JP2022088019A - Screen and crushing or crushing processing equipment using it - Google Patents

Abstract

To provide a screen suppressing clogging and capable of increasing treatment efficiency and a crushing or pulverizing treatment device using the same.SOLUTION: In a crushing or pulverizing treatment device,: a rotor for crushing or pulverizing a treating object is disposed at the inside of a casing; a screen is disposed below the rotor; the screen has a screen body 21 partitioning a treatment side and a discharge side; a plurality of discharge holes 22 discharging the treating object from the treatment side to the discharge side are formed at the screen body 21; and each discharge hole 22 has an enlarged part 22A having an inclined side surface so as to be larger toward the discharge side at the discharge side and has a columnar part 22B opened to be columnar at the treatment side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a crushing or crushing treatment apparatus suitable for treating waste, and a screen used therein.

Conventionally, as this type of crushing or crushing processing apparatus, for example, a rotating body for processing is arranged inside the casing, a hopper for charging an object to be processed is provided above the casing, and a screen is provided at the lower part inside the casing. Is known (see, for example, Patent Document 1). In this crushing or crushing processing apparatus, a rotating body for processing is rotated by a driving means such as a motor, and an object to be processed is introduced into a casing to be crushed or crushed to an appropriate size. The crushed or crushed processed material falls below the screen through the discharge holes of the screen.

Japanese Unexamined Patent Publication No. 8-131863

However, in such a crushing or crushing processing apparatus, clogging of the screen is likely to occur, and it is difficult to increase the discharge amount. Therefore, there is a problem that the processing efficiency is low.

The present invention has been made based on such a problem, and an object of the present invention is to provide a screen capable of suppressing clogging and improving processing efficiency, and a crushing or crushing processing apparatus using the screen. do.

The screen of the present invention is used for a crushing or crushing processing apparatus for crushing or crushing an object to be processed, and includes a screen body that separates a processing side and a discharge side, and the screen body has a processing object from the processing side. A plurality of discharge holes for discharging are formed on the discharge side, and each discharge hole has an enlarged portion on the discharge side whose side surface is inclined so as to increase in size toward the discharge side.

The crushing or crushing processing apparatus of the present invention crushes or crushes an object to be processed, and includes a casing, a rotating body for processing installed inside the casing, and a screen of the present invention. ..

According to the present invention, the discharge side of each discharge hole is provided with an enlarged portion whose side surface is inclined so that the size increases toward the discharge side, so that the size of the processed object to pass through each discharge hole is provided. Can be made less likely to cause clogging while keeping the value below a predetermined value. Therefore, the discharge amount can be increased and the processing efficiency can be improved.

It is a partial cross-sectional view which shows the structure of the crusher which concerns on one Embodiment of this invention. It shows the structure of the discharge hole of the screen in the crusher shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of a crushing or crushing treatment apparatus 10 according to an embodiment of the present invention. FIG. 2 is an enlarged representation of the configuration of the screen 20 in the crushing or crushing processing apparatus 10. The crushing or crushing treatment apparatus 10 crushes or crushes an object to be treated such as waste, and has, for example, a casing 11 having a treatment chamber formed inside. A hopper 12 for charging an object to be processed is provided above the casing 11. Inside the casing 11, that is, in the processing chamber, a rotating body 13 for processing for crushing or crushing the object to be processed is rotatably installed horizontally. The processing rotating body 13 is configured to be rotated by a driving means (not shown) such as a motor.

The processing rotating body 13 has, for example, a rotating blade 14 on the outer peripheral surface. The rotary blades 14 are arranged in a spiral parallel manner in the axial direction of the processing rotating body 13, for example. Inside the casing 11, a fixed blade 15 for crushing or crushing the object to be processed in cooperation with the rotary blade 14 is also arranged. Below the processing rotating body 13, for example, a screen 20 is arranged along the rotation locus of the rotating blade 14.

The screen 20 includes a screen main body 21 that partitions the processing side provided with the processing rotating body 13 and the discharge side for discharging the crushed or crushed processed material. The screen main body 21 is made of, for example, a metal such as steel, and is formed in a plate shape curved along the rotation locus of the rotary blade 14. The thickness of the screen body 21 is preferably, for example, 7 mm to 15 mm.

Further, the screen main body 21 is formed with a plurality of discharge holes 22 for discharging the processed material from the processing side to the discharge side. Each discharge hole 22 has, for example, an enlarged portion 22A whose side surface is inclined so that the size increases toward the discharge side on the discharge side, and a columnar portion 22B opened in a cylindrical shape on the treatment side. have. That is, each discharge hole 22 has, for example, a columnar shape having the same opening size from the processing side to the discharge side until the middle, and is inclined so that the size of the opening gradually increases from the middle. .. As a result, in the screen 20, clogging can be made less likely to occur while keeping the size of the processed material to pass through each discharge hole 22 to a predetermined value or less.

The shape of the enlarged portion 22A is preferably, for example, a truncated cone shape, and the inclination angle θ of the side surface is preferably 25 ° or more and 65 ° or less. This is because it is difficult to sufficiently suppress clogging when the temperature is less than 25 °, and the effect of suppressing clogging does not change even if the temperature is larger than 65 °, and conversely, the strength is lowered. A more preferable inclination angle θ of the side surface is 30 ° or more and 50 ° or less. The inclination angle θ of the side surface of the enlarged portion 22A means an angle between the extended surface 22C in which the side surface of the cylindrical portion 22B is extended to the enlarged portion 22A and the side surface of the enlarged portion 22A.

The length of the columnar portion 22B (the length in the thickness direction of the screen body 21) is preferably 3 mm or more and 5 mm or less, for example. If it is less than 3 mm, it is difficult to obtain sufficient strength, and if it is longer than 5 mm, the length of the enlarged portion 22A (the length in the thickness direction of the screen body 21) becomes short, and the effect of suppressing clogging becomes small. be. The diameter of the cylindrical portion 22B is preferably 50 mm or less, for example. This is because if it is larger than 50 mm, the effect of providing the enlarged portion 22A is small. Further, the diameter of the cylindrical portion 22B is preferably 8 mm or more, for example.

This crushing or crushing treatment device is used, for example, as follows. First, for example, the rotating body 13 for processing is rotated by a driving means (not shown), the object to be processed is charged from the hopper 12, and the object to be processed is crushed or crushed to an appropriate size inside the casing 11. The crushed or crushed processed material falls below the screen 20 through the discharge hole 22 of the screen 20. At that time, since the enlarged portion 22A is provided in each discharge hole 22, clogging is suppressed.

As an example, the plastic waste was crushed using the crushing or crushing treatment apparatus 10 described above. The thickness of the screen 20 was 10 mm, the diameter of the cylindrical portion 22B of the discharge hole 22 was 10 mm, the length of the cylindrical portion 22B was 4 mm, and the inclination angle of the side surface of the enlarged portion 22A was 45 °. Further, as a comparative example, the plastic waste was pulverized in the same manner as in the other examples, except that a screen having a columnar shape of the discharge hole was used. As a result, a discharge amount of about 400 kg / h was obtained in the examples, but only a discharge amount of about 300 kg / h was obtained in the comparative example. That is, it was found that the crushing or crushing treatment apparatus 10 of the present embodiment can significantly improve the treatment efficiency.

As described above, according to the present embodiment, the enlarged portion 22A whose side surface is inclined so as to increase in size toward the discharge side is provided on the discharge side of each discharge hole 22. Therefore, each discharge hole is provided. It is possible to prevent clogging while keeping the size of the processed material to pass through 22 to a predetermined value or less. Therefore, the discharge amount can be increased and the processing efficiency can be improved.

Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments and can be variously modified. For example, in the above-described embodiment, each component has been specifically described, but not all the components may be provided, or other components may be provided.

Further, in the above embodiment, the configuration of the crushing or crushing processing apparatus 10 has been specifically described, but the configuration is not limited to the above configuration, and other configurations may be included.

10 ... Crushing or crushing processing device, 11 ... Casing, 12 ... Hopper, 13 ... Rotating body for processing, 14 ... Rotary blade, 15 ... Fixed blade, 20 ... Screen, 21 ... Screen body, 22 ... Discharge hole, 22A ... Enlargement Part, 22B ... Cylindrical part, 22C ... Extension surface

Claims (4)

A screen used in a crushing or crushing processing device that crushes or crushes an object to be processed.
Equipped with a screen body that separates the processing side and the discharge side,
The screen body is formed with a plurality of discharge holes for discharging the processed material from the processing side to the discharge side.
Each of the discharge holes has an enlarged portion on the discharge side whose side surface is inclined so as to increase in size toward the discharge side. The screen according to claim 1, wherein in each of the discharge holes, the inclination angle of the side surface of the enlarged portion is 25 ° or more and 65 ° or less. Each of the discharge holes has a cylindrical columnar portion on the processing side of the screen body.
The length of the columnar portion is 3 mm or more and 5 mm or less.
The screen according to claim 1 or 2, wherein the diameter of the columnar portion is 50 mm or less. A crushing or crushing treatment device that crushes or crushes the object to be processed.
With the casing
The processing rotating body installed inside the casing and
A crushing or crushing processing apparatus comprising the screen according to any one of claims 1 to 3.

Images