JP3237192B2 - Sewage pumping equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human waste pumping apparatus,
More specifically, the present invention relates to a human waste pumping apparatus that is installed in various buildings such as houses, apartments, and offices and that pumps human waste and miscellaneous wastewater out of the system using a submersible pump.

[0002]

2. Description of the Related Art In recent years, for pumping drainage such as human waste and hot water supply wastewater from houses, apartments, offices and the like installed in places such as basements and the like where piping gradients cannot be installed, or in places away from septic tanks, etc. The mainstream method is to install a submersible pump in the storage tank and drain the water through a pressure pipe.
Hereinafter, a conventional sewage pumping apparatus will be described with reference to the drawings.

FIG. 7 is a cross-sectional view of a conventional human waste pumping apparatus. As shown in the figure, a storage tank 2 having a human waste inflow port 1
Is provided with a lid 3. Inside the storage tank 2, a motor 4, a shaft 5 protruding from the motor 4, an open impeller 6 provided at a tip of the shaft 5 and having no front shroud,
A suction port 7 at the center of the bottom, a discharge port 8 at the side of the cylinder in the tangential direction of rotation of the impeller 6, and a notched return hole 9 at the end face of the cylinder. A submersible pump 12 including a casing 11 shown in FIG. A pressure feed pipe 13 is connected to the discharge port 8, and is connected to a drainage tank (not shown) through the lid 3. Further, the pressure feed pipe 13 is provided with a check valve 14 that can flow out only in the discharge direction. The operation of the human waste pressure feeding device configured as described above will be described below.

The human waste that has been flushed with the flush water from the low tank by the flush toilet flows into the storage tank 2 through the inflow port 1. When the water level of the storage tank 2 rises and the water level becomes equal to or higher than the A water level, the water level sensor 17 installed inside the storage tank 2 detects and the motor 4 starts rotating, and the impeller 6 joined with the shaft 5 also rotates. start. The excrement in the storage tank 2 is sucked into the casing 11 from the suction port 7 by the pump action of the impeller 6 and is discharged from the discharge port 8. The excrement discharged from the discharge port 8 passes through the pressure feeding pipe 13 to the check valve 14 and is fed to the drainage tank (not shown). The check valve 14 prevents the urine in the pumping tube 13 from flowing back into the storage tank 2 when the submersible pump 12 stops operating after the pumping. The operation of the submersible pump 12 causes the water level in the storage tank 2 to decrease, and when the water level sensor detects that the water level has reached the B level, the submersible pump 12 stops operating.

Here, the casing 11 of the submersible pump 12
The water level inside and the movement of air are as follows. That is, when the submersible pump 12 is stopped, the air in the casing 11 is discharged from the return hole 9 so that the water level from the bottom of the storage tank 2 to the A water level is the same as the water level in the storage tank 2. Further, since the air in the casing 11 during the operation of the submersible pump 12 is pushed out of the casing 11 through the return hole 9 by the water / water separation action, even if the water level falls to the B level and some air flows in from the suction port 7 together with human waste. It is pushed out of the casing 11 through the return hole 9, and in this state, the submersible pump 12
Even when the operation is stopped, the water level in the casing 11 is the same as the water level in the storage tank 2 as described above, so that the impeller 6 is always immersed in the waste water when the submersible pump 12 starts operating. In state.

[0006]

However, the conventional human waste pumping apparatus having the above-mentioned structure has the following problems. That is, when foreign substances other than ordinary waste (human waste and toilet paper), such as sanitary products (napkins, etc.) and newspapers, are washed away by the flush toilet together with the washing water of the low tank, and garbage other than hot water supply wastewater When the solids and the like flow into the storage tank 2, clogging of the return hole 9 is likely to occur due to rust caused by corrosion of the casing 11 caused by constantly immersing the submersible pump 12 in sewage. Due to the clogging of the return hole 9, the air in the casing 11 cannot be pushed out of the casing 11 from the return hole 9, and even if the water level in the storage tank 2 reaches the A level, air remains in the casing 11. appear. This allows the impeller 6 to start operating the submersible pump 12.
Could not be sufficiently immersed in human wastewater, and the pump could not be pumped, that is, the airlock phenomenon occurred. Also, if the return hole 9 is clogged after the submersible pump 12 starts up normally, when the water level falls to the B level, air flows into the intake port 7 together with the human waste, and in this state the submersible pump 12 is stopped and restarted. At the time of startup, an air lock phenomenon occurred and pumping was impossible.

Accordingly, an object of the present invention is to provide a human waste pumping apparatus which can prevent the occurrence of an airlock phenomenon of a submersible pump and can always pump water.

[0008]

According to the present invention, a bypass pipe is provided between a discharge port of a submersible pump and a check valve of a pressure feed pipe, and a solenoid valve is provided at a tip of the bypass pipe. It opens and closes when the operation starts and stops.

[0009]

According to the above construction, even if clogging of the return hole occurs due to various causes as described above, the water level in the casing of the submersible pump is the same as the water level in the storage tank, and the water level during operation of the submersible pump is high. Even if the water level drops to the B level and the submersible pump stops operating while air flows in from the suction port together with human waste, the water level in the casing is the same as the storage tank water level. The impeller is in a state of being immersed in human wastewater. Therefore, it is possible to prevent the occurrence of a state where pumping is impossible due to the air lock phenomenon of the submersible pump.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a sectional view of the excrement feeding apparatus. As shown in the figure, a bypass pipe 15 is provided between the discharge port 8 of the submersible pump 12 and the check valve 14 in the pressure feed pipe 13, and an electromagnetic valve 16 is provided at a tip of the bypass pipe 15.

FIG. 2 is an overall system diagram. The low tank 51 is provided with a ball tap 52, and the water supply pipe 5
Water is supplied from 3. The water in the low tank 51 is supplied to the cleaning valve 5
4. Water is supplied to the toilet 56 through the washing pipe 55,
The sewage discharged from the tank is sent to the storage tank 2. The sewage in the storage tank 2 is sucked up by the submersible pump 12 and sent to the purification tank 57 through the pressure pipe 13. Hereinafter, the first operation method of the human waste pressure feeding apparatus configured as described above will be described with reference to the operation time charts of the submersible pump 12 and the solenoid valve 16 shown in FIG.

The solenoid valve 16 installed in the bypass pipe 15 is always open. In this state, the human waste flushed by the flush toilet together with the washing water in the low tank flows into the storage tank 2 from the inflow port 1. Then, the water level of the storage tank 2 rises,
When the water level becomes equal to or higher than the water level A, the water level sensor 17 installed in the storage tank 2 detects this, and the solenoid valve 16 is closed at the same time the motor 4 starts rotating. Further, the impeller 6 joined to the shaft 5 also starts rotating at the same time,
Manure in the storage tank 2 is sucked into the casing 11 from the suction port 7 by the pumping action of the impeller 6, and is discharged from the discharge port 8. The excrement discharged from the discharge port 8 is
3 and is fed to the drainage tank through the check valve 14. Also,
The check valve 14 prevents the urine in the pressure feed pipe 13 from flowing back into the storage tank 2 when the submersible pump 12 stops operating after the pressure feed. Further, the operation of the submersible pump 12 causes the storage tank 2
The water level inside the water decreases, and when the water level reaches the B level, the water level sensor detects this and the submersible pump 12 stops operating, and at the same time, the solenoid valve 16 is closed.

Here, the casing 11 of the submersible pump 12
The water level inside and the movement of air are as follows. That is, when the submersible pump 12 is stopped, the return hole 9 and the solenoid valve 16
From the bottom of the storage tank 2 to the A water level by discharging the air in the casing 11 from the water, the water level in the storage tank 2 is the same as the water level, the water level drops to the B water level, and some air flows into the intake port 7 together with the human waste. Even when the submersible pump 12 stops operating, the water level in the casing 11 remains at the same level as the water level in the storage tank 2 as described above. It is in the state of being immersed.

Further, the foreign matter in the waste water or the casing 11
Even when clogging of the return hole 9 occurs due to internal corrosion or the like, the same phenomenon occurs as in normal operation by discharging air from the solenoid valve 16 into the casing 11. The state of being immersed in human wastewater can be secured. FIG. 6 shows a flowchart of the operation of the overall system. When the cleaning valve 54 opens, the ball tap 52 changes from closed to open. When the water level sensor 17 of the storage tank 2 is turned on, the submersible pump 12 is also turned on, and the solenoid valve 16 is closed.

Next, a second operation method will be described with reference to an operation time chart shown in FIG. In this case, the solenoid valve 16 is always open, the solenoid valve 16 is closed at the same time as the operation of the submersible pump 12, and the solenoid valve is opened after a certain time (several seconds) after the stop of the submersible pump 12. . According to the second operation method, immediately after the operation of the submersible pump 12 is stopped, the residual pressure of the submersible pump 12 is present in the pressure feed pipe 13. To the solenoid valve 16, it is necessary to use a solenoid valve 16 having high resistance to dirty water and foreign matter.
By opening the solenoid valve 16 a few seconds after the stop,
The wastewater can be prevented from flowing into the electromagnetic valve 16 side, and the versatile electromagnetic valve 16 can be used, and the cost can be reduced.

Next, a third operation method will be described with reference to an operation time chart shown in FIG. In this case, the solenoid valve 16 is normally closed, and the solenoid valve 16 is opened only for a certain period (several seconds) before and after the operation of the submersible pump 12. According to the third operation method, it is possible to minimize the energizing time of the solenoid valve 16 and save energy.
Thus, even if the operation method of the present apparatus is changed, the occurrence of the air lock phenomenon can be prevented and the stable operation of the submersible pump 12 can be achieved as in the case of the first operation method.

[0018]

According to the present invention, a bypass pipe is provided between a discharge port of a submersible pump and a check valve, and a solenoid valve is provided at a tip of the bypass pipe. This solenoid valve is used to start and stop the operation of the submersible pump. The solenoid valve opens and closes, so even if clogging of the return hole occurs due to foreign matter in human waste water, corrosion of the casing, etc. Since the impeller is always immersed in the waste water, it is possible to reliably prevent the pump from being unable to pump due to the air lock phenomenon. In addition, since the concern about the air lock phenomenon can be eliminated, the water level in the storage tank can be minimized, the flush water inflow from the flush toilet can be improved, and the flushing power of the flush toilet can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a human waste pumping apparatus according to an embodiment of the present invention.

FIG. 2 is a system diagram of a human waste pumping apparatus according to an embodiment of the present invention.

FIG. 3 is an operation time chart of a submersible pump and a solenoid valve according to one embodiment of the present invention.

FIG. 4 is an operation time chart of a submersible pump and a solenoid valve according to one embodiment of the present invention.

FIG. 5 is an operation time chart of the submersible pump and the solenoid valve according to one embodiment of the present invention.

FIG. 6 is an operation time chart of the entire system according to one embodiment of the present invention;

FIG. 7 is a cross-sectional view of a conventional human waste pumping device.

FIG. 8 is a perspective view of a casing of a conventional human waste pumping device.

[Description of Signs] 1 Inflow port 2 Storage tank 6 Impeller 8 Discharge port 12 Submersible pump 13 Pumping pipe 14 Check valve 15 Bypass pipe 16 Solenoid valve

Claims (4)

(57) [Claims] 1. A submersible pump having an impeller provided in a storage tank for storing human waste, a pressure feed pipe connected to a discharge port of the submersible pump, and an outflow only in a discharge direction provided in the pressure feed pipe. A non-return valve, a bypass pipe provided between the discharge port and the non-return valve, and a solenoid valve provided in the bypass pipe, and the solenoid valve starts and stops the operation of the submersible pump. And a sewage pumping device that opens and closes. 2. The electromagnetic valve is normally open, the electromagnetic valve is closed when the submersible pump is operated, and the electromagnetic valve is opened when the submersible pump is stopped. The excrement feeding apparatus according to claim 1, wherein 3. The solenoid valve is normally open, the solenoid valve is closed at the same time as the operation of the submersible pump, and the solenoid valve is opened after a certain time delay after the stop of the submersible pump. The sewage pumping apparatus according to claim 1, characterized in that: 4. The sewage pumping apparatus according to claim 1, wherein said solenoid valve is normally closed, and said solenoid valve is opened only for a certain period of time before and after operation of said submersible pump.