JPH0344314Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a non-powered scum skimmer that automatically removes scum from a settling tank without using any other power.

Conventional technology and its problems Scum skimmers in sedimentation basins are generally opened and closed manually, and this opening and closing operation is periodically performed by workers. This has the disadvantage that it requires too much effort on the part of the workers. In recent years, with the trend toward automation in treatment plants, there has been a demand for scum skimmers that can be easily retrofitted to existing equipment. To solve this problem,
A method has been proposed in which the sludge scraper is opened and closed using an electric or hydraulic operation separate from the drive source, but this method is unsuitable from the perspective of energy conservation.

The purpose of the present invention is to automatically open and close a scum skimmer without using any other power.

Means for Solving the Problem: An apron with a weight fixed to one end and provided on both upstream and downstream sides of the scum skimmer main body, a lever with the weight connected to it with a connector and one end pivoted above the water, and the lever. The scum skimmer is automatically opened and closed to remove floating scum without using any other power source.

Embodiments The present invention will be described below based on drawings of embodiments.

In the figure, 1 is a sedimentation tank, and 2 is a scum scraper installed in the longitudinal direction of this sedimentation tank or in any direction. 22, a large number of flights 23 are arranged at regular or arbitrary intervals, and by driving this chain, the flights 23 for scraping sludge scrape the scum floating on the water surface toward the pond end side and other scum removal positions. Let it come closer to you. Of course, the flight is in the floating position during this scum scraping. Of the total number of flights 23, the striker 3 is provided protruding from one or several of them.

In addition, a lever 4 is installed above the water surface of the sedimentation tank 1 a little before the scum skimmer is installed, and the base end of this lever 4 is attached to a bracket 5 that projects from the pond side wall or other fixed side. The lever 4 is swingably provided through the lever 4, and a striker 3 protruding from the flight swings the lever 4 so as to lift it.

Further, a scum skimmer body 7 is provided on the downstream side of this lever, and aprons 8, 8 are provided facing each other on the upstream and downstream sides of this body 7, respectively, and a weight is attached to the end of each apron 8 on the side opposite to the scum skimmer body. 9 are provided respectively. Preferably this apron 8
The anti-weight side of the apron 8, that is, the end of the scum skimmer main body, is bent and pivoted to the scum skimmer main body at approximately the same level as the normal operating water level or a little lower than this operating water level, and when this apron 8 is in a horizontal state, The apron weight should be submerged below the water surface.

Then, on the pond, preferably, sheaves 10, 10 are provided above the lifting position of each apron, for example, above the weight position of each apron, and a sheave 11 is also provided above the lever, and a wire rope 12 is hung on these sheaves 10, 11. One end of this wire rope is locked to the weight or the end of the apron, and the other end of the wire rope is locked to the lever 4. Apron 8
are located on both the upstream and downstream sides of the scum skimmer body,
This wire rope is strung on each apron,
They are locked to the same lever. As shown by the chain line in Figure 1, when this lever 4 is not lifted by the striker, the lever weight of the apron 8 overcomes the weight of the weight 9, and the weight side of the apron is lifted slightly above the water surface. ing.

In the above-mentioned scum skimmer, the flight moves on the water surface by the flight drive, and when the lever is pushed up by the striker, this lever and apron are connected by a wire rope (or by a chain and a sprocket wheel). Since the weight at the tip of the apron is suspended, the weight of the weight causes the tip of the apron to sink below the water surface by the amount pushed up by this lever. At this time, the floating scum floating on the water surface flows onto the top surface of the apron. When the flight passes the lever position, the lever pushing force by the striker is released, and the apron is lifted up via the wire rope by the weight of the lever, returning to the position shown by the chain line in Figure 1, and floating because the tip of the apron is above the water surface. The influx of scum is prevented. In this way, the scum floating on the upstream and downstream sides of the scum skimmer flows into the scum skimmer body and is removed every time the lever is lifted by the striker of the flight.

Effect of invention The present invention has the following effects.

(1) The lever lifted by the flight striker and the apron placed upstream and downstream of the scum skimmer body are connected with a wire rope, so it can be installed regardless of the distance between the lever and the scum skimmer body. If you increase the number of wire ropes, you can support multiple scum skimmers.

(2) No separate power other than the power for the scum skimmer is required to swing the lever when the flight is driven, and it can be applied to existing scum skimmer equipment.

(3) Scum floating on the upstream and downstream sides of the scum skimmer can be removed at the same time.

[Brief explanation of the drawing]

FIG. 1 is a front view, and FIG. 2 is a plan view. 1 is a settling tank, 2 is a scum scraper, 23 is a flight, 3 is a striker, 4 is a lever, 5 is a bracket, 6 is a shaft, 7 is a scum skimmer body, 8 is an apron, 9 is a weight, 10 and 11 are Sheave, 1
2 is wire rope.

Claims (1)

[Scope of utility model registration request] A flight attached to the chain of a chain conveyor moves horizontally on the water surface to scrape up the floating scum, and a scum skimmer on the downstream side collects the scum.In the sludge scraper, a weight is fixed to one end to scrape up the floating scum. It consists of an apron provided on both upstream and downstream sides of the scum skimmer body, a lever that connects the weights with a connector and has one end pivoted above the water, and a striker provided on the flight so as to come into contact with the lever. Powered scum skimmer.