Electric heater of vehicle hook of middle buffer vehicle hook

Abstract

The heater comprises a heating component (3) that is placed in a recess in the coupling head (1) and covered towards the outside. The recess is precision fitted to the diameter of the heating component such that it is removably affixed to the coupling head. The linear recess is oriented parallel to the faceplate (2) of the coupling head.

Description

technical field [0001] The invention relates to an electric heater for a coupler head of an intermediate buffer coupler. Background technique [0002] In the ET420 series express train-EMU, the intermediate buffer coupler is used, in which a roughly semicircular groove is arranged on the buffer surface of the coupler head within the range of the centering cone and the guide orienter, and the electric heating body is embedded in the buffer surface. inside the tank. In winter, the electric heating body will avoid ice or snow accumulation on the end face and coupler mechanism. The grooves are closed externally with hard solder, which forms part of the buffer surface. Since there will be a danger of damaging the heating body when the processing temperature is high, only low-melting hard solders such as expensive silver solders can be used as hard solders. Since the required heating power would reach the melting point temperature of the soft solder, it has not proven suitable ...

AI Technical Summary

Problems solved by technology

Due to the poor thermal conductivity λ=0.21W / (m×K) and the poor heat resistance of the elastic casting materials obtained and used hitherto, an overheating of the heating body would result, which would lead to damage of the casting material and thus damage to the heater

Moreover, the surface strength of such casting materials is very low, so there is a risk of intrusion of foreign bodies and consequently a risk of mechanical damage to the heating body

[0005] In addition, the disadvantage of the above-mentioned design structure is that since the spiral tube heating body is usually used, the failed heating body can only be replaced by removing the brazing seam and casting material at a great cost in the manufacturing plant or repair shop.

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