JP4443384B2 - Manufacturing method and manufacturing apparatus for asphalt mixture - Google Patents

Description

  The present invention relates to a method and an apparatus for producing an asphalt mixture which is a road pavement material, and more particularly to a method and an apparatus for producing an ordinary temperature mixture and an intermediate temperature mixture.

In the conventional asphalt mixture manufacturing method, the aggregate is heated and dried at around 160 ° C. with a dryer of an asphalt plant, and then sieved to a predetermined particle size with a vibrating sieve and stored in an aggregate storage bottle. In general, heated aggregate having a desired particle diameter is discharged from a storage bottle, and a predetermined amount is weighed in a measuring tank, and then charged into a mixer, and mixed and adjusted by adding asphalt. In addition to this general asphalt mixture, there are an ordinary temperature mixture and an intermediate temperature mixture produced by heating an aggregate at a temperature lower than 160 ° C. with an asphalt plant dryer (Patent Document 1).
JP 2001-181510 A

  However, if the aggregate is stored in an aggregate storage bin at about 160 ° C. in order to produce a general asphalt mixture as described above, an aggregate with a low aggregate temperature such as a normal temperature mixture or a medium temperature mixture is used. There was a problem that the mixture using the product could not be shipped immediately.

  Therefore, in view of the above points, the present invention has an object to provide a method and apparatus for producing an asphalt mixture that can immediately ship not only a normal mixture but also a normal temperature mixture and a medium temperature mixture.

In order to solve the above-described problems, the asphalt mixture manufacturing apparatus of the present invention stores an asphalt mixture manufactured in an asphalt plant and stores and adjusts the temperature of the mixture, and adjusts the temperature of the asphalt mixture. A cold aggregate supply facility for storing and supplying a cold aggregate for use in the storage / mixing adjustment facility, a storage silo for storing an asphalt mixture, and a measuring tank disposed under the storage silo, In addition to a mixer disposed below the measuring tank and an additive supply device for supplying the additive into the mixer, the cold aggregate supply facility stores cold aggregates of various particle sizes. a plurality of aggregate hopper, a conveying means for conveying the cold aggregate of desired particle size paid out from said aggregate hopper according to the formulation of the mixture to be shipped, the surge of storing cold aggregate to transport by said transport means Emissions and, and a metering tank disposed below the discriminated surge bin, and asphalt mixture payout from the storage silo, the payout was a cold aggregate from the surge bin of a desired temperature and mixed at a predetermined ratio in the mixer It is characterized by being configured to produce an asphalt mixture.

According to the present invention, a storage / mixing adjustment facility for storing an asphalt mixture produced in an asphalt plant and adjusting the temperature of the mixture, and a cold aggregate for storing and supplying cold aggregate for adjusting the temperature of the asphalt mixture and a supply system, wherein the storage and mixing adjustment facilities, and storage silos for storing an asphalt mixture, and measuring tank which is disposed in the lower reservoir silo, a mixer is disposed in the lower metering chamber, said In addition to an additive supply device that supplies the additive into the mixer, the cold aggregate supply facility includes a plurality of aggregate hoppers that store cold aggregates of various particle sizes, and a mixture to be shipped. Accordingly, a conveying means for conveying the cold aggregate having a desired particle size paid out from the aggregate hopper, a surge bin for storing the cold aggregate conveyed by the conveying means , and a weighing tank disposed below the surge bin. Preparation The asphalt mixture payout from the storage silo, since the payout was a cold aggregate from the surge bin and configured to produce the asphalt mixture of the desired temperature and mixed at a predetermined ratio in the mixer, usually a mixture of course, A room temperature mixture and a medium temperature mixture can also be shipped immediately.

  According to the present invention, a storage silo for storing an asphalt mixture, a weighing tank disposed below the storage silo, a mixer disposed below the weighing tank, and an additive supplied to the mixer And an additive supply device. Furthermore, the side part of the said storage silo is equipped with the surge bin which stores a cold aggregate, and the measurement tank arrange | positioned under this surge bin.

  First, an asphalt mixture at about 160 ° C. is manufactured in an asphalt plant, and this asphalt mixture is transferred to a storage silo by a transfer means and stored. And when manufacturing a normal temperature mixture or a medium temperature mixture, the cold aggregate of a desired particle size is stored in a surge bin according to the mixing | blending of the mixture to ship. A predetermined amount of the asphalt mixture discharged from the storage silo is weighed in a measuring tank and charged into the mixer, and the cold aggregate is discharged from the surge bin and measured in a measuring tank and charged into the mixer. Adjust the asphalt mixture to the desired temperature while mixing in

  In this way, the asphalt mixture at about 160 ° C. stored in the storage silo and the cold aggregate stored in the surge bin are charged into the mixer at a predetermined ratio and mixed to produce an asphalt mixture at a desired temperature. Of course, a room temperature mixture or a medium temperature mixture can also be shipped immediately.

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

  1 in FIG. 1 is a known asphalt plant, a dryer 2 for heating and drying the aggregate, a dust collector (not shown) that captures dust scattered from the dryer 2, storing and weighing the heated aggregate, It consists of the plant body 3 to be mixed and other incidental equipment.

  The dryer 2 rotatably supports a cylindrical drum having a large number of scraping blades around its inner periphery, and the aggregate supplied from the aggregate hopper 4 via the belt conveyor 5 is scraped by the scraping blades. The aggregate is heated to a desired temperature while being brought into contact with hot air fed from the burner 6 while rolling down in the drum while being scraped and dropped, and then supplied to the plant body 3 via the bucket elevator 7. .

  The plant body 3 includes an aggregate storage bin 9 provided with a vibrating sieve 8 that screens the heated aggregate supplied from the bucket elevator 7 according to particle size, a stone powder storage bin 11 that stores stone powder supplied from the stone powder elevator 10, and these It is composed of an aggregate measuring tank 12, a stone powder measuring tank 13, an asphalt measuring tank 14, a mixer 15 and the like disposed below the storage bin.

  Reference numeral 16 denotes a storage / mixing adjustment facility for storing the asphalt mixture, and further adjusting the temperature of the mixture. The storage silo 17 has a heat insulation structure for storing the asphalt mixture, and the asphalt mixture manufactured in the asphalt plant 1 It is transferred by the moving trolley 18 and further transferred to the storage silo 17 by the transfer bucket 20 of the skip elevator 19 for storage. Below the storage silo 17, a measuring tank 21 and a mixer 22 are provided, and an additive supply device 23 for supplying the additive is provided. The additive supply device 23 includes an additive tank 24, supplies the additive tank 24 via the pump 25, supplies the additive toward the mixer 22 by driving the pump 27 at a predetermined timing.

  The storage / mixing adjustment facility 16 includes a cold aggregate supply facility 28 for supplying a cold aggregate for adjusting the temperature of the mixture. The cold aggregate supply equipment 28 includes an aggregate hopper 29 that stores cold aggregates of various particle sizes, a belt conveyor 30 that delivers and transports the cold aggregate from the aggregate hopper 29, and a bucket that lifts the cold aggregate upward. An elevator 31, a surge bin 32 for temporarily storing the cold aggregate, and a measuring tank 33 for measuring the cold aggregate taken out from the surge bin 32 are provided.

  Next, a method for producing a room temperature mixture or a medium temperature mixture will be described. First, a desired asphalt mixture is produced in the asphalt plant 1. In this case, the desired aggregate is cut out from the aggregate hopper 4, heated to about 160 ° C. by the dryer 2, lifted to the upper part of the plant body 3 by the bucket elevator 7, and sieved by the vibrating sieve 8 to store the aggregate. The bottle 9 is temporarily stored for each particle size. Then, the heated aggregate having a desired particle diameter is dispensed from the aggregate storage bin 9 and weighed in an aggregate measuring tank 12, and a predetermined amount of stone powder and asphalt is measured in a stone powder measuring tank 13 and an asphalt measuring tank 14, and then a mixer. 15 is sequentially added and mixed to produce an asphalt mixture having a desired composition.

  The manufactured asphalt mixture is loaded on the mobile trolley 18 waiting at the lower part of the mixer 15, transported to the storage / mixing adjustment equipment 16 side, loaded on the transfer bucket 20 of the skip elevator 19, transferred to the storage silo 17 and stored. I will do it.

  Further, a desired cold aggregate is dispensed from the aggregate hopper 29 and stored in the surge bin 32 via the belt conveyor 30 and the bucket conveyor 31. Then, according to the shipping instruction for the normal temperature mixture or the intermediate temperature mixture, the asphalt mixture is discharged from the storage silo 17 and weighed in the measuring tank 21 and then charged into the mixer 22, and the cold aggregate is discharged from the surge bin 32 and the measuring tank 33. A predetermined amount is weighed and put into the mixer 22. Then, as required, a predetermined amount of additive is measured in the measuring tank 26, and then added to the mixer 22 and mixed to produce an asphalt mixture at a desired temperature.

  When the mixture temperature is adjusted by the mixer 22, for example, the temperature is adjusted to about 80 to 90 ° C. for the normal temperature mixture and about 130 ° C. for the medium temperature mixture, and the cold aggregate mixed with the heated aggregate is used. This is done by appropriately adjusting the charging rate of.

  In this manner, the storage silo 17 stores an asphalt mixture at about 160 ° C., and a normal mixture at 160 ° C. can be shipped, and a predetermined amount of cold aggregate is mixed in the mixer 22 to lower the mixture temperature. As a result, room temperature and medium temperature mixtures can be shipped immediately.

  In the above-described embodiment, the asphalt plant 1 and the storage / mixing adjustment facility 16 are installed on the same site. However, the asphalt mixture manufactured in the asphalt plant 1 installed in different places is stored and mixed by the transport vehicle. You may carry to the factory which installed the adjustment equipment 16.

It is explanatory drawing which shows one Example of the asphalt mixture manufacturing apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Asphalt plant 16 ... Storage / mixing adjustment equipment 17 ... Storage silo 18 ... Moving trolley 19 ... Skip elevator 21 ... Measuring tank 22 ... Mixer 23 ... Additive supply device 26 ... Measuring tank (additive) 28 ... Cold aggregate supply Equipment 29 ... Aggregate hopper 31 ... Bucket elevator 32 ... Surge bin 33 ... Measuring tank

Claims (2)

Storage / mixing adjustment equipment for storing the asphalt mixture produced in the asphalt plant and adjusting the temperature of the mixture, and cold aggregate supply equipment for storing and supplying cold aggregates of various particle sizes for temperature adjustment of the asphalt mixture The asphalt mixture produced in the asphalt plant is temporarily stored in a storage silo provided in the storage / mixing adjustment facility, and a plurality of bones provided in the cold aggregate supply facility according to the composition of the mixture to be shipped. A cold aggregate having a desired particle size is discharged from a material hopper and stored in a surge bin, and when the mixture is shipped, a predetermined amount of the asphalt mixture discharged from the storage silo is weighed and put into a mixer, and the desired particle size is discharged from the surge bin. It was charged to a mixer and dispensing the cold aggregate at a predetermined ratio, the desired temperature asphalt mixture during mixing in a mixer Method for producing asphalt mixture, characterized in that so as to adjust. A storage / mixing adjustment facility for storing the asphalt mixture produced in the asphalt plant and adjusting the temperature of the mixture, and a cold aggregate supply facility for storing and supplying cold aggregate for adjusting the temperature of the asphalt mixture, The storage / mixing adjustment equipment includes a storage silo for storing an asphalt mixture, a weighing tank disposed under the storage silo, a mixer disposed under the weighing tank, and an addition toward the mixer. An additive supply device for supplying the agent, and the cold aggregate supply facility includes a plurality of aggregate hoppers for storing cold aggregates of various particle sizes, and the aggregate hopper according to the composition of the mixture to be shipped comprising conveying means for conveying the cold aggregate of desired particle diameter out more paid, the surge bin for storing cold aggregate that conveyed by the conveying means, and a metering tank disposed below the discriminated surge bin, the storage site Asphalt mixture payout from apparatus for producing asphalt mixture, characterized in that the cold aggregate that payout from the surge bin and configured to produce the asphalt mixture of the desired temperature and mixed at a predetermined ratio in the mixer.

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