JPS6028560Y2 - Inclination adjustment structure of diffuser pipe for aeration room of septic tank - Google Patents

Description

[Detailed description of the invention] This invention relates to an inclination adjustment structure for an aeration pipe for an aeration room of a septic tank.

Conventionally, in the aeration chamber of a contact aeration type sewage septic tank, an aeration pipe that blows out air in the form of bubbles into the wastewater to be treated is installed, but since this aeration pipe is placed at the bottom of the aeration chamber, water pressure and Depending on the air supply location, so-called one-sided blowing phenomenon tends to occur, which often impedes uniform treatment of wastewater.

In other words, as shown in Fig. 1A, when the aeration pipe A is supplied with air from one side, so-called single-shaped piping, air bubbles are concentrated on the side opposite to the air supply side A1. °
Also, as shown in Figure 1, even in a so-called T-shaped pipe in which diffuser pipes A and A are arranged on both sides of the air supply pipe B, there is a tendency for the part A2. There is a tendency for bubbles to concentrate in A2 and eject.

Therefore, in order to eject air bubbles uniformly along the extending direction of the air diffuser pipe A, it is necessary to tilt the air diffuser pipe A slightly so that the air pressure and water pressure to be supplied are exactly balanced. That's fine, but in the case of the one shown in Figure 1 A,
Adjustment of the inclination of the air diffuser pipe A must be carried out by supporting the root a of the air supply pipe B, which also serves as a support member for the air diffuser pipe A, and since the rotation radius is significantly larger than the angle to be adjusted, very minute adjustments cannot be made. It is difficult, and for what is shown in the opening of Figure 1,
Even if the inclination of the air supply pipe B was adjusted, it was only effective for one side of the air diffuser pipes A and A, so there was a drawback that it was impossible to fundamentally prevent one-sided blowing.

In view of the above, this invention was made for the purpose of providing a structure for adjusting the inclination of the aeration tube, which allows the inclination of the aeration tube to be easily and quickly adjusted in order to uniformly blow out bubbles from the aeration tube. An insertion port extending in the axial direction is formed at the end of the air supply pipe extending toward the bottom surface of the aeration chamber of the septic tank, and an aeration pipe is externally fitted and joined to the insertion port via a bushing. an inner hole axis for receiving the insertion port;
The bushing is characterized in that the outer diameter axis on which the air diffuser pipe is fitted is non-parallel, and the bushing is fitted on the insertion opening so as to be rotatable around the axis. .

This invention will be explained below using examples.

FIG. 2 is a sectional view of an embodiment of this invention.

The inclination adjustment structure of the diffuser pipe for the aeration room of the septic tank of this invention is
An insertion port 3 extending in the axial direction is formed at the end of the air supply pipe 2 extending toward the inner bottom surface of the aeration chamber 1 of the septic tank, and an aeration pipe 5 is externally fitted into this insertion port 3 via a bushing 4. The axis X of the inner hole 4A that is joined and receives the insertion port 3 of this bushing 4, and the outer circumferential surface 4 on which the diffuser pipe 5 of this bushing is externally fitted.
The B outer diameter axis Y is non-parallel as shown in an enlarged view in FIG.
is fitted to be rotatable around the shaft.

In addition, the bushing 4 is made of hard rubber so that it can be fixed when using the bottom plate, and in order to prevent relative rotation with the air diffuser pipe 5,
A flange 4C is formed on the bushing 4, and this flange portion 4
C and the diffuser tube end 5A may be able to engage with each other.

In order to adjust the inclination of the air diffuser using the adjustment structure of this invention, the bush 4 and the air diffuser 5 are rotated around the axis on the insertion port 3.

At this time, since the inner hole axis X and the outer diameter axis Y of the bushing 4 are non-parallel, a so-called oscillating movement occurs corresponding to this angular difference, thereby making it possible to finely adjust the inclination of the diffuser pipe 5. It becomes.

In this case, as shown in Figure 4, the air diffuser 5 is also tilted in the horizontal direction, but since the influence of water pressure on the horizontal tilt can be ignored, it has no effect on the average ejection of bubbles. does not affect

Furthermore, although the above embodiment has been described with respect to an L-shaped side piping, it can be implemented in the same manner as shown in FIG. 5 even with an R-shaped side piping.

Incidentally, the angle of inclination in each figure in the above embodiments is exaggerated for the sake of explanation, and in reality, the angle of inclination between the axes X and Y is approximately 1° to 2°, and at most 5°. It is said that

Since this device is constructed as described above, when adjusting the inclination angle of the air diffuser to equalize the bubble ejection from the air diffuser, the air diffuser itself can be adjusted without adjusting the inclination of the air supply pipe that supports the air diffuser. It has various practical effects, such as being able to make very precise fine adjustments just by slightly rotating it, and being easy to operate.

[Brief explanation of the drawing]

Fig. 1 is a front view of the conventional example, Fig. 2 is a sectional view of the embodiment, Fig. 3 is an enlarged view of the main part of Fig. 2, Fig. 4 is a plan view of the embodiment, and Fig. 5 is a sectional view of the embodiment. FIG. 7 is a front view of another embodiment. 1... Aeration room, 2... Air pipe, 3...
...Insert, 4...Button, 4A...
... Inner hole, 5 ... Diffusion tube, X ... Inner hole axis, Y ... Outer diameter axis.

Claims (1)

[Scope of utility model registration request] An insertion port extending in the axial direction is formed at the end of the air supply pipe extending toward the bottom of the aeration chamber of the septic tank, and an aeration pipe is externally fitted and joined to the insertion port via a bushing. The axis of the inner hole that receives the bushing is non-parallel to the axis of the outer diameter on which the aeration pipe of the bushing is externally fitted, and the bushing is fitted rotatably around the shaft on the insertion opening. A structure for adjusting the inclination of an aeration pipe for an aeration room of a septic tank.