JPH0941432A - Multiple tank type water feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate switching of a plurality of feed water tanks in a failure or cleaning to save labor and improve safety, and also improve reliability. SOLUTION: In a multiple tank type water feeding device having two or more feed water tanks 1, 2 which are switched in a failure or cleaning to feed water, level sensors 3, 4 are provided in each water feed tank 1, 2, and this device has a sensor switching part 5 for selectively outputting signals from the level sensors 3, 4, and a feed water control part 6 for feeding water into a prescribed feed water tank according to an output signal from the sensor switching part 5. The sensor switching part 5 is controlled by the signal from a control board 7 provided on the same board and having a feed water tank switching mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tank water supply device, and more particularly to a multi-tank water supply device of a type in which water tanks are appropriately switched and used at the time of failure or cleaning.

[0002]

2. Description of the Related Art Conventionally, in water supply facilities for high-rise buildings, a water tank that is dependent on the water pressure causes a pressure shortage, etc., so that a water tank is generally installed at a high place to supply water. .

In the case of such equipment, if only one water tank is installed, water will not be able to be supplied when a failure occurs or when cleaning the water tank, so normally two system water tanks are installed. FIG. 2 shows such a multi-tank type water supply device, which has water supply tanks 1 and 2 which are formed by being partitioned by a partition wall 8. At the time of normal water supply, both tanks 1 and 2 are in communication with each other and used. It was done like this.

Electrodes serving as water level sensors 3 and 4 are provided in the water tanks 1 and 2, respectively.
The signal from is switched by the manual switching device 10 and sent to the water level detection unit. The water level detection unit 11 calculates the actual water level from the signals from the water level sensors 3 and 4, sends the signal to the water supply control unit 6, and operates either the pump 12 or 13 to supply water to a predetermined water tank. To do.

At the time of normal water supply, only the water level sensor 3 or 4 on the side switched by the manual switching device 10 actually operates, and the other water level sensors are disconnected from the system. As is apparent from this configuration, at the time of failure or cleaning of the water supply tank, the function of one water supply tank can be stopped and water can be supplied using the other water supply tank.

[0006]

However, in the above-mentioned conventional apparatus, since the water level sensor is switched by the manual switching machine, a troublesome operation is required, and the cleaning of the water supply tank should be performed by any chance. If an erroneous operation is performed, water may be supplied to the water tank during work.
Further, since wiring from the manual switching device 10 to an external controller such as the water level detection unit 11 is indispensable, the wiring tends to be long,
There was a problem of lack of reliability.

The object of the present invention is to solve the above-mentioned conventional problems, and automatically switches between a plurality of water tanks at the time of breakdown or cleaning to save labor and improve safety. It is intended to provide a multi-tank water supply device which is improved in reliability.

[0008]

The present invention is a multi-tank water supply apparatus, which is configured as follows in order to solve the above-mentioned technical problems. That is, the present invention is a multi-tank type water supply device that has two or more water supply tanks 1 and 2 and switches between these water supply tanks when a failure or cleaning occurs.
2 is provided with water level sensors 3 and 4, and a sensor switching unit 5 that selects and outputs signals from these water level sensors 3 and 4, and a predetermined water supply tank according to the output signal from the sensor switching unit 5 And a water supply control unit 6 for supplying water, and the sensor switching unit 5 is controlled by a signal from a control panel 7 provided on the same base and having a water tank switching mode. Hereinafter, the components of the present invention will be described individually.

(Water Supply Tank) The water supply tanks 1 and 2 can be made of metal such as stainless steel or non-metal such as FRP, and they can be independent of each other or separated by partition walls.

(Water Level Sensor) The water level sensors 3 and 4 are installed on the upper inner surfaces of the water supply tanks 1 and 2, and the electrode system, the float system, the ultrasonic system, and the photoelectric system can be exemplified. The water level sensors 3 and 4 may be those capable of sensing at least the full water level, the normal water level and the drought water level.

(Sensor Switching Unit) The sensor switching unit 5 is a relay or a semiconductor switch, and controls switching by a signal from the control panel 7.

(Water Supply Control Section) The water supply control section 6 is controlled according to the switching state of the sensor switching section 5 and controls the pumps or the like for supplying water to the water supply tanks 1 and 2, respectively.

(Control Panel) The control panel 7 has a logic circuit and has a water tank switching mode. That is, if the water supply tank switching mode is set, the water supply will not be inadvertently started even if an erroneous operation is performed.

The present invention comprises the above essential components, but can also be realized when a pump for supplying water to the water tanks 1 and 2 from the outside, a drain valve, and the like are added. According to such a multi-tank water supply apparatus of the present invention, when switching the water supply tanks, the control panel 7 is operated to set the water supply tank switching mode. Then, a voltage is applied to the relay of the sensor switching unit 5, and the water tank on the side where the water level sensors 3 and 4 are actually used, for example, the water tank 1
When switching to the water supply tank 2 to wash the water, the water level sensor 3 is switched to the water level sensor 4. As a result, the water level of the water tank 2 on the actually used side is measured.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The multi-tank water supply apparatus of the present invention will be described below in more detail with reference to the embodiments shown in the drawings. INDUSTRIAL APPLICABILITY The multi-tank water supply device of the present invention is installed and used in a place requiring an independent pressurized water supply facility such as a high-rise building or a highland.

FIG. 1 shows a multi-tank water supply apparatus according to an embodiment of the present invention. The multi-tank water supply apparatus includes water tanks 1 and 2.
In general, both tanks are connected to each other when water is supplied, and one of the tanks is switched to another when trouble or cleaning is performed.

Each of the water supply tanks 1 and 2 is formed by partitioning one tank with a partition wall 8, and the water level sensor 3 and
4 are provided. As the water level sensors 3 and 4, multi-plate electrode means is adopted. That is, the multi-plate electrode means is composed of a large number of electrode plates (not shown) extending in the water level direction and having different lengths, and the conducting electrodes change depending on the water level. Since such a water level sensor is known, a detailed description thereof will be omitted.

The outputs from these water level sensors 3 and 4 are connected to the sensor switching section 5, respectively. A relay is used as the sensor switching unit 5, and the outputs from the water level sensors 3 and 4 can be switched and output according to an external signal.

The sensor switching section 5 is controlled by a signal from a control panel 7 provided on the same substrate. The control panel 7 is provided with a water tank switching mode that can be set from the outside. The water supply tank switching mode is for switching the water supply tank to be used, and is to perform various operations by emptying the water supply tank at the time of periodic inspection, trouble repair, or cleaning of the water supply tank.

The mode set in the water tank switching mode cannot be switched by a simple switching operation. That is, if switching is performed by a simple switching operation, there is a risk that water will be supplied to the water supply tank during the various operations described above. Therefore, in this embodiment, the water injection mode cannot be entered unless a plurality of preset operations are performed.

The output signal from the sensor switching unit 5 is input to the water supply control unit 6. This water supply control unit 6 is the water injection pump 1
2 and 13 are controlled to control the amount of water supplied to the water tanks 1 and 2.

At the bottom of the water supply tanks 1 and 2, a three-way switching valve 21 leading to a water supply pipe 20 connected to each water supply equipment (not shown) is provided, and at the time of normal water supply, both tanks 1 as shown in FIG. 2 are in communication. Further, drain valves 22 and 23 for discharging dirty water are provided at the bottoms of the water supply tanks 1 and 2, respectively. The sensor switching unit 5 and the water supply control unit 6 are arranged on the same base as the control panel 7.

Next, the operation of the multi-tank water supply apparatus according to the above-described embodiment will be described. When switching the water tank due to a failure or cleaning, the control panel 7 is operated to set the water tank switching mode. Then, a voltage is applied to the relay of the sensor switching unit 5, and when switching to the water tank on the side where the water level sensors 3 and 4 are actually used, for example, the water tank 2 for cleaning the water tank 1, the water level sensor 3 is used. To the water level sensor 4.

As a result, the water level of the water supply tank 2 on the actually used side is measured. At this time, even if carelessly trying to change the water tank switching mode, it is easy to protect the control panel 7 side, so compared with the conventional one that is switched by a simple manual switch, in terms of safety. Are better.

Moreover, since it is not necessary to provide a switch for switching the sensor externally as in the conventional case, the wiring can be simplified.

[0026]

As described above, according to the multi-tank water supply apparatus of the present invention, the sensor switching unit is switched and controlled by the signal from the control panel having the water tank switching mode. It is possible to prevent mistakes in switching and improve safety.

Further, since the sensor switching unit is provided on the same board as the control panel, the conventional wiring is not required and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a multi-tank water supply device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional multi-tank water supply device.

[Explanation of symbols]

 1, 2 water tank, 3, 4 water level sensor, 5 sensor switching section, 6 water supply control section, 7 control panel.

Claims (1)

[Claims] 1. A multi-tank water supply apparatus having two or more water supply tanks, which are used by switching between them in case of failure or cleaning, wherein a water level sensor is provided in each water supply tank, and signals from these water level sensors are provided. A sensor switching unit for selecting and outputting and a water supply control unit for supplying water into a predetermined water tank according to an output signal from the sensor switching unit are provided, and the sensor switching unit is provided on the same base. A multi-tank water supply device, which is controlled by a signal from a control panel having a switching mode.