JPS6233363B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an asphalt mixture processing apparatus.

Traditionally, asphalt mixture used for road paving was discarded as waste when renovations were needed. However, such disposal of asphalt waste not only causes economic loss but also causes a type of pollution.

The purpose of the present invention is to take these circumstances into consideration,
Asphalt mixture processing that enables the effective reuse of asphalt mixtures used for Itsutan pavement, etc., without discarding them as asphalt waste, and automatically producing asphalt mixtures with various particle size compositions that have high usability value. The goal is to provide equipment.

The gist of the present invention is to provide a tank that can hold water up to a predetermined level and into which asphalt waste can be inserted from above, a porous pipe disposed inside the tank, and a high-temperature, high-pressure steam pipe installed in the porous pipe. a boiler that supplies water, a separation device that is installed at the bottom of the tank and separates the asphalt waste aggregate that has been heated and softened in the water in the tank by steam from a porous pipe; a hot elevator that transports the asphalt mixture whose aggregates have been separated from each other upward; a sorting device such as a screen that sorts the transported asphalt mixture by size; A plurality of feeder hoppers for accommodating asphalt composite material of each predetermined size, a conveyance device connecting each of these feeder hoppers and each sorting point of the sorting device, and a conveyor device disposed below the feeder hoppers to connect the feeder hoppers to the respective sorting points of the sorting device. It is characterized by being equipped with a conveyor that receives and conveys asphalt mixture, and a control device that selectively takes out asphalt mixture from a suitable one of the feeder hoppers to obtain an asphalt mixture with a desired mixing ratio. Asphalt mixture processing equipment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an asphalt mixture processing apparatus according to the present invention will be described below with reference to the drawings.

In the illustrated example, two tanks 10, 12 are used, but three or more tanks or one tank may be used. These tanks 10,
12 is connected to a hot elevator 14.
A screen 16 is arranged at the tip of the hot elevator 14 as an example of a sorting device. tank 1
0 and 12 are connected to a drive source 18, and a control device 20 controls the drive source 18. Further, a boiler 24 for sending high-temperature, high-pressure steam is connected to the tank 10, and a boiler 22 for sending high-pressure, high-temperature steam is also connected to the tank 12. both tanks 10,
It is also possible to use one common boiler for 12.

With reference to FIG. 2, important points of the configuration described above will be explained in more detail.

A plurality of pipes 26 are connected to the boiler 22, some of which extend into the tank 12.

A separator 28 is provided at the bottom of the tank 12. In the illustrated example, the separation device 28 is of a screw type, and the aggregates are separated from each other while the treated material (that is, softened asphalt waste material) moves from left to right in the figure.

The symbol x indicates the water surface. The hot elevator 14 and the tank 12 are connected by a pipe 26, and the water surface x is between the tank 12 and the hot elevator 14.
are at the same level within.

When in use, asphalt waste is inserted from above the tank 12, heated to a predetermined temperature in high-temperature water, and then the screw 28 is used to separate the softened asphalt waste aggregates from each other. The recycled asphalt mixture thus separated and recycled is transferred to the hot elevator 1.
4 to the upper part, and then conveyed to the upper part by screen 1.
6, where they are sorted into various particle sizes.

The temperature of the water is usually preferably 80°C to 100°C, and optimally around 90°C. (These temperatures may change under high pressure conditions or other special environments.) Note that the separation device 28 may be of a type other than a screw type.

Further, the sorting device 16 preferably has a diameter of 20 mm to 13 mm.
Then, the aggregate will be sorted into four types of aggregate groups: 13 mm to 5 mm, 5 mm to 2.5 mm, and 2.5 mm or less. Needless to say, other selection methods are also possible.

FIG. 1 will be explained again. screen 1
Recycled asphalt mixture selected by No. 6 (i.e., each aggregate has an asphalt coating on the surface,
and non-adhesive to each other) are transferred to respective feeder hoppers. That is, the feeder hopper 32 is filled with aggregate having a particle size of 20 mm to 13 mm. The feeder hopper 34 is filled with aggregate with a grain size of 13 mm to 5 mm. 5 for feeder hopper 36
Add aggregate with a grain size of mm to 2.5 mm. Fill feeder hopper 38 with aggregate with a particle size of 2.5 mm or less. Similarly, feeder hoppers 40, 42, 44,
46 contains aggregates with particle sizes of 20 mm to 13 mm, 13 mm to 5 mm, 5 mm to 2.5 mm, and 2.5 mm or less, respectively.

The feeder hoppers 32, 34, 36, 38 have
One common conveyor 41 is provided. This conveyor 41 is controlled by a control signal from the control device 20.
It is possible to move in any direction, both to the right and to the left.

This conveyor 41 is provided with a feeder hopper 47 as a reserve. This preliminary feeder hopper 47 is for receiving a suitable mixture. Of course, the preliminary feeder hopper 47 is 1
Instead of one, a plurality of them may be provided.

A dry asphalt mixing device 43 for room temperature use is provided at one end of the conveyor 41. This normal temperature dry asphalt blending device 43 further includes a conveyor 4.
5 is connected to a room temperature pug mill mixer 48. This mixer 48 is connected to a normal temperature asphalt mixture storage device 52 by a conveyor 50. The room temperature asphalt mixture can be taken out from the storage device 52 as needed. On the other hand, at the other end of the conveyor 41, various heating dry asphalt blending devices 54 are provided.
This various heating dry asphalt blending device 54
is connected to a dry mixer 58 via a conveyor 56. This dry mixer 58 is connected to a surge tank 62 via a conveyor 60. Asphalt mixture for heating can be taken out from this serge tank 62 as needed.

Note that aggregates with a size of 20 mm or more are taken out in the direction of arrow 64.

The feeder hoppers 32, 34, 36, 38 have
Valves 32a, 34a, 36a, 38a, respectively
is provided. These valves 32a, 34a,
By controlling 36a and 38a with the control device 20, various blending ratios of the asphalt mixture can be freely selected.

Also, feeder hoppers 40, 42, 44, 46
The asphalt mixture of uniform size can be taken out as it is, and valve 4
It has 0a to 46a.

Since the present invention has the above-described configuration, the following remarkable effects can be obtained.

In the present invention, each sorting point of the sorting device and a plurality of feeder hoppers are connected by a conveying device (for example, a conveyor), and these feeder hoppers accommodate aggregates of predetermined sizes sorted by the sorting points. This makes it extremely easy to manufacture asphalt mixtures with various particle size compositions.

In the present invention, a conveyor is further provided below the feeder hoppers to receive the asphalt mixture falling from the feeder hoppers and convey it in a predetermined direction, so that mixing can be performed quickly.

Furthermore, what should be noted is that the operation of the feeder hoppers is automatically controlled to selectively take out a desired amount of asphalt mixture from a suitable feeder hopper to obtain an asphalt mixture with a desired blending ratio. A control device is installed to By providing such a control device, it is possible to automatically produce qualitatively more advanced and highly reliable asphalt composite materials with various particle size compositions. This point is particularly important in the case of recycled asphalt composite material.

According to the present invention, high-quality asphalt mixture can be automatically produced by classifying recycled asphalt mixture into several particle sizes and skillfully combining them with a plurality of related devices as described above. It has now become possible to obtain large quantities of various particle size formulations.

For recycled asphalt mixture, the throughput and quality are extremely important, and the present invention has the remarkable effect of reliably increasing the throughput and improving the quality.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of an asphalt mixture processing apparatus according to the present invention. Figure 2 shows the first
FIG. 2 is a longitudinal sectional view showing a part of the asphalt mixture processing apparatus shown in the figure. 10, 12...Tank, 14...Hot elevator, 16...Screen, 20...Control device,
22, 24... Boiler, 28... Separation device, 3
0... Water, 32, 34, 36, 38... Feeder hopper, 32a, 34a, 36a, 38a... Valve, 40, 42, 44, 46, 47... Feeder hopper, 43... Dry asphalt blending device for room temperature, 41, 45, 50, 56, 60...Conveyor, 48...Pug mill mixer for room temperature, 52...
Storage device, 54... Dry asphalt blending device for heating, 58... Dry mixer, 62... Surge tank.

Claims (1)

[Claims] 1 A tank that can hold water up to a predetermined level and into which asphalt waste can be inserted from above,
A porous pipe installed inside the tank, a boiler that supplies high-temperature, high-pressure steam to the perforated pipe, and a boiler installed at the bottom of the tank that uses the steam from the perforated pipe to heat the water inside the tank. a separation device that separates the asphalt waste aggregates that have been heated and softened by the separation device; a hot elevator that transports the asphalt mixture upwards from which the aggregates have been separated by the separation device; and A sorting device such as a screen that sorts materials by size, a plurality of feeder hoppers that accommodate each size of asphalt mixture thus sorted for each predetermined size, and each of these feeder hoppers and each sorting point of the sorting device. a conveyor connected to the feeder hoppers, a conveyor disposed below these feeder hoppers to receive and convey the asphalt mixture from the feeder hoppers, and a conveyor that selectively takes out the asphalt mixture from an appropriate one of the feeder hoppers. An asphalt mixture processing device comprising a control device for producing an asphalt mixture with a desired blending ratio.