| 简介 |
PROBLEM TO BE SOLVED : To solve problems that since a conventional hose for steam sterilization of the soil is molded from a thermoplastic resin material, the hose is readily deteriorated with heat by an increase in steam temperature to 100°C or above, and cracks are generated by vibration of the hose as a result of a change of the steam flow in the hose into a turbulent flow or entry of earth and sand from holes of the hose, closing of steam jetting holes and deterioration of uniform feed conditions of the steam.
SOLUTION : The hose of a triple structure is obtained as follows. An outer peripheral hose is provided with slits for jetting steam at a prescribed interval and a canvas hose of a sail cloth is inserted into a part of the steam inflow side of the outer peripheral hose. An intermediate hose made of a thermoplastic resin material and having holes is provided between the outer peripheral hose and the canvas hose.
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