A stress-free valve body structure

Abstract

The invention discloses a stress-free valve structure, which comprises a valve seat, a valve core element and a spring, wherein a valve opening penetrating through the upper plane and the lower plane is formed in the valve seat, the valve opening is in a cylindrical shape, in addition, the caliber of the valve opening is constant, the valve core element is clamped in the valve opening, in addition, the upper end of the valve corer element penetrates out of the valve opening, the spring is connected with the bottom end of the valve core element, the upper end of the valve core element is provided with a water inlet, the water inlet penetrates through the lower bottom surface of the valve core element, the valve core element comprises an upper valve core and a lower valve core, the upper valve core adapts to the valve opening structure, and seals the upper end of the valve opening, the lower valve core is clamped at an opening part formed in the lower end of the valve opening, and seals the opening formed in the lower end of the valve opening, the upper valve core and the lower valve core are connected through a connecting core, and the middle part of the valve seat is provided with a water outlet. The valve opening is of a cylindrical structure, and in addition, the whole caliber is consistent, so that the contact area between the upper valve core and liquid as well as the contact area between the lower valve core and liquid in the valve opening are consistent, and the upward pushing force and the downward pressure are mutually counteracted. The stress-free valve structure has the advantages that the stress-free effect in the work process is achieved, and the stability of the valve core position is ensured.

Description

technical field [0001] The invention relates to a hydraulic fitting, in particular to a stress-free valve body structure. Background technique [0002] A valve is a device that uses a movable part to open, close, or partially block an opening or passage, so that fluid can flow out, be blocked, or be regulated. The hydraulic valve in the prior art uses a steel ball or a metal cone slide valve as the valve core to contact and compress the orifice of the metal valve seat under the action of a spring and fluid pressure. When working, the fluid from the liquid channel in front of the valve body pushes the valve core away under the action of pressure and flows out of the valve body. When the pressure is lost or the directional pressure is applied, the valve core resets and the valve body closes. In order to ensure the flow area, the flow channel at the back of the valve body is larger, and the pressure exerted by the front water flow on the valve core is also subjected to the pr...

AI Technical Summary

Problems solved by technology

Because the area of ​​the front and rear flow channels of the valve core is different, the pressure exerted by the liquid on the valve core is also different. At this time, it is difficult to control the stability of the valve core position only by the pressure of the spring, which will affect the flow regulation of the fluid.

In the case of a large gap between the front and rear flow channels of the valve body, it may even affect the opening and closing of the valve body

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