A brazing fixture for plate-fin heat exchanger

Abstract

The invention discloses a braze welding clamp of a plate-fin type heat exchanger. The clamp consists of a nut, a top bolt, a side top bar, a spring, an upper cover plate, a plate-fin structure, a lower bottom plate, a vertical bolt, a supporting plate, a measuring rod, a pressure plate, a middle top bar, a side guide sheet, a middle guide sheet, a bolt, a rolling ball and a pin, wherein the pressure plate is additionally arranged between the side top bar and the middle top bar; the measuring rod is inserted into the pressure plate in a through hole; the spring is placed between the supportingplate and the pressure plate; the supporting plate is placed on the upper cover plate; the plate-fin structure is positioned between the upper cover plate and the lower bottom plate; a part among thepressure plate, the upper cover plate and the lower bottom plate is of a hollow-out structure; the side top bar is assembled with the middle top bar through matching of a bolt and a nut; and each topbar is assembled with the lower bottom plate through matching of a bolt and a nut. The braze welding clamp can apply uniform pressure to the plate-fin structure in a vacuum braze welding process, so that distance among welding seams is reduced, a welding rate is increased, welding defects are reduced, and strength and plasticity of a braze welding joint are improved; and moreover, the clamp is high in heat transfer efficiency, is convenient in dismounting, and can shorten a braze welding period.

Description

technical field [0001] The invention relates to the field of welding processing tools, in particular to a brazing fixture for a plate-fin heat exchanger. Background technique [0002] Energy is the foundation and driving force of modernization, and energy supply and security are related to the overall situation of my country's modernization drive. At present, my country's demand for energy resources is increasing day by day, ecological and environmental problems are prominent, the pressure to adjust the structure, improve energy efficiency and ensure energy security is further increasing, and energy development is facing a series of new problems and challenges. In recent years, my country has proposed to develop modern industries that are low-carbon, environmentally friendly, energy-saving and emission-reducing. Improving energy utilization and reducing energy consumption have become the key to the development of modern industry. [0003] In high-energy industries such as ...

AI Technical Summary

Problems solved by technology

[0004] For plate-fin heat exchangers serving at high temperatures, the conventional soldering or brazing methods can no longer meet the requirements of high temperature resistance, high pressure resistance, strength and service life.

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