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针对防爆电气设备外壳现有工艺存在的缺陷,作者对矩形隔爆外壳试验研究了无模胎液压定形增强工艺。其特点是将传统工艺中的回火处理改为液压定形,即将液体经节流阀注入焊接后的隔爆外壳,最高压力为水压试验额定值的1.2～1.5倍,保持一定时间再将液体排出,反复数次即可。这种新工艺增强外壳强度,减少其受压变形量,尤其是隔爆面变形量,提高隔爆安全性能,具有明显的经济技术效益。
In view of the defects of the existing technology of the explosion-proof electrical equipment shell, the author has studied the rectangular foam explosion-proof shell experiment and studied the die-less hydroforming technology. It is characterized by the traditional process of tempering to hydroforming, the liquid will be injected into the valve through the throttle after the flameproof enclosure, the maximum pressure of hydraulic test rating of 1.2 to 1.5 times, to maintain a certain time and then the liquid Discharge, repeat several times. This new technology to enhance the shell strength, reduce the amount of compression deformation, especially the deformation of explosion-proof surface, improve flameproof safety performance, with obvious economic and technical benefits.