| 摘要 |
PURPOSE:To positively prevent a false operation of a distribution valve by providing a back pressure valve that sets the back pressure of main pipes whose operation is suspended, and communicating the main pipe that was the delivery line at the time of stopping the oil supply to a tank through the back pressure valve. CONSTITUTION:In a dual main pipe type centralized lubrication device, the secondary side is connected to a tank line 5, and a back pressure valve 14 is provided that sets the back pressure of the main pipes 1, 2 whose operation is suspended. Further, a switch valve device 6 is provided with a means that opens one of the main pipes 1, 2, which was the delivery line at the time of stopping the oil supply when the lubrication device terminates the oil supply, to a tank T through the back pressure valve 14. Therefore, even if the lubrication oil expands its volume in the main pipes 1, 2 due to the rise in temperature while the lubrication device is being stopped, an inadvertent operation of a distribution valve 3 to allow an oil supply can be prevented. |
