Shaanxi Zhongtuo Mine Equipment Co.,Ltd
Shaanxi Zhongtuo Mine Equipment Co.,Ltd
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There are two kinds of jacking up and down jacking
① The lifting method jack is supported upside down on the pad under the fulcrum of the roof structure, and the pad is the future column cap. In the beginning, the column cap is supported on both sides of the column base block. With the oil inlet and return of the jack, the temporary pad is filled in and the formal column block is replaced, and the column cap will gradually raise the roof structure. The column block is square and door-shaped (see the figure [schematic diagram of the lifting process of the upper jacking method and the column block diagram]). During the installation of the column block, it is advisable to lay cement mortar and welded sidebars in time, and seal the opening of the column block to enhance the stability of the column. In the upward jacking method, the lifting weight of the jack is constant and the stability is better, so it is widely used at present. Since it is a high-altitude operation, measures should be taken during the jacking process to prevent the roof structure from shifting, and attention should be paid to the synchronization of jacking.
② Lower jacking method. The jack is always placed on the column base, and the column blocks are filled with the top, which can reduce high-altitude operations, but the jacking weight gradually increases, especially when the movable fulcrum is formed at the column base, the stability is poor, and it has been seldom used.
Application of Bridge Construction Jack
Hydraulic jacks are smaller in size and can produce greater working capacity, especially used in places with narrow spaces, and have the functions of lightness, flexibility, and high jacking force. This product is widely used in electric power, the chemical industry, steel, bridges, machinery, etc. And other enterprises, and play its infinite power.
Technical Parameter of Bridge Construction Jack
| Model | Tonnage Ton | Piston Stroke mm | Height mm | Extension mm | Cylinder outer diameter D(mm) | Weight Kg | Work pressure Mpa(bar) |
| RM-TRCS-101×4 | 10 | 38 | 88 | 126 | 70 | 4.1 | 63 (630) |
| RM-TRCS -201×4 | 20 | 45 | 98 | 142 | 88 | 5 | 63 (630) |
| RM-TRCS -302×4 | 30 | 62 | 117 | 179 | 104 | 6.8 | 63 (630) |
| RM-TRCS -502×4 | 50 | 60 | 122 | 182 | 138 | 10.9 | 63 (630) |
| RM-TRCS -1002×4 | 100 | 57 | 141 | 198 | 188 | 22.7 | 63 (630) |
Precautions of Bridge Construction Jack
1. When the hydraulic jack is in the lifting operation, it is necessary to choose a hydraulic jack with a suitable tonnage: the carrying capacity should not be overloaded, and the carrying capacity of the selected hydraulic jack must be greater than 1.2 times the weight of the heavy object; the lower height of the hydraulic jack is appropriate, in order to facilitate removal, The minimum height of the hydraulic jack should be adapted to the clearance at the bottom of the heavy object. When the sleeper is used to support a heavy object during the lifting process, the lifting height of the hydraulic jack should be greater than the sum of the thickness of the sleeper and the deformation of the sleeper.
2. If multiple hydraulic jacks are used to lift the same equipment, the hydraulic jacks of the same type should be selected, and the sum of the rated lifting capacity of each hydraulic jack should not be less than 1.5 times the gravity of the equipment it bears.
3. The hydraulic jack should be wiped clean before use, and all parts should be checked for flexibility and damage. Do not remove the quick connector when there is a load, so as to avoid accidents and damage to parts.