JPS6133046Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for producing an asphalt mixture by mixing asphalt, aggregate, and stone powder (filler).

In general, a drum mixing plant, which is a type of equipment for producing asphalt mixtures, is equipped with a drum mixer that can freely rotate in the circumferential direction in an inclined position.While rotating this drum mixer, a burner installed at one end above the drum mixer Then,
The cold aggregate and stone powder fed into the drum mixer by a belt conveyor etc. are dried and heated in the first half, and the asphalt, aggregate and stone powder supplied to the drum mixer are mixed in the second half to produce an asphalt mixture. It is configured as follows.

However, when stone powder is fed into a drum mixer together with cold aggregate using a belt conveyor, etc., the stone powder may adhere to the belt conveyor and the required amount may not be supplied into the drum mixer, or the airflow within the drum mixer may cause asphalt to form. There is a problem that it can scatter without being mixed with the water and clog the filter of the exhaust system.

The present invention was developed in view of the above circumstances, and its purpose is to provide an asphalt mixture manufacturing device that can easily mix stone powder with asphalt and aggregate without scattering the stone powder. There is a particular thing.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

1 to 3 show an embodiment of the present invention, and reference numeral 1 in the figures indicates a drum mixer (rotating drum), and this drum mixer 1 is installed on a base 2 in an inclined manner so as to be freely rotatable in the circumferential direction. It is being
The inner wall of the drum mixer 1 is provided with flights 1a for scraping up aggregate, asphalt mixture, etc., and a dispersion cage 3 is provided in the center of the interior of the drum mixer 1.

Further, at the upper end of the drum mixer 1 (the left end in FIG. 1), an aggregate inlet 4 for introducing cold aggregate into the drum mixer 1 and a burner 5 for drying and heating the cold aggregate are provided. . The cold aggregate is stored in an aggregate hopper 6, and an aggregate feeder 7 is provided below the aggregate hopper 6. Then, aggregate feeder 7 and drum mixer 1
A scale conveyor 8 and a belt conveyor 9 are provided between the aggregate input port 4.

Further, a mixture discharge hopper 10 is provided at the lower end of the drum mixer 1, and a skip conveyor 11 is provided from below the mixture discharge hopper 10 to the upper end of the storage silo 12. Further, the upper part of the mixture discharge hopper 10 is connected to an exhaust device 13 through a duct 13a.

Furthermore, a transfer pipe 14 having a double pipe structure is provided extending from the lower end of the drum mixer 1 to the center of the interior of the drum mixer 1. The stone powder flows through the flow paths B, respectively, and the flow paths A,
The downwardly facing open ends 14a, 1 that almost coincide with each other in B
The asphalt and stone powder are discharged into the drum mixer 1 from 4b. The inner flow path A of the transfer pipe 14 is connected to an asphalt tank 17 via a flow meter 15 and a pump 16, and the outer flow path B is connected to a filler tank 19 and a blower 20 via an ejector 18. There is.

The scale conveyor 8 is connected to a control device 21, and the weight data of the cold aggregate is transmitted to the control device 21.
is configured to be sent to. In addition, the flow meter 15, the control device 21, and the filler tank 19
The measuring device 22 and the control device 21 are electrically connected to each other, and the weight data of the asphalt and stone powder is sent to the control device 21.

Next, the operation of the asphalt mixture manufacturing apparatus configured as described above will be explained.

First, before charging cold aggregate into the drum mixer 1, the drum mixer 1 is rotated and the burner 5 is ignited to heat the inside of the drum mixer 1. Next, the cold aggregate in the aggregate hopper 6 is charged into the drum mixer 1 from the aggregate input port 4 via the aggregate feeder 7, the scale conveyor 8, and the belt conveyor 9. The charged cold aggregate is heated and dried by the heat of the burner 5 while being stirred as the drum mixer 1 rotates. The aggregate that has reached the dispersion cage 3 along the inclination of the drum mixer 1 is finely dispersed and dropped by the dispersion cage 3 to form a thick veil within the drum mixer 1.

Next, asphalt and stone powder are supplied to the aggregate that has passed through the dispersion cage 3 through a transfer pipe 14. At this time, asphalt tank 17
Asphalt is supplied from the filler tank 19 through a passage A on the inside of the transfer pipe 14 by a pump 16 and stone is supplied through a passage B on the outside of the transfer pipe 14 by a blower 20 from the filler tank 19. When the powder is discharged from the outlet of the transfer pipe 14, it sprinkles on the aggregate while mixing with each other. Therefore, there is no possibility that stone powder will be scattered inside the drum mixer 1 and sucked into the exhaust device 13.
The required measured amount of stone powder is reliably mixed with asphalt and aggregate to produce an asphalt mixture with a predetermined ratio. Then, the asphalt mixture is sequentially transferred to the lower end of the drum mixer 1 by the flight 1a, dropped into a hopper 10 for discharging the mixture, and further stored in a storage silo 12 via a skip conveyor 11.

In this embodiment, asphalt flows through the inner flow path A of the transfer pipe 14, and stone powder flows through the outer flow path B, but conversely, stone powder flows through the inner flow path A. , asphalt may be allowed to flow through the outer flow path B. Further, in this embodiment, the transfer pipe 14 with a double tube structure is used, but the transfer pipe 14 with a multi-tube structure may also be used.
Furthermore, as shown in FIG. 4, the flow paths A and B may be formed by a partition wall 14c.

As explained above, the present invention has a structure in which a single transfer pipe, which forms a channel for transferring stone powder into the rotating drum and a channel for transferring asphalt into the rotating drum, is connected to the rotating drum. At the outlet of the rotating drum, the stone powder is mixed with liquid asphalt flowing out from the vicinity, and is scattered on the aggregate along with the asphalt. Stone powder is not discharged outside and can be reliably and efficiently mixed with asphalt. Therefore, the stone dust will not clog the filter of the exhaust system, or it will not be mixed well with the asphalt and be exhausted, and the stone dust, asphalt, and bones will be mixed in a predetermined optimal ratio. It has the excellent effect of being able to produce an extremely high quality asphalt mixture by uniformly mixing the materials.

In addition, since the transfer pipe that supplies stone powder and asphalt into the rotating drum has an integrated structure, compared to the case where these transfer pipes are provided separately, there is no need for a reinforcing structure to support and fix the transfer pipe within the rotating drum. It is simple, the rotating drum structure is simple, and there are practical effects such as smooth movement of the asphalt mixture.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is an overall configuration diagram of an asphalt plant, Figure 2 is a cross-sectional view of a transfer pipe, and Figure 3 is a longitudinal cross-section of a transfer pipe. 4 are cross-sectional views of a transfer pipe showing another embodiment of the present invention. 1... Drum mixer (rotating drum), 5... Burner, 10... Mixture discharge hopper, 14... Transfer pipe, A, B... Channel, 14a, 14b...
Open end.

Claims (1)

[Scope of utility model claims] An asphalt mixture production device in which aggregate, stone powder, and asphalt are charged into a rotating drum equipped with a burner at one end and a discharge port at the other end, and heated and mixed in the rotating drum to produce an asphalt mixture. In the above, a single transfer pipe is formed by forming a channel for transferring the stone powder into the rotating drum and a channel for transferring the asphalt into the rotating drum so that their opening ends in the rotating drums are substantially coincident with each other. An asphalt mixture manufacturing apparatus, characterized in that it is connected to the above-mentioned rotating drum.