Heavy work hydraulic jack for bridge
When the heavy work hydraulic jack is used for lifting, the hydraulic jack of suitable tonnage should be selected. The carrying capacity should not be overloaded. Generally, the carrying capacity of the hydraulic jack should be greater than 1.2 times the weight of the weight. The minimum height of the hydraulic jack is suitable. In order to facilitate the removal, The minimum height of the hydraulic jack should be adapted to the clearance at the bottom of the weight. When the sleeper supports the heavy object during lifting, the lifting height of the hydraulic jack should be greater than the thickness of the sleeper and the deformation of the sleeper.
If multiple hydraulic jacks are used to jointly lift the same equipment, the same type of hydraulic jacks should be used, and the sum of the rated lifting weight of each hydraulic jack should not be less than 1.5 times the gravity of the equipment.
The hydraulic jack should be wiped clean before use, and all parts should be checked for flexibility, damage and oil leakage. Never remove the quick connector when there is a load to avoid accidents and damage to components.
The heavy work hydraulic jack for bridge should be placed flat before use and cannot be tilted. The bottom should be leveled to prevent the foundation from sinking or the load being shifted to tilt or tip the hydraulic jack. A strong pillow or steel plate can be placed on the bottom of the hydraulic jack to expand the pressure bearing area to avoid accidents caused by falling or sliding. Do not use oil-stained wooden boards or steel plates as pads to prevent slipping and safety accidents when stressed. The place where the heavy object is lifted must be a safe and solid part to prevent damage to the equipment.
When using hydraulic jacks, you should first try to lift a part of the weight, carefully check the hydraulic jack for any abnormalities, and then continue to lift the weight. If it is found that the backing plate is uneven, unsteady or the hydraulic jack is inclined and leaking oil, the heavy work hydraulic jack for sale must be relieved of pressure and returned to the ground, and then be handled in time before being operated again.
In the process of jacking up, a safety sleeper should be padded under the weight in time as the weight continues to rise, to prevent the accidental fall of the piston caused by the tilting of the hydraulic jack or the burst of the oil pipe. When lowering heavy objects, gradually pull out the sleepers, and the distance between the sleepers and the heavy objects must not exceed the thickness of a sleeper to prevent accidents!
When the heavy work hydraulic jack needs to be loosened, it is only necessary to slightly open the oil return valve so that it can be lowered slowly, and cannot be lowered suddenly, so as not to damage the internal cup and cause damage to the cylinder.
If the lifting height of the heavy object needs to exceed the rated height of the hydraulic jack, first put the sleeper under the heavy object jacked up by the hydraulic jack, lower the hydraulic jack, raise its bottom, and repeat the jacking until the required jacking height.
Nine, hydraulic jacks can not be used as permanent support equipment (nut self-locking hydraulic jacks can be used for long-term support). If long-term support is needed, the supporting part should be added under the heavy object to ensure that the hydraulic jack is not damaged.
Hydraulic jacks shall not be used in an environment higher than 80℃.
When the heavy work hydraulic jack and high-pressure oil pipe are separated, the pressure should be eliminated first, and then the dust cover of the joint should be screwed on.
The heavy work hydraulic jack should be stored in a dry and dust-free place, not suitable for use in the workplace with acid, alkali and corrosive gases, and it should not be placed outdoors in the sun and rain!