CN203837550U - Discontinuous and bi-directional warping type heat exchange tube - Google Patents

Discontinuous and bi-directional warping type heat exchange tube Download PDF

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Publication number
CN203837550U
CN203837550U CN201420227693.3U CN201420227693U CN203837550U CN 203837550 U CN203837550 U CN 203837550U CN 201420227693 U CN201420227693 U CN 201420227693U CN 203837550 U CN203837550 U CN 203837550U
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China
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section
tube
length
heat exchange
torque
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Expired - Lifetime
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CN201420227693.3U
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Chinese (zh)
Inventor
张立振
陈楠
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Wuxi Lan Hai Engineering Design Co Ltd
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Wuxi Lan Hai Engineering Design Co Ltd
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Abstract

The utility model relates to a discontinuous and bi-directional warping type heat exchange tube which comprises a warped section, a first straight tube and a second straight tube, wherein the first straight tube and the second straight tube are arranged at the two ends of the warped section, the warped section is composed of multiple units, third straight tubes are arranged between adjacent units, each unit comprises a leftwards warped tube section, a straight tube section and a rightwards warped tube section, each leftwards warped tube section is in the length of double torque, each rightwards warped tube section is in the length of double torque, each straight tube section is as long as the torque, and the length of torque is 120 mm - 500 mm. The discontinuous and bi-directional warping type heat exchange tube is simple in structure and reasonable in design. The heat transfer coefficient inside the tube is increased greatly. According to a heat exchanger composed of the heat exchange tubes, the tubes are arranged closely, a baffle plate is not needed for supporting, and therefore no flowing dead zone exists; furthermore, induction vibration between the heat exchange tubes can be overcome.

Description

The two-way torsion heat exchange pipe of a kind of interruption
Technical field
The utility model relates to a kind of heat transfer heat exchanger tube, relates in particular to a kind of two-way torsion heat exchange pipe that is interrupted, and belongs to heat exchange equipment manufacturing technology field.
Background technology
Along with the energy is constantly deficient, the efficient utilization of the energy is become to inevitable trend.Extensively exist the various diabatic processes such as heating, cooling, distillation, heating at the each industrial department of the national economy such as oil, chemical industry, metallurgy, heat exchanger is as the nucleus equipment in cooling system, cost accounts for the more than 35% of whole system equipment, therefore augmentation of heat transfer technology is applied to heat transfer equipment significant.
The structure of heat exchanger and heat exchange efficiency and cost have close relationship, wherein the impact of the operating efficiency of the shape heat exchanger of heat exchanger tube is even more important, tradition adopts segmental baffle light pipe heat exchanger, and this heat exchanger exists that heat-transfer effect is poor, shell-side pressure drop large, easily fouling and the shortcomings such as tube bank induced vibration occur.
Summary of the invention
The purpose of this utility model is in order to overcome the poor shortcoming of heat-transfer effect in existing heat-transfer pipe, provides a kind of simple in structure, without a kind of heat exchanger tube that is interrupted two-way distortion that changes heat transmitter syndeton and heat transfer coefficient and greatly increase.
The technical solution adopted in the utility model is as follows: the two-way torsion heat exchange pipe of a kind of interruption, comprise the first straight tube and second straight tube at distortion section and distortion section two ends, distortion section is made up of some unit, between adjacent two unit, be provided with the 3rd straight tube, each unit comprises left-hand distortion pipeline section, straight length and dextrad distortion pipeline section, ratio between the length of described left-hand distortion pipeline section, straight length and dextrad distortion pipeline section is 2:1:2, and the cross section of described left-hand distortion pipeline section and dextrad distortion pipeline section is oval cross section.
Further, the ratio of the major and minor axis radius of described oval cross section is 1.7:1.
Further, described left-hand distortion pipeline section is twice torque length, and described dextrad distortion pipeline section is twice torque length, and described straight length is one times of torque length, and described torque length is 120-500 mm.
Further, the length of described the 3rd straight tube is one times of torque, and torque length is 120-500 mm.The length of described the first straight tube and the second straight tube is 150mm,
Further, adopt some described one to be interrupted the tube bank of two-way torsion heat exchange pipe composition, the tube pitch of the two-way torsion heat exchange pipe of described each interruption is transverse, and in described tube bank, arbitrary cross section transverse supports mutually.
The beneficial effects of the utility model are: the heat exchanger structure of the utility model based on traditional, do not change contour structures and the connected mode of heat exchanger, heat exchanger tube is improved to and is interrupted two-way twisted tube, be interrupted two-way twisted tube intraductal heat transfer coefficient ratio smooth pipe intraductal heat transfer coefficient and improve 15 ~ 30%, improve 5 ~ 10% than unidirectional twisted tube intraductal heat transfer coefficient, be interrupted two-way twisted tube heat exchanger shell pass pressure drop ratio traditional round heat exchange of heat pipe shell-side pressure drop and reduce by 20 ~ 35%, identical heat exchange amount, the volume of heat exchanger reduces 20 ~ 40%, and required heat exchange area reduces 10 ~ 25%.
figure of description
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of the tube bank of the utility model composition.
Fig. 4 is the schematic diagram of the cross section of the tube bank of the utility model composition.
Reference numeral: left-hand distortion pipeline section 1, straight length 2, dextrad distortion pipeline section 3, the 3rd straight length 4, the first cross section 1-1, the second cross section 1-2, the 3rd cross section 1-3, the 4th cross section 1-4, the 5th cross section 1-5, the 6th cross section 1-6, the 7th cross section 1-7.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Figure 1-Figure 4, one is interrupted two-way torsion heat exchange pipe, comprises the first straight tube and second straight tube at distortion section and distortion section two ends, this heat exchanger tube is connected identical with the connected mode of traditional heat exchanger tube and tube sheet with tube sheet.Single heat exchange tube distortion section is made up of some unit, is provided with the 3rd straight tube 4 of one times of twisted tube torque between adjacent two unit, the 3rd straight tube 4 twisted tube torque length are 150mm, each unit comprises left-hand distortion pipeline section, straight length and dextrad distortion pipeline section, described left-hand distortion pipeline section 1, ratio between the length of straight length 2 and dextrad distortion pipeline section 3 is 2:1:2, the length of described the first straight tube and the second straight tube is 150mm, described in this heat exchanger tube left-hand distortion pipeline section 1 and dextrad distortion pipeline section 3 any positions cross section be oval cross section, the ratio of the major and minor axis radius of oval cross section is 1.7:1, described left-hand distortion pipeline section 1 is twice torque length, described dextrad distortion pipeline section 3 is twice torque length, described straight length 2 is one times of torque length, torque length is 120-500 mm.
While adopting the heat exchanger stringing of this heat exchanger tube, the tube pitch of the two-way torsion heat exchange pipe of described each interruption is transverse, in described tube bank, arbitrary cross section transverse supports mutually, in the first cross section 1-1, the second cross section 1-2 that restrain, the 3rd cross section 1-3, the 4th cross section 1-4, the 5th cross section 1-5, the 6th cross section 1-6, the 7th cross section 1-7, the mode that cross section major axis position all adopts triangle to arrange is arranged, in order to realize the effect of self-supporting.
When the processing of left-hand distortion pipeline section described in the utility model and dextrad distortion pipeline section, first pipe is squeezed into ellipse, and carries out rectilinear motion vertically and around the rotatablely moving of axle, and the direction of twist of left-hand twisted tube and dextrad twisted tube is contrary.The size of torque is subject to twisted tube process equipment ability, and the material impact of twisted tube, adopts φ 25 stainless steel tubes in the utility model, and torque is generally between 120mm and 500mm.Torque is too small, and the circumferential shearing force of twisted tube dies down, and torque cannot be delivered to processing stand, occurs excessive distortion plastic deformation, or occur that the torque error of different distortion pipeline sections is excessive in the starting point of torque transmission; If torque is excessive, the flow-disturbing effect of heat exchanger tube convection cell is not obvious, do not reach the effect that higher lifting is conducted heat, the connection that is arranged so that the two-way torsion heat exchange pipe of interruption in the utility model and tube sheet of the first straight tube and the second straight tube is identical with being connected of tube sheet with common heat exchanger tube, without the connected mode that changes heat exchanger.
In the time that fluid flows through heat exchanger tube inside, fluid is subject to carrying out left-handed rotation under the effect of left-hand screw shape runner in the time entering left-hand twisted tube, enter subsequently dextrad twisted tube, fluid can be subject to the effect of right-hand screw shape runner and break the inertia of left-handed rotation, turn to dextrad rotation, the Complex Flows so going round and beginning again, increases considerably heat exchanger tube internal flow level of disruption, strengthens tube side heat-transfer effect.When fluid flows through while forming heat exchanger shell pass by this heat exchanger tube, be subject to centrifugal action periodically-varied flow velocity and flow direction at distortion pipeline section, strengthen longitudinal mixing of fluid.Meanwhile, fluid forms the wake flow that departs from tube wall after the helix contact point of adjacent pipe, increases turbulivity, the heat transfer boundary layer of destruction fluid on tube wall of fluid self, thus augmentation of heat transfer.The point contact at the major axis place of tube bank adjacent tubes is supported mutually, needn't use deflection plate to support, make the arrangement compactness of distorted elliptical pipe in heat exchanger shell, reduce the size of heat exchanger, there will not be the flow dead causing because of deflection plate, can overcome again the induced vibration of heat exchanger tube simultaneously.

Claims (5)

1. one kind is interrupted two-way torsion heat exchange pipe, comprise the first straight tube and second straight tube at distortion section and distortion section two ends, it is characterized in that: distortion section is made up of some unit, between adjacent two unit, be provided with the 3rd straight tube (4), each unit comprises left-hand distortion pipeline section (1), straight length (2) and dextrad distortion pipeline section (3), ratio between the length of described left-hand distortion pipeline section (1), straight length (2) and dextrad distortion pipeline section (3) is 2:1:2, and the cross section of described left-hand distortion pipeline section (1) and dextrad distortion pipeline section (3) is oval cross section.
2. a kind of two-way torsion heat exchange pipe that is interrupted as claimed in claim 1, is characterized in that: the ratio of the major and minor axis radius of described oval cross section is 1.7:1.
3. a kind of two-way torsion heat exchange pipe that is interrupted as claimed in claim 1, it is characterized in that: described left-hand distortion pipeline section (1) is twice torque length, described dextrad distortion pipeline section (3) is twice torque length, described straight length (2) is one times of torque length, and described torque length is 120-500 mm.
4. a kind of two-way torsion heat exchange pipe that is interrupted as claimed in claim 1, is characterized in that: the torque length of described the 3rd straight tube (4) is 120-500 mm.
5. a kind of two-way torsion heat exchange pipe that is interrupted as claimed in claim 1, is characterized in that: the length of described the first straight tube and the second straight tube is 150mm.
CN201420227693.3U 2014-05-05 2014-05-05 Discontinuous and bi-directional warping type heat exchange tube Expired - Lifetime CN203837550U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420227693.3U CN203837550U (en) 2014-05-05 2014-05-05 Discontinuous and bi-directional warping type heat exchange tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420227693.3U CN203837550U (en) 2014-05-05 2014-05-05 Discontinuous and bi-directional warping type heat exchange tube

Publications (1)

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CN203837550U true CN203837550U (en) 2014-09-17

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105526825A (en) * 2016-01-28 2016-04-27 郑州大学 Novel alternately-spiral heat exchange pipe with internal ribs warping
CN105651094A (en) * 2016-03-17 2016-06-08 郑州大学 Novel variable-section alternating spiral twisted heat exchange tube
CN108731513A (en) * 2018-06-22 2018-11-02 郑州大学 A kind of torsion flow tube shell type heat exchanger
CN110431371A (en) * 2017-06-07 2019-11-08 南京工业大学 A kind of tube mixer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105526825A (en) * 2016-01-28 2016-04-27 郑州大学 Novel alternately-spiral heat exchange pipe with internal ribs warping
CN105651094A (en) * 2016-03-17 2016-06-08 郑州大学 Novel variable-section alternating spiral twisted heat exchange tube
CN110431371A (en) * 2017-06-07 2019-11-08 南京工业大学 A kind of tube mixer
CN110431371B (en) * 2017-06-07 2024-05-07 南京工业大学 Tubular mixer
CN108731513A (en) * 2018-06-22 2018-11-02 郑州大学 A kind of torsion flow tube shell type heat exchanger

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Granted publication date: 20140917