The present disclosure relates to a field of soil-covered tank and includes a gas collecting and exhausting unit, a safety sealing unit and a closed-loop ventilation unit; a gas collecting pipe is located in a valve chamber and a channel, and the gas collecting pipe, a fan and an exhaust pipe are connected in sequence; a gas monitor of the safety sealing unit is used for monitoring concentration of combustible gases, a controller is connected to the gas monitor, a temperature sensor, a valve and a fan by conducting wires, and the controller set a warning temperature value and a warning gases concentration value and is capable of controlling actions of the valve and the fan; and the closed-loop ventilation unit is formed among a plurality of gas collecting and exhausting units.

To provide a vapor recovery device capable of making the most of the capacity of the adsorption/desorption towers and efficiently adsorbing and desorbing fuel oil vapor. A vapor recovery device 1 having: a pump 5 disposed on a pipe 4 branched from a vent pipe 3, one end of which being connected to an underground tank 2, to suck a fuel oil vapor V in the underground tank; a condenser 6 connected, on the branch pipe, to a downstream side of the pump to condense the fuel oil vapor; and a plurality of adsorption/desorption towers 7a, 7b, 8a, 8b connected, on the branch pipe, to a downstream side of the condenser in series to adsorb/desorb fuel oil vapor fed from the condenser. One of the adsorption/desorption towers can be arranged above another one of remaining adsorption/desorption towers, and the pump may be fixed in a housing 30 through a bottom face and a side face of the pump and elastic bodies 32, 33.

A method for controlling purging of hydrogen from a hydrogen circuit system of a vehicle, the hydrogen circuit system having a hydrogen conduit being arranged in fluid communication with at least one hydrogen tank, the method being implemented by a hydrogen control system comprising at least one processing circuitry, the method comprising deactivating one or more vehicle functions and vehicle systems into a non-ignitable state in response to a control signal indicative of a request for purging the hydrogen circuit system, and performing purging of the hydrogen circuit system when the one or more vehicle functions and vehicle systems are set into the non-ignitable state.

A method for controlling purging of hydrogen from a hydrogen circuit system of a vehicle, the hydrogen circuit system having a hydrogen conduit being arranged in fluid communication with at least one hydrogen tank, the method being implemented by a hydrogen control system comprising at least one processing circuitry, the method comprising deactivating one or more vehicle functions and vehicle systems into a non-ignitable state in response to a control signal indicative of a request for purging the hydrogen circuit system, and performing purging of the hydrogen circuit system when the one or more vehicle functions and vehicle systems are set into the non-ignitable state.

It is object of the invention to reduce the technical expenditure for refilling of gas bottles. For solving the problem, a claimed fitting comprises a gas tap for gas withdrawal and an opening for refilling a liquid gas bottle. The opening for refilling a liquid gas bottle can be connected, in particular by opening a valve, in a gas-conducting manner to a hose-shaped or tubular line of the fitting, which can extent into a liquid gas bottle by at least 300 mm, preferably at least 400 mm, if the fitting is connected with such a gas bottle. Hereby, it can achieved that the line extents into the liquefied part of the gas, which especially enables a very fast emptying though pumping. Emptying is necessary when a refilled gas bottle proves to be untight. A speed advantage is thereby achieved. Basically, there is an opening at the bottom side of the fitting adjacent to the hose-shaped or tubular line. The bottom side is the side, which adjoins the liquid gas bottle or respectively is arranged entirely in the bottle or in a bottle neck when the fitting is connected to a liquid gas bottle. This opening at the bottom side can be connected to the gas tap in a gas-conducting manner, specifically typically by rotating a corresponding rotary handle. The hose-shaped or tubular line protrudes relative to the opening, specifically in particular by at least by 200 mm, particularly preferred by at least 300 mm. A method concerns the refilling of a liquid gas bottle comprising the claimed fitting.

It is object of the invention to reduce the technical expenditure for refilling of gas bottles. For solving the problem, a claimed fitting comprises a gas tap for gas withdrawal and an opening for refilling a liquid gas bottle. The opening for refilling a liquid gas bottle can be connected, in particular by opening a valve, in a gas-conducting manner to a hose-shaped or tubular line of the fitting, which can extent into a liquid gas bottle by at least 300 mm, preferably at least 400 mm, if the fitting is connected with such a gas bottle. Hereby, it can achieved that the line extents into the liquefied part of the gas, which especially enables a very fast emptying though pumping. Emptying is necessary when a refilled gas bottle proves to be untight. A speed advantage is thereby achieved. Basically, there is an opening at the bottom side of the fitting adjacent to the hose-shaped or tubular line. The bottom side is the side, which adjoins the liquid gas bottle or respectively is arranged entirely in the bottle or in a bottle neck when the fitting is connected to a liquid gas bottle. This opening at the bottom side can be connected to the gas tap in a gas-conducting manner, specifically typically by rotating a corresponding rotary handle. The hose-shaped or tubular line protrudes relative to the opening, specifically in particular by at least by 200 mm, particularly preferred by at least 300 mm. A method concerns the refilling of a liquid gas bottle comprising the claimed fitting.

A multifunction valve for a flange of a high pressure hydrogen tank for a fuel cell automotive system having a one-piece ejector body applicable to a head surface of a valve body is provided.

An integral side slope structure of a soil-covered tank, includes a tank body, connecting pieces, and reinforcing frameworks. The exterior of the tank body is completely covered with soil, and a side slope is formed after the tank body is covered with the soil; each connecting piece is composed of ribs which are in cross connection to each other; the connecting pieces are connected to the outer wall of the tank body and are laid inside the side slope in the horizontal direction; a single-layer connecting net is formed after a single layer of the connecting pieces is connected to the tank body; a plurality of layers of the connecting pieces are arranged at intervals in the vertical direction; the tank body and the side slope are connected by the multi-layer connecting net to form an integral structure; the reinforcing frameworks are arranged along the side slope.

An integral side slope structure of a soil-covered tank, includes a tank body, connecting pieces, and reinforcing frameworks. The exterior of the tank body is completely covered with soil, and a side slope is formed after the tank body is covered with the soil; each connecting piece is composed of ribs which are in cross connection to each other; the connecting pieces are connected to the outer wall of the tank body and are laid inside the side slope in the horizontal direction; a single-layer connecting net is formed after a single layer of the connecting pieces is connected to the tank body; a plurality of layers of the connecting pieces are arranged at intervals in the vertical direction; the tank body and the side slope are connected by the multi-layer connecting net to form an integral structure; the reinforcing frameworks are arranged along the side slope.

A cryogenic tank arrangement includes a tank body enclosing a storage space for storing liquefied gas. The tank arrangement has a safety valve arrangement in which at least one pressure relief valve is directly connected to the storage space of the tank body. There is a pressure relief valve arranged directly connected to at least two locations on a same face of the tank body.