JPS5923780Y2 - Rake opening/closing device in dust remover - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rake opening/closing device for a dust remover, and its purpose is to reduce the weight of the rake itself, reduce the motor capacity, and ensure its operation.

The present invention will be explained below based on the illustrated embodiments.

In the figure, 1 is a screen installed in a waterway such as a sewage treatment plant or a pump station, and a drive sprocket wheel 2 driven by a drive device M and a driven sprocket are located upstream from this screen and facing each other vertically. A wheel 3 is provided, and an endless chain 4 for raking through a screen is stretched between the wheels 2 and 3, and rake guides 5a, 5b, and 5C are arranged parallel to the chain 4.

The sprocket wheels 2, 3 of the rake guides 5a, 5b, 5C are supported by a frame F or a rake frame 6 provided on the waterway.

Further, a rake device which is attached to a part of the chino 4 and which moves up and down while opening and closing the rake as the chino is driven is shown in detail in FIGS. 2 and 3.

This connects the upper end of the rake opening/closing arm 7 with the required length to the shaft 8.
An opening/closing roller 9 is provided protrudingly connected to the chino 4 through the shaft 8 and engaged with the rake guides 5a and 5b in the vicinity of the shaft 8, and at the lower end of the arm 7 as required. Two links 10.11 are pivotally connected via a shaft 12.13 at an interval, and a pin P is attached to the tips of both links 12.13.
The upper end of a rake arm 14 having a rake 15 at its lower end is pivotally connected via , , P, , and a position holding roller 6 is rotatably supported at the tip of a shaft 13 . A stopper device 16 is provided between one end and the rake opening/closing arm 7, so that when the rake opening/closing arm swings, the rake arm also swings together, but the swinging of the rake arm side is not transmitted to the rake opening/closing arm.

The above-mentioned device, that is, a rake device consisting of a chain suspended between vertically opposed wheels, a rake guide, a rake opening/closing arm, a rake arm, etc. that is attached to the chain and moves up and down along the rake guide, is installed on the opposite surface of the waterway. This patent features a left and right rake device in which a connecting rod 17 is installed horizontally between the opposing rake arms provided on the inner surface, and the transverse shaft 13 communicates between the left and right opposing rake opening/closing arms.

Note that it is also possible to use a guide bent in a U-shape instead of the driven sprocket wheel 3.

When the chino is driven by the drive device, the rake device attached to the chino moves up and down along the rake guide.

At this time, when the opening/closing roller 9 is on the screen proximity side 5a of the rake guide, the rake opening/closing arm is tilted by this opening/closing roller and the position holding roller 6, and the rake arm is swung through the two links, and the rake is opened. The rake moves away from screen 1 and descends.

When the shaft 8 rotates around the driven sprocket wheel, the opening/closing roller 9 moves from the rake guide 5a to the rake guide 5b, so the rake opening/closing arm becomes approximately parallel to the screen, and the rake arm swings toward the screen side. The moving rake is pressed against the screen.

At this time, a force is applied to the rake opening/closing arm via the stopper device so that the set pressure contact force is achieved.

In this state, the rake rises and scrapes up the screen debris.

However, if there is sediment on the bottom of the channel near the flat end of the rake and the rake does not reach the set lower end, if the rake is within the specified limit, the rake opening/closing arm will descend with the rake riding on the sediment. Both links open and reverse at the driven sprocket wheel.

When the rake opening/closing arm further rises, the stopper device hits the arm 7 and closes against the screen due to the rake's own weight, thereby achieving normal raking of screen debris.

According to the present invention, the rake device is connected by two links between the rake opening/closing arm and the rake arm equipped with a rake at the lower end, and the rake opening/closing arm is provided with an opening/closing roller and a position holding roller, and these rollers are used as a rake guide. Since the rake is configured to be supported by the waterway, when sand etc. accumulates on the bottom of the waterway, the rake contracts, allowing smooth movement at the reversing section and escaping against overload. The structure is simple, and by being lightweight and compact, it has the advantage of reducing the motor capacity.

[Brief explanation of drawings]

Figure 1 is an overall schematic diagram, Figure 2 is a front view of the rake device,
FIG. 3 is a side view of the same, and FIG. 4 is a sectional view of the opening/closing roller portion. 1... Screen, 2... Drive sprocket wheel, 3... Driven sprocket wheel, 4... Cheno, 5a, 5b, 5C...
...Rake guide, 6...Position holding roller,
7... Rake opening/closing arm, 8... Axis,
9... Opening/closing roller, 10.11... Link, 12, 13... Axis, 14... Rake arm, 15... Rake, 16...
・Stopper device, 17...Connecting rod.

Claims (1)

[Scope of utility model registration request] In a dust remover, a rake guide is provided parallel to a chain stretched between vertically opposed sprocket wheels, and the rake device is moved up and down along the rake guide by the drive of the chain. An opening/closing roller that is engaged and regulated by a rake guide for opening and closing the rake is provided protrudingly, and a rake arm having a rake at the lower end is pivotally connected to the lower end of the rake opening/closing arm via two links, A rake opening/closing device for a dust remover, which is provided with a stopper device between the one link and the rake opening/closing arm so that the rake escapes when a load exceeds a specified value.