Pneumatic two-position four-way reversing valve

Abstract

The invention relates to a pneumatic two-position four-way reversing valve. A traditional built-in two-position four-way reversing valve of a pneumatic motor can stop at a dead-point position in the operating process, i.e. an air-inlet cavity of an air-distributing chamber is directly communicated with an air-discharging opening through a slide block to cause a spraying machine to stop working, and a dead-point phenomenon is strictly prohibited to appear on the spraying machine on an automatic spraying flow line. In the invention, aiming at the deficiency, on the basis of a traditional two-position four-way valve, permanent magnets are inlaid in a reversing piston, an upper end-cover hole and a lower end-cover hole, and the dead-point difficult problem of the two-position four-way valve appearing in the reversing process is solved through the change of magnet forces and friction forces.

Description

technical field

[0001] The invention relates to a reciprocating air motor for a pneumatic airless spraying machine, a gluing machine or other purposes, in particular to a pneumatic two-position four-way reversing valve built into the air motor. Background technique

[0002] The existing pneumatic airless spraying machine or pneumatic gluing machine is composed of an air motor and a paint hydraulic pump, and the air motor is the core part of the pneumatic airless spraying machine, which provides reliable power for the pneumatic airless spraying machine . The air motor of the airless spraying machine continuously enters the compressed air from the upper or lower chamber of the cylinder through the air distribution reversing mechanism, and pushes the piston to move up or down, while the compressed air in the lower or upper chamber of the cylinder must be instantaneous Exhaust to atmosphere through the exhaust port. The two-position four-way reversing valve built into the ex...

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