JPH07565U - Vibrating screen - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vibrating sieve having an improved sieving efficiency, which is provided with a dispersing device capable of uniformly dispersing a raw material in the width direction of the vibrating sieve. [Structure] A vertical weir 6 is provided just below the dropping position of the sieving raw material.
A dispersing device 60 including a flat plate 60B on which 1, 62, 63, 64 are arranged and a casing 60A surrounding the flat plate 60B is fixed to the upstream end of the vibrating screen 70 or a horizontal rotary shaft 65.
It is configured to be tiltable around.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibrating screen equipped with a dispersing device that allows for uniform distribution of the raw material in the horizontal direction, and is particularly suitable for a large-capacity vibrating screen having a large horizontal width compared to the material dropping area.

[0002]

[Prior 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 the first crushing plant, stored in the raw material hopper 10, and then shaken. It is cut out with a feeder 20 and crushed with a rotary crusher 40 for crushed sand, and for example, it is sieved with a vibrating screen 70 having a sieve mesh of 5 mm in the upper stage and 2.5 mm in the lower stage to obtain crushed sand of 2.5 mm or less, Used a closed circuit system that returned to the rotary crusher 40 again.

[0003]

[Problems to be solved by the device]

 For supplying raw materials to the vibrating screen in such a crushed sand manufacturing facility, as shown in FIG. 6, for example, the crushed product of the crusher is transferred to the vibrating screen 70 by the belt conveyor 50, etc. It was made to fall freely from the head pulley and supplied to the vibrating screen 70 via the head sweat 50a. However, in such a supply method, for example, as shown in FIG. 7, the raw material is concentrated in the center of the vibrating screen 70 in the widthwise direction, so that a non-sieving zone occurs on the upstream side of the vibrating screen and the screening is performed. Not only does the efficiency decrease, but in the case of the belt conveyor feed from the direction A in Fig. 7, the left and right distribution is good with the comparative center as the boundary, whereas in the belt conveyor feed from the direction B, the raw material is in the width direction. There was a problem that the sieving efficiency was deteriorated because it tended to be unevenly distributed on the upper side of the paper rather than being even on the left and right.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the vibrating screen of the present invention, the vibrating screen is placed on a flat plate having a substantially horizontal plane extending from just below the pouring position to the upstream end of the screen of the vibrating screen. A vibrating screen equipped with a feed material dispersing device which extends to the upstream end of the screen and has a plurality of vertical weirs arranged at the edge positions to divide the lateral width of the vibrating screen into a plurality of equal parts. The disperser is fixed to the upstream end of the vibrating screen or is provided with a tilting means that is tiltable about a horizontal axis orthogonal to the raw material flow direction.

[0005]

[Action]

 In the present invention, the raw material supplied to the vibrating sieve is dropped into a dispersing device, guided to a plurality of weirs arranged on a flat plate of the dispersing apparatus, and dispersed in the lateral direction of the vibrating sieve. It is dropped on the sieve screen of and is sieved. Therefore, the screening efficiency is increased and the productivity is improved. If the amount of raw material input and the particle size composition of raw material change and the falling area and position of the raw material on the disperser change and the lateral distribution becomes uneven, activate the tilting means of the disperser. Finely adjust the inclination angle of the dispersion device to correct the distribution.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 4 relate to an embodiment of the present invention. FIG. 1 is a perspective view of a vibrating screen, FIG. 2 is a plan view of the vibrating screen, FIG. 3 is a side sectional view of a dispersing device, and FIG. It is a top view explaining a raw material flow. In the figure, a dispersing device 60 is arranged at the upstream end of the raw material flow of the vibrating screen 70. The disperser 60 is provided with a bottom plate 60B made of a substantially horizontal flat plate inside a planar U-shaped casing 60A, and a virtual raw material falling circle 60a at the position where the raw material falls and a horizontal width of the sieve net 70a of the vibrating sieve 70. A pair of weirs 61 consisting of a vertical flat plate is arranged on the left and right on a line connecting the edge. Similar weirs 62, 62, 63, 63 and weirs 64 are arranged downstream of the pair of left and right weirs 61, and the downstream ends of these weirs 61, 62, 63, 64 are vibrating screens 70. The horizontal width of each is set to a position where it is divided into multiple equal parts (in the case of FIG. 2, it is divided into six equal parts), the upstream end is within the raw material drop circle 60a, and each is divided by weirs 61-64. It is set at a position where the raw materials that fall into each zone are distributed in approximately equal parts. In this way, after setting the positions of each of the weirs 61 to 64, the weirs 61 to 64 are fixed to the bottom plate 60B, and the U-shaped casing 60A and the left and right weirs 61, 61 are connected by the slope plate 60D to form the dispersion device. The slope plate 60C is also provided on the upstream side. Although the dispersing device 60 composed of the bottom plate 60B and the casing 60A which are integrated as described above may be fixed to the upstream end of the vibrating screen 70, the distribution of the raw materials in the lateral direction of the vibrating screen is not uniform. In some cases, it is desirable that the dispersion device 60 can be tilted to correct this. That is, as shown in FIG. 3, a horizontal rotating shaft 65 is provided on the lower surface of the downstream end of the bottom plate 60B to be supported by a bearing 65a, and the dispersing device 60 is rotated around the rotating shaft 65 by operating a hydraulic cylinder 66. I tried to tilt only at an angle.

The operation of the vibrating screen 70 including the dispersing device 60 configured as above will be described. The raw material conveyed by a transportation means such as a belt conveyor falls through the chute to the raw material dropping circle 60a of the dispersion device 60. The vibrating screen 70 and the disperser 60 integrated into one unit are inclined to the downstream side together with the vibrating screen 70 and are given a vibration having a small amplitude of high frequency, and the raw materials dropped on the bottom plate 60B are caused by the weirs 61 to 64. It is guided to each of the divided zones, travels in the directions of the arrows shown in FIG. 4, is evenly distributed in the lateral direction of the vibrating screen 70, and drops onto the screen 70a of the vibrating screen 70. Screened. When the raw material is not even in the width direction, for example, when the end in the width direction has a larger distribution than the center, the hydraulic cylinder 66 is operated to increase the inclination of the casing 60A so that the casing 60A flows more in the center than in the end. On the contrary, when the central portion is larger than the end portions, the piston rod 66a of the hydraulic cylinder 66 is retracted to reduce the inclination angle. Further, even if the uniform distribution in the lateral width direction is destroyed during operation for some reason, the inclination of the casing 60A can be changed and corrected by the above operation.

[0008]

[Effect of device]

 As described above, the vibrating screen of the present invention is equipped with a dispersing device that evenly disperses the raw material in the width direction of the vibrating screen, so that it is possible to uniformly distribute and feed the vibrating screen, and to prevent the impact from falling onto the vibrating screen. Alleviates the damage and protects the equipment, and the screening efficiency of the vibrating screen is significantly improved. Therefore, the productivity of the plant using the vibrating screen can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a vibrating screen according to an embodiment of the present invention.

FIG. 2 is a plan view of a vibrating screen according to an embodiment of the present invention.

FIG. 3 is a side sectional view of a dispersion device according to an embodiment of the present invention.

FIG. 4 is a plan view illustrating a raw material flow in a dispersion device according to an embodiment of the present invention.

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

FIG. 6 is an explanatory diagram showing a raw material supply state to a conventional vibrating screen.

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

[Explanation of symbols]

 1 Sand Crushing Equipment 10 Raw Material Hopper 20 Vibration Feeder 30 Belt Conveyor 40 Belt Crusher 50 Belt Conveyor 50a Head Chute 60 Disperser 60A Casing 60a Raw Material Falling Circle 60B Bottom Plate 60C Slope Plate 60D Slope Plate 61 Weir 62 Weir 63 65 Weir 64 Rotating shaft 65a Bearing 66 Hydraulic cylinder 66a Piston rod 70 Vibrating screen 70a Screen

Claims (1)

[Scope of utility model registration request] 1. A flat plate having a substantially horizontal plane extending from just below the dropping position of the sieving raw material to the upstream end of the screen of the vibrating screen, and extending from the dropping position to the upstream end of the screen, and The edge position is a vibrating screen equipped with a device for dispersing a feedstock in which a plurality of vertical weirs are arranged to divide the lateral width of the vibrating screen into equal parts, and the dispersing device is the upstream end of the vibrating screen. A vibrating screen provided with a tilting means that is fixed to a portion or is tiltably arranged around a horizontal axis orthogonal to the raw material flow direction.