JPH0352247Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a road surface rehabilitation and repair machine that recycles asphalt mixture that has been loosened and picked up.

[Conventional technology]

Conventionally, when regenerating asphalt pavement by heating, it is only necessary to heat and loosen the paved road surface using multiple heater trucks in the laid state before it is loosened. Even if there was any heating, the asphalt mixture was heated to a level that minimized the temperature drop of the asphalt mixture in the stirring section.

[Problem that the invention attempts to solve]

In order to heat the laid asphalt material using multiple conventional heater trucks and then loosen it with a regular road surface restoration machine to ensure a sufficient temperature rise of the recycled composite material when carrying out restoration work such as paving. This had the disadvantage that heat inevitably penetrated to the underside of the paving, prolonging the time it took for traffic to be cleared after resurfacing.

Furthermore, even in the case of a road surface reclamation repair machine equipped with a heating device, its heating capacity is only sufficient to prevent the temperature of the loosened mixture material from dropping due to stirring, and no effect of increasing the temperature can be expected at all.

This idea solves the above-mentioned problems of conventional methods, and uses circulating hot air to spray hot air at a uniform temperature almost evenly onto the paving material being conveyed by a conveying device. The purpose is to provide repair machines.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides an inlet for introducing the loosened paving mixture at one end of the furnace, and an outlet at the other end.
In a road surface rehabilitation and repair machine that heats the furnace, the pavement mixture input from the input port is stirred by a stirring means and conveyed to the discharge port by a conveying device, and includes: (a) a hot air discharge side connected to a hot air generator; Blow-off ports consisting of a group of pipes or a group of small holes communicating with the duct and blowing out hot air are arranged above the conveying device and at approximately equal intervals in the conveying direction; (b) openings are made at a position away from the hot-air discharge side duct; A technical measure is taken in which a hot air circulation duct is provided to return the hot air to the hot air generator, thereby communicating the furnace and the hot air generator so that the hot air circulates.

[Effect]

The paving mixture that has been loosened and put into the furnace from the input port is conveyed to the discharge port by the conveyance device and is stirred by the stirring means.

Further, in the above-mentioned furnace, hot air generated by a hot-air generator passes through a hot-air discharge side duct, and is blown onto the paving mixture on the conveyance path of the above-mentioned conveyance device from an outlet consisting of a group of pipes or a group of small holes.

The hot air blown out from this outlet is evenly blown at almost the same high temperature onto the paving material being transported.

Furthermore, the air that has undergone heat exchange returns to the hot air generator via the hot air circulation duct, is heated again, and is circulated and used.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, A is a road heater vehicle;
Hopper 2 that accepts asphalt composite material in the front part,
A hot air generator 1 and a hot air generator 1 are installed on the central vehicle body.
A heating section 3 connected to the hopper 2 and a bar feeder conveyor 5 are provided at the rear thereof, and the hopper 2 and the bar feeder conveyor 5 are connected by the conveyor or the like.

Reference numeral B designates a road surface rehabilitation and repair machine according to the present invention, which is placed at the rear of the road heater vehicle A, and has a hopper 6 at the front that receives the mixture from the bar feeder conveyor 5, and a belt conveyor 11 connected to the rear from the hopper 6. will be established.

Furthermore, a rotary scarfing iron 9 for loosening the asphalt pavement road surface is installed at the lower part of the vehicle body of the road surface rehabilitation repair machine B, and a loader device 10 is installed for feeding the asphalt pavement mixture loosened by the rotary scarfing iron 9 into a heating furnace 12. Also provided.

13 is the old mixed material from the heating furnace, belt conveyor 1
This is a mixer installed on the car body that mixes the new composite material from 1, and there is also a mixer 13 towards the rear of the car body.
The first screw 14, which spreads the composite material from
Screed 15, screed 16 for leveling the laid material
will be established.

A hot air generator 8 is also provided on the vehicle body, and a hot air circulation path is provided between it and the heating furnace 12.

Note that 4 and 7 in the figure are prime movers.

Figures 2 and 3 show details of the heating furnace 12, in which a bar conveyor chain 23 is spanned between an idle attached to the bar conveyor idle shaft 18 and a sprocket attached to the bar conveyor drive shaft 24. , a bar conveyor drive chain 29 connected to a bar conveyor drive hydraulic motor 25
The bar conveyor drive shaft 24 is rotated to drive the bar conveyor.

This heating furnace 12 is provided with a hot air discharge side duct 26 and a hot air circulation side duct 27 for hot air circulation, and each duct 26 and 27 is connected to the hot air generator 8 to form a hot air circulation path.

22 is a plurality of hot air injection pipes provided in the hot air discharge side duct 26 at equal intervals along the width of the paving mixture conveyance path, and serves as an outlet; 32 is a hot air discharge pipe;
33 is a loader device 10 for transporting the loosened pavement mixture.
This is an input port for receiving asphalt mixture from
The asphalt mixture 17 is conveyed from the input port 33 by a bar conveyor, and reaches the mixer 13 through the asphalt mixture discharge port 34.

Furthermore, while the asphalt mixture 17 is being transported by the bar conveyor, it is stirred according to the following configuration.

A drive chain sprocket 30 is rotationally driven via an agitation drive chain 28 connected to an agitation drive hydraulic motor 21, and the agitation shaft 20 provided with the sprocket 30 is rotated.

The stirring shaft 20 is provided with a large number of stirring blades projecting radially in the axial direction.

Furthermore, a chain sprocket 31 for interlocking drive is provided at the other end of the stirring shaft 20, and a plurality of stirring shafts 2
Rotate 0 in conjunction.

In addition, 19 in the figure is a screw.

In this embodiment, the heating device includes a hot air generator 8 that generates hot air, and a heating furnace 12 that blows the hot air from the hot air generator 8 onto the paving mixture to heat it.

The heating furnace 12 includes a bar feeder chain 23 driven by a hydraulic motor, a stirring shaft 20, and a screw 1.
9. Consists of hot air injection pipe 22, etc.
The asphalt composite material loosened by the rotary carificer 9 is picked up by a loader device 10 and fed into a heating furnace 12.

The injected asphalt mixture 17 is first spread uniformly across the width of the furnace by the screw 19, and
While being stirred by the stirring shaft 20, it is transferred to the right in the figure by the bar conveyor chain 23.

Hot air generated by the hot air generator 8 is guided through the hot air discharge side duct 26 and is injected from the hot air injection pipe 22 to the mixed material being stirred and transferred.

The injected hot air exchanges heat with the asphalt mixture transported at the bottom, passes through the hot air discharge pipe 32 and the hot air circulation side duct 27, returns to the hot air generator 8, is heated again, and is injected along the same route. .

This makes it possible to efficiently additionally heat only the picked up composite material that requires heating.

The asphalt mixture whose temperature has been raised while being agitated and transferred in the heating furnace 12 as described above is discharged from the heating furnace 12, and is transferred to the mixer 13 by the barfeeder conveyor 5 and the belt conveyor 11. ) or mixed with additives supplied from an additive supply device (not shown).

This additive supply device is preferably located at the hopper 6 or the belt conveyor 11, and the additive is mixed there.

The asphalt mixture mixed and dropped on the ground is spread uniformly by a first screw 14 and a second screw 15, spread flat by a screed 16, and compacted by a following roller, completing the repair work.

Next, FIG. 4 shows a different embodiment of this invention.

This heating furnace 12' is driven by an agitation transfer drive motor 3.
5, the stirring and transporting screw 36 is rotationally driven, and stirring and transporting of the mixed material are accomplished by the same means.

In addition, 26' shown in the figure is a hot air discharge side duct,
27' is a hot air circulation side duct, 33' is an asphalt mixture inlet, 34' is an asphalt mixture outlet,
37 is a hot air outlet.

The asphalt mixture input into the furnace from the asphalt mixture input port 33' is fed to the screw 36.
Asphalt mixture discharge port 34' is stirred by
transported to.

During this conveyance, hot air generated by a hot air generator 8 (not shown) is guided through the hot air discharge side duct 26' and is blown out from the hot air outlet 37.

The injected hot air exchanges heat with the asphalt mixture transported in the lower part, and is transferred to the hot air circulation side duct 27'.
The hot air is returned to the hot air generator 8 through the hot air generator 8, where the temperature is raised again and the air is injected along the same route.

Other configurations and operations are similar to those of the embodiment described above, and the asphalt mixture can be heated in the same manner as in the embodiment described above.

[Effect of idea]

According to the present invention, while only the loosened composite material that requires heating is picked up and stirred and transferred, the hot air discharged from the hot air discharge side duct is blown from the blow-off ports provided at approximately equal intervals in the conveyance direction, making it efficient. It is possible to reliably additionally heat only the composite material that is necessary for the purpose, and at the same time, it is possible to prevent excess heat from penetrating into the lower part of the installation.

In addition, since the amount of oxygen in the furnace is small, the deterioration of the heated mixture is reduced, and the blown hot air circulates, making it possible to save energy.

Moreover, the temperature increase of the composite material can be easily controlled by adjusting the speed of the conveying means, the amount of hot air, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of the present invention;
FIG. 2 is a side view showing an example of a heating furnace used in the present invention, FIG. 3 is a view taken in the direction of the arrow in FIG.
FIG. 4 is a side view showing a heating furnace of a different embodiment of this invention. B...Road surface restoration repair machine, 8...Hot air generator, 9...Rotary carificer, 12...Heating furnace, 13...Mixer, 20...Stirring shaft, 26
...Hot air discharge side duct, 27...Hot air circulation side duct.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An inlet for introducing the loosened pavement mixture is formed at one end of the furnace, and an outlet is provided at the other end, and the pavement is charged through the inlet. In a road surface restoration repair machine that transports the mixed material to the discharge port with a conveying device while stirring it with a stirring means and also heats the furnace, a group of pipes or A hot air circulation side duct which has air outlets consisting of a group of small holes arranged above the conveyance device and at approximately equal intervals in the conveyance direction, and which is opened at a position away from the hot air discharge side duct to return hot air to the hot air generation device. A road surface rejuvenation and repair machine characterized in that the above-mentioned furnace and hot air generator are connected to each other so that hot air circulates therethrough. (2) The conveying device consists of a bar conveyor rotating with an endless chain, and the stirring means is characterized by rotating a stirring shaft which is horizontally suspended on the conveying path and has stirring blades protruding radially. A road surface rehabilitation and repair machine as set forth in claim 1 of the utility model registration claim. (3) The road surface rehabilitation and repair machine according to claim 1, wherein the conveying device is a screw conveyor and is integrated with stirring means.