JPH0144119B2 - - 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 11 of the housing 1, and the bottom of the settling tank 2 is closely fixed to the bottom wall of the housing 1, so that the outer circumferential wall of the settling tank 2, both inner walls of the housing 1, and the end wall are connected to each other. and partition wall 6
This relates to a septic tank with a built-in sedimentation tank characterized in that a space 7 formed by the above is partitioned by an intermediate partition wall 8 to form a defoaming pump tank 3 and a discharge pump tank 4.

Conventionally, there are a large number of types in which the sedimentation tank is separate from the main body. This is because the sedimentation tank has a special hopper-type shape, so it has a limited capacity when built into the septic tank housing, and is inevitably limited to small tanks, and the effective water depth is shallow, making it impossible to secure the specified water depth. However, in terms of workability, it is far inferior to the built-in type. However, in the case of the conventional septic tank A' with a built-in sedimentation tank, the sedimentation tank 2' is of the hopper type as shown in Figure 1.
If it is assembled into a horizontal cylindrical housing 1', there will be wasted space around the sedimentation tank 2', and the housing 1' itself will become larger, making it impossible to fully utilize the workability of the built-in sedimentation tank. Also, settling tank 2'
Leaving a space around the sedimentation tank 2' increases the strength of the settling tank 2' and increases costs.
Another possibility is to fill the surrounding space with water, but this would require replacing the water to prevent it from rotting, which would be troublesome and increase running costs.

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 defoaming pump tank, etc., to make the septic tank more compact, and to improve construction efficiency. The object of the present invention is to provide a septic tank with a built-in sedimentation tank that can improve transportability.

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

The septic tank A is formed by incorporating a settling tank 2, an antifoaming pump tank 3, a discharge pump tank 4, an aeration tank (not shown), etc. in a horizontal cylindrical housing 1 with both ends closed. For example, the housing 1, settling tank 2, etc.
It is molded from FRP. The settling tank 2 is formed into a hopper type, and an overflow part 5 is installed in the center of the settling tank 2. Although the illustrated sedimentation tank 2 has a rectangular planar cross section,
It may be round. The bottom of the settling tank 2 is tightly fixed to the bottom wall of the housing 1. In this way, the partition wall 6 is formed on the side of the sedimentation tank 2 built into the housing 1, and the entire outer wall surface of the sedimentation tank 2,
A space 7 is formed between both inner wall surfaces of the housing 1 and the end wall 11 and the partition wall 6. Furthermore, this space 7 is partitioned by a middle partition wall 8 and is connected to the defoaming pump tank 3.
and a discharge pump tank 4 are formed. Reference numeral 9 denotes a communication pipe that connects the overflow section 5 and the defoaming pump tank 3. The separated water flowing from the overflow part 5 flows into the defoaming pump tank 3 from the communication pipe 9,
Furthermore, it overflows the defoaming pump tank 3 and flows into the discharge pump tank 4, and is finally drained by the discharge pump 10. FIG. 5 shows the flow of separated water in the settling tank 2. First, the wastewater flowing from the aeration tank through the transfer pipe 15 and the central joint pipe 16 is separated in the settling tank 2, and then flows into the annular overflow part 5 formed on the inner periphery of the annular baffle plate 17. The separated water overflows and is then discharged from the communication pipe 9.

As described above, the present invention incorporates a hopper-type sedimentation tank in a horizontal cylindrical housing that is closed at both ends, and fixes the bottom of the sedimentation tank tightly to the bottom wall of the housing.
The space formed by the outer circumferential wall of the settling tank, the inner walls of the housing, and the end walls is divided by a partition wall to form the defoaming pump tank and the discharge pump tank, so there is no wasted space around the settling tank. The septic tank can be effectively used as a defoaming pump tank and a discharge pump tank, making the septic tank more compact.Also, since the outer periphery of the settling tank is filled with purified water, the strength of the settling tank can be reduced by offsetting the pressure. It has the advantage that it is not required and can be manufactured at low cost.

[Brief explanation of drawings]

FIGS. 1a and 1b are a partial front sectional view and a side sectional view of the conventional example, FIG. 2 is a partially enlarged perspective view of the present invention, and FIG.
The figure is a partial plan sectional view of the same as above, FIGS. 4a and 4b are an overall front view and side view of the same as above, and FIG. 4 is a defoaming pump tank, 4 is a discharge pump tank, 7 is a space, 8 is a partition wall, and 11 is an end wall.

Claims (1)

[Claims] 1. A part near the end of a horizontal cylindrical housing that is closed at 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. The space formed by the outer circumferential wall of the sedimentation tank, the inner walls of the housing, the end walls, and the partition wall is partitioned by a middle partition wall to form a defoaming pump tank and a discharge pump tank. A septic tank with a built-in sedimentation tank.