JPH11319715A - Cylindrical screen rotation type sieving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sieving apparatus which is enabled to take an object substance to be sieved out of a higher position than the loading position, to have a long distance for sieving, and to lower the noise. SOLUTION: This cylindrical screen rotation type sieving apparatus comprises a cylindrical screen 1, rollers 3, 4 supporting the screen 1 slantingly in freely rotatable manner, a driving apparatus 5 for driving and rotating the roller 4, a spiral guide 2 installed in the inside of the screen 1, a throwing hopper 6 installed on a lower part of the screen 1 to supply an object substance to be sieved, and product-taking out parts 10, 11 installed along the screen 1 for taking out sieved products.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sieve for sifting raw materials.

[0002]

2. Description of the Related Art A conventional sieving machine puts an object to be sieved on a flat screen and classifies the screen by applying vibration to the screen. When classifying several particle sizes at the same time, screens having different meshes are stacked, objects to be sieved are put in from above, and objects to be sieved that have passed through the screen are sequentially taken out and sieved.

FIG. 4 shows an example of a conventional sieving machine. It consists of a three-stage sieve having different meshes and a vibrator for elastically supporting the sieves. An object to be sieved is introduced from an inlet at the top, and a product corresponding to the mesh is taken out from an outlet of each sieve. The shaker vibrates each sieve up and down and left and right.

[0004]

In the case of a sieving machine in which such flat screens are laminated and vibrated, there are the following problems. Since the material to be sieved is loaded from the top and discharged from the bottom,
In order to incorporate the sieving machine into the production line, a lift for charging the object to be sieved or a lift for charging the next process is required. Since a flat screen is used, the size of the sieving apparatus is large in order to take a sieving distance. Noise is loud due to the use of vibration.

[0005] The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to remove an object to be sieved from a position higher than a charging position and to increase a sieving distance. Another object of the present invention is to provide a sieve having less noise.

[0006]

According to the first aspect of the present invention, there is provided a cylindrical screen, a roller for rotatably supporting the screen at an angle, and a driving device for rotating the roller. A spiral helical guide provided in the screen, an input hopper provided below the screen to supply an object to be sieved, and a product take-out unit provided along the screen to take out sieved products.

[0007] The cylindrical screen is set obliquely so that the side to be sieved is on the lower side and the side for taking out the product is on the upper side.
It is rotatably supported by rollers. When the object to be sieved is thrown in from the input hopper and the driving device is rotated, the object to be sieved is rotated while being spirally guided, and is sieved by the screen. The object to be sieved that has been sifted while rising as described above is taken out as a product from the product take-out section. Thereby, the product can be taken out from a position higher than the charging position. Further, by forming the screen into a cylindrical shape and a three-dimensional shape, the sieving distance can be increased, and the size of the apparatus can be reduced. Further, since the sieving operation is performed by rotation, noise is reduced as compared with the vibration method.

According to the second aspect of the invention, the mesh of the screen changes in the direction of the cylindrical axis, and becomes larger as it goes upward.

With this configuration, it is possible to classify the object to be sieved for each particle size. A product take-out port is provided at a position corresponding to the change position of the mesh, and the classified product can be taken out.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of a cylindrical screen rotary sieving machine of an embodiment. FIG. 2 is a cross-sectional view of FIG.
3 shows a cross section, and FIG. 3 shows a YY cross section of FIG. The cylindrical screen 1 is provided at both ends with a cylindrical end 1a whose periphery is covered with a metal plate, and in the middle is a first mesh portion 1 having a mesh smaller than the lower side.
a, a second mesh portion 1b of a mesh larger than 1a is provided, and the first mesh portion 1a is inclined so as to be lower than the second mesh portion 1b. A spiral 2 is provided along the inner surface of the cylindrical screen, and the object to be sieved is raised by rotation of the cylindrical screen 1. As shown in FIG. 3, two rollers are provided on the lower ends of the cylindrical ends 1a on both sides. The upper roller is the upper roller 3 and the lower roller is the lower roller 4.

One (or both) of the lower rollers 4 is driven to rotate by a driving device 5 such as an electric motor. A charging hopper 6 is provided at the lower cylindrical end 1a, and the material to be sieved is charged. A receiver 7 is provided on the lower surface of the first mesh portion 1b and the second mesh portion 1c, and is separated by a partition member 7a at a boundary position between the two mesh portions 1b and 1c. A cover 8 is provided on an upper portion of the receiver 7 so as to cover the first mesh portion 1b and the second mesh portion 1c, thereby preventing the objects to be sieved from scattering. In the lower part of the first mesh part 1b of the receiver 7, a fine powder outlet 9 for extracting fine powder, and in the lower part of the second mesh part 1c, a first product for extracting particles having a size between the first mesh and the second mesh. Outlet 1
0 is provided. At the upper end of the upper cylindrical end 1a, a second product take-out port 1 for taking out particles larger than the second mesh
1 is provided. The upper roller 3 is supported by a support 12a, and the lower roller is supported by a support 12b.
These columns 12a and 12b are mounted on a gantry 12 having wheels.

Next, the operation will be described. First, the driving device 5 is rotated to rotate the cylindrical screen 1 as shown in FIG. The rotation direction is a direction in which the object to be sieved is raised by the rotation of the spiral 2. Next, an object to be sieved is charged from the charging hopper 6. The material to be sieved enters the lower cylindrical end 1a, rises by the spiral 2 and enters the first mesh portion 1b, and particles passing through the first mesh fall and are taken out from the fine powder outlet 9.

Of the objects to be sieved in the second mesh portion 1c,
The particles that have passed through the mesh fall and fall out of the first product outlet 10.
Taken out. Particles that do not pass through the second mesh are taken out from the second product take-out port 11. Thereby, the first
The particles can be classified into three classes: particles smaller than the network, particles larger than the first network, particles smaller than the second network, and particles larger than the second network. In the embodiment, there are two types of meshes, but any type can be used, and the mesh type can be classified into +1.

[0014]

As is apparent from the above description, the present invention makes it possible to take out the material to be sieved from a position higher than the charging position by using a cylindrical screen rotary sieving machine. Conveyors such as conveyors are not required. In addition, since the sieving distance can be long, the apparatus is compact. Further, since there is no vibration sound, noise countermeasures are not required.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along line YY of FIG. 1;

FIG. 4 is a diagram showing a configuration of a conventional multi-stage vibrating sieving machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical screen 1a Cylindrical end part 1b 1st mesh part 1c 2nd mesh part 2 Spiral 3 Upper roller 4 Lower roller 5 Driving device 6 Input hopper 7 Receiver 8 Cover 9 Fine powder outlet 10 First product outlet 11 Second product outlet Mouth 12 Stand 12a, 12b Prop

Claims (2)

[Claims] 1. A cylindrical screen, a roller that supports the screen in an inclined and rotatable manner, a driving device that drives the roller to rotate, a spiral guide provided in the screen, and a lower part of the screen. A rotary sieving machine having a cylindrical screen, comprising: a charging hopper provided on the screen for supplying an object to be sieved; and a product take-out unit provided along the screen to take out sieved products. 2. The rotary screen sieving machine according to claim 1, wherein the mesh of the screen changes in the direction of the cylindrical axis, and increases as it goes upward.