stainless steel plate. The bottom wall of the feed channel 13 can be equipped with rolling elements such as ball bearings or cylindrical rollers to reduce the resistance between the bagged powder and the feed channel 13.

[0058] The bag cutting mechanism 20 has a cutting edge that passes through the cutter clearance opening 131. The bag cutting mechanism 20 can be a fixed cutter or a cutter that can move along a set path, as long as it can successfully cut the packaging bag to obtain a cutting edge.

[0059] The feeding mechanism includes a horizontal sieve plate 51 and a first driving member 52. The shape and size of the sieve plate 51 are adapted to the horizontal cross-section of the receiving cavity 11, and can be square, round, etc. The sieve plate 51 has mesh holes for the powder to fall through. The first driving member 52 is used to drive the sieve plate 51 to move up and down. The first driving member 52 can be a vibrating motor or other power device capable of outputting up and down vibration. The sieve plate 51 is located below the connection between the feeding channel 13 and the receiving cavity 11. After passing through the bag cutting mechanism 20, the bagged powder can fall onto the sieve plate 51.

[0060] The screw conveyor 60 is inclined vertically. The feed pipe 61 of the screw conveyor 60 is connected to the discharge channel 12, and the discharge pipe 62 of the screw conveyor 60 is used to connect to the feed port of the asphalt mixing equipment. The feeding and discharging will not cause dust to spread, which can achieve the purpose of preventing dust from being generated in the workshop.

[0061] The feed pipe 61 and the discharge channel 12 can be connected by a rubber hose, which can reduce the vibration transmitted from the material discharge mechanism to the screw conveyor 60. The discharge pipe 62 is a flexible and expandable pipe, which can compensate for installation size errors and facilitate connection with asphalt mixing equipment.

[0062] Please see Figure 2 and Figure 4 In some possible embodiments, the connection between the discharge channel 12 and the receiving cavity 11 is funnel-shaped, which can collect the powder and allow the powder to enter the screw conveyor 60 through the feed pipe 61.

[0063] Please see Figure 2 In some possible embodiments, the bag-cutting mechanism 20 includes a cutter disc 21 and a second drive member 22. The cutter disc 21 is located at the cutter clearance opening 131, and the outer peripheral edge of the cutter disc 21 forms a cutting edge; the second drive member 22 is located in the feed channel 13 and is used to drive the cutter disc 21 to rotate around its own horizontal axis. The second drive member 22 can be a motor, which drives the cutter disc 21 to rotate at high speed to cut notches in the packaging bags of bagged powder.

[0064] Please see Figure 2In some possible embodiments, multiple cutter discs 21 are spaced apart in the horizontal direction, and the multiple cutter discs 21 are coaxially connected. The second drive member 22 is used to drive the multiple cutter discs 21 to rotate synchronously, which can cut multiple notches on the packaging bag and increase the speed of dust discharge.

[0065] Please see Figure 4 In some possible embodiments, multiple material feeding mechanisms are provided at intervals along the circumference of the feed box 10. The multiple material feeding mechanisms can be arranged at equal intervals or at unequal intervals. The multiple material feeding mechanisms operate synchronously, so that the screen plate 51 vibrates more evenly.

[0066] Please see Figure 4 and Figure 5 In some possible embodiments, the first driving component 52 is a drive motor 521, which is located on the side wall of the feed box 10. The motor shaft of the drive motor 521 is connected to a cam 522, which is located below the screen plate 51. The outer peripheral surface of the cam 522 abuts against the screen plate 51. The frame of the screen plate 51 is supported on the cam 522. The drive motor 521 drives the cam 522 to rotate, and the cam 522 pushes the screen plate 51 to vibrate up and down.

[0067] It should be noted that, in addition to the support provided by the cam 522, a support boss can also be provided on the inner wall of the receiving cavity to provide auxiliary support for the screen plate 51 and improve stability. The support height of the support boss should be lower than the maximum support height of the cam 522 and greater than the minimum support height of the cam 522, that is, the support boss should not affect the cam 522 from lifting the screen plate 51.

[0068] Please see Figure 2 and Figure 3 In some possible embodiments, the side wall of the feed box 10 with the cleaning port 14 is provided with a chute, which extends in the vertical direction, and the second dustproof plate 40 is slidably fitted in the chute; the dust-proof asphalt powder feeding device also includes a first lifting member 70, which is provided in the feed box 10 and is used to drive the second dustproof plate 40 to move along the chute.

[0069] The first lifting component 70 can be a vertically arranged electric telescopic rod or pneumatic push rod, with the telescopic end of the electric telescopic rod or pneumatic push rod connected to the second dustproof plate 40. Alternatively, the first lifting component 70 can also be a rack driven by a motor and gears, with the rack connected to the second dustproof plate 40.

[0070] Please see Figure 2 and Figure 5In some possible embodiments, the dust-preventing asphalt powder feeding device further includes a cleaning mechanism 80, which includes four suspension cables 81 and two second lifting members 82. The four suspension cables 81 are respectively connected to the four corners of the screen plate 51, and the lower ends of the suspension cables 81 are connected to the screen plate 51. The upper ends of the two suspension cables 81 adjacent to the cleaning port 14 are connected to the top wall of the receiving cavity 11. The two second lifting members 82 are located on the top of the feeding box 10, and the two second lifting members 82 are respectively connected to the upper ends of the two suspension cables 81 away from the cleaning port 14.

[0071] In this embodiment, the ropes can be steel wire ropes or nylon ropes. When the sieve plate 51 is horizontal, the four ropes maintain the same length. After all the powder in the packaging bag is discharged, the second lifting component 82 can be controlled to rise, and the suspension cable 81 drives one side of the sieve plate 51 to rise, so that the sieve plate 51 is in an inclined position. The second dustproof plate 40 opens, and the empty packaging bag slides out of the cleaning port 14 along the inclined sieve plate 51.

[0072] It should be noted that there should be a dimensional allowance between the sieve plate 51 and the inner wall of the receiving cavity 11 so that the sieve plate 51 will not interfere with the inner wall of the receiving cavity 11 when tilted.

[0073] In addition to the implementation of the cleaning mechanism 80 described above, an electric push rod can also be provided on one side of the feed box 10. The telescopic end of the electric push rod is higher than the sieve plate 51 and faces the cleaning port 14. After the powder is discharged, the telescopic end of the electric push rod extends, pushing the packaging bag out of the cleaning port 14, and then the electric push rod returns to its original position.

[0074] Understandably, to help operators understand whether the powder has been emptied from the packaging bag, a transparent observation window can be installed on the side wall of the feed hopper, allowing them to visually check if any powder is still falling from the bag. Alternatively, a weighing sensor can be used to detect the weight; once the weight reaches a set value, it indicates that the powder has been emptied, and the packaging bag can be removed from the feed hopper.

[0075] The load cell can be mounted on the sieve plate or on a cam below the sieve plate. Existing products on the market can be used as load cells, and there are no restrictions on their specific specifications or models.

[0076] Please see Figure 1 , Figure 6 and Figure 7In some possible embodiments, the discharge pipe 62 includes a first pipe fitting 621, a second pipe fitting 622, and a corrugated connecting pipe 623. The first pipe fitting 621 is arranged vertically, and its upper end is connected to the screw conveyor 60; the second pipe fitting 622 is arranged vertically and located below the first pipe fitting 621, and its lower end is provided with a flange mounting plate; the corrugated connecting pipe 623 is arranged vertically, with its upper end sleeved on the first pipe fitting 621 and its lower end sleeved on the second pipe fitting 622.

[0077] In this embodiment, the discharge pipe 62 is a flexible connecting pipe, which can compensate for the vertical and horizontal installation dimensional errors of the asphalt mixing equipment and the drop-off conveyor to a certain extent, and avoid dust leakage caused by gaps after installation. The first pipe fitting 621 is fixed on the screw conveyor 60, and the second pipe fitting 622 is used to connect to the feed inlet of the asphalt mixing equipment. A corrugated connecting pipe 623 is provided between the first pipe fitting 621 and the second pipe fitting 622 to prevent dust from spreading to the outside workshop.

[0078] Please see Figure 6 In some possible embodiments, the outer diameter of the first pipe 621 is smaller than the inner diameter of the second pipe 622, and the lower end of the first pipe 621 extends into the second pipe 622. Compared with the method where there is a gap between the first pipe 621 and the second pipe 622, the powder falling from the first pipe 621 can directly enter the second pipe 622, which can prevent the falling powder from scouring the inner wall of the corrugated connecting pipe 623, and the corrugated connecting pipe 623 is not easily damaged after long-term use.

[0079] The two ends of the corrugated connecting pipe 623 can be connected to the first pipe fitting 621 and the second pipe fitting 622 through pipe clamps, making it easy to disassemble and replace when the corrugated connecting pipe 623 is damaged.

[0080] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust-preventing asphalt powder feeding device, characterized in that, include: The feeding box (10) has a receiving cavity (11), and a discharge channel (12) is provided at the bottom of the receiving cavity (11). A feeding channel (13) is provided on one side of the receiving cavity (11), and a cleaning port (14) is provided on the other side. The feeding channel (13) is inclined downward along the feeding direction, and a tool clearance port (131) is provided at the bottom of the feeding channel (13). The bag cutting mechanism (20) is located in the cutter clearance opening (131) and has a cutting edge extending into the feed channel (13); The first dustproof plate (30) is movably disposed at the entrance of the feed channel (13); The second dustproof plate (40) is movably disposed at the cleaning port (14); The feeding mechanism (50) includes a screen plate (51) horizontally disposed within the receiving cavity (11), and a first driving member (52) for driving the screen plate (51) to vibrate up and down. The screen plate (51) is located below the connection between the feeding channel (13) and the receiving cavity (11). The screw conveyor (60) is inclined vertically. The lower part of the screw conveyor (60) is the feed end and has a feed pipe (61) that communicates with the discharge channel (12). The upper part of the screw conveyor (60) is the discharge end and has a discharge pipe (62).

2. The dust-preventing asphalt powder feeding device according to claim 1, characterized in that, The connection between the discharge channel (12) and the receiving cavity (11) is funnel-shaped.

3. The dust-preventing asphalt powder feeding device according to claim 1, characterized in that, The bag-cutting mechanism (20) includes: A cutter head (21) is disposed at the cutter clearance opening (131), and the cutting edge is formed on the outer peripheral edge of the cutter head (21); and The second driving member (22) is located in the feed channel (13) and is used to drive the cutter head (21) to rotate around its own horizontal axis.

4. The dust-preventing asphalt powder feeding device according to claim 3, characterized in that, The cutter heads (21) are arranged at intervals along the horizontal direction, and the multiple cutter heads (21) are coaxially connected.

5. The dust-preventing asphalt powder feeding device according to claim 1, characterized in that, The material feeding mechanism (50) is provided in multiple circumferentially spaced along the feed box (10).

6. The dust-preventing asphalt powder feeding device according to claim 1 or 5, characterized in that, The first driving component (52) is a drive motor (521). The drive motor (521) is located on the side wall of the feed box (10). The motor shaft of the drive motor (521) is connected to a cam (522). The cam (522) is located below the screen plate (51). The outer peripheral surface of the cam (522) abuts against the screen plate (51).

7. The dust-preventing asphalt powder feeding device according to claim 1, characterized in that, The feed box (10) has a groove on the side wall where the cleaning port (14) is located. The groove extends in the vertical direction, and the second dustproof plate (40) is slidably fitted into the groove. The dust-proof asphalt powder feeding device also includes a first lifting component (70), which is located in the feed box (10) and is used to drive the second dustproof plate (40) to move along the chute.

8. The dust-preventing asphalt powder feeding device according to claim 7, characterized in that, The dust-prevention asphalt powder feeding device further includes a cleaning mechanism (80), which includes: Four suspension cables (81) are respectively connected to the four corners of the sieve plate (51), with the lower end of each suspension cable (81) connected to the sieve plate (51). The upper ends of the two suspension cables (81) adjacent to the cleaning port (14) are connected to the top wall of the receiving cavity (11). Two second lifting components (82) are located on the top of the feed box (10), and the two second lifting components (82) are respectively connected to the upper ends of the two suspension cables (81) that are far away from the cleaning port (14).

9. The dust-preventing asphalt powder feeding device according to claim 1, characterized in that, The discharge pipe (62) includes: The first pipe fitting (621) is arranged vertically, and the upper end of the first pipe fitting (621) is connected to the screw conveyor (60); A second pipe fitting (622) is vertically arranged and located below the first pipe fitting (621), and a flange mounting plate is provided at the lower end of the second pipe fitting (622); and A corrugated connecting pipe (623) is arranged vertically, with its upper end sleeved on the first pipe fitting (621) and its lower end sleeved on the second pipe fitting (622).

10. The dust-preventing asphalt powder feeding device according to claim 9, characterized in that, The outer diameter of the first pipe fitting (621) is smaller than the inner diameter of the second pipe fitting (622), and the lower end of the first pipe fitting (621) extends into the second pipe fitting (622).

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