Method for manufacturing saw-toothed tube plates used for finned tube heat exchanger

Abstract

The invention relates to a method for manufacturing saw-toothed tube plates used for a finned tube heat exchanger. The method comprises the following steps: a tube plate is integrally divided into an upper straight plate, a middle porous plate and a lower straight plate in the vertical direction; in the horizontal length direction, a plurality of rows of parallel tube holes are formed in the middle porous plate according to the number of finned tubes, wherein the adjacent rows of tube holes are staggered; the center lines of the adjacent rows of tube holes are connected from the top down to form saw-toothed connecting lines; the middle porous plate is cut into a plurality of saw-toothed plates along all the saw-toothed connecting lines and in the direction vertical to the length direction; and the plurality of saw-toothed plates and the finned tubes are assembled and welded, and after assembly, beveling grooves of the whole surface of the middle porous plate, and the upper and the lower straight plates are double-welded into a whole. According to the invention, the cut saw-toothed plates have smaller length and width and have stronger bending and deformation resistance capability; planeness of the assembled tube plates can be easily guaranteed; the tube plates are uniform in force exertion and dispense with additional reinforcing plates; not only is the appearance decent, but also consumption of material and workload of welding are reduced; and the tube plates hardly deform during use, and the service life of the heat exchanger is guaranteed.

Description

technical field [0001] The invention relates to the technical field of heat exchange devices, in particular to a method for preparing a zigzag tube plate used in finned tube heat exchangers. Background technique [0002] At present, in metallurgy, power, petrochemical, air-conditioning and other industries, in order to enhance the heat exchange effect or achieve the purpose of making the heat exchanger efficient and compact, finned tube heat exchangers have been widely promoted and applied. As one of the components of the finned tube heat exchanger, the tube plate is used to assemble with the finned tube, the main heat exchange element of the heat exchanger, and plays the role of fixing and supporting the finned tube. The assembled tube sheet and heat exchanger shell can be fixed directly by welding, and at the same time play a role in supporting the weight of the entire heat exchanger. The design, manufacture, and assembly process of the tube sheet have a great effect on c...

AI Technical Summary

Problems solved by technology

The overall cutting workload of this method is large

And due to multiple cuts, the strength of the tube sheet assembled with the finned tube is poor. Generally, it is necessary to increase its strength by welding the ribs around it, which increases the amount of materials and welding

The straightness of the cut sawtooth plate cannot be guaranteed after reassembly. After the heat exchanger is put into use, the tube plate is prone to bending deformation, which affects the service effect and life of the heat exchanger.

[0003] At present, the first form is only used when the tube bundles are less, the arrangement is sparse, the amount of welding is small, and the manufacturing cycle is long.

The second form has a wider application range, but as mentioned above, many places need to be improved

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