A positioning method for installing flange bolts of hot gas ducts in high-temperature gas-cooled reactors
A technology of high-temperature gas-cooled reactors and flange bolts, which is applied in the direction of manufacturing tools, hand-held tools, etc., to achieve the effect of convenient operation and simple operation
Active Publication Date: 2019-12-20
RES INST OF NUCLEAR POWER OPERATION +1
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AI Technical Summary
Problems solved by technology
After the main bolts are pre-tightened, the looper flange of the hot gas duct shell forms a complex nonlinear system for the bolts, nuts, and metal sealing rings of the hot gas duct shell. At present, there is no such technical research in China.
Method used
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Experimental program
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Embodiment Construction
[0027] A positioning method for installing flange bolts of a hot gas conduit of a high-temperature gas-cooled reactor, the method specifically includes the following steps:
[0028] Step 1. Adjust the flange surface of the hot gas conduit of the high temperature gas-cooled reactor;
[0029] Step 1.1. Put the looper flange of the hot gas conduit shell into the shell of the hot gas conduit horizontally, so that the loop flange and the shell of the hot gas conduit are at the same angle;
[0030] Step 1.2. Align the guide bolt holes, position through the three guide bolts, and install other bolts;
[0031] Step 1.3. Use the arc-shaped gasket to adjust the positioning accuracy of the guide bolts; use the inner hole of the loop flange to adjust the axis of the loop flange bolt hole to be perpendicular to the flange surface until the remaining vacant bolt holes are completed, and after the adjustment is in place, exit arc gasket;
[0032] Step 2. Assemble the main bolts;
[0033] ...
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The invention relates to the technical field of positioning of flange bolts of a hot gas conduit of a high temperature gas cooled reactor and particularly discloses a positioning method for the flangebolts of the hot gas conduit of the high temperature gas cooled reactor. The positioning method comprises the following steps: (1) adjusting a flange surface of the hot gas conduit of the high temperature gas cooled reactor, namely (1.1) horizontally arranging a loose flange of a hot gas conduit shell into a housing of the hot gas conduit shell in a sleeving manner; (1.2) aligning the loose flange to guide bolt holes and positioning by using three guide bolts; (1.3) adjusting the position precision of the guide bolts by utilizing arc-shaped gaskets; (2) assembling main bolts, namely (2.1) implanting guide positioning bolts to make sure that the axes of the guide positioning bolts are vertical to the flange surface; (2.2) installing the main bolts by utilizing an auxiliary supporting toolfor the bolts; (2.3) installing the main bolts in a grouping manner and detecting the perpendicularity of the axes of the main bolts and the loosen flange surface; and (3) stretching and pre-tightening the bolts. The positioning method for installing the flange bolts of the hot gas conduit of the high temperature gas cooled reactor provided by the invention is simple to operate, can be conveniently operated by a field operator and can guarantee in-place installation at a time.
Description
technical field [0001] The invention belongs to the technical field of positioning flange bolts of hot gas conduits of high-temperature gas-cooled reactors, and in particular relates to a positioning method for installing flange bolts of hot gas conduits of high-temperature gas-cooled reactors. Background technique [0002] The high-temperature gas-cooled reactor uses helium as the heat transfer medium, and the high-temperature helium circulates heat in the primary circuit. Helium at a temperature of 250°C is boosted by the main circulation fan, enters the lower part of the core through the outer ring pipe of the hot gas conduit, flows through the core from bottom to top and is heated to 700°C, and then enters the steam generator through the central ring pipe of the hot gas conduit After the temperature drops to 250°C, it returns to the inlet of the main circulation fan, forming a closed cycle of helium in the primary circuit. [0003] The flange surface of the hot gas cond...
Claims
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IPC IPC(8): B25B27/16
CPCB25B27/16
Inventor 刘强胡卉桦李彦宾
Owner RES INST OF NUCLEAR POWER OPERATION