JPS61151451A - Safety equipment for alkali metal combustion test - Google Patents

Abstract

PURPOSE:To secure safety by preventing the contact of an alkali metal with air, by hermetically closing a chamber in which an alkali metal combustion testing apparatus was received and sealing said chamber with inert gas. CONSTITUTION:If the alkali metal 7 in an alkali metal combustion testing apparatus 5 is contacted with invaded air, said alkali metal is reacted with air to generate heat and, if said alkali metal is contacted with water penetrated by the deterioration of the material of a cooling part, heat and hydrogen are generated by reaction. Therefore, a chamber 1 is hermetically closed and sealed with inert gas 6 to prevent the contact of the alkali metal with air and water. Further, as a measure when hydrogen is generated, a rupturable plate 2 ruptur ing under definite pressure or more and a heat absorbing material 4 absorbing heat upon melting under definite temp. are mounted to the upper part of the hermetically closed container 1 at the part communicated with a chimney 3. This heat absorbing material 4 immediately extinguishes the fire occurring in the hermetically closed chamber 1 by the melting thereof at the time of abnormality.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to safety equipment for conducting combustion tests of alkali metals used as heat sources for underwater vehicles and the like.

(Technical background) Alkali metals are extremely active substances, and if they are brought into contact with water, a large amount of water and hydrogen will be generated.
Although it has a significant impact on the environment, there have been no tests to date in which large amounts of alkali metals are combusted (this refers to the exothermic reaction between alkali metals and other substances). There were no safety measures taken during the combustion test.

(Problems to be Solved by the Invention) The present invention seeks to provide safety equipment for this type of testing device.

(Means for Solving the Problems) That is, the present invention provides a sealed chamber filled with an inert gas and in which an alkali metal combustion test device can be installed, a chimney connected to the sealed chamber via a rupture disc, and the alkali metal combustion test device. The present invention relates to safety equipment for alkali metal combustion tests, characterized in that an endothermic material is attached to the upper part of a closed chamber in which a metal combustion test device is located.

Hereinafter, one embodiment of the present invention will be described with reference to FIG.

In Figure 1, 1 is a closed room, 2 is a rupture plate, 3 is a chimney,
An example of the alkali metal combustion test apparatus 5 is shown in FIG. 2, where 4 is an endothermic material, 5 is an alkali metal combustion test apparatus, and 6 is an inert gas.

In FIG. 2, 7 is an alkali metal, 8 is an oxidizing agent (for example, rogens gas), 9 is water, 10 is a cooling section, and 11 is heated water or steam.

If the alkali metal 7 of the alkali metal combustion test device 5 in the equipment shown in FIG. It also reacts on contact with, producing heat and hydrogen.

For this reason, in the present invention, the chamber is sealed and an inert gas is filled inside to prevent contact between the dialkali metal and the air.Furthermore, as a countermeasure against generation of heat and hydrogen due to water, In the part leading to the chimney 3, there is a rupture disc 2 that ruptures when the pressure exceeds a certain level (this can be made of any material as it does not come into direct contact with alkali metals), and an endothermic material 4 that melts and absorbs heat at a certain temperature ( A metal material (for example, stainless steel powder) that does not react with alkali metals and does not become an oxide is provided in the upper part of the sealed chamber 1. It has been confirmed through experiments that this endothermic material 4 melts in the event of an abnormality (when heat is generated), so that the interior of the sealed chamber 1 has the ability to immediately extinguish ignition.

The equipment of the present invention can produce a very remarkable industrial effect in that appropriate measures can be taken to quickly generate heat and hydrogen without causing any damage to equipment inside or outside the closed room.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the equipment of the present invention, and FIG. 2 shows an example of an alkali metal combustion test apparatus. Sub-agents 1) Meifuku agent Ryo Hagiwara -

Claims (1)

[Claims] A sealed chamber filled with inert gas and in which an alkali metal combustion testing device can be installed, a chimney connected to the sealed chamber via a rupture disc, and an endothermic material above the sealed chamber where the alkali metal combustion testing device is located. Safety equipment for alkali metal combustion tests, characterized by the fact that it is equipped with a.