Three-way valve structure

Abstract

The invention provides a three-way valve structure which is simple in structure, long in service life, low in noise and good in sealing performance. The valve comprises a valve body; a water inlet path, a first water outlet path, a second water outlet path, a cavity and a sealing frame are arranged in the valve body, the first water outlet path communicates with an upper end opening of the cavity,the second water outlet path communicates with a lower end opening of the cavity, and the water inlet path communicates with a side end opening of the cavity; the sealing frame comprises an upper sealing ring matched with the upper end opening of the cavity and a lower sealing ring matched with the lower end opening of the cavity, the upper sealing ring is connected with the lower sealing ring through a connecting piece, the sealing frame is embedded in the cavity, a stretching assembly is arranged on the valve body, and the stretching assembly comprises a driving shaft. The lower end of thedriving shaft penetrates through the sealing frame and is provided with an upper piston and a lower piston, the upper piston is located above the upper sealing ring and matched with the upper sealingring, and the lower piston is located below the lower sealing ring and matched with the lower sealing ring. The invention can be applied to the technical field of three-way valves.

Description

technical field [0001] The invention relates to the technical field of wall-hung boilers, in particular to a three-way valve structure. Background technique [0002] In general, a three-way valve is constituted by an inlet and an outlet of a valve housing formed in three directions so that the direction of fluid flow through the inlet and outlet is switched according to the movement of the valve body, and the three-way valve is configured to pass through one inlet The incoming fluid is selectively discharged through the other two outlets. [0003] The existing three-way valve structure usually uses a spool with an adapted piston, and then the spool drives the piston to block the water outlet, so as to realize the conversion between different water outlets. The patent application publication number is CN 109424763 A A three-way valve is provided, the three-way valve realizes fluid flow direction control, can regulate fluid flow, has a simple structure, and reduces component ...

AI Technical Summary

Problems solved by technology

However, this patent also has the following disadvantages: when the valve is closed, the movement direction of the piston is consistent with the direction of the water flow, and a negative pressure will be generated at the moment of closing, which will suck the piston suddenly, which will cause the piston to strike and make noise, and at the same time make the The service life of the piston is shortened; the valve body is integrally formed, the error is difficult to grasp, and the assembly is not tight, and internal leakage problems are likely to occur

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