JPS6013885Y2 - automatic water supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply device that automatically pumps water primarily stored in a water tank above the water tank.

In general, devices that supply water to designated locations in high-rise structures include:
For example, water is primarily stored in a water tank using a lead-in pipe from the water main, and then a pumping pipe is sent to a water tank high up on the inner shell of the structure or to an elevated tank installed at a height that provides the necessary pressure for appliances. A so-called elevated tank type water supply device pumps up water and supplies water from this elevated tank to a predetermined location within the structure by gravity, and the water in the water receiving tank is sent into a pressure tank by a water supply pump, and the air in the pressure tank is pumped out. There is a so-called pressure tank type water supply system that compresses the water in the tank with a compressor and pumps it to a predetermined location in the structure, and also a so-called tankless booster stop water supply that supplies water in the water receiving tank to a predetermined location in the structure using only a water supply pump. There is a device.

However, all of these devices require a pump or compressor with a required discharge pressure depending on the height of the structure, and especially in the booster type, it is necessary to keep the water supply pump running at all times. The electricity required to operate the compressor was enormous, and it was not economical.

In addition, the capacity of the water supply pump in the pressure tank type is larger than that in the elevated tank type, and the pump has to be operated many times, making the switches easy to damage, which poses problems in terms of durability.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to be able to pump water without the need for a pump, to be particularly suitable when the amount of pumped water is large, and to reduce fluctuations in water pressure. However, the aim is to obtain an automatic water supply device with excellent durability.

The present invention will be explained below based on a first embodiment shown in FIG.

In the figure, reference numeral 1 denotes a water tank, which is provided at the lowest part of a structure (not shown).

Water is supplied into the water tank 1 through a water supply pipe 2 branched from a water main, for example.

A float valve 3 is provided at the tip of this water supply pipe 2.

This float valve 3 detects the water surface position in the water tank 1, and when this water surface position is below the reference water level H1, it automatically flows water into the water tank 1 from the water supply pipe 2 to maintain a constant water surface position. It is to be adjusted to.

On the bottom of such a water tank 1, there are a pair of pressure tanks 4,
5 is fixed, and these pressure tanks 4 and 5 are submerged below the water surface of the water receiving tank 1.

An air tank 6 is provided above each pressure tank 4, 5.
Branch pipes 7a and 7b of the pressure vibrator 7 are connected to the pressure vibrator 7.

A compressor 8 is also connected to the air tank 6, and in this embodiment, the compressor 8 is operated intermittently to constantly fill the air tank 6 with compressed air at a predetermined pressure.

Note that the pressure vibrator 7 is provided with a filter 9 and an air pressure reducing valve 10 between its branch portion and the air tank 6.

On the other hand, the branch pipes 7a and 7b are respectively provided with pneumatic three-way switching valves 11 and 12 which are operated by electromagnetic pilot switching valves to be described later.

These pneumatic three-way switching valves 11 and 12 each have three ports A, B, and C, and the first port of the pneumatic three-way switching valve 11 corresponds to one pressure tank 4 (on the right side in the figure). A to air tank 6, third port C to pressure tank 4
The second port B is open to the atmosphere.

Further, the first port A of the pneumatic three-way switching valve 12 corresponding to the other pressure tank 5 is open to the atmosphere, the second port B is connected to the air tank 6, and the third port C is connected to the pressure tank 5. It is communicated.

When compressed air from the electromagnetic pilot switching valve acts on the operating portion 13 of each of the pneumatic three-way switching valves 11 and 12, the first port A and the third port C are brought into communication with each other.
When the pressurization is released, the switching operation is performed between two modes in which the second port B and the third port C are brought into communication.

A working air pipe 14 is led out from the pressure vibrator 7, and the ends of the working air pipe 14 are branched into two parts, and the above-mentioned pneumatic three-way switching valves 11 and 12 are respectively branched.
It is connected to the operating section 13.13 of.

The working air pipe 14 is provided with an electromagnetic pilot switching valve 15 in the middle thereof.

This magnetic pilot switching valve 15 has three ports D.

E and F, the first port D is the working air pipe 1
4 to the pressure vibrator 7, the second port E to the operating parts 13, 13 of the pneumatic three-way valves 11 and 12, respectively, via actuating air pipes 14, and the third port F to the atmosphere. is open to the public.

Note that a filter 16 and an air pressure reducing valve 17 are provided upstream of the electromagnetic pilot switching valve 15 in the working air pipe 14.

In addition, a strainer 18 is provided at the bottom of each pressure tank 4, 5.
An injection pipe 19.19 arranged on the bottom side of the water tank 4 with
These injection pipes 19 and 19 communicate the inside of the water tank 1 and the inside of the pressure tank 4.5.

In addition, there is a pressure tank 4,
Check valve 2 that prevents the water in 5 from flowing back into the water tank 1
0 and 20 are provided.

At the bottom of these pressure tanks 4.5, there are branch pipes 21a, 21b of a pumping pipe 21 that leads the water in the pressure tanks 4, 5 to, for example, a fixture or faucet at a specific location in the structure above the water receiving tank 1. is connected.

In addition, there is a pumping pipe 2 in the middle of the branch pipes 21a and 21b.
A check valve 22.22 is provided which prevents water in the pressure tank 1 from flowing back into the pressure tank 4,5.

Therefore, in one of the pressure tanks 4, this tank 4
A level switch 23 is provided that detects the water surface position within the tank, that is, the highest water level H and the lowest water level, as electrical signals, and switches the electromagnetic pilot switching valve 15 in response to this signal.

Therefore, the electromagnetic pilot switching valve 15 is connected to the first port D.
The switching operation can be performed in two modes: a state in which the port E and the second port E communicate with each other, and a state in which the second port E and the third port F communicate with each other.

Next, the operation of the above configuration will be explained.

When the water level in each pressure tank 4, 5 is higher than the reference water level, for example reaching the highest water level H, the electromagnetic pilot switch 15 is in a state where the first port D and the second port E are communicated with each other. Each pneumatic 3-way switching valve 1
The pressure of compressed air acts on the operation parts 13 of 1 and 12.

Therefore, the pressure of compressed air acts in one of the pressure tanks 4, and the tank is in a waiting state for water supply.

When the water level in one of the pressure tanks 4 reaches the lowest water level by opening a faucet or a device to consume water from such a standby state, the level switch 23 detects this and outputs an electrical signal. It is sent to the electromagnetic pilot switching valve 15.

Then, the electromagnetic pilot switching valve 15 is switched to a state where the second port E and the third port F are communicated with each other, and the operating portions 13 .
Compressed air no longer acts on 13.

For this reason, each of the pneumatic three-way switching valves 11 and 12 is switched to a state in which the second port (B) and the third port (C) are communicated with each other.

As a result, in one pressure tank 4, the compressed air in the tank 4 is discharged to the atmosphere through the second port B, and the pressure in the tank 4 becomes negative.

Therefore, at the same time as water pumping is stopped, water in the water receiving tank 1 is sucked into the pressure tank 4 via the injection pipe 19.

At the same time, compressed air from the air tank 6 is introduced into the upper part of the pressure tank 5 via the pressure vibrator 7 in the other pressure tank 5 .

The inside of this pressure tank 5 becomes high pressure with the inflow of compressed air, and the water inside this pressure tank 5 flows into the pumping pipe 21.
The water is pumped through the

Eventually, when the water level of one of the pressure tanks 4 returns to the highest water level H, the level switch 23 detects this and sends an electric signal to the electromagnetic pilot switching valve 15.

Then, the pilot switching valve 15 is switched to a state where the first port D and the second port E are communicated with each other, and the operation parts 13, 13 of each pneumatic three-way switching valve 11 and 12 are operated.
The pressure of compressed air acts on the

Therefore, each pneumatic three-way switching valve 11 and 12
The switching operation is performed so that the port A of the third port A and the third port C are communicated with each other.

For this reason, compressed air is again introduced into the upper part of one pressure tank 4 via the pressure vibrator 7, and the water in this pressure tank 4 is pumped up via the pumping pipe 21, and the water in the other pressure tank 5 is pumped up. The compressed air of The water inside 1 is sucked in.

Note that the water in the water tank 1 will be reduced by the amount sucked into each pressure tank 4 and 5, but the water surface position of the water tank 1 is constantly detected by the float valve 3 and automatically replenished. Therefore, the amount of water stored will not change.

As described above, according to the first embodiment of the present invention, the power source for pumping the water in the water tank 1 is simply the compressor 8, and a pump that consumes a large amount of power during operation is not required. It is a distant relative of power saving and can pump water economically.

At the same time, a pair of pressure tanks 4,
Since water is pumped alternately from 5 to 5, it is possible to prevent interruptions in pumping even if water consumption is large, and
It is also possible to prevent the pressure tanks 4 and 5 from increasing in size due to an increase in consumption.

In addition, since water is pumped using the pressure of compressed air,
Water hammer and cavitation are less likely to occur during pumping, resulting in low operating noise and vibration.

Furthermore, since a complicated movable structure such as a pump can be omitted, maintenance inspection and handling become easier.

Furthermore, by providing the air tank 6, the number of times the compressor 8 is operated can be kept to the minimum necessary, and the compressor 8 and switches are less likely to be damaged and their durability is improved. , water can always be pumped at approximately constant water pressure.

Moreover, in this first embodiment, the pressure tanks 4 and 5 are submerged in the water tank 1, so even if the pressure in the pressure tank 4.5 were to rise above the allowable limit, the pressure tanks 4 and 5
It is possible to minimize the dangers such as explosions mentioned in No. 5 and is highly safe.

Furthermore, since the water surface position in the water receiving tank 1 is automatically adjusted to a constant level by the float valve 3, almost complete automation of water supply can be achieved.

Next, a second embodiment of the present invention will be explained based on FIG.

Note that the same constituent parts as in the first embodiment described above are given the same numbers, and their explanations will be omitted.

That is, in this second embodiment, each pressure tank 4.5 is provided with a level switch 31.32 for detecting the respective maximum water level H and minimum water level, and these level switches 31.32 are configured to detect the mutual water level. Set the positions to overlap.

Each of the pneumatic three-way switching valves 11 and 12 communicates its first port A with the air tank 6, its third port C with the pressure tanks 4 and 5, and communicates its second port B with the atmosphere. Let it open.

And, such pneumatic three-way switching valves 11 and 12
Electromagnetic pilot switching valves 33 and 34, which are operated individually, are connected to each other, and the water surface position in each pressure tank 4 and 5 is detected to perform water pumping and injection.

Therefore, when the water level in each pressure tank 4, 5 has reached the highest water level H, the electromagnetic pilot switching valves 33, 3 The pressure of compressed air acts on the inside of each pressure tank 4.5, and the pressure of compressed air acts on the inside of each pressure tank 4.5, so that the tank is in a standby state for water supply.

When water is consumed by opening a faucet or appliance from such a standby state, the water level detection positions of the pressure tanks 4 and 5 overlap, so in this embodiment, the other pressure tank 5 (on the left side in the figure) The water surface position will reach the lowest water level first.

For this reason, first, the electromagnetic pilot switching valve 34 corresponding to the other pressure tank 5 is switched to a state where its second port E and third port F are communicated, and the pneumatic three-way switching valve 12 is operated. Compressed air no longer acts on the section 13.

Therefore, the compressed air in the other pressure tank 5 is discharged into the atmosphere via the three-way switching valve 12, and the pressure inside the tank 5 becomes negative. The water in the water tank 1 is sucked in.

However, even if the pumping of the other pressure tank 5 is stopped as described above, the water surface position of the one pressure tank 4 has not yet reached the lowest water level, so the pumping vibrator 2
1 is supplied with water from one pressure tank 4.

Therefore, according to the second embodiment, not only the same effects as the first embodiment described above can be obtained, but also the pumping pressure is prevented from decreasing when the pressure tanks 4 and 5 are switched during pumping. can be prevented, and water pumping can be performed more smoothly.

Note that the present invention is not limited to the first and second embodiments described above.

For example, groundwater may be used as water to be supplied into the water tank, and in this case, the water tank may be connected to piping from a well.

As explained above, in this invention, the water in the water tank is alternately pumped up from a pair of pressure tanks using the pressure of compressed air. It is possible to achieve power savings without the need for pumps that consume large amounts of water, and it is also possible to prevent interruptions in water pumping even when water consumption is large, and the pressure tank becomes larger as consumption increases. can also be prevented.

In addition, water hammer and cavitation are less likely to occur during pumping, and water can always be supplied at a substantially constant water pressure, providing excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing a first embodiment of the present invention, and FIG. 2 is a schematic block diagram showing a second embodiment of the present invention. 1... Water tank, 4, 5... Pressure tank, 7... Pressure vibrator, 8... Pressure supply source (compressor), 11, 12... ... Pressure switching valve (pneumatic 3-way switching valve), 15 ... Solenoid pilot switching valve, 21 ... Lifting pipe, 23 ...
...Control mechanism (level switch).

Claims (3)

[Scope of utility model registration request] (1) In a device that pumps water supplied into a water tank above the water tank, a pair of pressure tanks are provided in the water tank and are located below the water surface of the water tank and communicated with the water tank. A pumping pipe for pumping the water in the tank upwards is connected to the bottom of each pressure tank, and
The upper part of each pressure tank is connected to a pressure supply source via a pressure vibrator, and a pressure switching valve operated by a pilot switching valve is provided in the middle of these pressure vibrators, and at least one of the pressure tanks is connected to the pressure tank. A control mechanism is provided that detects the water surface position of one pressure tank and operates the pilot switching valve according to the water surface position to switch the pressure switching valves respectively. When the lowest water level is reached, the air in one pressure tank is discharged to the outside via the pressure switching valve, the water in the water tank is introduced into one pressure tank, and pressure is supplied to the other pressure tank. Air from the source is introduced through the pressure switching valve, and the water in the other pressure tank is pumped up through the pumping pipe, and when the water level in one of the pressure tanks reaches its maximum water level, this one Air from a pressure supply source is introduced into the pressure tank of the pressure tank through the pressure switching valve, and the water in one pressure tank is pumped up through the pumping pipe, and the air in the tank is pumped up in the other pressure tank. An automatic water supply device characterized in that water in a water receiving tank is introduced into the other pressure tank by discharging water to the outside via a pressure switching valve. (2) Utility model registration claim No. (1) characterized in that the pair of pressure tanks are submerged in a water receiving tank.
Automatic water supply device as described in section. (3) The automatic water supply device according to claim (1) of the utility model registration claim, wherein the water level in the water tank is automatically adjusted to a reference water level by a water level adjustment valve. .