After the foundation of the field hardened compressor plant is completed, in order to increase the ground bearing capacity and meet the requirements of the bearing capacity of the large compressor unit transport trailer and the heavy crane foot, it is necessary to carry out the tamping backfilling of the pavement and the crane in the plant area before lifting. Taking the local soil quality of Jiuquan Compressor Station as an example, it is necessary to harden the site in the 40m×50m area on the south side of the compressor plant. Take the natural floor to dig 50cm, then the bottom layer is paved with gravel 30cm, and the upper part is tamped backfilling with 3:7 ash. The hoisting is located on both sides of the compressor foundation, and the excavation is 1m deep under the 2.5m×2.5m area of ​​the crane leg. The gravel is backfilled, the upper δ=25mm steel plate is used, and the box-supported leg block is provided on the steel plate. m × 1.5m) support. Ensure that the bearing capacity of the foundation reaches 200~250kPa, which meets the safety requirements of the normal operation of the trailer and the lifting operation of the crane. Installation and leveling of the anchor bolts The thickness of each horn is measured to calculate the cumulative height of each bolt horn; the relative elevation and overall level of each set of horns are measured, and the horn is measured according to the elevation of the bolster. Leveling work. That is, the final horn height of each bolt is determined by repeated measurement adjustment. After the measurement is completed, each set of horns is numbered, corresponding to the anchor bolts and sealed, and placed in place after the compressor enters the field, so as to fully meet the leveling requirements of the unit. The hoisting technology is prepared to calculate the diameter and length of the wire rope used for lifting the compressor æ’¬ and gas turbine ã€, the rope buckle on the balance beam, the lower rope buckle, the plate hole type lifting lug, the 20t inverted chain to meet the lifting safety requirements, and the compressor Ready before entering the venue. Since the gas turbine foundation is 290mm higher than the compressor raft foundation, in order to ensure that the trailer can enter the upper part of the foundation, a layer of road is placed on the base part of the compressor raft, and the non-slip bamboo bolster plate is placed on the road wood (the bamboo skin is pressed 5 Plywood) prevents the trailer from pushing the wood during the reversing process and damaging the anchor bolts. After the concrete construction is completed, clean the ground part of the embedded bolt and apply 2mm thick molybdenum disulfide (butter), wrap cotton yarn and put on the PVC pipe for protection. Safety selection and calculation of hoisting equipment Since the weight of the compressor is greater than that of the gas turbine, the selection of large-scale automobile cranes is based on the calibration of the compressor. (1) According to the principle of stability lifting, it is proposed to use two crane lifting equipment in place. According to the formula, in the case of considering the safety factor, calculate the load G=K1×K2×(G0+G1), then the load force of each car is G/2=69t. According to the equipment of the local lifting equipment, 200t, 170t can be provided. Work with a large 150t crane. After checking the "200t car suspension performance operation table", the 200t crane has a maximum lifting capacity of 71t in the case of a boom length of 24.4m and a working radius of 9m; according to the 170t crane performance table, the working radius is 7m. Under the 170t car crane, the maximum lifting capacity is 75.5t, so a 200t and a 170t car crane can meet the lifting weight requirements. (2) Calculate the radius of the car's crane operation Rmin=1/2(L1+L2) according to the formula. When the working radius of the 200t car is R=9m, the radius of the 170t steaming operation is R=7m, and the maximum lifting height of the two cranes is Hmax=23.7. m, and the lift height of two cars is Hmin=H1+H2+H3+H4+H5+H6=0.9+4.4+0.6+0.6+3.8+0.2=10.5m. Since Hmax>Hmin=10.5m, the single-machine load calculation load of the crane is 69t, so the compressor For hoisting operations, the 200t and 170t cranes can be used for double crane lifting to meet the safety and economic needs of equipment lifting. In summary, China National Petroleum Pipeline Co., Ltd. adopts the double-machine lifting method to carry out the lifting of the largest compressors and gas turbines in the country. It only successfully completes the lifting and precision alignment of the large-tonnage compressor unit in 4 hours; the construction period is short and the construction efficiency Gao provides an example for the installation of large-scale compressor stations in the petroleum and petrochemical industry. Cleaning Robot,Smart Clean Robot,Smart Vacuum Cleaner,Robot Vacuum Cleaner Yantai Xituo Intelligent Technology Co., LTD , https://www.xtznautomation.com