Structure enabling drainage cap plug to be reliably and fixedly attracted on shell and using method of structure

Abstract

The invention relates to a structure enabling a drainage cap plug to be reliably and fixedly attracted on a shell and a using method of the structure. The structure comprises the steel shell, the drainage cap plug, a drainage pipe and a water-bath inner container. The drainage cap plug comprises a plunger, a matching shaft neck section, an exposed cap body and magnetic blocks, the plunger and the exposed cap body are arranged at two ends of the matching shaft neck respectively, and the magnetic blocks are inlaid in the inner side face of the exposed cap body. The plunger on the drainage cap plug is plugged into an inner hole of the water outlet end of the drainage pipe to enable the drainage cap plug and the drainage pipe to be in hermetical connection, the matching shaft neck section on the drainage cap plug is plugged and sleeved in a fixing through hole of the steel shell, the exposed cap body on the drainage cap plug is propelled towards the steel shell manually, and the magnetic blocks inlaid in the inner side face of the exposed cap body are automatically fixedly attracted on the steel shell by depending on magnetic force, therefore unplugging and plugging between the plunger and the inner hole of the drainage pipe are facilitated, a sealing effect is more reliable, leakage between the plunger and the drainage pipe can be eradicated completely, and the defect that a thermostatic water bath control system is short-circuited and burnt out due to water leakage in the prior art is overcome.

Description

Technical field: [0001] The invention relates to a constant temperature water bath test instrument, in particular to the drainage structure of the water tank in the constant temperature water bath, and in particular to the connection mode between the drain cover plug and the box shell. Background technique: [0002] The constant temperature water bath is an instrument water tank, which is mainly used for distillation, drying, concentration, and warming of chemicals or biological products in the laboratory. It can also be used for constant temperature heating and other temperature tests. It is a biological, genetic, virus, aquatic, It is an essential tool for environmental protection, medicine, sanitation, laboratory, analysis room, education and scientific research. The shell of the existing constant temperature water bath is made of cold-rolled steel plate, the surface is baked paint, the inner tank of the water bath is made of stainless steel, the middle layer is insulated...

AI Technical Summary

Problems solved by technology

Although it makes sense in principle, because the installation space in the steel shell 1 is very small, the drain pipe 3 arranged therein forces the drain cover plug 2 to move outwards under force, and then the exposed cover of the drain cover plug 2 will The body 23 is separated from the surface of the shell, which affects the appearance quality of the product and reduces the purchase price of the product.

At the same time, since the plunger 21 on the drain cover plug 2 and the inner hole of the drain pipe are in a line contact sealing structure, as long as the joint between the drain pipe and the plunger 21 is subjected to an undirectional external force, water seepage may occur at the sealed joint. If the water seeps and leaks the control circuit part, the whole control circuit will be burnt out. At the same time, water seeps slowly from the drain cover plug 2, which will cause the steel shell 1 to be damp and rust

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