A flame front in a gas pipeline is extinguished by introducing an extinguishing agent at an overpressure at an extinguishing zone of the pipeline. Using an overpressure provides a better and finer atomization of the extinguishing agent, and permits a greater amount of the extinguishing agent to be provided in the extinguishing zone per unit time. In addition, a sealing fluid is introduced at sealing zone of the pipeline. Gas flowing through the pipeline must flow through the sealing fluid in the sealing zone. Preferably, movement of a flame front from one side of the sealing zone to the other side of the sealing zone is prevented or reduced by the sealing fluid.

An internal pressure adjustment system includes a gas supply line that supplies incombustible gas to a housing space of a robot, and an exhaust line that exhausts gas from the housing space. The internal pressure adjustment system further includes an on-off valve of a gas pressure driven type that switches between opening and closing of the exhaust line in accordance with the gas supply pressure. The exhaust line is opened in response to an increase in the gas supply pressure and the exhaust line is closed in response to a decrease in the gas supply pressure.

An internal pressure adjustment system includes a gas supply line that supplies incombustible gas to a housing space of a robot, and an exhaust line that exhausts gas from the housing space. The internal pressure adjustment system further includes an on-off valve of a gas pressure driven type that switches between opening and closing of the exhaust line in accordance with the gas supply pressure. The exhaust line is opened in response to an increase in the gas supply pressure and the exhaust line is closed in response to a decrease in the gas supply pressure.

When using oxygen gas pipes 3, situations can arise, in particular due to slag return and similar dangers, in which the operator must initiate safety measures. Slag return safety devices are known which, in such a case, ensure that the gas flow is stopped by melting a cap 35 of a heat sensor 5. The response of this outlet valve 6 of the slag return safety device can be recognized, for example, by the fact that the inlet pressure of the existing oxygen gas 4 is used to push pins 21 located in the wall 19 of the oxygen gas pipe 3 beyond the outside 27 of the oxygen gas pipe 3, so that they cannot be overlooked as a warning signal. The movement of the pins 21 can be used to activate further signal systems 30 in order to provide additional indications of this movement optically and/or acoustically.

When using oxygen gas pipes 3, situations can arise, in particular due to slag return and similar dangers, in which the operator must initiate safety measures. Slag return safety devices are known which, in such a case, ensure that the gas flow is stopped by melting a cap 35 of a heat sensor 5. The response of this outlet valve 6 of the slag return safety device can be recognized, for example, by the fact that the inlet pressure of the existing oxygen gas 4 is used to push pins 21 located in the wall 19 of the oxygen gas pipe 3 beyond the outside 27 of the oxygen gas pipe 3, so that they cannot be overlooked as a warning signal. The movement of the pins 21 can be used to activate further signal systems 30 in order to provide additional indications of this movement optically and/or acoustically.

An outdoor energy storage system cabinet and an outdoor energy storage system are provided. The cabinet includes a cabinet body, a water firefighting system, and a gas firefighting system. The water firefighting system includes a water firefighting pipe. The water firefighting pipe is arranged at a top part of an interior of the cabinet body and is provided with a water nozzle. The gas firefighting system includes a gas firefighting pipe. The gas firefighting pipe, like the water firefighting pipe, is arranged on the top part of an interior of the cabinet body. The gas firefighting pipe is configured to contain a firefighting fire extinguishing agent or transport the firefighting fire extinguishing agent. The gas firefighting pipe is provided with an air nozzle for ejecting firefighting gas generated by the firefighting fire extinguishing agent.

An outdoor energy storage system cabinet and an outdoor energy storage system are provided. The cabinet includes a cabinet body, a water firefighting system, and a gas firefighting system. The water firefighting system includes a water firefighting pipe. The water firefighting pipe is arranged at a top part of an interior of the cabinet body and is provided with a water nozzle. The gas firefighting system includes a gas firefighting pipe. The gas firefighting pipe, like the water firefighting pipe, is arranged on the top part of an interior of the cabinet body. The gas firefighting pipe is configured to contain a firefighting fire extinguishing agent or transport the firefighting fire extinguishing agent. The gas firefighting pipe is provided with an air nozzle for ejecting firefighting gas generated by the firefighting fire extinguishing agent.

According to an exemplary embodiment, an inerting and pressurization system for a fuel tank may be provided. The inerting and pressurization systemmay include an inert gas supply network, a number of valves and a number of air separator modules. The inerting and pressurization system may further include a programmable controller that may automatically increase the proportion of inert gas in the inert gas supply network. According to a second exemplary embodiment, a fire extinguishing system may include a number of air-separation modules that may supply an inert gas to a supply network and a programmable controller that may be operatively connected with the inert gas supply network to control how the inert gas outputs may be distributed in response to a fire threat signal.

A multiply-redundant system that protects fueling of rockets, aircraft and other vehicles using Liquefied Natural Gas (LNG) along with an oxidizer such as Liquefied Oxygen. One or more sensors in combination with one or more optional microswitches combine to detect any leaks, fire or explosion hazards quickly locking out further fueling. For different levels of safety, different combinations of sensors can be used.

An electronic fire suppression method that transmits a frequency wave pattern of electromagnetic wave(s) having particular frequencies, powers and durations configured to separate and isolate components of combustion so as to suppress and extinguish the fire. A device for implementing this method of fire suppression includes a power supply and an electromagnetic wave transmitter. The electromagnetic wave transmitter is capable of transmitting frequency wave patterns having the defined frequencies, powers and durations. The device may also include one or more frequency receivers, analyzers, and controllers for detecting, analyzing, and targeting operating frequencies of a fire.