Improved rotary four-way fluid reversing valve

Abstract

The invention relates to an improved rotary four-way fluid reversing valve, which comprises a valve body, a valve core and a driving device. The driving device is connected with a shaft on the valve core through a coupling I and a coupling II and drives the valve core to rotate. The improved rotary four-way fluid reversing valve is characterized in that the valve core is a cylinder with an I-shaped cross section. U-shaped grooves for installing sealing rings are arranged on the upper and the lower surfaces of the cylinder. When the valve core is installed in the valve body, the inner wall of the valve body squeezes the sealing rings to completely seal two parts of a hollow cavity of the valve body divided by the valve core. The improved rotary four-way fluid reversing valve provided by the invention is good in sealing performance, the conveying distance of a sample box is greatly prolonged and the conveying speed of the sample box is improved, and the improved rotary four-way fluid reversing valve is good in stability, simple in structure and simple to manufacture.

Description

technical field [0001] The invention relates to the field of pneumatic pipeline transportation, relates to a fluid reversing device, in particular to an improved rotary four-way fluid reversing valve with high sealing and high reliability. Background technique [0002] At present, the rotary four-way fluid reversing valve used in the pneumatic pipeline transportation system has a valve core structure such as Figure 4 As shown, the valve body is a cylinder with a through hole along the axis. The reversing valve with this structure has poor sealing performance between the valve core and the valve body, and the four cavities leak each other, resulting in energy loss. The waste of energy causes the pressure in the pipeline to drop. When the compressed air pushes the sample box forward, the speed and distance of the sample box are greatly reduced, which cannot meet the requirements of long-distance and fast transportation. In addition, the disc-shaped cam contour curved surface ...

AI Technical Summary

Problems solved by technology

[0002] At present, the rotary four-way fluid reversing valve used in the pneumatic pipeline transportation system has a valve core structure such as Figure 4 As shown, the valve body is a cylinder with a through hole along the axis. The reversing valve with this structure has poor sealing performance between the valve core and the valve body, and the four cavities leak each other, resulting in energy loss. Energy waste leads to a drop in pressure in the pipeline. When the compressed air pushes the sample box forward, the speed and distance of the sample box are greatly reduced, which cannot meet the requirements of long-distance and fast transportation.

In addition, the disc-shaped cam profile curved surface on the coupling of the existing rotary four-way fluid reversing valve is unstable and difficult to manufacture

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