Device and method for adjusting flange coaxiality
A technology of coaxiality and adjustment method, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the high requirements of pipeline flange reassembly accuracy, increase the risk of radiation dose of maintenance personnel, and the level deviation of pipeline supports. major problems, to achieve the effect of improving maintenance quality, reducing operation risks, and high versatility
Inactive Publication Date: 2019-09-10
CNNC FUJIAN FUQING NUCLEAR POWER
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Problems solved by technology
[0003] ① There is pipeline stress during the pipeline installation stage, and the flange bolts are restored to the natural state after disassembly, resulting in a large deviation in the coaxiality of the flange, and the coaxiality cannot be guaranteed during reassembly;
[0004] ②The level deviation of the horizontal pipeline flange is large due to the large deviation of the levelness of the pipeline support on site. After the flange bolts are removed, the pipeline will fall as a whole, and the coaxiality of the flange cannot be guaranteed when reassembling;
[0005] ③The requirements for parallelism and coaxiality of the pipeline flange are high, and it takes a long time to adjust the pipeline flange, which greatly increases the work period, etc.
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[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0048] Such as Figure 1~3 A device for adjusting the coaxiality of flanges is shown, which adjusts the coaxiality of pipeline flange A1 and pipeline flange B10, including bolts 2, gaskets 3, positioning pins 4, L-shaped support frames 5, fixing Bolt 6, lock nut 7, adjusting bolt 8.
[0049] Flange bolt holes 9 are processed on the pipeline flange A1.
[0050] The positioning pin 4 is a cylindrical pin with different diameters, its large diameter section is located in the flange bolt hole 9, and its small diameter section is located outside the flange bolt hole 9. The radial fit gap between the flange bolt hole 9 and the positioning pin 4 is 0.08-0.20 mm. Drill and tap on the end face of the small-diameter section of the positioning pin 4 .
[0051] A pin hole A is processed on one leg of the L-shaped support frame 5 , and the axi...
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The invention relates to the technical field of nuclear power maintenance, and particularly discloses a device and a method for adjusting flange coaxiality; by adjusting the coaxiality of two pipelineflanges in a vertical direction and a horizontal direction respectively, finally the coaxiality and parallelism of the two pipeline flanges meeting the reloading requirement are realized. The deviceand method provided by the invention can cover more than 95% of the coaxiality adjustment of the pipeline flange by adjusting the design size of a positioning pin and an L-shaped support frame of thedevice; and the invention has the reference significance for adjusting the coaxiality of other various types of flanges, high expandability and high universality.
Description
technical field [0001] The invention belongs to the technical field of nuclear power maintenance, and in particular relates to a device and method for adjusting the coaxiality of flanges. Background technique [0002] Nuclear power units have many system pipeline flanges, and the key step in their maintenance is the rotation quality of the flanges. The quality of flange reassembly is not good, such as low coaxiality, low parallelism, etc., which may easily cause defects in the system, such as leaking, leaking, and leakage, and cause the system to be unavailable for a certain period of time, which not only affects production efficiency, but also poses a major safety hazard, especially Doing so in a nuclear power plant will seriously threaten the safe operation of the unit. The main problems currently existing: [0003] ①There is pipeline stress in the pipeline installation stage, and the flange bolts are restored to the natural state after disassembly, resulting in a large ...
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IPC IPC(8): B23P19/10
CPCB23P19/10
Inventor 吴明杜召瑞文学江腊涛刘检军童益华安峰杨全超陈锦裕田涛李宏林淞陈勇
Owner CNNC FUJIAN FUQING NUCLEAR POWER