Hot-rolled integrated double-finned tube and machine tool
By adopting a hot-rolled integrated double fin design in the fin tube, the problem of insufficient heat exchange efficiency of the existing fin tube is solved, and a more efficient heat exchange effect is achieved.
Patent Information
- Application Number
- CN202420071251.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-01-11
AI Technical Summary
The existing fin tubes have shortcomings in heat exchange efficiency, and the different installation methods and arrangements of the fins lead to inconsistent heat exchange efficiency.
A hot-rolled integrated double-fin fin tube is adopted. By installing spiral outer rotating fins and inner rotating fins on the outside and inside of the tube body, and forming them through integrated hot rolling, the fins and the tube body are integrated, with no gaps on the connection surface, and the thermal conductivity efficiency is improved.
A higher heat exchange efficiency is achieved. Through the design of internal and external double fins, the contact area between the medium and the fin tube is increased, which promotes the uniform flow and heat transfer of the medium, and improves the heat exchange efficiency.
Smart Images
Figure CN222733430U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of finned tubes, and in particular to a hot-rolled integrated double-finned tube and a machine tool. Background Art
[0002] Finned tubes are pipes with fins installed on the outside of the tube. After the fins are installed, the heat exchange area of the tube is increased, and the heat exchange efficiency inside and outside the tube is improved. Therefore, finned tubes are widely used in various heat exchange equipment. The heat exchange efficiency of finned tubes is different depending on the installation and arrangement of the fins. Summary of the invention
[0003] In view of the shortcomings of the prior art, the purpose of the present application is to provide a hot-rolled one-piece double-fin finned tube with higher heat exchange efficiency.
[0004] The above application objectives of this application are achieved through the following technical solutions:
[0005] A hot-rolled integrated double-finned tube, comprising:
[0006] A tube body, wherein the tube body is in a round tube shape;
[0007] An external rotating wing, wherein the external rotating wing is spiral-shaped, surrounds the outside of the tube body, and the external rotating wing and the tube body are integrated;
[0008] An inner spiral wing, wherein the inner spiral wing is spiral-shaped, surrounds the inner side of the tube body, and is integrated with the tube body;
[0009] Wherein, the outer spiral wing and the inner spiral wing are both formed by hot rolling as an integral part of the tube body.
[0010] Optionally, the inner rotor wing is a variable pitch helix.
[0011] Optionally, the pitch of the inner rotor wing is greater than that of the outer rotor wing.
[0012] Optionally, there are multiple circular arrays of inner rotor wings.
[0013] Optionally, the height of the inner spiral wing does not exceed twice the wall thickness of the tube body.
[0014] Optionally, the width of the inner spiral wing is not greater than the distance between adjacent inner spiral wings.
[0015] A machine tool is used to manufacture a hot-rolled integrated double-fin finned tube, comprising an inner fin cutter head and an outer fin cutter group, wherein the outer fin cutter group comprises three cutter heads in a circumferential array, the inner fin cutter head is located in the middle of the outer fin cutter group, and the inner fin cutter head is connected to a drive assembly.
[0016] Optionally, the drive assembly includes a drive motor that independently drives the inner wing cutter head.
[0017] In summary, this application at least includes the following beneficial technical effects:
[0018] Through integrated hot rolling forming, the outer and inner fins are formed by heating and rolling the material of the tube body itself, and are integrated with the tube body. There is no gap between the connection surfaces caused by installation, which has better heat conduction efficiency. At the same time, the inner fin is set on the inside of the tube body, so that the fin tube forms inner and outer double fins. On the one hand, the contact area between the medium in the tube body and the fin tube is increased to increase heat dissipation. On the other hand, the inner fin guides the medium to rotate when flowing, making the heat transfer of the medium more uniform and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of the tube body portion of an embodiment of the present application;
[0020] Figure 2 It is a schematic structural diagram of the inner wing cutter head portion of an embodiment of the present application.
[0021] Figure numerals: 1, tube body; 2, outer spiral wing; 3, inner spiral wing; 41, inner wing cutter head; 42, outer wing cutter assembly. DETAILED DESCRIPTION
[0022] The present application is further described in detail below in conjunction with the accompanying drawings.
[0023] See also Figure 1 , is a hot-rolled integrated double-fin fin tube disclosed in an embodiment of the present application, including a tube body 1, the tube body 1 is a circular tube, an outer spiral wing 2 is installed around the outer side of the tube body 1, the outer spiral wing 2 is spiral, and an inner spiral wing 3 is installed around the inner side of the tube body 1, the inner spiral wing 3 and the outer spiral wing 2 are both integrated with the tube body 1, and the outer spiral wing 2 and the inner spiral wing 3 are both hot-rolled integrally with the tube body 1.
[0024] Specifically, through integrated hot rolling forming, the outer spiral fin 2 and the inner spiral fin 3 are formed by heating and rolling the material of the tube body 1 itself, and are integrated with the tube body 1. There is no gap between the connection surfaces caused by installation, which has better heat conduction efficiency. At the same time, the inner spiral fin 3 is arranged on the inner side of the tube body 1, so that the fin tube forms an inner and outer double fin. On the one hand, the contact area between the medium in the tube body 1 and the fin tube is increased to increase heat dissipation. On the other hand, the inner spiral fin 3 guides the medium to flow and generates rotation, so that the heat transfer of the medium is more uniform, and the heat exchange efficiency is improved.
[0025] As a specific implementation of a hot-rolled integrated double-fin fin tube provided in the application, the inner spiral fin 3 is a variable pitch spiral.
[0026] In general, the inner rotating wing 3 generates rotation when guiding the flow of the medium. Through the setting of the variable pitch spiral, the speed of rotation of each section of the guiding medium is different. Through deceleration or acceleration during the flow process, the medium is further evenly mixed, and the heat transfer of the medium is further made more uniform, thereby improving the heat exchange efficiency.
[0027] As another specific implementation of a hot-rolled integrated double-fin fin tube provided in the application, the pitch of the inner spiral fin 3 is greater than that of the outer spiral fin 2.
[0028] In combination with specific usage scenarios, the inner side of the tube body 1 is used for the circulation of heat exchange media, such as water, air, etc., and too dense inner spiral wings 3 may retain the medium between the inner spiral wings 3, causing the medium to be stratified to form a medium with a fast flow rate in the middle and a slow flow rate between the inner spiral wings 3. The medium that may be retained between the inner spiral wings 3 slows down the rate of heat exchange.
[0029] Furthermore, there are multiple inner rotor wings 3 in a circular array.
[0030] It should be understood that setting a larger pitch of the inner rotating wing 3 reduces the gain of increasing the contact area and guiding the rotation of the medium. By increasing the inner rotating wing 3, the gain effect is improved.
[0031] Furthermore, the height of the inner spiral wing 3 is no more than twice the wall thickness of the tube body 1 .
[0032] It should be understood that the inner wing 3 is formed by rolling part of the material in the tube body 1. A larger wing height requires more material, which causes the tube body 1 to be too thin after forming, reducing the service life. At the same time, a larger wing height will squeeze the space for the medium to flow, affecting the flow rate and pressure of the medium.
[0033] Furthermore, the wing width of the inner rotary wing 3 is not greater than the distance between adjacent inner rotary wing 3 .
[0034] It should be understood that by setting a larger spacing between the inner spiral fins 3, the flow of the medium in the tube body 1 is facilitated.
[0035] For easy understanding of hot rolled one-piece double finned tubes, please refer to Figure 2 The present application also discloses a machine tool for manufacturing the fin tube, including an inner fin cutter head 41 and an outer fin cutter group 42. The outer fin cutter group 42 includes three circular array cutter heads. The inner fin cutter head 41 is located in the middle of the outer fin cutter group 42. The inner fin cutter head 41 is connected to a drive assembly.
[0036] In the prior art, the hot-rolled integrated fin tube mainly forms the outer spiral fin 2 on the outer side of the tube body 1 through the outer fin blade group 42. After the tube body 1 is heated, it is extruded by the blade head of the outer fin blade group 42, and part of the material on the outer side of the tube body 1 follows the shape of the blade head to form a spiral fin. The inner fin blade head 41 is installed in the middle of the outer fin blade group 42, so that the tube body 1 is extruded by the outer fin blade group 42 while the inner part is also extruded, so that part of the material forms the inner spiral fin 3 under the extrusion of the inner fin blade head 41.
[0037] In some feasible ways, the outer wing cutter group 42 and other parts are existing technologies and will not be described in detail. The inner wing cutter head 41 is in the shape of a round rod, and a spirally encircled protrusion is fixedly arranged on the outer side of one end of the inner wing cutter head 41, and there are multiple protrusions in a circular array. The other end of the inner wing cutter head 41 can be set to a key hole or a key shaft for connecting a drive assembly, and the drive assembly can transmit power through the drive assembly connected to the outer wing cutter group 42. In order to facilitate the adjustment of the pitch of the inner spiral wing 3, the drive assembly includes a drive motor that independently drives the inner wing cutter head 41, and the inner wing cutter head 41 is driven by an independent drive motor. In order to facilitate the feeding of the tube body 1, one end of the inner wing cutter head 41 with a key hole or a key shaft is connected to a long shaft rod, and the long shaft rod is connected to the drive motor so that the part of the tube body 1 after feeding and forming can be sleeved on the long shaft rod.
[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A hot-rolled integrated double-finned finned tube, characterized in that: include: A tube body (1), wherein the tube body (1) is in the shape of a circular tube; An external rotating wing (2), the external rotating wing (2) is spiral-shaped, the external rotating wing (2) surrounds the outside of the tube body (1), and the external rotating wing (2) and the tube body (1) are integrated; An inner spiral wing (3), the inner spiral wing (3) is spiral-shaped, the inner spiral wing (3) surrounds the inner side of the tube body (1), and the inner spiral wing (3) and the tube body (1) are integrated; Wherein, the outer rotating wing (2) and the inner rotating wing (3) are both formed by hot rolling in one piece with the tube body (1).
2. The hot-rolled integrated double-finned tube according to claim 1, characterized in that: The inner spiral wing (3) is a variable pitch spiral.
3. The hot-rolled integrated double-finned tube according to claim 1, characterized in that: The pitch of the inner rotating wing (3) is greater than that of the outer rotating wing (2).
4. The hot-rolled integrated double-finned tube according to claim 3, characterized in that: The inner rotating wings (3) have a plurality of circular arrays.
5. The hot-rolled integrated double-finned tube according to claim 4, characterized in that: The height of the inner rotating wing (3) does not exceed twice the wall thickness of the tube body (1).
6. The hot-rolled integrated double-finned tube according to claim 5, characterized in that: The wing width of the inner rotating wing (3) is no greater than the spacing between adjacent inner rotating wings (3).
7. A machine tool for manufacturing a hot-rolled integrated double-finned tube according to any one of claims 1 to 6, characterized in that: It comprises an inner wing cutter head (41) and an outer wing cutter group (42), wherein the outer wing cutter group (42) comprises three cutter heads in a circumferential array, the inner wing cutter head (41) is located in the middle of the outer wing cutter group (42), and the inner wing cutter head (41) is connected to a drive assembly.
8. A machine tool according to claim 7, characterized in that: The driving assembly comprises a driving motor which independently drives the inner wing cutter head (41).