JPH0335200B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic air supply device in a water supply system using a pressure tank.

[Prior Art] As is well known, in a water supply system using a pressure tank, water discharged by a pump is stored in the pressure tank, and air in the pressure tank is compressed and pressurized. To replenish air into a pressure tank, a compressor was used to inject air, but when supplying water for drinking purposes, an Orires compressor was used to avoid problems such as mixing lubricating oil into the water. must be used. The use of oil-less compressors requires difficult maintenance, and when pressures are high, oil-less compressors are very expensive. For this purpose, a technique is known that uses the discharge pressure of a pump to replenish air into a pressure tank.

FIG. 1 shows such a known technique, in which a discharge port O of a pump 1 is connected via a valve 2 to a discharge pipe 3, which is connected on one side to an air supply tank 4. At the same time, it is connected to a water pipe 6 via a check valve 5 on the other hand. The air supply tank 4 is provided with an intake valve 7,
The air supply tank 4 is also connected to a pressure tank 9 via a check valve 8. An exhaust valve 10 is connected to the pressure tank 9, and the water side of the pressure tank 9 is further connected to the water pipe 6 via a check valve 11. In the figure, 12 and 13 are piping used when the pumps are connected in parallel.

[Problems with the prior art] In such a prior art, when the air in the air supply tank 4 is forced into the pressure tank 9, pressure water from the discharge pipe 3 also flows into the pressure tank 9 at the same time. It takes a considerable amount of time for the air to separate from the water in the pressure tank 9, and since pressure water also flows into the pressure tank 9 at the same time as the air, the amount of air dissolved into the pressure water is inevitable due to the stirring action at that time. It becomes more common.

When this high-pressure water containing a large amount of dissolved air is released into the atmosphere from the water tap at the end, the air that had previously been mixed or dissolved in minute particles suddenly becomes bubbles and appears in the water. As a result, the water loses its transparency and appears white. In other words, a phenomenon generally referred to as clouding occurs.

[Problems to be Solved] Accordingly, it is an object of the present invention to provide a steam/water separation automatic air replenishment device that prevents air from dissolving in water in a pressure tank and prevents water from becoming cloudy.

[Means for Solving the Problems] According to the present invention, the air in the air supply member is fed to the pressure tank using pressure water from the pump, and the pressure water from the pump is forced to the water side of the pressure tank. In the automatic air supply device of the water supply device,
It is equipped with a water supply pipe that transports water from a pressure tank, and an air supply member that includes an intake valve that automatically supplies air and is connected to the discharge pipe of the pump, and the air supply member is connected to a water supply pipe through an air-water separator. The pump is connected to the air side of the pressure tank, and the discharge pipe of the pump has a branch pipe branched from the upstream side of the air supply member, and the branch pipe is connected to the water side of the pressure tank. A steam/water separation automatic air replenishment device for a water supply system is provided.

[Description of function and effect] Therefore, after the pump is started, the air in the air supply member flows to the steam/water separator by the discharge pressure of the pump, where the passage of water is blocked and only the air is in the pressure tank. It flows to the side or upper side. Pressure water also flows into the water side, ie, the lower side, of the pressure tank via the branch pipe. Therefore, the air supplied to the pressure tank is separated from the water, and the amount of dissolved air is reduced, so that cloudiness does not occur.

[Preferred Embodiment] When implementing the present invention, the steam/water separation device includes:
The air supply member and the steam/water separation device may be integrated into one structure. Alternatively, any device may be used as long as it has the function of blocking the passage of water and allowing air to pass; for example, a steam/water separation valve may be used. In this case, the air supply member may be one in which an intake valve is provided in an air supply tank or a piping portion of a discharge pipe having a relatively large volume.

Furthermore, although the air supply member is constituted by an intake valve that automatically supplies air, an air supply tank may be combined with the intake valve.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 2 and 3. In these drawings, parts common to those in FIG. 1 are denoted by the same reference numerals, and redundant explanation will be omitted.

FIG. 2 shows a first embodiment of the present invention, in which a branch pipe 20 is provided in the discharge pipe 3 upstream of the intake valve 7 and the air supply tank 4, which are air supply members. This branch pipe 20 is connected to a pipe 22 via a check valve 21, and this pipe 22 is connected to the water side of the pressure tank 9, that is, near the bottom. This pipe 22 is connected via a connecting pipe 23 to a pump (not shown) installed in parallel.

On the other hand, a steam/water separation valve 24 is connected to the air supply tank 4, and the steam/water separation valve 24 is connected to the air side of the pressure tank 9 via a check valve 8 and piping 25.

Therefore, during operation, while the pump 1 is stopped, water in the air supply tank 4 returns to the water receiving tank (not shown) through the discharge pipe 3 and the pump 1. Further, a solenoid valve or the like may be provided branching off from the discharge pipe, and the water in the air tank may be drained through the solenoid valve or the like. In this way, at the same time as the water in the air supply tank 4 is discharged, the intake valve 7
Air is drawn into the air supply tank 4 from the air supply tank 4. When the pump 1 is operated, the intake valve 7 is closed, and water discharged from the pump 1 flows from the branch pipe 20 through the piping 22 into the pressure tank 9 and at the same time flows into the air supply tank 4. Then, the air in the air replenishment tank 4 is pushed by the injected water, passes through the steam/water separation valve 24 and the check valve 8, and is transferred from the piping 25 to the pressure tank 9.
flow inside.

When the pressure water in the air supply tank 4 reaches the steam/water separation valve 24, the steam/water separation valve 24 is closed and the pressure water does not flow into the piping 25. Therefore, from now on, the pressure water from the pump 1 passes through the check valve 21 from the branch pipe 20 and enters the pressure tank 9 from the pipe 22. Water in the pressure tank 9 passes through the check valve 11 from the outlet 26 and is supplied from the water pipe 6, and excess air in the pressure tank 9 is discharged from the exhaust valve 10.

The embodiment shown in FIG. 3 omits the air supply tank 4,
Piping section 4 from pump 1 instead of air supply tank 4
A is configured to be relatively long, and this piping portion 4a has the same function as the air supply tank 4. Therefore, the intake valve 7 is connected to the piping portion 4a at a location relatively downstream and close to the steam/water separation valve 24. In other words, in the embodiment shown in FIG. 3, the intake valve 7, which is an air supply member, is not combined with an air supply tank.

The operation and effect of this embodiment are exactly the same as those of the previous embodiment (the embodiment shown in FIG. 2).

[Effects of the Invention] As described above, according to the present invention, the air in the air supply tank 4 or the piping section 4a is caused to flow into the pressure tank via the steam/water separation valve 24 using the discharge pressure of the pump. On the other hand, the pressure water from the pump is allowed to flow into the water side of the pressure tank 9 from the branch pipe 20 via the check valve 21 and piping 22, so that it can be separated from the water and flow into the air side of the pressure tank. This prevents air from stirring into the pressurized water. Therefore, the amount of air mixed into the pressure water in the pressure tank is reduced, and it is therefore possible to prevent the water supply from becoming cloudy.

[Brief explanation of the drawing]

Fig. 1 is a piping diagram showing a conventional automatic air replenishment device, Fig. 2 is a piping diagram showing an example of a steam/water separation automatic air replenishment device implementing the present invention, and Fig. 3 is a piping diagram showing another embodiment. It is. 1...Pump, 3...Discharge piping, 4...Air supply tank, 4a...Piping part, 7...Intake valve, 9...
Pressure tank, 20... Branch pipe, 22... Piping, 2
4...Steam/water separation valve.

Claims (1)

[Claims] 1. In an automatic air supply device of a water supply system that uses pressure water from a pump to forcefully feed the air in an air supply member to a pressure tank, and pressure water from the pump to the water side of the pressure tank, It is equipped with a water supply pipe that conveys water, and an air supply member that includes an intake valve that automatically supplies air and is connected to the discharge pipe of the pump, and the air supply member is connected to the pressure tank through an air-water separator. connected to the air side,
On the other hand, the discharge piping of the pump has a branch pipe branched from the upstream side of the air supply member, and the branch pipe is connected to the water side of the pressure tank. Device.