JPS5939166B2 - rotating screen device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for converting various suspensions and other liquids to be treated, which are mixtures of solids and liquids, into solids and liquids in intermediate processes such as sewage treatment, pulp and paper manufacturing, or fish and meat processing. This invention relates to a drum-type rotating screen device used for separating.

The object of the present invention is to provide a rotating screen device that can separate solids and liquids extremely efficiently and continuously, and that can operate continuously for long periods of time without clogging the screen even when the solid particles are small. It is about providing.

That is, in the rotating screen device of the present invention, a large number of ring-shaped wedge wires are arranged in parallel with a predetermined gap in the axial direction, and extend along the outer circumferential side of the wedge wires in the axial direction with appropriate intervals in the circumferential direction. A drum-shaped rotating screen having slits extending circumferentially between the wedge wires is constructed by joining the outer surface of each of the wedge wires to a plurality of supporting irons arranged at The slit is rotatably suspended horizontally around the slit so that the liquid to be treated supplied from one opening passes from the inside to the outside of the slit and is filtered, and the separated solid is discharged from the other opening. A rotary brush that rotates about an axis substantially parallel to the rotation axis of the rotary screen is disposed in sliding contact with the outer peripheral side of the rotary screen, that is, on the filtrate side.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 is a base, and 2 is a drum-shaped rotating screen, with an inlet drum 3 connected to one opening and an outlet drum 4 connected to the other opening.

The rotating screen 2 has an inlet drum 3 and an outlet drum 4
A ring 5 fixed to the outer periphery of each bearing 6 is placed on the base 1.
The outlet drum 4 side is supported by a pair of trunnion wheels 7 which are pivotally supported through the base plate 1, and the outlet drum 4 side is horizontally suspended around the axis of the base 1 with the outlet drum 4 side tilted slightly downward, and furthermore, the inlet drum 3 side Pulley 8 and base 1 fixed to the outer periphery of the
A transmission belt 12 is stretched between a rotating shaft 10 of a geared motor 9 fixed to a rotary shaft 10 and a pulley 11 fixed to the rotating shaft 10, and the geared motor 9 rotates at a constant speed in the direction shown by arrow A in FIG. There is.

Reference numeral 13 denotes a supply cylinder for the liquid to be treated, which is arranged at a position offset to one side inside the inlet drum 3, and whose end projecting outward is fixed to a support 14 erected on the base 1 so that the position can be changed. The rotary screen 2 is held fixed, and a discharge port 15 provided on the side of the inner end is open and located opposite to the inner wall of the rotary screen 2 on the entrance side.

Reference numeral 16 denotes a cover for the rotating screen 2, which is fixed to the base 1, and has a bottom 17 provided with a discharge port 18 for the separated liquid.

The liquid to be treated (a mixture of solid and liquid) fed through the supply tube 13 flows into the rotating screen 2 from the outlet 15, and the liquid in the liquid to be treated passes from the inside of the rotating screen 2 to the outside. The liquid is filtered and separated, and then discharged to the outside of the machine through the discharge port 18.

On the other hand, the solids remaining in the rotating screen 2 are sequentially transferred to the exit drum 4 side and discharged from the end opening of the exit drum 4.

As shown in FIGS. 3 and 4, the rotating screen 2 has a wedge wire 20 formed into a ring shape with a wedge-shaped cross section and a wide surface 20a facing inward in the radial direction. Each of the wedges is connected to a large number of support rods 21 which are arranged in parallel with a predetermined gap e in the axial direction, and extend along the outer circumferential side of the wedges in the axial direction and are arranged radially at appropriate intervals in the circumferential direction. The wedge-shaped ends 20b of the wires 20 facing outward in the radial direction are joined by spot welding to form a drum shape, and each wedge wire 20 has a slit 22 extending in the circumferential direction with a gap e of a predetermined size. It is formed.

Therefore, the liquid in the liquid to be treated passes through the slit 22 as shown by the arrow in FIG. 4 and is separated.

Note that it is preferable to provide a spiral weir plate on the inner wall of the rotating screen 2 configured in a drum shape as described above to regulate the transfer of the liquid to be treated.

Reference numeral 23 denotes a rotating brush provided above the outer side of the rotating screen 2, and as shown in FIG. The rotary screen 2 is arranged so as to penetrate through the rotary screen 2 and protrude to the inside of the rotating screen 2.

A rotating shaft 24 of the rotating brush 23 is rotatably supported by the cover 16 via a bearing 25, and is arranged substantially parallel to the rotating shaft of the rotating screen 2.

A sprocket wheel 26 is fixed to the protruding end of the rotating shaft 24, and a chino 30 is hung between the wheel 26 and a sprocket wheel 29 fixed to the rotating shaft 28 of a geared motor 27 mounted on the base 1. The rotary brush 23 is rotated by the guard moke 27.

However, the rotating brush 23 is not connected to the rotating screen 2 as described above.
Since it is arranged in sliding contact with the rotating screen 2 and rotates with the rotation of the rotating screen 2, it is also possible to use it in a freely rotating state without forced rotation.

In addition, when the rotating brush 23 is forcibly rotated, the rotating brush 23 is rotated in a direction opposite to the direction in which the rotating screen 2 rotates.
It is also possible to rotate.

When the rotating screen 2 rotates and the rotating brush 23 is rotated in conjunction with this rotation or by forced rotation, the slits 22 of the rotating screen 2 extend in the circumferential direction, so the tips of the brushes sequentially move through the slits 22. Enter the fourth
As shown in the figure, it performs a cleaning action while protruding inward, and solid matter accumulated in the slit 22 can be completely removed, so that the slit 22 is not clogged.

In addition, since the rotating brush 23 is disposed on the outer circumferential side of the rotating screen 2, that is, on the filtrate side, solid matter and other foreign matter in the liquid to be treated rarely get entangled with the brush 23, and the rotating brush 23 always operates normally. Operate.

Moreover, since the tip of the brush that has entered the slit 22 is intermittently flipped up by the support rod 21, solid matter adhering to the rotating brush 23 is also automatically flicked away.
The slit 22 is caused by the solid matter attached to the rotating brush 23.
It does not interfere with the cleaning action of the product.

As explained above, according to the present invention, the rotating screen is configured in a drum shape by arranging a large number of ring-shaped wedge wires in parallel with a predetermined gap in the axial direction,
Since a slit extending in the circumferential direction is formed between each wedge wire, the tip of a rotating brush disposed in sliding contact with the outer circumference of the rotating screen enters the slit and protrudes inward to perform a cleaning action. None, because the slits in the rotating screen are constantly cleaned by a rotating brush, the screen will not become clogged even after long periods of continuous operation, and solids and liquids can be separated very efficiently.

In addition, since the rotating brush is placed outside the rotating screen, that is, on the filtrate side, solids and other foreign matter in the liquid to be treated are unlikely to get entangled with the brush, which has the advantage that the rotating brush always operates normally. .

Furthermore, since the rotating brush can be rotated in conjunction with the rotation of the rotating screen, it is also excellent in terms of labor saving.

Moreover, the device is relatively simple and easy to manufacture.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view of a rotating screen device according to the present invention, FIG. 2 is a right side view of the same, and FIG. 3 is a view taken along the line FIG. 4 is an enlarged cross-sectional view taken along line I-1 in FIG. 3. FIG. 2... Rotating screen, 20... Wedge wire, 21... Support rod, 22...
...Slit, 23...Rotating brush.

Claims (1)

[Claims] 1. A large number of wedge wires formed in a ring shape are arranged in parallel with a predetermined gap in the axial direction, and extend along the outer circumferential side of the wedge wires in the axial direction and are arranged at appropriate intervals in the circumferential direction. A drum-shaped rotating screen having slits extending circumferentially between the wedge wires is constructed by joining the outer surface of each of the wedge wires to a plurality of support ronds, and the rotating screen is rotated around its axis. The slit is rotatably hung horizontally, and the liquid to be treated supplied from one opening passes from the inside to the outside of the slit to be filtered, and the separated solid is discharged from the other opening, A rotating screen device further comprising a rotating brush that rotates around an axis substantially parallel to the rotation axis of the rotating screen and is disposed in sliding contact with the circumferential side of the rotating screen m, that is, on the filtrate side. 2. The wedge wire has a wedge-shaped cross section, its wide side facing radially inward, and an intermediate wedge-shaped end facing radially outward being joined to the support rond. The rotating screen device according to item 1. 3. The rotating screen device according to claim 1 or 2, further comprising a rotation drive device for forcibly rotating the rotating brush.