JPS643128B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an auto strainer, and in particular, when river water, lake water, etc. is used as cooling water for equipment, dust such as leaves, grass, straw, vinyl, etc. contained in the water is removed. Regarding auto-strainer for removal.

Conventionally, this type of equipment includes a device in which a drum with pores is installed in a tank, and when the raw water flowing into the tank passes through the pores of the drum, dirt contained in the raw water is removed. .

However, the above-mentioned apparatus has the disadvantage that the pores of the drum become clogged with dust over time, resulting in a decrease in processing capacity. In addition, when the mesh becomes clogged, backwashing is performed, but grass, straw debris, etc. are intricately entangled in the mesh, so backwashing cannot completely remove them.

This invention eliminates the drawbacks of the conventional ones as described above, and provides an auto strainer that does not become clogged in the part that removes dust and can maintain the processing capacity at a predetermined level for a long time. The purpose is to

That is, the present invention achieves the above-mentioned object by installing a rotating shaft vertically in a vertical tank in which an inlet, a dust exhaust port, and an outlet are formed at intervals in the circumferential direction. A number of discs are fixed to a rotating shaft with a predetermined gap therebetween, and first and second rakes each having a number of rake plates are provided on the outlet side of the inflow port and the dust exhaust port, and the rake plate is connected to the An auto strainer is characterized in that it is loosely inserted into a gap.

Hereinafter, one embodiment shown in the drawings will be described.

The tank 1 has a vertical cylindrical shape, and has a top plate 2 and a bottom plate 3 at the top and bottom, respectively, and raw water inlets 4, which are spaced apart in the circumferential direction (120 degree angular intervals in this example). A dust outlet 5 and an outlet 6 are respectively formed. A rotating shaft 7 is vertically installed in the tank 1, and the upper and lower ends of the rotating shaft 7 are connected to the top plate 2.
and is pivotally supported by the bottom plate 3 via a bearing 8.
A motor 9 with a speed reducer is installed on the top plate 2, and the rotating shaft 7 is drivenly connected to the motor 9 at its upper end. A large number of discs 10 and disc-shaped spacers having smaller diameters are alternately fixed to the rotating shaft 7, thereby forming gaps 12 between the discs 10. The disk 10 and the spacer 11 are sandwiched between the upper and lower end plates 1 ³ , 1 ³ . The bearings are in close contact to prevent water from entering the bearing.

First and second rakes 14 and 15 are provided at the inflow port 4 and the dust exhaust port 5 on the outflow port 6 side, respectively. As shown in FIG. 2, the first rake 14 has a large number of rake plates 16 loosely inserted into the gaps 12 between the discs 10, and these rake plates 16
Closing plate 1 closing between the wall and the outer periphery of the disk 10
7, and its tip abuts on the spacer 11. The closing plate 17 is fixed to a mounting plate 18 provided on the wall of the tank 1.

As shown in FIG. 3, like the first rake 14, the second rake 15 has a number of rake plates 19 loosely inserted into the gaps 12 between the discs 10, and these rake plates 19 are connected to the end plate 20. A large number of spacers 21 are alternately arranged and fixed in between, and the tip portions are in contact with the spacers 11 between the disks 10. The end plate 20 is the dust outlet 5
It is fixed to a mounting plate 22 provided at. The space between the wall of the tank 1 and the outer periphery of the disc 10 is closed by the spacer 21 and the base of the rake plate 19 therebetween. Reference numeral 23 designates a closing plate that closes off the space between the upper and lower partition walls 13', 13' and the end plate 20, 24 and 25 designate inspection windows, 26 designates an air vent pipe mounting hole, and 27 designates a drain vent pipe mounting hole.

Next, the operation of the above will be explained.

Due to the rotation of the rotary shaft 7, the disk 10 is rotated in a clockwise direction as indicated by an arrow R in FIG. The raw water that has flowed into the tank 1 from the inlet 4 hits the blocking plate 17, the rake plate 16, and the disc 10 of the first rake 14, and is partially filtered between the disc 10 and the rake plate 16. The raw water in the portion flows in the same direction as the disc 10 rotates and reaches the second rake 15. The raw water that has reached the second rake 15 is transferred to the disk 10 and the rake plate 19.
and the gap 12 between the discs 10
The debris that is stuck in the rake plate 19 against the disc 10
The dust is forcibly scraped off by the relative movement of the dust, and is discharged from the dust exhaust port 5 by the water flow. In connection with this, a valve (not shown) is attached to the outlet flange of the dust exhaust port 5 to restrict the flow rate of dust exhaust as much as possible.

On the other hand, the filtered water that has passed between the disc 10 and the respective rake plates 16 and 19 of the first and second rakes 14 and 15 is discharged from the outlet 6 and used as water.
As described above, clean water is obtained by removing dust from raw water containing dust.

This invention is as described above, and a large number of disks are fixed to a rotating shaft installed in a tank with predetermined gaps, and the rake plates of the first and second rakes are loosely inserted into the gaps. , filtering is performed between the disc and each rake plate to obtain clean water, and the dust stuck in the gaps between the discs is constantly forcibly scraped off by the rake plate of the second rake. Therefore, the processing capacity can be maintained at a predetermined level for a long time without clogging. Furthermore, since the filtration mechanism is simply composed of a combination of plates, the structure is simple, there are few machined parts, the device can be provided at a low cost, and maintenance is easy.

[Brief explanation of drawings]

Fig. 1 is a plan sectional view of an embodiment of the present invention, Fig. 2 is a sectional view taken along the line - of Fig. 1, and Fig. 3 is a sectional view taken along the line - of Fig. 1. . 1...Tank, 4...Inflow port, 5...Dust exhaust port, 6...
... Outlet, 7... Rotating shaft, 10... Disc, 11...
...Spacer, 12...Gap, 14...First rake, 15...Second rake, 16...Rake plate, 1
9... Rake board.

Claims (1)

[Claims] 1. A rotating shaft is installed vertically in a vertical tank in which an inlet, a dust exhaust port, and an outlet are formed at intervals in the circumferential direction, and a number of discs are attached to the rotating shaft with predetermined gaps. first and second rakes each having a large number of rake plates are provided on the outlet side of the inflow port and the dust exhaust port, and the rake plates are loosely inserted into the gap. auto strainer.