CN112275774B

CN112275774B - A kind of asphalt milling material stirring stripping screening device and working method

Info

Publication number: CN112275774B
Application number: CN202011077748.3A
Authority: CN
Inventors: 李磊; 张吉哲; 卜德江; 邹斌; 姚占勇; 王飞; 刘继凯; 刘方洲; 冀浩楠
Original assignee: Shandong University; Shandong High Speed Group Co Ltd
Current assignee: Shandong University; Shandong High Speed Group Co Ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-07-16
Anticipated expiration: 2040-10-10
Also published as: CN112275774A

Abstract

The invention relates to an asphalt milling material stirring, peeling and screening device and a working method, comprising a box body, a shot blasting mechanism is arranged at the top of the box body, and a spiral blade is arranged at the bottom of the box body, the spiral blade is connected with a driving mechanism, and the driving mechanism can drive When the screw blade rotates, there is a screen under the screw blade, and an inclined discharge plate under the screen. The box is provided with a discharge port. The discharge port can make the milling material flow out to the outside of the box body, and the box body is also provided with a feeding port for adding the milling material. The device of the present invention can remove the asphalt film on the surface of the milling material and improve the subsequent asphalt milling material utilization rate.

Description

Asphalt milling material stirring, stripping and screening device and working method

Technical Field

The invention relates to the technical field of asphalt milling and planing material treatment, in particular to an asphalt milling and planing material stirring, stripping and screening device and a working method.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Under the influence of natural conditions such as illumination, precipitation, air and the like, the asphalt pavement can be simultaneously subjected to the load action of passing vehicles, a series of quality change reactions such as volatilization, oxidation and the like can be generated after the asphalt is used for a certain service life, the performance of the aged asphalt is greatly reduced, the asphalt pavement is dried and embrittled, further, the phenomena such as cracking and the like are generated, and the traffic safety is greatly reduced. Therefore, the aged asphalt pavement needs to be repaired or replaced.

In consideration of saving natural resources and protecting natural environment, an Asphalt Pavement recycling technology is generally adopted in the Pavement overhaul project, namely, an Asphalt milling material is obtained by scraping an aged surface of a road, and is crushed and screened by special equipment, then is proportionally mixed with a regenerant, new Asphalt, new aggregate and the like to obtain a recycled Asphalt mixture (RAP) meeting the performance of the Asphalt Pavement, and is paved back to the surface of the road again.

The inventor finds that the special asphalt recycling equipment only crushes the asphalt milling material, is difficult to effectively remove an asphalt film attached to the surface of the milling material, affects the product performance of RAP, reduces the utilization rate of the asphalt milling material, and greatly increases the cost of regenerating and renewing road engineering pavements.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a stirring, stripping and screening device for an asphalt milling material, which can effectively remove an asphalt film on the surface of the milling material and improve the utilization rate of the asphalt milling material.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, an embodiment of the invention provides an asphalt milling material stirring, stripping and screening device which comprises a box body, wherein a shot blasting mechanism is arranged at the top of the box body, a spiral blade is arranged at the bottom of the box body and connected with a driving mechanism, the driving mechanism can drive the spiral blade to rotate, a screen is arranged below the spiral blade, a discharging plate which is obliquely arranged is arranged below the screen, a discharging hole is formed in the box body, the discharging plate can guide a falling milling material to the discharging hole, the discharging hole can enable the milling material to flow out of the box body, and the box body is further provided with a feeding hole for adding the milling material.

In a second aspect, an embodiment of the present invention provides a working method of the asphalt milling material stirring, stripping and screening device according to the first aspect: the milling material to be removed of the asphalt film is added into the box body through the feeding hole, the driving mechanism drives the spiral blades to rotate, the milling material to be removed of the asphalt film is stirred, meanwhile, the added 0-5mm milling material is thrown out by the shot blasting mechanism and collides with the milling material to be removed of the asphalt film in the box body, the asphalt film of the milling material to be removed of the asphalt film added into the box body is peeled off, the milling material to be removed of the asphalt film is screened under the action of the screen mesh, and flows out of the box body through the discharging hole under the action of the discharging plate.

The invention has the beneficial effects that:

1. the device provided by the invention is provided with the shot blasting mechanism, the screen and the spiral blade connected with the driving mechanism, wherein the spiral blade can stir the milling material, the shot blasting mechanism can throw out 0-5mm of milling material to collide with the milling material in the box body to remove the asphalt film of the milling material, so that the removal of the asphalt film of the milling material is realized, and the utilization rate of the subsequent asphalt milling material is improved.

2. According to the device, the milling materials are stirred by adopting the helical blades, when viewed from the horizontal direction, the helical blades rotate to enable the asphalt milling materials to be uniformly distributed, and the milling materials, the surfaces of which are not positioned in the scattering range of the shot blasting mechanism, can reach the scattering range through the driving of the blades and are subjected to asphalt film stripping treatment; the helical blades have the function of lifting and transporting the milled materials in the rotating process, the milled materials at the bottom can be lifted to the surface layer, and the milled materials at the side edge fall to the bottom to form the circulation of milling materials in a working area, so that all the milled materials can be fully processed.

3. According to the working method of the device, the material thrown by the shot blasting mechanism is the milling material with the thickness of 0-5mm, so that the function of peeling the pitch film of the milling material through throwing is achieved, other materials are not added into the milling material, and the recycling of the throwing and milling materials is realized.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a side view of the whole structure of embodiment 1 of the present invention;

FIG. 3 is a rear view of the overall structure of embodiment 1 of the present invention;

FIG. 4 is a schematic view showing the assembly of the screen, the base plate, the rotary shaft and the helical blade in example 1 of the present invention;

FIG. 5 is a schematic view of a belt drive mechanism according to embodiment 1 of the present invention;

FIG. 6 is a sectional view of a blasting mechanism in embodiment 1 of the present invention;

the shot blasting machine comprises a frame body 1, a top plate 2, a bottom plate 3, a front side guard plate 4, a rear side guard plate 5, a left side guard plate 6, a right side guard plate 7, a left side high-chromium cast iron lining plate 8, a right side high-chromium cast iron lining plate 9, a rear side high-chromium cast iron lining plate 10, a speed reducing motor 11, a driving belt wheel 12, a driven belt wheel 13, a driving belt wheel 14, a driving belt 15, a protective cover 16, a feed inlet end cover 17, a hinge 18, a buckle 19, a material shoveling port end cover 20, an observation window 21, a shell, a shot blasting motor 22, a shot blasting wheel 23, a first opening 24, a directional sleeve 25, a second opening 26, a shot blasting rotor 27, a blade 28, a hopper 29, a discharge plate 30, a discharge port 31, a discharge port 32, a screen, a spiral blade 33, a rotating shaft 34, a first bearing seat 35 and a second bearing seat 36.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

As introduced in the background art, the existing processing equipment special for the asphalt milling and planing material can only crush the milling and planing material, cannot remove an asphalt film, and reduces the utilization rate of the asphalt milling and planing material.

In example 1 of a typical embodiment of the present application, as shown in fig. 1 to 6, a screening device for stirring and stripping a milling material for asphalt comprises a box body, wherein the box body is fixed on a frame body 1, the frame body is a truss structure formed by welding a plurality of steel beams, and comprises a plurality of vertical beams and a connecting beam welded between the vertical beams, the box body comprises a top plate 2, a bottom plate 3, an outer side guard plate and an inner side lining plate, the top plate is fixed at the top of the frame, a shot blasting mechanism is fixed on the top plate, the shot blasting mechanism can throw the material towards the inside of the box body, the bottom plate is fixed at the bottom of the frame body, the outer side guard plate comprises a front side guard plate 4, a rear side guard plate 5, a left side guard plate 6 and a right side guard plate 7, the front side guard plate, the rear side guard plate, the left side guard plate and the right side guard plate are respectively fixed, the inboard welt adopts high chromium cast iron welt, including the high chromium cast iron welt 8 of left side, the high chromium cast iron welt 9 of right side and the high chromium cast iron welt 10 of rear side, the high chromium cast iron welt of left side, the high chromium cast iron welt of right side and the high chromium cast iron welt of rear side pass through the medial surface of bolt fastening at the left and right, three position in back of support body respectively, inboard welt is used for avoiding the outside backplate to receive the impact of throwing the material of shot-blasting mechanism and mills the friction when the material circulates.

The frame body adopts a truss structure and is used for slowing down vibration caused by the working of the shot blasting mechanism and improving the stability of the equipment; this embodiment sets up backplate and welt respectively in the support body outside and inboard, and its effect is improve equipment's wearability, and backplate and welt are easily dismantled to overhaul and change in the frame through the bolt fastening in the frame.

The inside screen cloth 32 that is provided with of box, the screen cloth is pegged graft fixedly with the support body, in this embodiment, the high chromium cast iron welt of left side, the high chromium cast iron welt of right side and the high chromium cast iron welt of rear side all set up in the screen cloth top, prevent that it from pegging graft with the support body and causing the influence to the screen cloth. A plurality of screen holes are formed in the screen, and the size of each screen hole satisfies the following conditions: the milling material with the diameter of 0-5mm and the removed asphalt film can fall through the meshes, and other materials can not fall.

The top of screen cloth is equipped with two helical blade 33, two helical blade all with the one end fixed connection of pivot 34, the other end of pivot passes screen cloth and bottom plate, and the pivot is connected through first bearing frame 35 and second bearing frame 36 and screen cloth and bottom plate rotation respectively, the other end of pivot is passed and is connected with actuating mechanism behind the screen cloth, and actuating mechanism can drive the pivot and rotate, and then drives helical blade and rotate, and then stirs the material of milling of waiting to get rid of the pitch membrane in the box.

Actuating mechanism is including fixing the stirring driving piece at the support body, in this embodiment, the stirring driving piece adopts gear motor 11, gear motor's motor casing is fixed on the support body to the setting is outside at the box, and gear motor's output shaft passes through belt drive mechanism and is connected with two pivots, and gear motor can drive the rotation of two pivots through belt drive mechanism, belt drive mechanism includes driving pulley 12, driven pulley 13 and the drive belt 14 of round trip between driving pulley and driven pulley, driving pulley and gear motor's output shaft, two pivots all are connected with driven pulley, and driving pulley and two driven pulley's axis are triangular distribution, the round trip between driving pulley and the driven pulley drive belt.

The periphery of the belt transmission mechanism is provided with a protective cover 15 for protecting the driving belt wheel, the driven belt wheel and the transmission belt and prolonging the service life of the belt transmission mechanism.

The gear motor is arranged outside the frame, so that the driving belt wheel and the two driven belt wheels are arranged in a triangular mode, the transmission mechanism is simplified, the installation space is saved, and the gear motor is easy to maintain.

In the embodiment, the speed reducing motor is provided with the frequency converter, the rotating speed of the helical blade can be adjusted within 0-60r/min by changing the working frequency of the speed reducing motor, and the stripping effect of the asphalt milling material under different rotating speeds of the helical blade can be conveniently researched.

The front side guard plate is provided with a feed inlet and a material shoveling port, the feed inlet is positioned above the material shoveling port, the feed inlet is used for placing milling materials to be removed of the asphalt film, and the material shoveling port is used for shoveling unprocessed milling materials in the box body.

The feed inlet department is provided with feed inlet end cover 16, the feed inlet end cover passes through hinge 17 and is connected with the rotation of front side guard plate, can open or close the feed inlet, the feed inlet end cover bottom is passed through the hinge and is connected with the rotation of front side guard plate, and the top is equipped with buckle 18, and the feed inlet end cover can be fixed with the locking of front side guard plate through buckle and the buckle cover that sets up at the front side guard plate.

The shovel material mouth adopts the rectangular shape, and its size satisfies that the staff can use the instrument to shovel the interior untreated demand of milling the plane material of case, shovel material mouth department is provided with shovel material mouth end cover 19, shovel material mouth end cover bottom is passed through the hinge and is rotated with the front side backplate and be connected, and the top is equipped with the buckle, and shovel material mouth end cover can be fixed with the locking of front side backplate through buckle and the buckle cover that sets up at the front side backplate, and shovel material mouth end cover rotates, can realize opening or closing the shovel material mouth.

Be provided with the mounting groove on the rear side guard plate, install observation window 20 in the mounting groove, the observation window adopts transparent toughened glass to make for the course of work provides the observation field of vision, can dismantle when the course of work stops and change or wash when wearing and tearing appear or be stained with the ash phenomenon.

In this embodiment, the height of the top end of the rear high-chromium cast iron lining plate is lower than that of the observation window, so that the normal operation of the observation window is not affected.

The shot blasting mechanism comprises a shell 21, the shell is fixed on a top plate, a shot blasting driving piece is fixed on the wall of one side part of the shell, in the embodiment, the shot blasting driving piece adopts a shot blasting motor 22, the motor shell of the shot blasting motor is fixed on the shell, the output shaft of the shot blasting motor is connected with a shot separating wheel 23 arranged inside the shell, the shot blasting motor can drive the shot separating wheel to rotate, a plurality of first openings 24 are formed in the pipe wall of the shot separating wheel, a hopper 29 is arranged on the wall of the other side part of the shell, the end part of a material opening extends into the inside of the shot separating wheel, a worker can send materials to be thrown into the inside of the shot separating wheel through the hopper, the shot separating wheel can rotate under the action of the shot blasting motor, and the materials in the shot separating wheel can flow out through the first openings.

The periphery of the pill distributing wheel is also sleeved with a directional sleeve 25 which is fixedly connected with the lateral shell wall of the shell, the wall of the directional sleeve is provided with a second opening 26, the material flowing out of the first opening can flow out of the directional sleeve through the second opening, and the directional sleeve is used for limiting the flying-out range of the material.

The shot blasting wheel is fixed with a shot blasting rotor 27, the shot blasting rotor is provided with a plurality of blades 28, the blades are inserted from the side seam of the shot blasting rotor and are fixedly connected with the shot blasting rotor through a buckle at the bottom of the shot blasting rotor, the shot blasting rotor is composed of two circular ring plates connected by a plurality of connecting rods, one section of the shot blasting rotor is fixed with the shot blasting wheel, the blades are arranged so that a first opening is positioned between every two adjacent blades, the blades and the shot blasting rotor are not in contact with the outer wall surface of the directional sleeve and can rotate along with the shot blasting wheel, materials flowing out through a second opening can enter a gap between every two adjacent blades and collide with the blades, and the materials are further accelerated to be thrown under the action of the blades.

The below of screen cloth is equipped with stripper 30, the stripper is fixed on the support body and the slope sets up, and the tip height that the stripper is close to the left side backplate is greater than the tip height that is close to the right side backplate for the material that the screen cloth fell through the sieve mesh can be to the right side backplate landing, be provided with discharge gate 31 on the backplate of right side, the material that the stripper landing can flow out the box outside through the discharge gate.

Example 2:

the embodiment discloses a working method of the asphalt milling material stirring, stripping and screening device in embodiment 1, which comprises the following steps:

the asphalt milling material with the grain diameter of 0-5mm is defined as fine material, and the asphalt milling material with the grain diameter of more than 5mm is defined as coarse material.

1) A dustproof cloth bag is arranged at the discharge port, and the feed port end cover and the shovel material port end cover are ensured to be in a closed state;

2) opening a feed port end cover, placing the asphalt milling material to be subjected to asphalt film removal in a working area of the box body through the feed port to ensure that the material accumulation height of the asphalt milling material is completely higher than the top end of the helical blade, and closing the feed port end cover;

3) sequentially turning on power supplies of a stepping motor and a shot blasting motor, adding fine asphalt milling materials with the radius within the range of 0-5mm into a hopper of a shot blasting mechanism at a constant speed to serve as throwing materials, throwing the throwing materials to the milling materials of the asphalt membrane to be removed in a box body through a first opening and a second opening, so that the milling materials of the asphalt membrane to be removed are simultaneously subjected to stripping action generated by throwing materials in the stirring process of a spiral blade, the asphalt membrane on the surface of the milling materials is removed, the spiral blade can convey the milling materials at the bottom to the surface in the rotating process, circulation of the asphalt milling materials in a working area is realized, and the processed fine asphalt milling materials with the radius of 0-5mm and the stripped asphalt membrane are conveyed into a dustproof cloth bag through a discharge plate and a discharge port under the screening of a screen mesh screen in the circulating process;

4) after the equipment ejection process is finished, turning off a power supply of the impeller head, keeping the speed reduction motor normally running and driving the stirring device to continue working for a period of time, so that milling and planing material fine materials in a working area meeting the radius range are completely discharged through the discharge port and stored in a dustproof cloth bag; and (4) closing the speed reducing motor, opening the shoveling material port after the stirring device completely stops rotating, and shoveling out the remaining incompletely processed milling materials.

The material thrown by the shot blasting mechanism in the embodiment is the asphalt milling material fine material with the radius within the range of 0-5mm, so that the function of stripping the asphalt film of the coarse material of the milling material through casting is achieved, other materials are not added into the coarse material, and the recycling of the throwing material and the milling material is realized.

By adopting the device of the embodiment, the asphalt film on the surface of the milling material can be removed and collected, and the utilization rate of the subsequent asphalt milling material is improved.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. an asphalt milling material stirring, peeling and screening device, characterized in that it comprises a box body, the top of the box body is provided with a shot blasting mechanism, and the bottom of the box body is provided with a helical blade, and the helical blade is connected with the drive mechanism, and the bottom of the helical blade is provided with a shot blasting mechanism. There is a screen, an inclined discharge plate is arranged under the screen, the box body is provided with a discharge port, the discharge plate can guide the falling milling material to the discharge port, and the discharge port can make the milled material flow out To the outside of the box body, the box body is also provided with a feeding port for adding the milling material. The driving mechanism drives the spiral blade to rotate, and the milling material to be removed from the asphalt film is stirred. At the same time, the shot blasting mechanism will add the milling material. The material is ejected and collided with the milling material to be removed from the asphalt film in the box.

2 . The asphalt milling material stirring, peeling and screening device according to claim 1 , wherein the shot blasting mechanism comprises a casing, and the casing is fixed with a shot blasting driving member, and the shot blasting driving member is connected to the casing. 3 . The pelletizing wheel located in the shell is connected, the pelletizing wheel is fixedly connected with a plurality of blades, the pipe wall of the pelletizing wheel between the adjacent blades is provided with a first opening, and the shell is also provided with a hopper, and the hopper extends into the pelletizing wheel. inside the wheel.

3. The asphalt milling material stirring, peeling and screening device according to claim 2, wherein the outer periphery of the pelletizing wheel is covered with a directional sleeve, the directional sleeve is used to limit the flying range of the material, and the directional sleeve is connected to the shell. The bodies are fixedly connected, and the directional sleeve is provided with a set number of second openings, and the material in the pelletizing wheel can enter the space between the adjacent blades through the first opening and the second opening.

4. The asphalt milling material stirring, stripping and screening device according to claim 1, wherein the driving mechanism comprises a stirring driving member, and the stirring driving member is connected with the rotating shaft through a belt transmission mechanism, and the screw The blades are fixed on the shaft.

5 . The asphalt milling material stirring, peeling and screening device according to claim 1 , wherein the feeding port is provided with a feeding port end cover capable of opening or closing the feeding port. The end cover is rotatably connected with the box body and can be locked and fixed with the box body.

6 . The asphalt milling material stirring, peeling and screening device according to claim 1 , wherein the box body is further provided with a shovel opening, and the shovel opening is provided with a shovel capable of opening or closing. 7 . The shovel port end cover of the material port is rotatably connected with the box body and can be locked and fixed with the box body.

7 . The asphalt milling material stirring, peeling and screening device according to claim 1 , wherein an observation window is further provided on the box body. 8 .

8 . The asphalt milling material stirring, stripping and screening device according to claim 1 , wherein the box body is fixed on the frame body, and the box body comprises a top plate, a bottom plate, a bottom plate, a The outer guard plate and the inner lining plate, the top plate is fixed on the top of the frame body to support the shot blasting mechanism, the bottom plate is fixed at the bottom of the frame body and is rotatably connected with the spiral blade, the outer guard plate is fixed on the outer side of the frame body, The inner lining plate is fixed on the inner side of the frame.

9 . The asphalt milling material stirring, peeling and screening device according to claim 8 , wherein the inner lining board adopts a high-chromium cast iron lining board, which is used to prevent the outer protective plate from being subjected to the blasting by the shot blasting mechanism. 10 . Impact and friction during circulation of the milled material.

10. A working method of the asphalt milling material stirring, stripping and screening device according to any one of claims 1-9, characterized in that, the milling material to be removed from the asphalt film is added in the box through the feeding port, and the driving mechanism The screw blade is driven to rotate, and the milling material to be removed from the asphalt film is stirred. At the same time, the shot blasting mechanism ejects the added 0-5mm milling material, which collides with the milling material to be removed from the asphalt film in the box. The bituminous membrane of the milled material to be removed from the bituminous membrane added is peeled off, and the milled material from which the bituminous membrane is removed is screened under the action of the screen, and flows out to the outside of the box through the discharge port under the action of the discharge plate.