One-way control valve and its manufacturing method

Abstract

The invention belongs to the technical field of gating system control, and particularly relates to a one-way control valve and a production method thereof. The one-way control valve comprises a valvebody (1) and a joint (2) which are fixedly connected by welding, an inlet connecting pipe (4) fixedly welded with the valve body (1), an outlet connecting pipe (5) fixedly welded with the joint (2), avalve core seat part (3) arranged in an inner cavity of the valve body (1) and a valve core part (6) abutting the valve core seat part (3) through an elastic part (7), and the valve body (1), the joint (2) and the outlet connecting pipe (5) are fixedly welded in one time by adopting a high-frequency welding method. The one-way control valve and the production method can solve the problem of the hidden danger of poor welding quality caused by the influence of secondary welding on a welding area, a pickling process required after flame brazing is eliminated, and the reliability of the product is improved.

Description

technical field [0001] The invention belongs to the technical field of flow path system control, and in particular relates to a one-way control valve and a manufacturing method thereof. Background technique [0002] It is more common to use one-way control valves in flow path control systems. A single-way control valve structure in the prior art is as follows: figure 1 shown. The one-way control valve includes a cylindrical valve body 1' and a joint 2'. The inlet connecting pipe 4' is welded on one side of the valve body 1'; the outlet connecting pipe 5' is welded on one side of the joint 2'. The valve core seat part 3' is fixed in the inner cavity of the valve body 1', the valve core part 6' is sleeved on the valve core seat part 3' with a piston structure, and the joint 2' extends into the valve body 1' and is welded and fixed . [0003] In the structure of the one-way control valve in the prior art, since the necessary parts are installed inside the valve body, the in...

AI Technical Summary

Problems solved by technology

[0004] The defect of this product structure is that: when the first assembly and the second assembly are welded, the area previously welded for the first time (between the outlet joint 5' and the joint 2') will be affected by secondary heat, and there is a welding hazard , welding quality is difficult to guarantee

Moreover, the first assembly and the second assembly need to undergo pickling surface treatment to remove welding oxides before the second welding, so the process is lengthy and complicated, and the product reliability is reduced

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