Vertically installed gate valve with double pin teeth for electric power industry and cement industry

Abstract

The invention discloses a vertically installed gate valve with double pin teeth for the electric power industry and cement industry, which comprises a valve body, an inner guide component, a valve plate, an upper stand, an outer sealing component, an outer guide component, pin teeth, a chain wheel, a pin tooth guide component, a transmission shaft and an electric speed reducer, wherein the outer sealing component is installed outside the valve body; the inner guide component is installed in the valve body; the valve plate is inserted into the valve body; the upper stand is installed above the valve body; the outer guide component, the two pin teeth and the pin tooth guide component are installed in the upper stand; the upper end of each pin tooth is connected with the valve plate through a pin shaft; the lower end of each pin tooth is connected with the chain wheel; the chain wheel is connected with the transmission shaft; and the transmission shaft is connected with the electric speed reducer. The invention reserves the advantages of smoothness and reliability of gear and rack transmission, and simultaneously has convenient processing and low cost.

Description

technical field [0001] The invention relates to a gate valve, in particular to a vertical installation double-pin tooth gate valve for electric power and cement industries. Background technique [0002] The working environment temperature of gate valve for electric power and cement industry is below 500 ℃, the requirement of tight outer sealing is high, the diameter is large (generally above 1600mm), and the stroke is long (generally above 1800mm). Stable, easy to lose stability and cause jamming, and can only be closed by the dead weight of the valve plate to move downward, and the closing force is insufficient; the use of gear-rack transmission can meet the working requirements, but the precision of gears and racks is very high. And the long rack is not easy to process, and the cost is too high. At present, there is a lack of such valves with high cost performance and reliable transmission in China. SUMMARY OF THE INVENTION [0003] The purpose of the present invention...

AI Technical Summary

Problems solved by technology

[0002] The working environment temperature of gate valves used in electric power and cement industries is below 500°C, the requirements for tight outer sealing are high, the diameter is large (generally above 1600mm), and the stroke is long (generally above 1800mm). Stable, easy to lose stability and cause jamming, and when closing, the valve plate can only be closed by the downward movement of the valve plate, and the closing force is insufficient; while the gear-rack transmission can meet the working requirements, but the gear and rack have high precision requirements. Moreover, the processing of long racks is not easy and the cost is too high

At present, there is a lack of such valves with high cost performance and reliable transmission in China.

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