| 摘要 |
PURPOSE:To test the proof pressure of an objective body and oil leakage and to also perform cleaning with high precision by providing an air supply means which supplies specific-pressure air in the middle of a flow passage which couples a hydraulic pump with a high-pressure tank. CONSTITUTION:Hydraulic oil (a) discharged from the pump 2 is sent to and stored in the high-pressure tank through a position selector valve 4 and a valve 30 is closed; when a pressure gauge 8 indicates specific high pressure for a pressure test, the selector valve 4 is switched to a right block to check whether there is a pressure drop or not within a specific time, taking a pressure test. Then, an operation member 13 is moved back as shown by an arrow R and then a valve body 12 slides in the same direction with the pressure of the hydraulic oil in the body W to be tested; and the hydraulic oil (a) flows as shown by an arrow A to the 2nd tank 14 and the hydraulic oil (a) in the 2nd tank 14 is filtered through a filter 25, filters 16 and 16, and filter paper 17 to flow to the 1st tank 1. Thus, the hydraulic oil (a) flows in the body W to be tested at a high speed to clean the body W. |
