Lower seal valve

Abstract

The invention discloses a lower seal valve which comprises a valve seat, a valve cap and rubber seal rings, wherein the rubber seal rings are arranged in the valve cap; the rubber seal rings extend out of the valve cap, and are contacted with the valve seat; bulge loops are arranged on the lower surface of the valve seat, and are contacted with the rubber seal rings; an annular groove is formed in each bulge loop; and water vapor passes through the annular grooves. According to the lower seal valve provided by the invention, the bulge loops are arranged on the lower surface of the valve seat, and are contacted with the rubber seal rings, the annular groove is formed in each bulge loop, and the water vapor passes through the annular grooves, so that condensed steam and furnace dust are less susceptible to scaling on the contact surface of the valve seat and the rubber seal rings, thus, the rubber seal rings and the valve seat can be fully contacted in good condition, and the sealing performance of the lower seal valve can be guaranteed.

Description

technical field [0001] The invention relates to a lower sealing valve, in particular to a lower sealing valve for a bellless blast furnace top, which belongs to the technical field of blast furnace smelting. Background technique [0002] The bellless blast furnace roof can distribute the blast furnace in the form of ring, spiral, fan and fixed point, etc., and can flexibly distribute the charge to any area and point of the throat section according to the change of furnace conditions in the blast furnace production, so that It satisfies the needs of adjusting the upper part of the blast furnace to the greatest extent. The lower sealing valve of the bellless blast furnace roof is an important component of the bellless blast furnace roof equipment. It is used to seal the material tank and ensure the pressure operation of the blast furnace. The quality of its sealing performance directly affects the production capacity of the blast furnace. The existing lower sealing valve stru...

AI Technical Summary

Problems solved by technology

The rubber sealing ring has been in the working condition of high temperature, high pressure and high dust for a long time. When the charge is loaded into the furnace, although the charge is not in direct contact with the rubber sealing ring, the high-concentration dust will fill all the space of the lower sealing valve when the material is unloaded. , the furnace material contains condensed water vapor, and when it meets the valve seat, it will stick to the surface of the valve seat together with the furnace dust to form dirt. As time goes by, the thickness of the dirt will also increase, and it will stick very firmly. On the sealing surface of the valve seat, there is an uneven surface. When the rubber sealing ring contacts the sealing surface of the valve seat, there will be a gap between them, which affects the sealing performance of the lower sealing valve.

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