An Electric Shuttle Valve with Cam Mechanism

Abstract

The invention relates to an electric shuttle valve of a cam mechanism. A three-way valve body (1) is of a two-position two-way structure, and three holes distributed in an inverted T shape are formed in the three-way valve body (1) and form an inlet and outlets. Flange end covers (5) are fixedly connected to the outlets, and a sealing gland (10) is fixedly connected to the inlet. Valve cores (8) are positioned at the connecting positions of the flange end covers (5) and the three-way valve body (1), and guide rods (7) penetrate through the valve cores (8) and are integrally and fixedly connected with the valve cores (8). A valve rod (18) penetrates through the sealing gland (10), enters into the three-way valve body (1) and is assembled in the three-way valve body (1) through a bearing. An eccentric circular cam is arranged in the middle of the valve rod (18). One end, positioned in the three-way valve body (1), of each guide rod (7) is fixedly connected with a connecting frame (25) through a fixed ring (22), so that the two guide rods (7) is butted against the cam and form an integral link structure. The cam is driven to rotate through the rotation of the valve rod (18), so that the valve cores (8) on one side are far away from the flange end covers (5), and the inlet is communicated with the outlets on one side.

Description

technical field [0001] The invention relates to an electric valve, which can be used for adsorption and analysis of a regenerative CO2 removal system and a regenerative trace harmful gas removal system of an aerospace environmental control and life protection system. Background technique [0002] The aerospace environmental control and life support system provides the air needed for life support for the personnel on the spacecraft, and at the same time purifies and absorbs the exhaust gas generated by astronauts in space and the trace amount of harmful gas generated by internal devices. The system includes various physical and chemical reaction devices and various manual and electric valves, which have been working throughout the entire life cycle of the spacecraft, and each work process is completed by switching the corresponding valves to complete the switching of the gas system. [0003] At present, ball valves are mostly used in manual selection valves, which have simple...

AI Technical Summary

Problems solved by technology

At the same time, after long-term operation, the gasket will be worn, the sealing performance will be reduced, and excess will be generated at the same time, so it cannot meet the cleanliness requirements of the aerospace gas system

[0004] In the environmental control and life protection system, it is necessary to have an electric valve whose life cycle covers various mechanical environments such as ground, launch, in-orbit, and return stages. Valves that can adapt to multiple indicators such as space environment and cleanliness, ordinary manual selection valves can no longer meet this specific requirement

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