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平门防喷盒由组焊而成的盒身和平门两部分用铰链联为一体构成,如附图所示。盒的上部有顶板和胶皮。内部焊有挡浆板,将盒腔分为上、下两部分,除减少泥浆上喷冲力,保护顶板胶皮,防止泥浆大量从上部喷出外,还起加强防喷盒的作用。平门上下有联动推板,起关闭平门或将钻杆推离防喷盒的作用。盒身下部呈锥形,以减小下喷泥浆的污染范围。盒身
Flat door anti-spray box welded by the box body and the peace door two parts with a hinged as one, as shown in the figure. The top of the box with roof and rubber. The interior is welded with baffle plate, the chamber is divided into upper and lower parts, in addition to reducing the impact of the spray on the mud to protect the roof rubber to prevent a large number of mud from the top of the spray, but also play a role in strengthening the anti-spray box. Flat door up and down the linkage push plate, shut down Pingmen or drill pipe from the role of anti-spray box. The lower part of the box body is tapered to reduce the pollution of the sprayed mud. Box body