JPH0344315Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a scum skimmer that automatically removes scum generated in a sedimentation tank.

Conventional technology and its problems Conventionally, scum generated in a sedimentation tank is collected by a flight of a sludge scraper driven by a drive device on the upper upstream side of the tank, and the scum skimmer is rotated by this flight to remove the scum. A method for removing it is disclosed, for example, in Japanese Utility Model Application Publication No. 58-190406. However, the chain to which the flight that rotates the scum skimmer is attached is on the slack side (return side) of the chain, which tends to sag, and on top of that, the resistance of the flight acting on the lever is added, increasing the sag of the chain. As a result, the engagement between the drive sprocket wheel that drives the chain of the return side flight and the chain becomes poor.
There is a risk of the chain slipping and causing the flight to go diagonally or breaking the chain.

Solution to the problem This invention uses a flight attached to the chain of a chain conveyor that moves on the water surface to scrape up floating scum, and uses the movement of the flight to open and close the downstream scum skimmer to collect the scum. In the sludge scraper, a lever extending from the scum skimmer contacts an operating piece protruding from a flight at the bottom of the pond, and the scum is collected by rotation of the lever.The lever is attached to the load side of the chain. By acting,
This is an attempt to solve chain problems.

Embodiments Hereinafter, the present invention will be explained based on drawings of embodiments.

In the figure, 1 is a settling tank, 2 is a sludge scraper installed in the longitudinal direction of this settling tank or in any direction, and this sludge scraper 2 is a sprocket wheel 21.
A large number of flights 23 on a chain 22 stretched over
are arranged at regular or arbitrary intervals, and by driving this chain, the flights 23 for the sludge scraping machine scrape up the scum floating on the water surface towards the pond end side and other scum removal equipment sides. During this scum scraping, the flight is in the floating position. Of the total number of flights 23, one or more of them is provided with an actuating piece 3 protrudingly provided. The actuating piece 3 is attached to the flight approximately at the center in the length direction of the flight so as to protrude from the height of the flight when the flight moves on the bottom of the pond.

Next, the flights 23 at the bottom of the pond are moved along the rails buried in the bottom of the pond, and the settled sludge is scooped up into the sludge hopper. In this case, the chain 22 gathers up the sludge in the flight 23, so it is loaded and becomes under tension.

In addition, sedimentation pond 1 in front where a scum skimmer was installed
A lever 4 is disposed at. One end of the lever 4 is in contact with an actuating piece 3 provided on a flight that moves on the pond bottom, and its middle part is swingably provided via a bearing on a shaft 6 protruding from the pond side wall or fixed side above the water surface. . In this embodiment, as shown in Fig. 2, the underwater part of the lever 4 is approximately Y.
It is shaped like a letter. Further, bushing rods 8, 8 are provided at the other end of the lever 4 via a shaft 7.

Next, a scum skimmer main body 11 is provided on the lower end side of this lever, and flexible shears 10, 10 are provided oppositely on the upstream and downstream sides of this main body 11. In the embodiment of the present application, the flexible shears are provided on both the upstream and downstream sides of the scum skimmer main body, but it is also possible to provide them on either one side. This flexible Zeki 10,10
is connected to the aforementioned bushing rods 8, 8 via a shaft and positioned at a slightly higher level than the normal operating water level, so that when the flexible bolts 10, 10 are bent downwardly, they sink under the water surface and the scum skimmer main body 1
Allow scum to flow into 1.

This lever 4 is rotated about a shaft 6 by an operating piece 3 attached to a flight 23, as shown by the chain line in FIG. stipulate.

With the above-described configuration, the flight of the sludge scraper moves on the water surface by driving the flight, and scrapes the scum on the water surface toward the scum skimmer main body.
When the operating piece protruding from the flight moving on the bottom of the pond comes into contact with the lever 4 and pushes it up, it rotates around the shaft 5 and pushes down the bushing rods 8, 8 via the shaft 7. The chain attached to the flight at the bottom of the pond is the load side that scrapes up sludge from the bottom of the pond, so the chain will not loosen even if there is resistance to push up the lever, and there is no risk of the chain slipping from the sprocket foil or breaking. .

Next, the flexible shears 10, 10 connected to the bushing rods 8, 8 via the shaft 9 bend to allow the scum on the water surface to flow into the scum skimmer body. Subsequently, the upward force on the lever by the actuating piece when the flight passes through the lever position is released, and the weight of the lever lifts the flexible bolts 10, 10 through the bushing rods 8, 8, thereby preventing the floating scum from flowing in. . In this way, the scum floating on the upstream and downstream sides of the scum skimmer flows into the scum skimmer main body and is removed every time the lever is lifted by the operating piece of the flight.

Also, as shown in Fig. 3, in consideration of the case where the sludge scraper is operated in the opposite direction, the lever 4 is pinned at one end that contacts the operating piece 3, and is brought into contact with the operating piece in normal rotation. It is also possible to have a structure in which the actuating piece is rotated in the reverse direction around the pin to remove the actuating piece.

Effects of the invention: By placing a lever in contact with an operating piece protruding from the flight at the bottom of the pond, the scum skimmer is opened and closed by rotating the lever, and the lever acts on the load side of the chain, eliminating chain troubles. have an effect.

[Brief explanation of the drawing]

Figure 1 is a front view, Figure 2 is a side view, and Figure 3 is a detailed view of the lever. In the figure, 1 is a settling tank, 2 is a sludge scraper, and 22
is the chain, 23 is the flight, 3 is the operating piece, and 4 is the lever.

Claims (1)

[Scope of utility model registration request] Flights attached to the chain of a chain conveyor move on the water surface and scrape up floating scum.
In addition, in a sludge scraper that collects scum by opening and closing a downstream scum skimmer using the flight or the movement of an actuating piece attached to the flight, the scum skimmer is attached to the actuating piece attached to the flight at the bottom of the pond. A scum skimmer characterized by a lever that comes into contact with the lever that opens and closes the scum skimmer.