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A baffle support method with a small inclination angle helical baffle to realize a large helical lead

A technology of spiral baffles and support methods, which is applied in the direction of fixed catheter components, fixed tubular catheter components, lighting and heating equipment, etc., can solve the problems of large flow resistance, flow dead zone, damage, etc., and achieve cost reduction, Ease of mass production

Active Publication Date: 2018-10-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spiral baffle heat exchanger can overcome the disadvantages of the commonly used bow baffles, such as the flow dead zone, the large flow resistance, and the large support span of the tube bundle at the gap, which is easy to scale and induce vibration damage.
However, it is difficult to process the baffles of the spiral baffle heat exchanger with excellent performance, and it needs to be equipped with mold tooling with the same diameter and inclination angle, so the serialization of baffle diameter and inclination angle is very important, but by This will lead to poor matching of design parameters for applications that need to be between the two inclination angles in serialization. It may occur that if a smaller inclination angle is used, the resistance will be too large, and if a larger inclination angle is used, the heat transfer coefficient will be low The situation has affected the popularization and application of spiral baffle heat exchangers

Method used

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  • A baffle support method with a small inclination angle helical baffle to realize a large helical lead
  • A baffle support method with a small inclination angle helical baffle to realize a large helical lead

Examples

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Embodiment

[0025] Example: such as figure 1 with figure 2 As shown, a helical baffle support method with a smaller inclination angle to achieve a larger helical lead, taking a double-headed six-point helical baffle heat exchanger as an example, the helical baffle support method The parts involved include left tube plate 1, spiral baffle group 2, tie rod group 3, casing group 4, the number of which is 6 times the number of spiral baffles (the number of tie rod holes multiplied by 2, inclined washers 5, 7 nuts 6 ; The spiral baffle group 2 includes the first single-head spiral baffle group 2-1 and the second single-head spiral baffle group 2-2, and the spiral baffle groups are connected end to end The circumferential overlapping six-point spiral baffles 2-1-1 (hereinafter referred to as spiral baffles), the number can be determined according to the length of the baffle arrangement section of the heat exchanger tube bundle, the spiral lead and the number of spiral heads, etc. , each spir...

Embodiment approach

[0030] As a preferred embodiment of the present invention, the left ends of all tie rods (3) are screwed or welded to the left tube plate (1).

[0031] As a preferred embodiment of the present invention, the multi-head six-point spiral baffle heat exchanger adopts an equilateral triangle layout, and the number of tube passes is 1 or 2.

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Abstract

The invention relates to a baffle support method for realizing a large helical lead by a helical baffle with a small inclination angle, and the parts involved include a left tube plate, a spiral baffle group, a tie rod group, a casing group, an inclined washer group, and a nut group ; The inclined washers are used to correct the inclined surfaces on both sides of the tie rod holes of each spiral baffle; the peripheral tie rods are located on the outer side of the tube row where the adjacent baffles overlap in the circumferential direction; the casing group includes the end casing group, the peripheral In addition to the distance bushing group and the central distance bushing group, there are split bushing groups whose length is determined according to the spiral lead required by the design and arranged between adjacent spiral baffles. The support method of the present invention can solve the problem of poor performance in applications where the required inclination angle is between two serialized inclination angles, so that it can make full use of the allowable resistance pressure drop of the heat exchanger and improve the heat transfer coefficient .

Description

technical field [0001] The invention relates to a method for supporting a spiral baffle, in particular to the technical field of a method for supporting a baffle in which a spiral baffle with a small inclination angle realizes a large spiral lead. Background technique [0002] The shell and tube heat exchanger is still the mainstream type of heat exchange equipment because of its simple structure and high pressure. The spiral baffle heat exchanger can overcome the disadvantages of the commonly used bow baffles, such as dead zone of flow, large flow resistance, large support span of the tube bundle at the gap, easy scaling and induced vibration damage. However, it is difficult to process the baffles of the spiral baffle heat exchanger with excellent performance, and it needs to be equipped with mold tooling with the same diameter and inclination angle, so the serialization of baffle diameter and inclination angle is very important, but by This will lead to poor matching of d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D1/053F28F9/24
CPCF28D1/053F28F9/24F28D7/16F28D7/1669F28F9/22F28F2009/228
Inventor 陈亚平汤红铃吴嘉峰
Owner SOUTHEAST UNIV