JPH09187667A - Crusher in concrete waste material recycle plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crusher by which crushed pebbles of off-spec size which have not been crushed to on-spec size are returned to an auxiliary crusher and crushed again to crush them to on-spec size. SOLUTION: There are provided a hopper 3 having outlets 1, 2 on the front and the rear sides, a feeding chute 4 for dropping a concrete waste material into a half place on the rear side of the hopper, a main crusher 5 for crushing a material to be crushed delivered to below the outlet 2 on the rear side to on-specified specification size, an auxiliary crusher 6 for crushing a material to be crushed delivered to below the outlet 1 on the front side of the hopper to size smaller than the crushed size by the main crusher 5, a feeding conveyor 7 for conveying the crushed material delivered to below the main and auxiliary crushers 5, 6 onto a screening plate for sorting it into crushed pebbles of on-spec size and crushed pebbles of off-spec size, and a returning conveyor 8 for returning and drooping the crushed pebbles of off-spec size excluded by the sorting to the half place on the front side of the hopper.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a crushed stone within a standard size which can be reused by crushing a concrete waste material obtained by dismantling a reinforced concrete structure or the like into pebbles or boulders smaller than a predetermined size. For the crusher to be used by incorporating it into the concrete waste material recycling plant to obtain the details, refer to the standard size by returning the crushed stone outside the standard size that could not be crushed to the size within the standard size to the sub crusher and crushing again. The present invention relates to a crusher in a concrete waste material recycling plant, which ensures that the outer crushed stone is crushed within the standard size by returning it once.

[0002]

2. Description of the Related Art Previously, the inventor of the present invention registered the utility model No. 30
As shown in Japanese Patent No. 18340, a standard size crushed stone (hereinafter,
It is called a bad stone. ) Is returned to the crusher (corresponding to the main crusher in the present invention) and recrushed to provide a concrete waste material recycling plant.

[0003]

According to the plant described in the above-mentioned prior art, if the defective stone has an elliptic spherical shape or a flat shape, it passes through the crusher without being recrushed by the crusher. There are relatively many cases where it repeats as a bad stone repeatedly, and while repeating repeatedly returning, it clogs into the predetermined size hole for screening of the sieve plate and loses the sorting function of the hole However, there are problems such as causing them to pass through, or passing through a predetermined size hole for sorting with the shape and size that are likely to be excluded as defective products during product inspection in the course of returning over and over again.

An object of the present invention is to provide a crusher for a novel concrete waste material recycling plant which is extremely effective for use in solving the above problems.

[0005]

In order to achieve the above object, the crusher according to the present invention is a crusher for crushing concrete waste material obtained by dismantling a reinforced concrete structure or the like into pebbles or boulders smaller than a predetermined size. A crusher that is used by being incorporated in a concrete waste material recycling plant to obtain crushed stones within the standard size that can be reused and that has a front and rear outlets 1 and 2, and a rear side of the hopper 3. The supply chute 4 for dropping the concrete waste material into the half place and the crushed material received through the rear outlet 2 arranged below the rear outlet 2 of the hopper 3 are made into a predetermined standard size. Main crusher for crushing 5
And a sub crusher 6 for crushing an object to be crushed received through the front outlet 1 arranged below the front outlet 1 of the hopper 3 into a size smaller than the crushing size of the main crusher 5, and a main / sub crusher. For feeding to convey on the sifter plate that sorts the crushed materials by the main and auxiliary crushers 5, 6 arranged on the lower side of 5, 6 into crushed stones within the standard size and crushed stones outside the standard size Conveyor 7 and returning conveyor 8 for dropping standard size crushed stones excluded by sorting with a sieve plate back into the front half of hopper 3.
And with.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, a hopper 3 having front and rear outlets 1 and 2 is constructed, and the upper edge of the rear wall of the hopper 3 receives concrete waste material from the previous step and puts it into the hopper 3. A supply chute 4 for dropping into the rear half part is provided, and a partition member 10 in the hopper 3 between the front outlet 1 and the rear outlet 2 is provided so as not to easily deform with a triangular cross section. Below the rear outlet 2, a main crusher 5 for crushing the object to be crushed received through the rear outlet 2 to a predetermined standard size is also received below the front outlet 1 through the front outlet 1. A sub crusher 6 for crushing the crushed object to a size smaller than the crushing size by the main crusher 5 is provided, and the main and sub crushers 5, 6 are crushed by the main and sub crushers 5, 6 below. Standard size A conveyor 7 is provided for transporting the crushed stones onto a sieve plate (not shown) for sorting the crushed stones into nonstandard size crushed stones, and the nonstandard size crushed stones excluded by the screening with the sieve plate are provided in a hopper. A return conveyor 8 that returns to the front half of No. 3 is installed on the hopper 3.

The main and sub crushers 5 and 6 are jaw type crushers, and are movable side jaws 13 and 14 and fixed side jaws 15 and 1 operated by motors 11 and 12.
6.

In the above embodiment, the main crusher 5 was operated with the crush size of 40 mm and the sub crusher 6 was operated with the crush size of 38 mm, and the crushed material obtained by this operation was sieved with a 40 mm diameter predetermined size hole for selection. Although the plate is selected, the size of the crushed size and the size of the size hole are not limited to the above size in the present invention, and other sizes can be used. In this case, the crushing size difference between the primary and secondary crushers 5 and 1 is 1.
It is desirable to be 10 mm.

[0009]

The concrete waste material supplied from the supply chute 4 is crushed by the main crusher 5, and the crushed crushed material is conveyed by the feed conveyor 7 onto the sieving plate and crushed stones within the standard size and defective stones are crushed. The crushed stones within the standard size obtained by this sorting are collected as a product, and the defective stones excluded by the sieving plate are returned by the returning conveyor 8 and crushed again by the sub crusher 6 and then sent. It is conveyed onto the sieve plate by the conveyor 7 and is re-sorted. Almost all of the crushed material to be re-sorted is crushed to a size slightly smaller than the standard size by the crusher 6, and therefore passes through the predetermined size-selecting hole of the sieve plate. Most of the undesired defective stones during this re-passage were accidentally crushed into a flat and large area when crushed for the first time, and are not crushed again by the secondary crusher 6. Re-sorting was carried out as it is, and the above-mentioned re-crushing step and re-sorting step were further performed, and at the time of this third sorting, all passed and there was no defective stone. The inventor was satisfied that he could confirm this passage through the follow-up experiment.

When a situation in which the main crusher 5 is filled with the concrete waste material supplied from the supply chute 4, the concrete waste material is stored in the sub crusher 6 as indicated by an arrow 18 in FIG. It is distributed and crushed.

Even if part of the concrete waste material supplied from the supply chute 4 enters the sub crusher 6 directly due to excessive force, it is crushed by the sub crusher 6.

[0012]

INDUSTRIAL APPLICABILITY The crusher according to the present invention is capable of crushing a concrete waste material obtained by disassembling a reinforced concrete structure or the like as described above into pebbles or boulders smaller than a predetermined size for reuse. A crusher that is used by incorporating it into a concrete waste material recycling plant to obtain crushed stones within the standard size.
A hopper 3 having rear side outlets 1 and 2, a supply chute 4 for dropping concrete waste material into a rear half portion of the hopper 3, and a rear side provided below the rear side outlet 2 of the hopper 3. The main crusher 5 for crushing the object to be crushed received through the side outlet 2 to a predetermined standard size, and the object to be crushed received through the front outlet 1 arranged below the front outlet 1 of the hopper 3. The auxiliary crusher 6 for crushing to a size smaller than the crushing size by the main crusher 5 and the crushed products by the main and auxiliary crushers 5, 6 arranged below the main and auxiliary crushers 5, 6 are crushed within the standard size. A conveyor 7 for conveying onto a sieve plate for sorting stones and non-standard size crushed stones, and the standard size non-crushed stones excluded by the screening by the sieve plate are returned to the front half of the hopper 3. Return controller A) is provided, that is, the action of the auxiliary crusher 6 can quickly eliminate the generation of defective stones, and in order to sufficiently eliminate the above-mentioned problems. It is valid.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3

[Explanation of symbols]

 1 Front Exit 2 Rear Exit 3 Hopper 4 Supply Chute 5 Main Crusher 6 Sub Crusher 7 Feeding Conveyor 8 Returning Conveyor 10 Partition Member 11, 12 Motor 13, 14 Movable Jaw 15, 16 Fixed Jaw 18 Arrow

Claims (1)

[Claims] 1. A concrete waste for crushing a concrete waste material obtained by dismantling a reinforced concrete structure or the like into pebbles or boulders smaller than a predetermined size to obtain a reusable crushed stone within a standard size. A crusher for use in a material recycling plant, which has front and rear outlets 1 and 2, and a hopper 3
A supply chute 4 for dropping concrete waste material in the rear half of the rear side and a crushed material received through the rear side outlet 2 arranged below the rear side outlet 2 of the hopper 3 are provided in a predetermined manner. A main crusher 5 for crushing to a standard size and an object to be crushed received through the front side outlet 1 arranged below the front side outlet 1 of the hopper 3 to a size smaller than the crushing size by the main crusher 5 described above. A crusher 6 and a sieve plate installed below the main and sub crushers 5, 6 for classifying crushed materials by the main and sub crushers 5, 6 into crushed stones within standard size and crushed stones outside standard size. It is characterized in that it is provided with a feeding conveyer 7 for conveying it upward, and a returning conveyer 8 for returning the standard size crushed stones excluded by the screening by the sieve plate into the front half of the hopper 3. Conc Crusher in over door waste material recycling plant.