JPH0947754A - Discharge device of waste water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge suspended materials or precipitates coexisted in a flow-in waste water without remaining in a vessel in a device for pumping up and discharging the waste water flowing in the vessel by alternately driving an internal pump. SOLUTION: A main inner vessel 4a and a spare inner vessel 4b are recessedly provided in the bottom part of an outer vessel 1 into which the waste water flows, a flow-in passage 6 running from the outer vessel 1 to the main inner vessel 4a and a circulating groove 5 communicating between both inner vessels 4a and 4b are cuttingly provided and the suction port 8 of the pumps 7 housed with the discharge ports connected to a pump-up pipe 3 introduced to the outside of the outer vessel 1 is opened to the lower part of the main inner vessels 4a. This discharge device is constituted so that the level of the spare inner vessel 4b is lowered simultaneously with the level of the main inner vessel 4a and swirling flow is formed and amplified in the main inner vessel 4a at the time of driving the pump 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste water discharge device in which suspended solids and sediments are mixed.

[0002]

2. Description of the Related Art Conventionally, a waste water discharge device has a pump provided below a storage tank having a waste water inlet opening to the inside of the tank and a waste water pumping pipe extending to the outside of the tank. When the wastewater flowing into the storage tank from the inlet reaches the specified upper limit water level, the pump is activated to pump the wastewater out of the storage tank to the outside and the water level reaches the specified lower limit water level. Then stop the pump.

However, many floating substances and precipitates are mixed in industrial wastewater and domestic wastewater.

In the flow of water sucked by the pump in the storage tank, only solid matters around the suction port are removed, and most of suspended solids and precipitates remain without being discharged. for that reason,
The rotten scum gives off gas, causing a stench around the area. Further, due to the gradual increase of the residual deposit, the pump suction port is closed and the pumping function is impaired.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an effective device capable of sucking and discharging wastewater together with wastewater by a pump without leaving suspended matters and precipitates mixed in the wastewater.

[0006]

According to the present invention, there is provided a waste water discharge device mainly comprising a waste water inlet opening to the inside of the tank and a bottom bottom portion of an outer tank having a waste water pumping pipe extending to the outside of the tank. An inner tank and a spare inner tank are arranged, a pump is housed so that the suction port is opened to the lower part in the main inner tank, and the discharge port is connected to the waste water pumping pipe, and the lower bottom part in the outer tank is arranged. An inflow path leading from the above to the main inner tank is provided, and by a flow groove leading from the side groove vertically provided along one side of the peripheral wall of the auxiliary inner tank to the side groove vertically provided along one side of the peripheral wall of the main inner tank. By connecting the tanks in the above quantity,
The suction and discharge action of the waste water accompanying the driving of the pump in the main inner tank causes the waste water inflow action from the preliminary inner tank to the main inner tank to form and amplify the swirl flow in the main inner tank, and The duration was increased and the water level in the preliminary inner tank was lowered in synchronization with the water level in the main inner tank.

[0007]

Embodiments will be described below with reference to the drawings of the embodiments.

Reference numeral 1 denotes an outer tank into which waste water flows in, which has a waste water inlet 2 opened to the inside of the tank and a waste water pumping pipe 3 extended to the outside of the tank. A main inner tank 4a and a spare inner tank 4b are formed in a concave shape, and a peripheral wall of the main inner tank 4a is formed in a slant-like inclined surface having a large diameter in the upper part and a small diameter in the lower part.
5a is a side groove vertically provided along one side of the peripheral wall of the main inner tank 4a, 5b is a side groove vertically provided along one side of the peripheral wall of the auxiliary inner tank 4b, and 5 is each of these both side grooves 5a, 5b. The inner tanks 4a, 4 are guided by extending in a direction opposite to the rotation direction of the pump.
It is a flow groove for communicating b. Reference numeral 6 denotes an inflow path leading from the lower bottom portion of the outer tank 1 to the main inner tank 4a. In the drawings of the embodiment, a downward slope is provided from the lower bottom portion of the outer tank 1 to the main inner tank 4a, and the rotation of the pump is increased. It is a mode in which it is guided in the direction opposite to the direction. Reference numeral 7 is an underwater sewage pump housed so that a suction port 8 is opened to the lower part in the main inner tank 4a, and its discharge port 9 is detachably connected to the waste water pumping pipe 3. Reference numeral 10 is a lifting guide used when the submersible waste pump 7 is attached and detached, and 11 is a scattering prevention cover attached near the opening of the wastewater inlet 2.

[0009]

When the inside of the outer tank 1 rises to a predetermined starting water level due to the inflow of waste water, the submersible waste material pump 7 is activated to start pumping and discharging the waste water. Main inner tank 4a
After the water level reaches the upper edge, the wastewater in the main inner tank 4a will be pumped and discharged. The pumping and discharging action of the pump 7 causes the waste water in the main inner tank 4b to flow from the inside of the auxiliary inner tank 4b through the circulation groove 5 into the main inner tank 4b. Since a wastewater inflow action into the tank 4a occurs, the water level in the preliminary inner tank 4b begins to drop in synchronization with the water level in the main inner tank 4a.
Further, the swirling flow is formed and amplified in the main inner tank 4a by the action of inflowing the wastewater through the circulation groove 5, and the wastewater swirls up from the peripheral portion along the slant-shaped inclined surface and descends from the central portion. A convection effect is generated, and therefore, suspended solids and precipitates in the wastewater are strongly stirred and sucked through the pump suction port 8. Then, when the water level in both inner tanks 4a and 4b reaches a predetermined stop water level near the tank bottom, the submersible waste pump 7 is stopped. During this time, not only the waste water in the main inner tank 4a but also the waste water in the preliminary inner tank 4b is pumped and discharged through the circulation groove 5. This is just a spare inner tank 4
It does not mean that waste water is not left in b.
That is, the swirl flow forming time is maintained. That is, it means that the stirring time of the suspended matter and the precipitate in the main inner tank 4a is increased accordingly. Therefore, suspended matter and sediment are easily discharged and discharged together with the wastewater, and do not remain in the tank.

[0010]

According to the apparatus of the present invention, the swirling flow is formed and amplified in the main inner tank when the waste water is discharged, and the duration of the swirling flow is increased, so that the stirring action of the waste water is generated and the suspended matter or the sediment is generated. It is effective for pumping and discharging. Therefore, there is an advantage that it is possible to prevent the generation of a bad odor due to the residual scum in the tank, and the accident of blocking the pump suction port due to the deposit.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main part of a device of the present invention.

FIG. 2 is a vertical cross-sectional side view of essential parts in a state in which an internal pump is removed from the device of the present invention.

FIG. 3 is a cross-sectional plan view of essential parts in a state where an internal pump is removed from the device of the present invention.

[Explanation of symbols]

 1 Outer Tank 2 Waste Water Inlet 3 Waste Water Pumping Pipe 4a Main Inner Tank 4b Spare Inner Tank 5 Distribution Groove 5a Side Gutter Vertically Installed in Main Inner Tank 5b Side Gutter 6 Inlet Channel 7 Pump 8 Pump Suction port 9 Pump discharge port

Claims (1)

[Claims] The main inner tank and the auxiliary inner tank are arranged in the lower bottom part of the outer tank having the waste water inlet opening to the inside of the tank and the waste water pumping pipe guided to the outside of the tank. The pump is housed so that the suction port is opened to the lower part, and its discharge port is connected to the wastewater pumping pipe, and an inflow path leading from the lower bottom part in the outer tank to the main inner tank is provided. A pump in the main inner tank that communicates between the above quantity inner tanks by a flow groove that leads from the side groove that is vertically provided along one side of the peripheral wall to the side groove that is vertically provided along one side of the peripheral wall of the main inner tank. The suction and discharge action of the waste water associated with the driving causes a waste water inflow action from the preliminary inner tank to the main inner tank to form and amplify the swirl flow in the main inner tank and increase the duration of the swirl flow. And, the discharge of wastewater is characterized in that the water level in the preliminary inner tank is configured to decrease in synchronization with the water level in the main inner tank. Location.