Heat exchange plates, heat exchange plate pairs, plate packs and welded plate heat exchangers for welded plate heat exchangers

Abstract

The invention provides a heat exchange plate used for a welding type plate heat exchanger, a heat exchange plate pair, a heat exchange plate set and a welding type plate heat exchanger. The corner of the heat exchange plate horizontally extends to form a transverse connecting part in a diagonal line direction of the corner; one side, opposite to the heat exchange plate, of the transverse connecting plate is bent to form a first connecting folding side; other two sides of the transverse connecting part are bent to form a first folding side and a second folding side; adjacent side edges of the heat exchange plate are bent to form a second connecting folding side and a third connecting folding side; and the heat exchange plate is superposed to form a medium runner which is sealed in two ends and is through in other two ends. According to the heat exchange plate provided by the invention, the transverse connecting part is additionally arranged to have guide effect to a fluid, and a flow dead zone is absent in the runner, so that the heat exchange efficiency of the heat exchange plate is improved, and influences of scaling and corrosion to the heat transfer efficiency and the service life of the heat exchange plate are reduced; a right-angled connecting mode of adjacent two sides on the corner of the heat exchange plate is changed, so that a deformation phenomenon generated when the heat exchange plate bears medium pressure difference is avoided; and a processing process for the heat exchange plate is simple, and is high in realization degree.

Description

technical field [0001] The invention relates to the field of plate heat exchangers, in particular to a heat exchange plate for a welded plate heat exchanger. Background technique [0002] At present, the plate heat exchanger has become an efficient and compact heat exchange equipment, which is widely used in industry, and its development has experienced a history of hundreds of years. Among them, the welded plate heat exchanger developed to adapt to high temperature and high pressure conditions has further expanded the application field of plate heat exchangers. [0003] Among the published patents on welded plate heat exchangers, patents CN1606682A and CN202057615 U disclose a heat exchange plate of a welded heat exchanger. The corners of the heat exchange plate are provided with protrusions for connecting the heat exchange plates. The heat exchange plate is connected and assembled through this structure, but the strength of the protruding piece itself is limited by the th...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a heat exchange plate, a pair of heat exchange plates, a plate group and a welded plate heat exchanger for a welded plate heat exchanger, so as to solve the problem that the connection structure of the heat exchange plates for a welded heat exchanger cannot Participate in the heat exchange process of the heat exchange plate, reduce the heat transfer space of the heat exchange plate, and the strength of the connection is low, and the welded connection form is not suitable for use in welded plate heat exchangers

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