JPH0885911A - Asphalt mix manufacturing device - Google Patents

Abstract

PURPOSE: To reduce costs of a device capable of manufacturing both of ordinary mix and special mix. CONSTITUTION: An aggregate storage bin 9 for special mix and an aggregate storage bin 14 for ordinary mix are juxtaposed. Out of these two storage bins 9, 14, a vibration sieve 8 is mounted on the storage bin 9 for special mix and underneath the vibration sieve 8, a receiving hopper 10 for receiving sifted aggregate is arranged. An aggregate delivery gate 11 is arranged in two directions under the receiving hopper 10, and aggregate delivered from one side aggregate delivery gate 12 for special mix is dropped into the underneath aggregate storage bin 9 for special mix, while aggregate delivered from the other aggregate delivery gate 13 for ordinary mix is dropped into the aggregate storage bin 14 for ordinary mix via a distribution chute 15. With this constitution, aggregate is sifted and stored in the two aggregate storage bins 9, 14 by means of the single vibration sieve 8 and equipment costs can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt mixture manufacturing apparatus for manufacturing an asphalt mixture as a road paving material, and more particularly to an asphalt mixture manufacturing apparatus for producing a special asphalt mixture.

[0002]

2. Description of the Related Art Recently, asphalt composite materials have been diversified according to their use applications, and for example, asphalt composite materials such as drainage asphalt that allow rainwater collected on the surface of highways to permeate downward and drain to the roadbed. As a result, many special asphalt mixes (hereinafter referred to as "special mixes") are being manufactured.

And, in the drainage asphalt mixture,
As specially used two kinds of aggregates of 13 mm particle size aggregate and sand, asphalt mixture (hereinafter referred to as "ordinary mixture") is commonly used in the special mixture Since it is often different from the structure described above, it is necessary to handle the aggregates to be used by distinguishing between the special mixture and the ordinary mixture when the special mixture is to be manufactured.

Therefore, in order to manufacture the special composite material and the normal composite material, a plant capable of storing two kinds of aggregates is required. And as a thing close to it, Kaikaihei 6-43008
There is an asphalt plant disclosed in the publication,
This asphalt plant is intended to double the production capacity, beside the first mixing tower with vibrating screen, aggregate storage bin, metering tank and mixer, vibrating screen, aggregate storage bin, metering A second mixing tower equipped with a tank and a mixer was installed in parallel, and the aggregate dried by heating and drying by a dryer was lifted by a bucket elevator and the supply direction of the heated aggregate was changed by a switching chute arranged below the discharge chute of the bucket elevator. Switch to first mixing tower and second
I am trying to supply it to the mixing tower. It is considered that if either one of the mixing towers is used for manufacturing the special composite material, both the special composite material and the normal composite material can be manufactured.

[0005]

However, in the case of producing a special mixture using the above-mentioned conventional apparatus, both of the two mixing towers are equipped with a vibrating screen and are lifted by a bucket elevator by a switching chute. Considering that the heated aggregate is distributed to either the first or second mixing tower, only the vibrating sieve of the mixing tower on the side where the aggregate is supplied is operated, and one vibrating sieve is You will have to rest.

[0006] It is uneconomical to mount the vibrating sieve, which can be operated only in one side, on each of the two mixing towers, thus increasing the initial cost of the apparatus.

In view of the above points, an object of the present invention is to provide an asphalt composite material manufacturing apparatus which can reduce the cost of the apparatus which can manufacture both ordinary composite material and special composite material.

[0008]

In order to achieve the above-mentioned object, the present invention has two aggregate storage bins for storing heated aggregates arranged in parallel, and the aggregates are provided under each aggregate storage bin. While arranging a measuring tank and a mixer, a vibrating sieve is mounted on one of the two aggregate storage bins, and the sieved aggregate is placed below the vibrating sieve and the lower aggregate storage bin or It is characterized in that a allocating means for allocating to any of the adjacent aggregate storage bins not equipped with a vibrating sieve is provided.

[0009]

According to the asphalt mixture manufacturing apparatus of the present invention,
When different types of aggregates are stored in two aggregate storage bins, the aggregates are supplied to the side of the aggregate storage bin equipped with the vibrating screen. Then, the aggregate sieved by the vibrating sieve is directly put into the lower aggregate storage bin by the selecting operation of the sorting means, or is put into the other adjacent aggregate storage bin side which is not equipped with the vibrating sieve. To do.

As a result, different kinds of aggregates can be sieved by one vibrating sieve and can be sorted and stored in each of the two aggregate storage bins by the sorting means. The aggregate for special mixture can be stored in one of the above, and the aggregate for ordinary mixture can be stored in the other one. Therefore, it is possible to store in two aggregate storage bins with one vibrating sieve, and it is possible to configure an asphalt mixture manufacturing device that can manufacture both ordinary mix and special mix in parallel, reducing the device cost. Can be realized.

[0011]

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

Reference numeral 1 is a known asphalt plant dryer, in which hot air is sent from a burner 3 into a drum 2 which is rotatably supported by an inclination, and the hot air is exhausted by an exhaust fan (not shown) downstream of an exhaust flue 4. While maintaining a high-temperature gas flow that sucks and passes through the drum 2, the aggregate is discharged at a predetermined ratio from an aggregate hopper (not shown) that stores the aggregate according to various particle sizes, and the aggregate is discharged into the drum 2 via the conveyor 5. While the aggregate is being fed and the aggregate is being scraped by the scraping blades in the drum 2, the aggregate is heated to a desired temperature while rolling down toward the discharge side.

The heated aggregate discharged from the dryer 1 is lifted up to the uppermost part of the plant body 7 by the bucket elevator 6 and put into a vibrating sieve 8 which sifts the aggregate according to the grain size. Below the vibrating screen 8, an aggregate storage bin 9 for special mixture used for storing the aggregate for special mixture used for the production of the special mixture is arranged.

A vibrating screen 8 is provided in the aggregate storage bin 9 for the special mixture.
Receiving hopper 10 that receives the aggregate that has been sieved by the
And a plurality of compartments 10a to 1 in the receiving hopper 10 for receiving aggregates sieved according to grain size according to grain size.
0d is formed. At the bottom of each compartment 10a to 10d, an aggregate delivery gate 11 for delivering the aggregates falling into the compartments to two storage bins in two directions is arranged. The one is a special mixture aggregate discharging gate 12 for discharging the special mixture aggregate, and the other is a normal mixture aggregate discharging gate 13 for discharging the normal mixture aggregate.

The aggregate discharge gate 12 for the special mixture faces the lower-level aggregate storage bin 9 for the special mixture, and the aggregate discharge gate 13 for the ordinary mixture includes the aggregate storage bin 9 for the special mixture. It is made to face one end of a distribution chute 15 which is connected to the aggregate storage bin 14 for normal mixture and which is provided in parallel with the aggregate storage bin 9 for special mixture.

Below the special compound aggregate storage bin 9, the stone powder stored in the aggregate measuring tank 16 for measuring the aggregate discharged from the special mixture aggregate storage bin 9 or the stone powder storage bin 17 is measured. A stone powder measuring tank 18 and an asphalt measuring tank 19 are arranged, and a mixer 20 for mixing the measured materials to manufacture a special mixture is arranged below these.

Below the ordinary-mixture aggregate storage bin 14, the stone powder stored in the aggregate-measuring tank 21 or the stone-dust storage bin 22 for measuring the aggregate discharged from the ordinary-mixture aggregate storage bin 14 is stored. A stone powder measuring tank 23 for measuring and an asphalt measuring tank 24 are arranged, and a mixer 25 for mixing the measured materials to produce a normal mixture is arranged below them.

Therefore, when a special mixture is manufactured by the asphalt mixture manufacturing apparatus of the present invention, the aggregate discharge gate 11 for the special mixture is discharged from the aggregate discharge gate 11 arranged in the receiving hopper 10 of the vibrating screen 8. The gate 12 is left open, the aggregate for special mixture is heated by the dryer 1, and lifted to the upper part of the plant body 7 by the bucket elevator 6.

Then, the aggregate lifted up by the bucket elevator 6 is supplied to the vibrating sieve 8 mounted on the upper side of the aggregate storage bin 9 for the special mixture, where it is sorted by particle size and dropped into the lower receiving hopper 10. The aggregate dropped into the receiving hopper 10 is the opened aggregate discharge gate 1 for the special mixture.
After passing through 2, it is directly stored in the lower aggregate storage bin 9 for special mixture.

When there is a request for shipment of the special mixture, the aggregate stored in the aggregate storage bin 9 for the special mixture is discharged based on a predetermined composition and measured by the aggregate measuring tank 16 and the stone powder measuring tank 18 and It is put into the mixer 20 together with other materials such as stone powder and asphalt measured by the asphalt measuring tank 19 and mixed for a predetermined time to manufacture a special mixture.

Further, in the case of manufacturing the ordinary mixture, the aggregate discharging gate 13 for the ordinary mixture among the aggregate discharging gates 11 of the receiving hopper 10 is opened, and the dryer 1 is used for the ordinary mixture. The aggregate is heated and lifted to the upper part of the plant body 7 by the bucket elevator 6 in the same manner as described above, sieved according to the particle size through the vibrating sieve 8 and dropped into the receiving hopper 10, and the aggregate discharge gate 13 for the open ordinary mixture is opened. And pass it to the sorting chute 15. The aggregate for normal mixture discharged to the distribution chute 15 is made to flow down through the distribution chute 15, and is put into the aggregate storage bin 14 for normal mixture arranged in parallel with the aggregate storage bin 9 for special mixture for storage. .

When there is a request for shipment of the ordinary mixture, the aggregate stored in the aggregate storage bin 14 for the ordinary mixture is discharged based on a predetermined composition and measured by the aggregate measuring tank 21.
Stone powder, asphalt measured by the stone powder measuring tank 23 and the asphalt measuring tank 24, and other materials such as asphalt are charged into the mixer 25 and mixed for a predetermined time to produce a normal mixture.

When it is planned to manufacture the ordinary mixture and the special mixture at the same time, the aggregate for the special mixture is stored in advance in the aggregate storage bin 9 for the special mixture or in an appropriate amount.
When manufacturing the ordinary mixture, the aggregate discharging gate 13 for the ordinary mixture is opened, and the aggregate for the ordinary mixture is manufactured by flowing the aggregate for the ordinary mixture to the aggregate storage bin 14 for the ordinary mixture. I will go.

Then, if there is a request for shipping the special mixture, the aggregate stored in the aggregate storage bin 9 for the special mixture is discharged to manufacture the special mixture. Since the aggregate storage bin 9 for the special mixture has a large capacity and a small production amount, both the mixture can be sufficiently produced in parallel by such a method. Then, when the shipment of the ordinary mixture is interrupted, the aggregate is supplied to the aggregate storage bin 9 for the special mixture. In addition, when the aggregate is stored in the aggregate storage bin 9 for a special mixture for a long time in this way, it is preferable that the storage bin has a heat retaining structure so as not to lower the temperature of the aggregate.

In this embodiment, the aggregate dispensing gate 11 for dispensing the aggregate into two storage bins has been described as a means for distributing the aggregate, but a sorter such as a sorting damper rotating about the lower end as a fulcrum. May be used for sorting. In addition, although the bin with a large capacity of the aggregate storage bin is used for storing the aggregate for the special mixture, this is a convenient selection for the shipping method described above, and the bones for the two storage bins are stored. There is no problem even if the storage of the material type is reversed.

Further, not only the ordinary composite material and the special composite material are manufactured by separately storing the different kinds of aggregate material in the two aggregate material storage bins, but also only the ordinary composite material or the special composite material is stored. When the same kind of aggregate is supplied and stored in two aggregate storage bins at the time of shipping, the mixture can be simultaneously shipped from both, and the production capacity of the mixture can be doubled. . As described above, since a single vibrating screen is provided while exhibiting substantially the same effect as the device described in the conventional example, the cost can be reduced as compared with the conventional device. Therefore, the present invention aims to reduce the cost of an apparatus capable of producing both a normal mixture and a special mixture, but an object thereof is to reduce the cost of a conventional apparatus that doubles the production capacity. Of course, you can also do it.

Further, in the present invention, the aggregate storage bin is not divided into a structure for storing ordinary aggregates and special aggregates, but the aggregate storage bin 14 for ordinary mixture and the special aggregate Since the aggregate storage bins 9 are installed separately from each other, the storage capacity can be increased, and a sufficient distance can be provided between the mixers 20 and 25, so that the transport vehicle can smoothly enter and exit.

[0028]

As described above, in the asphalt composite material manufacturing apparatus according to the present invention, two aggregate storage bins for storing heated aggregates are arranged in parallel, and the aggregate storage bins are placed under the respective aggregate storage bins. While arranging the aggregate measuring tank and the mixer, one of the two aggregate storage bins arranged side by side is equipped with the vibrating screen 8 and the vibrating screen 8 is installed.
Since a distribution means for allocating the flow of aggregate is arranged in the lower part of the above, the aggregate can be supplied to either the lower aggregate storage bin or the other aggregate storage bin arranged in parallel. The two types of aggregates, one for use in aggregate and one for ordinary mix, are sieved with a configuration of one vibrating sieve 8 and two aggregate storage bins.
It is possible to store, and thus it is possible to reduce the initial cost of an apparatus capable of manufacturing both a normal mixture and a special mixture or an apparatus for doubling the production capacity of the same mixture.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram in which a part of an asphalt mixture manufacturing apparatus of the present invention is cut away.

FIG. 2 is a perspective view in which a vicinity of a lower receiving hopper of a vibrating screen is enlarged and a part is cut away.

[Explanation of symbols]

8 ... Vibrating screen 9 ... Aggregate storage bin for special mix 10 ... Receiving hopper 12 ... Aggregate discharge gate for special mix 13 ... Aggregate discharge gate for normal mix 14 ... Aggregate storage bin for normal mix 15 ... Sorting shoot

Claims (1)

[Claims] 1. Two aggregate storage bins for storing heated aggregate are arranged in parallel, and an aggregate measuring tank and a mixer are arranged below each of the aggregate storage bins, while the aggregate storage bin A vibrating sieve is installed in one of the two vibrating screens, and the classified aggregate is distributed to the lower part of the vibrating screen to either the lower aggregate storage bin or an adjacent aggregate storage bin not equipped with the vibrating sieve. An asphalt mixture manufacturing device characterized by having a distribution means.