Seal structure of diamond valve

Abstract

The invention relates to a seal structure of a diamond valve, comprising a left valve body, a right valve body, a disc. The said disc is clamped between the left valve body and the right valve body, and the left valve body is fixedly connected with the right valve body by a bolt; a valve seat inert is embedded between the disc and the valve body, a seal ring is embedded between the valve seat insert and the disc, and an O-shaped seal ring is embedded between the valve seat insert and the valve body; one end of the said cylindrically coiled compression spring is against the valve body, and the other end is against the valve seat insert. The seal ring is pressed tightly on the disc, thus good air-tightness of the diamond valve is guaranteed. According to the invention, polytetrafluoroethylene is adopted as the material of the seal ring, so that the seal devise has good abrasion resistance, and the service life of the diamond valve is lengthened. The compression spring is adopted which the seal ring is stuck tightly to the disc, and the disadvantage of the insufficient air-tightness of polytetrafluoroethylene is overcome; the o-shaped seal ring is adopted between the valve seat insert and the disc, so that such double seals further guarantee that the diamond valve has superior air-tightness.

Description

technical field [0001] The invention relates to a sealing structure of a valve, in particular to an improved sealing structure applied to a rhombic valve. Background technique [0002] The diamond-shaped electric control valve is generally used to adjust the air volume in the air pipeline of the biological oxidation tank of the sewage treatment process. The shape of the flow path of the diamond valve is diamond, and the connection form with the pipeline is flange connection. It is mainly composed of valve body, valve plate, bracket, driving device, sealing ring and positioning pin. The diamond valve controls the area of ​​the flow channel by moving the valve plate up and down, thereby adjusting the air flow in the pipeline. ZL patent number is 201010513587.8, and the invention name is sewage treatment aeration flow regulating valve. In the sealing structure of the valve plate and the valve body, the seal between the valve plate and the valve body is generally a rubber O-r...

AI Technical Summary

Problems solved by technology

However, because the valve plate needs to be opened and closed frequently, the sealing ring and the valve plate are always in a state of friction, and the rubber material has poor wear resistance, so there is a disadvantage of poor durability.

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