Back auxiliary sealing structure after failure of valve packing
A back auxiliary sealing structure after valve packing failure comprises a valve cover, an open hole is formed in the axis position of the valve cover, a valve rod penetrating through the valve cover is arranged, the upper end of the valve cover is matched with the valve rod to form a packing cavity...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | A back auxiliary sealing structure after valve packing failure comprises a valve cover, an open hole is formed in the axis position of the valve cover, a valve rod penetrating through the valve cover is arranged, the upper end of the valve cover is matched with the valve rod to form a packing cavity, the packing cavity is filled with packing, and the packing is pressed through a pressing device to achieve sealing between the valve cover and the valve rod. The bottom end of the packing cavity is provided with a self-sealing packing pad, the self-sealing packing pad is provided with a plurality of grooves, when valve packing loses efficacy, the self-sealing packing pad is jacked to the packing pressing ring, the grooves of the self-sealing packing pad guide medium flow to generate the hedging air resistance sealing phenomenon with media in the leakage direction, the leakage amount is effectively reduced, and the sealing effect is improved. Under the double guarantee of the packing seal and the self-sealing pack |
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