JPS5837505Y2 - Septic tank sewage feeder - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sewage supply device that disperses and supplies sewage to the sedimentation separation chamber of a septic tank.

Conventionally, for the purpose of removing solids in sewage 1 (influent sewage), a sewage supply pipe 3 is used to supply the sewage 1 to a sedimentation separation chamber 2, as shown in FIG. 3
The distal end of the wastewater supply pipe 3 may be hung down or bent, or a diffusion plate 4 may be disposed opposite the distal end of the wastewater supply pipe 3, and an inward protruding portion may be provided on the side wall of the sedimentation separation chamber 2. 5 was adopted.

According to the urine and urine septic tank structure standards, the sewage supply pipe 3 and the outflow pipe 6 at the water depth H are supposed to extend to the water depth H.

However, the sewage 1 supplied to the sedimentation separation chamber 2 does not spread much in the sedimentation separation chamber 2, as shown by the arrow a in FIG. It was found that a short circuit flow was generated from the pipe 3 to the outflow pipe 6, and that solid matter in the wastewater was not sufficiently removed.

The object of this invention is to eliminate the above-mentioned drawbacks and to provide a wastewater supply device that can diffusely supply flowing wastewater over a wide area within a sedimentation separation chamber and reliably remove solids from the wastewater.

An embodiment of this invention will be described below with reference to FIGS. 2 to 4.

FIG. 2 is a side view of the sewage supply device according to this invention, FIG. 3 is a front view of the same sewage supply device, and FIG. 4 is a diagram showing the diffusion state of the sewage water.

The sewage supply device 7 according to this invention is attached to the tip of the sewage supply pipe 3 disposed in the sedimentation separation chamber 2 with a fitting part 8, and an inclined part 9 is formed in series with the fitting part 8. has been done.

The inclined portion 9 has both ends thereof cut into an elbow shape, is inclined at a predetermined angle with respect to the moving direction of the waste water 1 flowing through the waste water supply pipe 3, and extends from the fitting portion 8 to the tip. A guide surface 10 is formed that gradually expands in the radial direction.

A plurality of guide protrusions 11 are provided on the inner wall of the guide surface 10 of the inclined portion 9 in a radial direction along the guide surface 10 so as to disperse the wastewater 1 flowing along the guide surface 10 in the radial direction. is installed protrudingly.

The guide protrusion 11 extends from the fitting portion 8 toward the tip.
The height is gradually increased to allow the wastewater 1 to flow through the wastewater guide path 12 separated by the guide protrusions 11 and to be reliably dispersed in the radial direction.

The shape of the sewage supply device 7 includes an inclined portion 9 forming a guide surface 10 that is inclined at a predetermined angle with respect to the moving direction of the sewage 1 flowing in through the sewage supply pipe 3; Any shape may be used as long as there are a plurality of guide protrusions 11 protruding from the inclined portion 9 so as to disperse the wastewater 1 flowing along the sloping portion 10 in the radial direction.

Furthermore, short circuits can be effectively prevented by extending the sewage supply pipe 3 to the vicinity of the center of the sedimentation separation chamber 2 and arranging the opening of the sewage supply device 7 toward the tank wall as shown in FIG. 4.

In this way, the sewage supply pipe 3 can also be inspected through the manhole at the top of the tank.

As described above, according to this invention, the wastewater 1 supplied to the sedimentation separation chamber 2 flows through the wastewater supply pipe 3 and then flows along the guide surface 10 inclined at a predetermined angle as shown in FIG. , 3rd
As shown in the figure, the flow path is changed, and then the guide projections 11 disperse radially over a wide area of the sedimentation chamber 2, as shown in FIG.

Therefore, the wastewater 1 reaches the outflow pipe 6 after a sufficient residence time in the sedimentation separation chamber 2, and solid matter in the wastewater is reliably removed during this time.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical cross-sectional view of a conventional sewage supply pipe, Fig. 2 is a side view of the sewage supply device according to this invention, Fig. 3 is a front view of the same sewage supply device, and Fig. 4 is a state of dispersion of sewage. Show the diagram. 1... Sewage (inflow sewage), 2... Sedimentation separation chamber, 3... Sewage supply pipe, 6... Outflow pipe, 7... ... Sewage supply device, 8 ... Fitting part, 9 ... Inclined part, 10 ... Guide surface,
11... Guide projection, 12... Sewage guide path.

Claims (1)

[Scope of utility model registration request] A slope that is provided at the tip of a wastewater supply pipe that supplies inflowing wastewater to a sedimentation separation chamber of a septic tank, and that forms a guide surface that is inclined at a predetermined angle with respect to the movement direction of the wastewater that flows in through the wastewater supply pipe. and a plurality of guide protrusions protruding from the inclined part so as to radially disperse the wastewater flowing along the guide surface.