JP3461892B2 - Asphalt plant - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt plant for producing an asphalt mixture which is a road paving material,
In particular, it relates to an asphalt plant that also manufactures a special asphalt mixture such as colored pavement and anti-skid pavement.

[0002]

2. Description of the Related Art Asphalt mixture produced in an asphalt plant may be produced in a special way depending on its intended use. For example, in pedestrian road pavement, various types of asphalt mixture are used to create a landscape in a city. Colored colored pavement may be performed. The asphalt mixture-based colored pavement includes a method of adding a pigment such as red iron oxide to a heated asphalt mixture, a method of using a petroleum resin (decolorizing binder) instead of the asphalt of the heated asphalt mixture, and the like.

Conventionally, for example, in the method of adding pigment such as red iron oxide, the pigment packed in a predetermined amount is provided in the mixer side portion of the plant body, etc. The bag containing the pigment is opened and a predetermined amount is manually put into the mixer for each batch mixing. As described above, the special asphalt mixture produced by adding a special material (hereinafter, referred to as “special mixture”) is often produced by hand because the production amount thereof is still small.

[0004]

However, in recent years,
The amount of colored pavement is gradually increasing, and there are some places where it is not possible to meet the large demand by manually adding pigments as in the past. In addition, it is expected that the production of special mixtures will increase more and more in the future.

In view of the above points, it is an object of the present invention to provide an asphalt plant which is convenient for producing a special asphalt mixture in addition to the ordinary asphalt mixture.

[0006]

In order to achieve the above object, the present invention provides an asphalt plant according to claim 1 in which aggregate heated by a drier is sieved by a vibrating sieve and classified into aggregate storage bins by particle size. It is a raw material for producing a special asphalt mixture on the side of the plant body of an asphalt plant that stores and then discharges a predetermined amount of heated aggregate from the aggregate storage bin to a mixer and mixes it with asphalt and the like to produce an asphalt mixture. The special material storage tank for storing the special material, the measuring tank, and the special mixture manufacturing apparatus for manufacturing the special asphalt mixture equipped with the mixer are installed, and the inside of the aggregate storage bin of the plant body is
A partition plate is arranged in a direction orthogonal to each partition wall that divides the partition room, and each partition room of the aggregate storage bin is divided into two rooms, a general-purpose storage bin and a special-purpose storage bin, and the partition Distributing means for distributing and dropping aggregate falling from the vibrating sieve into one of the two chambers is installed above the plate, and heating aggregate from each compartment is located below the side surface of the special-purpose storage bin. A guide chute that is supplied to the side of the special mixture manufacturing apparatus that is installed on the side of the plant body, and the tip of the guide chute is installed in the special mixture manufacturing apparatus.
It is characterized by facing the measuring tank .

Further, in the asphalt plant according to a second aspect of the present invention, an aggregate extracting and supplying means for extracting the heated aggregate from each compartment of the general-purpose storage bin of the aggregate storage bin and supplying it to the special mixture manufacturing apparatus side is provided. It is characterized by having been set up.

[0008]

According to the asphalt plant according to claim 1 of the present invention, a special material storage tank for storing a special material as a material for producing a special asphalt mixture, a measuring tank, and a side portion of a plant body of the asphalt plant, Install special mixture manufacturing equipment equipped with mixer. And when manufacturing a special mixture, the sorting means arranged in the aggregate storage bin of the plant body is tilted in the direction in which the aggregate that falls from the vibrating sieve flows into the special-purpose storage bin side and is then placed in the special-purpose storage bin. Store the heated aggregate. Then, the stored heated aggregate is installed on the side of the plant body through the guide chute.
It is supplied to the placed special mixture manufacturing device side, after measuring a predetermined amount,
It is put into a mixer of a special mixture manufacturing apparatus, a special material is added, and asphalt or the like is further added to manufacture a desired special mixture.

In this way, the aggregate storage bin of the plant body is divided into two chambers for general use and special use, and the heated aggregate of the storage bin for special use is supplied to the special mixture manufacturing apparatus side. , It becomes a convenient plant that can produce both ordinary and special mixtures, and the shared storage bin also saves equipment costs.

According to the asphalt plant of the second aspect, since the heated aggregate can be extracted from each compartment of the general-purpose storage bin of the aggregate storage bin and supplied to the special mixture manufacturing apparatus side, The special mixture can be produced by using either the heated aggregate stored in the general-purpose storage bottle or the special-purpose storage bottle, and the production variety of the special mixture can be further expanded.

[0011]

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

First, referring to FIG. 1 and FIG. 2,
1 is a known asphalt plant dryer,
Hot air is sent from the burner 3 into the drum 2 which is rotatably supported by inclination, and the hot air is sucked by an exhaust fan (not shown) downstream of the exhaust flue 4 to maintain a high temperature gas flow passing through the drum 2. On the other hand, aggregate is discharged from an aggregate hopper (not shown) that stores aggregate according to various grain sizes at a predetermined ratio and is supplied into the drum 2 via the conveyor 5, and the aggregate is scraped by the scraping blades in the drum 2. While raising the temperature, it 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 sieves the aggregate according to the grain size. Below the vibrating screen 8, an aggregate storage bin 9 for storing the aggregate according to the grain size is arranged.

A partition plate 10 is arranged in the aggregate storage bin 9 in a direction parallel to the aggregate flow of the vibrating screen 8 to collect the aggregate storage bin 9.
Is divided into two rooms, a general-purpose storage bin 11 and a special-purpose storage bin 12, and the insides of the general-purpose storage bin 11 and the special-purpose storage bin 12 are appropriately partitioned to divide the general-purpose storage bin 11 into compartments. Compartments 11a, 11b, 11c, 11d and compartments 12a, 12b, 1 of special purpose storage bin 12
2c and 12d are formed.

The special-purpose storage bin 12 is provided with a guide chute 13 which is a special-purpose aggregate supplying means for extracting the heated aggregate from each compartment and supplying it to the special mixture manufacturing apparatus described later. The payout gates 14a, 14b, 14c, and 14d are attached to the tip portion thereof. Further, the inside of the guide chute 13 is partitioned by a partition plate 15 so that the heated aggregate is not mixed.

Further, a distribution damper 16 is arranged above the partition plate 10 as a means for distributing aggregates, and the distribution damper 16 is a plate-shaped damper which faces the lower surface of the vibrating screen 8. Partition plate 1 at its lower end
It is attached to the storage bin 11 for general use or to the storage bin 12 for special use by receiving the aggregate that falls from the vibrating screen 8 by pivoting around the axis of 0 and pivoting around this attaching part. I try to sort them out.

Then, 2.5 sieved by the vibrating sieve 8
mm or less sand, and 2.5 to 5 mm, 5 to 13 mm, 1
Crushed stone of 3 to 25 mm is stored in each compartment.

Below the aggregate storage bin 9, an aggregate measuring tank 17 for cumulatively measuring the aggregate, a stone powder measuring tank 19 for measuring the stone powder stored in the stone powder storage bottle 18, and an asphalt measuring tank for measuring the molten asphalt. 20 are provided.
Below these measuring tanks, a mixer 21 for mixing the materials weighed by the measuring tanks is arranged.

A special mixture production device 22 for producing a special mixture by adding a special material is installed on the side of the plant body 7.

The special mixture manufacturing apparatus 22 includes special material storage tanks 23a, 23 for storing special materials such as pigments and resin materials.
b ... is appropriately provided. For example, when manufacturing color pavement materials of various colors, the number of pigments that can store the number of colors is set. In addition to that, if a non-slip pavement material using a resin material is also manufactured, the number of storage tanks corresponding to the number of kinds of the resin material used will be provided.

The special materials are supplied to the special material storage tanks 23a, 23b, ... By an appropriate vertical transfer device 24 according to the property of the special material. Distributing means 26 such as a damper for allocating materials to the storage tanks is provided, or the vertical conveying devices 24 are installed in the number corresponding to the number of storage tanks.

27 is a stone powder storage bottle, 28 is a stone powder measuring tank,
Reference numeral 29 is an asphalt measuring tank, which is equipped with the same devices as the constituent elements of the plant body 7, and since it is adjacent to the plant body 7, it is possible to share sensible auxiliary equipment.

Reference numeral 30 denotes an aggregate storage bin 9 of the plant body 7 by means of a guide chute 13 which is a special purpose aggregate supply means.
It is a measuring tank for measuring the heated aggregate supplied from, and in the figure, the special material discharged from the special material storage tanks 23a and 23b is also cumulatively measured. The special material may be separately provided with a dedicated measuring tank.

Reference numeral 31 is a mixer for mixing the special mixture, which is installed under the respective measuring tanks 28, 29, 30 and has the same structure as the mixer 21 of the plant body 7, but the mixing capacity is used. Adopt an appropriate capacity considering frequency and economy.

Next, a method for producing a special mixture by the asphalt plant having the above structure will be described.

First, the sorting damper 16 of the aggregate storage bin 9 of the plant body 7 is operated to operate the special-purpose storage bin 1.
The heated aggregate is stored in the two compartments 12a, 12b, 12c, 12d. Then, the dispensing gates 14a, 14b, 14c, 14d are sequentially opened according to the composition of the mixture to be shipped, and the special mixture manufacturing apparatus 22 is provided through the guide chute 13.
To the measuring tank 30 of. When the cumulative weighing of the heated aggregate is completed in the weighing tank 30, the special material storage tanks 23a, 23b.
.. More desired special materials are discharged into the measuring tank 30, cumulatively weighed, and the cumulatively weighed materials are put into the mixer 31. In addition, stone powder measuring tank 28 and asphalt measuring tank 29
The stone powder and asphalt weighed in 1 are also sequentially charged into the mixer 31, and mixed and adjusted in the mixer 31 for a predetermined time to produce a desired special mixture.

Next, another embodiment will be described with reference to FIGS. The same reference numerals as those in FIGS. 1 and 2 indicate the same components, and the description thereof will be omitted.

Storage bin 11 for general use of aggregate storage bin 9
In order to extract the heated aggregate from the compartments 11a, 11b, 11c, 11d of the respective compartments 11a, 11b, 11c,
The discharge gate 32 is formed by opening an appropriate position on the side wall of 11d.
Discharge chute 3 provided with a, 32b, 32c, 32d
3a, 33b, 33c and 33d are attached. The discharge chutes 33a, 33b, 33c, 33d are guide chutes 1
The heated aggregate extracted so as to be housed in 3 can be supplied to the special mixture manufacturing apparatus 22 side. The guide chute 13 may be separately installed without being used in combination.

Discharge gates 34a, 34b, 34c, 34d are also provided in the compartments 12a, 12b, 12c, 12d of the special purpose storage bin 12 of the aggregate storage bin 9.

The guide chute 13 has level gauges 35a, 35b, 3 for detecting the amount of heated aggregate accumulated in the chute.
5c and 35d are attached, and this level meter 35a,
The installation positions of 35b, 35c, 35d are used for one batch production of special mixture when the heating aggregate is stored up to the positions of the level meters 35a, 35b, 35c, 35d with the payout gates 14a, 14b, 14c, 14d closed. It is installed at a position where it can store a little more than the amount of each heated aggregate.

The level meters 35a, 35b, 35c,
If the 35d position is set at a position where a slightly larger amount than the amount of each heated aggregate used for the production of one batch of the special mixture is stored, it is convenient because the amount to be extracted when the production of the special mixture is completed is small.

In this way, the level meters 35a, 35b, 35
If c and 35d are attached, after starting the shipment of the special mixture, the level gauges 35a, 35b, 35c, and 35d send an idle signal to heat the bone from the general-purpose storage bin 11 or the special-purpose storage bin 12 of the aggregate storage bin 9. Paying out the material,
In addition, the withdrawal will be stopped by the full transmission.

Next, a method for producing a special mixture by the asphalt plant having the above construction will be described.

When a special mixture is produced in the special mixture production apparatus 22, either heated aggregate for general purpose storage bin 11 of aggregate storage bin 9 or special purpose storage bin 12 can be dispensed. First of all, select which one to pay out.

For example, in the case of paying out from the general-purpose storage bin 11 side, desired compartments 11a, 11b, 11c, 11 of the general-purpose storage bin 11 according to a shipping start command.
The discharge gates 32a, 32b, 32c, 32d of d are opened and the heated aggregate is discharged into the guide chute 13. Then, when the heated aggregate accumulates up to the position of the level meters 35a, 35b, 35c, 35d and gives a full signal, the discharge gates 32a, 3
2b, 32c and 32d are closed.

Next, the payout gate 1 of the guide chute 13
4a, 14b, 14c, 14d are sequentially opened to open the measuring tank 3
The heated aggregate is put into 0 and a predetermined amount is cumulatively weighed.

The level meters 35a, 35b, 35c, 35d are provided by paying out the heated aggregate in the guide chute 13.
Emits an empty signal, the discharge gates 32a, 32b, 32
c, 32d are opened, the heated aggregate in the aggregate storage bin 9 is discharged into the guide chute 13, and the level meters 35a, 3
It is replenished to the positions of 5b, 35c and 35d.

When the measurement of the heated aggregate in the measuring tank 30 is completed, the desired special materials are dispensed from the special material storage tanks 23a and 23b into the measuring tank 30 and are cumulatively measured, and the cumulatively measured materials are mixed. Put in 31. Also,
Stone powder and asphalt measured in the stone powder measuring tank 28 and the asphalt measuring tank 29 are also sequentially charged into the mixer 31,
The desired special mixture is manufactured by mixing and adjusting for a predetermined time in the mixer 31.

Also, when the aggregate is discharged from the special-purpose storage bottle 12 side, the same operation as above is performed. Thus, the general-purpose storage bin 11 or the special-purpose storage bin 12
It is convenient to be dispensed from either of them, and it is advisable to store aggregates having different particle size configurations or aggregates having different temperatures in the special-purpose storage bin 12.

FIG. 5 shows another embodiment, which is the discharge gates 34a, 34b, 34 shown in FIGS.
Storage bottle for general use 1 without c and 34d
1 or the heated aggregate in the special-purpose storage bin 12 cannot be discharged to the special mixture manufacturing apparatus 22 side at the same time, but it can be sufficiently used in consideration of the frequency of manufacturing the special mixture.

It should be noted that the present invention is not limited to the above-mentioned specific embodiment, and the discharge gates 34a, 34b, 3 shown in FIGS. 3 and 4 are also used in the plants of FIGS. 1 and 2.
4c, 34d, and level meters 35a, 35b, 35c,
35d may be provided, or when the guide chute 13 for flowing the heated aggregate to the special mixture manufacturing apparatus 22 side cannot be secured at the inclination angle at which the heated aggregate flows due to the height of the plant, a small-capacity storage bin. May be separately installed, temporarily stored, and transferred to the special mixture manufacturing apparatus 22 side by a transfer device such as a conveyor, or the mixer of the special mixture manufacturing apparatus 22 may be measured by the plant main body 7 side and transferred. Three
It is needless to say that various modifications can be made within the scope not departing from the gist of the present invention, such as directly inputting into No. 1.

[0042]

As described above, according to the asphalt plant according to claim 1 of the present invention, the special material storage tank 23a for storing the special material is provided at the side of the plant body 7 of the asphalt plant for producing the asphalt mixture. 23b
..., a special mixture manufacturing apparatus 22 for manufacturing a special asphalt mixture including a weighing tank 30 and a mixer 31 is installed, and the aggregate storage bin 9 of the plant body 7 is installed.
A partition plate 10 is arranged in a direction orthogonal to each partition wall that divides the interior of the aggregate into a plurality of compartments, so that each compartment of the aggregate storage bin 9 is divided into a general-purpose storage bin 11 and a special-purpose storage bin 12.
And a vibrating screen 8 above the partition plate 10.
A distribution damper 16 for distributing and charging aggregates falling from one of the two chambers is provided, and heating aggregates are discharged from the respective compartments to the lower part of the side surface of the special-purpose storage bin 12 for the plant body. 7 is provided with a guide chute 13 which is installed on the side of the special mixture manufacturing apparatus 22 and the tip of the guide chute 13 is exposed to the weighing tank 30 of the special mixture manufacturing apparatus 22. 1
Since the heated aggregate stored in 2 is supplied to the special mixture manufacturing apparatus 22 side so that the special asphalt mixture can be manufactured, it becomes a convenient plant that can ship both ordinary mixtures and special mixtures. Further, since the heated aggregate in the aggregate storage bin 9 of the plant body 7 is supplied to the special mixture manufacturing apparatus 22 side so that the aggregate storage bin 9 is shared, the equipment cost can be saved.

Further, according to the asphalt plant according to the second aspect of the present invention, in addition to the above, the compartments 11a, 1 for the general purpose storage bin 11 of the aggregate storage bin 9 are provided.
A discharge gate 32 for extracting the heated aggregate from 1b, 11c, 11d and supplying it to the special mixture manufacturing apparatus 22 side.
Since the a, 32b, 32c, 32d and the guide chute 13 are arranged, the special mixture can be produced by either the heating aggregate stored in the general-purpose storage bin 11 or the special-purpose storage bin 12, and the production of the special mixture. The variety can be further expanded.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is a schematic diagram showing a partially cutaway view of another embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a main part of FIG.

FIG. 5 is a partially cutaway schematic configuration diagram showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Dryer 7 ... Plant main body 8 ... Oscillating sieve 9 ... Aggregate storage bin 10 ... Partition plate 11 ... General purpose storage bin 12 ... Special purpose storage bin 11a, 11b, 1
1c, 11d ... Compartments 12a, 12b, 12c, 12d ... Compartments 13 ... Guide chute (aggregate supply means for special purpose) 16 ... Sorting damper 22 ... Special mixture manufacturing apparatus 23a, 23b ... Special material storage tank 30 ... Measurement Tank 31 ... Mixers 32a, 32b, 32c, 32d ... Ejection gate (aggregate extracting and supplying means) 34a, 34b, 34c, 34d ... Ejection gates 35a, 35b, 35c, 35d ... Level meter

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-265303 (JP, A) Fukui 4-117006 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E01C 19/02-19/10

Claims (2)

(57) [Claims] 1. An aggregate heated by a dryer is sieved by a vibrating sieve and stored in an aggregate storage bin according to particle size, and a predetermined amount of heated aggregate is discharged from the aggregate storage bin to a mixer and mixed with asphalt or the like. A special asphalt mixture is manufactured by installing a special material storage tank, a measuring tank, and a mixer on the side of the plant body of an asphalt plant that manufactures a special asphalt mixture. Inside the aggregate storage bin of the plant body with the special mixture manufacturing equipment installed
A partition plate is arranged in a direction orthogonal to each partition wall that divides the partition into a plurality of compartments, and each compartment of the aggregate storage bin is divided into a general-purpose storage bin and a special-purpose storage bin. It is divided into chambers, and the partition plate is provided with a sorting means for sorting and dropping the aggregate falling from the vibrating sieve into one of the two chambers, and further below the side surface of the special-purpose storage bin. The heated aggregate was discharged from each compartment of the
Guide shoe installed in the special mixture manufacturing equipment
It disposed the door, producing special mixture tip of the chute guiding
An asphalt plant characterized by facing the measuring tank of the equipment . 2. An aggregate extracting / supplying means for extracting the heated aggregate from each compartment of the general-purpose storage bin of the aggregate storage bin and supplying it to the special mixture manufacturing apparatus side. The asphalt plant according to 1.