JPH09119108A - Asphalt plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt plant in which the storage capacity of a specific sort of aggregate can be increased so as to deal with manufacture of a specific mixture by arranging an outer compartment along the outer wall of compartments. SOLUTION: An aggregate storage bin 6 in which aggregate heated and dried by a dryer is screened out by a vibrating screen 2, and stored in compartments 6a-6e by grain size distinction is provided, and a measuring tank 17, a mixer 18, and the like are arranged on the lower positions than it. In this asphalt plant 1, an outer compartment 8 is arranged along the outer wall of the compartments 6a-6e of the aggregate storage bin 6, and a delivery gate 9 delivering the aggregate is arranged on the lower part. Aggregate inflow ports 10a-10c allowing inflow of aggregate into the outer compartment 8 are provided on the walls of the compartments 6a-6e, and opening/closing covers 11b-11d are arranged on the opening parts. Hereby, at manufacturing a specific mixture using aggregate only in the range of specific grain size, the storage capacity of the specific sort of aggregate can be increased.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an asphalt plant for producing an asphalt mixture which is a road paving material, and more particularly to an asphalt plant for producing a special asphalt mixture such as a drainage asphalt mixture.

[0002]

2. Description of the Related Art Asphalt mixtures produced in asphalt plants are increasingly produced as special ones according to their intended use. For example, water such as rainwater collects on the surface of paved roads on highways. In order not to
Drainage asphalt mixtures are also being produced that allow water to soak into paved roads and at the same time allow the soaked water to drain from the subgrade below.

[0003] Aggregates used in the drainage asphalt mixture include aggregates having a particle size of 5 to 13 mm (80 to 85 mm).
%) And sand (15-20% by weight) are used exclusively. And when manufacturing the drainage asphalt mixture, the crushed stone No. 6 (5-1
Aggregate equivalent to 3 mm particle size) and sand are simultaneously dispensed in a predetermined amount and supplied to the dryer, and the aggregate heated by the dryer is supplied to the vibrating sieve of the plant body, and the aggregate storage bin is screened according to particle size. It is stored in.

[0004]

However, the above-mentioned aggregate storage bin divides the inside of the bin and is usually 2.5 mm or less of sand, 2.5 to 5 mm, 5 to 13 mm, 13 mm to 20 m.
It is divided into 5 chambers to store aggregates of m, 20 mm or more according to particle size, and when producing a drainage asphalt mixture as described above, there are two types of aggregates used: No. 6 crushed stone and sand. 2.5m of aggregate storage bin because it is only
The asphalt mixture will be manufactured and shipped using compartments of m or less and compartments of 5 to 13 mm. In that case,
Since the storage capacity of the compartment of 5 to 13 mm is smaller than that of the compartment of 2.5 mm or less, the delivery of the aggregate of 5 to 13 mm can not be done in time and waits for weighing, or the supply becomes excessive and overflow occurs. There are drawbacks such as.

In view of the above points, the present invention provides an aggregate storage bin structure capable of increasing the storage amount of a specific aggregate when a specific mixture is produced by using only a specific type of aggregate. Also aims to provide a suitable asphalt plant.

[0006]

In order to achieve the above object, the present invention provides a vibrating screen for sieving aggregate dried by heating with a dryer according to particle size, and an aggregate screened by the vibrating sieve in a compartment. In an asphalt plant in which an aggregate storage bin for storing according to particle size and an aggregate measuring tank, a mixer and the like are arranged below the aggregate storage bin, an external compartment along the outer wall of the compartment of the aggregate storage bin Along with
An aggregate discharge gate for discharging aggregate is arranged at a lower portion of the external compartment, and an aggregate inlet port is formed on a wall surface of the compartment to allow an aggregate to flow into the external compartment from the compartment. The aggregate inlet is provided with an opening / closing lid for controlling the opening / closing of the opening.

[0007]

According to the present invention, when an asphalt mixture using a specific type of aggregate such as a drainage asphalt mixture is manufactured, it is placed on a wall surface between a specific compartment and an external compartment. The opening / closing lid for inflowing the aggregate is opened and the aggregate introduced into a specific compartment is allowed to flow into the external compartment through the aggregate inlet. In this way, a specific type of aggregate is also stored in the external compartment to increase the storage amount, prevent aggregate breakage and overflow, and enable stable shipment of special asphalt mixtures.

[0008]

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

Reference numeral 1 is a mixing tower of an asphalt plant, on which a vibrating screen 2 is mounted. Heated aggregate heated and dried by a drier (not shown) is introduced into the vibrating screen 2 from a charging chute 3, and the vibration is generated by the vibrating body 4 to screen the aggregate according to the particle size.

The vibrating screen 2 is provided with several stages of screen screens. For example, at the position facing the uppermost charging chute 3, a screen having square holes (or round holes) with a mesh size of 25 mm is provided. Net 5
a, a sieve mesh 5b having a mesh size of 15 mm, a sieve mesh 5c having a mesh size of 6 mm, and a sieve mesh 5d having a mesh size of 3 mm are arranged in the lower stage, the lower stage, and the lower stage, respectively.

An aggregate storage bin 6 is disposed below the vibrating screen 2. The aggregate storage bin 6 is partitioned appropriately to form compartments 6a, 6b, 6c, 6d and 6e. Vibrating screen 2
Less than 2.5 mm of sand screened by; and 2.
5-5 mm, 5-13 mm, 13-20 mm, 20 mm
The above aggregates are stored in each compartment. The aggregates stored in the compartments 6a, 6b, 6c, 6d, 6e are the aggregate discharge gates 7a, 7 arranged in the lower portion.
The payment is made from b, 7c, 7d, and 7e.

An external compartment 8 is arranged along the outer wall of the compartment 6b to the compartment 6d, and an aggregate discharging gate 9 is arranged below the outer compartment 8 to store the aggregate. I am trying to pay out. And the compartments 6b, 6c,
As shown in FIG. 3, on the wall surface of 6d on which the external compartment 8 is provided, aggregate inlets 10b, 10c for allowing the aggregates stored in the compartments 6b, 6c, 6d to flow into the external compartment 8. ,
10d are respectively drilled, and these aggregate inlets 10
Opening / closing lids 11b, 11c, 11d for opening / closing the openings are attached to b, 10c, 10d from the external compartment 8 side, and the cylinders 12b, 12c, 12d are expanded / contracted to open / close the opening / closing lids 11b, 11c, Each of the chambers 11d is opened and closed, and the capacity of the specific compartment is increased by combining the specific compartment and the external compartment.

Further, FIG. 4 shows another embodiment in which two external compartments are arranged. The outer compartments are divided into compartments 6a to 6b and compartments 6c to 6d. External compartments 13 and 14 are arranged along the outer wall. Aggregate inlets 10a, 10b, 10c, and 10d are formed on the wall surfaces of the compartments 6a, 6b, 6c, and 6d with respect to the external compartments 13 and 14, respectively, as described above. 10a, 10b, 10c, 10
The opening / closing lids 11a and 11 for opening and closing this opening are shown at d.
b, 11c, 11d are attached from the external compartments 13, 14 side, and the cylinders 12a, 12b, 12c, 12d are expanded and contracted to open and close the lids 11a, 11b, 11c,
11d is opened and closed respectively. And, below the external compartments 13 and 14, aggregate discharge gates 15 and 16 for discharging aggregate are arranged.

Reference numeral 17 denotes an aggregate measuring tank disposed below each compartment, which is adapted to sequentially measure the aggregate discharged from each compartment, and the aggregate measuring tank 17 provides the desired aggregate respectively. The desired amount of the asphalt mixture is manufactured by adding the stone powder, asphalt, etc., which have been measured separately, to the mixture and adjusting them while adding the measured amount to the lower mixer 18.

However, when the capacity of a specific compartment is increased by using the external compartment, the opening / closing lid attached to the desired compartment is opened to open the aggregate inlet to the external compartment 8, The aggregate stored in the desired compartment is made to flow into the outer compartment 8 through the aggregate inlet to increase the storage amount of the desired aggregate.

For example, among the compartments, compartments 6a, 6b,
When the asphalt mixture is produced using 6c, 6d and the external compartments 8, if the volume ratio of each compartment is set as follows, the external compartment 8 compartment 6a compartment 6b compartment 6c compartment 6d 10 % 35% 15% 25% 15% By combining the external compartments 8 with respect to the compartments 6b to 6d, it is possible to increase the capacity of the particular compartments. The compartments 6a, 6b, 6c, 6c 6d 35% 25% 25% 15% 35% 15% 35% 15% 35% 15% 25% 25% It is possible to obtain three compartment volume ratios and when producing a standard asphalt mixture Of course, even when producing a special asphalt mixture that uses only two types of aggregates, such as a drainage asphalt mixture, the compartment volume suitable for the formulation The quantity ratio can be set.

When two external compartments are provided as shown in FIG. 4, for example, the volume ratios of the respective compartments are set as follows, and the outer 13 outer 14 outer compartment 6a compartment 6b Compartment 6c Compartment 6d 15% 10% 25% 15% 20% 15% Combining external compartment 13 with compartment 6a and compartment 6b and combining external compartment 14 with compartment 6c and compartment 6d It is possible to increase the capacity of a specific compartment with: compartment 6a compartment 6b compartment 6c compartment 6d 40% 15% 30% 15% 40% 15% 20% 25% 25% 30% 30% 15% Four compartment volume ratios of 25% 30% 20% 25% can be obtained.

The arrangement example of the external compartments shown in this embodiment does not limit the arrangement or number of the external compartments.
In addition to this, various arrangement examples of the external compartments are conceivable, and it goes without saying that the arrangement and the number thereof can be changed without departing from the gist of the present invention.

[0019]

As described above, in the asphalt plant according to the present invention, the external compartments are arranged along the outer walls of the compartments of the aggregate storage bin, and the compartment walls are located outside the compartments. An aggregate inlet port that allows the aggregate to flow into the chamber is opened, and the opening / closing lid provided at the aggregate inlet port is opened, so that the same type aggregate is provided in the specific compartment and the external compartment. Since it can be stored, it is possible to increase the storage amount of the specific aggregate required at the time of producing the special mixture, and it is possible to efficiently produce the special mixture.

[Brief description of the drawings]

FIG. 1 is a partially cutaway schematic front view of an example of an asphalt plant of the present invention.

FIG. 2 is a schematic side view with a part notched in FIG.

FIG. 3 is an enlarged vertical sectional view of a main part of FIG.

FIG. 4 is a schematic front view corresponding to FIG. 1 showing another embodiment.

[Explanation of symbols]

2 ... Vibrating screen 6 ... Aggregate storage bin 6a, 6b, 6c, 6d, 6e ... Compartment chamber 7 ... External compartments 10a, 10b, 10c, 10d ... Aggregate inlet 11a, 11b, 11c, 11d ... Open / close lid 13 , 14 ... External compartment

Claims (1)

[Claims] 1. A vibrating sieve for sieving aggregate dried by heating with a dryer according to grain size, an aggregate storage bin for storing aggregate aggregate sieved by the vibrating sieve for each grain size in a compartment, and an aggregate storage bin for the aggregate storage bin. In an asphalt plant in which an aggregate measuring tank and a mixer and the like are arranged in the lower part, an external compartment is arranged along the outer wall of the compartment of the aggregate storage bin, and the aggregate is placed under the external compartment. While arranging an aggregate discharging gate for discharging, an aggregate inlet port is formed on the wall surface of the compartment to allow the aggregate to flow from the compartment to the external compartment,
An asphalt plant characterized in that an opening / closing lid for controlling opening / closing of the opening is disposed at the aggregate inlet.