JPH0681675U - Vibrating screen - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a vibrating screen having an improved sieving efficiency, which is provided with a dispersing device capable of uniformly dispersing the raw material in the lateral direction of the vibrating screen. [Structure] A flat plate 61, a slope plate 62, side slope plates 63 and 64, and a casing 60A are provided immediately below a dropping position of a sieving raw material.
The dispersion device 60 is composed of a vibrating screen 70 fixed to the upstream end of the vibrating screen 70 or tiltable about a horizontal axis.

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 raw materials in the lateral direction, and is particularly suitable for large-capacity vibrating screens having a large lateral width compared to the area where the raw material is dropped.

[0002]

[Prior art]

 Conventionally, in order to produce crushed sand, as shown in FIG. 5, river gravel, land gravel, and mountain crushed crushed stone are crushed and sieved in the first crushing plant, stored in the raw material hopper 10, and then vibrated. It is cut out with a feeder 20 and crushed with a rotary crusher 40 for crushing sand, and for example, it is sieved with a vibrating sieve 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, and a product on the sieve. 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 sieve in such a crushed sand manufacturing facility, for example, as shown in FIG. 6, the crushed products of the crusher are transferred to the vibrating sieve 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 feeding method (2) as shown in FIG. 7, for example, as shown in FIG. 7, the raw material is concentrated and falls in the center of the vibrating screen 70 in the lateral direction, so that there is a zone that is not screened upstream of the vibrating screen. Not only does this cause a reduction in sieving efficiency, but in the belt conveyor supply from the direction A in Fig. 7, the left and right distribution is good with the comparative center as the boundary, while the belt conveyor supply from the direction B is the raw material. However, there was a problem that the sieving efficiency was further deteriorated because the paper was not evenly distributed in the lateral direction and tended to be unevenly distributed on the upper side of the paper.

[0004]

[Means for Solving the Problems] In order to solve the problems described above, in the vibrating screen of the present invention, a flat plate having a substantially horizontal surface is provided immediately below the dropping position of the sieving raw material, and a downstream side of the flat plate is provided. And a flat plate that tilts and descends in the downstream direction are connected to the flat plate, and a side plate that slopes to both the downstream side and the side face is connected to the evaluation flat plate and both side faces of the flat plate. A vibrating screen having a tilting means fixed to the upstream end face of the vibrating screen or tiltable about a horizontal axis orthogonal to the raw material flow direction. did.

[0005]

[Action]

 In the present invention, the raw material supplied to the vibrating sieve is dropped into the dispersing device and guided to the flat plate, the slant plate or the side slant plate of the dispersing device to disperse in the lateral direction of the vibrating screen, respectively, and then the screen of the vibrating screen. It drops on a net and is screened. Therefore, the screening efficiency is increased and the productivity is improved. If the distribution of material in the width direction becomes uneven due to changes in the amount of material input and the particle size composition of the material and the area and position of the material falling into the disperser, activate the tilting means of the disperser. Finely adjust the angle of inclination of the disperser 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 page (3) of the figure, a dispersing device 60 is arranged at the upstream end of the raw material flow of the vibrating screen 70. In the dispersion device 60, a rectangular horizontal flat plate 61 having an area almost equal to or slightly smaller than the raw material dropping area 60a is arranged in the center of a flat U-shaped casing 60A, and a taper is provided on the downstream side thereof. A slope plate 62 having a trapezoidal shape and inclined downward toward the downstream side is connected. On both sides of the flat plate 61 and the sloping plate 62, side sloping plates 63 and 64 that incline both outward and downstream are connected, and the flat plate 61, the sloping plate 62, the side sloping plate 63 and the side sloping plate 64 that are integrated are the casings. It is fixed to 60A. As shown in FIG. 3, the casing 60A configured as described above is tiltably arranged by the hinge 65 at the upper end of the upstream side of the vibrating screen 70, and is attached to the hydraulic cylinder 66 pin-joined to the vibrating screen 70. Therefore, the inclination can be changed. Instead of the hinge 65, a horizontal rotation shaft may be supported by a bearing.

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 falling area 60a of the dispersion device 60. The dispersing device 60 integrated with the vibrating screen 70 is slightly inclined to the downstream side together with the vibrating screen 70, and is given a vibration having a small amplitude of high frequency, so that the flat plate 61, the slant plate 62 adjacent thereto, and the side slant plate. The raw materials 63 and 64 are respectively moved in the directions of the arrows shown in FIG. 4, and are evenly distributed in the width direction of the vibrating screen 70, and are dropped onto the screen 70a of the vibrating screen 70 to be screened. . When the raw material is not uniform in the lateral width direction, for example, when the end portion in the lateral width direction has a larger distribution than the central portion, the hydraulic cylinder 66 is operated to increase the inclination of the casing 60A and flow more to the central portion than to the end portion. 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 when the uniform distribution in the lateral width direction is broken for some reason during operation, the inclination of the casing 60A can be changed and corrected by the above operation.

[0008]

[Effect of device]

 As described above, since the vibrating screen of the present invention is equipped with the dispersing device that evenly disperses the raw material in the lateral direction of the vibrating screen, it is possible to uniformly supply the vibrating screen to the vibrating screen (4). It protects the equipment by mitigating the impact of falling onto the equipment and significantly improves the screening efficiency of the vibrating screen. 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 implementation side of the present invention.

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

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

FIG. 4 is a plan view illustrating a raw material flow in a dispersion device according to an implementation side 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 Area Page (5) 61 Flat Plate 62 Slope Plate 63 Side Slope Plate 64 Side Slope Plate 65 hinge 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 is arranged immediately below a dropping position of a sieving raw material, and a sloping plate inclined downward in the downstream direction is connected to the flat plate on the downstream side of the flat plate. A vibrating screen provided with a dispersion device for a feed material, in which both side surfaces of a face plate are connected to side slope plates that incline toward both the downstream side and the side surface, and the dispersion device is fixed to the upstream end surface of the vibration screen. Alternatively, a vibrating screen provided with a tilting means that is tiltably arranged around a horizontal axis orthogonal to the raw material flow direction.