JP3070173B2 - Vibration sieve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating screen device,
For example, the present invention relates to an apparatus suitable for separating construction waste into incombustibles and combustibles.

[0002]

2. Description of the Related Art Recently, the treatment of municipal solid waste has become a major social problem. Among them, various problems have been raised regarding the problem of crashing construction waste and separating it into incombustibles and combustibles. Has raised.

Hitherto, a vibrating screen has been used as a device for separating waste building materials into incombustibles and combustibles, in which a screen having a predetermined mesh is stretched in a casing thereof. While this casing is vibrated by, for example, a pair of vibrating electric motors, and conveyed on the screen by vibrating by a pair of vibrating motors, it is separated into a screen under the screen and a screen above the screen. They are separated and collected, and paper, plastic sheets, wood chips and the like are collected as combustible materials on the sieve. That is, metal dust, rubble, pebbles, and the like as incombustible materials generally have a small particle size, and wood chips, paper, plastic sheets, and the like are relatively bulky, and are separated on a sieve because of their large particle size. However, some of the combustibles have a smaller particle size as the sieve goes down. For example, wood chips and paper chips smaller than the mesh of the screen are often separated and accommodated in the incombustibles.

[0004] In view of the above problems, the present applicant generally disposes a waste separation apparatus for separating non-combustible substances and combustible substances, for example, a construction waste material capable of separating construction waste materials into non-combustible substances and combustible substances with a sufficiently high degree of selection. A screen having a predetermined mesh size is stretched in a closed casing for the purpose of providing, and the casing is vibrated while ejecting air upward from below the screen, so that the casing is vibrated. A vibrating screen that conveys the refuse in a fluidized state, and a wind separator that receives the sieving of the vibrating screen and separates the refuse into relatively large refuse and relatively small refuse. The relatively heavy specific waste discharged from the wind separator is received as incombustible waste, and the relatively small specific waste discharged from the wind separator is combustible waste. It has proposed a dust separating apparatus according to claim to the fact as to receive (Japanese Patent Application No. 3-160
027).

FIG. 4 shows the whole of a specific example of the above device.
The construction waste separation apparatus is indicated generally by 10 and has a vibrating screen 1 on the uppermost stream side and a wind sifter 2 for receiving on the sieve.
And a non-combustible material recovery container 3 which receives as waste having a relatively high specific gravity and a combustible material recovery container 4 which recovers as waste having a relatively low specific gravity. Further, the portion below the screen of the vibrating screen 1 is discharged to the incombustibles recovery container 3 side.

FIG. 5 shows the details of the vibrating screen 1 shown in FIG.
, A punch metal 12 is stretched as a screen inside a substantially rectangular closed casing 11.
Thereby, the inside of the closed casing 11 is defined by an upper space 19 and a lower space 18, and an air ejection pipe 17 is connected to a rear wall portion of the casing 11 so as to communicate with the lower space 18, through which the air is compressed from the outside. Air is introduced into the lower space 18 in the closed casing 11. The upper space 19 is formed as an upper air passage in the closed casing 11, and a pair of ducts 15 and 16 are provided in the upper wall. In addition, closed casing 1
The right end of 1 has an upper sieve discharge port 13 and a lower sieve discharge port 14.

[0007] A pair of drive unit mounting plates 21, 21 are mounted on the bottom wall of the closed casing 11, and vibration motors 22a, 22b having a known structure are mounted on each of them. Further, the closed casing 11 includes a pair of columns 2.
3 and 24 are supported via anti-vibration springs 25 and 26. The columns 23 and 24 are supported on a base 27,
It is assumed that the base 27 is provided so as to be adjusted in height with respect to the wind separator 2 shown in FIG. The punch metal 12 has a predetermined mesh size, that is, the punch metal 12 is formed by forming a large number of round holes having a predetermined diameter in a metal plate, for example, in a grid pattern. For example, the diameter is 5 mm. The width of the closed casing 11 is 1.5 to 1.8 m.
And the capacity of the vibration motor is 5.5 kW or 7.5
It is about kw. Further, it is assumed that a hopper 20 is provided at the left end of the closed casing 11 and stores garbage waste. Actually, it is considerably larger than the closed casing 11, but is shown in a reduced size for simplification. Although the construction waste material waste has an apparent specific gravity of 0.6 to 0.8, it is assumed that 15 to 20 m ³ is processed per hour.

In FIG. 5, a large amount of building waste is stored in the hopper 20 and discharged from the left end of the closed casing 11 of the vibrating screen 1. The closed casing 1 is driven by the driving of the vibration motors 22a and 22b.
1 vibrates in the direction of the arrow a, whereby the building waste debris is transferred to the right side in FIG. The lower space 18 of the screen 12 during the transfer
Compressed air is introduced into the screen 12 through the conduit 17 and is ejected toward the upper space 19 side of the screen 12, so that the dust on the screen 12 is in a flowing state, and the dust having a relatively small specific gravity moves to the upper part of the dust layer. The dust occupying and having a relatively large specific gravity is transferred by vibration while taking a position below the dust layer, that is, a position close to the screen 12. As a result, dust smaller than the mesh of the screen 12 falls down to the lower space 18 side as a sieve, and dust larger than the mesh is transferred to the right as a result of vibration on the sieve and is discharged from the discharge port 13 to the next-stage air filter. 2 and the lower part of the sieve is discharged from the discharge port 14 into the incombustibles recovery container 3 in FIG. Although the refuse is transported on the screen 12 in a fluidized state, the refuse is relatively small in specific gravity. Even if the refuse is smaller than the mesh of the screen 12, the refuse is in a fluidized state. , The air sifter 2 passes through the outlet 13 as a sieve.
Will be supplied. In addition, dust which is smaller than the mesh of the screen 12 and has a relatively large specific gravity
Is emitted as incombustibles. In particular, dust, small pieces of paper and wood that are close to ash are surely dusted, and the screen 1
Without being dropped below 2, the waste is supplied to the wind separator 2 from the discharge port 13 as the upper layer waste as it is on the sieve.

As described above, building waste M is separated into combustibles and non-combustibles. However, the screen M is separated into non-combustibles and combustibles by a mesh size on the upstream vibrating screen 1 and is subjected to wind screening. Because it is supplied to the machine 2,
The load is kept low, and therefore, the degree of selection is kept high.Where the waste having a relatively high specific gravity is separated from the waste having a relatively low specific gravity, the latter is separated as combustible and the former is separated as incombustible. However, in the vibrating screen 1, even if the dust is smaller than the mesh, combustible waste such as dust having a small specific gravity is transferred as the upper layer and is almost certainly supplied to the wind separator 2. Here, refuse having a relatively small specific gravity is supplied to the combustible material side.
Therefore, metal scraps, rubble, stones, and the like as incombustibles can be reliably collected as incombustibles.

Although the apparatus proposed by the applicant has the above-described functions and effects, the vibrating screen 1 needs to blow air sufficiently above the screen 12. If this is not sufficient, the above-described functions and effects cannot be obtained. However, there is a considerable amount of air that escapes to the discharge port 14 side, and in some cases, the airflow component that escapes above the screen 12 may be insufficient.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a vibrating sieve device capable of reliably supplying a sufficient air flow component to a position above a screen.

[0012]

The object of the present invention is to stretch a screen having a predetermined mesh size in a closed casing and vibrate the casing while blowing air upward from below the screen. The material on the screen is conveyed while being in a fluidized state, and the material on the screen above the screen is discharged outward from a screen upper discharge port formed integrally with the casing, and the material below the screen below the screen is discharged. Is a vibrating sieve device configured to discharge outwardly from a lower sieve discharge port formed integrally with the casing, wherein a flexible space for transferring the lower sieve material and the lower sieve discharge port are cut off. A plate-like member is provided, and when the material under the sieve is transferred through the space by vibration, the material under the sieve causes the plate-like member to bend. Ri, vibrating screen device being characterized in that so as to be guided to the sieve bottom outlet, is accomplished by. Alternatively, a screen having a predetermined mesh size is stretched in a closed casing, and while blowing air upward from below the screen, the casing is vibrated to make the material on the screen flowable. Conveyed, the upper material of the screen above the screen is discharged outward from the upper discharge port of the sieve formed integrally with the casing, and the lower material of the screen below the screen is discharged under the sieve formed integrally with the casing. In a vibrating sieve device configured to discharge outward from a discharge port, a plate whose upper end is pivotally connected to the screen side so as to shut off a space for transferring the material under the sieve and the discharge port under the sieve. When the sieving material is suspended in the space by vibration and the sieving material is transferred through the space, the sieving material is pushed by the plate-like member. , Vibrating screen device being characterized in that so as to be guided to the sieve bottom outlet, is accomplished by.

[0013]

An opening for communicating with the compressed air supply means is provided in a part of the closed casing in order to blow air upward from below the screen. Is squirted. If no material, for example debris, is being transported above the screen, no material is sieved under the screen and therefore no debris is transported through the space under the sieve. At this time, the air introduced below the screen does not flow out through the outlet below the sieve. That is, this is because the air flow is blocked by a flexible plate-shaped member so as to block the space under the sieve and the outlet under the sieve, but when dust is supplied on the screen, this is caused by the vibration of the casing. Is transported on the screen, and is transported while being made to flow by the air ejected upward from below the screen, and the refuse that has become the material under the sieve during the transport is transported to the discharge port under the sieve. When a flexible plate-shaped member provided near the lower sieve discharge port is reached, the plate-like member is bent by a transfer force due to vibration, and can be led out to the lower sieve discharge port. When the material under the sieve has not passed through the plate-like member, the plate-like member blocks the lower sieve discharge port and the space below the sieve. All the air from the jetting means can be guided upward through the screen without flowing out from the outlet below the sieve, so that the jetted air can be used effectively and a constant jet air supply source can be used. On the other hand, a large fluidizing action can be given to dust on the screen.

In the case of a plate-like member whose upper end is pivotally attached to the screen side and is suspended, when the dust is not transferred on the screen, the jet air from the jet air supply means discharges the air under the sieve. From the screen and all are directed upward through the screen mesh. And when the refuse is transferred on the screen, the refuse below the screen by the screen is transferred by vibration in the space below the screen, and when reaching the plate-like member, this upper end is pivotally attached to the screen side. Therefore, it is rotated around its pivot axis to form a gap communicating the space under the sieve and the discharge outlet under the sieve, through which dust under the sieve is discharged from the discharge outlet under the sieve. Can be Even in this case, the plate-like member always shuts off the space below the sieve and the discharge outlet below the sieve unless the material below the sieve passes through the plate-like member. The generated air is effectively guided only above the screen so that the dust on the screen can be efficiently fluidized.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vibration sieve device according to an embodiment of the present invention will be described with reference to FIGS.

Parts corresponding to those in FIG. 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, according to this embodiment, the air shutoff device 50 is provided between the space 18 below the sieve and the outlet 14 below the sieve.
Is provided, but the others are exactly the same as the conventional one.

Next, the air shut-off device 50 according to the present invention will be described with reference to FIG. That is, this device 50
Is provided below the screen 12, but has a cross section L
A mounting member 51 having a U-shape and a plate-like member 52 made of an elastic material, for example, rubber, are fixed at an upper end portion of the plate-like member 52 to the mounting member 51 with an adhesive, and a lower end portion of the casing 11 The lower space 18 which is in contact with the bottom wall 11a
And a space 14 </ b> A communicating with the lower sieve discharge port 14.

When the material m to be sieved is transferred through the space 18 under the sieve by vibration, the plate-like member 52 is moved by the dust m subjected to the transfer force due to the vibration, as shown in FIG. Deflected as indicated by. As a result, the space under the sieve 18 communicates with the space 14A for communicating with the discharge opening under the sieve, through which the lower waste m is discharged to the outside.

As described above, the plate-like member 52 shuts off the lower sieve space 18 and the lower sieve discharge port communication space 14A as shown in FIG. 2A unless the lower sieve m passes therethrough. As a result, the ejected air is not exhausted to the outside from the outlet 14, so that all the ejected air can blow upward through the screen 12, thereby making the fluidization of dust on the screen 12 larger than before. Not only can be improved, but also the blow-up force of the jet air can be made larger on average than before. As in the present embodiment, among the waste of construction waste, the waste having a small specific gravity and smaller than the opening of the sieve mesh can be surely guided to the outlet 13 of the upper sieve material as the upper sieve material, separated from the screen 12 and above. it can.

FIG. 3A shows a second embodiment. In this embodiment, an attachment member 61 having an L-shaped cross section is fixed to the lower surface of the screen 12 by welding, for example. The upper end of the plate member 62 made of metal is pivotally attached to the shaft 63. The shaft 63 has a normal hinge structure used for a door or the like.

When the lower garbage m is transferred to the right in FIG. 3B while receiving the transfer force due to vibration, the garbage m abuts on the lower end of the plate member 12 and pushes it. By rotating the shaft around the shaft 63 as shown by the arrow, a gap is formed between the space 18 below the sieve and the space 14A communicating with the outlet 14 below the sieve, and the dust m is passed through the space as shown in FIG. It is discharged outward through the lower discharge port 14.

Also in this embodiment, since the lower air m is not discharged to the lower outlet 14 of the sieve, the jet air is not exhausted to the lower outlet of the sieve 62 unless the plate-like member 62 is pushed when passing therethrough.
The jet air can be effectively used as in the embodiment,
For example, combustible and incombustible waste such as construction waste can be efficiently and accurately separated.

Although the embodiment of the present invention has been described above, the present invention is, of course, not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, in the first embodiment, the plate member 52 is made of rubber, but may be made of another material, for example, cloth.

[0026]

As described above, according to the vibrating sieve of the present invention, the air blown into the space below the sieve is efficiently led out to the upper part of the screen, and thus the fluidization of the material on the screen is sufficiently performed. And the jet air can be used effectively.

[Brief description of the drawings]

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

2A is an enlarged cross-sectional view of the main part, and FIG. 2B is an enlarged cross-sectional view for explaining the operation of the main part.

FIG. 3A is an enlarged cross-sectional view of a main part of a second embodiment of the present invention, and FIG. 3B is an enlarged cross-sectional view for explaining the operation of the main part.

FIG. 4 is a side view showing an entire construction waste material separating apparatus according to a conventional example.

FIG. 5 is a partially broken side view showing details of a vibrating screen in the same device.

[Description of Signs] 50 Air shutoff device 60 Air shutoff device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B07B 4/08

Claims (2)

(57) [Claims] 1. A screen having a predetermined mesh size is stretched in a closed casing, and the casing is vibrated while air is blown upward from below the screen, so that a material on the screen is removed. The material is conveyed while being in a fluidized state, and the upper material of the screen above the screen is discharged outward from the upper discharge port formed integrally with the casing, and the lower material of the screen below the screen is integrally formed with the casing. In a vibrating sieve device configured to discharge outward from a lower sieve discharge port, a flexible plate member is provided so as to block a space for transferring the lower sieve material and the lower sieve discharge port, When the material is transferred through the space by vibration, the material under the sieve is bent to the discharge port under the sieve by bending the plate-like member. A vibration sieving device characterized by being guided. 2. A screen having a predetermined mesh size is stretched in an airtight casing, and the casing is vibrated while blowing air upward from below the screen to remove the material on the screen. The material is conveyed while being in a fluidized state, and the upper material of the screen above the screen is discharged outward from the upper discharge port formed integrally with the casing, and the lower material of the screen below the screen is integrally formed with the casing. In a vibrating sieve device configured to discharge outward from a lower sieve discharge port, an upper end of the vibrating sieve is pivoted to the screen side so as to shut off a space for transferring the lower sieve material and the lower sieve discharge port. The plate-like member to be attached is suspended, and when the material under the sieve is transferred through the space by vibration, the material under the sieve pushes the plate-like member. A vibrating sieve device, wherein the vibrating sieve device is guided to the discharge outlet below the sieve.