JPH02107307A - Impurity treating apparatus of screen type - Google Patents

Abstract

PURPOSE:To permit dust collecting operation to be carried out without being influenced by a substantial variation in the water level of a waterway by providing a drum screen movable upward and downward according to the water level of the water to be treated and a bar screen rotatably connected near the lower end of the opening of the drum screen by a hinge. CONSTITUTION:The end of a bar screen 26 is rotatably connected to the lower end of a drum screen 12 by a hinge 28. The impurities upstream a waterway flows into the drum screen 12 and the water to be treated downstream the same flows into the bar screen 26. At this time, the impurities caught by the bar screen 26, when the amount of the water returns to the original one to move downward the drum screen 12, are separated and moved away from the bar screen 26 entering into the opening of the downstream drum screen 12, from which they are raised up. In the case of the waterway at a higher water level, the drum screen is relocated upstream the waterway and the impurities are caught downstream by the bar screen and, when the waterway returns to the normal position, the impurities caught and held by the bar screen are entered in the drum screen to be raised up.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a screen-type foreign matter treatment device, and specifically to a screen-type foreign matter treatment device that combines a drum screen and a bar screen.

[Prior Art] Conventionally, there is a rotary rake type automatic dust remover as one of the foreign matter processing apparatuses having a drum screen.

When this device is placed in the waterway of the water to be treated, the water to be treated will be
It enters through a circular opening and passes through a slit in the screen. At this time, contaminants are caught on the upstream surface of the screen, so these contaminants are constantly removed by a contaminant removal device and carried out from within the screen by a conveying device, thereby removing dust from the water to be treated.

Such a contaminant treatment device is arranged so that the lower end of the opening touches the bottom of the waterway, and the size of the opening is determined according to the normal flow rate of the water to be treated.

[Problems to be Solved by the Invention] However, the water level of a waterway may rise significantly due to rainfall or the like. At this time, if the water level in the screen was higher than the conveyance device, there was a problem in that the scraped contaminants did not enter the conveyance device and returned to the water to be treated.

Providing a drum screen large enough to absorb large fluctuations in water level in order to solve this problem would increase the size of the entire device and impose a heavy economic burden. Furthermore, in a waterway where the depth is large relative to the width of the waterway, the size of the opening is limited by the width of the waterway, so the drum screen cannot be made large enough to absorb large fluctuations in water level.

[Object of the Invention] An object of the present invention is to provide a screen-type foreign matter treatment device whose dust removal effect is not affected even if the water level of a waterway fluctuates significantly.

[Means for Solving the Problems] In order to achieve the above object, the screen type contaminant treatment device of the present invention includes a drum screen having openings into which the water to be treated flows in to remove contaminants from the water to be treated. and a bar screen rotatably connected via a hinge near the lower end of the opening of the drum screen, and a lifting device that moves the drum screen up and down according to the water level of the water to be treated in the waterway, The opening of the drum screen can be moved up and down according to the water level of the water to be treated in the waterway.

[Function] In the foreign matter treatment device having the screen configured as described above, when the water level of the water to be treated in the waterway rises above a certain level, the opening of the drum screen opens to the top of the water to be treated in the waterway. It moves to remove dust, and a bar screen captures contaminants at the bottom of the water to be treated in the waterway. Then, when the water level of the water to be treated in the waterway falls, the opening of the drum screen is lowered to completely remove dust from the water to be treated in the waterway.

[Example] An example will be described with reference to the drawings. A rotary rake type automatic dust remover 1 used as a screen type foreign matter processing device is shown disposed in a part of a waterway. The automatic dust remover 1 is a rotary drive type laser.
O and cylinder jacket shaped drum screen 1
It has 2.

Since the drum screen 12 is composed of a large number of annular plate members that are stationary and arranged to form an annular slit, when the water to be treated passes through the rotary rake type automatic atom removal machine 1, foreign substances are removed from the drum. A conveying device 14 extends from the inside of the drum screen 12 to a dumping position 16, where the sludge (contaminants that cannot be removed from the water to be treated) is captured by the screen 12 and scraped up by the rotary rake 10. is conveyed from the drum screen 12 to the dumping position 16 and compressed and dewatered. The compressed and dehydrated water is drained into the waterway through the drain pipe 18.

The rake 10 and the conveyance device 14 are rotationally driven by a drive device 20.

The transport device 14 is rotatably supported by a support pedestal 22 and a lifting device 24 via a hinge. Therefore, with this lifting device 24, the opening 12a of the drum screen 12 is
will move up and down.

In FIGS. 1 and 2, the rotary rake type automatic aerosol remover 1 is arranged at an angle so that the opening 12a is placed at the bottom of the waterway at a normal water level, and the water to be treated containing foreign substances is disposed in the waterway. is an opening 12a in the drum screen 12 as shown by arrow A.
The water enters from the drum screen 12 and flows downstream as shown by arrow B.

A bar screen 26 is placed on the upstream side adjacent to the opening 12a of the drum screen 12, and one end of the bar screen 26 is rotatably connected to the lower end of the drum screen 12 via a bar screen hinge 28. A roller 30 is provided at the other end of the bar screen 26.

A water level gauge 32 is located near the bar screen 26. In FIG. 1, the water level gauge 32 detects that the water level 34 is normal, ie relatively low, and the lifting device 24 lowers the lower end of the drum screen 12 until it touches the bottom of the waterway. . Therefore, the bar screen 26 lies at the bottom of the waterway and does not perform any dust removal function.

In FIGS. 3 and 4, the water level gauge 32 detects that the water level 34 is higher than a predetermined water level, and the lifting device 2
4 shows the drum screen 12 being lifted up.

When the drum screen 12 is lifted up, one end of the bar screen 26, which is rotatably contacted by the bar screen hinge 28, is lifted up. Accordingly, the bar screen 26 obliquely obstructs the lower half of the waterway. As the bar screen 26 changes its attitude diagonally, the other end of the bar screen 26 is dragged along the bottom of the waterway toward the drum screen 12, but the roller 30 facilitates the movement of the other end of the bar screen 26.

In addition, by providing a rail for the roller 30 on the bottom of the waterway, the movement of the other end of the bar screen 26 can be further facilitated.

In the positions shown in Figures 3 and 4, at the top of the waterway, the water to be treated containing impurities flows through the drum screen 1 as shown by arrow A.
2, exits the drum screen 12 as shown by arrow B, and flows downstream, whereas in the lower part of the waterway, the water to be treated enters the bar screen 26 as shown by arrow C and exits the bar screen 26 as shown by arrow C. and flows downstream.

At this time, the foreign substances captured on the bar screen 26 cannot be automatically scraped up as they are.

However, when the amount of water to be treated returns to its original level and the drum screen 12 is lowered again as shown in FIG. It separates and enters the opening of the drum screen 12 on the downstream side to be scraped up.

In FIG. 3, a state in which the drum screen 12 is completely removed from the waterway for maintenance inspection is shown by phantom lines. Even at this time, bar screen 2
6 completely blocks the waterway, so that the water to be treated in the waterway can be removed from dust.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

(1) Efficient dust removal can be achieved by arranging the drum screen at an appropriate position according to water level fluctuations in the waterway.

(2) When the water level of the waterway is high, a drum screen is placed at the top of the waterway, and a bar screen is used at the bottom of the waterway to trap foreign matter.When the waterway returns to its normal position, the foreign matter captured on the bar screen is removed. Materials can be put into the drum screen and raked.

(3) At the time of inspection, dust can be removed using a bar screen instead of a drum screen raised above the water, so there is no need to close the waterway and drain water just for inspection.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of a contaminant treatment device employing the present invention, showing the contaminant treatment device in a lower position. FIG. 2 is a left side view corresponding to FIG. 1. FIG. 3 is a front view showing the contaminant treatment device of FIG. 1 in an upper position. FIG. 4 is a left side view corresponding to FIG. 2. (Margins below this page) 1 ・ 10 ・ 12 ・ 12a ・ 14 ・ 16 ・ 18 ・ 20 ・ 22 ・ 24 ・ 26 ・ 28 ・ 30 ・ 32 ・ 34 ・ ・Rotating rake type automatic removal machine, ・Rotating rake, ・Drum screen, ・Opening, ・Transport device, ・Dumping port, ・Drain pipe, ・Drive device, ・Support frame, ・Unloading device, ・Bar screen, ・Bar screen hinge, ・Roller, ・Water level gauge, ・Water level,

Claims (1)

[Claims] A drum screen having an opening through which the water to be treated flows in to remove impurities; a bar screen rotatably connected via a hinge near the lower end of the opening of the drum screen; A screen-type foreign matter processing device that has a lifting device that moves a drum screen up and down.