JPH09234428A - Waste classifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the screen from being clogged and to improve screening efficiency of the classifier by placing a screen so as to be freely rotatable in the passage inside one of two chambers divided by a baffle plate and bringing a scraper into slidable contact with a rotary surface of the suction side of this screen. SOLUTION: In this classifier, when waste is charged into a chamber 3, a comparatively heavier part of the waste rollides against a baffle plate 2 and allowed to fall downward by gravity in the chamber 3 to be accumulated there. On the other hand, the other comparatively lighter part of the waste moves in a suspended state along an air stream to another chamber 4 and is deposited on a rotary surface 14A of a screen 14 placed in the chamber 4. At this time, the screen 14 is rotated by a motor 18 and cleaned by scraping the deposited material on the rotary surface 14A with a scraper 20, and also, the collected material by the screen 14 is allowed to fall downward in the chamber 4 to be accumulated there. When the amount of the accumulated material reaches a specified level, the material is discharged from the chamber 4 through a discharge port 12 by using a rotary valve 11. The finer material passing through openings 15 of the screen 14 is further classified by another classifier 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind power classification device in an air transfer system for treating waste.

[0002]

2. Description of the Related Art For example, as shown in FIG. 3, a classifying apparatus for classifying suspended particles by aerodynamic force into coarse, fine, fine and ultra fine particles by passing through a screen mesh is shown in FIG. A blower 32 is supported by a bearing 33 in the case 31, and the blower 32 is
It is fixed to a rotatable body 35 to which 4 is attached, and the rotational force by an electric motor (not shown) is transmitted to the pulley 34 and the body 35 via a belt to rotate the blower 32 to rotate the case. An air flow F is generated in 31. Two primary screens 36 and a secondary screen 37 are provided in the middle of this air flow F, and the powders and granules are forcedly passed through these screens 36 and 37 for classification. Screen 3
The back surfaces 36B and 37B of the nozzles 6 and 37 are rotatably supported by bearings 38 by a motor (not shown) via a belt, and the nozzle 4 is attached to the end of a hollow rotary shaft 40 having a pulley 39 attached.
Nos. 1 and 42 are provided, and the nozzles 41 and 42 rotate on the back surfaces 36B and 37B of the screens 36 and 37 at regular intervals and rotate together with the hollow rotating shaft 40. Then, compressed air is supplied into the hollow rotating shaft 40, and the nozzles 41, 42
More air is on the backsides 36B and 37B of the screens 36 and 37.
It is supposed to gush out.

The granular material supplied from the raw material supply port 43 by a feeder (not shown) is caused by the flow of air sucked from the secondary air suction port 44 as the blower 32 rotates.
The coarse particles uniformly dispersed in the case 31 and sorted out by the primary screen 36 are discharged from the coarse powder discharge port 46 through the rotary valve 45. The medium powder and the fine powder that have passed through the primary screen 36 are more evenly dispersed in the case 31, and are sorted by the secondary screen 37 into the medium powder and the fine powder. The medium powder is discharged to the outside of the apparatus from the medium powder discharge port 48 through the rotary valve 47, and the fine powder is further conveyed from the outlet 49 to the next-stage classification device for classification. In this way, when classifying powders and granules, the back surface of the screen is constantly washed by injecting air from the nozzle that rotates the clogging and clogging of the screen of the powders and granules. There is a device that prevents clogging and effectively uses the screen surface to obtain the sorting efficiency.

[0004]

By the way, in the above classifying device, when classifying an object to be classified, air is generated from a nozzle rotating a seizure or clogging that occurs on the screen surface of the object to be classified. The back surface of the screen is constantly cleaned by spraying with a sprayer to prevent clogging.However, even if the objects to be classified are in the same floating state, vinyl pieces or In the waste containing paper pieces, the vinyl pieces and paper pieces in the waste adhere to the screen surface, and even if air is jetted from the rotating nozzle, the vinyl particles adhere to the screen surface. However, there is a problem in that the scraps and paper chips cannot be removed, and the seizure and clogging occur, which may hinder the sorting efficiency of the objects to be classified.

Therefore, according to the present invention, even if a waste containing a piece of vinyl or a piece of paper having a different shape or material as an object to be classified, the seizure and clogging occurring on the screen surface are prevented. ,
(EN) Provided is a classification device which effectively uses a screen surface to improve the screening efficiency.

[0006]

SUMMARY OF THE INVENTION A first aspect of the present invention is to provide a main body frame, two chambers that communicate with each other by dividing the inside of the main body frame with a baffle plate, and an intake port provided in one chamber. And an opening, a communication passage and an opening communicating with an outlet provided in the other chamber, a rotary valve provided at a discharge port provided continuously with the opening, and a screen provided so as to close the communication passage. , A means for supporting and rotating the screen, and a scraper provided so as to slidably contact the suction side rotation surface of the screen.

In the second invention, the screen has holes formed at equal pitch intervals in a disk made of resin or metal.

In the third invention, the scraper is an arm provided with a spring member which rotates about a support shaft provided on an angle attached to the frame side of the main body and biases in one direction. It has a slidable contact portion at the tip of the head and is made swingable.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 (A), the classification device according to this embodiment has a main body frame 1
Is divided by a baffle plate 2, and two chambers 3 and 4 communicating with each other at the upper part are provided.

The chamber 3 is provided with a suction port 5 into which waste to be classified is inserted, and a lower end opening 6 is communicated with a discharge port 8 via a rotary valve 7. .

Further, one end of the chamber 4 communicates with the chamber 3 at the upper end side, and the other end of the chamber 4 has the following classification device (cyclone)
An outlet 9 communicating with 19 is provided, and a lower end opening 10
Is connected to a discharge port 12 via a rotary valve 11.

A passage 13 connecting the chamber 4 and the outlet 9
A screen 14 is provided so as to close the frame, and the screen 14 is a resin or metal disk-shaped, and has holes 15 of a constant size formed at a constant pitch on the entire surface. It is fastened to a rotating shaft 17 which is supported by a bearing 16 provided in 1. When the rotating shaft 17 is rotated by a driving device such as an electric motor 18 installed in the main body frame 1, the screen 14 is rotated.
Rotates.

As shown in FIG. 1B, a scraper 20 is provided at the lower end of the chamber 4 so as to press the rotary surface 14A on the suction side of the screen 14.

The scraper 20 includes an arm 24 provided with a spring member 23 which rotates about a support shaft 22 provided on an angle 21 attached to the body frame 1 side and biases it in one direction. A head portion 26 having a sliding contact portion 27 is swingably attached to a tip end thereof via a universal joint 25, and the head portion 26 is kept in sliding contact with the rotating surface 14A of the screen 14 in parallel at all times. Moreover, it is installed detachably.

The pressing force for pressing the scraper 20 against the suction-side rotating surface 14A of the screen 14 can be appropriately adjusted by replacing the detachable spring member 23.

The sliding contact portion 27 of the scraper 20 is embedded with a fibrous member of synthetic fiber or metal, and the screen 14 is rotated by the rotation of the electric motor 18 to rotate the screen. While scraping the rotating surface 14A of the scraper 20 with the sliding contact portion 27 of the scraper 20, the vinyl pieces and the paper pieces attached to the rotating surface 14 are scraped off.

In the screen 14, the size, pitch, and material of the holes 15 formed in the screen 14 can be changed according to the member to be classified.

The air flow F generated in the main body frame 1 flows to the suction port 5, the chamber 3, the chamber 4, the screen 14, the passage 13 and the outlet 9 by an air pressure source (not shown), and the next stage. It is connected to a classifier (cyclone) 19 by a pipe line.

With the above-mentioned structure, the operation will be described. As shown in FIG. 2, the waste material is carried by the airflow F generated in the main body frame 1 and is inserted into the chamber 3 from the intake port 5 of the main body frame 1 to float. , It collides with the baffle plate 2, falls below the chamber 3 due to its own weight and accumulates, and when it reaches a certain amount, it is discharged to the discharge port 8 via the rotary valve 7.

The relatively light pieces of vinyl, paper, and the like further float on the air flow F and float from the chamber 3 to the chamber 4, and on the way to the outlet 9 side, the rotating surface 1 of the screen 14 is moved.
4A is once attached, but the screen 14 is rotated by the electric motor 18, and the scraper 20 scrapes off the vinyl pieces and paper pieces attached to the rotating surface 14A of the screen 14 to clean the rotating surface 14A. To

As a result, the finer screen 14
Is constantly classified, and falls below the chamber 4 to accumulate,
When it becomes a certain amount, it is discharged through the rotary valve 11 to the outlet 1.
Discharge to 2.

The fine particles that have passed through the holes 15 of the screen 14 are conveyed for further classification by the next classifying device 19.

As described above, even if the waste contains vinyl pieces and paper pieces having different shapes and materials as the objects to be classified, the seizure and clogging that occur on the rotating surface 14A of the screen are prevented. However, the screen surface 14A can be effectively used to improve the sorting efficiency of the waste.

Further, in the screen 14, the size, pitch, and material of the holes 15 formed in the screen 14 can be changed according to the member to be classified.

Further, the pushing force of the scraper 20 for pushing the rotating surface 14A of the screen 14 is also changed by replacing the spring member 23, and the material of the sliding portion 27 is also adjusted to the material of the screen 14. The rotating surface 14
The member attached to A can be easily dealt with.

[0026]

According to the first aspect of the invention, a main body frame,
Two chambers that communicate with each other by partitioning the inside of the main body frame with a baffle plate, an intake port and an opening provided in one chamber, and a communication passage and an opening that communicate with an outlet provided in the other chamber. A rotary valve provided at the outlet connected to the opening, a screen provided so as to close the communication passage, a means for supporting and rotating the screen, and a rotation surface on the suction side of the screen. Screen provided to slide
Since it is equipped with a screen, even if it is a waste containing vinyl pieces and paper pieces that differ in shape and material as the objects to be classified,
While scraping the rotating surface of the screen with the scraper's sliding contact by the rotation of the screen, the vinyl pieces and paper pieces adhering to the rotating surface are scraped off. Since the rotation surface is always cleaned continuously, the rotation surface of the screen can be used effectively, and the sorting efficiency of waste can be greatly improved, and the classification cost of waste can be reduced. It can be reduced.

According to the second invention, the screen is
Since holes are made in the disc made of resin or metal at equal pitch intervals, the screen should be adjusted according to the member to be classified.
The size and pitch of the holes formed in the holes can be easily processed, and the material can be changed appropriately.

According to the third invention, the scraper is
A swingable head having a sliding contact portion at the tip of an arm provided with a spring member for rotating in one direction while rotating about a support shaft provided on an angle attached to the body frame side. The scraper head is kept in sliding contact with the screen surface at all times in parallel, and the scraper head is kept on the rotating surface on the suction port side of the screen. Since the pressing force for pressing the head portion can be easily adjusted by appropriately replacing the detachable spring member, it is possible to correspond to the member attached to the screen.

[Brief description of drawings]

FIG. 1 shows a classification device according to an embodiment of the present invention,
(A) is a structural drawing, (B) is an enlarged view of the E portion of (A).

FIG. 2 is an explanatory diagram which similarly illustrates the operation.

FIG. 3 is a structural diagram of a classification device showing a conventional example.

[Explanation of symbols]

 1 Body Frame 2 Baffle Plate 3 Chamber 4 Chamber 5 Inlet 6 Opening 7 Rotary Valve 8 Outlet 9 Outlet 10 Opening 11 Rotary Valve 12 Outlet 13 Passage 14 Screen 14A Suction side rotating surface 15 hole 16 bearing 17 rotating shaft 18 electric motor 20 scraper 21 angle 22 support shaft 23 spring member 24 arm 25 universal joint 26 head 27 sliding contact part 31 case 32 blower 36 screen 36B screen -Back side 40 Rotating shaft 41 Nozzle 43 Supply port 44 Suction port 45 Rotary valve 46 Discharge port 49 Outlet F Air flow

Claims (3)

[Claims] 1. A main body frame, two chambers communicating with each other by partitioning the main body frame with a baffle plate, an inlet and an opening provided in one chamber, and another chamber provided in the other chamber. A passage and an opening leading to the outlet, a rotary valve provided at a discharge port connected to the opening, a screen provided to close the passage, and a screen supporting and rotating the screen. And a scraper provided so as to make sliding contact with the suction side rotation surface of the screen. 2. The waste classification device according to claim 1, wherein the screen is made of resin or metal and has holes formed at equal pitch intervals. 3. The scraper slides on the tip of an arm provided with a spring member that rotates about a support shaft provided on an angle attached to the body frame side and biases in one direction. The waste classification device according to claim 1, wherein the waste classification device comprises a swingable head portion having a contact portion.