Circular pipe communicated, spliced, edge-pinched, and welded pressure-bearing heat exchanger, and manufacturing process thereof

Abstract

The invention discloses a circular pipe communicated, spliced, edge-pinched, and welded pressure-bearing heat exchanger, and a manufacturing process thereof. The heat exchanger comprises two headers, wherein a tap water communication pipe is fixedly connected between the two headers; a hot air heat supply pipe passes through the tap water communication pipe; each header is formed by welding two arc plates; the plate edges of the arc plates are flanged outwards; the plate edges of the two arc plates are aligned with each other and are subjected to edge-pinching and self-fluxing welding to form a circular tubular header cylinder body; head blocking plates of the headers are flanged outwards and are embedded at two ports of the circular tubular headers; and the two edges are aligned with a pipe wall surface, are spliced and are subjected to the edge-pinching and the self-fluxing welding to form the headers. An installation hole is punched on each arc plate; the installation hole is stretched inward an arc to form an edge; the aperture and the height of are stretched according to the arc plates; and the end surfaces of the two ends of the tap water communication pipe are subjected to R-angle cutting according to the stretching hole diameter and the stretching height of the arc plates, and then the tap water communication pipe is inserted into the installation holes stretched from the arc plates, are matched with each other, are spliced and are subjected to edge-pinching and self-fluxing welding connection. In the heat exchanger, welding seams are spliced, the edge-pinching welding is easy to realize, and water leakage is avoided; and the heat exchanger is good in pressure-bearing performance, and low in maintenance cost.

Description

technical field [0001] The invention relates to a heating water heater installed and used on the heating pipeline of civil households, which can be used for heating and exchanging hot tap water for bathing, especially relates to a stainless steel water storage or instant heating round pipe connected and connected, pinched A welded pressure water exchange heater and its manufacturing process. Background technique [0002] The applicant's related patents: applied on June 10, 2008, authorized on June 30, 2009, the patent number is 200820024167.1, the authorized announcement number is CN201251383Y, the name of the utility model: "Header diversion heat storage countercurrent heat exchanger" . It was applied on January 7, 2011, authorized on September 14, 2011, and the announcement number is CN201974076U. The name of the utility model is: combined-phase instantaneous heating type countercurrent heat exchanger. [0003] Most of the original patents are designed for the heat excha...

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Problems solved by technology

Even if the original patent works well, it will be eliminated due to leakage defects

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