JPH04265303A - Aggregate sieving storage device for asphalt plant - Google Patents

Abstract

PURPOSE:To manufacture a special asphalt-based material also while producing a standard asphalt-based material in an asphalt plant. CONSTITUTION:A parting plate 7 is installed into an aggregate storage bin 6 in the parallel direction to the aggregate flow of a vibrating screen 2, the aggregate storage bin 6 is divided into two chambers, and a partition chamber A and a partition chamber B are formed. An aggregate passed through the vibrating screen 2 is distributed and charged to the partition chamber a side and the partition chamber B side by a distributing gate 9, thus separately storing an aggregate for a standard material and an aggregate for a special material. The aggregate is driven away from the partition chamber A side when the standard material is manufactured, and the aggregate is driven away from the partion chamber B when the special material is produced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieving and storage device for an asphalt plant that sieves and stores heat-dried aggregate according to particle size.

0002

2. Description of the Related Art In conventional asphalt plants, aggregates heated and dried in a dryer are sieved by a vibrating sieve, and temporarily stored according to particle size in an aggregate storage bin having a compartment provided below the vibrating sieve. Then, the desired aggregate is discharged according to the formulation of the asphalt mixture to be manufactured, cumulatively weighed by a lower weighing hopper, and fed into a mixer, molten asphalt, stone powder, etc. are added, and mixed and adjusted to produce an asphalt mixture. are doing.

0003

[Problem to be solved by the invention] In conventional aggregate storage bins, when standard asphalt mixes such as dense-grained asphalt mixes and fine-grained asphalt mixes are shipped one after another, the mix of aggregates differs. However, if you use aggregates that are at a different temperature or have a different particle size than those stored in the aggregate storage bin, such as modified asphalt mix or room-temperature mix, there is no problem with shipping. If there is a request for shipment of a special asphalt mix that must be used, it is necessary to remove the aggregate remaining in the aggregate storage bin before manufacturing, which is very time-consuming, and if the aggregate storage bin is If a large amount of aggregate remained in the steel, it was practically impossible to extract it and manufacture a special composite material. Therefore, the larger the plant, the more difficult it becomes to manufacture a special asphalt mixture. However, in the future, it is expected that there will be a strong demand for large-scale plants capable of producing a wide variety of products in small quantities, including special composite materials.

[0004] In view of the above points, an object of the present invention is to provide an aggregate sieving and storage device for an asphalt plant that makes it possible to produce not only a standard asphalt mix but also a special asphalt mix. It is something.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a vibrating sieve that sieves aggregate heated and dried by a dryer according to particle size, and stores aggregate sieved by the vibrating sieve according to particle size. In an aggregate sieving storage device for an asphalt plant comprising an aggregate storage bin having compartments, a partition plate is provided inside the aggregate storage bin in a direction parallel to the aggregate flow of the vibrating sieve to divide the aggregate storage bin into two. divided into rooms,
A sorting means is provided above the partition plate for sorting and charging the aggregate falling from the vibrating sieve into either of the two chambers.

[0006]

[Operation] In the aggregate sieving and storage device according to the present invention, the aggregate that falls after being sieved by the vibrating sieve according to particle size is sorted by the sorting means at the top of the aggregate storage bin, and is used for manufacturing standard asphalt mixture. By storing the aggregates to be used in one side of the two-chambered aggregate storage bin, and storing the aggregates used for manufacturing special composite materials in the other side of the two-chambered aggregate storage bin, While producing standard asphalt mixes, we can also produce special asphalt mixes.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a mixing tower of an asphalt plant, and a vibrating screen 2 is mounted on the top of the mixing tower. Heated aggregate heated and dried by a dryer (not shown) is charged into the vibrating sieve 2 from an input chute 3, and the aggregate is sieved according to particle size by vibrations generated by a vibrator 4. Several stages of sieve screens are arranged inside the vibrating sieve 2. For example, the top stage facing the input chute 3 has a mesh size of 25.
A sieve screen 5a with mm square holes (or round holes), a sieve screen 5b with a 15 mm mesh size on the lower tier, a sieve screen 5c with a 6 mm mesh size on the lower tier, and a sieve screen 5d with a 3 mm mesh size on the bottom tier. It is placed.

[0009] An aggregate storage bin 6 is disposed below the vibrating sieve 2, and the aggregate storage bin 6 includes a sand bin 6a, crushed stone, etc. so that the aggregate sieved by the vibrating sieve 2 can be stored according to particle size. Sections such as bins 6b, 6c, and 6d are provided. Further, inside each of the compartments 6a, 6b, 6c, and 6d of the aggregate storage bin 6, a partition plate 7 is provided in a direction parallel to the aggregate flow of the vibrating sieve 2, dividing the compartment into two compartments. Compartment A has a high aggregate storage capacity, while compartment B on the other side has a low aggregate storage capacity.

An inclined chute 8 is provided at the top of the aggregate storage bin 6 for collecting the aggregate falling from the vibrating sieve 2 above the partition plate 7. In between, the falling aggregate is placed on the compartment A side or compartment B.
A sorting gate 9 is provided for sorting to the side. The sorting gate 9 has a substantially fan-shaped cross section, and the shaft body 10 attached to the key part of the fan-shaped part is attached to the aggregate storage bin 6 with the arc part of the fan-shaped part in contact with the lower end part of the inclined chute 8. The aggregate is attached to the side wall of the chamber by a bearing, and by rotating the distribution gate 9 about the shaft 10, the aggregate is distributed to the compartment A side or the compartment B side.

Discharge gates 11 are provided at the lower ends of the compartments A and B of the aggregate storage bin 6, respectively, for discharging the aggregates.
a, 11b, 11c, and 11d are provided. Further, a weighing hopper 12 is provided below the aggregate storage bin 6, and further below the weighing hopper 12, a mixer 13 for mixing materials is provided.

Next, the proper use of compartment A and compartment B of the aggregate storage bin 6 will be explained.

[0013] When producing standard asphalt mixtures such as dense-grained asphalt mixtures and fine-grained asphalt mixtures, first, the distribution gate 9 is rotated to the compartment B side, and the compartment B side is closed. , leave compartment A side open. Then, the aggregate heated and dried by the dryer of the asphalt plant is lifted to the upper part of the mixing tower 1 and introduced into the vibrating sieve 2 from the input chute 3, and the aggregate is sieved one after another by the sieve screens 5a to 5d and allowed to fall. The particles are collected in the center by an inclined chute 8 and charged into the compartment A side, and stored in compartments 6a, 6b, 6c, and 6d on the compartment A side according to particle size. Then, depending on the composition of the asphalt mixture to be manufactured, compartment A
A predetermined amount of desired aggregate is discharged from each of the side compartments 6a, 6b, 6c, and 6d into a weighing hopper 12, cumulatively weighed, and this aggregate is fed into a mixer 13, and molten asphalt or the like is added thereto for mixing adjustment. It is. In this way, when shipping only standard asphalt mix, only the compartment A side with a large storage capacity is used, and the compartment B side with a small storage capacity is left empty for shipping special mix materials. put.

[0014] Also, each section 6a, 6b, 6c, 6 of the aggregate storage bin 6, such as modified asphalt mixture, room temperature mixture, etc.
When manufacturing a special mixture that requires the use of aggregates that are at a different temperature or have a different particle size than the aggregate stored in the compartment A, the distribution gate 9 is rotated to the compartment A side, and the The chamber A side is closed and the compartment B side is opened. Then, in the same manner as described above, the aggregates are fed into the vibrating sieve 2, and the aggregates are sieved one after another by the sieve screens 5a to 5d and dropped, collected in the center by the inclined chute 8, and fed into the compartment B side. , stored in each compartment 6a, 6b, 6c, 6d on the compartment B side according to particle size. Then, each compartment 6a, 6b, 6c on the compartment B side depending on the formulation of the special asphalt mixture to be manufactured.
, 6d is discharged to produce asphalt mixture. Once the production of the special asphalt mixture is completed, the aggregate remaining in each compartment 6a, 6b, 6c, and 6d on the compartment B side is paid out little by little during the next standard asphalt composite production, and the aggregate is transferred to the compartment B side. It is emptied and prepared for the next production of special asphalt mixture.

As mentioned above, by using the compartment A side as a storage bin for manufacturing standard asphalt mixture and the compartment B side as a storage bin for manufacturing special asphalt mixture, it is possible to store both standard and special asphalt mixtures. It can also be used for manufacturing, making it possible to produce a wide variety of asphalt mixtures.

Next, another example of how to use compartment A and compartment B of the aggregate storage bin 6 will be explained. FIG. 3 shows another embodiment in which compartment A and compartment B of the aggregate storage bin 6 are partitioned so that their aggregate storage capacities are approximately equal.
In FIG. 3, the same reference numerals as in FIG. 2 indicate the same components, and their explanations will be omitted.

[0017] In this way, the aggregate storage capacity is partitioned to be approximately equal, and both compartment A side and compartment B side are used when producing standard asphalt mix. First, aggregate for producing standard asphalt mixture is stored in both the compartment A side and the compartment B side of the aggregate storage bin 6. When discharging aggregate, first discharge it from compartment A,
Level type 1 for empty detection when the amount of aggregate in compartment A decreases
If 4 makes an empty call, dispensing from compartment A is stopped, and dispensing from compartment B is started this time. While discharging from compartment B, aggregate is put into compartment A and stored. In this manner, both compartments A and B are used alternately when manufacturing standard asphalt mix. Then, when there is a request to ship special asphalt mixture,
For example, the aggregate on the compartment B side is preferentially used to empty the compartment B. Then, the aggregate for the special composite material is put into the compartment B side and stored, and the aggregate is discharged from the compartment B side to produce the special composite material. Once the production of the special composite material is completed, the aggregate from the compartment B side is mixed little by little into the aggregate discharged from the compartment A side during standard composite material production, and used up, and then used in the same way as above. It is. By using the bin in this manner, the entire space of the aggregate storage bin can be used effectively without leaving one of the compartments A and B idle.

[0018]

Effects of the Invention In the aggregate sieving storage device for an asphalt plant according to the present invention, a partition plate 7 is provided inside the aggregate storage bin 6 in a direction parallel to the aggregate flow of the vibrating sieve 2.
The aggregate storage bin 6 is divided into two chambers to form a compartment A and a compartment B, and the aggregate that has passed through the vibrating sieve 2 is distributed to the compartment A side or the compartment B side and thrown in to form a standard composite. By making it possible to store aggregate for wood and special mix separately, it is possible to manufacture standard asphalt mix as well as special asphalt mix.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing an embodiment of an aggregate sieving and storage device according to the present invention.

FIG. 2 is a partially cutaway side view of FIG. 1;

FIG. 3 is a schematic front view showing another embodiment of the aggregate sieving and storage device.

[Explanation of sign]

1 Mixing tower 2 Vibrating sieve 6 Aggregate storage bin 7 Partition plate 8 Inclined chute 9 Sorting gate A. Compartment room B. Compartment room

Claims (1)

[Claims] Claim 1: Aggregate for an asphalt plant, comprising a vibrating sieve that sieves the aggregate heated and dried by a dryer according to particle size, and an aggregate storage bin having a compartment for storing the aggregate sieved by the vibrating sieve according to particle size. In the sieving storage device, a partition plate is provided inside the aggregate storage bin in a direction parallel to the aggregate flow of the vibrating sieve to divide the aggregate storage bin into two chambers;
An aggregate sieving and storage device for an asphalt plant, characterized in that a distributing means is provided above the partition plate for distributing the aggregate falling from the vibrating sieve into one of two chambers.