Parallel double-supporting plate gate valve

Abstract

The invention discloses a parallel double-supporting plate gate valve which comprises a valve body (1), a pair of valve plates (4), a valve rod (6) and a pair of supporting plates (8), wherein a wedge pressure block (5) is arranged between the pair of valve plates, and the pair of valve plates are installed at the two sides of the wedge pressure block; the valve rod is connected with the wedge pressure block; the supporting plates (8) are positioned between the valve plates and the wedge pressure block; the parallel double-supporting plate gate valve is characterized in that the supporting plates are provided with wings (12); the wedge pressure block is provided with a limit block (18) which is provided with sliding grooves (17) matched with the wings; the two sides of the wedge pressure block are provided with bosses (15); the supporting plates have square (10) structures; the bosses are matched with the square structures of the supporting plates; and the supporting plates with the square structures are provided with springs (13) which are contacted with the lower parts of the bosses. No matter being installed and used along any direction, the gate valve can freely run, and the action way reduces the friction between the valve plates and a valve seat, so that a sealing surface is prevented from being scratched; furthermore, under the action of a flowing medium, the valve plates can naturally rotate, so that the sealing surface of the valve plates can be automatically cleaned, and the service life of the valve can be prolonged.

Description

technical field [0001] The invention relates to a valve, in particular to a valve with double valve plates. Background technique [0002] At present, there are many structures of valves, especially the valves used in petroleum, natural gas and chemical industry have high requirements on their sealing performance. With the rapid development of information technology and continuous improvement of industrial level, new requirements such as energy saving, environmental protection and intelligence have been put forward for the development of valve technology. In recent years, my country's oil and natural gas long-distance pipelines have developed rapidly, so the demand for valves has increased. The gate valve is one of the most common valves for main lines, branch lines and the first and last stations. It can be applied to various working conditions with small flow resistance and does not limit the flow direction of the medium. The traditional gate valves currently produced in ...

AI Technical Summary

Problems solved by technology

However, this kind of gate valve can only be installed in the vertical direction, and its support plate can fall by its own weight. When the gate valve is installed horizontally, the support plate cannot move on the wedge pressure block, so it cannot be opened and closed.

Moreover, since the support plate has no guiding function, it is easy to break away from the wedge block, and it is also easy to cause failure.

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