JP2823108B2 - Crushed sand production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushed sand production facility for use in mortars and other applications, and more particularly to a crushed sand production facility provided with a dispersing device that takes into consideration the uniform distribution of raw materials to a vibrating sieve.

[0002]

2. Description of the Related Art Conventionally, in order to produce crushed sand, as shown in FIG. 5, river gravel, land gravel, and crushed crushed stone are crushed and sieved in a first crushing plant, and then the raw material hopper 10 is crushed. After being stored in the vibrating feeder 20, the material is cut out by a vibrating feeder 20 and crushed by a rotary crusher 40 for crushed sand.
A closed circuit system was adopted in which the sieved product was sieved with a vibrating sieve 70 having a sieve mesh of 2.5 mm to obtain crushed sand of 2.5 mm or less, and the product on the sieve was returned to the rotary crusher 40 again.

[0003]

In order to supply raw materials to a vibrating sieve in such a crushed sand manufacturing facility, as shown in FIG. 6, for example, crushed products of a crusher are fed to a vibrating sieve 70 by a belt conveyor 50 or the like. The belt is conveyed, dropped freely from the head pulley of the belt conveyor 50, and supplied to the vibrating sieve 70 via the head chute 50a. However, in such a supply method, for example, as shown in FIG. 7, since the raw material falls concentrated at the center in the width direction of the vibrating sieve 70, a zone that is not sieved is generated on the upstream side of the vibrating sieve, and the sieving efficiency is increased. In addition, while the belt conveyor supply from the direction A in FIG. 7 has a good left and right distribution with the center as a boundary, the supply of the belt conveyor from the B direction does not Not evenly
There has been a problem that the sieving efficiency has been deteriorated since the sieving efficiency tends to be unevenly distributed above the paper surface.

[0004]

In order to solve the above-mentioned problems, in the present invention, a raw material hopper for receiving raw materials, a vibrating feeder for cutting out raw materials, a rotary crusher, and a crushed raw material are used. A crushed sand production facility comprising a vibrating sieve for sieving and a dispersing device for uniformly dispersing raw materials in the width direction of the vibrating sieve and supplying the raw material to the vibrating sieve; A vertical weir plate that divides a plurality of casing entrance cut planes in the raw material flow direction is arranged in parallel, and the vibrating sieve is provided at a lower end of each space defined by the inner surface of the casing and each of the weir plates. And a chute that forms a flow path that divides the width direction into a plurality of sections is sequentially attached.

[0005]

In the present invention, the raw material supplied to the vibrating sieve enters the dispersing device, falls through each space defined by the weir plate in the dispersing device, and is moved to the central portion of the vibrating sieve by each chute at the lower end. In addition, since it is distributed to both sides of the vibrating sieve and supplied to the vibrating sieve, it is distributed substantially evenly in the width direction of the vibrating sieve.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 relate to an embodiment of the present invention.
1 is a flow sheet of a crushed sand production facility, FIG. 2 is a perspective view of a dispersing device and a vibrating sieve, FIG. 3 is a plan view of the dispersing device and a vibrating sieve, and FIG. 4 is a front view illustrating the flow of raw materials in the dispersing device.

In the figure, 10 is a raw material hopper, 20 is a vibration feeder, 30 is a belt conveyor, 40 is a rotary crusher, 50 is a belt conveyor for transporting crushed products, 6
Numeral 0 denotes a dispersing device, 70 denotes a vibrating sieve, 80 denotes a belt conveyor for transporting products below the sieve, and 90 denotes a belt conveyor for transporting products above the sieve. As shown in FIGS. 2 to 4, the dispersing device 60 is a vertical dam plate 62 that divides the inside of a box-shaped casing 62 having a rectangular cross section into a plurality of threes (12 in the figure). , 62, arranged to ..., space S _1, S ₂ of the 12 that are equally divided, ..., to arrange the S ₁₂ in the flow direction of the raw material of the vibrating sieve 60. And, for example, every three S ₁ , S
₄ , S ₇ , and S ₁₀ are connected to a chute 60 a that guides the flow A to the left of the vibrating sieve 70, and S ₂ , S ₅ , S ₈ , and S
₁₁ connecting the chute 60c which guides so that the right side of C _{flow, S 3, S 6, S} 9, S 12 is as dropping the material immediately below it without connecting to the chute.

[0008] By configuring as described above, distributed
At random supplied to the inlet opening of the device 60 at random.
The fee is 12 spaces S₁ , S_Two , ..., S₁₂Minutes to any of
To the left of the vibrating sieve 70 in the width direction (A flow
), Center part (flow B), right part (flow C)
They fall on the ground, and their distribution rates are almost equal. Sky
Interval S₁ , S_Two , ... is the maximum size of the raw material to be supplied
It is desirable that the particle size is not more than two to three times the particle size. did
Therefore, width 1800mm x length 4800m as shown
m crushed vibrating sieve 70, feed material maximum particle size 50mm
Space S ₁ , S_Two , ... is 125mm × 6
00 mm, and the inlet size of the dispersion device 60 is approximately 1500
mm × 600 mm.

The dispersing device 60 of the present invention does not need to supply the raw material uniformly distributed over the entire surface of the inlet opening, that is, even if the raw material is locally supplied near the center of the inlet opening. if three or more size of the space S _n which is at least divided into drop area, because raw material supplied to the vibrating screen 70 is allocated spread to the width direction of the vibrating screen, it is substantially equally material distributed . As described above, not only the material flow A direction (coincident with the material flow direction) of FIG.
Even in the direction (substantially perpendicular to the material flow), it can be distributed almost uniformly without dropping to one side in the width direction of the vibrating sieve. Therefore, since the screens 72l and 72s of the vibrating screen can be sieved using the entire surface, the sieving efficiency is improved.

[0010]

As described above, according to the present invention, since the crushed product of the rotary crusher is supplied to the vibrating sieve through the dispersing device, uniform distributed supply in the width direction of the vibrating sieve becomes possible. The impact of falling on the sieve is reduced to protect the equipment, and the sieving efficiency of the vibrating sieve is significantly improved. Therefore, the productivity of crushed sand increases. In addition, it is possible to supply the vibrating sieve from any direction, and the layout selection range is expanded.

[Brief description of the drawings]

FIG. 1 is a flow sheet of a crushed sand production facility according to an embodiment of the present invention.

FIG. 2 is a perspective view of a dispersion device and a vibrating sieve according to an embodiment of the present invention.

FIG. 3 is a plan view of a dispersion device and a vibrating sieve according to an embodiment of the present invention.

FIG. 4 is a front view illustrating a flow of raw materials in the dispersion apparatus according to the embodiment of the present invention.

FIG. 5 is a flow sheet of a conventional crushed sand production facility.

FIG. 6 is an explanatory diagram showing a state of supplying raw materials to a conventional vibrating sieve.

FIG. 7 is an explanatory diagram showing a raw material flow on a conventional vibrating sieve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crushed sand manufacturing equipment 10 Raw material hopper 20 Vibration feeder 30 Belt conveyor 40 Swiveling crusher 50 Belt conveyor 50a Head chute 60 Dispersing device 60A Casing 60a Chute 60c Chute 62 Dam plate 70 Vibrating sieve 70a Stone box 70b Bottom plate 72l Sieve mesh 80 Belt conveyor 90 Belt conveyor

Claims (1)

(57) [Claims] 1. A raw material hopper for receiving raw materials, a vibrating feeder for cutting out raw materials, a rotary crusher, a vibrating sieve for sifting raw materials after crushing, and a uniform distribution of raw materials in a width direction of the vibrating sieve. And a dispersing device for supplying the vibrating sieve to the vibrating sieve, wherein the dispersing device includes a vertical weir plate that divides a plurality of cut planes of the casing entrance in the casing in the flow direction of the raw material of the vibrating sieve. Sand crushing sand which is arranged in parallel and sequentially attached to the lower end of each of the spaces defined by the inner surface of the casing and the weir plate to form a flow path which divides the vibrating sieve into a plurality of portions in the width direction. production equipment.