JP2001098531A - Dust remover equipment and operating method for dust remover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide dust remover equipment and an operating method for a dust remover which can save wasteful electric power by controlling the operation of the dust remover according to the quantity of foreign matter flowing in a channel. SOLUTION: This dust remover equipment includes a dust remover 12 installed to intersect a channel 10, water level detecting means 38a, 38b for detecting the water level on the upstream and dowrstream of the dust remover 12, and a control part 40 for controlling the operation and stop of the dust remover 12 according to a water level difference ΔH between the upstream and the downstream of the dust remover 12 based on the detected values of both water level detecting means 38a, 38b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover and a method for operating a dust remover installed in, for example, an inflow water channel to a drainage pump in order to supplement and remove dust floating in the water channel.

[0002]

2. Description of the Related Art For example, at the confluence of rivers flowing from a tributary to the main river, if the water level of the tributary becomes higher than the main river due to heavy rain or the like, the drainage gate or drainage gutter is closed. It is widely used to prevent backflow from the main river to the tributary and drain the water from the tributary to the main river using a drain pump. In this case, a dust remover or the like is installed in an inflow channel to the drain pump to protect the drain pump.

[0003] Conventionally, in a dust-removing device installed in the inflow channel to this type of drain pump, the drain pump is operated regardless of the amount of foreign matter flowing into the inflow channel to the drain pump. By operating the dust remover at the same time,
I was trying to protect the drainage pump.

[0004]

However, continuous operation of the dust remover irrespective of the amount of foreign matter flowing into the water channel as in the prior art described above is performed during the operation of the drain pump, for example. In addition, even if the amount of dust and suspended matter flowing into the water channel is reduced as a whole, the operation of the dust remover is continued, so that power is wasted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to reduce wasteful power by controlling the operation of a dust remover in accordance with the amount of foreign matter flowing into a water channel. An object of the present invention is to provide an operation method of a facility and a dust remover.

[0006]

The dust removing equipment of the present invention comprises:
A dust remover installed across the water channel, water level detecting means for detecting water levels on the upstream side and the downstream side of the dust remover, respectively, and an upstream side and a downstream side of the dust remover based on the detection values of both water level detecting means. And a controller for controlling the operation and stop of the dust remover based on the difference in water level.

Accordingly, when the drain pump is operated in a state where the operation of the dust remover is stopped, the foreign matter flowing into the water channel is caught on the screen of the dust remover, and when the operation time of the drain pump becomes longer, the foreign matter is displayed on the screen of the dust remover. Since the amount of such foreign matter also increases, the flow-down loss due to the flow of water passing through the dust remover increases, and the water level difference between the upstream side and the downstream side of the dust remover increases. Therefore, by controlling the operation and stop of the dust remover based on the water level difference, the dust remover can be operated only when actually required.

The method of operating a dust remover according to the present invention detects a water level difference between an upstream side and a downstream side of a dust remover installed crossing a water channel, and when the water level difference is equal to or larger than a predetermined set value, the dust remover is operated. Is started, and the operation of the dust remover is stopped when it is less than the set value.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an outline of a dust remover according to an embodiment of the present invention. For example, when the water level of a tributary becomes higher than that of the main river due to heavy rain or the like, a drainage gate, a drain gutter gate, and the like are closed. And the dust remover 1 intersects with an inflow water channel 10 to a drain pump (not shown) for draining tributary water into the main river.
2 are installed.

The dust remover 12 employs a so-called bar screen system, and includes a screen 16 having vertically extending plate-like members 14 arranged at equal intervals in the width direction of the water channel 10. And a plurality of rows of movable rakes 18 that constitute scraping pieces for scraping up the trash along.

The movable rake 18 is supported at both ends by a pair of left and right endless rake chains 20. The endless rake chain 20 is bridged between a driving sprocket 24 supported by a fixed frame 22 provided on the side of the water channel 10 and a driven sprocket 26 disposed at the bottom of the water channel 10. The drive sprocket 24 rotates through the drive chain 30 with the rotation of the drive sprocket 24, and travels along the rail provided on the frame of the dust remover 12 with the rotation of the drive sprocket 24.

A receiving box 32 is disposed below the drive shaft with the drive sprocket 24 engaged at both ends, and the movable rake 18 is turned over when the endless rake chain 20 runs along the drive sprocket 24. do it,
The trash and suspended matter scraped up by the movable rake 18 is configured to fall into the receiving box 32.

In the water channel 10, an upstream float 34a and an upstream water level transmitter 36a are located upstream of the dust remover 12.
Is provided downstream of the dust remover 12 and comprises a downstream float 34b and a downstream water level transmitter 36b.
Is provided. The two water level transmitters 36a,
The signal from 36b is input to the control unit 40. The control unit 40 calculates the water level difference ΔH between the upstream side and the downstream side of the dust remover 12, and sends the control signal to the motor 28. That is,
The control unit 40 calculates a water level difference ΔH between the upstream side and the downstream side of the dust remover 12 based on signals from the water level transmitters 36a and 36b. Signal is output, and motor 2
8, a stop signal is output.

If the drain pump is operated in a state where the operation of the dust remover 12 is stopped, the foreign matter flowing into the water channel 10 is applied to the screen 16 of the dust remover 12, and if the operation time of the drain pump becomes longer, the screen becomes screen. Also, the amount of foreign matter pertaining to 16 increases. Thereby, the flow-down loss due to the flow of water passing through the dust remover 12 increases, and the water level difference ΔH between the upstream side and the downstream side of the dust remover 12 increases. Therefore, by controlling the operation and stop of the dust remover 12 based on the water level difference ΔH, the dust remover 12 can be operated only when necessary.

Next, the operation of the dust remover of this embodiment will be described. For a while after the operation of the drainage pump has been started, the amount of dust and suspended matter flowing into the water channel 10 is large, but these dust and suspended matter tend to decrease with the passage of time. Therefore, at the beginning of the operation of the drain pump, shortly after the operation of the drain pump, the water level difference ΔH between the upstream side and the downstream side of the dust remover 12 rapidly increases, and when the water level difference ΔH reaches or exceeds a predetermined set value, Control unit 40
The dust remover 12 starts operating in response to a control signal from the controller.

When the operation of the drain pump is continued, large suspended matter sometimes flows. However, since the amount of dust and suspended matter flowing down is reduced as a whole, the dust remover 1 which is continuously operated.
2, the water level difference ΔH between the upstream side and the downstream side gradually decreases,
When the water level difference ΔH becomes smaller than a predetermined set value, the operation of the dust remover 12 is stopped by a control signal from the control unit 40.

If the operation of the drain pump is continued while the operation of the dust remover 12 is stopped, the suspended matter gradually accumulates on the screen 16 of the dust remover 12, and accordingly, the upstream side of the dust remover 12 The water level difference ΔH on the downstream side also gradually increases, and when the water level difference ΔH reaches a predetermined set value, the dust remover 12 starts operating again according to a control signal from the control unit 40. As described above, even during the operation of the drain pump, the dust remover 12 performs the intermittent operation according to the amount of dust and suspended matter flowing into the water channel 10.

[0018]

As described above, according to the present invention,
Even during the operation of the drain pump, the dust remover operates intermittently according to the amount of dust and suspended matter flowing into the water channel, thereby reducing power costs and shortening the noise generation time of the dust remover. can do.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an outline of a dust remover according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 water passage 12 dust remover 16 screen 18 movable rake 20 endless rake chain 24 drive sprocket 26 driven sprocket 28 motor 32 receiving box 34a, 34b float 36a, 36b water level transmitter 38a, 38b water level detecting means 40 control unit ΔH water level difference

Claims (2)

[Claims] 1. A dust remover installed crossing a water channel, water level detecting means for detecting water levels on an upstream side and a downstream side of the dust remover, respectively, and a dust remover based on detection values of both water level detecting means. A dust remover comprising: a control unit that controls the operation and stop of the dust remover based on a difference in water level between an upstream side and a downstream side. 2. The method according to claim 1, further comprising detecting a water level difference between an upstream side and a downstream side of the dust remover installed across the water channel, and starting the operation of the dust remover when the water level difference is equal to or more than a predetermined set value. The method of operating a dust remover, wherein the operation of the dust remover is stopped when the difference is less than or equal to.