JP3894227B1 - Tunnel type jet water flow screen - Google Patents

Abstract

The present invention provides a dust removal screen that can separate captured impurities without raising them above the surface of the water, transport them outside the water channel and restore the dust removal function.
A screen having a rake that can be moved up and down is arranged facing a flow including impurities. If impurities accumulate on the screen and the water flow capacity decreases, the rake is lowered to scrape the screen impurities and guide it to the groove at the front of the bottom of the screen. When the rake is lowered to the bottom, a tunnel-like space is formed around the contaminants by the groove and rake. A gate or valve is connected to one end of this tunnel-like space, and the other end is opened to open the inside of the water channel. The structure allows water to enter and exit freely. Therefore, when the gate or valve is opened, water flows in vigorously from the other end due to the water pressure, and the foreign matter is carried on the water flow and pushed out of the water channel. The dust removal function is restored when the gate or valve is closed and the rake is raised again.
[Selection] Figure 1

Description

The present invention relates to a screen for dust removal, and in particular, the contaminants are separated from the screen in the water without raising them above the surface of the water, and the separated contaminants are placed on a high-speed water stream (hereinafter referred to as a jet stream) to other places. The function as a screen can be quickly recovered.

As shown in, for example, Japanese Patent Application Laid-Open No. 8-113930, a conventional dust removing device is used to scrape up foreign substances captured by a screen with a rake and move it to another place by a belt conveyor or the like to collect it as industrial waste. I was processing.
Japanese Patent Laid-Open No. 8-113930

In the case of the conventional rake rake type, the following points are problems.

Contaminants are generally handled as industrial waste when they are raised above the surface of the water, and cannot be returned to the water again.

Therefore, in addition to the scraping device for foreign matter, peripheral equipment for moving, accumulating and managing the scraped foreign matter such as a belt conveyor is required.

Since foreign substances move in the air while wet and are temporarily placed in the accumulation area, the scenery is easily damaged and bad odor is likely to occur.

Accumulated contaminants must be managed and treated as industrial waste, resulting in a large human and economic burden.

The tunnel type jet water flow screen of the present invention has a screen body, a rake that can be moved up and down to scrape dust captured by the screen, and a drive mechanism for the rake, and can further stock the dust that the rake has scraped down. An elongated space portion is provided at the lower portion of the screen body, and at one end of the elongated space portion, a discharge port with an opening / closing device and a conduit connecting to the outside of the water channel connected thereto are provided.

Further, the tunnel type jet water flow screen of the present invention is configured such that when the screen captures impurities, and the rake scrapes the impurities and accumulates the impurities in the space portion, the rake and the slender space wall surround the impurities. The other end that does not have a spout with an opening and closing device is open to the water channel when a tunnel-like space is formed. .

The tunnel-type jet water flow screen according to the present invention is configured such that when a tunnel-like space is formed around a foreign object, a spout with an opening / closing device that is present at one end of the tunnel-like space is opened and opened in the water channel. A high-speed water flow is generated in the tunnel due to the pressure difference with the end, and the contaminants can be transported to a destination such as a downstream portion of the water channel or a contaminant collection tank through a pipe line leading to the outside of the water channel.

By separating and removing the contaminants from the screen in the water without raising them above the water surface, the contaminants are not treated as industrial waste and can be returned to the original waterway. Therefore, management and treatment as industrial waste are not necessary.

In addition, even when processing foreign matters, if the waste is installed at the transport destination by the jet water flow, the foreign matters can be collected and collected, and a large facility such as a belt conveyor becomes unnecessary.

Since foreign substances move with the water in the basement and are not noticeable and do not generate odors, there is little impact on the surrounding environment.

The entire dust removal system is simplified, and both equipment costs and maintenance costs can be reduced, and safety is high.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

The tunnel-type jet water flow screen 100 according to the embodiment includes a screen 1 in a water channel, a descent rake 3 that scrapes down impurities 2 captured by the screen 1, a rake drive motor 4, and a rake 3 at the bottom of the screen 1. Are provided with a groove 5 for stocking the impurities 2 scraped down, and a gate 6 at the end of the groove.

When dust is removed, the rake 3 is raised above the water surface. (step 1)

When removing the contaminant 2 from the screen 1, the rake 3 is lowered into the water along the screen 1, and the contaminant 2 on the screen 1 is pushed down into the groove 5 at the bottom of the screen 1 to separate it from the screen 1. A part of the rake 3 and the groove 5 form a tunnel-like space 7 around the contaminant 2. (Step 2)

When the gate 6 at the end is opened while the rake 1 is lowered, the water flows into the tunnel-like space 7 from the other end that is open to the water, and becomes a jet water flow to bring the contaminants 2 out of the water channel. The impurities 2 are washed away and are conveyed through the pipe line 8 to the impurities collecting basket 9. (Step 3)

After that, the gate 6 is closed, the rake 3 is set at the initial position, and dust removal is started again. (step 1)

By repeating the above process, the dust removal function of the tunnel type jet water flow screen 100 is maintained.

(A) is the front view which looked at the screen of this invention from the upstream, (b) is the side view in figure (a). (A) is the front view seen from the upstream at the time of operation | movement of step 1, (b) is AA sectional drawing in Fig. (A). (A) is the front view seen from the upstream at the time of operation | movement of step 2, (b) is AA sectional drawing in Fig. (A). (A) is the front view seen from the upstream at the time of operation | movement of step 3, (b) is BB sectional drawing in Fig. (A).

Explanation of symbols

W1 Waterway W2 Bottom WL Water surface 100 Tunnel-type jet water flow screen 1 Screen 2 Contaminant 3 Descent rake 4 Rake drive motor 5 Groove 6 Gate 7 Tunnel-like space 8 Pipe line 9 Containment for foreign matter

Claims (3)

Equipped with a screen body in the water channel, a rake that can be lifted and lowered to scrape impurities captured by the screen, and a drive mechanism for the rake, and a slender space at the bottom of the screen body that can store the contaminants scraped by the rake In addition, a tunnel-type jet water flow screen is provided with a spout with an opening / closing device and a pipe connecting to the outside of the water channel connected to one end of the elongated space. When the rake scrapes off the foreign matter and accumulates the foreign matter in the space, the rake and the slender space wall surround the foreign matter and form a tunnel-like space around the foreign matter. 2. The tunnel type jet water flow screen according to claim 1, wherein when the tunnel-shaped space is provided, the other end not provided with the opening / closing device is opened into the water channel. When a tunnel-like space is formed around the contaminants, the spout with an opening / closing device that is present at one end of the tunnel-like space is opened, and the pressure difference between the other end that is open in the water channel causes high speed in the tunnel. 2. The tunnel type according to claim 1, wherein the tunnel type has a function of generating a water flow and transporting impurities to a destination such as a downstream portion of the water channel or a waste collecting bin by a pipe line leading to the outside of the water channel. Jet water flow screen.

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