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一种防爆领域用的平板全无启无碎片背压托架，是由在金属板上加工带有连桥的环形通缝和托板所构成．其特征是在被环形通缝所包围的圆形金属板上，位于通过连桥中点的环形通缝中心线的两侧，开有数条由连桥向环形通缝中心方向散射的放射状助开启通缝．连桥的弦长占环形通缝长度的２％～１０％，放射状助开启通绝与通过连桥中点的环形通缝中心线的夹角为１０～２０”．优点是泄放面积大，抗背压能力高，结构简单．
An explosion-proof area with no flat plate no Kai no debris back pressure bracket is formed by the processing of metal plates with a bridge with the annular through-seam and pallet form. The utility model is characterized in that on the circular metal plate surrounded by the annular through seam, the two sides of the center line of the annular through seam passing through the midpoint of the connecting bridge are provided with a plurality of radial auxiliary openings scattered by the connecting bridge toward the center of the annular through slit Through the seam. The chord length of the bridge accounts for 2% -10% of the length of the annular through slit, and the angle between the radial aid opening and the center line of the annular through slit through the midpoint of the bridge is 10 to 20. The advantage is that the discharge area is large, Anti-back pressure capability, simple structure.