JP3416271B2 - Water supply device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device for pumping water to a plurality of reservoirs, distribution reservoirs or water tanks arranged at different heights through a water supply conduit.

[0002]

2. Description of the Related Art FIG.
In the case of sending water to a plurality of reservoirs or distribution reservoirs 11 and 12 arranged at different heights, the intake river 15
The water from the above is pumped up by the pump facility 13 and is sent to the respective reservoirs or distribution reservoirs 11 and 12 through the water supply pipe line 14.

In the water supply device having the above structure, control valves 16 and 17 are provided at the inflow ports of the respective reservoirs or distribution reservoirs 11 and 12 in order to maintain the water level of the respective reservoirs or distribution reservoirs 11 and 12 at the regulated water level. , Water level sensors 18 and 19 are provided, the outputs of the water level sensors 18 and 19 are input to the control device 20, and the pump equipment 13 is operated and controlled by the output of the control device 20 to control the water levels of the respective reservoirs or distribution reservoirs 11 and 12. Is maintained at the prescribed water level.

[0004]

In the above conventional water supply device, the pump equipment 13 normally generates a water pressure capable of sending water to the reservoir or distribution reservoir 11 at the highest position. That is, in the above water supply pipeline configuration, for example, even when water is supplied to the reservoir or distribution reservoir 12 at the lower position, the pump facility is operated at the water pressure of the actual head H ₁₁ to the reservoir or distribution reservoir 11 at the highest position. 13 had to be driven, which wasted energy and was uneconomical.

The present invention has been made in view of the above points, and eliminates the above problems, and supplies water to a plurality of reservoirs or distribution reservoirs arranged at different heights so that energy-saving and economical operation can be achieved. It is to provide a water supply device.

[0006]

In order to solve the above problems, the present invention provides a pump facility 13 through a water supply conduit to a plurality of reservoirs or distribution reservoirs or tanks arranged at different heights.
In the water supply device for supplying water from the reservoir or distribution reservoir or the water tank 11 at a high position in the middle of the water supply pipeline near the branch pipe 14a to the reservoir or distribution reservoir or the water tank 12, as shown in FIG. It is characterized in that a check valve 21 for preventing back flow of the air and an air pipe 22 for allowing atmospheric air to flow into the water supply pipe line 14 are provided. The check valve 21 is installed at a position higher than the water level in the reservoir or distribution reservoir or the water tank 12.

Further, the auxiliary check valve 2 is closed in the air pipe 22 when the pressure in the water supply line is higher than the atmospheric pressure and is opened when the pressure is lower than the atmospheric pressure.
3 is provided.

[0008]

According to the present invention, by adopting the above-mentioned structure, by closing the check valve 21 of the water supply pipe 14 when the water level in the reservoir or distribution reservoir or the water tank 12 below is increased and the water level is lowered. The pressure (water level) from the check valve 21 to the pump facility 13 side drops to the same water level as that of the reservoir or distribution reservoir or the water tank 12. That is, at this time, the actual pumping head of the pump that supplies water to the reservoir or distribution reservoir or water tank 12 is the water level H ₁₂ of the reservoir or distribution reservoir or water tank 12, and the pump facility 13 can be operated at a low actual pumping head.

An auxiliary check valve 23 provided on the air pipe 22
Is normally closed when the pressure in the water supply conduit 14 is high, and is opened to allow air to flow into the water supply conduit 14 only when the pressure in the water supply conduit 14 drops below atmospheric pressure.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of the water supply device of the present invention.
As shown in the figure, the water supply device includes a plurality of (two in the figure) reservoirs or distribution reservoirs or tanks 11 and 12 at different heights.
Are installed, and each reservoir or distribution reservoir or tank 11,
The control valves 16 and 17 are provided at the inflow ports of 12, the water level sensors 18 and 19 are provided, and the control valves 16 and 17 are controlled by the output signals of the water level sensors 18 and 19, which is the same as the above-mentioned conventional example.

The present embodiment is different from the above-mentioned conventional example in that a check valve 21 is provided in the water supply pipe line 14 at a position slightly higher than the water level of the reservoir or distribution reservoir or the water tank 12 at the lower position,
When the water level of the reservoir or distribution reservoir or tank 12 in the lower position is lowered, the water in the reservoir or distribution reservoir or tank 11 in the higher position (this water is the water sent with high energy cost) does not flow backward In addition, the thin air pipe 2 is provided in front of the check valve 21 (on the pump equipment 13 side).
2 is provided so that air can flow in when the pressure of the water supply pipe line 14 decreases.

An auxiliary check valve 23 is provided in the air pipe 22, and the auxiliary check valve 23 is normally closed when the pressure in the water supply pipe 14 is high, and the pressure in the water supply pipe 14 becomes lower than atmospheric pressure. It is designed to be opened only when the air flows into the water supply pipe line 14.

In the water supply device having the above structure, the pump facility 13 is stopped after the water has been sufficiently supplied to each of the reservoirs or distribution reservoirs or the water tanks 11 and 12. When the water demand in the pond or tank 12 increases and the water level decreases, the controller 20 causes the water level sensor 1
9, the pump equipment 13 is operated, and the control valve 17 is opened by the output signal of the water level sensor 19 to send water to the reservoir or distribution reservoir or the water tank 12.

At this time, the check valve 21 of the water supply line 14 is closed and the water supply line 1 on the pump equipment side at the point where the check valve 21 is present.
The pressure (water level) of 4 drops to the same water level as that of the reservoir or distribution reservoir or the water tank 12. That is, at this time, the actual operating head of the pump facility 13 that supplies water to the reservoir or distribution reservoir or tank 12 is the water level H ₁₂ of the reservoir or distribution reservoir or tank 12,
The pump equipment 13 can be operated at a low actual head.
The check valve 21 and the auxiliary check valve 23 are not limited to the check valves as long as they have a function of preventing the reverse flow of water and air.

As described above, by operating the pump equipment 13 in accordance with the water level of the reservoir or distribution reservoir or the water tank in which the water level is required to be supplied, the water supply device can be operated economically with energy saving.

In the above embodiment, two reservoirs or distribution reservoirs or tanks 11, which are arranged at different heights,
Although the number of reservoirs, distribution reservoirs, or tanks is not limited to this, the case where two or more reservoirs, distribution reservoirs, or tanks are arranged at different heights is described as an example. The present invention exerts its effect more. The water tank shall also include an elevated tank.

From the actual arrangement of reservoirs or distribution reservoirs or water tanks and the amount of each water supply, the economical efficiency of this water supply device is compared and examined. You can expect good driving. The pump control at this time is performed by receiving information (such as the output of the water level sensor 19) from the reservoir, the distribution reservoir, or the water tank (in the above-described embodiment, the reservoir, the distribution reservoir, or the water tank 12) for sending water.

[0018]

As described above, according to the present invention, when the water level in the lower reservoir, distribution reservoir or tank increases and the water level decreases, the check valve of the water supply line is closed, The pressure (water level) from the check valve to the pump side decreases to the same water level as the water level in the lower reservoir, distribution reservoir, or tank, so that the pump can be operated at a low actual head and the water supply device can save energy. The excellent effect of being able to drive economically is obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a water supply device of the present invention.

FIG. 2 is a diagram showing a configuration example of a conventional water supply device.

[Explanation of symbols] 11 Reservoir or distribution reservoir or tank 12 Reservoir or distribution reservoir or tank 13 Pump equipment 14 water pipeline 14a Branch pipe 15 intake river 16 control valve 17 Control valve 18 Water level sensor 19 Water level sensor 20 Control device 21 Check valve 22 air tube 23 Auxiliary check valve 24 Demand side pipeline

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Claims (2)

(57) [Claims] 1. A water supply device for pumping water to a plurality of reservoirs or distribution reservoirs or water tanks arranged at different heights through a water supply conduit, wherein the water pipes near the branch pipes to the reservoir or distribution reservoir or tank. A water supply device comprising a check valve for preventing backflow of water from a reservoir, a distribution reservoir, or a water tank located at a high position and an air pipe for allowing atmospheric air to flow into the water supply pipe line in the middle of the passage. 2. A water supply apparatus, wherein the air pipe is provided with an auxiliary check valve which is closed when the pressure of the water supply pipe line is higher than atmospheric pressure and which is opened when the pressure is low.