JP4418049B2 - Self-priming pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-priming pump in which circulating water is circulated in the pump in order to perform a self-priming action.
[0002]
[Prior art]
A self-priming pump and a non-self-priming pump will be described with reference to FIGS. FIG. 4 is a schematic view of the pump illustrating the flow of water during the self-priming operation. FIG. 5 is a schematic view of the pump illustrating the flow of water during non-self-priming operation. FIG. 6 is a graph illustrating pumping characteristics of the pump during self-priming and non-self-priming.
[0003]
In FIG. 4, when the amount of water stored in the pump 11 decreases below a certain level, the self-priming pump 11 cannot supply or distribute water. By circulating in the pump 11, the air in the pipe is vented.
[0004]
If the pump is configured so that the amount of water stored in the pump 12 exceeds a certain level (no need for self-priming motion), the water is circulated as shown in FIG. Can be omitted.
[0005]
[Problems to be solved by the invention]
In the self-priming pump of FIG. 4, the water to be discharged outside the pump is recirculated into the pump by the impeller, so that the pumping characteristics are the non-self-priming type of FIG. The characteristics were worse than the pump.
[0006]
[Means for Solving the Problems]
Therefore, according to the present invention, a casing having a water passage formed therein, a circulation water passage serving as a path for circulating water in the casing, and a swing passage provided in the water passage of the casing. And a flow rate switch combined valve formed of a magnetic material, and a sensor that turns on / off when the flow rate switch combined valve approaches or moves away,
When the casing is not filled with water, the ring circulation channel is opened, the sensor is turned off to perform a self-priming operation, and when the casing is filled with water, the flow switch combined valve is turned on. Provided is a self-priming pump characterized in that it swings to close the ring circulation channel, and a sensor is turned on to perform a non-self-priming operation.
[0007]
[Action]
During the self-priming operation, the circulation channel is opened, the water pushed out by the impeller is circulated through the circulation channel, and only the air remaining in the pipe and the channel is discharged out of the pump.
[0008]
When air is released from the inside of the pipe and the pump and filled with water, the flow switch combined valve swings due to the water pressure, finally closes the circulation channel and turns on the sensor. That is, by closing the circulation channel, non-self-priming operation is performed, and the operation efficiency is improved. Further, by turning on the sensor, it is transmitted to other devices, a control unit, and the like that the pump is flowing in a normal amount of water and is in a normal operation.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a self-priming pump according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic view of a self-priming pump during self-priming operation according to the present invention. FIG. 2 is a schematic view of the self-priming pump during non-self-priming operation according to the present invention. FIG. 3 is a schematic view of the vicinity of the flow switch combined valve portion of FIG.
[0010]
1 and 2, a self-priming pump 1 includes a motor 2, a casing 4 in which a water passage 3 for passing water is formed, and a shaft 2 a of the motor 2. The impeller 5 housed in the water passage 3, the flow switch combined valve 6 made of a magnetic material and disposed in the water passage 3, and the flow switch combined valve 6 attached to the surface of the casing 4 approach, or The sensor 7 is composed of a hall sensor or the like that is turned on / off by moving away.
[0011]
The circulation channel 3 is provided with a ring circulation channel 3 a so that the water sent in the direction of the discharge port 8 by the rotation of the impeller 5 returns to the impeller 5 again through the ring circulation channel 3 a. It is configured. A discharge port 8 and a suction port 9 are respectively formed at the outlet and the inlet of the water passage 3. A pipe (not shown) is attached to each, through which the discharge port 8 is connected to a faucet or a water heater, and the suction port 9 is connected to a bathtub, a water tank, or the like. Yes.
[0012]
The flow rate switch combined valve 6 is formed in a plate shape, is disposed in the water passage 3 between the impeller 5 and the discharge port 8, and is attached so as to swing around an arbitrary point. . When the water pressure is applied by the rotation of the impeller, the flow switch combined valve 6 swings, and the circulation channel 3a is blocked by the absence of air in the channel 3.
[0013]
The sensor 7 is a device that detects whether or not sufficient water is discharged from the discharge port 8, and when the impeller 5 rotates in a state where the water passage 3 is filled with sufficient water as will be described later. Sufficient water pressure is generated to swing the flow switch combined valve 6. That is, the flow switch combined valve 6 is swung by water pressure, approaches the sensor 7 and turns on the sensor 7. By turning on the sensor 7, it is possible to transmit to the other devices, the control unit, and the like that the pump 1 is in a normal operation in which a normal amount of water is flowing.
[0014]
In FIG. 1, the water passage 3 in the casing 4 is not filled with sufficient water, and air remains in the pipe connected to the water storage tank. When the motor 2 is driven to rotate the impeller 5, the water in the casing 4 returns to the impeller 5 again through the circulation channel 3 a without being discharged from the discharge port 8 to the outside of the pump 1. It becomes the circulating water that comes. Further, air remaining in the pipe and water stored in a water storage tank or the like flow from the suction port 9, and the air passes through the water passage 3, the impeller 5, and the discharge port 8 to the pipe. Discharged. The water circulates in the casing 4. At this time, the flow switch combined valve 6 only swings up and down and with a small width, and is far from the sensor 7. Therefore, this sensor 7 is in an off state.
[0015]
In FIG. 2, the water passage 3 in the casing 4 is filled with water, and no air remains in the pipe connected to the water storage tank, and the motor 2 is driven in this state. Then, when the impeller 5 is rotated, water is pushed out in the direction of the discharge port and flows from the water storage tank to the faucet and the like through the pipe and the pump. The flow switch combined valve 6 is swung by the water pressure at this time to close the ring circulation water channel 3a. That is, water does not circulate and non-self-priming operation is performed.
[0016]
As described above, when the flow switch combined valve 6 closes the circulation channel 3a, the flow switch combined valve 6 approaches the sensor 7 and the sensor 7 is turned on.
[0017]
In FIG. 3, when the circulation flow channel 3 a is completely closed by the flow switch combined valve 6, an O-ring 10 is provided over the entire circumference of the edge of the circulation flow channel 3 a, and the flow switch combined valve 6 is set to O By pressing against the ring 10, it is possible to prevent water leakage into the ring circulation water channel 3a.
[0018]
For example, when the self-priming pump configured as described above is used connected to a water heater, the sensor is turned off when the self-priming motion is performed with air remaining in the pipe as shown in FIG. It has become. This off signal is transmitted to the water heater so that the burner of the water heater does not ignite while the off signal is output. In other words, avoid running idling. When the air venting in the pipe is completed and the switch combined valve closes the circulating water channel and the sensor is turned on, this ON signal is transmitted to the water heater so that the burner of the water heater can be ignited.
[0019]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the efficiency at the time of pump normal operation can be improved, preventing the idling operation of a self-priming pump.
[0020]
[Brief description of the drawings]
FIG. 1 is a schematic view of a self-priming pump during self-priming operation in the present invention.
FIG. 2 is a schematic view of a self-priming pump during non-self-priming operation according to the present invention.
FIG. 3 is a schematic view of the vicinity of the flow switch combined valve portion of FIG. 2;
FIG. 4 is a schematic view of a pump illustrating the flow of water during self-priming operation.
FIG. 5 is a schematic view of a pump illustrating the flow of water during non-self-priming operation.
FIG. 6 is a graph illustrating pumping characteristics of a pump during self-priming and non-self-priming.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Self-priming pump 2 ... Motor 3 ... Water passage 4 ... Casing 5 ... Impeller 6 ... Flow rate switch combined valve 7 ... Sensor 8 ... Discharge port 9 ... Suction port 10 ... O-rings 11, 12 ... Pump

Claims (1)

In the self-priming pump that circulates circulating water in the pump to perform self-priming action,
A casing with a water passage formed inside;
A circulating water channel serving as a path for circulating water in the casing;
A flow rate switch combined valve which is disposed in the water passage of the casing and is swingably attached and formed of a magnetic material;
This flow switch combined valve is equipped with a sensor that turns on / off by approaching or moving away,
When the casing is not filled with water, the ring circulation water channel is opened, the sensor is turned off, and the self-priming operation is performed.
A self-priming pump characterized in that when the casing is filled with water, the flow switch combined valve is swung to close the ring circulation water channel and the sensor is turned on to perform a non-self-priming operation. .

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