Knowledge that hydraulic jack users must know

Before use, check if the pipeline hydraulic jack machine circuit is properly connected, and if there is any leakage or cable scratches; It is prohibited to expand the hole without water. It is necessary to provide water first before drilling, and to stop drilling before parking; When expanding the hole, first add 42 drill bits to drill through the pipeline, remove the drill bit when pulling back the rod, and install an reamer to drill back and expand the hole; When drilling back and expanding the hole, the speed of drilling back and expanding the hole should be adjusted based on the soil condition and the diameter of the hole; For the convenience of construction, the small pipeline jacking machine is equipped with forward and reverse switches to solve the problem of slow manual operation when changing poles; Thoroughly investigate the changes in the operation during the replacement of the drill pipe, and acknowledge that there is no looseness, slipping, or falling of the drill pipe; Usually, when dragging and expanding the hole, a larger amount of water is required compared to normal straight drilling. Properly adjusting the flow rate of the high-pressure water pump can reduce the amount of sludge in the pipeline; When drilling, the water flow rate is usually 10-20L/min, and the pressure is 0.1-2MPa. After the expansion is completed, if the pipeline sludge is not ideal to be removed, the screw rod of a hydraulic jack can be used for secondary excavation.