JP3751333B2 - 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]
Alternate operation of two pumps with two inner tanks recessed in the lower bottom of the outer tank into which the wastewater flows, and the suction port led to the lower part of the inner tank and the discharge port directed upward Thus, the above-mentioned inflow wastewater is lifted and discharged widely.
[0003]
However, many suspended matters and sediments are mixed in industrial wastewater and domestic wastewater.
[0004]
Even if the inside of the outer tank rises to a predetermined starting water level due to the inflow of waste water, the first pump is activated and the pumping discharge proceeds, and the water level in the first inner tank drops to the stop water level near the bottom. The waste water remains in the second inner tank. Also, even in the first inner tank where the pump is pumped and discharged, the pump suction water flow only eliminates solids around the suction port, and most of the suspended matter and sediment are discharged. It remains without. 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, two inner tanks are provided at the bottom of the outer tank having a wastewater inlet opening into the tank and a wastewater pumping pipe led out of the tank. The two pumps are respectively accommodated so that the suction ports are opened to the lower parts in the inner tanks, the discharge ports of the pumps are connected to the waste water pumping pipes, and the bottoms in the outer tanks are connected. An inflow passage that leads to one or both of the inner tanks is provided and distributed between the bottoms of the two inner tanks through a communication hole that is drilled so as to extend in the direction opposite to the rotation direction of the pump , The suction and discharge action of waste water accompanying the pump drive in one inner tank causes the waste water inflow action from the other pump stop side inner tank to the pump drive side inner tank, and the swirl flow is formed and amplified in the inner tank. And the duration of the swirl flow is increased, and the pump stop side inner tank Water level configured to decrease in line with the water level of the pump drive side the tank.
[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 individual inner tanks 4a and 4b are recessed. These two inner tanks 4a and 4b have a bowl-shaped inclined surface having a large diameter on the upper side and a small diameter on the lower side, and the space between the bottoms of both inner tanks 4a and 4b is in a direction opposite to the rotational direction of the pump. The communication hole 5 is perforated so as to be extended. Reference numeral 6 denotes an inflow passage that leads from the outer tank 1 to one or both of the inner tanks 4a and 4b. In the drawing of the embodiment, a downward slope from the lower part in the outer tank 1 to the tank bottoms in the inner tanks 4a and 4b. And is extended in the direction opposite to the rotation direction of the pump. 7a is a submersible waste pump accommodated so that the suction port 8 is opened to the lower part in one inner tank 4a, and 7b is accommodated so that the suction port 8 is opened to the lower part in the other inner tank 4b. In each of the submersible waste pumps, the discharge port 9 is detachably connected to the waste water pumping pipe 3. Reference numeral 10 denotes an elevating guide used when the submersible waste pumps 7a and 7b are 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 first pump 7a is started and the discharge and discharge of wastewater is started. After the pumping operation has progressed and the water level has reached the upper edges of the inner tanks 4a, 4b, the waste water in the first inner tank 4a is pumped and discharged. This first pump 7a As a result of the pumping and discharging action of the waste water, the waste water inflow action from the bottom of the second inner tank 4b to the first inner tank 4a through the communication hole 5 is produced, so that the second inner tank is left without any deposits remaining. The water level in 4b begins to fall in synchronization with the water level in the first inner tank 4a. In addition, a swirl flow is formed and amplified in the first inner tank 4a by the waste water inflow action through the communication hole 5, and the waste water swirls up from the peripheral part along the sloping bowl-shaped inclined surface and descends from the central part. Thus, a convection action is generated, and therefore suspended matter and sediment in the wastewater are sucked from the pump suction port 8 while being vigorously stirred. When the water level in both the inner tanks 4a and 4b reaches a predetermined stop water level near the tank bottom, the first pump 7a stops. During this time, not only the waste water in the first inner tank 4 a but also the waste water in the second inner tank 4 b is pumped and discharged through the communication hole 5. This does not simply mean that waste water does not remain in the second inner tank 4b when the pump is stopped. Accordingly, the formation time of the swirl flow is maintained. That is, the stirring time of the suspended matter and the precipitate in the first 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]
Next, when the water level in the outer tub 1 rises to a predetermined starting water level again due to the inflow of the waste water, the second pump 7b is started to discharge and discharge the waste water, and the water level of the inner tanks 4a and 4b is increased. After reaching the upper edge, the waste water in the second inner tank 4b is pumped up and discharged, but the following operation is the same as in the case of the activation of the first pump 7a described above. Omitted.
[0011]
【The invention's effect】
According to the present invention, the waste water discharge device can simultaneously suck up and discharge the waste water in the pump stop side inner tank together with the waste water in the pump drive side inner tank, and precipitates in the pump stop side inner tank. No sediment is accumulated , and a swirl flow is formed and amplified in the inner tank on the pump drive side, and the duration of the swirl is increased. It is effective for. Therefore, there is an advantage that generation of malodor caused by residual scum in the inner 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 feed pipe 4a One inner tank 4b The other inner tank 5 Communication hole 6 Inflow path 7a One pump 7b Other pump 8 Pump suction port 9 Pump discharge port

Claims (1)

Two inner tanks are arranged at the 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. Two pumps are respectively accommodated so that the suction port is opened to the part, the discharge port of each pump is connected to the waste water pumping pipe, and the inflow passage leads from the lower bottom in the outer tank to one or both of the inner tanks Waste water accompanying the drive of the pump in one of the inner tubs is circulated by a communicating hole drilled so as to be led between the bottoms of the two inner tubs in the direction opposite to the rotational direction of the pump. As a result of the suction and discharge action of the other pump, the waste water inflow action from the inside of the other pump stop side into the inside of the pump drive side is produced, and a swirling flow is formed and amplified in the inner tank and the duration of the swirling flow is increased. The water level in the pump stop side inner tank is synchronized with the water level in the pump drive side inner tank. Discharge device for waste water, characterized by being configured to decrease Te.

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