Knife edge sealing type quick-release flange assembly applied to accelerator vacuum system

Abstract

The invention provides a knife edge sealing type quick-release flange assembly applied to an accelerator vacuum system. The flange assembly comprises a pair of knife edge flange plates, a copper ringand two chain hoops. The pair of knife edge flange plates are arranged in a back-to-back fit manner; a sealing surface is still manufactured by referring to a national standard knife edge flange; thecopper ring is used as a sealing ring, outer portions of the pair of knife edge flange plates are fixed and sealed through end-to-end bolt connection of two chain hoops; and during disassembly and assembly, only two connecting bolts need to be operated, disassembly and assembly time is greatly shortened, radiated time of operators is greatly shortened too, in addition, the copper ring is still selected as the sealing ring; and compared with the prior art, by using the assembly of the invention, machining difficulty and maintenance cost of the sealing ring are reduced, and operation cost of anaccelerator is further decreased.

Description

technical field [0001] The invention relates to a flange, in particular to a knife-edge sealing quick-release flange assembly applied to an accelerator vacuum system. Background technique [0002] At present, national standard knife-edge flanges are commonly used on accelerator vacuum pipes, which are locked and sealed with dozens of bolts. The copper rings used have low processing costs and can meet the connection of ordinary vacuum pipe interfaces of accelerators. The application technology is relatively mature. [0003] However, in the particle accelerator test device, the outer cavity of some beam testing equipment is directly connected to the vacuum pipeline, and the radiation dose tolerance of the beam testing equipment is limited. After the accumulated absorbed dose reaches a certain level, there is a high failure rate. The staff It is unavoidable to be affected by radiation dose when entering the site for equipment disassembly and installation. Ordinary knife-edge f...

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Problems solved by technology

[0003] However, in the particle accelerator test device, the outer cavity of some beam testing equipment is directly connected to the vacuum pipeline, and the radiation dose tolerance of the beam testing equipment is limited. After the accumulated absorbed dose reaches a certain level, there is a high failure rate. The staff It is inevitable to be affected by radiation dose when entering the site for equipment disassembly and installation

The ordinary knife-edge flange has more sealing bolts, and disassembly and installation take a long time. In order to effectively shorten the disassembly and assembly work time and reduce the radiation dose to the staff's physical injury, it is necessary to change the sealing method, reduce the disassembly steps, and quickly disassemble the flange. is a good solution

[0004] However, the common small-sized quick-release flanges commonly used at present are sealed with rubber rings, which are not suitable for the sealing requirements of large-sized accelerator pipes, and do not meet the requirements of the high-vacuum system of accelerators for sealing materials with low outgassing rate and high baking temperature; The prior art uses a quick-release flange that uses a diamond-shaped cross-section aluminum sealing ring as the sealing medium. The sealing effect is better, but the disadvantage is that the processing of the special-shaped aluminum sealing ring is difficult, and the price is much higher than that of the knife-edge flange. Copper sealing ring used, resulting in higher cost of disassembly and replacement

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