JP2583439Y2 - Sludge scraper for circular sedimentation basin - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for scraping sludge in a circular sedimentation pond.

[0002]

2. Description of the Related Art A sludge scraping device is formed in a circular first sedimentation basin or the like.

[0003]

In the conventional sludge scraping apparatus, a center gauge having a rake arm is provided on the outer periphery of a column erected in a pond, and is driven to rotate by a driving device installed above the center gauge. It has become so. However, in such a conventional device, a pedestrian bridge or the like over the pond is required, which not only complicates the structure, but also increases the cost.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and comprises a driving source installed on the outer periphery of a pond and a fixed shaft fixed in a vertical axis above the pit at the bottom of the pond. A rake arm provided on the lower outer periphery of the fixed shaft so as to be able to orbit, a gear box fixedly provided on an upper outer periphery of the fixed shaft, and a rake arm rotatably provided in the box so as to rotate together with the rake arm. And a drive gear that meshes with the driven gear, and a transmission shaft provided between the drive gear and the drive source.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 shows a first embodiment of the present invention. In this embodiment, reference numeral 1 denotes a circular sedimentation basin, which has a peripheral wall 2 and a bottom wall 3. The bottom wall 3 has a conical shape, and a sludge pit 4 is formed at the center thereof. The pit 4 is connected to a sludge discharge means (pump or the like) (not shown) in communication therewith, and is configured to discharge what has settled out to the outside. Guidance grooves into which sludge flows may be formed at four locations on the outer periphery of the pit 4 to make it easier for sludge to flow.

Above the pit 4 is a sludge inlet 5 on the outer periphery.
Is fixed by bolts. A vertical axis 7 is erected from the center of the fixed platen 6, and a receiving plate 8 is fixed to a lower portion of the outer periphery of the coaxial 7, and a thrust bearing 9 is provided thereon. A rotary cylinder 10 is provided on the outer periphery of the longitudinal axis 7 via the bearing 9, and the shaft 10 is rotatably received around the longitudinal axis 7 via a radial bearing 11.

A plurality of rake arms 13 are attached to the outer periphery of the rotary cylinder 10.
Are received on the fixed platen 6 by lower rollers 14. At the lower part of the rake arm 13, a scraping plate 15 is provided.
Are respectively attached.

A gear box 16 is fixedly mounted on the outer periphery of the upper part of the longitudinal axis 7, and the lower part of the gear box 16 is sealed with the longitudinal axis 7, and a driven gear 18 and a drive A gear 17 is provided.

The driven gear 18 rotates around the outer circumference of the longitudinal axis 7 and rotates together with the rotary cylinder 10 to rotate the rake arm 13.
Is driven to rotate. The drive gear 18 is driven via a universal joint 20 formed between an outer end of the shaft and a drive source 19 installed on a pond.

That is, when the drive source 19 is driven, the drive gear 17 and the driven gear 18 are driven via the universal joint 20, and the rake arm 1 is driven via the rotary cylinder 10.
3 is driven to rotate. The vertical axis 7 and the gearbox 16 are in a fixed state.

Incidentally, a stirring propeller 21 may be provided on the outer periphery of the universal joint 20. Further, as shown by a virtual line, the universal joint 20 may be extended horizontally, and the universal joint 20 may be configured in the drive source 19 via the relay box 22 fixed to the peripheral wall 2.

FIG. 2 shows a second embodiment. In this embodiment, the universal joint 20 is extended horizontally, and is guided outside the pond via a receiving cylinder 24 inserted into the peripheral wall 2. Note that a seal 25 is provided between the receiving cylinder 24 and the universal joint 20.

FIG. 3 shows a third embodiment. In this embodiment, as shown in FIG. 4, a circular sedimentation basin is constituted by joining sector-shaped blocks 26 in the circumferential direction, and in particular, one of the blocks is used for driving as shown in FIG. It is composed. That is, 27
It is a stationary plate, on which a rotating shaft 28 is provided in a longitudinal axis. The rake arm 29 is driven to rotate via the rotation shaft 28. A driven gear 30 is attached to a lower portion of the rotating shaft 28 and is driven to rotate by a driving gear 31.

The gears 30 and 31 are separated from a pit 33 by a box 32, and the drive gear 31 is rotated by a transmission shaft 34. The transmission shaft 34 is guided through a bottom in a cavity 35 formed inside the outer peripheral portion of the block 27. The transmission shaft 34 is rotationally driven by a chain driving unit 37 between the transmission shaft 34 and an upper driving source 36.

As shown in FIGS. 3 and 5, the drive shaft 36 extends toward the inner periphery of the pond, and the scum removing device 40 is driven by a crankshaft 39 provided at the end of the shaft 36. It has become. The device 40 includes a trough 41
A rotatable shaft 42 rotatably provided on the front side thereof, and a float 43 having an oval cross section supported up and down via the rotary shaft 42 so as to be vertically movable.
A scum discharge pipe 44 is connected to the lower part of the scum guide and is led to the outside. The float 43 is configured to move up and down as the crankshaft 39 rotates.

Note that, as shown in FIG.
9 may be formed to have an inverted S shape when viewed from above to improve the scraping effect.

FIG. 6 shows another driving means. This driving means is of a type in which one circular sedimentation basin is constituted by a combination of blocks 50 as shown in FIG. The drive shaft 52 is driven by the drive source 52 and the rake arm 54 is driven to rotate. The rake arm 54 may be provided with a support 56 and a schema 56 for collecting scum on the water surface. Then, the driving source 52 allows a worker to enter through the cavity 57 of the block 50 so that maintenance can be freely performed at any time. In addition, 58 is a ladder.

FIG. 7 shows another driving example. In this example, a fixed plate 60 is provided at the bottom of the pond, and a rotating shaft 62 is provided via a fixed cylinder 61, and the rake arm 63 is driven to rotate by the rotating shaft 62. Rotary shaft 6
2 is rotationally driven by a drive source 65 attached via a stay 64. Note that the drive source may be provided at a position extending through the transmission shaft 66 as indicated by a virtual line.

FIG. 8 shows a driving example relating to an oxidation ditch of a dividing ratio type in the circumferential direction. The block 70 additionally comprises a cavity 71 in which the drive source 7
2 constitute a stirring blade 73 driven in the pond and a chain driving means 74 for guiding power upward. The chain driving means 74 drives the crankshaft 76 via the upper driving shaft 75 to operate the scum removing device 77 having the same configuration as that of the above-described embodiment.

FIG. 9 shows an example in which a drive source 81 is provided directly at the upper end of the vertical axis 80 instead of the configuration from the drive source to the gears in FIG. In this example, the drive source 81 is a submersible motor or a pump, and its drive shaft 82 is fitted in the upper end of a fixed vertical axis 80 to be in a fixed state.
A pin 84 protrudes from a flange 83 on the body side of the body 1 and is fitted in a hole 86 of the rotary cylinder 85 so as to be insertable and removable. The rotation of the rotating cylinder 85 via the pin 84 by the rotation of the body drives the rake arm 87.

The cord or hydraulic circuit to the drive source 81 rotates underwater. To eliminate this, for example, another wire is attached along with a wire for lifting the drive source 81 from the water to the water. And the wire may be connected to the drive source 81 via a rotary joint.

[0022]

[Effect of the invention] This invention is as described above.
The structure is simplified, the cost can be reduced, and the maintenance is facilitated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an apparatus showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment.

FIG. 3 is a longitudinal sectional view showing a third embodiment.

FIG. 4 is a plan view showing an example of a block type circular sedimentation pond together with a special rake arm.

FIG. 5 is a side sectional view of the scum removing device.

FIG. 6 is a longitudinal sectional view showing another example.

FIG. 7 is a longitudinal sectional view showing another example.

FIG. 8 is a longitudinal sectional view showing another example.

Claims (1)

(57) [Scope of request for utility model registration] 1. A drive source installed on the outer periphery of a pond, a fixed shaft fixed on the pit above the pond bottom in a vertical axis, and a rake arm movably provided on the lower outer periphery of the fixed shaft.
A gear box fixedly provided on the upper outer periphery of the fixed shaft, a driven gear rotatably provided in the box and adapted to rotate with the rake arm, a driving gear meshing with the driven gear, and a driving gear; A sludge scraping device for a circular sedimentation basin having a transmission shaft provided between the driving source and the driving source.