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Anonymous users2024-01-24Forcibly drain the oil, let the lower bearing of the tower crane and the standard section be connected slowly, and then remove the balance valve and replace it with a new one.
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The hydraulic device, equivalent to a large jack, uses the hydraulic pump to pressurize, transmits the pressure to the oil top through the oil cylinder, the oil top valve stem stretches out, the gold beam resists the standard section climbing claw, stretches to the maximum, inserts the stability from the sleeve hole, blocks the climbing claw, the valve stem retreats into the next cycle, when jacking up a section, pulling in the standard section, tightening the screw, and so on.
1. When the jacking height is about 15 cm, I am most afraid of sliding cylinders and bursts at this time. The correct way is to stop when lifting 5 to 10 cm, descend to the original position, and repeat this 3 times to confirm that it can stop and not slide, and the pressure gauge pointer reading is normal, and then start to officially jack. >>>More
It should be determined according to the number of manufacturers' design requirements, and the tower crane models, design requirements, and the height of the standard section of different manufacturers are not the same, so there is no standard answer. Hint: Be sure not to go higher than the height required by the manufacturer.
The jacking operation is carried out below the wind speed, that is, the level 4 wind. >>>More