JPH0420482Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to a sludge scraper for a circular sedimentation tank.

[Technical background] A sludge scraper is configured in a circular primary settling tank. In a conventional sludge scraper, a center gauge having a rake arm is provided around the outer periphery of a support column set upright in a pond, and the center gauge is rotatably driven by a drive device installed above the center gauge. However, such conventional equipment is not only structurally complex, but also difficult to install on site, and the drive transmission system is exposed to water. There were disadvantages such as complicated maintenance.

[Purpose of the invention] In order to solve the above problems, this invention avoids structural complexity, makes it easy to install on site, and
The purpose of the present invention is to provide a sludge scraper with a circular settling tank whose drive transmission system is not submerged in water and whose maintenance is simple.

[Structure of the device] In order to achieve the above object, this device has a fixing plate attached to the center of the bottom of a sedimentation basin with a conical bottom, and a fixing shaft is fixed on top of the fixing plate. , and a vertical shaft-shaped rotating cylinder is rotatably supported via the outer periphery of the fixed shaft, and the lower end of the rotating cylinder is sealed with respect to the fixed shaft, while the upper end of the cylinder is A driving means is provided inside the rotary tube so as to protrude above the water surface, and has a connecting shaft connected to the fixed shaft so that the body is fixed to the rotary tube and rotates. A rake arm having a scraping means at the lower portion protrudes from the lower outer periphery of the rotary cylinder.

[Examples] This invention will be described below with reference to drawings showing examples thereof.

FIG. 1 shows an example thereof. Pond bottom 1
A sludge pit 3 having a drainage pipe is formed at the center of the bottom of the settling tank 2, which has a conical shape. A fixing plate 4 having a cross shape when viewed from above is attached above the sludge pit 3, and a fixing shaft 5 is fixed vertically to the center of the fixing plate 4. A bearing case 6 is attached to the base of the outer periphery of the fixed shaft 5 so as to be fixed to the fixed plate 4 side.

A bearing 7 is provided on the bearing case 6, and a rotating cylinder 8 is provided via the bearing 7. The rotary cylinder 8 has a cylindrical shape with a small bottom and a large top, and a motor 9 serving as a driving means is detachably attached to the rotating cylinder 8 through its intermediate bottom. A motor shaft 10 protrudes from the bottom of the motor 9, and the motor shaft 10 and the fixed shaft 5 are connected by a joint 11. Therefore, since the motor shaft 10 is fixed, the motor 9 rotates and the rotary cylinder 8 is also rotated thereby. Note that there is a seal 1 between the lower part of the rotary cylinder 8 and the fixed shaft 5.
It is sealed by 2. The wiring is rotating cylinder 8
guided from above.

A horizontal arm support shaft 13 is provided at the lower part of the rotary cylinder 8 via its outer periphery. Above this arm support shaft 13 is an angle adjustment shaft 14.
is provided with 15 lock levers. A pair of rake arms 16 are attached via these shafts 13 and 14 so as to be able to change their angle. A guide roller 17 is attached to the tip of each rake arm 16 and can be adjusted to move forward and backward in the rotational direction, and a scraping plate 18 is provided at the bottom of the rake arm 16. This scraping board 18 is
The angle adjustment means allows it to approach parallel to the pond bottom surface 1.

Furthermore, a conical lid 2 is provided at the upper end of the rotating cylinder 8.
1 is attached so that it can be opened and closed. Further, a rectifying tube 20 having a bottom flange portion 19 is fixed to the circumferential body of the rotary tube 8 so as to open upward. A sludge inlet 22 is formed on the outer periphery of the flow straightening tube 20 . Sludge flows into the straightening tube 20 from its upper opening and flows into the settling tank 2 from the sludge inlet 22. The sludge is guided by an inclined (60 degree) sludge guide plate 23 protruding from the rake arm 16, and is guided toward the center of the pond rather than toward the outer periphery.
A brush-shaped sludge scraper may be provided on the sludge guide plate 23 so as to be visible from the pond side. Further, the scraping board 18 may be of an air mat type.

As described above, the sludge that has flowed into the rotary cylinder 8 flows into the settling tank 2 through the sludge inlet 22. The flow of the sludge flowing into the settling tank 2 toward the center is regulated by a sludge guide plate 23 provided on the rotating rake arm 16. The scraping plate 18 is adapted to scrape up the sludge that has settled as it rotates, attracting it into the sludge pit 3, and discharging it through the discharge pipe. The body of the motor 9 rotates to rotate the rotary cylinder 8 and the rake arm 16.

According to the above-mentioned invention, the structure is extremely simple, it is easy to install on site, and the drive transmission system is not exposed to water, and Since then, maintenance has become easier. Furthermore, the rotating cylinder 8
functions as a large float, so you can lift the rake arm 16 and move the rake arm 16 lightly.
can be rotated. in this case,
The above-mentioned air mat also contributes to its nimbleness.

2 and 3 show examples unrelated to this invention. Among them, as shown in the example shown in FIG.
5 may be fixed, and the sprocket 26 on the rake arm 16 may be engaged with the fixed chain 25 to be driven by the drive motor 27. Alternatively, as shown in FIG. 3, a rail 28 may be provided on the pond bottom surface 1, and two guide rollers 29 that contact this rail 28 may be provided, one of which may be driven by a drive motor 27. good.

The motor 9 may be a hydraulic motor.

[Effects of the invention] As described above, according to this invention, a fixing plate is attached to the center of the bottom of the sedimentation basin whose bottom is conical, and a fixing shaft is fixed on top of this fixing plate. , and a vertical axis-shaped rotary cylinder is rotatably supported via the outer periphery of the fixed shaft, and the lower end of the rotary cylinder is sealed with respect to the fixed shaft, while the upper end of the cylinder is A driving means is provided inside the rotary tube so as to protrude above the water surface, and has a connecting shaft connected to the fixed shaft so that the body is fixed to the rotary tube and rotates. This is a circular sedimentation basin sludge scraping machine in which a rake arm with a scraping means at the bottom protrudes from the lower outer periphery of the rotating cylinder, so it avoids structural complexity and improves ease of construction on site. It is possible to provide a sludge scraper with a circular sedimentation tank that is easy to install (easy to install), has a drive transmission system that does not get wet, and is easy to maintain. .

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of this invention.
FIG. 2 is a sectional view showing an example not directly related to this invention, and FIG. 3 is a sectional view showing another example not directly related to this invention. 4...Fixed plate, 5...Fixed shaft, 8...Fixed tube, 16...Rake arm.

Claims (1)

[Scope of utility model registration request] A fixed plate is attached to the center of the bottom of the sedimentation tank, which has a conical bottom, and a fixed shaft is fixed on top of this fixed plate. The cylinder is rotatably supported, and the lower end of this rotating cylinder is
While the cylinder is sealed with respect to the fixed shaft, the upper end of the cylinder is designed to protrude above the water surface, and a connecting shaft is connected to the fixed shaft inside the rotating cylinder, so that the body is connected to the rotating cylinder. A sludge raking machine for a circular settling tank, which is provided with a driving means which is fixed and adapted to rotate, and a rake arm having a raking means at the lower part protrudes from the outer periphery of the lower part of the rotary cylinder.