One-way full-sealed hidden rod type knife gate valve with cover

Abstract

The invention discloses a one-way full-sealed hidden rod type knife gate valve with a cover. The gate valve comprises a valve deck, wherein a valve rod is arranged in the valve deck, combined filler is arranged at one end of the valve rod, a first sealing device is arranged on the outer side of the valve rod, a gate plate is arranged on one side of the valve rod, a second sealing device is arranged on the outer side of the gate plate, a lower valve body is arranged on one side of the valve deck, a gate plate is arranged in the lower valve body, a valve body is arranged on one side of the lowervalve body, a first support plate and a second support plate are arranged on two sides of the top of the valve body respectively, a lower valve body is connected to one side of the valve deck throughbolts, a knife gate valve plate is arranged on the inner side of the lower valve body, wear-resistant rubber is arranged on one side of the knife gate valve plate, a valve body mounting hole is formed in the top of the valve body, and the first support plate and the second support plate are connected to two sides of the valve body mounting hole through bolts. The gate valve has the characteristics of wear resistance and good sealing property of the valve rod.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a one-way fully sealed concealed rod knife gate valve with a cover. Background technique [0002] Knife gate valve is also called knife gate valve, knife gate valve, slurry valve and mud valve. Medium, the gate has two sealing surfaces, the two sealing surfaces of the most commonly used mode gate valve form a wedge shape, the wedge angle varies with the valve parameters, usually 5°, the gate of the wedge knife gate valve can be made into a The whole is called a rigid ram; it can also be made into a ram that can produce a small amount of deformation to improve its manufacturability and compensate for the deviation of the sealing surface angle during processing. This kind of ram is called an elastic ram. There is actually no chamber in the valve body, and the gate moves up and down in the side guide groove, and is pressed tightly on the valve seat by the lug at the bottom. [0003...

AI Technical Summary

Problems solved by technology

[0007] According to the above technical solution, one side of the bonnet is bolted to a lower valve body, a knife gate valve plate is provided on the inner side of the lower valve body, and wear-resistant rubber is provided on one side of the knife gate valve plate, and the valve body The top of the valve body is provided with a valve body installation hole, the two sides of the valve body installation hole are connected with the first bracket plate and the second bracket plate by bolts, the valve cover seals the valve stem originally exposed to the outside air, and improves the valve The service life of the rod is connected with the valve body through bolts. The two sides of the knife gate valve plate are equipped with wear-resistant rubber, and the valve plate is in contact with the rubber to prolong the service life of the valve body. At the same time, the wear-resistant rubber adopts a one-time molding process, eliminating the need for The finishing process of the body sealing surface has the effect of increasing efficiency and reducing costs. The valve body installation hole set on the top of the valve body has undergone wafer-type strength finite element analysis, and the structure of the valve body has been optimized. The valve body adopts an integrated structure design. , combining the two parts of the split valve body and the back cover in the existing pneumatic control valve into one, completely solving the technical problem of air leakage between the split valve body and the back cover due to poor sealing; further improving The strength of the pneumatic control valve is improved, and the manufacturing process and assembly process are optimized at the same time, so that the performance of the improved pneumatic control valve is more reliable, the work efficiency is effectively improved, the production cost is reduced, and the working life is also greatly extended. The first The support plate and the second support plate are connected by bolts, which can not only protect the gate plate, but also facilitate assembly, inspection, maintenance and repair

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