JP3214819U - Screen device - Google Patents

Abstract

The present invention provides a screen device that prevents a papermaking raw material from remaining on a baffle bar. A screen apparatus includes a tank for receiving a papermaking raw material, a cylindrical screen 2 that partitions the tank into a primary chamber and a secondary chamber, and a papermaking that communicates with the primary chamber of the tank and supplies the papermaking raw material to the tank. A raw material supply passage, a foreign matter discharge passage that communicates with the primary chamber and contains the foreign matter that does not pass through the screen 2, and a foreign matter discharge passage that discharges the outside of the tank to the outside of the tank. A screen device comprising a papermaking material discharge passage for discharging out of the tank and a cylindrical rotor that is rotatably provided in the primary chamber inside the screen 2 and stirs the papermaking material in the primary chamber, A baffle bar 8 is provided on the inner surface of the screen 2, and the baffle bar 8 is inclined so that the upper end portion 8A of the baffle bar 8 is closer to the lower end portion 8B of the baffle bar 8 than the rotation direction of the rotor. It is. [Selection] Figure 2

Description

    The present invention relates to a screen device, and more particularly, to a screen device that prevents a papermaking raw material from staying on a baffle bar.

There is a screen device that selects papermaking raw materials with a screen.
In this screen device, a baffle bar parallel to the axial direction of the cylindrical screen is provided on the inner surface of the cylindrical screen, and undissolved pieces in the papermaking raw material colliding with the baffle bar are disaggregated.

    However, in the above screen device, the papermaking raw material that collided with the baffle bar remains on the baffle bar, resulting in a problem that disaggregation cannot be performed satisfactorily.

    An object of the present invention is to provide a screen apparatus that prevents the papermaking raw material from staying on the baffle bar.

    The screen device according to claim 1 is a tank that receives a papermaking raw material, a cylindrical screen that divides the tank into a primary chamber and a secondary chamber, and the papermaking raw material that communicates with the primary chamber of the tank. A papermaking raw material supply passage to be supplied, a foreign matter discharge passage for discharging the papermaking raw material containing foreign matter that does not pass through the screen to the outside of the tank, and a secondary chamber, A papermaking raw material discharge passage for discharging the passed papermaking raw material to the outside of the tank, a cylindrical rotor that is rotatably provided in the primary chamber inside the screen, and stirs the papermaking raw material in the primary chamber; A baffle bar is provided on the inner surface of the screen, and the baffle bar has an upper end portion in front of the rotation direction of the rotor. Those that are inclined to approach the lower end of the baffle bars.

    According to a second aspect of the present invention, there is provided a screen device for receiving a papermaking raw material, a cylindrical screen for partitioning the tank into a primary chamber and a secondary chamber, and communicating with the primary chamber of the tank in the tank. A papermaking raw material supply passage for supplying raw materials, a foreign matter discharge passage that communicates with the primary chamber and contains the foreign matter that does not pass through the screen, and communicates with the secondary chamber, and a foreign matter discharge passage that discharges the papermaking raw material out of the tank. A paper-making raw material discharge passage for discharging the paper-making raw material that has passed through the screen to the outside of the tank, and a cylindrical shape that is rotatably provided in the primary chamber inside the screen and that stirs the paper-making raw material in the primary chamber. A screen device including a rotor, wherein a baffle bar is provided on an inner surface of the screen, and the baffle bar has a lower end of the baffle bar with respect to a rotation direction of the rotor. There are those that are inclined so as to approach the upper end portion of the baffle bars.

    The screen device according to claim 3 is the screen device according to claim 1 or 2, wherein the cylindrical screen is formed by stacking cylindrical screens, and is formed by stacking. The screen has an upper screen and a lower screen, and an upper end portion of the baffle bar of the lower screen is located on an extension line of a lower end portion of the baffle bar of the upper screen.

    According to the screen device of claim 1, since the upper end portion of the baffle bar is inclined with respect to the rotation direction of the rotor so as to approach the lower end portion of the baffle bar, the papermaking raw material colliding with the baffle bar is the baffle bar. The papermaking raw material is pushed out without staying on the baffle bar. As a result, papermaking raw materials that tend to grow on the baffle bar are easily discharged, and undissolved pieces in the papermaking raw material that collide with the baffle bar are disaggregated and returned to the upstream side of the papermaking raw material. By acting, it is possible to further improve the effect of separating foreign substances and high-quality fibers in the papermaking raw material.

    Further, according to the screen device of claim 2, since the lower end portion of the baffle bar is inclined with respect to the rotation direction of the rotor so as to approach the upper end portion of the baffle bar, the papermaking raw material colliding with the baffle bar is It is guided along the baffle bar, and the papermaking raw material is pushed out without staying on the baffle bar. As a result, papermaking raw materials that tend to grow around the baffle bar 8 are also easily discharged, and the effect of separating foreign substances and high-quality fibers in the papermaking raw materials can be further improved.

    According to the screen device of the third aspect, in addition to the effect of the idea of the first or second aspect described above, the upper end of the baffle bar of the lower screen is on the extension line of the lower end portion of the baffle bar of the upper screen. The papermaking raw material that has collided with the baffle bar is guided substantially continuously along the baffle bar of the upper screen and the baffle bar of the lower screen, and the papermaking raw material is prevented from staying on the baffle bar. In addition, when the upper end of the baffle bar is inclined with respect to the rotation direction of the rotor so as to approach the lower end of the baffle bar, undissolved pieces in the papermaking raw material that collided with the baffle bar are disaggregated. In addition, the effect of returning to the upstream side of the papermaking raw material can further improve the effect of separating foreign substances and high-quality fibers in the papermaking raw material.

FIG. 1 is a schematic view of a screen device according to an embodiment of the present invention. FIG. 2 is a schematic view of the screen of FIG. FIG. 3 is a schematic view of a screen of another embodiment different from the screen of FIG.

A screen device according to an embodiment of the present invention will be described with reference to FIGS.
A is a screen device. The screen device A includes a tank 1 that receives a papermaking raw material, a cylindrical screen 2 that partitions the tank 1 into a primary chamber 11 and a secondary chamber 12, and a primary chamber 11 that is inside the screen 2. A cylindrical rotor 6 that is rotatably provided and stirs the papermaking raw material in the primary chamber 11.

The screen 2 has, for example, a plurality of openings 21 through which a papermaking raw material passes through a cylindrical side surface.
[Opening 21 is, for example, a gap when rod-like long members are arranged in a ring shape with a gap (longitudinal gap), a round hole provided in a cylindrical side surface, a slit (for example, an elongated rectangle) The bottom portion 22 is opened and is fixed upright in the tank 1.
As shown in FIG. 2, a baffle bar 8 is provided on the inner surface of the screen 2, and the baffle bar 8 has an upper end 8 </ b> A of the baffle bar 8 with respect to the rotation direction of the rotor 6. It inclines so that it may approach from 8B.

    Further, although not shown, the paper-making rotor 6 described above is provided with a stirring member (not shown) so as to protrude from the side surfaces excluding both end faces of the rotor 6.

3 is a papermaking raw material supply passage that communicates with the primary chamber 11 of the tank 1 and supplies the papermaking raw material to the tank 1.
4 is a foreign matter discharge passage that communicates with the primary chamber 11 and discharges a papermaking raw material containing foreign matter that does not pass through the screen 2 to the outside of the tank 1. 5 is a papermaking passage that communicates with the secondary chamber 12 and passes through the screen 2. This is a papermaking raw material discharge passage for discharging the raw material out of the tank 1. The papermaking rotor 6 rotates from a motor (not shown) via a power transmission member 7 (for example, a belt).

    Accordingly, the papermaking raw material is supplied into the primary chamber 11 through the papermaking raw material supply passage 3. The papermaking raw material in the primary chamber 11 is stirred by the cylindrical rotor 6, and the papermaking raw material that has collided with the baffle bar 8 is guided along the inclined baffle bar 8, and the papermaking raw material is pushed onto the baffle bar 8 without remaining. It will be. As a result, the papermaking raw material that easily grows around the baffle bar 8 is easily discharged, and undissolved pieces in the papermaking raw material that collide with the baffle bar 8 are dissociated and returned to the upstream side of the papermaking raw material. By acting as described above, it is possible to further improve the effect of separating foreign substances and high-quality fibers in the papermaking raw material.

As a result, the papermaking raw material selected by the screen 2 with a high selection efficiency is discharged out of the tank 1 through the papermaking raw material discharge passage 5, and the papermaking raw material containing foreign matters that cannot pass through the screen 2 is discharged as foreign matters. It will be discharged out of the tank 1 through the passage 4.
In addition, the papermaking raw material rotates the stirring member (not shown) with the rotation of the papermaking rotor 6 and generates pressure on the screen 2 at the front part of the stirring member (not shown). At the rear of the screen 2, a negative pressure is generated on the screen 2, and the screen 2 is screened to select the papermaking raw material.

    The cylindrical screen 2 described above is formed by stacking cylindrical screens as shown in FIG. 2, for example, and the screen 2 formed by stacking the upper screen 21 and the lower screen is formed. The upper end portion 8A of the baffle bar 8 of the lower screen 21 ′ is positioned on the extended line of the lower end portion 8B of the baffle bar 8 of the upper screen 21.

    As a result, the papermaking raw material that has collided with the baffle bar 8 is guided substantially continuously along the baffle bar 8 of the upper screen 21 and the baffle bar 8 of the lower screen 21 ′ to prevent the papermaking raw material from remaining on the baffle bar 8. In addition, the undissolved pieces in the papermaking raw material that have collided with the baffle bar 8 are disaggregated and act so as to be returned to the upstream side of the papermaking raw material. It can be improved further.

    In the above-described embodiment, the baffle bar 8 is inclined so that the upper end portion 8A of the baffle bar 8 is closer to the lower end portion 8B of the baffle bar 8 with respect to the rotation direction of the rotor 6. However, the present invention is not limited to this, and the rotation direction X of the rotor 6 shown in FIG. 2 may be opposite to the rotation direction Y (see FIG. 3).

    That is, the lower end portion 8A of the baffle bar 8 is inclined so as to be closer to the upper end portion 8B of the baffle bar 8 with respect to the rotational direction Y of the rotor 6 (the direction Y opposite to the rotational direction X of the rotor 6 shown in FIG. 2). To do.

   Even in this screen apparatus, the papermaking raw material is supplied into the primary chamber 11 through the papermaking raw material supply passage 3. The papermaking raw material in the primary chamber 11 is stirred by the cylindrical rotor 6, and the papermaking raw material that has collided with the baffle bar 8 is guided along the inclined baffle bar 8, and the papermaking raw material is pushed onto the baffle bar 8 without remaining. It will be. As a result, papermaking raw materials that tend to grow around the baffle bar 8 are also easily discharged, and the effect of separating foreign substances and high-quality fibers in the papermaking raw materials can be further improved.

A Screen device 1 Tank 11 Primary chamber 12 Secondary chamber 2 Screen 3 Papermaking raw material supply passage 4 Foreign matter discharge passage 5 Papermaking raw material discharge passage 6 Cylindrical rotor 8 Baffle bar 8A Upper end 8B Lower end

Claims (3)

A tank for receiving papermaking raw materials,
A cylindrical screen that partitions the tank into a primary chamber and a secondary chamber;
A papermaking raw material supply passage that communicates with the primary chamber of the tank and supplies the papermaking raw material to the tank;
A foreign matter discharge passage that communicates with the primary chamber and discharges the papermaking raw material containing foreign matter that does not pass through the screen to the outside of the tank;
A papermaking material discharge passage that communicates with the secondary chamber and discharges the papermaking material that has passed through the screen to the outside of the tank;
A screen device provided with a cylindrical rotor that is rotatably provided in the primary chamber inside the screen and stirs the papermaking raw material in the primary chamber,
A baffle bar is provided on an inner surface of the screen, and the baffle bar is inclined so that an upper end portion of the baffle bar is closer to a lower end portion of the baffle bar with respect to a rotation direction of the rotor. Screen device to play. A tank for receiving papermaking raw materials,
A cylindrical screen that partitions the tank into a primary chamber and a secondary chamber;
A papermaking raw material supply passage that communicates with the primary chamber of the tank and supplies the papermaking raw material to the tank;
A foreign matter discharge passage that communicates with the primary chamber and discharges the papermaking raw material containing foreign matter that does not pass through the screen to the outside of the tank;
A papermaking material discharge passage that communicates with the secondary chamber and discharges the papermaking material that has passed through the screen to the outside of the tank;
A screen device provided with a cylindrical rotor that is rotatably provided in the primary chamber inside the screen and stirs the papermaking raw material in the primary chamber,
A baffle bar is provided on the inner surface of the screen, and the baffle bar is inclined so that the lower end portion of the baffle bar is closer to the upper end portion of the baffle bar than the rotation direction of the rotor. Screen device to play. The cylindrical screen is formed by stacking cylindrical screens,
The screen formed by laminating has an upper screen and a lower screen,
The screen apparatus according to claim 1, wherein an upper end portion of the baffle bar of the lower screen is located on an extension line of a lower end portion of the baffle bar of the upper screen.

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