Constant-temperature heating device for heat treatment of weld joints of short pipe plugs and plug plates

A short pipe plug and plug plate weld joint heat treatment constant-temperature heating device comprises an auxiliary heating pipe, the auxiliary heating pipe is fixedly connected with a plug or a plug plate, and the length of the auxiliary heating pipe is matched with that of a short pipe so that short pipe plug and plug plate weld joint heat can be located in the center of a heater. According tothe utility model, the weld joint is at the highest temperature in the heat treatment process, the short pipe is ensured not to be overheated, the hardness and the mechanical property of the weld joint are in a better state, and more than 200 alloy steel blocking plates and plugs are qualified at one time in the process. 一种短管堵头、堵板焊缝热处理恒温加热装置，所述加热装置包括辅助加热管，所述辅助加热管与堵头或堵板固定连接，所述辅助加热管的长度与短管适配使得短管堵头、堵板焊缝热位于加热器中心位置。本实用新型使焊缝在热处理过程中处于最高温度，保证了短管不超温，焊缝的硬度和机械性能处于较佳状态，过程中200多道合金钢堵板、堵头一次合格。