Check valve casting and its processing technology

Abstract

The application relates to the field of castings, and discloses a check valve casting and its processing technology. Check valve casting, the surface of the check valve casting is processed by a surface treatment agent, and the surface treatment agent includes the following raw materials in parts by weight: 30-40 parts of styrene-maleic anhydride copolymer; 8-10 parts of Cr 3 Si; 4‑6 parts of 1,6‑hexanediol diacrylate; 6‑8 parts of 4‑(benzylthiol)phenol; 1‑2 parts of catalyst; 40‑50 parts of isooctyl polyoxyether ester; The processing technology is: S1. Surface treatment agent preparation; S2. Thermal spraying; S3. Post-processing; This application has the following advantages and effects: using Cr 3 Si enhances the wear resistance of surface treatments, styrene‑maleic anhydride copolymer and Cr 3 Si blending to improve dispersion, and further mixing the products of 1,6-hexanediol diacrylate and 4-(benzylthiol) phenol to obtain a copolymer mixture with a larger molecular weight and a dense structure to improve the non-return The wear resistance of valve castings; the processing technology adopts the method of preheating, thermal spraying and sealing treatment, and the performance of check valve castings is better.

Description

technical field [0001] The application relates to the field of castings, in particular to a check valve casting and its processing technology. Background technique [0002] Check valve castings are parts that can be assembled into check valves through casting. An automatic valve that is mainly used to prevent backflow of media, reverse rotation of pumps and drive motors, and discharge of container media; current check valve castings are usually made of stainless steel. [0003] At present, the patent with the publication number CN105422927A discloses a ball check valve, which includes a valve body and a spherical plugging valve core. One end has an outlet, and the flow channel in the valve body has a spherical plugging spool movable chamber, one end of the spherical plugging spool movable chamber communicates with the outlet, and the other end of the spherical plugging spool movable chamber has a valve port, The valve port communicates with the inlet port. [0004] The ab...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: in the current spherical check valve, the check ball will move relatively large in the passage, and the friction is relatively large, so the casting of the check valve is prone to wear and tear during long-term practical application, affecting use, so there is still room for improvement