Machining method of spiral baffle plate substrate for shell-and-tube heat exchanger

Abstract

The invention relates to a machining method of a spiral baffle plate substrate for a shell-and-tube heat exchanger, and belongs to the field of chemical equipment. The machining method of the spiral baffle plate substrate for the shell-and-tube heat exchanger is characterized by comprising the following steps of firstly, manufacturing a circular ring plate; secondly, stretching the circular ring plate into single spiral sheets; thirdly, splicing the single spiral sheets into a continuous spiral sheet; and fourthly drawing continuous spiral sheet into the spiral baffle plate substrate.

Description

technical field [0001] The invention relates to a processing method of a helical baffle base plate for a shell-and-tube heat exchanger, belonging to the field of chemical equipment. Background technique [0002] A curved surface formed by the helical motion of a generatrix perpendicular to the axis around the axis is called a helical surface. the spiral surface. The screw conveyor (auger) is a helical blade with a larger inner diameter, because the shaft or tube needs to be welded in the middle of the auger to obtain a rotating driving force; while the spiral baffle in the shell-and-tube heat exchanger is static, in order to ensure the distribution of the auger. To reduce the number of tubes, and to reduce the flow rate of the short circuit in the middle of the liquid, to ensure the heat transfer efficiency, a helical baffle with the smallest inner diameter is required. [0003] The current method is the mold production method, that is, according to the helical surface of ...

AI Technical Summary

Problems solved by technology

The biggest shortcoming of this implementation is that the adaptability of the forging die is poor, and it cannot meet the processing of various specifications of helical panels.

[0005] Patent No. ZL 2005100430335 discloses a patent for a shell-and-tube heat exchanger with continuous spiral baffles. In the second processing method of the specific embodiment, a method for manufacturing a spiral plate using a pull-tab fixture is provided. This method needs to be A small sector is cut off from the ring sheet, and when selecting materials, ensure that the inner and outer diameters of the ring sheet are larger than the inner and outer diameters of the formed spiral sheet. The drawn spiral sheet needs subsequent beating treatment to make the adjacent sheet The surface should be as close as possible. The biggest disadvantage of this implementation is poor machining accuracy, complex procedures, and too many uncertain factors, which cannot guarantee the stability of the quality of the spiral plate, and it is difficult to realize industrial production.

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