CN210741213U - Heat exchange tube with inner ribs twisted in oval shape - Google Patents
Heat exchange tube with inner ribs twisted in oval shape Download PDFInfo
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- CN210741213U CN210741213U CN201920831310.6U CN201920831310U CN210741213U CN 210741213 U CN210741213 U CN 210741213U CN 201920831310 U CN201920831310 U CN 201920831310U CN 210741213 U CN210741213 U CN 210741213U
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Abstract
The utility model provides a novel inner rib oval twisting winding heat exchange tube, which comprises a heat exchange tube body, wherein the tube body is provided with a hollow inner cavity, the inner wall of the tube body is provided with a convex inner rib component, and the outer wall of the tube body is provided with a thread structure with a certain helical angle; the pipe body comprises an inlet section, an inlet transition section, a spiral winding section, an outlet transition section and an outlet section which are connected in sequence; the inlet section and the outlet section are arranged in a straight section, and the spirally wound section part is formed by spirally winding the pipe body into a circular or approximately circular section. The inner rib elliptic twisted winding pipe is formed by processing an inner rib at the inner side of an elliptic straight pipe along the axial direction of the elliptic straight pipe, twisting the straight pipe and then spirally winding the straight pipe along a winding axis; the utility model discloses an oval distortion winding heat exchange tube of inner rib can improve its working medium and at intraductal heat transfer performance that flows, has advantages such as torrent degree height, heat transfer coefficient height, difficult scale deposit, has better development prospect and extensive practical application and worth.
Description
Technical Field
The utility model relates to a reinforce heat transfer technical field, concretely relates to oval distortion winding heat exchange tube of inner rib.
Background
The heat exchanger has wide application in various industries of national economy, is one of the most common devices in energy, petroleum, chemical engineering, metallurgy, power, light industry, food and even aerospace industries, and is an important device for developing secondary energy and realizing heat recovery and energy conservation and dissipation; at present, a shell-and-tube heat exchanger is widely applied due to large flow, small pressure drop loss and high operation pressure; the heat exchange tubes of the shell-and-tube heat exchanger in engineering application all use light tubes, and the turbulent flow effect of working fluid in the light tubes is poor, so that the defects of unobvious heat exchange effect and low heat exchange efficiency are caused; the shell-and-tube heat exchanger generally has a long operation period, impurities and other dirt in fluid are deposited and are easy to block, the efficiency of equipment is influenced, and particularly, the heat exchange pipeline of a large shell-and-tube heat exchanger is blocked, so that the heat exchange effect is influenced, and the operation of the whole process flow is influenced; the spiral wound tube type heat exchanger has the characteristics of large heat transfer area per unit volume, small occupied area, high heat transfer coefficient, small heat transfer temperature difference, high heat transfer efficiency, high pressure resistance, self-compensation of thermal expansion, difficulty in scaling, easiness in realizing large-scale and the like, and also has the function of realizing simultaneous heat transfer of multiple media. The spiral wound tube type heat exchanger is mainly applied to the industries of air separation, liquefied natural gas and the like. In recent years, with the development of large-scale petrochemical, coal chemical and liquefied natural gas devices, spiral wound tube heat exchangers have been used in large quantities due to their advantages of high heat transfer efficiency, compact structure and the like. For example, a hydrogenation reactor of a large oil refining device, a high-pressure material heat exchanger at the rear part of a reforming reactor of a PX device, a methanol washing heat exchanger in a coal-to-methanol device, and a reactor rear heat exchanger in a coal-to-ethylene glycol device all adopt spiral-wound tubular heat exchangers to replace a traditional baffle plate type heat exchanger, a thread locking ring type heat exchanger and a plate shell type heat exchanger, so that the operation of high pressure resistance and zero leakage is realized. The spiral wound tube type heat exchanger has wide market prospect in the industries of petrochemical industry, coal chemical industry and the like. In the common spiral winding pipe, due to the action of centripetal force, secondary flow moving towards the inner side of the winding pipe is generated in the winding pipe, and along with the gradual stabilization of the flow form, the temperature distribution that the temperature of the fluid working medium at the inner side of the winding pipe is low and the temperature of the fluid working medium at the outer side of the winding pipe is high is formed.
SUMMERY OF THE UTILITY MODEL
To the above, the utility model provides a novel oval distortion winding heat exchange tube of inner rib, this intraductal working medium torrent degree is high, heat transfer coefficient is high, difficult scale deposit.
The technical scheme of the utility model is that the heat exchange tube with the oval twisted inner ribs comprises a heat exchange tube body, wherein the tube body is provided with a hollow inner cavity, the inner wall of the tube body is provided with a convex inner rib component, and the outer wall of the tube body is provided with a thread structure with a certain spiral angle; the pipe body comprises an inlet section, an inlet transition section, a spiral winding section, an outlet transition section and an outlet section which are connected in sequence; the inlet section and the outlet section are arranged in a straight section, and the spirally wound section part is formed by spirally winding the pipe body into a circular or approximately circular section.
Wherein, preferably, the spiral angles of the threads on the outer wall of the inlet section pipe body are the same.
Wherein, preferably, the spiral angle of the thread on the outer wall of the outlet section pipe body is the same.
Wherein, preferably, the thread direction of the outer wall of the pipe body is opposite to the winding rotation direction of the pipe body in the spiral winding section part.
Namely, if the spiral winding direction of the thread on the outer wall of the pipe body is clockwise, the twisting rotation direction of the section of the pipe body in the spiral winding section part is anticlockwise; if the spiral winding direction of the thread on the outer wall of the pipe body is anticlockwise, the twisting and rotating direction of the section of the pipe body in the spiral winding section part is clockwise.
Wherein, preferably, the thread pitches of the outer walls of the pipe bodies are equal.
Preferably, the cross section of the tube body of the heat exchange tube wound by the elliptic distortion of the inner rib is elliptic.
Wherein, preferably, the winding direction of the inner rib component is adapted to the thread winding direction of the outer wall.
Has the advantages that:
this oval distortion of inner rib twines heat exchange tube, this novel oval distortion of inner rib twines heat exchange tube outer wall is smooth, and the pipe wall inboard has the inner rib.
The utility model relates to a novel oval distortion of inner rib winding heat exchange tube, this novel oval distortion of inner rib winding heat exchange tube spiral winding deformation's winding angle (the helical angle of outer wall promptly), winding diameter, distortion rotation angle, inner rib height etc. are calculated by operating condition heat load and are confirmed. This novel oval distortion of inner rib twines heat exchange tube, the intraductal working medium torrent degree of working is high, heat transfer coefficient is high, difficult scale deposit.
Drawings
FIG. 1 is a schematic structural view of an inner rib oval twisted winding heat exchange tube;
fig. 2 is a cross-sectional view of a spirally wound section of an internally ribbed oval twist wound heat exchange tube.
FIG. 3 is a schematic cross-sectional structure view of a novel inner rib oval twisted winding heat exchange tube;
in the figure: 1-inlet section, 2-inlet transition section, 3-spiral winding section, 4-outlet transition section, 5-outlet section, 21-outer surface base circle, 22-inner rib component, 23-pipe wall and 24-inner surface base circle.
Detailed Description
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, an inner rib oval twisted winding heat exchange tube comprises a heat exchange tube body, wherein the tube body is provided with a hollow inner cavity, the inner wall of the tube body is provided with a convex inner rib component 22, and the outer wall of the tube body is provided with a thread structure with a certain helical angle; the pipe body comprises an inlet section 1, an inlet transition section 2, a spiral winding section 3, an outlet transition section 4 and an outlet section 5 which are connected in sequence; the inlet section 1 and the outlet section 5 are arranged in a straight section, and the spiral winding section 3 is partially spirally wound to form a circular or approximately circular cross section (see figure 2).
The cross section of the inner rib oval twisted and wound heat exchange tube is oval before being twisted. As shown in fig. 3, includes an outer surface base circle 21, an inner rib assembly 22, a tube wall 23, and an inner surface base circle 24.
The inner rib elliptical twisting and winding pipe is formed by processing an inner rib on the inner side of an elliptical straight pipe along the axial direction of the straight pipe, twisting the straight pipe and then spirally winding along a winding axis. The winding direction of the inner rib component is matched with the winding direction of the outer wall threads. Namely, the inner rib is processed on the inner side of the tube, and the inner rib rotates along the same direction of the cross section twist of the elliptical tube.
The utility model discloses an embodiment specifically as follows: fluid working medium enters the novel inner rib elliptical twisted winding heat exchange tube from the inlet section 1, passes through the inlet transition section 2 and then flows into the spiral winding section 3; the turbulence degree of the fluid in the pipeline is strengthened under the action of the twisted pipe wall, the ribs and the spiral section; finally, the fluid working medium flows out of the novel inner rib elliptical twisting winding heat exchange tube from the outlet transition section 4 and the outlet section 5.
A novel heat exchange tube with an inner rib and an elliptic twisted winding has a technology of strengthening heat transfer inside and outside the tube simultaneously; wherein, three enhanced heat exchange technologies exist in the tube; the first strengthening technique is: because the spiral winding section 3 has a special structure, the centripetal force of fluid on the fluid flowing in the spiral winding pipe is generated by the inner side of the pipe wall of the spiral winding pipe to generate secondary flow vertical to the inner side of the pipe wall, the flowing state of the fluid on the inner side of the winding pipe is strengthened, and the turbulence effect is increased; the second intensified heat exchange technology is as follows: along the flow of the inner rib diversion direction, the inner rib assembly 22 twists and rotates along the spiral winding path, the rotation direction of the inner rib assembly is opposite to the winding direction of the spiral pipe, and the fluid working medium rotates and flows under the diversion effect of the inner rib assembly 22, so that the fluid working medium in the pipe continuously and alternately changes positions, secondary flow tangent to the pipe wall is objectively formed, the damage of a boundary layer is effectively promoted, and the change of the flow form of the fluid working medium in the winding pipe is strengthened. The third intensified heat exchange technology is as follows: due to the periodic rotation transformation of the twisted elliptic pipe wall 23, the fluid working medium flows along the pipe wall and is subjected to the acting force which is vertical to the inner side of the pipe wall and the direction of the acting force is changed all the time, and the generated secondary flow can effectively break the boundary layer, enhance the turbulent flow effect of the flow in the pipe and strengthen the flow heat transfer effect.
In the novel inner rib oval-twisted winding heat exchange tube, a plurality of enhanced heat exchange technologies are superposed, so that a boundary layer and dirt on a fluid wall surface can be effectively damaged, and the heat exchange coefficient is improved; the novel inner rib oval-twisted heat exchange tube has the advantages of high heat transfer efficiency, compact structure, strong bearing capacity and the like, and has better development prospect and wide practical application value.
Claims (7)
1. The utility model provides an oval distortion of inner rib winding heat exchange tube, includes the heat exchange tube body, its characterized in that: the tube body is provided with a hollow inner cavity, the inner wall of the tube body is provided with a convex inner rib component, and the outer wall of the tube body is provided with a thread structure with a certain helical angle; the pipe body comprises an inlet section, an inlet transition section, a spiral winding section, an outlet transition section and an outlet section which are connected in sequence; the inlet section and the outlet section are arranged in a straight section, and the spirally wound section part is formed by spirally winding the pipe body into a circular or approximately circular section.
2. The internally ribbed elliptically twisted heat exchange tube of claim 1, wherein: the spiral angles of the threads on the outer wall of the inlet section pipe body are the same.
3. The internally ribbed elliptically twisted heat exchange tube of claim 1, wherein: the spiral angles of the threads on the outer wall of the outlet section pipe body are the same.
4. The internally ribbed elliptically twisted heat exchange tube of claim 1, wherein: the thread direction of the outer wall of the pipe body is opposite to the winding rotation direction of the pipe body in the spiral winding section part.
5. The internally ribbed elliptically twisted heat exchange tube of claim 1, wherein: the screw pitches of the outer walls of the pipe bodies are equal.
6. The internally ribbed elliptically twisted heat exchange tube of claim 1, wherein: the cross section of the tube body of the inner rib elliptic twisting winding heat exchange tube is elliptic.
7. The internally ribbed elliptically twisted heat exchange tube of claim 1, wherein: the winding direction of the inner rib component is matched with the winding direction of the outer wall threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920831310.6U CN210741213U (en) | 2019-06-04 | 2019-06-04 | Heat exchange tube with inner ribs twisted in oval shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920831310.6U CN210741213U (en) | 2019-06-04 | 2019-06-04 | Heat exchange tube with inner ribs twisted in oval shape |
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| Publication Number | Publication Date |
|---|---|
| CN210741213U true CN210741213U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920831310.6U Active CN210741213U (en) | 2019-06-04 | 2019-06-04 | Heat exchange tube with inner ribs twisted in oval shape |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074153A (en) * | 2020-08-11 | 2022-02-22 | 兰州交通大学 | Manufacturing process for forming inner core with enhanced intra-tube convection heat transfer by winding |
-
2019
- 2019-06-04 CN CN201920831310.6U patent/CN210741213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074153A (en) * | 2020-08-11 | 2022-02-22 | 兰州交通大学 | Manufacturing process for forming inner core with enhanced intra-tube convection heat transfer by winding |
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