JPS6022200B2 - automatic water supply device - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an automatic water supply device.

[Prior Art] Some conventional automatic water supply devices include a pressure tank on the discharge side of a pump and an air replenishment device for replenishing the pressure tank with air.

[Problem that the invention seeks to solve]

In the conventional automatic water supply device, when the suction side of the pump is at the upper level and reaches the push-in water level, the suction side does not become negative pressure when the pump is started.

For this reason, it has been impossible to use an air replenishment device of a type in which one end of the air replenishment device is connected to the suction side of the pump and the suction side member pressure is used when the pump is started. Various improvements have been made to solve this problem, but none have been able to provide sufficiently reliable operation.

[Means for solving problems]

The present invention has been made to solve this problem, and includes a pressure tank 7 on the discharge side of the pump 5, and connects one end 9a of the air supply device 9 to the pressure tank 7. In an automatic water supply device having an end 9b connected to the suction side of the pump 5, a constant resistor 1 is provided upstream from the connection point of the other end 9b of the replenishing device 9 on the suction side of the pump 5.
1, and this constant resistor 11 is connected to a valve seat 29 having a water passage hole 29a, a resistor 31 that adjusts the flow path area from this water passage hole 29a to the downstream side, and a resistor 31 connected to the valve seat 29 having a water passage hole 29a, The side facing diaphragm 39 and this diaphragm 39
a cover 45 that covers the outside of the diaphragm 39 and has an atmosphere communication hole 47 that is opened and closed by a part 43 of the diaphragm 39;
This automatic water supply device is characterized in that the pressure receiving area of the diaphragm 39 and the pressure receiving area of the resistor 31 are made the same.

[Effect]

In this configuration, when the suction side of the pump 5 is at the pumping water level, positive pressure is sensed by the diaphragm 39 of the constant resistor 11.

This causes the diaphragm 39 to move upward and pull up the resistor 31, thereby reducing the area of the flow path from the water passage hole 29a of the valve seat 29 to the pump 5 side. At this time, the diaphragm 39 comes into contact with the inner surface of the cover 45 and blocks the air vent hole 47. When the pump 5 is started in this state, the resistor 31
Water closer to the pump 5 is sucked into the pump 5.

Furthermore, water on the upstream side of the resistor 31 is also attempted to be sucked, but
Since the diaphragm 39 receives positive pressure upstream of the resistor 31 and pulls the resistor 31 upward, the resistor 31 becomes a large water flow resistance. In addition, the movement of water tries to move the resistor 31, but since the diaphragm 39 that moves in conjunction with the resistor 31 blocks the atmosphere communication hole 47, the internal pressure in the space between the diaphragm 39 and the cover 45 decreases. However, the pressure difference generated before and after the resistor 31 increases.
Therefore, negative pressure necessary to operate the automatic air supply device 9 is generated downstream of the resistor 31, that is, between the resistor 31 and the pump 5, and the automatic air supply device 9 performs sufficient air supplementary operation. . After that, the operation of the pump 5 progresses and the constant resistance element 1
Once the first resistor 31 is wide open, the water flow resistance in this part is reduced, so the pump 5 performs a normal water pumping action. Since the pressure-receiving area of the diaphragm 39 and the pressure-receiving area of the resistor 31 are set to be the same, a water flow resistance proportional to the pumping water level is generated, and the automatic air supply device 9 is activated when the pump 5 is started, regardless of the size of the pumping water level. It is possible to generate sufficient negative pressure necessary for operation. [Examples] Examples of the present invention will be described below with reference to FIGS. 1 to 4.

As shown in FIG. 1, the automatic pump is composed of a pump 5, a pressure tank 7, a pressure switch 13, and the like. A check valve 3 is connected to the suction side of the pump 5 via an inner suction pipe 17. In addition, a suction pipe 15 is provided on the upstream side of the check valve 3.
A constant resistance body 11 is provided through the constant resistance body 11, and a water pumping pipe 23 is connected to the upstream side of the constant resistance body 11.

The water pump 23 is a water storage tank 60 located above the pump.
'This is connected. The pump 5 is connected to the pressure tank 7 through an inner discharge pipe 19, and pressure water is supplied from a discharge pipe 21 provided on the discharge side of the pressure tank 7.

9 is an automatic air supply device, one end 9a is connected to the pressure tank 7,
The other end 9b is connected to the suction inner pipe 17 via the lotus pipe 25.

The internal space 9c is divided into two by an elastic member 9d, and one end 9
The space on the a side is communicated to the outside via a valve 9e. The elastic member gd is pressed against one end 9a side by a tongue 9f. The constant resistor 11 is as shown in FIGS. 3 and 4, and the body 27 has two connection ports. The pumping pipe 23 is connected to one end of the body 27, and the suction pipe 15 is connected to the other end. A valve seat 29 is provided in the middle of the connection port of the body 27, and a resistor 31 is provided to reduce the flow path area from the water passage hole 29a of the valve seat 24 to the suction pipe 15.

A plurality of legs 33 are provided around the resistor 31 for guiding purposes, and a stem 35 is provided in the center. The upper end of the stem 35 is connected to the diaphragm 3 via the mounting plate 37.
It is connected to the center of 9. The diaphragm 39 is provided with mounting plates 37 on the top and bottom, and is sealed with a nut 41, and a packing 43 made of rubber or the like is provided on the upper end of the nut 41.

Further, the outer periphery of the diaphragm 39 is attached to the Sekiguchi Bridge Green on the upper end surface of the body 27 with a top cover 45. An atmospheric air passage hole 47 is provided at a position corresponding to the packing 43 of the top cover 45 and is opened and closed by the packing 43. When this diaphragm 39 receives positive pressure on its lower surface, its central portion moves upward and pulls up the resistor 31, and when it receives negative pressure on its lower surface, it pulls down the resistor 31. With the above configuration, the operation will be explained next.

As shown in FIG. 1, when the suction side of the pump 5 is at the push-in water level, positive pressure is applied to the lift pipe 23. This positive force is sensed by the diaphragm 39 of the constant resistor 11. As a result, the center of the diaphragm 39 moves upward, pulling up the resistor 31 via the stem 35 and reducing the area of the flow path from the water passage hole 29a of the valve seat 29 to the suction pipe 15. At this time, the gasket 43 of the diaphragm 39 comes into contact with the inner surface of the top cover 45 and closes the air passage hole 47, and the constant resistor 11 is in the state shown in FIG. 3. When the pump 5 is started in this state, water in the suction pipe 15 is sucked into the pump 5.

Furthermore, the water in the lift pipe 23 is also attempted to be sucked, but the diaphragm 39 receives positive pressure inside the lift pipe 23 and pulls the resistor 31 upward, so this resistor 31 becomes a large water flow resistance. In addition, although the movement of water attempts to move the resistor 31, the diaphragm 39 moves together with the resistor 31.
Since the packing 43 closes the air passage hole 47,
The internal pressure in the space between the diaphragm 39 and the top cover 45 decreases, and the pressure difference generated across the resistor 31 increases. Therefore, on the downstream side of the resistor 31, that is, between the resistor 31 and the pump 5, negative pressure necessary to overcome the spring 9f of the automatic air supply device 9 and operate the elastic member 9d is generated, and the automatic air supply The device 9 provides sufficient air compensation. After that,
When the operation of the pump 5 progresses and the resistor 31 of the constant resistor 11 opens wide, the water flow resistance in this part decreases, and the pump 5 performs the normal pumping action, as shown in Fig. 4. become. By setting the effective pressure-receiving area of the diaphragm 39 and the pressure-receiving area of the resistor 31 to be the same, a water flow resistance proportional to the pumping water level is generated, so that regardless of the size of the pumping water level, when the pump 5 is started, it is automatically activated. Sufficient negative pressure necessary for the operation of the air supply device 9 can be generated. In this way, the constant resistance element 11 is very simple in structure, reliable in operation as mentioned above, and automatic air supply that replenishes the air necessary to maintain the function of the pressure tank 7 of the automatic pump. Since the device 9 can be operated, the present invention can provide an automatic water supply device that is highly effective in practice.

〔Effect of the invention〕

According to the present invention, even if the water flow side of the pump 5 is at the pushing water level, when the pump 5 is started, a large negative pressure can be generated on the suction side to reliably operate the air supply device 9, and the pushing water level can be lowered. Regardless of the size, it is possible to sufficiently generate the negative pressure necessary for the operation of the air supply device 9.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of an automatic pump embodying the present invention;
The figure is a cross-sectional structural diagram of an automatic air supply device, and FIGS. 3 and 4 are cross-sectional structural diagrams showing the main structure of an embodiment of the present invention. 1. Automatic pump, 3. Check valve, 5.
...Pump, 7...Pressure tank, 9...
... Automatic air supply device, 11 ... Constant resistance element, 13 ... Pressure switch. Figure 1 Figure 2 Figure 3 Bacterial abundance map

Claims (1)

[Claims] 1. A pressure tank 7 is provided on the discharge side of the pump 5, one end 9a of the air supply device 9 is connected to the pressure tank 7, and the other end 9b of the air supply device 9 is connected to the suction side of the pump 5. In the water supply device, a constant resistance body 11 is connected upstream from the connection point of the other end 9b of the replenishment device 9 on the suction side of the pump 5, and this constant resistance body 11 is connected to a valve seat 29 having a water passage hole 29a. A resistor 31 that adjusts the flow path area from the water hole 29a to the downstream side, a diaphragm 39 connected to the resistor 31 and facing the upstream side, and the diaphragm 3
9 and a cover 45 having an atmosphere communication hole 47 which is opened and closed by a part 43 of the diaphragm 39, and the pressure receiving area of the diaphragm 39 and the pressure receiving area of the resistor 31 are made the same. Features an automatic water supply device.