JPH0123193B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a septic tank with a built-in sedimentation tank. A hopper-type settling tank 2 is built in between the end wall 13 of the housing 1, and the bottom of the settling tank 2 is closely fixed to the bottom wall of the housing 1. This relates to a septic tank with a built-in sedimentation tank, which is characterized by forming an annular sterilization tank 3 with the following.

In conventional septic tanks with a built-in sedimentation tank, since the sedimentation tank 2' has a hopper shape, there is a problem in that there is wasted space around the sedimentation tank 2', making the septic tank A' larger. In order to improve the digestion efficiency of the sterilization tank, there is a problem in that separate parts such as a butthole are required, which increases the cost.

The present invention has been made in view of the above points, and its purpose is to effectively utilize the space around the sedimentation tank as a disinfection tank, to make the septic tank more compact, and to remove parts of the disinfection tank. To provide a septic tank with a built-in sedimentation tank that can reduce the number of points and has high disinfection efficiency.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

The septic tank A is formed by incorporating a sedimentation tank 2, a disinfection tank 3, an aeration tank (not shown), etc. in a horizontal cylindrical housing 1 with both ends closed. Housing 1
The sedimentation tank 2, etc. are made of FRP or the like. The settling tank 2 is formed in a hopper type, and an overflow part 4 is provided in the center of the settling tank 2. Although the illustrated settling tank 2 has a rectangular planar cross section, it may have a round cross section.
The bottom of the settling tank 2 is tightly fixed to the bottom wall of the housing 1. In this way, a partition wall 5 is formed near the sedimentation tank 2 built into the housing 1.
The entire circumference outer wall surface of the settling tank 2 and the end wall 13 of the housing 1
An annular disinfection tank 3 is formed between the inner wall surface including the partition wall 5 and the partition wall 5. 6 is overflow part 4
This is a connecting pipe that connects the disinfection device 7 to
The water flows from the sterilizer through the sterilizer 7 into the sterilizer tank 3. The disinfection device 7 is composed of a disinfectant storage cylinder 8 and a contact box 9 for bringing the disinfectant and separated water into contact. The communication pipe 6 is directly connected to the contact box 9, and the separated water comes into contact with the disinfectant in the contact box 9, and then passes through the contact box 9.
It is designed to flow into the disinfection tank 3 from an inlet 10 of the disinfection tank 3. Reference numeral 11 denotes a drain port located behind the inlet 10, and a wall 12 is provided between the inlet 10 and the drain port 11. Therefore, the separated water that flows into the disinfection tank 3 from the inlet 10 goes around the sedimentation tank 3 approximately once as shown by the arrow, mixes sufficiently with the disinfectant it comes into contact with, and is sterilized. It is drained. Figure 4 shows sedimentation tank 2 of separated water.
It shows the flow inside. First, the sewage flowing from the aeration tank through the transfer pipe 15 and the central vertical pipe 16 is separated in the sedimentation tank 2, and then the annular jam plate 17
Separated water overflows into an annular overflow part 4 formed on the inner periphery of the pipe, and is then discharged from a communication pipe 6.

As described above, the present invention has a transverse cylindrical housing that closes both ends, and a part near the end of the housing is partitioned by a partition wall, and a hopper type sedimentation tank is built in between the partition wall and the end wall of the housing. The bottom of the tank is tightly fixed to the bottom wall of the housing, and the outer peripheral wall of the sedimentation tank, the inner peripheral wall of the housing, and the partition wall form an annular disinfection tank, so there is no wasted space around the sedimentation tank, making it effective as a disinfection tank. This makes it possible to make the septic tank more compact, and since the sterilization tank is formed using the outer wall of the sedimentation tank and the inner wall of the housing, the number of parts is reduced, and the sterilization tank is annular. This has the advantage of ensuring a long flow path and increasing disinfection efficiency. Furthermore, since the area around the sedimentation tank is filled with purified water, there is an advantage that the pressure of the sediment and the purified water cancel each other out, so that the sedimentation tank does not require much strength and can be manufactured at a low cost.

[Brief explanation of drawings]

Figures 1a and b are front sectional views and side sectional views of the conventional example, Figure 2 is a perspective view of the sedimentation tank and disinfection tank of the present invention, and Figures 3a and b are front and side views of the same.
FIG. 4 is a sectional view of the same sedimentation tank, in which 1 is a housing, 2 is a sedimentation tank, 3 is a disinfection tank, 5 is a partition wall, and 13 is an end wall.

Claims (1)

[Claims] 1. A part near the end of a horizontal cylindrical housing that closes both ends is partitioned by a partition wall, and a hopper-type sedimentation tank is built in between the partition wall and the end wall of the housing, and the bottom of the sedimentation tank is connected to the bottom wall of the housing. A septic tank with a built-in sedimentation tank, characterized in that the outer peripheral wall of the sedimentation tank, the inner peripheral wall of the housing, and the partition wall form an annular disinfection tank.