JPS60158Y2 - Rotating contact plate in rotary sewage treatment equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotating contact plate installed in an aeration tank in a rotary sewage treatment device.

Conventionally, this type of rotating contact plate has a bubble storage pocket on its periphery, and the pocket contains the bubbles ejected from the aeration pipe in the aeration tank, and the rotating contact plate is driven to rotate by the buoyancy of the bubbles. is already known (see Japanese Patent Publication No. 52-40518).

However, in this conventional rotary contact plate, the bubble storage pocket is formed by attaching a pocket member made separately to the periphery of the circular substrate.
This requires a lot of work to attach the pocket member to the circular board, and the pocket member must be placed separately from the circular board in advance, which results in the problem that the rotating contact plate cannot be manufactured efficiently. Ta.

This invention solves the above-mentioned problems and makes it possible to form a large number of bubble containing sections with a large volume between the rotary contact plates simply by combining and joining the rotary contact plates, and is inexpensive. The purpose of this invention is to provide a rotating contact plate structure that can withstand long-term use.

This invention will be explained below based on embodiments shown in the drawings.

In FIGS. 1 to 4 showing the first embodiment of this invention,
1 is a rotating contact plate made of synthetic resin such as polyvinyl chloride, and 2 is a fan-shaped plate constituting this, each of which has a circular size of one quarter of N.

Reference numeral 3 denotes approximately U-shaped hollow convex portions arranged in two rows near the outer periphery of the fan-shaped plate 2, and these are integrally provided on the fan-shaped plate 2 by vacuum forming.

Two types of fan-shaped plates 2 are used, and two types of circular contact plates 1a and lb are made from these.

That is, the fan-shaped plates 2a and 2b are arranged opposite to each other.
The substantially U-shaped hollow protrusion 3b of the other second sector plate 2b is larger than the substantially U-shaped hollow protrusion 3a of the first sector plate 2a, and the smaller hollow protrusion 3a is larger. The flat top surface is joined to the joining flat part 4b of the second fan-shaped plate 2b on the inside of the narrow hollow convex part 3b, and the flat top face of the large hollow convex part 3b is joined to the second flat part 4b on the outside of the small hollow convex part 3a. The sector-shaped plates 2a and 2b are joined to the joining flat part 4a of the V-shaped sector plate 2a, and thus face each other;
That is, the rotating contact plates 1a and lb are joined together.

Bubble accommodating parts 5a and 5b surrounded by approximately U-shaped hollow convex parts 3a and 3b are formed in the middle of the rotating contact plates 1a and lb, and the inside of each hollow convex part 3a and 3b is a bubble accommodating part 5c. , 5d.

The bubble accommodating parts 5a and 5b are arranged in two rows in the circumferential direction of the rotary contact plate 1, and are opened on the side opposite to the rotation direction of the rotary contact plate 1.

Reference numeral 6 denotes five connecting portions integrally provided on each fan-shaped plate 2, which include a first connecting convex portion 7 in the shape of a substantially truncated cone that protrudes toward the surface side of the fan-shaped plate 2 and has a flat joint surface at the tip. , and an annular second coupling protrusion 8 that protrudes toward the back side of the fan-shaped plate 2 at the peripheral edge of the first protrusion 7 and has a flat joint surface at the tip. A connecting rod insertion hole 9 is bored.

Then, the first convex portions 7, 7 and the second convex portions 8.8 of the connecting portions 6.6 of the fan-shaped plates 2 that oppose each other are butted against each other, and are connected to the through holes 9 of each connecting portion 6 (not shown). A rod is inserted through all the fan-shaped plates 2.

Each fan-shaped plate 2 has a cross-sectional corrugated shape in order to increase the contact surface area, except for the approximately U-shaped hollow convex portion 3, the connecting flat portion 4 and the connecting portion 6.

Note that illustration of this waveform pattern is omitted in FIGS. 1 and 4.

Furthermore, flat connecting surfaces are provided on both side edges of each fan-shaped plate 2, and a circular rotating contact plate 1 is formed by sequentially connecting the connecting surfaces 10 of adjacent fan-shaped plates 2. There is.

The rotating contact plate 1 is attached to the rotating shaft 16, and its lower half is immersed in the wastewater to be treated in the aeration tank 17 (fifth
(see figure).

When air is ejected from the aeration pipe 18 at the bottom of the aeration tank 17, air bubbles are released into the downwardly opened air bubble storage sections 5a and 5 between the rotary contact plates 1 located above the aeration pipe 18.
b1 and the bubble containing portions 5c and 5d inside each hollow convex portion 3
The rotating contact plate 1 is rotated by its buoyancy.

FIG. 6 shows various modifications of the first embodiment.

First, in the first modified example shown in FIG.

On the other hand, the first rotary contact plates 11a of the force are arranged in two rows of approximately U
The first fan-shaped plates 12a each having a hollow convex portion 13 are connected and stacked one after the other, and the other second rotary contact plate 11
b is obtained by sequentially connecting second fan-shaped plates 12b having substantially U-shaped hollow convex portions 13 arranged in three rows.

Both rotary contact plates 11a and llb are alternately stacked on top of each other, and their approximately U-shaped hollow convex portions 13 are arranged at different positions, and the top surfaces of these convex portions 13 face each other to form a rotary contact plate. By being joined to the joining flat portions 14 of the plates 11a and llb, the rotating contact plate 11at
llb are integrally connected to each other, and a bubble accommodating part 15 surrounded by a substantially U-shaped hollow convex part 13 is formed between them, and the inside of the hollow convex part 13 is connected to the bubble accommodating part 15.
It is considered as a.

Next, in the second modification of the same figure, the rotating contact plate 2
1a and 21b are respectively formed by a first fan-shaped plate 22a having a small substantially U-shaped hollow convex portion 23a and a second sector-shaped plate 22b having a large substantially U-shaped hollow convex portion 23b. As in the case, the approximately U-shaped hollow convex portions 23a and 23b are connected to the rotating contact plates 21a and 2, respectively.
The difference from the first embodiment is that three rows are provided in each column 1b.

Note that 25a and 25b are approximately U-shaped hollow convex portions 23at23.
Bubble accommodating portions 25C and 25d surrounded by b are bubble accommodating portions formed inside these hollow convex portions 23a and 24b.

Next, in the third modification shown in FIG.
1 is constituted by a fan-shaped plate 32 having a small approximately U-shaped hollow convex portion 33a and a large approximately U-shaped hollow convex portion 33b protruding in two rows on both the front and back sides, and these rotary contact plates 31 are placed in an overlapping state. By joining both plates 31, bubble accommodating parts 35a and 35b surrounded by substantially U-shaped hollow protrusions 33a and 33b are formed between the two plates 31, and the insides of the hollow protrusions 33a and 33b form bubble accommodating parts 35c and 35.
b.

Next, in the fourth modification shown in FIG. 2, the rotating contact plate 4
1 is made of one type of fan-shaped plate 42 having substantially U-shaped hollow convex portions 43 arranged in two rows, and rotating contact plates 41 facing each other are arranged and joined with a slight deviation from each other. By doing so, a bubble accommodating part 45 surrounded by a substantially U-shaped hollow convex part 43 is formed between the rotating contact plates 41, and the inside of the hollow convex part 43 is filled with the bubble accommodating part 4.
5a.

7 and 8 show a second embodiment of this invention, in which a large number of recesses 66 arranged in two rows are provided in a fan-shaped plate 62 constituting a rotating contact plate 61, and each recess 66 bottom plate 67
A substantially U-shaped hollow convex portion 63 is provided to protrude from the surface of the fan-shaped plate 62.

The circular rotating contact plates 61 formed by these fan-shaped plates 62 are alternately arranged in opposite directions, and the approximately U
The top surface of the hollow convex portion 63 and the bottom wall 67 of the recess 66
By joining the rotary contact plates 61 to each other, the rotary contact plates 61 are integrally connected, and a large number of bubble accommodating portions 65 surrounded by a substantially U-shaped hollow convex portion 63 are formed in the middle of both plates 61. The inside of the hollow convex portion 63 serves as a bubble containing portion 65a.

FIGS. 9 and 10 show a third embodiment of this invention, in which a rotary contact plate 71a is made of a fan-shaped plate 72a having a substantially U-shaped hollow convex portion 73, and a connecting hollow plate is provided in the middle of the plate. A rotary contact plate 71b formed by a fan-shaped plate 72b having a convex portion 76 is interposed, and the connecting hollow convex portion 76
The top surface 77 of the rotating contact plate 71a facing the top surface 77 is approximately U.
The inner wall 78 of the hollow convex portion 73 is joined to the top surface of the substantially U-shaped hollow convex portion 73, and the connecting flat portion 74 around the connecting hollow convex portion 76 of the rotating contact plate 71b facing thereto. By joining these rotary contact plates 71a and 71b together, both plates 71at71b
A bubble containing portion 7 surrounded by a substantially U-shaped hollow convex portion 73 in the middle thereof.
5 is formed, and the insides of the hollow convex portions 73 and 76 serve as bubble containing portions 75 a and 75 b, respectively.

In each of the above-described embodiments, a substantially U-shaped hollow convex portion is used, but it may be any other shape similar to a U-shape, such as a C-shape, a square shape, and a square shape.

In addition, the number of these approximately U-shaped hollow convex portions provided on the fan-shaped plate, and ultimately the rotating contact plate, is arbitrary, but the rotation is caused by the buoyancy of the air accumulated in the bubble containing portion formed by these approximately U-shaped hollow convex portions. It is necessary to provide each rotary contact plate with a sufficient number of contact plates to allow the contact plate to rotate.

In addition, the opening direction and arrangement interval of these approximately U-shaped hollow convex portions must be determined according to the position of the aeration pipe 18 at the bottom of the aeration tank 17. It is sufficient that the air bubble storage section is disposed at least near the outer peripheral edge of the plate and formed between the rotating contact plates so as to open downward at a position above the diffuser pipe in the aeration tank. .

Furthermore, the rotating contact plate is joined to the opposing rotating contact plate via a substantially U-shaped hollow convex portion integrally provided thereon and a connecting hollow convex portion, of which the connecting hollow convex portion is connected to the rotating contact plate. The rotary contact plates may be connected to each other by interposing another spacer instead of providing the rotary contact plates integrally.

Further, in each of the above embodiments, the fan-shaped plate constituting the rotary contact plate is made to have a size one-fourth of a circle, but the size may be arbitrary.

As mentioned above, this device is composed of a plurality of fan-shaped plates made of synthetic resin, and each fan-shaped plate is integrally provided with a large number of approximately U-shaped hollow protrusions that protrude on at least one side. The plates are connected in order to create a circular rotating contact plate, and the plurality of rotating contact plates are stacked on top of each other, and the top surface of each approximately U-shaped hollow protrusion is joined to the opposing rotating contact plate. As a result, a large number of bubble containing sections are formed between adjacent rotating contact plates, surrounded by substantially U-shaped protrusions, and opening downward at a position above the aeration pipe at the bottom of the aeration tank. Since the inside of the letter-shaped hollow convex portion serves as a bubble containing portion, the volume of the bubble containing portion formed in the middle of the rotating contact plate is very large, and air is easily caught in the aeration tank 17.

In addition, simply by combining and joining the rotary contact plates, it is possible to form such a large-volume air bubble storage section between the rotary contact plates, which greatly simplifies the manufacture of the rotary contact plates and, by extension, the sewage treatment equipment. can be carried out efficiently.

In addition, the fan-shaped plate having a large number of approximately U-shaped hollow convex parts can be easily made from a thin synthetic resin plate by vacuum forming, for example, and the amount of material used is extremely small. Manufacturing costs are very low.

Furthermore, since the top surface of the approximately U-shaped hollow convex portion of each rotating contact plate is joined to the opposing rotating contact plate, the rotating contact plate in the superposed state has a very high strength as a whole, and therefore has a long-term lifespan. It has the effect of being able to withstand use.

[Brief explanation of the drawing]

The drawings show various embodiments of this invention. Fig. 1 is a partial front view of the first embodiment, Fig. 2 is an enlarged sectional view taken along the line ■-■ of Fig. 1, and Fig. 3 is a cross-sectional view of Fig. 1. Fig. 4 is a partially enlarged perspective view of Fig. 1; Fig. 5 is a cross-sectional view of the rotary contact plate of the first embodiment attached to the aeration tank;
6 is a schematic sectional view showing various modifications of the first embodiment, FIG. 7 is a schematic sectional view of the second embodiment, FIG. 8 is an enlarged perspective view of the same portion, and FIG. 9 is a schematic sectional view of the third embodiment. FIG. 10 is a partially enlarged perspective view of the third embodiment, showing a state before the rotating contact plate is joined. 1, la, lb, 11. lla, llb, 21at
21b, 31, 41, 61, 71a, 71b1166 rotating contact plate, 2, 2a, 2b9 12? 12at1
2b=22a, 22b, 32? 42,62-
72 a, 72 b...Sector plate, L 3a, 3b
, 13-23a, 23b, 33a, 33b, 43, 63
゜73--Approximately U-shaped protrusion, 5a, 5b, 5c,
5d. 15.15a, 15b, 25a, 25b, 25Ct
25d, 35a, 35b, 35c, 35d. 45.45a, 65, 65a, 75, 75a, 75b・
...Bubble storage section.

Claims (1)

[Scope of utility model registration request] It is composed of a plurality of fan-shaped plates made of synthetic resin, and each fan-shaped plate is integrally provided with a large number of approximately U-shaped hollow protrusions that protrude from at least one side of the plate, and these fan-shaped plates are connected to create a circular rotation. A contact plate is made, a plurality of rotating contact plates are stacked on top of each other, and the top surface of each approximately U-shaped hollow convex portion is joined to the opposing rotating contact plate, so that adjacent rotating contact plates are connected to each other. A large number of air bubble accommodating parts are formed in the middle between the approximately U-shaped hollow protrusions and open downward at a position above the aeration pipe at the bottom of the aeration tank, and the inside of each approximately U-shaped hollow protrusion contains air bubbles. Rotary contact plate in rotary sewage treatment equipment, which is used as part of the rotary sewage treatment system.