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Dołączył: 29 Paź 2010
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 Wysłany: Wto 5:22, 04 Sty 2011 Temat postu: moncler veste No installation _3902 drum stand |
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The installation of the drum without stent
Drum weight 13 tons, placed more than 9 meters elevation, no frame support, but there is a platform below it, according to this condition, the available crane lifting the drum to the desired location, then the support of steel platform with operating gantry will use steam Pack hanging up. Operating platform for the 32, I-beam main beam, there is no problem by force account. Ssangyong own site welded door frame, with four manual hoist to hang up while using the drum hoist for manual leveling, shown in Figure 2. Manual hoist [Received】 2005 for a one O5 O8 [Author】 Wu Shidong (1972 a), M, Maoming, Guangdong, mainly engaged in the chemical engineering building, an assistant engineer. /---- \ Hoisting drum diagram of Figure 2 7 2005 5132 Chemical leveling Guangdong (1) leveling processes: in place of a fine size to find a location to install the installation elevation of the level of the beginning of a horizontal fine looking to find the level of the beginning of a longitudinal horizontal level to find a level of refinement to find a portrait of a fine bay looking for a repeat test spot, locking down chains of a retest. (2) The size of fine looking installation position, the three rows of tubes from the mouth of the election of a nozzle, under the rope hanging from the SAIC package corresponding to the nozzle following the furnace to ensure that the nozzle-one correspondence. (3) the elevation and level to find peace, find the center line of the base drum, set up water level detection to ensure accuracy. (4) leveling and re-install the deviation measure to meet the requirements of drum,[link widoczny dla zalogowanych], the locking manual hoist and drum spot with a temporary support will be fixed again after the installation of boiler retest precision,[link widoczny dla zalogowanych], and its value by \low pressure chemical equipment construction and acceptance - HGJ209-83) were compared. As follows: 14o0XD (BXY (C) B (C) Figure 3 Figure 1 drum drum leveling operations installation accuracy of the retest data of 33 up pipe, down pipe welding welding process to determine 3.3.1 E) steam package over material for the 20g, tubes made of 16Mn, furnace take over the material for 16Mn. To do with the sample tube welding 16Mn to develop welding procedure qualification,[link widoczny dla zalogowanych], to determine the optimum welding parameters in Table 2. Optimum welding parameters in Table 2 Table Note: Tube with V-groove, gap 3mm, welded layers 5 layers 3.3.2 Implementation of welding furnace installed for left slope of 1.5%, Therefore, each increase in the length of tube and down tube are not the same. When prefabricated pipe, one end of the first good groove processing. Other end of the reserve margin 100mm, group of electric grinders and then when the actual length of the cutting,[link widoczny dla zalogowanych], preparation groove, both to ensure that the amount of the weld gap, it will not because the material deviation, equipment, the impact of slope failures caused by work . Group, by the decline in low arc tube furnace start up step by step, and then straight from long to short is, first consider the choice of eight pipe up pipe should first meet, and second straight pipe than the pipe is easily adjusted. Pipe wall thickness due to thick, up to l8mm, welding layers are more easy to produce deformation, residual stress is large, so the welding sequence is essential. We press the \Color rendering inspection after welding, some of the obvious, larger defects early elimination, so as to avoid difficulties after welding repair. As a precaution, root pipe welds in all the backing l2 after retest on the drum to ensure quality control value does not exceed the allowed range. In order to improve welding quality and reduce the welding repair, to select excellent welder is necessary. 3A welding effect inspection and retest the drum by the end of the effective control of welding, l2 root welding work over the one-time success, vertical,[link widoczny dla zalogowanych], interface gap, misalignment and other quality control parameters in the \construction and acceptance - GB50236-98 \X-ray inspection after welding, a pass rate of 99.3%, only one failed chip and repaired by a qualified. After welding, all of the support points and manual removal of hyacinth, keep the drum in a free state, retest, the installation of good quality, value as shown in Table 3. Table 3 Numerical installation quality drum / mm from the above data shows that after the removal of all temporary hanger installed in the control of the value of the drum only minor changes, to achieve the desired effect. Grasp the entire construction process lifting, leveling and welding, and other key aspects of the development of effective construction process is the key to a successful installation. From an economic point of view, the construction method is simple and economical.
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