Four-position seven-way reversing valve

Abstract

The invention relates to a four-position seven-way reversing valve. A middle valve body is fixed on the upper surface of a lower valve body in a sealing mode; a reversing valve core and a pressure spring are arranged inside the middle valve body; the upper end portion of the pressure spring is abut against the top of the inner wall of the middle valve body; the lower end portion of the pressure spring is abut against the upper surface of the reversing valve core; the lower surface of the reversing valve core and the upper surface of the lower valve body are compressed; an upper valve body is installed on the upper surface of the middle valve body in a rotating mode; a rotating shaft is fixed on the upper valve body; a rotating shaft installation hole is formed in the middle valve body; the rotating shaft is rotationally installed inside the rotating shaft installation hole in a sealing mode; the lower end portion of the rotating shaft and the reversing valve core are fixed. According to the four-position seven-way reversing valve, a four-position seven-way control loop is achieved, simultaneously controlled continuous movement of a multi-gas-circuit of an automatic production line is achieved, application area of a pneumatic system is expanded to a large extent, diversity, practicability and quickness of a pneumatically controlled loop are improved, and loop connecting and controlling elements are saved.

Description

technical field

[0001] The invention relates to a reversing valve body, in particular to a four-position, seven-way reversing valve. Background technique

[0002] In the pneumatic system, the manual rotary valve is a widely used component in the pneumatic circuit as a manual control reversing element. It drives the manual shaft through the handle to reversing the reversing valve core. There are two arc-shaped flow channels on the reversing valve core. After turning the direction, the four air ports of the corresponding lower valve body realize the position conversion. There is a through hole on the reversing valve core to conduct the airflow to act on the top of the valve core, and press the reversing valve core to form a sealing surface, so as to realize the three positions of the manual rotary valve. At present, the same structural design is adopted at home and abroad, but this structure has a limitation, it can only rotate and control the reversing within the specified de...

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