Inorganic-machining vacuum evanescent mode cast telescopic gate valve

Abstract

The invention relates to an inorganic-machining vacuum evanescent mode cast telescopic gate valve. A valve cover is fixedly installed at the upper end of a valve body in a sealed mode, a wedge disc is installed in the middle of the valve body in a guiding mode, a valve rod is fixedly installed at the upper end of the middle of the wedge disc and extends upwards out of the valve cover, a lock nut is installed coaxially in the middle of the valve rod in an engaged mode and coaxially embedded into the upper end of the valve cover, and a middle connection nut and a pressing nut are sequentially installed on the part, at the upper end of the lock nut, of the valve rod in a sleeving mode and fixedly installed on the valve cover in a locked mode. Telescopic joints are installed at the two ends of a flowing channel of the valve body respectively, one end of the inner side of each telescopic joint penetrates into the valve body in a coaxial mode, the telescopic joints are sleeved with pressing ring flanges connected with the valve body in a sealed mode, and pressing ring seal gaskets are pressed between the parts, on the inner sides of the pressing ring flanges, of the valve body and the telescopic joints in a sleeving mode. The valve cover can be formed in a one-off cast mode, flange connection is not needed at the valve rod, the requirement for raw materials is lowered, the manufacturing technology is simple, manufacturing technology time is effectively shortened, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the field of valves, in particular to an inorganic processing vacuum lost foam casting telescopic gate valve. Background technique [0002] At present, valve products such as gate valves and globe valves on the market are usually manufactured by sand casting, wax casting, resin sand casting, and coated sand casting. Many professional and technical personnel are needed, and the investment takes up a lot of funds. At present, the casting of the main parts of the gate valve is basically completed by using the torch furnace, which causes pollution to the land, air and water. For many years, the valve manufacturing has not jumped out of these high-energy-consuming casting methods. [0003] Moreover, in the existing process, the connection between the bonnet and the valve stem needs to be machined, and the valve stem can be positioned and locked in conjunction with the flange connection. The process is relatively complicated, the re...

AI Technical Summary

Problems solved by technology

[0008] Comparative analysis shows that there is a big difference between the above disclosed technology and the technical solution of this patent application, and the achieved effects are also different.

Images