Header shell pressure bearing heat exchanger

Abstract

Provided is a header shell pressure bearing heat exchanger. T-shaped reinforcing ribs are arranged on pipe hole spacing plate faces of a header inside hole plate and a plurality of shell round pipes. The heat exchanger is provided with one or more pipe heat exchange pipes, and the pipe heat exchange pipes are communicated in a hold-bending manner or communicated in a communicating pipe welding manner in an inner cavity of a header. A pipe connector III, a pipe connector IV and the other end of a collecting and connecting pipe are welded and communicated to form a pipe pass fluid circulating heat transfer channel. End cover plates, an end opening of the header inside hole plate or a header arc inside hole plate and an end opening of a header outside plate or header arc outside plate are sealed, welded and blocked to form a shell pass fluid circulating heat transfer channel. Two kinds of medium fluid in the heat exchanger flow through pipe pass of one or more pipe heat exchange pipes and / or a header inner cavity and shell pass of shell round pipe cavities for heat exchange. The T-shaped connector reinforcing ribs are additionally arranged to control the transverse plate edge deformation of the hole plates, so that hole plate welding connectors are free of cracking and water leakage, the structure stability of the heat exchanger is improved, and the two medium fluid channels can be interchanged for use.

Description

technical field [0001] The invention relates to the technical field of heating and ventilation, and relates to a heat exchanger for exchanging hot water by using heating air as a heat source, in particular to a pressure-bearing heat exchanger for a header shell made of stainless steel. Background technique [0002] The applicant filed an application on July 10, 2011. The name of the invention is "header pressure heat exchanger", the patent number is 201120255532.1, and the announcement number is CN202177324U. [0003] Applied on February 8, 2012, the name of the invention: "header double wall heat transfer edge welding heat exchanger", patent number: 201220040302.8, announcement number: CN202442615U. [0004] Applied on November 4, 2013, the name of the invention: "Multi-tube heat conduction heat exchanger for water storage heating with header and shell tube", patent number: 201320688555.0, announcement number: CN203605766U. [0005] The above-mentioned three prior art head...

AI Technical Summary

Problems solved by technology

However, it was found that the wall of the circular inner hole reinforcement plate is welded with the three walls of the pipe wall and the orifice wall. The circular seam of the pipe with a diameter of 76mm is 76×3.14=239mm, and the thickness of the welded workpiece increases when the three workpieces are integrated. High current consumption, high power consumption, slow welding speed, low production efficiency, many materials used in the processing and manufacturing of circular inner hole reinforced plates, waste of energy materials, high manufacturing costs and other defects

[0008] The orifice plate workpiece inside the header is a long porous plate with a length of 580-610mm and a width of 86-95mm. The hole diameter is 76mm and the holes are evenly distributed. The distance between the holes is 15-20mm. Multiple shell tubes are inserted into the header. The hole of the inner orifice plate is welded and connected with the pipe wall to form a header multi-tube orifice plate. The strength of the inner orifice plate of the header after the hole is opened does not meet the pressure requirements. The bending moment in the middle part of the general component is the largest. The lateral surface is bent outward under force, and the weld between the orifice plate and the tube wall of the pressure workpiece is relatively weak and prone to stability damage. The overall failure of the workpiece due to instability will cause cracks at the weld between the orifice plate and the nozzle or the outer plate and the inner orifice plate Cracks and leaks at the welds and cracks or defects at the ports of the header cover welded and blocked

[0009] It can be seen that the welding connection structure of the header heat exchanger in the prior art is unstable or unreasonable or the cost is high.

The two channels of medium and fluid cannot be used interchangeably, which is inconvenient for users to choose and install, and has defects such as small heat exchange area and low thermal efficiency

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