| 摘要 |
Disclosed is a hand-operated switch of a foot-operated pneumatic valve. A cylindrical opening (13) is provided on a valve cover (4), the opening (13) is in communication with the outside, a switch column (14) is provided at the opening (13), the switch column (14) is slidably connected to the opening (13), the middle part of the switch column (14) is provided with a seal ring (15), a switch collar (16) is provided above the switch column (14), the middle part of the switch column (14) is provided with an air hole (17), and the air hole (17) enable a cavity in a valve body (1) to communicate with the outside. By using a hand-operated mechanical switch, when an actuating element is damaged, the valve can directly communicate with a water path by pressing the switch collar so that a water flow is not foot-controlled by the pneumatic valve. The device achieves the technical effects of using the device only as a hand-operated switch when the valve is damaged and there is a need to perform an emergency treatment or in the case that the foot operation mode is inconvenient to be used, or alternatively using the device in two switch modes at will. |
