JP2022175299A - Pump device - Google Patents

Abstract

To provide a pump device capable of replenishing air without restricting operation of a pump.SOLUTION: A pump device of the present invention comprises an air replenishment device. The air replenishment device comprises: an air replenishment valve 25 that opens and closes an air intake port 33a for replenishing air to a suction joint 16; a movable valve 31 that opens and closes the air replenishment valve 25; and a drive unit different from a pump part 9 as a drive unit of the movable valve 31.SELECTED DRAWING: Figure 5B

Description

The present invention relates to pumping devices.

As a document related to this technical field, there is Japanese Patent Application Laid-Open No. 10-82394 (Patent Document 1). The pump main body of the pump device of Patent Document 1 includes an impeller, a casing, a casing cover, a separation chamber, and a check valve. a fixed resistor, a pipe connection that serves as a discharge port, a pressure tank for enabling automatic operation, an automatic air supply device, an electric parts case that houses the pressure switch 12 and electric parts. , (see paragraph 0008). Furthermore, in Patent Document 1, an automatic air replenishing device is provided in the discharge nipple portion, communicates with the suction side through a communication pipe, and is composed of a diaphragm, an air pressure valve, a pressure spring, a nozzle, a ball valve, a case, and a cover. (see paragraph 0009). In this automatic air replenishment device, the diaphragm is suddenly reversed by the negative pressure on the suction side, and the air is sucked from the replenishment valve by the vacuum force generated at this time, including the resistance of the fixed resistor at the suction port ( at startup). This air is pushed into the pressure tank when the pressure on the suction side and the discharge pressure become the same, and a predetermined amount of air is replenished into the pressure tank (see paragraph 0010).

JP-A-10-82394

In the pump device of Patent Document 1, the automatic air replenishment device completes air replenishment when the pump stops. Therefore, if the faucet is used for a long time, the pump does not stop and the air replenishment is not completed. As a means to solve this problem, when the operation is continued for a certain period of time, it is possible to forcibly stop the pump and complete the air supply. It can lead to bad things.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pump device capable of replenishing air without being restricted by the operation of the pump.

In order to achieve the above object, the pump device of the present invention comprises:
A pump section comprising an impeller driven to rotate by an electric motor and a casing having a suction port covering the outer periphery of the impeller, a suction joint communicating with the suction port of the casing, and liquid discharged from the pump section. A pump device comprising a pressure tank capable of accumulating a certain amount of pressure and an air supply device for supplying air to the pressure tank,
The air supply device includes an air supply valve that opens and closes an air intake port that supplies air to the suction joint, a movable valve that opens and closes the air supply valve, and a pump section that serves as a driving section for the movable valve. and a different drive.

ADVANTAGE OF THE INVENTION According to this invention, air supply can be performed without being restricted by operation|movement of a pump.

Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a longitudinal sectional view of a pump device according to an embodiment of the present invention; FIG. 2 is a top view of FIG. 1; FIG. 1 is a longitudinal sectional view of a pump device provided with a conventional air replenishment device; FIG. FIG. 10 is an operation diagram showing a state in which the pump is stopped in the conventional air replenishing device. FIG. 10 is an operation diagram showing a state in which a pump is activated and in operation in a conventional air replenishing device; FIG. 10 is an operation diagram showing a state in which the pump is stopped in the conventional air replenishing device. FIG. 4 is an operation diagram showing a state in which the pump of the suction joint is stopped in one embodiment of the independently driven movable valve of the present invention; FIG. 5B is an operation diagram showing a state in which the pump of the suction joint is started and is operating in the independently driven movable valve of FIG. 5A;

The present invention will be described in detail below with reference to the drawings. First, the outline of the pump device of the present invention will be described with reference to FIGS. 1 and 2. FIG.

The pump device includes a pressure tank 1, a pump section 9, an air-water separation chamber 13, a check valve 15, a suction joint 16, a discharge joint 19, a motor 2 arranged above the pressure tank 1, A control board 3 on which a speed control device for changing the number of rotations of the motor 2 is mounted, an operation board 4 arranged on the motor 2 and capable of switching the display of the discharge pressure value of the pump device and the setting of the operating pressure, etc. a pressure sensor 5; The operation board 4 is connected to the control board 3 (control means) via a communication line. The pump unit 9 , the air-water separation chamber 13 , the suction joint 16 , the discharge joint 19 , the motor 2 , the control board 3 , the operation board 4 , and the pressure sensor 5 are housed inside the pump cover 8 covering the top of the pressure tank 1 . be.

The pump section 9 has an impeller 10 , a casing 11 in which the impeller 10 is placed, and a casing cover 12 that covers the entire surface of the casing 11 . The pump device is called a Wesco pump, and has a casing 11 with a suction port 11(a) and a discharge port 11(b). Although the description of the present invention exemplifies a representative pump, the Wesco pump, the present invention is not limited to the Wesco pump.

A steam-water separation chamber 13 is provided in the upper portion of the pump section 9 . The air-water separation chamber 13 is arranged so as to communicate with the inlet of the pressure tank 1 via a discharge joint 19, and is fixed to the pump portion 9 with screws or the like. The discharge joint 19 is equipped with a pressure sensor 5 .

The suction chamber 14 communicating with the suction passage is provided with a check valve 15. The check valve 15 allows water to flow from the suction port side to the casing 11 side, but prevents the reverse flow. A suction joint 16 having an independently driven movable valve according to the present invention is attached to the pressure tank 1 . The suction joint 16 is connected to a pipe from a pumping water source and communicates with the suction port 11 ( a ) of the casing 11 . On the other hand, a side surface of the pressure tank 1 is connected with a discharge flange 6 for pipe connection, which is provided for feeding pumped and pressurized water to a faucet. The flange 6 and pressure tank 1 are fixed by bolts 18 .

A screw-type priming water supply tap 17 is provided on the upper portion of the air-water separation chamber 13 . The priming water supply plug 17 is removed to supply priming water.

The pressure sensor 5 is means for detecting the water pressure on the discharge side, and the detection result is input to the control board 3 as an electric signal to control the start/stop of the motor 2 .

Next, the operation of the conventional air supply device and the problem to be solved by the present invention will be described with reference to FIGS. 3 and 4A to 4C.

FIG. 3 is a longitudinal sectional view of a pump device provided with a conventional air supply device. The basic component configuration is the same as that of the pump device of the present invention, but the conventional pump device has an air supply device 20 at the discharge joint 19 .

FIG. 4A is a cross-sectional view of a discharge fitting 19 and a conventional air make-up device 20. FIG. The air supply device 20 has a ball valve type nozzle 23 (hereinafter referred to as nozzle) and is attached to the discharge joint 19 . The air supply device 20 and the discharge joint 19 communicate with each other through a hole provided in the nozzle 23 . The cover 20(b) side of the air replenishment device 20 and the suction chamber 14 are connected by a communicating pipe 21, an air replenishment valve 25 is provided in the abdomen of the case 20(a), and a diaphragm is provided in the case 20(a). 22 and a spring 26 are provided.

While the pump is stopped, as shown in FIG. 4A, the diaphragm 22 is pressed against the air-filling valve 25 by the spring 26, and since there is water in the discharge joint 19, the ball 24 built in the nozzle 23 floats. there is When the faucet is used and the pump starts to operate, as shown in FIG. 4B, the space on the side of the cover 20 (b) with respect to the diaphragm 22 is sucked from the suction chamber 14 through the communication pipe 21, whereby the diaphragm 22 is reversed. The spring 26 contracts. At this time, the ball 24 moves together with the water in the discharge joint 19 due to the pressure difference and closes the nozzle 23 , so that the space on the side of the case 20 ( a ) with respect to the diaphragm 22 becomes negative pressure, and the supply valve 25 is supplied with air. Replenish 27.

After that, when the pump stops, the pressure in the suction chamber 14 and the pressure in the discharge joint 19 become the same. Therefore, as shown in FIG. 4C, the diaphragm 22 is pushed by the spring 26 and reversed, and the air 27 accumulated on the side of the case 20(a) is discharged through the nozzle 23 into the air-water separation chamber 13. The air 27 discharged into the separation chamber 13 is carried to the pressure tank 1 together with the water in the air/water separation chamber 13 when the pump is next started, and is replenished.

In this case, the negative pressure generated in the suction chamber 14 is equal to the water head pressure from the pump to the water surface of the well. When the well water level is too shallow to secure 3m, it is common to install a resistor such as a spring corresponding to a water head pressure of 3m on the check valve 15 in the market. There is a possibility that this may lead to poor usability such as poor water flow or the pump not stopping even when the faucet is closed.

Further, since the air supply device 20 completes air supply when the pump stops, if the faucet continues to be used for a long period of time, the pump will not stop and air supply will not be completed. As a means to solve such a problem, when operation is continued for a certain period of time, it is possible to forcibly stop the pump and complete air supply, but stopping the pump causes pressure fluctuations. There is a possibility of causing poor usability.

Next, with reference to FIGS. 5A and 5B, the structure and operation of the suction joint having the independently driven movable valve of the present invention will be described.

Hereinafter, the method of driving the air valve will be described as a solenoid, but the method of driving the independently driven movable valve of the present invention is not limited to the solenoid.

The air replenishing device of this embodiment includes an air replenishing valve 25 for opening and closing an air supply port for replenishing air to the suction joint, a movable valve 31 driven by a drive unit to open and close the air replenishing valve 25, and a movable valve 31. and an urging member (spring 26) for urging the movable valve 31 and the air-filling valve 25 to replenish the pressure tank 1 with air.

The suction joint 16 is provided with a movable valve 31, a spring 26, a movable core 28 for forming a solenoid, a fixed core 29 and a coil 30 (a drive section different from the pump section is provided). ), and the movable valve 31 communicates with the suction joint 16 ( a ) through a communication hole 32 provided in the suction joint 16 . A supplementary air valve 25 is provided on a cover 33 provided so as to cover the drive section. The supplementary air valve 25 is a valve that opens and closes an air intake port 33 a that supplies air to the suction joint 16 . The air intake port 33 a is configured by an opening formed in the cover 33 .

The spring 26 is a biasing member that biases the movable valve 31 and the compensating valve 25 in the direction of pressing the movable valve 31 against the compensating valve 25, that is, the closing direction. In the case of this embodiment, the spring 26 urges the air-filling valve 25 through the movable valve 31 in the valve closing direction.

While the pump is stopped, the movable valve 31 is pressed against the supplementary valve 25 by the spring 26, as shown in FIG. 5A. As a result, the supplementary air valve 25 is in a closed state. When the faucet is used and the pump starts operating, a magnetic field is generated by passing an electric current through the coil 30, and as shown in FIG. is attracted to the fixed core 29 side. As a result, the supplementary air valve 25 loses its urging force for maintaining the valve closed state, and becomes openable. That is, by energizing the driving portion, the air replenishing device opens the movable valve 31 and the supplementary air valve 25 . Air 27 is replenished from replenishment valve 25 through communication hole 32 because suction joint 16 ( a ) has a negative pressure due to being sucked by the pump section.

The air 27 is discharged into the suction joint 16(a) through the communication hole 32 and carried to the pressure tank 1 together with the water to be pumped. When the coil 30 is de-energized, the movable valve 31 is pushed back by the spring 26 and returns to its original state (the state shown in FIG. 5A), completing the supply of air.

If the coil 30 is constantly energized while the pump is in operation, an excessive amount of air will be replenished and the air will be discharged from the faucet, causing a phenomenon called sneezing water and making the pump inconvenient to use. By stopping power supply to the coil 30 after a certain period of time has elapsed even while the pump is in operation, it is possible to maintain an appropriate amount of air replenishment. Further, when the pump continues to operate for a certain period of time, by energizing the coil 30 again, air can be periodically replenished and the amount of air in the pressure tank 1 can be kept constant.

In this embodiment, the suction joint 16 has the movable valve 31 and the driving portion of the movable valve 31 independent of the pump portion 9, so that air can be replenished periodically, and the well water level can be increased. Since a resistor such as a spring that is used when the depth is shallow becomes unnecessary, it is possible to supply air at a low cost while maintaining usability. This eliminates the dependence on the negative pressure generated by the pump and allows it to operate independently of the pump section, maintaining the pumping volume and total shut-off head while maintaining the air It is possible to provide a pump that can be refilled.

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are detailed descriptions for easy understanding of the present invention, and are not necessarily limited to those having all the configurations. Moreover, it is possible to add or replace a part of the configuration of the embodiment with another configuration.

DESCRIPTION OF SYMBOLS 1... Pressure tank 2... Motor 3... Control board 4... Operation board 5... Pressure sensor 6... Discharge flange 7... Suction flange 8... Pump cover 9... Pump section 10... Impeller 11 ... Casing 11a ... Suction port 12 ... Casing cover 13 ... Air-water separation chamber 14 ... Suction chamber 15 ... Check valve 16 ... Suction joint 17 ... Priming water tap 18 ... Bolt 19 ... Discharge Joint 20 Air supply device 21 Communicating pipe 22 Diaphragm 23 Nozzle 24 Ball 25 Air valve 26 Spring 27 Air 28 Movable core 29 Fixed core 30 ... Coil, 31 ... Movable valve, 32 ... Communication hole, 33a ... Air intake.

Claims (5)

A pump section comprising an impeller driven to rotate by an electric motor and a casing having a suction port covering the outer periphery of the impeller, a suction joint communicating with the suction port of the casing, and liquid discharged from the pump section. A pump device comprising a pressure tank capable of accumulating a certain amount of pressure and an air supply device for supplying air to the pressure tank,
The air supply device includes an air supply valve that opens and closes an air intake port that supplies air to the suction joint, a movable valve that opens and closes the air supply valve, and a pump section that serves as a driving section for the movable valve. A pump device comprising: a different drive; The pump device according to claim 1, wherein
A pump device, wherein the drive section includes a movable core, a fixed core, and a coil. The pump device according to claim 2, wherein
The air replenishing device includes a biasing member that biases the air-replenishing valve in a valve-closing direction via the movable valve, and opens the movable valve and the air-replenishing valve by energizing the drive unit. A pump device characterized by: The pump device according to any one of claims 1 to 3,
A pump device, wherein air supplied by said air supply device is conveyed from said suction joint to said pressure tank together with water to be pumped. The pump device according to any one of claims 1 to 4,
The pump device according to claim 1, wherein the driving section periodically drives the movable valve.

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