JP2001325683A - Gas safety system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wrong cutoff state that is caused by the impact vibrations, etc. SOLUTION: A safety center 4 transmits and receives the earthquake information via a communication means 2 and then transmits the cutoff signals to plural gas safety devices A-N to break each cutoff valve when identity is confirmed among those collected earthquake information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas security system for a gas security device used in a gas supply path.

[0002]

2. Description of the Related Art In recent years, for the purpose of safely using city gas and LP gas, the amount of fuel gas (hereinafter referred to as gas) has been measured and abnormally increased.
2. Description of the Related Art A security device that shuts off a gas passage when it is detected that the device has been used for a time greatly separated from a normal use condition has been widely used.

[0003] This type of security device takes a detection signal of a gas flow rate into a security control circuit, processes the signal by an internal microcomputer, monitors the gas flow rate, outputs a shut-off signal if there is an abnormality, and closes the shut-off valve. I do.

[0004] In response to a demand for further improvement in security, a vibration sensor is mounted to perform earthquake detection, and an earthquake blocking function that operates when a predetermined seismic intensity is exceeded is often added.

[0005]

A seismic discrimination is performed based on the output signal pattern of the vibration sensor, and measures are taken to prevent erroneous shutoff due to unnecessary vibration such as application of a shock. However, erroneous shutoff is performed depending on the installation conditions of the security device. In some cases, contradictory performances have been required in which seismic vibrations can be reliably captured but unnecessary vibrations are not detected.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a plurality of gas security devices having two-way communication means, and a network between the gas security device and a security center. When the earthquake information comes up with a security center that has enabled any two-way communication with any of the security devices, the security center requests the earthquake information from multiple other gas security devices and sends If they are the same, a shutoff signal is sent back to all gas safety devices on the network to shut off each gas safety device. ing.

[0007]

According to the first aspect of the present invention, when earthquake information is sent to a security center, the security center refers to the earthquake information of a plurality of gas security devices around the transmission source, and checks the area,
Only when the time is the same, it is determined that the earthquake is an earthquake, and is distinguished from the vibration information by the single impact application.

According to the second aspect of the present invention, since no shut-off is required when the gas is not used, the shut-off is individually determined by judging whether or not there is a flow signal of each gas safety device.

According to the third aspect of the present invention, in order to avoid the risk of uninterruption due to a failure of the communication means, if there is no response within a predetermined time, it is determined that communication is abnormal, and the gas is determined based on its own earthquake information. Priority should be given to shutting off the security device alone.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a gas security system according to Embodiment 1 of the present invention. When an earthquake detecting means 1 built in a certain gas security apparatus A detects a predetermined vibration, an earthquake is detected through a communication means 2. The information is transmitted to the network 3.

When the communication means 2 of the security center 4 receives the earthquake information on the network 3, the information processing device 6 sends the information to a plurality of other gas security devices B to N via the communication means 2 in accordance with a predetermined area combination. Request earthquake information.

If the earthquake information transmitted in response to the request is limited to the gas security device A, it is determined that the vibration is a single impact vibration, and no cutoff signal is returned. If they have the same identity, it is determined that there is an earthquake, and a shutoff signal is collectively returned to the network 3.

As an example of the gas security system, safety is given the highest priority, and all the gas security devices under the network immediately perform the shutoff operation in response to the shutoff signal.

Further, among the gas security devices under the network, only those whose gas flow rate is detected perform the shut-off operation.

If the earthquake information is limited to the gas security device A, a signal that does not need to be shut off is returned only to the gas security device A, and the earthquake information of the gas security devices A to N has the same area and time. In this case, it is determined that an earthquake has occurred, and a shutoff signal is collectively returned to the network 3. When the gas safety device A receives the shut-off signal, it performs the shut-off operation. However, even if there is no response from the security center within a predetermined time, the gas safety device A performs the shut-off operation according to its own earthquake information, and the danger of non-interruption due to failure of the communication means Avoid sex.

[0017]

(1) As described above, according to the present invention, seismic information and vibration information due to impact can be distinguished, and erroneous interruption due to unnecessary vibration can be avoided, so that convenience is secured without impairing security. You.

(2) Since the gas safety device does not perform the shut-off operation when the gas is not used, the number of safety confirmation objects at the time of shut-down recovery is reduced, and the recovery work is accelerated.

(3) When the communication line is disconnected due to an earthquake, the communication line is cut off based on its own earthquake information, so that an excellent effect that security is not impaired is exhibited.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a gas security system according to a first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earthquake detection means 2 Communication means 3 Network 4 Security center A to N Multiple gas security devices

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J071 AA02 BB11 CC01 DD36 EE02 EE06 FF03 5C087 BB11 BB46 BB74 CC46 DD02 DD07 DD33 EE07 EE18 FF01 FF04 GG07 GG30 GG70

Claims (3)

[Claims] 1. A network is constructed between a plurality of gas security devices having an earthquake detection means and a two-way communication means and a plurality of gas security devices in the previous period to enable two-way communication with an arbitrary gas security device. A system including a security center, wherein when earthquake information is sent from a certain gas security device to the security center, the security center requests earthquake information from a plurality of other gas security devices, and outputs a plurality of earthquake information. If there is an identity, a gas security system having a procedure of returning a shutoff signal to all gas safety devices on the network to shut off individual gas passages. 2. The gas security system according to claim 1, wherein only one of the plurality of gas security devices that has received a shutoff signal from the security center detects a gas flow rate and performs a shutoff operation. 3. The security center is a system which always returns to the transmission source whether the received earthquake information needs to be shut off or not to be shut off. 3. The gas security system according to claim 1, wherein a shutoff operation is performed according to its own earthquake information if there is no reply within a time.