Detailed introduction to water plugging methods
Water plugging application method
1. Preparation: first, stop assembling the fittings for water plugging and air inflation installation, and conduct tool leakage test. Place it in a bucket full of water and press it, inflate it with an air cylinder, and check whether there is air leakage.
2. Open the inspection port of the riser, gradually feed the blocked water upward from this port for about 0.5m, and then inflate it to make sure that there is no water leakage in close contact with the inner wall of the pipe. The operator inflates air in the lower layer and fills water in the upper layer. Pay attention to prevent it from being placed at the valve of the riser pipe fittings for the following reasons:
(1) There are joints on the inner wall of this place, which affects the tightness of water plugging.
(2) In order to avoid contracting to one side, the air pressure cannot be hit. If you continue to inflate, you will be broken through. As for cast iron drainage pipe, it is required to clean the sand, make the inner wall flat, and do not allow burrs, otherwise it will affect the water plugging and sealing, and even puncture. Various specifications must be used in the corresponding pipeline, and cannot be replaced by small ones.
3. Fill water to the floor height at the water filling port (or at the inspection port) of the floor, and then check the water filling pipes and pipe fittings one by one. If leakage points are found, make marks, and stop repairing after drainage; If it is a ring flexible interface, it can be repaired with water tight bolts at the leakage interface. If there is no leakage point in the inspection of the water filling pipeline, the water level can be stabilized, and the water filling time lasts for 15 minutes. If the water filling level does not drop for 5 minutes, it is qualified.
4. Bleed the water blockage, and then slowly pull it out, taking care not to damage it.
5. After the water is taken out, the water should be able to drain away quickly. If the water falls slowly, it should be clarified that there are sundries in the irrigation pipe section, which should be cleared in time.