Inner ring fire cover

An inner ring fire cover comprises a circular ring body part, a combustion cavity arranged on the circular ring body part and provided with a lower opening, and combustion holes formed in the outer ring wall of the combustion cavity, and further comprises a heat insulation cover, the heat insulation cover is provided with an upper opening and a lower opening, and a flow guide heat dissipation device is arranged on the heat insulation cover; the lower end of the heat shield is fixed to the top of the annular body part. The heat shield prevents flames from heating the head of the telescopic temperature sensor, the temperature of the head is reduced through the flow guide heat dissipation device, and the precision is improved. 一种内环火盖，包括圆环形体部、设在圆环形体部上的下开口的燃烧腔及设在燃烧腔外环壁上的燃烧孔，还包括隔热罩，隔热罩具有上开口和下开口，隔热罩上设有导流散热装置；隔热罩的下端与圆环形体部的顶部固定。隔热罩防止火焰加热伸缩式温度传感器的头部，导流散热装置的设置降低了头部的温度，提高了精度。