JPS6321557B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air supply device installed in a septic tank to supply air for aeration of raw human waste, etc., which has a particularly high concentration.

Conventionally, as shown in FIGS. 1 and 2, a plurality of air supply pipes 2 are arranged at the inner bottom of a septic tank 1 for human waste, etc., and as shown in FIG. Air was spouted upward from the spout 3. It is desirable that the mound opening 3 be small to some extent in order to reduce bubbles and improve oxidation efficiency, but if it is too small, there is a risk that it will be clogged with solid matter. In particular, during machining, the spout 3
As burrs remain on the inside of the burrs, solid matter gets caught in these burrs, causing blockages in the past.

An object of the present invention is to provide an air supply device for a septic tank for excreta, etc., which not only prevents clogging of the air outlet, but also increases oxidation efficiency, prevents scum generation, and improves aeration efficiency. .

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 3 to 6. This air supply device is installed on a support stand 4 at the inner bottom of a septic tank 1 as shown in FIGS. 3 and 4. is set up. That is, a pair of main pipes 5 of the air supply pipes 2 with both ends closed are hung horizontally, and a plurality of branch pipes 6 are provided to protrude laterally from both sides of the main pipes 5 . Air is supplied to this main pipe 5 via a feed pipe 5a. Each of the branch pipes 6 is connected to the lower part of the circumferential wall of a cylindrical supply cylinder 7 with a bottom that is in an upright position. As shown in FIGS. 5 and 6, the entire upper end surface of this supply cylinder 7 is open, and a circular open hole 8 having a smaller diameter than the upper end opening is provided in the center of the bottom wall. There is.

Now, an air supply pipe 2 is provided at the bottom of the supply cylinder 7.
Air is ejected from the ejection port 6a of the branch pipe 6, and this ejected air collides with the inner surface of the supply cylinder 7 and is decomposed, forming a large number of bubbles and floating from the open upper end of the supply cylinder 7. With this floating, a flow is generated in the supply tube 7 from below through the open hole 8 and upward. At this time, as the air floats, the open hole 8 acts as a throttle, and the upward flow becomes rapid near the open hole 8 and becomes gentle above it. The rapid upward flow near the open hole 8 generates a vortex on the inside of the bottom wall near the open hole 8, and the air ejected from the jet port 6a is pulverized into finer bubbles by the vortex, and the human waste is pulverized into finer bubbles. etc., the contact area becomes larger. Thereafter, these bubbles slowly move along with the gentle upward flow and remain in the human waste for a long time, and the contact with the fine bubbles and the stirring caused by the upward flow combine to cause the human waste to become oxidation efficiency is increased. Therefore, generation of scum is prevented and aeration efficiency is improved. In addition, since the branch pipe 6 is connected to the peripheral wall of the supply cylinder 7 and its jet nozzle 6a is communicated with the inside of the supply cylinder 7, together with the flow generated inside the supply cylinder 7, the jet nozzle 6a
will no longer be clogged with solid matter.

Next, to explain other embodiments, FIGS.
9 and 9, the open hole 8 in the first embodiment is modified, and in the case shown in FIG. 7, the open hole 8 is eccentrically aligned with the lower end surface of the supply tube 7. In the case shown in FIG. 8, a pair of holes are also provided eccentrically, and in the case shown in FIG. 9, they are similarly provided in the form of elongated holes in the circumferential direction.

In another embodiment shown in FIG. 10, a branch pipe 6 is connected substantially tangentially to the peripheral wall of the supply cylinder 7 so that air is blown out along the inner peripheral surface of the supply cylinder 7. This creates a swirling flow inside the supply cylinder 7,
Foam decomposition is promoted.

In another embodiment shown in FIG. 11, both ends of the main pipe 5 of the air supply pipe 2 are opened downward. As a result, solid matter that has entered the main pipe 5 is discharged from this opening by air pressure, thereby preventing clogging in the main pipe 5.

In the installation example shown in FIG. 12, the installation position of the air supply device with respect to the septic tank 1 is changed, and the upward flow in the supply pipe 7 causes the septic tank 1 to
Convection occurs within the septic tank 1 as shown in the direction of the arrow A in the figure, and agitation within the septic tank 1 is promoted.

As detailed above, the air supply device of the present invention has
A bottomed supply cylinder 7 with its entire upper end surface open is erected,
An open hole 8 with a smaller diameter than the upper end open part is formed in the bottom wall thereof, and an air supply pipe 2 is connected to the peripheral wall, and the jet nozzle 6a of the air supply pipe 2 is communicated with the inside of the supply cylinder 7. Since the pipe 2 is connected to the lower part of the circumferential wall of the supply cylinder 7, air bubbles finely crushed by the vortex generated near the open hole 8 and the gentle upward flow generated inside the supply cylinder 7 cause the air inside the septic tank 1 to be It has the effect of increasing the oxidation efficiency of human waste, preventing the generation of scum, and improving the aeration efficiency. Further, there is an effect of preventing clogging of the air outlet 6a.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional air supply device installed in a septic tank, Fig. 2 is a partial sectional view showing the outlet of an air supply pipe, and Fig. 3 is an air supply device according to an embodiment of the present invention installed in a septic tank. 4 is a partial perspective view of the air supply device, FIG. 5 is a partial sectional view of the supply tube, FIG. 6 is a plan view thereof, and FIGS. 7 to 10 are the supply tubes. Fig. 11 is a plan view or sectional view showing another embodiment of the cylinder, Fig. 11 is a partial sectional view showing another embodiment of the main pipe of the air supply pipe, and Fig. 12 shows a change in the installation position of the air supply device with respect to the septic tank. FIG. Septic tank...1, Air supply pipe...2, Main pipe...5, Branch pipe...6, Spout port...6a, Supply pipe...7, Open hole...
8.

Claims (1)

[Scope of Claims] 1. A bottomed supply cylinder 7 with its entire upper end surface open is installed upright, and an open hole 8 with a smaller diameter than the upper end opening is provided in the bottom wall thereof, and an air supply pipe 2 is provided in the peripheral wall. and connect the air outlet 6a of the air supply pipe 2 to the supply cylinder 7.
An air supply device for a septic tank for human waste, etc., characterized in that the air supply pipe 2 is connected to the lower part of the peripheral wall of the supply cylinder 7. 2. The human waste according to claim 1, wherein the air supply pipe 2 is connected in a substantially tangential direction to the peripheral wall of the cylindrical supply cylinder 7 so that air is blown out along the inner peripheral surface of the cylinder. Air supply equipment for septic tanks, etc. 3 The air supply pipe 2 includes a main pipe 5 to which air is supplied and a branch pipe 6 branched from the main pipe 5 and connected to the supply cylinder 7.
The air supply device for a septic tank for human waste, etc., according to claim 1, wherein both ends of the main pipe 5 are opened downward.