JPS6115204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic dust remover for scraping up and removing floating matter such as solid filth and dirt in waterways in sewage treatment equipment, water intake equipment, etc.

In this type of dust remover, the filth, solid matter, etc. that flow into the screen along with the sewage drainage become firmly attached to the screen over a certain period of time. In many cases, the amount of load must be detected, and if there is an overload, the operation must be stopped and the attached dirt must be removed using equipment.

The purpose of the present invention is to solve this problem.When filth and solid matter, especially large solid matter such as wood chips, flow in with sewage drainage and hit the screen or are raked up with a rake, the Even when a load is applied, the rake arm is appropriately relaxed so that dirt and solid matter can be raked up and removed while continuing operation without being overloaded.

Next, one embodiment of the present invention will be described with reference to the drawings.

Side plates 3, 3' are provided above the liquid level of the channel at both left and right ends of the screen 2 installed in the channel 1, pin racks 4, 4' are attached, and descending guides 5,
5' and rising guides 6, 6' are provided. (4',
5' and 6' are not shown) The screen 2 has an inclination of about 60° to 90° with respect to the downstream side of the flow path 1 from the horizontal. In the following, the reference numerals of the respective parts arranged symmetrically on both sides in relation to the side plates 3, 3' may be omitted unless particularly necessary.

The descending guide 5 descends from the upper part of the side plate 3 on the downstream side in parallel with the pin rack, and its lower end is curved in the opposite direction to the pin rack 4 and is connected to the lower end of the ascending guide 6. . Further, the ascending guide 6 faces upward in parallel with the descending guide 5 from the lower end connection point 7 of the descending guide 5, and its upper end is curved in the direction of the pin rack 4, and the connecting point 8 is slightly below the upper end of the descending guide 5. Connected at .

On the other hand, the trolley 9 is provided between the side plates 3 and 3', and has side frames 10 and 10' and a fixed frame 11 that connects them.
A forward/reverse switchable electric speed reducer 12 is installed inside one side frame 10, and a drive shaft 13 protrudes through the side frame 10 via a mechanical seal, with a drive sprocket at its tip. 14 is fixed. A main shaft 15 is rotatably attached to the side frame 10, 10' through approximately the center thereof.
Main rollers 16, 16', small gears 17, 17', and a driven sprocket 18, which generally has a diameter larger than the diameter of the drive sprocket 14, are fixed to both ends of the main shaft 15 which protrudes outward at points 0 and 10'. The main rollers 16, 16' are fitted so that they can roll on the lowering guides 5, 5', and the side frames 10, 10'
A shaft 19 penetrates through the lower part of the frame and is rotatably attached, and the shaft 19 projects outward from the side frames 10, 10'.
Loop-shaped circulating guide rollers 20 and 20' are fixed to both ends of the lower guides 5 and 5' and the upper guides 6 and 6' so that they can roll in a loop. The drive sprocket 14 and the driven sprocket 18 are linked by a chain 21, and the small gear 17 meshes with the pin rack 4.

connection point 7 of the descending guide 5 and the ascending guide 6;
8 is equipped with non-return mechanisms 22, 23 such as flappers, a limit switch 24 for switching the speed reduction motor 12 between forward and reverse directions, and a stop limit switch 25. Furthermore, rake arms 26, 26'
is swingably supported through the shaft 19, and a rake rake 27 is attached to the lower tip of the rake arms 26, 26'. Rake arm 26,2
The upper end of 6' and the fixed frame 11 are connected by a shock absorber 28 such as a spring. In addition, a wiper 29 is provided above the screen 2 on the downstream side of the flow path 1 of the side plate 3 to scrape off dirt and solid matter scraped up by a rake 27, and the scraped dirt and solid matter are transported to a predetermined location. A belt conveyor 30 is provided below the wiper 28.

Next, the operating state will be explained.

The carriage 9 is located above, the small gear 17 meshes with the upper part of the pin rack 4, and the main roller 16 and the loop-shaped circulating guide roller 20 are connected to the lowering guide 5.
The main roller 16 is fitted in the upper part of the main roller 16. In this state, the rake arms 26, 26'
is parallel to the surface of the screen 2, and the rake 27 is separated from the screen 2.

When the electric reducer 12 starts to operate, the drive sprocket 14 rotates, the driven sprocket 18 is decelerated and rotated by the chain 21, the small gear 17 meshes with the pin rack 4 downward, and at the same time the main roller 1
6 and the loop-shaped circulating guide roller 20 also roll downward on the lowering guide 5, and the rake arms 26, 26' also move downward parallel to the screen 2 while maintaining the distance therebetween. When the loop-shaped circulating guide roller 20 reaches the connection point 7 and passes through the check mechanism 22, the limit switch 24 is activated and the electric speed reducer 12 is reversely switched. When this state is reached, the rake arms 26, 26' are tilted toward the screen 2, and the rake 27 comes into contact with the upstream surface of the screen 2 in a pushing manner. Electric reducer 1
2 is reversed, and the small gear 17 engages and moves the pin rack 4 upwards, contrary to the above, and at the same time, the main roller 1
6 continues to roll upward on the descending guide 5,
The loop-shaped circulating guide roller 20 is the ascending guide 6
As the rake 27 rolls upward, the rake 27 presses and slides on the surface of the screen 2 and scrapes up and removes dirt and solid matter stuck to the screen 2. In this case, even if an overload is applied to the rake 27 due to large solid matter or dirt adhering to the surface of the screen 2, the shock absorber 28 operates to provide a buffering force to prevent an excessive load from being applied to the rake 27. The dust removal work can be continued without stopping the operation. filth raked up by rake 27;
While the rake 27 is moving up, the solids are moved to a predetermined belt conveyor 3 by the wiper 29.
0 and transported to another processing plant. The wiper 29 expands and contracts while its direction is fixed, and the rake 27 is gradually pushed in as it continues to rise, completing scraping off dirt and solid matter. After this scraping operation is completed, the loop-shaped circulating guide roller 20 reaches the connection point 8 and passes through the check mechanism 23, at the same time the limit switch 25 is activated and the electric reducer 12 is stopped, returning to the above-mentioned initial state. One scraping is completed. The device of the present invention repeatedly performs this operation.

As explained above, in the device of the present invention, even if dirt or solid matter adheres to the screen or large solid matter is caught, the dust removal work can be continued without stopping the operation due to the operation of the buffer device. You can do it. Furthermore, it has the advantage that it has a simple structure, and the rake buffer mechanism is extremely simple, so there are almost no failures. Moreover, the purpose of scraping off dirt and solid matter that has been scraped up can be effectively achieved by operating the telescopic wiper and the shock absorbing device during the transition from one dust removal operation to the next dust removal operation.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a side view in an operating state, and FIG. 2 being a front view. 1... Channel, 2... Screen, 3, 3'...
Side plate, 4...Pin rack, 5...Descent guide, 6
...Rise guide, 7, 8...Connection point, 9...Dolly, 12...Electric reduction gear, 16, 16'...Main roller, 17, 17'...Small gear, 20, 20'...
...Loop-shaped circulating guide roller, 22, 23...
Non-return mechanism, 24, 25...changeover switch, 26,
26'... Rake arm, 27... Rake, 28
...Buffer device.

Claims (1)

[Claims] 1. A pin rack is provided on the side plate arranged approximately parallel to the vertical direction of the screen surface above the liquid level at both the left and right ends of the screen arranged across the flow path, and the lower end of the pin rack is oriented downward from the upper side of the flow path. A lowering guide whose part is curved in the opposite direction to the pin rack, and a rising guide connected to the lower tip of the lowering guide, facing upward parallel to the lowering guide, and having an upper end curved in the direction of the pin rack and connected to the upper part of the lowering guide. A small gear is provided which meshes with the pin rack, a main roller that rolls up and down a descending guide at the tip coaxial with the small gear, and a loop-shaped circulating guide that is located below the main roller and rolls both guides in a loop. A trolley equipped with rollers is provided, a forward/reverse switching electric reducer for driving the small gear is attached to the trolley, a loop-shaped traveling guide roller non-return mechanism and a changeover switch are installed at the connecting points of both guides, and a rake arm is attached to the trolley. An automatic dust remover characterized in that it is pivotably supported and a buffer means is installed between the rake arm and the truck.