JP2001241067A - Treated water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treated water supply system which can prevent corrosion of a pump, and facilitates supplement of bactericides. SOLUTION: Rainwater flows from a yard catch basin 3 with a trap into a settling tank 11 of a water storage tank 10, and flows over a partition wall 14 into a main tank 13. When a pump 33 is driven, water in the main tank 13 is fed via arranged pipes 31, 34. When the water flows in the arranged pipe 34, a float valve 47 of a bactericide supply vessel 40 lowers, whereby a bactericide solution in a bactericide chamber 42 is supplied via a valve chamber 43 and a solution feeding port 48 into the arranged pipe 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage system for utilizing sewage such as rainwater or bathtub drainage as water for sprinkling or toilets, and more particularly to an sewage system with an improved disinfectant addition mechanism.

[0002]

2. Description of the Related Art In a sewage system in which sewage such as rainwater is stored in a storage tank and is supplied to a demand destination such as a water faucet or a low tank of a toilet by a pump, the sewage needs to be sterilized. Conventionally, as this sterilizing means, an electrolytic sterilizing device or a solid sterilizing agent (for example, a hypochlorous acid-based drug) has been used.

The former electrolytic sterilizer is expensive and uses a solid sterilizer when low cost is required. The solid germicide is disposed in the storage tank of the intermediate water so as to be in contact with the inflow water. This solid disinfectant is replenished by opening the manhole cover of the storage tank.

[0004]

When a bactericide is added to the water in the storage tank, the pump is contacted with the germicide component from the storage tank where the water containing the germicide is sent from the storage tank to a demand destination. And may corrode. In particular, when the middle water stays in the storage tank for a long time, the disinfectant deliquesces, or drops into the middle water by contact with the coagulated water,
When the concentration of the disinfectant in the middle water is high, the pump is likely to be corroded. Furthermore, when replenishing the disinfectant into the storage tank, it is necessary to open the manhole cover, which is troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem and to provide an underground water facility in which corrosion of a pump is prevented and a disinfectant can be easily replenished.

[0006]

According to the present invention, there is provided an intermediate water facility having a storage tank for storing the intermediate water, and a pump and a pipe for supplying the intermediate water in the storage tank to a demand destination.
A disinfectant additive is provided downstream of the pump.

[0007] In such a drainage system of the present invention, since the disinfectant additive is provided downstream of the pump, the pump is prevented from being corroded by the disinfectant components. Further, the disinfectant additive can be installed on the ground or on the ground surface, and replenishment of the disinfectant is easy.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of the middle water facility according to the embodiment. In this embodiment, rainwater is used as the intermediate water, but bathtub drainage or sewage treatment water may be used.

The rainwater that has fallen on the roof 1 or the like flows into a rainwater basin 3 with a trap from a gutter or the like via a rainwater inflow pipe 2.
When the water level in the rain basin 3 with a trap becomes a predetermined value or more, such as when the amount of rainfall is large, excess rainwater is discharged from the rainwater outflow pipe 4.

The rainwater in the rainwater basin 3 flows into the storage tank 10 via the pipe 5. In the storage tank 10, partition walls 14, 1
5 separates a sedimentation tank 11, a water tank 12 and a main tank 13. Rainwater from the pipe 5 flows into the sedimentation tank 11,
Solids such as mud and gravel are settled and separated. The supernatant of the rainwater in the sedimentation tank 11 overflows the partition wall 14 and flows into the main tank 13. The main tank 13 is provided with a level switch 16 and a strainer 30 at the lower end of the water supply pipe 31.
Is arranged.

Water can be introduced into the water tank 12 through a water pipe 20, a hopper 22, and a water supply pipe 23 provided with a solenoid valve 21. When the level switch 16 detects that the water level in the main tank 13 has fallen below the set water level, the controller 24 opens the solenoid valve 21 based on a signal from the level switch 16 and cleans water. The water is supplied to the water tank 12.

The water in the water tank 12 overflows the partition wall 15 and flows into the main tank 13. When the water level in the main tank 13 rises to the set water level, the solenoid valve 21 closes.

The water in the main tank 13 is supplied to a water faucet, a low tank of a toilet, and the like via a strainer 30, a pipe 31, a sand remover 32, a pump 33, and a pipe 34. This pipe 3
4 is provided with a disinfectant adder 40.

The disinfectant additive unit 40 is detachably mounted on a container 44 having a horizontal wall 41 partitioned into an upper disinfectant chamber 42 and a lower valve chamber 43, and an upper part of the disinfectant chamber 42. It has a lid 45 mounted, an opening 46 provided in the horizontal wall 41, and a float valve 47 arranged in the valve chamber 43. Although not shown, the cover 45 is provided with a small hole for ventilation.

The lower portion of the container 44 communicates with the inside of the pipe 34 via a liquid inlet 48.

The float valve 47 floats by its buoyancy and comes into close contact with the horizontal wall 41 from below, and closes the opening 46.

When the pump 33 is started and water flows into the pipe 34, a negative pressure is generated in the vicinity of the liquid inlet 48 by a venturi action, and water in the valve chamber 43 is sucked into the pipe 34. Then, the water pressure in the disinfectant chamber 42 is increased by the float valve 4.
7, the float valve 47 is separated from the horizontal wall 41, and the opening 46 is opened. Then, the disinfectant dissolving water stored in the disinfectant chamber 42 is added to the water in the pipe 34 through the opening 46, the valve chamber 43, and the liquid inlet 48.

When the pump 33 stops, the water in the pipe 34 flows into the valve chamber 43 from the liquid inlet 48. Then, before the float valve 47 comes into contact with the horizontal wall 41, water passes through the opening 46 and flows into the sterilizing agent chamber 42.

In addition, a flow path communicating the valve chamber 43 and the germicide chamber 42 is provided, and a water level responsive valve for flowing water into the germicide chamber 42 so that the water level in the germicide chamber 42 becomes a predetermined water level. Etc. may be provided.

The water that has flowed into the disinfectant chamber 42 is disinfectant A
And dissolves in disinfectant. This disinfectant solution is
When the pump 33 is driven next time, it is added into the pipe 34.

In the municipal water system constructed as described above, since the disinfectant additive 40 is provided downstream of the pump 33, the pump 33 is reliably prevented from being corroded by the disinfectant components. Is done. Further, by opening the lid 45, the disinfectant A can be easily replenished to the disinfectant adder 40.

In the above embodiment, the addition of the disinfectant is controlled by the float valve 47. Instead of the float valve 47, an electromagnetic valve that opens and closes in conjunction with the driving and stopping of the pump 33 and an electric motor A valve may be provided in the disinfectant additive.

[0023]

As described above, the sewage system of the present invention prevents corrosion of the pump and is excellent in durability. It is also easy to replenish the germicide.

[Brief description of the drawings]

FIG. 1 is a system diagram of an underground water facility according to an embodiment.

[Explanation of symbols]

 3 Rainwater basin with trap 10 Storage tank 11 Settling tank 12 Water tank 13 Main tank 21 Solenoid valve 30 Strainer 33 Pump 40 Disinfectant adder 41 Horizontal wall 42 Disinfectant chamber 43 Valve room 44 Container 45 Cover 46 Opening 47 Float valve 48 Injection mouth

Claims (2)

[Claims] 1. A sewage system having a storage tank for storing sewage, a pump and piping for sending the sewage in the storage tank to a demand destination, wherein a disinfectant additive is provided downstream of the pump. Medium-water facilities characterized by being installed. 2. The disinfectant additive according to claim 1, wherein the disinfectant adder comprises a container for holding a disinfectant solution, and a valve provided between the container and a water supply pipe. An underground water facility, which is opened when the underground water flows in the underground water supply pipe.