JP3751335B2 - Waste water discharge device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for discharging waste water in which suspended matter and sediment are mixed.
[0002]
[Prior art and its problems]
Conventionally, a wastewater discharge device stores a pump in a lower part of a storage tank having a wastewater inlet opened into the tank and a wastewater pumping pipe led out of the tank, and stored from the inlet. When the waste water flowing into the tank reaches a predetermined upper limit water level, the pump is activated to lift and discharge the waste water in the storage tank to the outside, and when the water level reaches a predetermined lower limit water level, the pump is stopped.
[0003]
However, many suspended matters and sediments are mixed in industrial wastewater and domestic wastewater.
[0004]
The pump suction water flow in the storage tank only removes solid matter around the suction port, and most of the suspended matter and sediment remain without being discharged. As a result, the spoiled scum generates gas and a bad odor drifts around. Moreover, due to the gradual increase of the residual deposit, the pump suction port is closed and the pumping function is impaired.
[0005]
OBJECT OF THE INVENTION
An object of the present invention is to provide an effective device that can be sucked and discharged by a pump together with waste water without leaving floating matters and precipitates mixed in inflow waste water.
[0006]
[Structure of the invention]
In the wastewater discharge apparatus according to the present invention, the main inner tank and the spare tank are disposed in the lower bottom portion of the outer tank having the wastewater inlet opening into the tank and the wastewater pumping pipe extended to the outside of the tank. A tank is installed, the pump is accommodated only in the main inner tank , 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. An inflow passage that leads from the bottom to the main inner tank is provided, and is circulated between the bottom of the main inner tank and the spare inner tank by a communication hole that is drilled so as to extend in the direction opposite to the rotation direction of the pump , The waste water suction and discharge action of the pump in the main inner tank causes the waste water inflow action from the preliminary inner tank to the main inner tank, and the swirling flow is formed and amplified in the main inner tank. The duration is increased, and the water level in the auxiliary inner tank is lowered in synchronization with the water level in the main inner tank. It was.
[0007]
【Example】
Hereinafter, description will be made with reference to the drawings of the embodiments.
[0008]
Reference numeral 1 denotes an outer tank into which waste water flows, and has a waste water inlet 2 that opens toward the inside of the tank and a waste water pumping pipe 3 that extends toward the outside of the tank. The inner tub 4a and the spare inner tub 4b are recessed, and the main inner tub 4a has a bowl-shaped inclined surface having a large diameter at the top and a small diameter at the bottom. The bottoms of the inner tanks 4a and 4b are communicated with each other through a communication hole 5 that is perforated so as to be led in a direction opposite to the rotational direction of the pump. 6 is an inflow passage from the lower bottom portion in the outer tub 1 to the main inner tub 4a, and in the drawing of the embodiment, a downward slope is given from the lower bottom portion in the outer tub 1 to the bottom of the main inner tub 4a; It is the aspect extended in the direction opposite to the rotation direction of a pump. 7 is an underwater filth pump accommodated so that the suction port 8 is opened to the lower part in the main inner tank 4a. Reference numeral 10 denotes an elevating guide used when the submersible filth pump 7 is attached and detached, and 11 denotes a scattering prevention cover attached near the opening of the wastewater inlet 2.
[0009]
[Action]
When the inside of the outer tub 1 rises to a predetermined startup water level due to the inflow of wastewater, the underwater filth pump 7 is started and the discharge and discharge of wastewater is started. After the pumping and discharging work proceeds and the water level reaches the upper edge of the main inner tank 4a, the waste water in the main inner tank 4a is pumped and discharged. because from the tank bottom in the preliminary tank 4b produces a waste water inflow effect on the communicating hole 5 through the main tank in 4a, the water level in the preliminary tank 4b without leaving precipitate and the water level in the main tank 4a It begins to decline in sync. This water level synchronization action is not different from the case where the submersible waste pump is also housed in the auxiliary inner tank 4b. Then , a swirl flow is formed and amplified in the main inner tank 4a by the waste water inflow action through the communication hole 5, and the waste water swirls ascends from the peripheral portion along the sloping bowl-shaped inclined surface and descends from the central portion. A convection effect is produced, so that suspended matter and sediment in the wastewater are sucked from the pump suction port 8 while being vigorously stirred. And when the water level in both the inner tanks 4a and 4b reaches the predetermined stop water level near the tank bottom, the underwater filth pump 7 stops. During this time, not only the waste water in the main inner tank 4 a but also the waste water in the spare inner tank 4 b without a pump is pumped and discharged through the communication hole 5. This does not simply mean that waste water does not remain in the auxiliary inner tank 4b. Accordingly, the formation time of the swirl flow is maintained. That is, the stirring time of the suspended matter and the precipitate in the main inner tank 4a is increased accordingly. Therefore, suspended matters and sediments are easily pumped and discharged together with the waste water and do not remain in the tank.
[0010]
【The invention's effect】
According to the apparatus of the present invention, in the wastewater drainage apparatus in which the main inner tank and the spare inner tank are arranged in the lower bottom portion of the outer tank and the pump is mounted only on the main inner tank, the wastewater is discharged by driving the pump. Sometimes the waste water in the auxiliary inner tank can be sucked up and discharged at the same time with the waste water in the main inner tank, so that sediment does not accumulate in the auxiliary inner tank, and the swirl flows in the main inner tank. Is amplified and the duration thereof is increased, so that the stirring action of the wastewater is generated, which is effective for the lifting and discharging of suspended matter and sediment. Therefore, there is an advantage that generation of malodor caused by residual scum in the tank and blockage of the pump suction port due to deposits can be prevented.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional front view of a main part of the device of the present invention.
FIG. 2 is a longitudinal side view of a main part of the device of the present invention.
FIG. 3 is a cross-sectional plan view of a main part in a state where an internal pump is removed from the device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer tank 2 Waste water inlet 3 Waste water pumping pipe 4a Main inner tank 4b Preliminary inner tank 5 Communication hole 6 Inflow path 7 Pump 8 Pump suction port 9 Pump discharge port

Claims (1)

A main inner tank and a spare inner tank are arranged at the lower bottom of the outer tank having a waste water inlet opening toward the tank and a waste water pumping pipe led to the outside of the tank, and only in the main inner tank . A pump is accommodated and 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 an inflow passage leading from the lower bottom part in the outer tank to the main inner tank is provided. The waste water accompanying the drive of the pump in the main inner tank is provided and circulated between the bottom of the main inner tank and the spare inner tank through a communication hole drilled to extend in the direction opposite to the rotation direction of the pump. The suction and discharge action causes the waste water inflow action from the auxiliary inner tank to the main inner tank to form and amplify the swirling flow in the main inner tank and increase the duration of the swirling flow. An apparatus for discharging waste water, characterized in that the water level in the tank is lowered in synchronization with the water level in the main inner tank.

Images