A processing technology of check valve body

Abstract

The invention discloses a check valve body machining process which comprises the following operating steps: (1) machining the forged blanks of two flanges; (2) machining a cylinder through cold working; (3) welding the two flanges and the cylinder; (4) machining two connecting rod base holes and one oiling base hole on the cylinder through gantry boring; (5) correspondingly welding connecting rodbases in the connecting rod base holes of the cylinder and welding an oiling base in the oiling base hole of the cylinder; (6) eliminating the inner stress of a check valve body and carrying out grinding; (7) carrying out finish turning on the two flanges through a vertical lathe and comprehensively correcting the two flanges subjected to finish turning; (8) correcting sealing surfaces through a gantry; (9) setting a waterline; (10) carrying out workpiece arrangement and burr removal; and (11) carrying out inspection and packaging. The check valve body machining process disclosed by the invention has the beneficial effects that by adoption of the technological procedures of cold working and welding, the defects such as air holes and sand holes which are possibly caused in the casting process can be avoided; the strength and the impermeability of the check valve body can be improved; as well as the safe and reliable work of the check valve body can be guaranteed.

Description

Technical field [0001] The invention relates to a processing technology of a check valve body. Background technique [0002] Check valve is a kind of automatic valve, its main function is to prevent the back flow of the medium, prevent the pump and drive motor from reversing, and the release of the container medium. The function of this type of valve is to only allow the medium to flow in one direction and prevent the flow in the opposite direction. [0003] However, the existing check valves are large in size, with a diameter of more than one meter. The valve bodies of the check valves are mostly castings. The molding process of the valve body is complicated, the cost is high, and the casting itself is prone to holes, cracks, and components. And defects such as unqualified organization and performance, resulting in poor airtightness of the valve body, making the check valve unable to work safely and reliably. Therefore, it is necessary to optimize and improve the processing tech...

AI Technical Summary

Problems solved by technology

[0003] However, the size of the existing check valves is relatively large, with a diameter of more than one meter; the valve body of the check valve is mostly a casting, and the molding process of the valve body is cumbersome, the cost is high, and the casting itself is prone to holes, cracks, and components. And defects such as unqualified organization and performance, resulting in poor airtightness of the valve body, resulting in the check valve not working safely and reliably