JP2594698Y2 - 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 the sludge is driven by a driving device installed above the center gauge. It has become so. However, such a conventional device not only has a complicated structure, but also has a central drive system, so that the mechanism for transmitting the driving force needs to have a durable strength structure, which only leads to an increase in cost. And drive loss also occurs. This
To solve this problem, the outer circumference of the rake arm
A circulating member along the inner periphery of the pond is arranged on the side, and the outer periphery of the circulating member
Along with the chain and gears
These are driven to rotate by a driving member such as a rocket.
There is one configured. However, this orbiting member is
Because it is a system formed with a large diameter ring member,
The diameter of a large circular sedimentation basin is several tens of meters.
It becomes difficult to carry the rack.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems, and has been developed in the bottom of a circular sedimentation basin.
A rotating member arranged at the center and rotating about the center in a longitudinal axis
Around the center extending in the outer diameter direction from the outer periphery of the rotating member
Orbiting with the rotating member to scrape
Rake arm and the outer edge of the rake arm
A circle is formed concentrically with the center so as to pass through
And the endless member along the outer periphery of the member.
And the drive source meshing with the chain
Sprocket installed on the inner wall of the pond so that
And a sludge scraping device of a circular sedimentation pond composed of
The rake arm is composed of a plurality of
Radially arranged at the center and the same rake arm
One end of the rotating member and the other end of the rotating member
The orbiting member is detachably attached by a mounting tool, and the
Arc-shape formed in a divided shape with the same length in the direction
Components that are adjacent to each other in the circumferential direction are
The connection is made at the end of the struts protruding from the rake arm.
Characterized by being made through the edges
You .

[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 an 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 sludge discharge means (not shown) such as a pump (not shown). Guide grooves 5 into which sludge flows are formed at four places on the outer periphery of the sludge pit 4.

Above the pit 4, a fixed plate 6 having a cross shape as viewed from above is bolted. A sewage inflow pipe 7 is provided upright at the center of the fixed platen 6 so that sewage is guided from outside the pond. A bush 9 is provided on the fixed plate 6 via a thrust bearing 8, and a rotation receiving cylinder (rotating member) 10 is provided on an outer periphery thereof. A rake arm 11 is attached to the outer periphery of the rotary receiving cylinder 10 so as to extend in all directions, and is capable of rotating.

[0007] At the lower part of the rake arm 11, a scraping plate 12 is attached. The scraping plate 12 is provided with a roller 13 at the outer end, and the roller 13 follows the pond bottom wall 3 so that the scraping plate 12 can move up and down in accordance with the amount of the precipitate. At this time, the rake arm 11 and the rake plate 12 move up and down along the sewage inflow pipe 7.

On the outer periphery of the rake arm 11, there is provided a circling member 15 formed in a ring shape by an L-shaped channel material so as to extend over the whole thereof. This orbit
The member 15 and the rake arm 11 are connected by a connecting member 16. That is, the rake arm 11 rotates with the orbiting member 15.

The orbiting member 15 is driven to rotate by a chain 17 attached to the member 15 and a sprocket 18 fixed to the pond peripheral wall 2 side. The sprocket 18
It is fixed by a bracket 19 and is driven in one direction by a rotary drive shaft 20 and a drive source (motor and reduction gear) 21 provided on the peripheral wall 2 in a vertical direction.

[0010] The bracket 19 additionally includes an inner roller 2.
2 is attached, and stable rotation of the orbiting member 15 is ensured. At the upper end of the sewage inflow pipe 7, sewage flows out into the pond as indicated by an arrow, and is allowed to settle. In addition, from the rake arm 11, a support column 100 is provided upright.
It is, to nearest scrape the scum floating on the water surface through the upper end
A scraper 101 is attached. Therefore,
When the key arm 11 rotates, the scraper 1 accompanies this rotation.
01 rotates. The scraper 101 has a float 10
2 is attached.

FIG . 2 shows a chain drive as shown in FIG .
Especially with respect to the rake arm
FIG. 4 is a plan view showing a feature of the present invention. this
In the embodiment, the method of construction of the scraping device is divided and assembled in the circumferential direction.
Is shown. 52 is a center rotating cylinder (rotating
), The rotary receiving cylinder 52 is provided with a pond in the same manner as in the previous embodiment.
It is rotatably provided by a fixed plate fixed to the bottom.
You. At the outer periphery of the same tube 52, mounting tools 53 are provided at four places.
It extends in all directions so that it can be detached through these
Rake arms 54 are attached. This rake
Attachment / detachment to the outer radial end of the arm 54 with the attachment 55
The orbiting member 56 is freely attached, and
From the middle of the key arm 54, a pair of left and right struts 57,
57 is extended. Each end of the strut 57
Abutment which is bolted to the inner periphery of the end of member 56
A material 58 is provided.

The rake arm 54 and both struts 57 and 5
7. The contact member 58 constitutes one unit.
The rake arm 54 is attached to the rotating cylinder 52
And the tip of the rake arm 54 is also attached to the fixture 5.
5, the orbiting member 56 is attached. And the patch
Adjacent members 58 are welded together at the site to provide
Configuration.

The orbiting members 56 are circular as a whole.
A chain 59 or gear is attached along the outer circumference
You. In this way, labor on site can be saved.
Both are convenient for transportation. The rake arm 54
It is also possible to construct a device having a different diameter by increasing the length.

FIG . 3 shows an additional example. This example
, Fixed plate 26 is fixed above sludge pit 25
The vertical axis 27 is fixed to the fixed platen 26 and
I have. A thrust bearing 28 is provided on the vertical axis 27.
The rotation receiving cylinder 30 is provided thereon via a bush 29.
Is provided. The outer periphery of the receiving cylinder 30 has a rake
A base receiver 32 for receiving the base of the arm 31 is provided .

A rake arm 31 is attached to a base 33 by a shaft 33.
And rotatably received at the slot 34
And the stopper 35. Loosen the stopper 35
First, the angle of the rake arm 31 can be changed.
Reference numeral 36 denotes a follow-up roller, which
1 can move up and down. Rake arm 31
The float attached to the arm 31 helps the movement
37 and the spring at that time is a spring 38.
You.

A circling member 39 is provided on the outer periphery of the rake arm 31.
The peripheral gear 40 provided on the member 39 is
It is designed to be driven by a nonion 41. In addition,
As indicated by the imaginary line, the rake arm 31 varies depending on the amount of precipitation.
The air tank 42 is attached to the arm 31 so that the
May be provided. In this tank 42, if necessary,
Water is supplied or water is supplied instead.

FIG . 4 also shows an additional example. In this example
In this case, an air supply pipe 45 is provided in the center,
Air supply body in a sealed state around the outer circumference of IP45
46 is provided rotatably. Outside this supply 46
A rake arm 47 is attached around the circumference.
The air guide pipe 48 is provided on the
Air from the pipe 48 to the pond through the squirt pipe 49
Is spouted. As a result, dirt in the pond
Water tends to precipitate. Note that, as shown by the imaginary line,
The air arm 50 has an air tank 50, and the tank 5
0 to make the rake arm 47 move up and down
Is also good.

FIG. 5 shows a rotary drive shaft 60 driven to rotate by a rotary blade 62 provided in an overflow weir 61.
An additional example is shown. Although the supernatant water flows into the overflow weir 61 from the pond and becomes a considerable amount, it is devised that a rotational driving force is obtained by using this amount of water. Note that 6
Reference numeral 3 denotes a water flow suppressing plate for applying the water flow to a part of the rotary blade 62 so as to rotate the rotary blade 62 instead of the whole.

FIG. 6 shows another example of the drive system of the rake arm 70. A plurality of brackets 72 are fixed near the bottom of the pond surrounding wall 71, and a rotation drive shaft 73 is inserted and supported by using one of the brackets 72, and a sprocket 74 is provided around the coaxial 73.
Is installed. Using a plurality of brackets 72, a circling member 75 is fixed so as to extend in the circumferential direction.

A part of the orbiting member 75 includes a sprocket 74
A sprocket 74 facing from the opening 76 is hung on a chain 77 moving inside the orbiting member 75. Attachment 78 to chain 77
And a pin 79 extending in the inner diameter direction by the mounting tool 78 is provided. This pin 79 is the rake arm 7
It is caught on 0 and accompanied.

The chain 77 can be made special. That is, the rollers 77a are provided at the top and bottom, and these rollers 77a roll on the edge of the orbiting member 75.

[0022] Further, as shown in FIG.
1 is formed in an arc shape, and the scum of the water surface gradually scratches in the outer diameter direction.
So that it can be approached,
Attract the scum into the specified scum removal device 102
In some cases, it is discharged outside.

[0023]

[Effect of the invention] The idea is that the rake arm
Since the circling member is divided and joined in the circumferential direction,
Transportation is greatly simplified and construction is simplified.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a feature of the present invention.

FIG. 3 is a longitudinal sectional view showing an additional example.

FIG. 4 is a longitudinal sectional view showing an additional example.

FIG. 5 is a sectional view showing another driving method.

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

FIG. 7 is a plan view showing another additional example.

[Explanation of symbols]

52 ... Rotating member 54 ... Rake arm 56 ... Circulating member 57 ... Stretch member 59 ... Chain

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01D 21/00-21/34

Claims (1)

(57) [Scope of request for utility model registration] 1. A circular sedimentation basin, which is disposed at the center of the bottom of the circular sedimentation basin.
A rotating member that rotates in a vertical axis around the center, and an outer portion of the rotating member.
Extending radially from the circumference to scrape around the center
Rake provided to orbit with rotating member
Arm and the rake arm
A circling member provided in a circular shape concentrically with the center;
A chain provided endlessly along the outer circumference of the orbiting member
And the same chain is rotated by the drive source
And a sprocket provided on the inner wall of the pond
A sludge scraping device for a circular settling pond, wherein the rake arm is provided.
Is composed of a plurality of radial
And one end of the rake arm is
The other end of the member and the other end of the orbiting member can be attached and detached with the fixture
Is mounted so that the circling member has the same length in the circumferential direction.
It is an arc-shaped member that is divided into
Adjacent to each other are connected to each other,
Through the tip of the struts protruding from the key arm
A sludge scraping device for a circular sedimentation basin, characterized in that: