The sealing air bag is put into the pipe mouth to be blocked, the length is the length of the sealing air bag pipe, and then the compressed air is charged to the specified pressure through the air intake valve, and the construction can be carried out. After completion of construction, open the air valve to release air and take out the sealing bag. The steps are as follows:
(1) Construction preparation: First combine the accessories of the round pipe stopper inflation device to check the leakage of tools. Use the air pump to fill the air bag, the air pressure shall not exceed 0.15MPa, check whether the air bag leaks.
(2) Open the pipe mouth, place the airbag slowly into the required position from this mouth, and then inflate it into the airbag, and inflate it to the appropriate pressure.
(3) In order to prevent the air bag and the hose from coming off, the air bag and the hose interface should be tightened with iron plates and screws or tied by other means.
(4) When the air pump inflates the air bag, it should be slowly inflated to keep the pressure inside the air bag evenly blocked by the pipeline, and observe whether the pressure gauge rises, such as the rapid rise of the pressure gauge indicates that the inflation is too fast. At this time, the inflation speed should be slowed down and the air check valve should be slightly tightened to reduce the intake speed, otherwise the speed is too fast and the pressure is quickly exceeded. Because the power of the air pump used varies from brand to brand quality, there is a certain difference in the speed of inflation, so it is necessary to calculate the time required for the air bag to fill up when inflating on the ground.
(5) In the engineering operation, we should always pay attention to the pressure value of the air bag, if the pressure value of the air bag is falling slowly, it is unnecessary to stop the operation, continue to use the air pump to replenish the air bag to the standard air pressure, and then check the air bag or accessories where the air leakage after the completion of the operation.