SU1643861A1 - Safety device for railroad tank for liquified gas - Google Patents

Abstract

This invention relates to the transport of liquefied gas. The goal is to increase safety and simplify the device. The device contains placed on the fitting a safety valve and diaphragms connected by a pipe with an expansion vessel, as well as air and signal devices. One of the membranes - the main one is made of elastic material and at the same time serves as a seal. Behind it is an additional membrane, having the shape of a truncated cone and made of metal. This membrane regulates the hydraulic resistance. Both membranes are installed in front of the signaling device and the smaller base of the truncated cone faces in its direction. The expansion vessel is located above the tank and its volume is 1.25-1.5% of the volume of the tank. 1 hp f-ly, 3 ill.

Description

This invention relates to railway transport.

The purpose of the invention is to increase safety and simplify with volatile accidental emissions into the atmosphere of both liquid and gaseous products.

FIG. 1 shows a part of a railroad tank car, torn, side view of the device without cuts; in fig. 2 - tank and device, top view; in fig. 3 - membrane unit of the device.

The safety device comprises a tank 1, a manhole 2 with a cover 3 and a fitting 4 placed on the tank 1. A membrane unit 5 and an angular spring safety valve 6 are connected in series to fitting 4.

A horizontal cylindrical expansion vessel 7 placed above the tank 1 is additionally connected to the outlet nipple of the safety valve 6, and a tap (nipple) 8 is connected to the upper part of the vessel 7 with the alarm device 9 connected (for example, a signal whistle or siren) and the air 10.

An additional membrane 11 in the form of a truncated cone and the main membrane 12 of rubber or polyethylene are installed between the signal device 9 and the air 10 (their flanges).

The device works as follows.

When the tank is exposed to sunlight and the valve 6 is opened, the membrane 12 is torn, and the gas flows through the hole in the membrane 11 and then through the vent 10 to the atmosphere. In the event of a fire near the tank, the membrane 12 is first ruptured, and then, if the pressure exceeds (12.75 kgf / cm2, the membrane 11 is destroyed, and the gas enters the atmosphere over the complete air section 10.

Liquid or gas from the tank 1 through the nozzle 4 when the diaphragm 12 and the safety valve 6 are actuated enters the expansion vessel 7, where it creates back pressure and thereby reduces the amount of gas discharged from the safety valve 6 Next, the gas enters the alarm

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device 9 (signal whistle or siren) is emitted into the atmosphere through the air 10. The sound produced by the signal device 9 is recorded by the driver or conductor, after which measures are taken to eliminate the accident.

The expansion vessel has a volume of 1.25-1.5% of the capacity of the tank, which is sufficient for the safety of managing the gas during an accidental release.

The expansion vessel is placed above the tank to enable monitoring of the device during operation on the railway.

Claims (2)

1. A safety device for a tank with a liquefied gas, mainly railway, containing 1 LF fl rinVJIVI DLHV / l / W, -wr --- .., -f -, --.-, - г -. ( The proposed device reduces the hazardous The ability to injure and poison a person with a sudden volley release of a product from a railway tank into the atmosphere in an emergency situation, when a safety valve is activated. The amount of product discharged decreases and disperses. In addition, an emergency is signaled by the product being ejected. The presence of two membranes allows a metered valve and a membrane connected by a pipe to an expansion vessel on which an air line and a signaling device are installed, characterized in that, in order to increase safety and simplify the device, it is equipped with an additional membrane installed after the main one. alarm device, the main membrane is made of elastic material, additional there is a back pressure behind the valve 6, so the membrane 20 has the shape of a truncated cone, As the membrane 11 has the form of a confuser, which can vary in length and angle at the apex, i.e. hydraulic resistance, and the membrane 12 of elastic material is a gasket in the joint. By its rupture can be judged minor leaks through the safety valve. 25 facing a smaller apex in the direction of the signaling device, and is made of metal, and the expansion vessel is placed above the tank. 2. A device according to claim 1, characterized in that the volume of the expansion vessel is 1.25-1.5% of the volume of the tank. The expansion vessel is placed above the tank to enable monitoring of the device during operation on the railway. Invention Formula 1. A safety device for a tank with a liquefied gas, mainly rail, containing -wr --- .., -f -, --.-, - g -. (  proprietary safety fitting 0 bridged on safety fitting a valve and a membrane connected by a pipe to an expansion vessel on which the air is installed and a signaling device, characterized in that, in order to increase safety and simplify the device, it is equipped with an additional membrane installed after the main one, while the membranes are placed in front of the signaling device, the main membrane made of elastic material, optional 20 the membrane has the shape of a truncated cone, the membrane has the shape of a truncated cone, facing a smaller apex in the direction of the signaling device, and is made of metal, and the expansion vessel is placed above the tank. 2. A device according to claim 1, characterized in that the volume of the expansion vessel is 1.25-1.5% of the volume of the tank. 1 JTU / 9/7 / 2 FIG.