Gate valve with two flat plates

Abstract

The invention relates to a valve, in particular to a gate valve with two flat plates. The invention provides the following technical scheme: the gate valve with the two flat plates comprises a valve body, a valve plate, a hand wheel, and a valve rod connected with the hand wheel and the valve plate, wherein the valve body is provided with a medium inlet passage, a medium outflow passage and a connecting passage; the parts, positioned on two sides of the medium inlet passage and the medium outflow passage, of the connecting passage are provided with valve seats; the valve plate is arranged in the connecting passage, is sealed with the valve seats, and consists of two valve blocks sleeved with each other; the outer sides of the two valve blocks are provided with an alloy cutting hard sealing ring sealed with the valve seats respectively; the valve seats are provided with adaptive alloy sealing rings matched with the alloy cutting hard sealing rings on the two valve blocks; an expansion pressing part for matching the alloy cutting hard sealing ring on the two valve blocks with the alloy sealing rings on the valve seats is arranged between the two valve blocks; and the valve rod is connected with the two valve blocks through a hanging piece. By adopting the technical scheme, the gate valve with the two flat plates can prevent particle impurities from influencing the sealing and has good sealability.

Description

technical field [0001] The invention relates to a valve, in particular to a double-plate gate valve. Background technique [0002] Gate valves are mainly used in the treatment of media such as sand, fiber materials, and sludge. At present, the gate valves appearing on the market and data are mainly composed of valve body, valve seat, valve plate, handwheel driving the valve plate and valve stem connecting the handwheel and valve plate. The valve body is provided with a medium inlet channel and a medium outflow channel. The medium inlet channel and the medium outflow channel are connected through a connecting channel. Usually, the channel of the valve body is provided with an oblique groove for the valve plate to be inserted. The valve plate is driven by the handle, and the valve stem drives the valve plate along the valve body. The oblique hook groove in the connecting passage slides back and forth, thereby constituting the opening and closing of the valve body. [0003] A...

AI Technical Summary

Problems solved by technology

[0003] After the above gate valve has been used for a long time, some impurities will accumulate in the oblique groove sealed with the valve plate in the connecting passage of the valve body, resulting in that the lower part of the valve plate cannot be fitted with the bottom end surface of the oblique groove of the connecting passage of the valve body. , affecting the tightness of the valve body

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