JP2002035633A - Constant volume conveyor and shredded material treatment equipment provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constant volume conveyor which is capable of continuously performing constant volume conveyance of a shredded material to be conveyed without causing any clogging or any bridging phenomenon even when the material has a low bulk density, and thereby preventing the operating efficiency of a shredded material treatment equipment provided with the conveyor from being reduced. SOLUTION: This constant volume conveyor 1 is provided with a stock tank 10 for storing a shredded material to be conveyed S, a dividing/delivery means 13 consists of a group of a plurality of rotors 20 parallel to each other, which are horizontally placed in parallel so as to partition the inside of the stock tank 10 into an upper section and a lower section and each of which is provided on its outer peripheral surface with a plurality of projecting blades 22 for receiving the material to be conveyed S, a feed means 12 which is connected to a certain part of the stock tank 10, positioned below the dividing/delivery means 13, and used for continuously conveying the material to be conveyed S, and a drive means 23 for rotating arbitrary adjacent two of the group of the constituent rotors 20 of the dividing/delivery means 13, in such a way that the opposite insides to each other of the adjacent two rotors 20 are moved downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed-quantity transfer device and a crushed material processing facility having the device.

[0002]

2. Description of the Related Art In recent years, it has become necessary not only in the industrial world but also on a global scale to consider processing and recycling of waste materials such as industrial wastes. For example, in the case of waste plastic collected from factories and households, it is reused as a substitute auxiliary fuel in blast furnaces and other ore reducing agents,
In order to reuse such waste materials including waste plastics, a crushed material processing facility for grinding the waste materials to a certain size and reusing them as a raw material is required.

[0003] As such a crushed material treatment facility, there is provided a shredder for crushing waste material so that the material can be conveyed by air, a separation device comprising a cyclone for separating a conveyed object crushed by the shredder and conveyed from the air, and It is known to have a fixed-quantity conveyance device for storing and quantitatively discharging the conveyed objects separated by a cyclone, and a dust collecting device for removing dust from air from which the conveyed objects are separated. ing.

[0004] Conventionally, the above-mentioned fixed-quantity transfer device is
A cyclone is connected to the upper part and has a taper part tapered downward at the lower part.A stock tank is connected to a lower end of the taper part of the stock tank, and a conveyed object in the tank is turned sideways. And a screw feeder that feeds in a certain direction.

[0005]

The crushed material obtained by crushing the waste plastic has a small bulk density of about 0.03 to 0.5, and the size of each flake is 5 to 1.
Since it has a characteristic of a large variation of about 00 mm, when it is stored in a stock tank, it tends to be stored in a state where the difference in density is large depending on the location. However, in the above-mentioned conventional fixed-quantity conveying device, the conveyed object is uniformly fed in a fixed lateral direction by a screw feeder connected to the lower end of the tapered portion, and therefore, the condensed material having a sharp difference in density such as the crushed material is used. When a conveyed object is supplied, clogging tends to occur in the feeder, which makes it difficult to convey the conveyed object quantitatively,
There is a disadvantage that the operation efficiency of the equipment is reduced.

In the case of a conveyed object having a small bulk density, such as a crushed waste plastic, the crushed material sometimes abuts each other below the tapered portion of the stock tank to form a bridge. Then, when the bridge phenomenon of the crushed material occurs in the lower part of the stock tank, the crushed material cannot be continuously supplied from the screw feeder, and the operation efficiency of the equipment is reduced.

The present invention has been made in view of the above-mentioned circumstances, and enables even a conveyed object having a low bulk density to be continuously conveyed without clogging or a bridging phenomenon, thereby improving the operation efficiency of the equipment. The purpose is to prevent it from lowering.

[0008]

Means for Solving the Problems In order to achieve the above object, the present invention has taken the following technical means. That is, the fixed-quantity transport device of the present invention includes a stock tank for storing the transported object, and a plurality of parallel rotor groups each having an overhanging blade on the outer peripheral surface for receiving the transported object. Cutting means configured by being arranged side by side so as to partition in the vertical direction,
A feed unit connected to a portion of the stock tank located below the cut-out unit for continuously transferring the object to be transferred, and an adjacent arbitrary one of a plurality of rotor groups constituting the cut-out unit; Drive means for rotating the rotors so that their opposing inner sides move downward.

According to the present invention, since the rotor group constituting the cutting means has the overhanging blade on the outer peripheral surface for receiving the conveyed object, the conveyed object dropped from the separation device is cut off by the cutting means. Once received by the means, it is stored in the stock tank. afterwards,
When the adjacent arbitrary rotors are rotated by the driving means so that the opposing inner sides thereof move downward, a predetermined amount of the conveyed object is scraped downward by the overhanging blade from between the rotors and supplied to the feed means. Is transported out of the apparatus from the feeding means.

As described above, according to the present invention, the conveyed object received by the group of rotors constituting the cutting means can be extended by the overhanging blade from between any rotors which move so that the opposing inner sides move downward. Since the material is scraped down, even a conveyed object having a low bulk density, such as a crushed waste plastic, can be quantitatively supplied to the feeding means with a small density difference. Clogging is less likely to occur when the transported object is fed out of the apparatus.

In the above-mentioned invention, among the plurality of rotors constituting the cutting means, an object to be conveyed is placed between any two adjacent rotors which rotate so that the inside facing each other moves downward. It is preferable to provide a stirring rotor for dropping. By providing such a stirring rotor, a bridge phenomenon of the transferred object is prevented as much as possible above the cutting means in the stock tank, and the transferred object is reliably and continuously fed to the feed means side. Can be supplied.

Further, in the present invention, it is preferable that the feeding direction of the feed means is arranged so as to be orthogonal to the axial direction of a plurality of rotor groups constituting the cutout means. It is possible to disperse the objects to be dropped from between over a wide range in the conveying direction of the feeding means. For this reason, it is possible to prevent clogging due to the intensive supply of the transported object to the specific portion of the feed unit, and it is possible to reliably and continuously discharge the transported object by the feed unit.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a crushed material processing facility in the case where waste plastic W is to be processed. This processing facility includes a shredder 2 for crushing waste material W so that it can be transported by air, and a shredder 2 for crushing the waste material W. Separating device 14 comprising a condenser for separating the conveyed object S conveyed by air from the conveying air,
The apparatus has a fixed-quantity transport device 1 for storing and quantitatively discharging the transported object S separated by the above, and a dust collecting device 3 for removing dust from the air from which the transported object S is separated.

That is, in this waste treatment plant, the quantitative transport device 1 according to the present invention is a waste plastic W
Is installed downstream of the shredder 2 for pulverizing the powder. A back filter for removing dust generated in a separation device 14 connected to the upper part of the fixed-quantity transport device 1 is provided downstream of the fixed-quantity transport device 1. A dust collecting device 3 comprising:
A suction blower 4 for generating a negative pressure (air suction) in the processing equipment is subsequently installed in this order.

FIG. 2 is an enlarged view of an embodiment of the fixed quantity transport apparatus 1 according to the present invention. It should be noted that there is a slight difference in the pedestal portion 7 and the like from those shown in FIG. 1, but they are basically the same. The fixed-quantity conveyance device 1 of the present embodiment includes:
A stock tank 10 for storing the transported object S sent from the shredder 2, a cutout means 13 for receiving the transported object S in the tank 10 and cutting the transported object S downward by a predetermined amount; Feeding means 12 for continuously transporting the transferred object S connected to a portion located below the cutting means 13
And

The stock tank 10 is formed in the shape of a rectangular tube, and all the upright walls 15 surrounding it are formed as being upright. Therefore, the portion above the cutout means 13 in the stock tank 10 is not provided with a tapered inclination whose main purpose is to narrow down the transported object S intensively. Therefore, the cutting means 13 in the stock tank 10
In the upper portion, the transported object S is less likely to adhere to the inner surface of the upright wall 15, and clogging or bridging due to the growth or stagnation of the transported object S is prevented as much as possible. . In this respect, it is different from a conventional general hopper.

As shown in FIG. 1, the separation device 14 connected to the upper end of the stock tank 10 is rotatably housed in a casing into which the object S flows together with air, and has a filter wound around the outer periphery. Cage roller 16
A and a discharge roller 16 for scraping down the transferred object S attached to the outer peripheral portion of the cage roller 16A downward.
B. It is to be noted that a so-called cyclone type separator can be employed as the separation device 14, but in this system, the height dimension of the device becomes too large, so the above cage roller type condenser is preferable.

The feed means 12 includes a transfer chamber 11 connected to the lower end of the stock tank 10 and tapered downward so as to have a substantially V-shaped cross section.
An extrusion screw 30 rotatably inserted along the bottom of the transfer chamber 11;
And a drive motor 33 for rotating the zero. On the other hand, the cut-out means 13 is provided with a plurality of parallel rotors 20 each having an overhanging blade 22 on the outer peripheral surface for receiving the transported object S, and arranged side by side so as to partition the inside of the stock tank 10 in the up-down direction. In the illustrated example, a total of four pairs of rotors 18 are arranged side by side.

As shown in the enlarged view of FIG. 3, these rotor pairs 18 are formed by combining two adjacent rotors 20 in a state parallel to each other. Each rotor 20 includes a rotating core portion 21 and a projecting blade 22 that protrudes radially outward around the core portion 21, and a plurality of blades 22 are arranged at regular intervals in the circumferential direction of the rotating core portion 21. (Eight in the example shown). The rotation trajectory of the blade 22 in each rotor 20 is set such that a part of the rotation between the two rotors 20 constituting the rotor pair 18 slightly overlaps with each other.
The rotational phases of the rotors 20 and 20 are shifted from each other by about a half pitch so that the blades 22 do not interfere with each other.

The fixed-quantity transport device 1 of the present embodiment drives the arbitrary rotors 20 adjacent to each other among the plurality of rotors 20 constituting the cutout means 13 so that the opposing inner sides thereof move downward. Motor (drive means) 23
It has. As shown in FIG.
Are composed of electric motors provided on both side surfaces of the stock tank 10. These drive motors 23 are connected to the respective rotors 20 by winding transmission means such as a chain (not shown).

The drive motor 23 causes the two rotors 20, 20 constituting each rotor pair 18 to move at the same speed in the direction in which the transported object S is wound from above to below between them. It is designed to be driven to rotate. That is, both rotors 2 constituting each rotor pair 18
Of the two rotors 0 and 20, the left rotor 20 is rotated clockwise and the right rotor 20 is rotated counterclockwise. In this embodiment, a total of four rotor pairs 18
Among them, the left two rotor pairs 18 are driven by the left drive motor 23, and the right two rotor pairs 18 are driven by the right drive motor 23. The number of juxtapositions (length in the juxtaposition direction) and the axial length of each rotor 20 are set in the juxtaposed region of the rotor pairs 18 so that the inside of the stock tank 10 can be completely divided up and down. Needless to say.

Further, as shown in FIG. 3, a gap G may be provided in a range not to make the gap G too large between adjacent winding rotor pairs 18, or the rotation locus of the blade 22 may partially overlap. May be provided at regular intervals. As shown in FIG. 2, the axial direction of the extrusion screw 30 is oriented so as to intersect orthogonally with the rotation axis of each rotor 20 included in the cutout means 13 in a plan view.

With this configuration, the conveyed object S dropped by each of the winding rotor pairs 18 can be dispersed over a wide range in the axial direction of the extrusion screw 30, and conveyed by the extrusion screw 30. This has the advantage that the amount is not biased (averaged). By the way, depending on the properties of the transferred object S,
If the feed is continued only in a certain direction by the extrusion screw 30, the raw material accumulates on the upper part of the part opposite to the discharge direction of the screw 30, causing a malfunction of the level gauge or substantially reducing the storage capacity. Inconvenience occurs.

In this embodiment, as shown in FIG. 2, two discharge ports 3 are provided at both ends of the transfer chamber 11.
2A, 32B and the extrusion screw 30
Is divided into two parts 30A and 30B at the center in the axial direction. That is, the extrusion screw 30
Is composed of two screw portions 30A and 30B which are arranged in tandem uniaxially in the axial direction via the intermediate shaft coupling 31 and have screw blades which are opposite to each other. These screw portions 30A and 30B Are driven to rotate by separate motors 33A and 33B.

Therefore, by rotating one of the screw portions 30A in the normal direction and the other screw portion 30B in the reverse direction, the conveyed object S can be discharged from only one of the discharge ports 32A, and each screw portion 30A , 3
The object S can be simultaneously discharged from both of the discharge ports 32A and 32B by rotating both the OBs in the normal direction.

In this embodiment, the stock tank 1
Inspection windows 36 and 37 are provided on the upright wall 15 so that the cutting means 13 can be inspected from the outside thereof, so that the state of the transported object S in the means 13 can be checked at any time. In addition, similar inspection windows 38 and 39 are provided in the transfer chamber 11 of the feeding means 12.

According to the fixed-quantity transport apparatus 1 having the above-described configuration, the temporary storage and quantitative cut-out operation of the transported object S are performed as a series of continuous operations and in one place in the apparatus 1. be able to. Moreover, the tank 10
Since there is no tapered portion on the upper side of the inner cutout means 13, the transported object S adheres to and grows on the inner wall surface, and it is possible to prevent the occurrence of jams and bridges as much as possible. .

In this embodiment, as shown in FIG. 4 to FIG.
The stirring rotor 42 is provided above the above, and the bridging phenomenon of the transported object S is more effectively prevented by the stirring rotor 42. The stirring rotor 42 is connected to the tank 10
The rollers 2 constituting each rotor pair 18 transfer the object S in the
The motor 43 is to be dropped toward between 0 and 20.
Further, stirring blades 47 are provided at a plurality of positions in the longitudinal direction of a rotating shaft 46 rotated via the transmission means 44.

The stirring blade 47 employed in the present embodiment has an S-shaped side surface and is slightly twisted in the axial direction of the drive rotating shaft 46. Are attached to both sides of the drive rotating shaft 46 in the radial direction while turning to the front in the rotation direction. The stirring rotor 42 is provided for each of the winding rotor pairs 1.
It is provided so that there is a one-to-one correspondence for every eight.

The present invention is not limited to the above embodiment, but can be modified in various forms. For example,
In the illustrated example, the transported object S is not limited to a crushed product of the waste plastic W, and its type, degree of crushing, and the like are not limited.
Further, the standing wall 15 of the stock tank 10 does not mean that it must not be inclined at all, and the degree of the standing does not mean that it has an inclination whose main purpose is to concentrate the transferred object S. is there. Therefore, it is possible to provide a slight inclination or a step for other than this purpose.

The detailed structure of the winding rotor pair 18 (the shape of the rotor 20, the material of the blade 22, etc.) is not limited at all, and the feed means 12 may be other than the extrusion screw 30. . Further, the detailed structure of the stirring rotor 42 (the shape and the number of the stirring blades 47, etc.) is not limited at all.

[0032]

As described above, according to the present invention,
Even the conveyed object having a small bulk density can be quantitatively supplied to the feed means with a small density difference by the cut-out means in the stock tank, so that the conveyed object is fed out of the apparatus by the feed means. In this case, clogging hardly occurs, and it is possible to effectively prevent a decrease in the operating efficiency of the equipment.

Further, since a bridge phenomenon of the transferred object can be prevented from occurring above the cutting means in the stock tank by the stirring rotor, the transferred object can be reliably and continuously supplied to the feed means side. .

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a waste treatment plant when waste plastic is to be treated.

FIG. 2 is an enlarged front view showing a fixed amount transport device according to the present invention.

FIG. 3 is an enlarged front view showing a cut-out unit in the fixed amount transport device.

FIG. 4 is a front view showing an embodiment in which a stirring rotor is provided above the cutting means.

FIG. 5 is a view taken along the line AA of FIG. 4;

6 is a view taken in the direction of arrows BB in FIG. 4 (however, an intermediate portion is omitted).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed amount conveyance apparatus 2 Shredder 3 Dust collection device 10 Stock tank 12 Feeding means 13 Cut-out means 14 Separation apparatus 18 Rotor pair 20 Rotor 22 Overhang blade 23 Drive means (drive motor) 42 Stirring rotor S Conveyed object W Waste material

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Ichiro Taima 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) in Nippon Kokan Co., Ltd. 3F075 BA02 BB01 CA04 CA09 CB16 CC03 CC05 CC09 DA04 DA26 4D004 AA07 CA04 CB13 CB45 CB47 4D067 EE02 EE14 GA16 GB03 4F301 BF12 BG18 BG54

Claims (4)

[Claims] 1. A stock tank (10) for storing a transferred object (S), and an overhanging blade (2) for receiving the transferred object (S).
A plurality of parallel rotors (2) having (2) on the outer peripheral surface
0) a cutting means (13) constituted by arranging the groups side by side so as to partition the inside of the stock tank (10) in the vertical direction; and the cutting means (13) in the stock tank (10). Feed means (1) for continuously transporting the transported object (S) connected to the portion located below.
2) and a driving means (23) for rotating arbitrary adjacent rotors (20) of the plurality of rotors (20) constituting the cut-out means (13) such that the opposing inner sides thereof move downward. ) And a fixed-quantity transfer device comprising: 2. Among a plurality of rotors (20) constituting a cutting means (13), the rotor (20) is arranged above an arbitrary adjacent rotor (20) which rotates so that the inside facing each other moves downward. 20. A stirring rotor (42) for dropping a conveyed object (S) therebetween is provided.
4. The fixed quantity transport device according to 4. 3. The feed means (12) is arranged so that the conveying direction is orthogonal to the axial direction of a group of a plurality of rotors (20) constituting the cut-out means (13). 4. The fixed quantity transport device according to 4. 4. A shredder (2) for crushing waste material (W) so that it can be transported by air, and a separation device for separating a conveyed object (S) crushed by the shredder (2) and transported by air from transport air. (14), a fixed-quantity conveying device (1) for storing and quantitatively discharging the transferred object (S) separated by the separation device (14), and the transferred object (S).
Dust collector that removes dust from the air separated from it (3)
A crushed material processing facility comprising: a crushed material processing facility, wherein the quantitative transport device (1) comprises the device according to any one of claims 1 to 3.