A dust-removing asphalt pavement milling material crushing and circulating screening device

Abstract

The present invention relates to a dust-removing asphalt pavement milling material crushing and circulating screening device, wherein the lower end of the first conveyor belt is located below the hopper outlet, the upper end of the first conveyor belt is located above the multi-stage vibrating screen feed port, the multi-stage vibrating screen has an outlet and a discharge port, the outlet of the multi-stage vibrating screen is connected to the feed port of the crusher, the discharge port of the multi-stage vibrating screen is located above the third conveyor belt, the discharge port of the crusher is located above the fourth conveyor belt, the fourth conveyor belt is located above the fifth conveyor belt, and the fifth conveyor belt is located above the feed port of the multi-stage vibrating screen. The present invention performs screening operations before entering the crusher, and screens out asphalt milling materials with appropriate particle sizes, thereby reducing the number of asphalt milling material screens entering the crusher; after the crusher is crushed, the asphalt milling material screens crushed by the fourth conveyor belt and the fifth conveyor belt are re-sent to the multi-stage vibrating screen for screening, thereby ensuring that all asphalt milling materials are crushed into appropriate sizes.

Description

Technical Field

[0001] The invention relates to the field of asphalt pavement milling material recovery, in particular to a dust-removing asphalt pavement milling material crushing circulation screening device. Background Art

[0002] During construction, the old road surface will generate a large amount of asphalt pavement milling materials. Random stacking or discarding will not only occupy land, but also cause environmental pollution. At the same time, the stone and asphalt resources in the waste will also cause a lot of waste.

[0003] Therefore, recycling and reusing asphalt pavement milling materials can save a large amount of asphalt and gravel materials, save engineering costs, reduce environmental pollution, and avoid the treatment of asphalt road waste. The economic and environmental benefits are very outstanding.

[0004] The method for handling asphalt waste is: dig up the aged waste → transport it to the recycling plant → crush and screen the waste → mix it with an appropriate amount of new asphalt, new aggregate, etc. → make new asphalt materials, mainly used for paving road base or the layer below the surface, etc.

[0005] In the crushing and screening process of asphalt pavement milling materials, a large amount of dust will be generated, which will cause great pollution to the air and cause great harm to the health of the staff working nearby. The current crushing and screening equipment often only installs a fog cannon nearby to remove dust, but the dust removal effect is not ideal. Summary of the invention

[0006] The present invention aims to solve the above-mentioned problem and provides a dust-removing asphalt pavement milling material crushing circulation screening device, which solves the problem that the dust removal effect of the current crushing and screening equipment is not ideal.

[0007] A dust-removing asphalt pavement milling material crushing and circulating screening device comprises: a hopper, a first conveyor belt, a multi-stage vibrating screen, a crusher, a fourth conveyor belt and a fifth conveyor belt, wherein the lower end of the first conveyor belt is located below the hopper outlet, the upper end of the first conveyor belt is located above the multi-stage vibrating screen feed port, the multi-stage vibrating screen has an outlet and a discharge port, the outlet of the multi-stage vibrating screen is connected to the feed port of the crusher, the discharge port of the multi-stage vibrating screen is located above the third conveyor belt, the discharge port of the crusher is located above the fourth conveyor belt, the fourth conveyor belt is located above the fifth conveyor belt, and the fifth conveyor belt is located above the feed port of the multi-stage vibrating screen.

[0008] Based on the above technical solution, it also includes a first nozzle and a discharge valve. An edge is formed above the hopper. The first nozzle is located inside the edge and fixedly connected to the edge. The lower part of the hopper outlet is fixedly connected to the discharge valve and communicates with the discharge valve.

[0009] Based on the above technical solution, it also includes a conical protective plate and a fixed rod, wherein the conical protective plate is located above the discharge valve, the conical protective plate is located inside the hopper, and the two ends of the fixed rod are respectively fixedly connected to the inner wall of the hopper and the conical protective plate.

[0010] On the basis of the above technical solution, it also includes a first return water tank and a first return water pipe. The first return water tank is located below the discharge valve and the first conveyor belt. The first return water tank is fixedly connected to the first return water pipe. The first return water pipe is connected to the sewage treatment device. The sewage treatment device is connected to the water inlet of the water pump. The water outlet of the water pump is connected to the first nozzle.

[0011] On the basis of the above technical solution, a funnel and a material frame, wherein the funnel is located below the discharge port of the multi-stage vibrating screen and is fixedly connected to the multi-stage vibrating screen, and the material frame is located below the third conveyor belt;

[0012] Also included is a fog cannon, which is located on the side of the hopper.

[0013] Based on the above technical solution, the crusher includes a crusher shell, a screen plate, a transmission shaft, a rotor disk, a hammer head and an impact plate. The crusher shell is fixedly connected to the screen plate at the bottom, the transmission shaft passes through the crusher shell and is rotatably connected to the crusher shell, the rotor disk is fixedly connected to the transmission shaft, the hammer head is rotatably connected to the rotor disk, and the impact plate is fixedly connected to the inside of the crusher shell.

[0014] On the basis of the above technical solution, it also includes a rotary joint and a water pipe, the transmission shaft is formed with an axial shaft inner cavity, the transmission shaft is radially formed with a stepped hole, the stepped hole is connected with the shaft inner cavity, the rotor disk is radially formed with a through hole, the water pipe passes through the through hole and penetrates into the stepped hole, the water pipe is fixedly connected with the transmission shaft and the rotor disk, and the rotary joint is connected with the shaft inner cavity;

[0015] The utility model also comprises a second nozzle, wherein the second nozzle is threadedly connected with the water pipe.

[0016] Based on the above technical solution, the crusher is a jaw crusher, a toothed roller crusher or a hammer crusher.

[0017] On the basis of the above technical solution, it also includes a baffle and a spring, wherein the baffle is located at the feed port of the crusher, the baffle is rotatably connected to the crusher housing, and the spring is connected to the baffle and drives the baffle to rotate outward;

[0018] It also includes a second return water pool, which is located below the fourth conveyor belt. The fourth conveyor belt is connected to a sewage treatment device, the sewage treatment device is connected to the water inlet of the water pump, and the water outlet of the water pump is connected to a rotary joint.

[0019] Based on the above technical solution, asphalt dispersant is added to the water sprayed out of the water pipe.

[0020] The asphalt dispersant is any one of 12-hydroxystearic acid, ε-caprolactone, polyethylene polyamine, N,N-dimethylaminopropylamine, octadecylaminopropylamine, diethylethanolamine, polycaprolactone-polyol-polyethyleneimine block copolymer, alkylphenol polyoxyethylene ether, modified branched alcohol ether ethoxylate, polyacrylamide, methylpentanol, cellulose derivatives and sodium dodecyl sulfate, or a mixture of more than one of them.

[0021] Dispersants make the various components of asphalt milling material well dispersed with each other, so as to facilitate crushing and place the asphalt sticking crusher.

[0022] The present invention has the following advantages:

[0023] 1. Screening is performed before entering the crusher to screen out the asphalt milling material with suitable particle size, thus reducing the number of asphalt milling material screens entering the crusher;

[0024] 2. After the crusher is broken, the asphalt milling material screens after the fourth and fifth conveyor belts are sent back to the multi-stage vibrating screen for screening to ensure that all the asphalt milling materials are broken into appropriate sizes;

[0025] 3. The water pool in the hopper completely soaks the surface of the asphalt milling material, thereby reducing the diffusion of dust into the air during subsequent transportation, screening and crushing;

[0026] 4. The water pipe sprays water in the crusher to settle the dust generated during the crushing process, reducing the dust overflowing from the crusher;

[0027] 5. The water sprayed from the water pipe inside the crusher absorbs the heat of the crusher and the asphalt milling material, reduces the temperature of the crusher and the asphalt milling material, and prevents the asphalt milling material from being softened by heat during the crushing process;

[0028] 6. The water pipe is respectively interference fit with the rotor disc and the transmission shaft, thereby fixing the rotor disc and the transmission shaft, making the force between the rotor disc and the transmission shaft more uniform, and at the same time eliminating the need for a key connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0030] Figure 1 : A schematic diagram of the top view of the structure of the present invention;

[0031] Figure 2 : Schematic diagram of the main cross-sectional structure of the hopper;

[0032] Figure 3 : A schematic diagram of the main structure of a multi-stage vibrating screen and a crusher (toothed roller crusher);

[0033] Figure 4 : A schematic diagram of the main structure of a multi-stage vibrating screen and a crusher (hammer crusher);

[0034] Figure 5 : A schematic diagram of the side cross-sectional structure of a crusher;

[0035] Figure 6 : Schematic diagram of the main cross-sectional structure of the crusher;

[0036] Figure 7 : Figure 6 Schematic diagram of the local enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and examples:

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] Embodiment 1:

[0042] like Figures 1 to 7As shown, this embodiment provides a dust-removing asphalt pavement milling material crushing and circulating screening device, including: a hopper 1, a first conveyor belt 2, a multi-stage vibrating screen 4, a crusher 5, a fourth conveyor belt 6 and a fifth conveyor belt 7, the lower end of the first conveyor belt 2 is located below the outlet of the hopper 1, the upper end of the first conveyor belt 2 is located above the feed port of the multi-stage vibrating screen 4, the multi-stage vibrating screen 4 has an outlet and a discharge port, the outlet of the multi-stage vibrating screen 4 is connected to the feed port of the crusher 5, the discharge port of the multi-stage vibrating screen 4 is located above the third conveyor belt 42, the discharge port of the crusher 5 is located above the fourth conveyor belt 6, the fourth conveyor belt 6 is located above the fifth conveyor belt 7, and the fifth conveyor belt 7 is located above the feed port of the multi-stage vibrating screen 4.

[0043] On the basis of the above technical solution, it also includes a first nozzle 12 and a discharge valve 13. An edge 11 is formed above the hopper 1. The first nozzle 12 is located inside the edge 11 and is fixedly connected to the edge 11. The lower part of the hopper 1 outlet is fixedly connected to the discharge valve 13 and communicates with the discharge valve 13.

[0044] On the basis of the above technical solution, it also includes a conical protective plate 14 and a fixed rod 15, wherein the conical protective plate 14 is located above the discharge valve 13, the conical protective plate 14 is located inside the hopper 1, and the two ends of the fixed rod 15 are fixedly connected to the inner wall of the hopper 1 and the conical protective plate 14 respectively.

[0045] On the basis of the above technical scheme, it also includes a first return water tank 3 and a first return water pipe 31. The first return water tank 3 is located below the discharge valve 13 and the first conveyor belt 2. The first return water tank 3 is fixedly connected to the first return water pipe 31. The first return water pipe 31 is connected to the sewage treatment device 10. The sewage treatment device 10 is connected to the water inlet of the water pump 16. The water outlet of the water pump 16 is connected to the first nozzle 12.

[0046] On the basis of the above technical solution, a funnel 41 and a material frame 43, wherein the funnel 41 is located below the discharge port of the multi-stage vibrating screen 4 and is fixedly connected to the multi-stage vibrating screen 4, and the material frame 43 is located below the third conveyor belt 42;

[0047] It also includes a fog cannon 8, which is located on the side of the hopper 1.

[0048] Based on the above technical solution, asphalt dispersant is added to the water sprayed out from the water pipe 57 .

[0049] The asphalt dispersant is any one of 12-hydroxystearic acid, ε-caprolactone, polyethylene polyamine, N,N-dimethylaminopropylamine, octadecylaminopropylamine, diethylethanolamine, polycaprolactone-polyol-polyethyleneimine block copolymer, alkylphenol polyoxyethylene ether, modified branched alcohol ether ethoxylate, polyacrylamide, methylpentanol, cellulose derivatives and sodium dodecyl sulfate, or a mixture of more than one of them.

[0050] Working principle:

[0051] Before the asphalt milling material is put into the hopper 1, the first nozzle 12 in the peripheral edge 11 sprays a water curtain to cover the upper opening of the hopper 1, and the fog cannon 8 sprays water mist to cover the upper opening of the hopper 1. The water mist is located above the water curtain, and the water mist can intercept dust with smaller particle sizes.

[0052] A dump truck or other vehicle loaded with milling material throws the asphalt milling material into the hopper 1 from above the hopper 1, and the asphalt milling material passes through the water mist and the water curtain in turn, so that part of the surface of the asphalt milling material is wetted by water. After that, the asphalt milling material continues to fall into the water pool at the bottom of the hopper 1, so that the surface of the asphalt milling material is completely soaked in water. There is water at the bottom of the hopper 1, and the water source is the falling water curtain. During the dumping process, the dust of the asphalt milling material will contact and settle with the water mist and the water curtain.

[0053] The discharge valve 13 works to gradually transport the asphalt milling material downward. While transporting the asphalt milling material, water will also flow out of the discharge valve 13 into the first return water tank 3, thereby maintaining the balance of the water level at the bottom of the hopper 1.

[0054] After leaving the discharge valve 13, the asphalt milling material falls into the lower end of the first conveyor belt 2. The first conveyor belt 2 drives the asphalt milling material to move upward to the top of the multi-stage vibrating screen 4, and then the asphalt milling material falls into the multi-stage vibrating screen 4. During the vibration process, the multi-stage vibrating screen 4 discharges the asphalt milling material from different discharge ports according to the size of the particle size, and the asphalt milling material with too large a particle size is discharged from the outlet to the crusher 5. The asphalt milling material discharged from the discharge port falls into the third conveyor belt 42 through the funnel 41, and is driven by the third conveyor belt 42 into the material frame 43.

[0055] Asphalt milling materials with too large particle sizes fall into the crusher 5 from the feed port of the crusher 5 and are crushed by the hammer head 55 in the crusher 5 .

[0056] The crushed asphalt milling material falls from the screen plate 52 onto the fourth conveyor belt 6, and the fourth conveyor belt 6 drives the crushed asphalt milling material to the fifth conveyor belt 7. The fifth conveyor belt 7 drives the crushed asphalt milling material to the top of the feed port of the multi-stage vibrating screen 4 for secondary screening.

[0057] Embodiment 2:

[0058] like Figure 1 , Figure 2 , Figures 4 to 7 As shown, this embodiment provides a dust-removing asphalt pavement milling material crushing and circulating screening device, including: a hopper 1, a first conveyor belt 2, a multi-stage vibrating screen 4, a crusher 5, a fourth conveyor belt 6 and a fifth conveyor belt 7, the lower end of the first conveyor belt 2 is located below the outlet of the hopper 1, the upper end of the first conveyor belt 2 is located above the feed port of the multi-stage vibrating screen 4, the multi-stage vibrating screen 4 has an outlet and a discharge port (the outlet is the outlet for milling materials whose particle size is too large and does not meet the requirements, and the discharge port is the outlet for milling materials whose particle size meets the requirements), the outlet of the multi-stage vibrating screen 4 is connected to the feed port of the crusher 5, the discharge port of the multi-stage vibrating screen 4 is located above the third conveyor belt 42, the discharge port of the crusher 5 is located above the fourth conveyor belt 6, the fourth conveyor belt 6 is located above the fifth conveyor belt 7, and the fifth conveyor belt 7 is located above the feed port of the multi-stage vibrating screen 4. A funnel (not shown in the figure) for the milling material to pass through is arranged between the fourth conveyor belt 6 and the fifth conveyor belt 7 , so as to prevent the milling material from not falling onto the fifth conveyor belt 7 .

[0059] On the basis of the above technical solution, it further includes a first nozzle 12 and a discharge valve 13, an edge 11 is formed above the hopper 1, the first nozzle 12 is located inside the edge 11 and is fixedly connected to the edge 11, a water pipe of the first nozzle 12 passes through the edge 11 and is connected to a pressure water source, and the lower part of the outlet of the hopper 1 is fixedly connected to the discharge valve 13 and communicates with the discharge valve 13. Preferably, the discharge valve 13 is a star-shaped discharge valve.

[0060] On the basis of the above technical solution, it also includes a conical protective plate 14 and a fixed rod 15, the conical protective plate 14 is located above the discharge valve 13, the conical protective plate 14 is located inside the hopper 1, and the two ends of the fixed rod 15 are respectively fixedly connected to the inner wall of the hopper 1 and the conical protective plate 14. The fixed rod 15 has a space for the milling material to pass through.

[0061] On the basis of the above technical scheme, it also includes a first return water tank 3 and a first return water pipe 31. The first return water tank 3 is located below the discharge valve 13 and the first conveyor belt 2. The first return water tank 3 is fixedly connected to the first return water pipe 31. The first return water pipe 31 is connected to the sewage treatment device 10. The sewage treatment device 10 is connected to the water inlet of the water pump 16. The water outlet of the water pump 16 is connected to the first nozzle 12.

[0062] On the basis of the above technical solution, a funnel 41 and a material frame 43 are provided, wherein the funnel 41 is located below the discharge port of the multi-stage vibrating screen 4 and is fixedly connected to the multi-stage vibrating screen 4, and the material frame 43 is located below the third conveyor belt 42. Preferably, the multi-stage vibrating screen 4 has a plurality of discharge ports, and the particle size of the milling material at each discharge port is different.

[0063] On the basis of the above technical scheme, the crusher 5 is a hammer crusher, which includes a crusher housing 51, a screen plate 52, a transmission shaft 53, a rotor disc 54, a hammer head 55 and an impact plate 56. The crusher housing 51 is fixedly connected to the screen plate 52 at the bottom, the transmission shaft 53 passes through the crusher housing 51 and is rotatably connected to the crusher housing 51, the rotor disc 54 is fixedly connected to the transmission shaft 53, the hammer head 55 is rotatably connected to the rotor disc 54, and the impact plate 56 is fixedly connected to the inside of the crusher housing 51.

[0064] It also includes a motor (not shown in the figure) and a driven wheel 59. The motor drives the driving wheel (not shown in the figure) to rotate. The driving wheel drives the driven wheel 59 to rotate through a belt. The driven wheel 59 is fixedly connected to the transmission shaft 53 and thus drives the transmission shaft 53 to rotate.

[0065] On the basis of the above technical solution, a rotary joint 50 and a water pipe 57 are further included. An axial shaft inner cavity 530 is formed inside the transmission shaft 53. A stepped hole 531 is formed radially on the transmission shaft 53. The stepped hole 531 is connected to the shaft inner cavity 530. A through hole 540 is formed radially on the rotor disk 54. The water pipe 57 passes through the through hole 540 and enters the stepped hole 531. The water pipe 57 is fixedly connected to the transmission shaft 53 and the rotor disk 54. The rotary joint 50 is connected to the shaft inner cavity 530. The water pipe 57 is a steel round pipe.

[0066] Based on the above technical solution, a second nozzle 571 is further included, and the second nozzle 571 is threadedly connected to the water pipe 57. The water droplets sprayed by the second nozzle 571 are smaller or water mist is sprayed.

[0067] On the basis of the above technical solution, it also includes a baffle 58 and a spring 581, the baffle 58 is located at the feed port of the crusher 5, the baffle 58 is rotatably connected to the crusher housing 51, and the spring 581 is connected to the baffle 58 and drives the baffle 58 to rotate outward. The baffle 58 has two functions, one is to prevent the asphalt milling material from directly hitting the internal structure of the crusher 5, and the other is to shield the dust generated inside the crusher 5 during crushing, thereby reducing the dust from spilling outward.

[0068] On the basis of the above technical solution, a fog cannon 8 is further included, and the fog cannon 8 is located on the side of the hopper 1. Preferably, the fog cannon 8 is located above the hopper 1 and is fixedly connected to the hopper 1.

[0069] On the basis of the above technical solution, it also includes a second return water tank 9, which is located below the fourth conveyor belt 6. The fourth conveyor belt 6 is connected to the sewage treatment device 10, and the sewage treatment device 10 is connected to the water inlet of the water pump 16. The water outlet of the water pump 16 is connected to the rotary joint 50.

[0070] Based on the above technical solution, asphalt dispersant can be added to the water sprayed from the water pipe 57. The asphalt dispersant can be added to the water inlet of the water pump 16 or the return water tank.

[0071] The asphalt dispersant is any one of 12-hydroxystearic acid, ε-caprolactone, polyethylene polyamine, N,N-dimethylaminopropylamine, octadecylaminopropylamine, diethylethanolamine, polycaprolactone-polyol-polyethyleneimine block copolymer, alkylphenol polyoxyethylene ether, modified branched alcohol ether ethoxylate, polyacrylamide, methylpentanol, cellulose derivatives and sodium dodecyl sulfate, or a mixture of more than one of them.

[0072] Working principle:

[0073] Before the asphalt milling material is put into the hopper 1, the first nozzle 12 in the peripheral edge 11 sprays a water curtain to cover the upper opening of the hopper 1, and the fog cannon 8 sprays water mist to cover the upper opening of the hopper 1. The water mist is located above the water curtain, and the water mist can intercept dust with smaller particle sizes.

[0074] A dump truck or other vehicle loaded with milling material throws the asphalt milling material into the hopper 1 from above the hopper 1, and the asphalt milling material passes through the water mist and the water curtain in turn, so that part of the surface of the asphalt milling material is wetted by water. After that, the asphalt milling material continues to fall into the water pool at the bottom of the hopper 1, so that the surface of the asphalt milling material is completely soaked in water. There is water at the bottom of the hopper 1, and the water source is the falling water curtain. During the dumping process, the dust of the asphalt milling material will contact and settle with the water mist and the water curtain.

[0075] The discharge valve 13 works to gradually transport the asphalt milling material downward. While transporting the asphalt milling material, water will also flow out of the discharge valve 13 into the first return water tank 3, thereby maintaining the balance of the water level at the bottom of the hopper 1.

[0076] After leaving the discharge valve 13, the asphalt milling material falls into the lower end of the first conveyor belt 2. The first conveyor belt 2 drives the asphalt milling material to move upward to the top of the multi-stage vibrating screen 4, and then the asphalt milling material falls into the multi-stage vibrating screen 4. During the vibration process, the multi-stage vibrating screen 4 discharges the asphalt milling material from different discharge ports according to the size of the particle size, and the asphalt milling material with too large a particle size is discharged from the outlet to the crusher 5. The asphalt milling material discharged from the discharge port falls into the third conveyor belt 42 through the funnel 41, and is driven by the third conveyor belt 42 into the material frame 43.

[0077] Asphalt milling material with too large particle size falls into the crusher 5 from the feed port of the crusher 5 and is crushed by the hammer 55 in the crusher 5. During the crushing process, pressurized water enters the shaft cavity 530 through the rotary joint 50, and the water is sprayed out from the shaft cavity 530 through the water pipe 57.

[0078] There is residual water on the surface of the asphalt milling material, and when it is crushed, the water sprayed from the water pipe 57 will contact the crushing surface, thereby reducing the diffusion of dust generated by the crushing into the air.

[0079] The crushed asphalt milling material falls from the screen plate 52 onto the fourth conveyor belt 6, and the fourth conveyor belt 6 drives the crushed asphalt milling material to the fifth conveyor belt 7. The fifth conveyor belt 7 drives the crushed asphalt milling material to the top of the feed port of the multi-stage vibrating screen 4 for secondary screening.

[0080] The water in the first return water tank 3 and the second return water tank 9 is reused after being filtered and treated by the sewage treatment device 10. The water inlet of the water pump 16 is connected to the water supply network at the same time to replenish water into the device.

[0081] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A dust removal asphalt pavement milling material crushing circulation screening device, characterized in that: include: A hopper (1), a first conveyor belt (2), a multi-stage vibrating screen (4), a crusher (5), a fourth conveyor belt (6) and a fifth conveyor belt (7), wherein the lower end of the first conveyor belt (2) is located below the outlet of the hopper (1), the upper end of the first conveyor belt (2) is located above the feed port of the multi-stage vibrating screen (4), the multi-stage vibrating screen (4) has an outlet and a discharge port, the outlet of the multi-stage vibrating screen (4) is connected to the feed port of the crusher (5), the discharge port of the multi-stage vibrating screen (4) is located above the third conveyor belt (42), the discharge port of the crusher (5) is located above the fourth conveyor belt (6), the fourth conveyor belt (6) is located above the fifth conveyor belt (7), and the fifth conveyor belt (7) is located above the feed port of the multi-stage vibrating screen (4); It also includes a first nozzle (12), an edge (11) is formed above the hopper (1), and the first nozzle (12) is located inside the edge (11) and is fixedly connected to the edge (11); It also includes a fog cannon (8), wherein the fog cannon (8) is located on the side of the hopper (1); The first nozzle (12) sprays a water curtain, and the fog cannon (8) sprays water mist, and the water mist is located above the water curtain; The first nozzle (12) in the four peripheral edges (11) sprays a water curtain to cover the upper opening of the hopper (1), and the fog cannon (8) sprays water mist to cover the upper opening of the hopper (1); The crusher (5) comprises a crusher housing (51), a screen plate (52), a transmission shaft (53), a rotor disc (54), a hammer head (55) and an impact plate (56); the crusher housing (51) is fixedly connected to the screen plate (52) at the bottom; the transmission shaft (53) passes through the crusher housing (51) and is rotationally connected to the crusher housing (51); the rotor disc (54) is fixedly connected to the transmission shaft (53); the hammer head (55) is rotationally connected to the rotor disc (54); and the impact plate (56) is fixedly connected to the inside of the crusher housing (51); It also includes a rotary joint (50) and a water pipe (57), wherein an axial shaft inner cavity (530) is formed inside the transmission shaft (53), a stepped hole (531) is formed radially on the transmission shaft (53), the stepped hole (531) is communicated with the shaft inner cavity (530), a through hole (540) is formed radially on the rotor disk (54), the water pipe (57) passes through the through hole (540) and penetrates into the stepped hole (531), the water pipe (57) is fixedly connected to the transmission shaft (53) and the rotor disk (54), and the rotary joint (50) is communicated with the shaft inner cavity (530); It also includes a second nozzle (571), wherein the second nozzle (571) is threadedly connected to the water pipe (57); The water sprayed out from the water pipe (57) is added with an asphalt dispersant; During the crushing process, pressurized water enters the shaft inner cavity (530) through the rotary joint (50), and the water is ejected outward from the shaft inner cavity (530) through the water pipe (57); It also includes a first nozzle (12) and a discharge valve (13), wherein the lower portion of the outlet of the hopper (1) is fixedly connected to the discharge valve (13) and communicates with the discharge valve (13); It also includes a first water return pool (3) and a first water return pipe (31), the first water return pool (3) being located below the discharge valve (13) and the first conveyor belt (2), the first water return pool (3) being fixedly connected to the first water return pipe (31), the first water return pipe (31) being connected to the sewage treatment device (10), the sewage treatment device (10) being connected to the water inlet of the water pump (16), and the water outlet of the water pump (16) being connected to the first nozzle (12); It also includes a baffle (58) and a spring (581), wherein the baffle (58) is located at the feed port of the crusher (5), the baffle (58) is rotatably connected to the crusher housing (51), and the spring (581) is connected to the baffle (58) and drives the baffle (58) to rotate outward; It also includes a second return water tank (9), the second return water tank (9) is located below the fourth conveyor belt (6), the fourth conveyor belt (6) is connected to the sewage treatment device (10), the sewage treatment device (10) is connected to the water inlet of the water pump (16), and the water outlet of the water pump (16) is connected to the rotary joint (50).

2. The dust-removing asphalt pavement milling material crushing and circulating screening device according to claim 1 is characterized by: It also includes a conical protective plate (14) and a fixing rod (15), wherein the conical protective plate (14) is located above the discharge valve (13), the conical protective plate (14) is located inside the hopper (1), and the two ends of the fixing rod (15) are respectively fixedly connected to the inner wall of the hopper (1) and the conical protective plate (14).

3. The dust-removing asphalt pavement milling material crushing and circulating screening device according to claim 1 is characterized by: A funnel (41) and a material frame (43), wherein the funnel (41) is located below a material outlet of the multi-stage vibrating screen (4) and is fixedly connected to the multi-stage vibrating screen (4), and the material frame (43) is located below a third conveyor belt (42).

4. The dust-removing asphalt pavement milling material crushing and circulating screening device according to claim 1 is characterized by: The crusher is a hammer crusher.

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