CN109736169B

CN109736169B - Stirring equipment for asphalt concrete regeneration

Info

Publication number: CN109736169B
Application number: CN201910087733.6A
Authority: CN
Inventors: 皮育晖; 王孝林
Original assignee: Chongqing Vocational Institute of Engineering
Current assignee: Chongqing Vocational Institute of Engineering
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2020-10-09
Anticipated expiration: 2039-01-29
Also published as: CN109736169A

Abstract

The invention relates to the technical field of pavement buildings, in particular to stirring equipment for asphalt concrete regeneration, which comprises a stirring barrel, wherein a heating cavity is arranged at the bottom of the stirring barrel, an upper stirring shaft is vertically arranged in the stirring barrel, a plurality of upper stirring blades are arranged on the upper stirring shaft, a lower stirring shaft is vertically and slidably connected to the bottom of the upper stirring shaft, and a plurality of lower stirring blades are arranged on the lower stirring shaft. The invention solves the problems of uneven heating and poor stirring effect of asphalt in the prior art.

Description

Stirring equipment for asphalt concrete regeneration

Technical Field

The invention relates to the technical field of pavement construction, in particular to a stirring device for asphalt concrete regeneration.

Background

The asphalt pavement recycling technology is to dig, recover, crush, screen and heat the old asphalt pavement to be repaired or discarded, add a proper amount of new aggregate, new asphalt and other auxiliary materials to mix again to form a regenerated asphalt mixture with pavement performance, and then use a paver to pave the pavement or the base course.

The prior art discloses an asphalt stirring device, including heating the chamber, heating chamber top is the stirring chamber, and vertical setting (mixing) shaft in the stirring chamber transversely sets up a plurality of stirring vane on the (mixing) shaft and stirs pitch. The device heats the asphalt while stirring the asphalt, and improves the efficiency of asphalt regeneration and manufacture. When the device is used for stirring asphalt, the temperature at the bottom of the stirring cavity is higher, the temperature at the top of the stirring cavity is lower, the asphalt in the whole stirring cavity is heated unevenly, and the stirring effect is poor; moreover, the asphalt at the bottom is easy to age due to long-term high-temperature heating.

Disclosure of Invention

The invention aims to provide stirring equipment for asphalt concrete regeneration, and aims to solve the problems of uneven heating and poor stirring effect of asphalt in the prior art.

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

stirring equipment for asphalt concrete regeneration, including the agitator, the agitator bottom is provided with the heating chamber, and the vertical (mixing) shaft that is provided with in the agitator goes up the (mixing) shaft and is connected with the top of agitator, goes up to be provided with a plurality of stirring vane on the (mixing) shaft, goes up the vertical sliding connection in (mixing) shaft bottom and has lower (mixing) shaft, is provided with a plurality of stirring vane down on the lower (mixing) shaft, and lower (mixing) shaft is connected with the actuating mechanism who is used for driving its vertical migration.

The principle of the scheme is as follows:

the agitator is used for splendid attire pitch, and the heating chamber is used for heating pitch. Go up stirring vane and stirring vane down and be used for stirring pitch, because (mixing) shaft and last (mixing) shaft sliding connection down, at the in-process of stirring, utilize actuating mechanism drive down (mixing) shaft rebound, can upwards promote the pitch of agitator bottom.

The beneficial effect of this scheme does:

1. the lower stirring shaft is driven to move upwards, so that the asphalt at the bottom of the stirring barrel can be pushed upwards, and the asphalt at the bottom of the stirring barrel is prevented from being aged due to long-term high-temperature heating;

2. because the pitch of agitator bottom has upwards moved, when pitch rebound, the agitator is peripheral, and the pitch that is close to the agitator lateral wall promptly can remove to the agitator middle part to make pitch have a mobile process in the agitator footpath, the stirring effect of pitch is better.

3. The stirring shaft moves in the vertical direction under the drive of relapse, can stir pitch in the vertical direction, and stirring effect is better.

4. Because the viscosity of the asphalt is high, when the lower stirring blade pushes the asphalt to move upwards, the viscous asphalt can be adhered to the bottom of the lower stirring blade and move upwards along with the lower stirring blade, so that the asphalt at the bottom of the lower stirring blade is subjected to a vertical pulling acting force; in a similar way, after the lower stirring shaft moves upwards, the distance between the lower stirring blade and the upper stirring blade is reduced, and the asphalt between the lower stirring blade and the upper stirring blade can be extruded to a certain extent, so that the asphalt stirring effect can be further improved under the action of pulling and extruding force.

Further, lower (mixing) shaft includes axle body and the vertical montant of setting in the axle body, is provided with the slider on the montant, the vertical spout that is provided with on the lower (mixing) shaft inner wall, slider sliding connection in the spout, and stirring vane articulates on the montant down, and stirring vane runs through down outside the (mixing) shaft extends to lower (mixing) shaft, and stirring vane can enclose into the lift case that is used for lifting pitch down. Lower stirring vane runs through lower (mixing) shaft and articulates on the montant, and (mixing) shaft rebound keeps the montant motionless under the drive, can drive stirring vane down and rotate towards lower (mixing) shaft to make all lower stirring vane draw close and form and lift the case. Compare with stirring vane up-shifting under the horizontality, form and lift the more pitch of case can the splendid attire to make more pitch by the pushup, and then make more pitch flow to the agitator middle part, improved the intensity that pitch flows, stirring effect is better.

Furthermore, the upper stirring shaft is hollow, a guide groove is vertically formed in the inner wall of the upper stirring shaft, a connecting rod is arranged on the outer wall of the lower stirring shaft, and the connecting rod is connected in the sliding guide groove in a sliding mode. Through connecting rod sliding connection in the guide way, can realize the sliding connection of (mixing) shaft and (mixing) shaft down, can also make simultaneously down the (mixing) shaft along with last (mixing) shaft is together rotated, only need from this the drive go up the (mixing) shaft can drive down the (mixing) shaft and rotate, need not to additionally use power unit drive down the (mixing) shaft and rotate, practiced thrift power resource.

Further, a through hole for the lower stirring blade to pass through is formed in the side wall of the lower stirring shaft, and an air bag is sleeved on the lower stirring blade and arranged in the through hole. The air bag is used for sealing a gap between the through hole and the lower stirring blade and preventing asphalt from entering the lower stirring shaft from the through hole; in addition, the gasbag can also provide stirring vane pivoted space down through the deformation, and one side of gasbag is extruded the back, and the gas in it can flow to not by extruded one side to fill the clearance between through-hole and the stirring vane down, consequently can reach the purpose of sealed through-hole all the time.

Further, a heat conduction pipe is vertically arranged in the side wall of the stirring barrel. The heat pipe is used for in the lateral wall of conduction to the agitator with the heat to pitch in the side heats the agitator, and the heating effect is better.

Further, the diameter of the top end of the heat conduction pipe is larger than that of the bottom end of the heat conduction pipe. So can make the heat conduction area on heat pipe top be greater than the heat conduction area of its bottom, because the heat source is kept away from at heating chamber top, so set up and to be heated more evenly so can make the pitch in the agitator.

Drawings

FIG. 1 is a longitudinal cross-sectional view of a first embodiment of the present invention;

FIG. 2 is a longitudinal sectional view of a second embodiment of the present invention;

fig. 3 is a longitudinal sectional view of a third embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the stirring device comprises a feeding hole 1, an upper stirring shaft 2, an upper stirring blade 3, a connecting rod 4, a heat conduction pipe 5, a stirring barrel 6, a vertical rod 7, a shaft body 8, a lower stirring blade 9, a heating cavity 10, a heating source 11, a sliding block 12, a friction block 13 and a connecting cavity 14.

Example one

As shown in fig. 1, the stirring device for asphalt concrete regeneration comprises a stirring barrel 6, wherein a feeding hole 1 is formed in the top of the stirring barrel 6, and a discharging hole is formed in the bottom of the stirring barrel 6. The bottom of the stirring barrel 6 is provided with a heating cavity 10, a heating source 11 is installed in the heating cavity 10, and the heating source 11 is an electric heating wire in this embodiment.

An upper stirring shaft 2 is vertically arranged in the stirring barrel 6, the upper stirring shaft 2 is rotatably connected to the top wall of the stirring barrel 6, and the upper stirring shaft 2 is connected with a motor. A plurality of upper stirring blades 3 are welded on the upper stirring shaft 2. Go up the inside cavity of (mixing) shaft 2, its inside vertical sliding connection has lower (mixing) shaft, and lower (mixing) shaft includes axle body 8 and vertical montant 7 of setting in axle body 8, and axle body 8 is connected with the cylinder, and the cylinder is installed in the diapire of agitator 6. The specific connection mode of the shaft body 8 and the upper stirring shaft 2 is as follows: go up and vertically seted up the guide way on 2 inner walls of (mixing) shaft, the welding has connecting rod 4 on 8 outer walls of axle body, and connecting rod 4 sliding connection is in smooth guide way.

The vertical rod 7 is welded with a sliding block 12, the inner wall of the shaft body 8 is vertically provided with a section of sliding groove, and the sliding block 12 is connected in the sliding groove in a sliding mode. Articulated on the montant 7 have a plurality of stirring vane 9 down, set up the through-hole that supplies stirring vane 9 to pass down on the 8 lateral walls of axle body, the cover is equipped with the gasbag on the stirring vane 9 down, and the gasbag joint is in the through-hole, and the gasbag adopts heat-resisting material's gasbag to avoid the heating process in the damage of being heated. Lower stirring vane 9 passes and extends to outside the axle body 8 from the through-hole, and thereby lower stirring vane 9 can rotate towards axle body 8 and enclose into the lifting case that is used for lifting pitch, and lower stirring vane 9 can adopt fan-shaped, fan-shaped or trapezoidal and so on in this embodiment can enclose into the shape of lifting case.

When the asphalt mixer is used for mixing asphalt, raw materials such as asphalt, aggregate, regenerant and the like to be mixed are put into the mixing tank 6 from the feeding hole 1. The starting motor drives the upper stirring shaft 2 to rotate, and the upper stirring shaft 2 drives the upper stirring blade 3 to stir the asphalt. Because the connecting rod 4 on the shaft body 8 is connected in the guide way, the upper stirring shaft 2 can drive the shaft body 8 to rotate together when rotating, and the lower stirring blade 9 is driven to stir the asphalt.

During the stirring, the actuating cylinder drives the shaft body 8 to reciprocate in the vertical direction. When axle body 8 rebound, because montant 7 and axle body 8 sliding connection, montant 7 can not remove, because stirring vane 9 articulates on montant 7 down, stirring vane 9 rotates upwards around its pin joint down in the time of the 8 rebound of event axle body to make stirring vane 9 enclose the case that lifts that is used for lifting pitch down. When 8 rebound of axle body, slider 12 on the montant 7 slides in the spout, when stirring vane 9 encloses into lifting the case down, slider 12 slides to the tip of spout and can't continue to slide, and the cylinder continues drive axle body 8 rebound at this moment and can drive montant 7 together rebound, makes lifting case rebound from this.

At the beginning, stirring vane 9 is in the horizontality down, and when stirring vane 9 formed the lift case down, the pitch that is located on the lower stirring vane 9 of agitator 6 bottom can be followed stirring vane 9 and flowed to the lift case down, so lift the pitch that can upwards promote agitator 6 bottom when the case rebound, can prevent that the pitch of agitator 6 bottom from heating for a long time ageing. Therefore, the asphalt moves in the vertical direction, and the stirring effect is better compared with the simple stirring of the asphalt in the horizontal direction.

After the asphalt at the bottom of the stirring barrel 6 is pushed upwards, the center of the stirring barrel 6 is vacant, and the asphalt close to the side wall of the stirring barrel 6 can flow to the vacancy at the center of the stirring barrel 6, so that the asphalt flows in the radial direction of the stirring barrel 6, and the stirring effect of the asphalt is further improved.

In addition, because the viscosity of the asphalt is high, when the lower stirring blade 9 moves upwards, the asphalt at the bottom of the lower stirring blade 9 can be adhered to the lower stirring blade 9 and move upwards along with the lower stirring blade 9, so that the asphalt below the lower stirring blade 9 is subjected to a pulling force in the vertical direction. Moreover, after the lower stirring blade 9 moves upwards, the asphalt between the lower stirring blade 9 and the upper stirring blade 3 can receive an extrusion force, and the stirring effect of the asphalt can be further improved under the action of the extrusion force and the pulling force.

Example two

As shown in fig. 2, the present embodiment is different from the first embodiment in that a heat conduction pipe 5 is vertically disposed in a side wall of an agitating barrel 6, a diameter of a top end of the heat conduction pipe 5 is larger than a diameter of a bottom end of the heat conduction pipe 5, and the heat conduction pipe 5 is a conventional metal pipe with good heat conduction performance. The heat conduction pipe 5 can transmit the heat of the heating source 11 to the side wall of the stirring barrel 6, so that the stirring barrel 6 can also heat in the circumferential direction, and the asphalt is heated more uniformly. Further, the diameter of the top end of the heat conductive pipe 5 is larger than that of the bottom end thereof, which makes the heat conductive area of the top end of the heat conductive pipe 5 larger than that of the bottom end thereof. Because heating source 11 is kept away from at 6 tops of agitator, so set up the homogeneity that heat pipe 5 can improve the temperature in 6 lateral walls of agitator for pitch is heated more evenly.

EXAMPLE III

As shown in fig. 3, the present embodiment is different from the first embodiment in that: a connecting cavity 14 is formed in the bottom of the stirring barrel 6, a friction block 13 is vertically and slidably connected in the connecting cavity 14, the friction block 13 is rotatably connected with a vertical rod 7, and the vertical rod 7 is slidably connected with the top of the connecting cavity 14. When axle body 8 rebound, because montant 7 and axle body 8 sliding connection, so montant 7 can not remove, and when slider 12 on montant 7 removed to the bottom of spout, axle body 8 can drive montant 7 and overcome the frictional force between clutch blocks 13 and the connection chamber 14 to drive montant 7 rebound together.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Asphalt concrete is agitated vessel for regeneration, including the agitator, the agitator bottom is provided with heating chamber, its characterized in that: an upper stirring shaft is vertically arranged in the stirring barrel, the upper stirring shaft is connected with the top of the stirring barrel, a plurality of upper stirring blades are arranged on the upper stirring shaft, a lower stirring shaft is vertically and slidably connected to the bottom of the upper stirring shaft, a plurality of lower stirring blades are arranged on the lower stirring shaft, and the lower stirring shaft is connected with a driving mechanism for driving the lower stirring shaft to vertically move; lower (mixing) shaft includes this internal montant of axle body and vertical setting, is provided with the slider on the montant, and the vertical spout that is provided with on the lower (mixing) shaft inner wall, slider sliding connection are in the spout, stirring vane articulates on the montant down, and lower stirring vane runs through down outside the (mixing) shaft extends to lower (mixing) shaft, and lower stirring vane can enclose into the lift case that is used for lifting pitch.

2. The asphalt concrete recycling mixing apparatus according to claim 1, characterized in that: the upper stirring shaft is hollow, a guide groove is vertically formed in the inner wall of the upper stirring shaft, and a connecting rod is arranged on the outer wall of the lower stirring shaft and is connected in the guide groove in a sliding mode.

3. The asphalt concrete recycling mixing apparatus according to claim 2, characterized in that: the side wall of the lower stirring shaft is provided with a through hole for the lower stirring blade to pass through, the lower stirring blade is sleeved with an air bag, and the air bag is arranged in the through hole.

4. The asphalt concrete recycling mixing apparatus according to any one of claims 1 to 3, wherein: and a heat conduction pipe is vertically arranged in the side wall of the stirring barrel.

5. The asphalt concrete recycling mixing apparatus according to claim 4, wherein: the diameter of the top end of the heat conduction pipe is larger than that of the bottom end of the heat conduction pipe.