JPH06101682A - Self-priming type pump device - Google Patents

Abstract

PURPOSE:To detect a condition short of priming in a casing efficiently and prevent the occurrence of unnecessary noises and a bad effect on a pump. CONSTITUTION:A detecting means (upper electrode 15, lower electrode 16) for detecting whether or not priming W in a casing 2 is at a water level to submerge an impeller therein is provided and under the condition short of the priming W a control section 17 controls the impeller not to rotate even if a starting switch 19 is pushed on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a self-priming pump device.

[0002]

2. Description of the Related Art Conventionally, in a self-priming pump, priming water must be present in the casing of the pump in order to perform self-priming at startup. For prevention and to prevent contamination of the priming water when the pump is left for a long time, it may be drained from the casing.If the pump is left for a long time, the priming water inside the casing may evaporate. , There may be a little priming water remaining in the casing.In such a case, the water is not sent normally even if the pump is started, and the rattling noise of the pump occurs forever. He was aware of the lack of priming. Therefore, it takes time until it is determined that the cause of the abnormality is insufficient priming, and noise continues for a long time, which adversely affects pump constituent members.

[0003]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above problems of the prior art. It is possible to detect a lack of priming water in the casing at an early stage and satisfactorily avoid adverse effects on the pump. For the purpose of providing a self-priming pump device,
The first gist of the present invention is, in a self-priming pump having a self-priming ability in which an impeller is rotatably housed in a casing, whether or not priming water is present in the casing to a water level at which the impeller is submerged. That is, the detection means for detecting whether or not is provided.

The second gist is to provide a display unit such as a lamp for displaying a lack of priming water when the lack of priming water is detected in the casing through the detection unit.

Further, the third gist is that when the priming water is detected to be insufficient in the casing through the detection means, the impeller does not start or starts even if the start switch is pressed. That is, the control means for controlling so as to stop the rotating impeller is provided.

[0006]

According to the first aspect, the casing of the pump is provided with the detecting means capable of detecting the water level or the amount of the priming water in the casing. be able to.

In the second aspect, when the priming water is insufficient, the display means displays the lack of priming water. Therefore, by looking at the display means such as a lamp,
The lack of priming water in the casing can be known from the outside.

In the third aspect, when the lack of priming water is detected by the detection means, the control means does not activate the impeller even if the activation switch is pressed, or the impeller is activated. In this case, since it is controlled so as to stop it, the impeller is not rotated unnecessarily for a long time, and the adverse effect on the pump is favorably prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a self-priming pump for a bubble bath. A suction pipe 3 that forms a suction port is provided in the upper left portion of a casing 2 that constitutes the self-priming pump 1. The pipe 3 is connected to the bath so that the hot water in the bath can be sucked in. A discharge pipe 4 that forms a discharge port is provided in the upper right portion of the casing 2.
Is connected to the side wall of the bathroom to circulate hot water in the bathtub. An impeller 5 is provided below the discharge pipe 4 in the casing 2, and the impeller 5 is connected via a bearing 6 to a motor 7 arranged outside the casing 2, and via the motor 7. It is rotated.

Further, a vertical partition plate 8 is arranged in the vertical direction in the center of the casing 2, and the interior of the casing 2 is divided into a left room and a right room by the vertical partition plate 8.
The vertical partition plate 8 has an opening 8 that opens at the impeller 5 portion.
A and a backflow hole 8b that opens below it are formed.

A drain port 9 having a detachable cap is provided at the lower left end of the casing 2, and a guide cylinder 10 is provided on the right side of the drain port 9 on the side of the backflow hole 8b.
Is provided upright, and a valve 11 is provided along the guide cylinder 10 so as to be vertically movable.

A horizontal partition plate 12 is provided above the valve 11 in the horizontal direction, and a nozzle 13 curved toward the impeller 5 is formed on the horizontal partition plate 12. Further, a check valve 14 is provided in a hanging shape at the inlet of the suction pipe 3 into the casing 2.

Further, in this embodiment, an upper electrode rod 15 and a lower electrode rod 16 are provided above the horizontal partition plate 12 on the side wall of the casing 2 with a predetermined interval vertically. The electrode rods 15 and 16 are connected to a control unit 17, and the upper electrode rod 15 and the lower electrode rod 16 can detect the water level of the priming water W stored in the casing 2. The control unit 17 is also connected to the motor 7, and is also connected to an operating panel 18 having a start switch 19 and a display lamp 20.

In such a structure, when the priming water W exists in the casing 2 up to the water level where the entire impeller 5 is submerged, the upper electrode rod 15 and the lower electrode rod 16 are provided.
Is energized via the priming water W, and it is detected that sufficient priming water W is present in the casing 2.
When the switch 7 detects this state, the start switch 19 is turned on, so that the controller 17 starts the motor 7 to rotate the impeller 5. When the impeller 5 starts to rotate, the water level in the room on the right side of the vertical partition plate 8 in the casing 2 rises, and the water level in the room on the left side falls to create a water level difference.
As a result, water flows from the room on the right side through the backflow hole 8b into the room on the left side, and jet water is jetted from the nozzle 13 to the impeller 5
Is ejected to the side.

Then, a mixture of water and air is carried out through the impeller 5, but the air rises toward the discharge pipe 4,
Since the water is jetted from the nozzle 13 as jet water toward the impeller 5 side, the chamber on the left side of the vertical partition plate 8 in the casing 2 approaches a vacuum state, and the check valve 14 is pushed open to open the air from the suction pipe 3. Are drawn, and the air in the suction pipe 3 is gradually drawn out. When the air in the suction pipe 3 is removed, the water flowing into the casing 2 from the suction pipe 3 and the water in the casing 2 are connected, and the water is discharged to the discharge pipe 4 side via the impeller 5 by the normal pump action. Will be discharged.
In this case, the force of the backflow water that flows back to the left chamber through the backflow hole 8b also becomes strong, so that the valve 11 automatically closes the nozzle 13. In the state of FIG. 1, the display lamp 20 is off.

On the other hand, as shown in FIG. 2, when the water level of the priming water W existing in the casing 2 is low, the upper electrode rod 15 and the lower electrode rod 16 are de-energized, and the priming water in the casing 2 is The lack is output to the control unit 17 as a signal. As a result, the control unit 17 turns on the display lamp 20 and displays the lack of priming water. At the same time, when the start switch 19 is pressed in this state, the control unit 17 controls so as not to supply the start power to the motor 7.

Therefore, when the priming water in the casing 2 is insufficient, the indicator lamp 20 is supplied via the control unit 17.
Is turned on and the motor 7 is stopped,
The shortage of priming water can be visually recognized, and the user can perform operations such as replenishing priming water into the casing 2 so that the impeller does not rotate unnecessarily for a long time unlike the conventional case. Therefore, no noise is generated.

In this example, the upper electrode rod 15 and the lower electrode rod 1
Although an example of detecting the water level of the priming water is shown in FIG. 6, it is also possible to detect the water level or the amount of the priming water W in the casing 2 by using other detection means such as a pressure sensor and a lead sensor. .

[0019]

According to the present invention, in a self-priming pump having a self-priming ability in which an impeller is rotatably housed in a casing, priming water is present in the casing to a water level such that the impeller is submerged. By providing the detection means for detecting whether or not it is possible to know the lack of priming water in the casing through the detection means, and it is possible to avoid unnecessary operation of the pump.

Further, by providing a display means such as a lamp for indicating a shortage of priming water when the lack of priming water is detected in the casing through the detection means,
The shortage of priming water in the casing can be satisfactorily known from the outside through the display means, and priming water replenishment measures can be taken well before operation.

Further, when it is detected by the detection means that the priming water is insufficient in the casing, the impeller is not started even if the start switch is pressed, or the impeller is started. By providing the control means to control to stop, the impeller is not operated when there is a shortage of priming water in the casing, so noise generation and adverse effect on the pump can be well prevented. It has the effect that

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a self-priming pump in a state where a priming water level required for self-priming is secured.

FIG. 2 is a schematic configuration diagram of a self-priming pump in a state where a water level necessary for self-priming is not secured.

[Explanation of symbols]

 1 Self-priming pump 2 Casing 3 Suction pipe 4 Discharge pipe 5 Impeller 7 Motor 8 Vertical partition plate 13 Nozzle 14 Check valve 15 Upper electrode rod 16 Lower electrode rod 17 Controller 19 Start switch 20 Indicator lamp

Claims (3)

[Claims] 1. A self-priming pump having a self-priming ability in which an impeller is rotatably mounted in a casing, and whether or not priming water is present in the casing to a water level to the extent that the impeller is submerged. A self-priming pump device comprising a detection means for detecting. 2. The display means, such as a lamp, is provided to display a lack of priming water when the lack of priming water is detected in the casing through the detection means. Self-priming pump device. 3. When the lack of priming water is detected in the casing by the detection means, the impeller is prevented from starting even if a start switch is pressed, or the impeller is activated. The self-priming pump device according to claim 1, further comprising control means for controlling the pump to stop.