JPH077358Y2 - Papermaking screen device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is intended for use in the papermaking process or the wastepaper process.
The present invention relates to a papermaking screen device for a reject process, in which powdery disintegrated pieces are disaggregated from a papermaking raw material containing coarse foreign matters and the coarse foreign matters are discarded to the outside of the system.

[Conventional technology]

Generally, in papermaking equipment such as papermaking and wastepaper processing, the disintegrated fragments in the fiber suspension that is the raw material are disintegrated, and stones,
In order to remove foreign matters such as sand, metal pieces, resin pieces, etc., and other dust, a screen device with a large number of round holes or slits is used to partition the interior of the closed casing to partition the screen. It is known that the screening effect is enhanced by providing an impeller that rotates along a screen plate in a closed casing to increase the dispersibility and disintegration and the treatment capacity of the separator and also add a screen clogging prevention function. There is.

[Problems to be solved by the device]

However, in this conventional screen device, as shown in FIGS. 9 (a) and 9 (b), a screen plate is formed by engraving slits of round holes or elongated holes in a plate material in order to remove foreign matters and dust. Although the screen plate was used as a partition wall to improve the selective treatment capacity, the round hole type cannot remove fine dust, especially granular dust, and the thin slit type has a small opening area and a small amount of processing. There was a drawback that the strength of the plate was weakened. On the contrary, if the number of slits is reduced to form the screen plate, the strength is increased, but there is a contradictory disadvantage that the selective processing capacity is reduced, and it is conceivable to increase the plate thickness of the screen plate to form a large number of slits. However, cutting a thin slit into a thick plate is difficult in terms of processing, reduces production capacity and increases cost, and once the slit is formed on the screen plate, the slit width becomes There was uneconomicalness that could not be adjusted.

The present invention is intended to properly eliminate these conventional drawbacks, has a high selective treatment capacity for separating useful fibers and foreign substances, and is strong in strength against the pressure on the screen part, and easy to process. It is an object of the present invention to provide a screen device, which has a simple screen configuration and can easily adjust the slit width at the time of manufacture, at a low cost.

[Means for Solving the Problems]

The present invention is a screen 1 having a slit 6 for separating a useful fiber component and a foreign substance component of impurities from a papermaking raw material.
Deployed in a partition state that partition the chamber into a sealed casing 2, for connecting the screen device provided with rotating impeller 10 in proximity to the screen 1, a plurality of annular frame 3 _1, the annular frame 3 ₁ radially a circular frame-like support member 3 which is constructed by combining a plurality of the support frame 3 ₂ arranged in located in the separating plane, the support members each supporting frame 3 3 ₂
A plurality of concave grooves 4 are formed side by side in the radial direction from the center on one side, and a strip 5 is fitted in the concave grooves 4 in a spiral or annular shape and wound, and a slit 6 is formed between the strips 5, 5. The papermaking screen device is characterized in that

[Action]

The raw material supplied into the casing 2 through the inflow port 12 flows through the useful fibers through the slits 6 at a predetermined pitch in the screen 1 by the impeller 10 that rotates in the vicinity of the screen, and the foreign matter does not pass through the slits. Instead, they are separated and rejected. And the screen 1 has a plurality of annular frames.
3 a plurality of support frame having a plurality of concave grooves 4 are formed in _one longitudinal
3 ₂ connected to the radial direction, for forming a slit 6 between the support frame 3 ₂ of the groove 4 Nijo body 5 Mate with Article 5, 5, strip material 5
Can be firmly attached, and can be easily manufactured, has a high strength against internal and external pressures in the raw material flow direction, has a high selective treatment capacity, and can remove fine dust.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 6 in which a screen 1 having slits for separating useful fiber components and foreign matter components of impurities from a fiber suspension of a raw material for papermaking is placed in a closed casing 2. In a screen device which is arranged in a partitioned state of the room and is provided with a rotating impeller 10 close to the screen 1, a frame-shaped support member 3 is provided on the partition surface, and a predetermined pitch interval is provided on one side of the support member 3. A plurality of recessed grooves 4 are provided, and the strip 5 is fitted into the recessed grooves 4 and fixed by winding.
This is a papermaking screen device in which slits 6 are formed between strips 5, 5.

In this embodiment, the strip 5 is a steel wire having a rectangular cross section or a circular cross section, and is continuously connected in a spiral shape, for example, in a spiral shape, a spiral shape, or a ring shape to the recessed groove 4. Is a strip of spring material 5 continuous in a spiral or spiral shape
Alternatively, a plurality of ring-shaped strips 5 each having a larger diameter in order from the center to the outside are spaced apart and connected to the radial support member 3 to form a flat plate-shaped body, and adjacent strips are arranged. It is preferable to form the slits 6 between 5 and 5.

As the support member 3, a plurality of annular frame 3 _1, a plurality of support frame 3 ₂ and the combined circular frame body arranged radially connecting each annular frame used as in the first 5-6 illustrated example, The support frame is provided with the concave grooves 4 arranged in parallel in the radial direction from the center in order so as to hold the strip 5 spirally or annularly. However, the supporting member 3 is provided with the concave grooves 4. Instead, they may be directly connected by a fixing means such as welding.

The strip 5 is made of a steel material having a rectangular cross-section on the liquid inflow side and a tapered trapezoidal cross-section on the opposite side, as shown in FIG. 4, and is annularly supported at a pitch interval of 0.01 to 0.35 mm. It is considered to select and use one having a cross-sectional shape which is held on the member 3 and into which useful fibers can easily flow, and the groove 4 is also fitted with another strip 5 as a taper groove to adjust the slit width. It can also be made possible.

In any case, if the support member 3 of the strip 5 is fitted and mounted, the width of the slit 6 can be made more uniform and the shape retention of the screen 1 can be strengthened to separate useful fibers from foreign matter. Can be further improved.

In the casing 2 having the screen 1, the raw material from the separator 11 is introduced through the inflow port 12 and the rejected foreign matter is discharged through the discharge port 13 in the usage state of FIG. The fiber is discharged from the outlet port 14 and is sent to the next step by the pump 16 through the chest 15, but it is also selected and used in another system line or another form of separator.

Reference numeral 7 in the drawing denotes a buff ring bar which causes the intrusion of raw materials, and is provided in the casing 2 as necessary. Reference numeral 8 is a motor for driving the impeller, 9 is a rotating shaft, and 17 is a lid body that is openably and closably provided in the casing 2.

In the example of FIG. 8, a cobweb-shaped, that is, a polygonal ring-shaped strip 5
Is connected to a radial support member 3 with slits 6 spaced apart to form the screen 1, and has a high ability to separate useful fibers from foreign matter.

[Effect of device]

This invention is, in the screen device in which a slit is formed to separate from the fiber suspension of papermaking raw material and foreign matter content of useful fiber content and impurities, and a plurality of annular frame 3 _1, the ring-shaped frame 3 ₁
A circular frame-like support member 3 which is constructed by combining a plurality of the support frame 3 ₂ which are arranged radially connecting the provided partition surface, a plurality radially from the center to the supporting frame 3 ₂ one side of the support member 3 The grooves 5 are formed in parallel, and the strips 5 are fitted into the grooves 4 in a spiral or annular shape and wound to form slits between the strips, so that fine dust can be accurately separated. However, it is a device with a screen part that has a high disintegration ability and a high selective processing power for separating useful fibers and foreign substances, and has a screen configuration that is strong against the pressure on the screen part and easy to process. In addition, it is possible to provide a screen device that is capable of performing efficient screen work in an inexpensive state.

[Brief description of drawings]

1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I--I of FIG. 1, FIG. 3 is a front view of a screen, and FIG. 4 is FIG. 3 II. -II line enlarged sectional view, FIG. 5 is a front view of the support member, FIG. 6 is a vertical sectional view of FIG. 5 III-III line, FIG. 7 is a flow sheet in one use state, and FIG. 8 is a screen 9 is a front view of another embodiment, and FIGS. 9A and 9B are front views of a conventional screen. 1 ... Screen, 2 ... Casing, 3 ... Supporting member, 4 ...
Grooves, 5 ... Strips, 6 ... Slits, 7 ... Buff ring bar, 10 ... Impeller, 12 ... Inlet, 13 ... Discharge port, 14 ... Outlet port.

Claims (4)

[Scope of utility model registration request] 1. A screen 1 having a slit 6 for separating a useful fiber component and a foreign substance component of impurities from a papermaking raw material is arranged in a closed casing 2 in a compartmented state, and the screen 1 is provided. in the screen device having a rotating impeller 10 in close proximity to, a plurality of annular frame 3 _1, the ring-shaped frame 3 ₁ circular frame-like support member which is constructed by combining a plurality of the supporting frame 3 ₂ which are arranged radially for connecting 3 is provided on the partition surface, and each support frame 3 ₂ of the support member 3
A plurality of concave grooves 4 are formed side by side in the radial direction from the center on one side, and a strip 5 is fitted in the concave grooves 4 in a spiral or annular shape and wound, and a slit 6 is formed between the strips 5, 5. A screen device for papermaking, characterized in that 2. The papermaking screen device according to claim 1, wherein the strip body 5 is a steel wire body having a rectangular cross section or a circular cross section that can be fitted and supported in the groove 4. 3. A spiral-shaped or spiral-shaped continuous strip 5 or a ring-shaped strip 5 whose diameter gradually increases outward from the center.
Are connected to the radial support member 3 at intervals to form a flat plate-like body, and the slits 6 are provided between the adjacent strips 5, 5.
A screen characterized by being formed respectively. 4. The steel strip 5 is a steel material having a rectangular cross section on the liquid inflow side and a tapered trapezoidal cross section on the opposite side,
The screen according to claim 3, which is annularly held on the supporting member 3 at a pitch interval of 0.01 to 0.35 mm.