JPH11229286A - Screening machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screening machine that can increase cleaning efficiency. SOLUTION: In this screening machine, raw materials for making paper are stirred with a stirring member 10 in a tank 2 and cleaned through a screen 3. In this case, the stirring member 10 comprises almost circular disk 10a and a plurality of foil members 10b extending from a side of the back face of the almost circular disk 10a to the back face of the disk 10a and arranged annularly. The foil members 10b extending to the back face of the disk 10a is divided on the way, one edge sides of the plurality of foil members 10b are fixed to one ring 10c by welding and the other edge sides of the plurality of foil members 10b are fixed to the other ring 10d by welding and the one ring 10c and the other ring 10d are linked and held by fixing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a screen device, and more particularly, to a screen device.
The present invention relates to a screen device in which a stirring member for stirring a papermaking raw material in a tank is improved.

[0002]

2. Description of the Related Art Conventionally, in a screen device, a papermaking raw material received in a tank is agitated by a stirring member, and foreign matter in the papermaking raw material is removed through a screen to carefully select the papermaking raw material. The agitating member includes, for example, a substantially circular plate, and a plurality of foil members (blades) that extend from the back surface side of the substantially circular plate to the back surface of the plate and are arranged in a ring. This foil member is long, and its end and middle are fixed to another member by welding.

[0003]

However, in the agitating member described above, since the foil member is deformed due to distortion due to welding, if the foil member is long, the influence thereof becomes large, and the foil member and the screen are hardly affected. However, there is a problem that the intervals between the screens cannot be made uniform, and the screening efficiency by the screen decreases.

[0004] It is an object of the present invention to provide a screen device having an improved stirring member to eliminate the above-mentioned problems.

[0005]

Means for Solving the Problems To achieve the above object, a screen device according to the present invention is a screen device in which a papermaking raw material in a tank is agitated by a stirring member, and selected through a screen. A substantially circular plate, a plurality of foil members extending from the back surface side of the substantially circular plate to the back surface of the plate and arranged in a ring, and the foil member extending to the back surface of the plate is One end of one of the plurality of divided foil members is welded and fixed to one ring, and the other end of the plurality of divided foil members is welded to the other ring. The one ring and the other ring are connected and held by fixing means.

Further, the screen device of the present invention is a screen device in which a papermaking raw material in a tank is stirred by a stirring member and selected through a screen, wherein the stirring member includes a substantially circular plate, a first ring, A second ring is provided facing the
A single body formed by arranging a plurality of foil members each having one end welded to the first ring and the other end welded to the second ring, wherein the first ring and the second A plurality of the single bodies are connected side by side so that one of the rings faces each other and abuts against each other, and the second one of the single bodies located at one end of the plurality of the single bodies is arranged. An opening of one of the first and second rings located at an end of the second ring is covered with the substantially circular plate.

Further, the screen device according to the present invention is a screen device in which a papermaking raw material in a tank is agitated by a stirring member and selected through a screen, wherein the stirring member comprises a substantially circular plate, a first ring, A second ring is provided facing the
A single body formed by arranging a plurality of foil members each having one end welded to the first ring and the other end welded to the second ring, wherein the first ring and the second A plurality of the single bodies are connected side by side so that one of the rings faces each other and abuts against each other, and the second one of the single bodies located at one end of the plurality of the single bodies is arranged. A ring, an opening of one of the rings located at an end of the second ring, covered by the substantially circular plate, and the unit located at the other end of the plurality of units arranged in parallel The first ring and the second ring do not have one ring located at an end of the second ring.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A screen device according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a screen device, and the screen device 1 removes foreign substances such as plastics contained in papermaking raw materials (papermaking raw materials are, for example, disintegrated newspaper paper, corrugated cardboard paper, etc.), and is carefully selected. More specifically, a so-called inward-type screen device (a centripetal type in which a stirring member 10 described below rotates outside the screen 3 described later) in which papermaking raw material flows in from the outside of the screen toward the inside and is carefully selected. ).

This screen device 1 has a tank 2 for receiving papermaking raw materials. The tank 2 is separated from the first chamber 4 and the second chamber 4 by a screen 3 for separating foreign matter in the papermaking raw material.
Is divided into rooms 5. The screen 3 has, for example, a substantially cylindrical shape, and has an upper surface closed, a lower surface opened, and a round hole or a slit-shaped opening on the side surface.

Reference numeral 7 denotes a supply passage. The supply passage 7 supplies a papermaking raw material to the tank 2 and has a supply port 7 a located above the tank 2. A stirring member 10 is provided between the inner wall of the tank 2 and the screen 3. The stirring member 10 stirs the papermaking raw material in the first chamber 4 and is located in front of the foil member (blades) 10 b of the stirring member 10. In the section, pressure is applied to the screen 3, and in the rear of the foil member (vanes), a negative pressure is generated, thereby performing a screen washing operation for removing papermaking raw materials clogged in the screen 3.

The stirring member 10 is rotated by a motor (not shown) via a belt 11 and a rotating shaft 12.

The stirring member 10 extends from the back side of the substantially circular plate 10a to the back surface of the plate 10a.
A plurality of foil members 10b arranged in a ring,
Foil member 10b extending substantially perpendicular to the back surface of plate 10a
Is split halfway. The foil member 10b is a plate
As shown in FIG. 2, the term "extend with respect to the back surface of the plate 10a" means that even if the foil member 10b does not directly (integrally) extend from the back surface of the plate 10a,
This is a meaning including a case where it is configured to extend indirectly through 10d.

[0013] Then, as shown in a divided portion A of FIG.
One end of one of the plurality of divided foil members 10b is welded and fixed to one ring 10c, and the other end of the other of the plurality of divided foil members 10b is connected to the other ring 10d.
It is fixed by welding.

One ring 10c and the other ring 10d are fixed to each other by, for example, a female screw k1 provided on the ring 10c.
Is connected and held by a bolt K2 screwed into the female screw k1.

The foil members 10b can be successively added, and as shown in a divided portion B of FIG. 3, the end portions of one of the plurality of divided foil members 10b are welded and fixed to one ring 10c. The ends of the other plurality of divided foil members 10b are welded and fixed to the other ring 10d.

One ring 10c and the other ring 10d are fixed to each other by, for example, a female screw k1 provided on the ring 10c.
Is connected and held by a bolt K2 screwed into the female screw k1.

In other words, if the expression of the stirring member 10 described above is changed, the stirring member 10 includes a substantially circular plate 10a and a first ring 10a.
A plurality of foil members 10b, each having one end welded to the first ring 10d and the other end welded to the second ring 10c, are arranged in a ring shape. (See FIG. 6).

As shown in FIGS. 2 and 3, the single ring T is formed such that one of the first ring 10d and the second ring 10c of the single ring T faces and abuts each other.
Are connected side by side (connection is performed by a fixing means, for example, a female screw k1 provided on the ring 10c and a bolt K2 screwed to the female screw k1), and a plurality of single bodies T (this embodiment) are provided. In the example, three rings) one ring (the present embodiment) located at one end of the first ring 10d and the second ring 10c of the single body T located at one end of the single body T arranged side by side In other words, the opening of the ring (first ring 10d) indicated by the symbol Z in FIG. 2 is covered with a substantially circular plate 10a.

In particular, as shown in FIGS. 7 and 8,
If necessary, the second ring on the end side of the unitary body T ′ located on the other end side of the plurality of unitary bodies T arranged side by side may be omitted. In such a case, FIGS. As shown, an intermediate ring fixed by welding in the middle of the foil member 10b
10e may be provided, or the foil member 10b may be divided and divided (intermittently configured) in the middle, so that, as shown in FIG. Depending on the mixing state or the like, the lower end of the foil member 10b provided halfway is attached so as to advance in the rotational direction from the upper end, and the papermaking raw material is guided to the upstream side of the papermaking raw material flow, and the good fibers in the papermaking raw material are guided to the screen 3. In some cases, as shown in FIG. 8, the lower end of the foil member 10 b provided halfway is retracted in the rotation direction from the upper end depending on the type of papermaking raw material, the state of mixing of foreign matter, and the like. Attach and guide the papermaking raw material downstream of the papermaking raw material flow,
The foreign matter contained in the papermaking raw material can be guided to the foreign matter discharge passage.

The "single body T" referred to in the present invention means that a first ring 10d and a second ring 10c are provided to face each other, one end of which is the first ring 10d and the other end of which is the second ring 10c. A plurality of foil members 10b welded to each other are arranged in a ring shape. For example, as shown in FIGS. 7 and 8, a single body T in which the mounting angles of the stacked and intermediate foil members 10b are different from each other. Even if there is, a first ring 10d and a second ring 10c are provided to face each other, and one end of the first ring 10d is
If a plurality of foil members 10b each having the other end welded to the second ring 10c are arranged in a ring shape, this corresponds to the "single body T" of the present invention.

Reference numeral 20 denotes a selected papermaking raw material discharge passage. The selected papermaking raw material discharge passage 20 communicates with the second chamber 5 and guides the selected papermaking raw material to the outside of the tank 2 through the screen 3. .

Reference numeral 30 denotes a foreign matter discharge passage.
The foreign matter in the papermaking raw material that communicates with the first chamber 4 and does not pass through the screen 3 is guided to the outside of the tank 2.

Accordingly, the papermaking raw material is supplied to the tank 2 through the supply passage 7, and the papermaking raw material in the first chamber 4 is stirred by the stirring member 10. Foreign matter, such as plastic, contained in the papermaking raw material cannot pass through the screen 3, and the foreign matter discharge passage.
The papermaking raw material guided to the outside of the tank 2 through the screen 30 and passed through the screen 3 is passed through the selected papermaking material discharge passage 20 to the tank 2.
It is led outside.

According to the screen device 1 of this embodiment, a foil member extending substantially perpendicularly to the back surface of a substantially circular plate is divided and divided in the middle, instead of a single long foil member. In other words, since the foil member 10b is formed discontinuously, the influence of welding distortion can be reduced. As a result, the distance between the foil member 10b and the screen 3 can be made more uniform, and the screen 3 can improve the selection efficiency.

[0025]

According to the screen device of the first aspect, the foil member extending substantially perpendicularly to the back surface of the substantially circular plate is divided in the middle instead of being formed as one long foil member as in the prior art. In this case, the influence of welding distortion can be reduced, and as a result, the distance between the foil member and the screen can be made more uniform, and the screening efficiency by the screen can be improved.

Further, since the foil member can be divided and divided in the middle, the lower end of the foil member provided in the middle advances in the rotational direction from the upper end depending on the kind of papermaking raw material, the state of foreign matter mixing, and the like. So that
The papermaking raw material can be guided to the upstream side of the flow of the papermaking raw material so that good fibers in the papermaking raw material can be guided to the screen. The lower end of the formed foil member is attached so as to retreat in the rotational direction from the upper end, and the papermaking raw material can be guided downstream of the flow of the papermaking raw material, so that foreign substances contained in the papermaking raw material can be guided to the foreign substance discharge passage.

According to the second aspect of the present invention, the first ring and the second ring are provided to face each other, and one end is welded to the first ring and the other end is welded to the second ring. A plurality of foil members are arranged in a ring shape and a plurality of single bodies are arranged side by side and connected to form a single long foil member, instead of a conventional long foil member, to divide and divide the foil member halfway. In addition, the influence of welding distortion can be reduced, and as a result, the distance between the foil member and the screen can be made more uniform, and the screening efficiency by the screen can be improved.

Further, since the foil member can be divided and divided in the middle, the lower end of the foil member provided in the middle advances in the rotational direction from the upper end depending on the kind of papermaking raw material, the state of foreign matter mixing, and the like. So that
The papermaking raw material can be guided to the upstream side of the flow of the papermaking raw material so that good fibers in the papermaking raw material can be guided to the screen. The lower end of the formed foil member is attached so as to retreat in the rotational direction from the upper end, and the papermaking raw material can be guided downstream of the flow of the papermaking raw material, so that foreign substances contained in the papermaking raw material can be guided to the foreign substance discharge passage.

According to the screen device of the third aspect, the first ring and the second ring are provided to face each other, and one end is welded to the first ring and the other end is welded to the second ring. A plurality of foil members are arranged in a ring shape and a plurality of single bodies are arranged side by side and connected to form a single long foil member, instead of a conventional long foil member, to divide and divide the foil member halfway. In addition, the influence of welding distortion can be reduced, and as a result, the distance between the foil member and the screen can be made more uniform, and the screening efficiency by the screen can be improved.

Further, since the foil member can be divided and divided in the middle, the lower end of the foil member provided in the middle advances in the rotation direction from the upper end depending on the kind of papermaking raw material, the state of foreign matter mixing, and the like. So that
The papermaking raw material can be guided to the upstream side of the flow of the papermaking raw material so that good fibers in the papermaking raw material can be guided to the screen. The lower end of the formed foil member is attached so as to retreat in the rotational direction from the upper end, and the papermaking raw material can be guided downstream of the flow of the papermaking raw material, so that foreign substances contained in the papermaking raw material can be guided to the foreign substance discharge passage.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view of a screen device according to an embodiment of the present invention.

FIG. 2 is a schematic partial side sectional view of the stirring member of FIG. 1;

FIG. 3 is a schematic partial side sectional exploded view showing the agitating member of FIG. 1 in an exploded manner.

FIG. 4 is a schematic cross-sectional view of the screen device taken along line XX of FIG. 2;

FIG. 5 is a schematic sectional view of the screen device taken along line YY of FIG. 4;

FIG. 6 is a schematic perspective view of a single unit constituting a part of the stirring member of FIG. 1;

FIG. 7 is a schematic partial side sectional view of another embodiment different from the stirring member of FIG. 1;

FIG. 8 is a schematic partial sectional side view of another embodiment different from the stirring member of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screen device 10 Stirring member 10a Substantially circular plate 10b Foil member 10c One ring 10d The other ring 30 Foreign matter discharge passage

Claims (3)

[Claims] 1. A screen device in which a papermaking raw material in a tank is stirred by a stirring member and selected through a screen, wherein the stirring member comprises: a substantially circular plate; A plurality of foil members extending to the back surface and arranged in an annular shape, wherein the foil member extending to the back surface of the plate is divided in the middle, and an end portion of one of the plurality of divided foil members The other side is welded and fixed to one ring, the end side of the other of the plurality of foil members is welded and fixed to the other ring, and the one ring and the other ring are fixed. A screen device which is connected and held by means. 2. A screen device in which a papermaking raw material in a tank is stirred by a stirring member and selected through a screen, wherein the stirring member opposes a substantially circular plate, a first ring and a second ring. A single body in which a plurality of foil members each having one end welded to the first ring and the other end welded to the second ring, respectively, are arranged in a plurality of rings, A plurality of the single bodies are connected side by side so that one of the second rings faces and abuts on each other, and the single body is located at one end of the plurality of the single bodies. The screen device, wherein an opening of one of the rings located at an end of the first ring and the second ring is covered with the substantially circular plate. 3. A screen device in which a papermaking raw material in a tank is stirred by a stirring member and selected through a screen, wherein the stirring member opposes a substantially circular plate, a first ring and a second ring. A single body in which a plurality of foil members each having one end welded to the first ring and the other end welded to the second ring, respectively, are arranged in a plurality of rings, A plurality of the single bodies are connected side by side so that one of the second rings faces and abuts on each other, and the single body is located at one end of the plurality of the single bodies. The opening of one of the rings located at the end of the first ring and the second ring is covered with the substantially circular plate, and the opening is located at the other end of the plurality of united bodies. One of the first ring and the second ring of the unitary body Screen device, characterized in that does not include one of the ring located on the section.