| 摘要 |
PURPOSE:To prevent strong pressure that may cause explosion from being applied to the inside of a pressure chamber by providing the surface of a blocking plate with notches each of which is very small in width and which constantly communicates the pressure chamber with the outside. CONSTITUTION:A metallic bottomed inner tube 2 is fitted into a metallic bottomed outer tube 1 and the peripheral edge of a blocking plate 3 which is formed by extension of the peripheral edge of the opening of the inner tube 2 is wound twice and fastened to the peripheral edge of the opening of the outer tube 1 and the space between the inner tube 2 and the outer tube 1 is used as a pressure chamber 4 and notches 5 each of which is very small in width and which constantly communicates the pressure chamber 4 with the outside are provided through the surface of the blocking plate 3. Quick lime is enclosed in the pressure chamber 4 and a chemical in the inner tube 2 and water is brought into contact with the quick lime through a hole provided in the bottom of the pressure chamber 4 and causes an exothermic reaction and thereby the inner tube 2 is heated and the chemical in the inner tube 2 is diffused as smoke. In this case, the internal pressure of the pressure chamber 4 is allowed to escape from each of the notches 5 little by little within such a range as to prevent a great loss of the quantity of heat, thereby eliminating the danger of explosion. |
