JPS6144748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water storage tank used as an emergency water source during an earthquake.

In cities, it is becoming increasingly important to secure emergency water sources necessary for drinking, etc., in case water supply facilities are damaged in the event of a major earthquake. However, there is a problem that if water is stored in a static state for a long period of time, it becomes contaminated and becomes unsuitable for use as drinking water. Therefore, in addition to installing the water tank main body in the water pipe, we also installed a bypass pipe in parallel with the water pipe, and by constantly sending water through the water tank main body, new water is always stored in the water tank main body, and earthquakes can occur. At times, we attempted to secure water in the tank body independently of the water supply pipe by switching the flow path to a bypass pipe. However, since a power outage occurs during an earthquake, there is a problem in obtaining an operating power source for the valve device that switches the flow paths.

The present invention solves the above problems, and one embodiment thereof will be described below with reference to the drawings.

Reference numeral 1 denotes an aquarium main body formed by connecting a large number of pipe bodies 2 in a U-shape, and is buried underground in a park or the like. Each pipe body 2 is made of a cast iron pipe and has a pipe joint with a detachment prevention structure. Tapered pipes 3 are installed at both ends of the aquarium body 1.
a, 3b are provided, and the inflow pipe section 4 of the existing water supply pipe 4 is connected to the blind flange provided on the tapered pipes 3a, 3b.
a and the outflow pipe section 4b are connected. A bypass pipe line 5 is provided in the water supply pipe line 4 in parallel with the water tank body 1, and valve devices 6 and 7 are provided at the connection parts between the bypass pipe line 5 and the inflow pipe line section 4a and the outflow line section 4b, respectively. ing. These valve devices 6, 7 are comprised of ball valves having 3 ports and 2 positions. The valve device 6 on the inflow side has a position where the inflow pipe section 4a is opened, that is, a position where the ports 6a and 6b are opened, and a position where the port 6a is opened to the port 6c of the bypass pipe 5. The valve device 7 on the outflow side has a position where the outflow pipe section 4b is opened, that is, a position where the ports 7a and 7b are opened, and a position where the part 7c of the bypass pipe 5 is opened to the port 7a. Note that the water tank body 1 is provided with a water supply port at the outflow side end for discharging the water inside.

To explain the valve operating mechanism for operating the valve devices 6 and 7, reference numerals 8 and 9 are a pair of pneumatic actuators. These actuators 8 and 9 have a piston 11 inside a cylinder body 10, and the piston 1
1 is the rotation link 12, 13 in the cylinder body 10
and a link mechanism outside the cylinder body 10, respectively, to the valve devices 6 and 7. One cylinder chamber of the cylinder body 10 is open to the atmosphere through a hole 14, and a return spring 15 is housed inside. The other cylinder chamber has piping 16,
It is connected to a pneumatic circuit 18 via 17.
The pistons 11 of both actuators 8 and 9 are normally located at the chain line position in FIG. 1 due to the restoring force of the spring 15, and in this state, the inflow side valve device 6 is in the operating position where the inflow pipe section 4a is opened. The valve device 7 on the outflow side is in an operating position where the outflow pipe section 4b is opened. The pneumatic circuit 18 is a receiver tank 1 as a pressure accumulator.
The solenoid valve 1 supplies air pressure in the actuator 9 to the actuators 8 and 9, and opens and closes the pipes 16 and 17.
8a and 18b. A compressor 20 supplies air pressure to the receiver tank 19.
The solenoid valves 18a and 19b are connected via a control device 22 to a sensor 21 that detects earthquakes. The control device 22 has an auxiliary power source for operation regardless of a power outage.

With such a configuration, the water in the water supply pipe 4 flows through the aquarium body 1, and water that can be used as a fresh drink is always stored in the aquarium body 1. When the aquarium main body 1 is composed of the pipe body 2, water flows throughout the aquarium main body 1, so that contamination due to water stagnation is more effectively prevented. Also,
If the water tank body 1 is U-shaped, there is an advantage that the installation space can be used effectively.
and valve actuation mechanisms can be centrally located in one place, making it easy to arrange and connect them.
Moreover, by installing these in one protective container, there is an advantage that an earthquake-resistant structure can be easily adopted.

When an earthquake occurs, an activation signal is given to the control device 22 in response to an earthquake detection signal from the sensor 21, and the solenoid valves 18a and 18b are opened. As a result, the air pressure in the receiver tank 19 is supplied to both actuators 8 and 9, and the piston 11 moves to the right in FIG. 1 against the spring 15. As a result, the valve device 6 on the inflow side is switched to the position where the port 6a of the inflow pipe section 4a opens to the bypass pipe line 5, and at the same time, the valve device 7 on the outflow side is switched to the position where the port 6a of the inflow pipe section 4a opens to the bypass pipe section 5. It is switched to a position open to port 7a. Therefore, the inflow and outflow ports of the water tank main body 1 are closed, and clean water inside can be secured as an emergency drink or the like even if the water supply pipe 4 is damaged. Further, since the water in the water supply pipe 4 flows through the bypass pipe 5, it can be used normally until a problem occurs in the water supply pipe 4 or the water supply source equipment. Since the receiver tank 19 is thus configured to operate the valve devices 6 and 7 via the actuators 8 and 9 as a power source, the valve devices 6 and 7 can be reliably operated regardless of a power outage during an earthquake. I can do it.

Note that the sensor 21 may be one that senses the flow velocity in the water pipe 4 instead of one that senses earthquakes. In this case, the electromagnetic valves 18a and 18b are configured to open so that the flow velocity of the water supply pipe 4 reaches a set acceleration.

FIG. 3 shows another embodiment, in which valve devices 23, 24, 25 consisting of three shutoff valves are provided to switch the flow path of the water supply pipe 4. Each valve device 23, 24, 25 is connected to a valve actuation mechanism similar to that in FIG. In this case, the valve devices 23, 24, 2
Three actuators are used to operate 5. In the case of such a configuration, the valve devices 23 of the inflow pipe section 4a and the outflow pipe section 4b are normally operated.
24 is open and the valve device 25 of the bypass line 5 is closed. When an earthquake occurs, the valve devices 23 and 24 of the inflow pipe section 4a and the outflow pipe section 4b are closed, and the valve device 25 of the bypass pipe line 5 is opened.

FIG. 4 shows an embodiment in which the valve operating mechanism is hydraulically configured. Reference numeral 26 designates a valve device that collectively represents the valve devices 6 and 7 shown in FIG. 1 or the valve devices 23, 24, and 25 shown in FIG. 3, and a hydraulic actuator 27 is provided for each valve device. 28 is a hydraulic circuit that supplies hydraulic pressure from the accumulator 29 to the actuator, and 30 is a hydraulic pump. The hydraulic circuit 28 is opened via the control device 22 in response to a signal from the sensor 21, and the valve device 26 is operated in the same manner as in the example shown in FIG.

FIG. 5 shows still another embodiment, in which the water supply pipe 4
In order to perform the switching, a valve device 31 consisting of a three-way switching valve and a two-way switching valve 3 consisting of a two-way switching valve are used.
2 is used. These valve devices 31, 32
is connected to the valve actuation mechanism shown in FIG. 1 or 2. In the case of such a configuration, the valve device 31 of the inflow pipe section 4 is normally open to the water tank main body 1 side, and the valve device 32 is always open. In the event of an earthquake, valve device 3
1 opens toward the bypass pipe 5, and at the same time, the two-way switching valve 32 is shut off. Thereby, the water tank main body 1 can be made independent from the water supply pipe line 4, and the water supply pipe line 4 can also be used independently.

The present invention can be implemented as described above, and according to this, fresh potable water is always kept in the water tank body, and in the event of an earthquake, this water can be used as an emergency water source independent of the water supply pipe. It can be secured as At this time, the water in the water supply pipe flows through the bypass pipe, so it can be used normally until the pipe is damaged. Furthermore, since the valve device that switches the flow path between the water tank body and the bypass pipe is configured to be operated by the fluid pressure of the pressure accumulator via the actuator, it can be operated regardless of a power outage caused by an earthquake. Furthermore, since the valve device is activated by detecting an abnormality such as an earthquake using a sensor, the flow path can be switched without manual intervention.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a water tank according to one embodiment of the present invention, FIG. 2 is a plan view of the water tank body, and FIG. 3 is a plan view showing the relationship between the water tank body and the water pipe in another embodiment. , FIG. 4 is an explanatory diagram of a valve operating mechanism in still another embodiment, and FIG. 5 is a plan view showing the relationship between the water tank body and the water supply pipe in still another embodiment. 1...Aquarium body, 2...Pipe body, 4...Water supply pipe, 4a...Inflow pipe section, 4b...Outflow pipe section,
5... Bypass pipe line, 6, 7... Valve device, 8, 9
... Actuator, 12, 13 ... Rotating link, 15 ... Spring, 18 ... Pneumatic circuit, 19 ...
... Receiver tank, 20 ... Compressor, 21
...Sensor, 22...Control device, 23, 24, 2
5, 26... Valve device, 27... Actuator,
28... Hydraulic circuit, 29... Accumulator,
30... Hydraulic pump, 31, 32... Valve device.

Claims (1)

[Claims] 1. A water tank main body and a bypass pipe are interposed in parallel in a water supply pipe, and a valve device is provided in the water pipe to selectively switch between a flow passage flowing through the water tank body and a flow passage flowing through the bypass pipe, and the above-mentioned an actuator connected to a valve device to operate the valve device; a fluid pressure circuit supplying fluid pressure of a pressure accumulator to the actuator;
A water storage tank characterized in that it is provided with a control device that opens and closes the fluid pressure circuit according to a signal from a sensor.