Three-way check valve

Abstract

The invention discloses a three-way check valve comprising a three-way valve body, a valve seat, and a ball check valve. The three-way check valve is characterized in that the three-way valve body is composed of a left inlet pipe, a hight inlet pipe, and an outlet pipe, and one ends of the left inlet pipe and the right inlet pipe crosswise communicate with each other and then communicate with the outlet pipe to form a locating flange at an inner junction of the left inlet pipe and the right inlet pipe. The ball check valve rolls onto the valve seat of the right inlet pipe or the left inlet pipe through the locating flange when under the action of thrust of a fluid medium in the left inlet pipe or the right inlet pipe, and the valve seat seated under the ball check valve is blocked and sealed by the weight of the ball check valve; thus, the sealing performance is greatly improved. With such a structure, the three-way check valve has the advantages of novel structure, favorable sealing performance, prevention of medium back flow, large flow area, and the like.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a three-way check valve. Background technique [0002] At present, valves, especially check valves, are indispensable components in pipelines. In water conservancy systems, check valves play an irreplaceable role in preventing water from flowing backwards. At the same time, due to the hydraulic characteristics of the pipeline, two pipelines need to enter the same pipeline, but the two pipelines cannot be connected, which requires a three-way check valve with a small water hammer force. [0003] After retrieval, CN203335931 discloses a utility model patent for a ball type three-way check valve, which includes a valve body, a valve disc, a retaining ring and a valve seat, and the valve disc, retaining ring and valve seat are in the valve body, and its The feature is that the valve clack is made of rubber sheathed rolling ball, which rolls left and right in the valve body under the ...

AI Technical Summary

Problems solved by technology

[0003] After retrieval, CN203335931 discloses a utility model patent for a ball type three-way check valve, which includes a valve body, a valve disc, a retaining ring and a valve seat, and the valve disc, retaining ring and valve seat are in the valve body, and its The feature is that the valve clack is made of rubber sheathed rolling ball, which rolls left and right in the valve body under the action of the medium. When the medium enters from one side, the valve clack is sealed with the valve seat on the other side, and the medium flows from the axial pipeline. Outflow, so that the medium on both sides of the pipeline can enter the axial pipeline, and prevent the medium on both sides of the pipeline from flowing backwards. On the other side, if the thrust of the medium is not enough to push the rolling ball to the valve seat on the other side of the valve body, the rolling ball cannot seal the valve seat on the other side. When the water pump stops, this structure cannot Prevent the backflow of the upper fluid medium, therefore, this valve body also loses the function of non-return

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