Low-cost high-weldability seal

Abstract

The invention relates to a low-cost high-weldability seal which comprises a seal body, wherein a through-going positioning hole is arranged in the seal body, two opening parts are arranged on the seal body at a side face of the positioning hole, an opening end of the positioning hole is arranged between the two opening parts, the opening parts expand outwards, and the distance between the end parts of the two opening parts close to the opening end is larger than the distance between the end parts of the two opening parts close to the positioning hole. In the invention, as a first adjusting hole is located at the middle part of the seal body, the weight of the seal is reduced; thus, the weight of a core body of a heat exchanger is reduced, the power consumption for the brazing is saved, and the cost for the product is reduced; the low-cost high-weldability seal has the advantages of small heat capacity, small contraction distortion, uniform heat stress, good welding performance with peripheral connecting pieces and high brazing qualification rate; when the seal body is assembled in the core body, the compression resilience of the opening parts and a clamping force are balanced by the action of the clamping force, so that the seal body is beneficial of compaction and control of the gap between weld seams, and therefore the core body has good weldability; moreover, the low-cost high-weldability seal has the advantages of simple and compact structure and convenience for installation and use, wide application range, safety and reliability.

Description

technical field [0001] The invention relates to a seal, especially a low-cost and high-weldability seal, specifically a seal used for welding the core body of an aluminum plate-fin heat exchanger, which belongs to the manufacture of plate-fin heat exchangers. technology field. Background technique [0002] Plate-fin heat exchanger is a heat exchanger widely used in construction machinery, chemical equipment, compression machinery, medical equipment, etc. The main functional part of this heat exchanger is the core. The core body is formed by brazing and welding of partitions, seals, fins and cover plates. The seal is a key part in the core that makes each part form a sealed structure. The seal occupies a large proportion in the heat exchanger core. The prior art of the seal is a solid body with heavy weight and large heat capacity. On the one hand, it consumes electric energy during brazing. On the other hand, the cooling process after brazing will produce a certain shrin...

AI Technical Summary

Problems solved by technology

The prior art of the seal is a solid body with heavy weight and large heat capacity. On the one hand, it consumes electric energy during brazing. On the other hand, the cooling process after brazing will produce a certain shrinkage deformation. The effect of thermal stress will affect the connection with the surrounding thin-walled parts. welding, thus affecting the qualified rate of brazing, which also affects the quality of the product

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