Valve core component of pilot valve and stepped direct-acting electromagnetic valve

Abstract

The invention provides a valve core component of a pilot valve, which is arranged in the inner hole of a valve body; the valve body is provided with a main flow valve port; the valve core component of the pilot valve comprises the valve core of the pilot valve and a sealing element; the valve core is provided with a damping hole; and the sealing element is arranged between the valve body and the valve core and is provided with a sealing plane for sealing the main flow valve port. According to another aspect of the invention, the invention also provides a stepped direct-acting electromagnetic valve which comprises the valve core component of the pilot valve. The invention improves the sealing effect of the electromagnetic valve, has low processing requirements, low cost and reasonable structure, improves the installing efficiency, reduces the rejection rate of the electromagnetic valve, improves the quality, and stabilizes the performance.

Description

technical field [0001] The invention relates to the field of solenoid valves, and more specifically, to a valve core assembly of a pilot valve and a step-by-step direct-acting solenoid valve. Background technique [0002] Such as figure 1 As shown, the spool 1 of the pilot valve, as the core component of the step-by-step direct-acting solenoid valve, cooperates with the main flow valve port 21 and the moving iron core 35 components respectively, which directly affects the internal leakage of the valve body 2 and the maximum valve opening pressure difference And other key performance indicators of solenoid valves. Such as image 3 As shown, the spool 1 of the pilot valve mainly includes: a small valve port 11 , a spool guide section 12 , a damping hole 13 , a cylindrical surface 14 , and a sealing cone surface 15 . Such as figure 2 As shown, the valve body 2 mainly includes: a main flow valve port 21 and a valve body guide slide section 25 , wherein the main flow valve p...

AI Technical Summary

Problems solved by technology

[0003] Affected by the current technology and production equipment, when the valve body is finished, the concentricity of the main flow port 21 and the guide slide section 25 of the valve body, the sealing surface of the valve core of the pilot valve, the concentricity and roughness of the guide slide section of the valve core, etc. It is difficult to control. The sealing effect between the valve core 1 and the valve body 2 of the pilot valve is poor, which causes defects such as internal leakage of the solenoid valve and poor valve opening performance, which eventually leads to high scrap rate, poor quality and unstable performance of the solenoid valve.

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