The Water Tank Emergency Shutoff System (emergency shutoff system (1), and control panel (2) containing an earthquake sensor)
When it detects an earthquake, the Water Tank Emergency Shutoff System seals the outlet valve of a water reservoir to prevent water loss from broken pipes and preserve water for post-disaster use.
During an earthquake, the emergency shutoff valve system seals the outlet valve of a water storage tank to prevent water loss from broken pipes and preserve water for use after the disaster. When the earthquake sensor detects acceleration above a set value during an earthquake, it triggers a signal to close the valve. In past earthquakes, some water storage tanks failed to retain their water supply due to ruptured pipes. This mechanical earthquake sensor system is a product of our fifty years of experience and expertise as inventors of earthquake detectors. Due to its recognized reliability, these sensors are currently installed in public facilities, hospitals, and buildings across Japan.
The earthquake sensor (V-756) used in control panels.
The Mechanical Earthquake Sensor VIB-LINE
The system uses the Mechanical Earthquake Sensor VIB-LINE, which has been used for many years as part of the earthquake sensors for elevators and other devices. As its name suggests, mechanical earthquake sensors detect earthquakes without relying on electricity, thus minimizing energy consumption.
The sensitivity levels of the VIB-LINE can be customized upon request when placing an order. Additionally, the activation threshold levels of the magnetic earthquake sensor mechanism can be checked on-site after completing installation to ensure that the sensor works properly.
Control panel (close-up of the reset function)
User-Friendly Even in Emergency Situations
Once the motorized valve is triggered by a signal from the sensor, it will cut off the water supply. The control panel is equipped with backup power ensuring that, for a set period, the valve can continue normal operation in the event of an earthquake occurring during a power outage.
The lights on the control panel indicate the status of the earthquake sensor, and valve and recovery procedures can be carried out from the control panel, making it easy for anyone to use. During an emergency, the valve can be opened or closed manually with a wrench, and external output circuits can also be added to control devices other than valves, such as pumps.
Various types of VIB-LINE seismic sensors for use in a range of emergency shutoff systems in elevators, boilers, and gas equipment
Ensuring Access to Water
It is estimated that a person needs at least three liters of water per day to survive. After the Great Hanshin-Awaji Earthquake, water was a priority for survivors and many water tanks were able to supply continued access to water. However, some water leakage occurred due to damage to water tanks and piping systems. In response to this, the Ministry of Land, Infrastructure, Transport, and Tourism enhanced its guidelines for examining the earthquake resilience of water reservoirs and installing emergency shutoff systems to ensure access to water even in the case of a disaster.
The tanks are equipped with a control panel to monitor earthquakes and manage equipment, a shutoff valve to secure the water supply in case of an earthquake, and systems other than our own, such as a water level detection system.