Fin heat exchange tube and processing device
By setting out outer grooves, inner grooves and longitudinal grooves on the outer wall and inner wall of the base tube of the fin heat exchange tube, a fin structure and a raised structure are formed, the problem of poor heat transfer performance of the existing fin heat exchange tube is solved, and a larger heat exchange area and a higher heat exchange coefficient are achieved.
Patent Information
- Application Number
- CN202420479190.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-12
AI Technical Summary
The existing fin heat exchange tubes have thermal resistance problems, poor heat transfer performance, and small heat exchange area, which makes them insufficient disturbance to the boundary layer of the fluid.
A fin heat exchange tube is designed, with an outer groove on the outer wall of the base tube and an inner groove on the inner wall, forming a fin structure and a protruding structure, reducing contact thermal resistance, increasing heat exchange area, and enhancing interference to the boundary layer in the circumferential direction.
The contact thermal resistance between the fin structure and the base tube is effectively reduced, the heat exchange area and heat exchange coefficient are improved, and the disturbance to the fluid boundary layer is enhanced, thereby improving the heat transfer performance.
Smart Images
Figure CN222670801U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy-saving equipment, in particular to a fin heat exchange tube and a processing device. Background Art
[0002] Currently, energy shortages and environmental issues are extremely severe, and energy conservation is a key measure to address them. Heat exchangers are widely used and in large quantities, consuming significant amounts of energy. Finned heat exchange tubes are a key component of heat exchangers, and their heat transfer performance determines their performance. Therefore, research on efficient and energy-saving finned heat exchange tubes is of great significance.
[0003] Finned heat exchange tubes used in industry generally adopt a sleeve and winding structure, but there is contact thermal resistance between the fins and the base tube, resulting in poor performance. In addition, the inner surface of the integral finned tube has a one-dimensional plain tube, but its heat transfer area is small and the disturbance to the fluid boundary layer is poor. It also has a two-dimensional internal threaded surface, but the disturbance to the fluid boundary is small. Utility Model Content
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a finned heat exchange tube with a larger heat exchange area, which can enhance the interference with the boundary layer, increase the heat transfer coefficient, reduce the contact thermal resistance, and improve the heat transfer performance.
[0005] The utility model also provides a processing device with the above-mentioned fin heat exchange tube.
[0006] According to an embodiment of the first aspect of the present invention, a fin heat exchange tube includes a base tube, wherein the outer wall of the base tube is provided with a plurality of outer grooves, the side walls of the outer grooves are fin structures, the inner wall of the base tube is provided with a plurality of inner grooves, the inner wall of the base tube is provided with a plurality of longitudinal grooves, the plurality of longitudinal grooves are parallel to the base tube, and the plurality of longitudinal grooves divide the side walls of the plurality of inner grooves into a plurality of protrusion structures, and the fin structure, all the protrusion structures and the base tube are an integrally formed structure.
[0007] It has at least the following beneficial effects:
[0008] The fin structure, all the protrusion structures and the base tube are an integrally formed structure, which reduces or avoids the contact thermal resistance between the fin structure, all the protrusion structures and the base tube; the arrangement of the fin structure and all the protrusion structures, relative to the base tube with a smooth inner surface, the heat exchange area of the fin heat exchange tube is larger, which is conducive to enhancing heat exchange; relative to the fin heat exchange tube with only an internal thread groove, the fin heat exchange tube of this embodiment not only has the axial turbulence of the internal thread groove, but also enhances the interference with the boundary layer in the circumferential direction, thereby improving and enhancing the heat transfer coefficient on the inner side of the base tube and improving the heat transfer performance.
[0009] According to some embodiments of the present invention, all of the protruding structures are distributed in multiple rows, and the protruding structures in each row are parallel to the axis of the base pipe.
[0010] According to some embodiments of the present invention, the outer groove is a threaded groove.
[0011] According to some embodiments of the present invention, the top surface of the protruding structure is rectangular.
[0012] According to some embodiments of the present invention, the cross section of the inner groove is trapezoidal.
[0013] According to some embodiments of the present invention, the height of the protruding structure is 0.25 mm-0.4 mm.
[0014] According to the second aspect of the present invention, a processing device is provided for processing fin heat exchange tubes, comprising a core rod and three rolling rollers. The core rod is used for sleeve-mounting the base tube. A plurality of straight blades are distributed on the outer wall of one end of the core rod. The straight blades are used for processing the inner grooves on the base tube. A tool is provided at the end of one end of the core rod. The tool is used for processing the longitudinal grooves on the base tube to form a raised structure. The three rolling rollers are all parallel to the core rod. The three rolling rollers are arranged around the core rod. The rolling rollers are used to drive the base tube to move along the axial direction of the base tube and process the outer grooves on the base tube.
[0015] It has at least the following beneficial effects:
[0016] The processing device can quickly process finned heat exchange tubes with high efficiency and easy implementation.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0019] Figure 1 This is a schematic cross-sectional view of a finned heat exchange tube according to an embodiment of the present utility model;
[0020] Figure 2 This is a structural schematic diagram of a processing device for a finned heat exchange tube according to an embodiment of the present utility model;
[0021] Figure 3 for Figure 2 The schematic diagram of the structure of the tool shown;
[0022] Figure Number:
[0023] Base tube 100 , fin structure 110 , protrusion structure 120 , core rod 200 , straight blade 210 , cutter 300 , cutter body 310 , curved blade 320 , notch 330 , first inner wall 331 , second inner wall 332 , roller 400 . DETAILED DESCRIPTION
[0024] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.
[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0026] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.
[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0028] Reference Figure 1 The utility model discloses a fin heat exchange tube, including a base tube 100. The outer wall of the base tube 100 is provided with a plurality of outer grooves, the side walls of the outer grooves are fin structures 110, and the inner wall of the base tube 100 is provided with a plurality of inner grooves. The inner wall of the base tube 100 is provided with a plurality of longitudinal grooves, and the plurality of longitudinal grooves are parallel to the base tube 100. The plurality of longitudinal grooves divide the side walls of the plurality of inner grooves into a plurality of protrusion structures 120. The fin structure 110, all the protrusion structures 120 and the base tube 100 are an integrally formed structure.
[0029] The fin structure 110, all the protrusion structures 120 and the base tube 100 are an integrally formed structure, which reduces or avoids the contact thermal resistance between the fin structure 110, all the protrusion structures 120 and the base tube 100; the arrangement of the fin structure 110 and all the protrusion structures 120, compared with the base tube 100 with a smooth inner surface, the heat exchange area of the fin heat exchange tube is larger, which is conducive to enhancing heat exchange; compared with the fin heat exchange tube with only an internal thread groove, the fin heat exchange tube of this embodiment not only has the axial turbulence of the internal thread groove, but also enhances the interference with the boundary layer in the circumferential direction, thereby improving and enhancing the heat transfer coefficient on the inner side of the base tube 100 and improving the heat transfer performance.
[0030] In some embodiments, all the protruding structures 120 are distributed in multiple rows, and the protruding structures 120 in each row are parallel to the axis of the base pipe 100 .
[0031] In some embodiments, the inner groove is a spiral groove or an annular groove. In this embodiment, the inner groove is an annular groove. There are multiple inner grooves, so that the inner grooves are densely distributed on the inner wall of the base pipe 100. The outer groove is a spiral groove. There are multiple outer grooves, and the intervals between all adjacent outer grooves are equal.
[0032] In some embodiments, the top surface of the protrusion structure 120 is rectangular.
[0033] In some embodiments, the cross section of the inner groove is trapezoidal. Of course, the cross section of the inner groove can also be V-shaped.
[0034] In some embodiments, the height of the protrusion structure 120 is 0.25 mm to 0.4 mm. The height of the protrusion structure 120 should not be too high, otherwise the wall thickness of the fin heat exchange tube will be too small.
[0035] See also Figure 2 and Figure 3 The utility model discloses a processing device for a fin heat exchange tube, which is used to process the above-mentioned fin heat exchange tube, including a core rod 200 and three rollers 400. The core rod 200 is used to be sleeved with a base tube 100. The outer wall of one end of the core rod 200 is provided with a plurality of straight blades 210. The plurality of straight blades 210 are evenly distributed on the outer wall of one end of the core rod 200. The straight blades 210 are parallel to the core rod 200. The straight blades 210 are used to process inner grooves for the base tube 100. A tool 300 is provided at the end head of one end of the core rod 200. The tool 300 is used to process longitudinal grooves for the base tube 100 to form a protruding structure 120. The three rollers 400 are all parallel to the core rod 200. The three rollers 400 are arranged around the core rod 200. The rollers 400 are used to drive the base tube 100 to move along the axial direction of the base tube 100 and process outer grooves for the base tube 100.
[0036] The processing method is as follows: a base pipe 100 is mounted on a rolling mill, and three rollers 400 are synchronously pressed against the outer surface of the base pipe 100. Under the action of the three rollers 400, the base pipe 100 simultaneously performs a spiral motion of circumferential rotation and axial movement. The straight blade 210 squeezes the inner surface of the base pipe 100, thereby forming an inner groove. A cutter 300 is mounted on a core rod 200. As the base pipe 100 moves axially, the sidewalls of the inner groove are plowed and cut by the cutter 300, forming a protrusion structure 120.
[0037] The finned heat exchange tube processing device is used to process the finned heat exchange tube at one time, which has high efficiency, low production cost and is easy to implement.
[0038] See also Figure 3 In some embodiments, the cutter 300 includes an annular cutter body 310 and two curved blades 320 disposed on the outer wall of the cutter body 310. The cutting edges of the curved blades 320 gradually increase in thickness along the circumference of the curved blades 320. A notch 330 is disposed between the two curved blades 320. The notch 330 prevents the inner groove sidewall from being completely plowed, and the remaining structure on the inner groove sidewall becomes the protrusion 120.
[0039] It can be understood that a columnar mounting portion is provided at one end of the core rod 200, the mounting portion and the core rod 200 are coaxially arranged, the knife body 310 is sleeved on the mounting portion, the mounting portion is provided with a threaded structure, and the nut cooperates with the threaded structure to lock the knife body 310 on the core rod 200.
[0040] In some embodiments, the notch 330 includes a first inner wall 331 and a second inner wall 332 at an angle, the first inner wall 331 and the central axis of the blade 310 are in the same plane, and the second inner wall 332 and a tangent line of the blade 310 are parallel to each other.
[0041] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0042] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A finned heat exchange tube, characterized in that: include: Base pipe; A plurality of outer grooves are provided on the outer wall of the base tube, and the side walls of the outer grooves are fin structures; A plurality of inner grooves are formed on the inner wall of the base tube. A plurality of longitudinal grooves are formed on the inner wall of the base tube. The plurality of longitudinal grooves are parallel to the base tube. The plurality of longitudinal grooves divide the side walls of the plurality of inner grooves into a plurality of protrusion structures. The fin structure, all the protrusion structures and the base tube are an integrally formed structure.
2. The finned heat exchange tube according to claim 1, characterized in that: All the protruding structures are distributed in multiple rows, and the protruding structures in each row are parallel to the axis of the base tube.
3. The finned heat exchange tube according to claim 1, characterized in that: The outer groove is a thread groove.
4. The finned heat exchange tube according to claim 1, characterized in that: The top surface of the protruding structure is rectangular.
5. The finned heat exchange tube according to claim 1, characterized in that: The cross section of the inner groove is trapezoidal.
6. The finned heat exchange tube according to claim 1, characterized in that: The height of the protruding structure is 0.25 mm-0.4 mm.
7. A processing device for a finned heat exchange tube, characterized in that: A fin heat exchange tube for processing any one of claims 1 to 6, comprising: A core rod is used for sleeve installation of the base pipe, a plurality of straight blades are distributed on the outer wall of one end of the core rod, the straight blades are used to process the inner groove of the base pipe, and a tool is provided at the end of one end of the core rod, the tool is used to process the longitudinal groove of the base pipe to form a convex structure; Three rollers are parallel to the core rod, and the three rollers are arranged around the core rod. The rollers are used to drive the base pipe to move along the axial direction of the base pipe and process the outer groove on the base pipe.
8. The processing device for a finned heat exchange tube according to claim 7, characterized in that: The tool comprises an annular blade body and two arc-shaped blades arranged on the outer wall of the blade body. The thickness of the cutting edge of the arc-shaped blade gradually increases along the circumference of the arc-shaped blade. A notch is arranged between the two arc-shaped blades.
9. The processing device for a finned heat exchange tube according to claim 8, characterized in that: The notch includes a first inner wall and a second inner wall which are at an angle, wherein the first inner wall and the central axis of the knife body are in the same plane, and the second inner wall and a tangent line of the knife body are parallel to each other.