Valve core spring life test tool

Abstract

The invention discloses a valve core spring life test tool. The valve core spring life test tool comprises a valve, a base, a first pressing sheet, a second pressing sheet, a supporting frame, a cam and a corrugated pipe; the valve comprises a guide column, a valve end and a valve rod; the lower portion of the valve rod is inserted into the guide column and fixedly connected with the guide column;a mounting groove is formed in the base; a guide hole penetrating through the base is formed in the mounting groove; the guide column is arranged in the guide hole; the first pressing sheet and the second pressing sheet are arranged on the mounting groove; one end of a corrugated pipe is fixed to the mounting groove in a sealed mode; through holes are formed in the centers of the first pressing sheet and the second pressing sheet; the valve rod penetrates through the through holes to be inserted into the guide column; a valve element spring sleeves the upper portion of the valve rod; the topend of the valve element spring abuts against a valve end, and the bottom end of the valve element spring abuts against the second pressing sheet; the supporting frame is used for supporting the valveand the base; the upper surface and the lower surface of a sliding block of the supporting frame make contact with the cam and the valve end respectively; and the other end of the corrugated pipe isfixed to the valve end in a sealed mode.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a tool for testing the life of a valve core spring. Background technique [0002] A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials are deformed under the action of external force, and return to their original shape after the external force is removed, also known as "spring". Generally made of spring steel. The main failure modes are: permanent deformation and fracture. [0003] There are many manufacturers producing springs in the market today, and their service life varies. The service life given by the manufacturer is often inferred. Although some have been tested experimentally, the test conditions are far from the actual conditions. The service life varies greatly. For valves that contain springs, the life of the spring also determines the life of the valve. [0004] At present, the life test of the valve core spring does not acc...

AI Technical Summary

Problems solved by technology

[0004] At present, the life test of the valve core spring does not accurately simulate its working conditions (such as positive pressure and negative pressure in the pipe), and there are deficiencies such as the inability to give accurate life values.

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