A rolled spiral groove stainless steel heat transfer tube
By using heat transfer pipes made of rolled spiral groove stainless steel material, a structure with a spiral inflow part and a slow flow part is designed, which solves the shortcomings of traditional copper light pipe heat transfer pipes in terms of corrosion resistance, impact corrosion resistance, surface strength and hardness, and achieves efficient heat transfer, corrosion resistance and stability improvement.
Patent Information
- Application Number
- CN202421471242.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-26
AI Technical Summary
Traditional copper light pipe heat transfer pipes have shortcomings in their ammonia corrosion resistance, impact corrosion resistance, surface strength and hardness, resulting in reduced pipeline corrosion, deformation, damage and heat transfer efficiency.
The heat transfer pipe made of rolled spiral groove stainless steel material is designed with a spiral inflow part and a slow flow part. The arc-shaped spiral groove part is in concave and convex corrugation or concave and convex fold line shape to increase the relative velocity between the fluid and the pipe wall and the turbulent movement inside the fluid.
It improves heat transfer efficiency, enhances corrosion resistance, surface strength and hardness, reduces flow resistance, avoids local overheating, and extends the service life of the pipeline.
Smart Images
Figure CN222703891U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat transfer tubes, in particular to a rolled spiral groove stainless steel heat transfer tube. Background Art
[0002] The heat transfer tube, as an indispensable core component of the heat exchanger, is cleverly placed inside the cylinder. Its core mission is to serve as a bridge for heat exchange between two different media. Its efficient thermal conductivity and excellent isothermal characteristics ensure the stability and balance of heat during the transmission process, greatly improving the heat exchange efficiency. What is even more striking is that the heat transfer tube has the extraordinary ability to quickly transfer heat energy from one point to another with almost no heat loss, which makes it known as a "heat transfer superconductor" in the field of heat transfer.
[0003] However, traditional heat transfer tubes are usually made of copper tubes with excellent thermal conductivity. This practice not only significantly increases the cost of the product, but also the copper tube itself has a series of problems that are difficult to ignore. For example, copper tubes have poor ammonia corrosion resistance. Long-term contact with corrosive media such as ammonia can easily lead to pipeline corrosion damage. At the same time, copper tubes are also weak in resistance to impact corrosion, especially in environments containing impurities such as mud, high-speed steam or water droplets, they are more susceptible to damage. In addition, the surface strength and hardness of copper tubes are relatively low, and they are easily deformed or damaged under vibration or external force. Moreover, the surface of copper tubes is prone to scaling, which not only affects the heat transfer efficiency, but also increases the difficulty of maintenance and cleaning.
[0004] To this end, the utility model provides a rolled spiral groove stainless steel heat transfer tube. Utility Model Content
[0005] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a rolled spiral groove stainless steel heat transfer tube, which not only has high heat exchange efficiency and low cost, but also has strong corrosion resistance, high surface strength and hardness.
[0006] The purpose of the utility model can be achieved through the following technical solutions:
[0007] A rolled spiral groove stainless steel heat transfer tube, comprising a heat transfer tube body, an inflow portion is arranged at the left end of the heat transfer tube body, an outflow portion is arranged at the right end of the heat transfer tube body, a slow flow portion is arranged in the middle of the heat transfer tube body, and arc-shaped spiral groove portions are arranged on both sides of the slow flow portion;
[0008] The cross-section of the inlet end of the inlet portion is elliptical, the inlet portion is connected to the arc-shaped spiral groove portion on the left side of the slow flow portion, and the cross-section of the connecting end is circular, the inlet end and the connecting end of the inlet portion are spirally connected, and the ratio of the area of the elliptical cross-section of the inlet end of the inlet portion to the area of the circular cross-section of the connecting end of the inlet portion is 0.15:1 to 0.2:1.
[0009] As a further preferred technical solution of the present invention, the cross-section of the outlet end of the outflow portion is elliptical, the outflow portion is connected to the arc-shaped spiral groove portion on the right side of the slow flow portion, and the cross-section of the connecting end is circular, the inlet end and the connecting end of the outflow portion are smoothly connected, and the ratio of the area of the elliptical cross-section of the inlet end of the outflow portion to the area of the circular cross-section of the connecting end of the inflow portion is 0.15:1 to 0.2:1.
[0010] As a further preferred technical solution of the present invention, the arc-shaped spiral groove of the arc-shaped spiral groove portion is in a concave-convex corrugated shape or a concave-convex broken line shape.
[0011] As a further preferred technical solution of the present invention, the helix angle β of the arc-shaped spiral groove is 63-83°.
[0012] As a further preferred technical solution of the utility model, the depth e of the arc-shaped spiral groove is 0.2-0.5 mm, and the arc radius is 1-4 mm.
[0013] As a further preferred technical solution of the utility model, the diameter of the heat transfer tube body is 20-50 mm, and the tube wall thickness is 0.5-1.5 mm.
[0014] As a further preferred technical solution of the present invention, the heat transfer tube body is an integral piece made of stainless steel through a rolling process.
[0015] As a further preferred technical solution of the utility model, the ratio of the area of the elliptical cross section of the inlet end of the inlet portion to the area of the circular cross section of the connecting end of the inlet portion is 0.17:1;
[0016] The ratio of the area of the elliptical cross section at the inlet end of the outflow portion to the area of the circular cross section at the connecting end of the inflow portion is 0.17:1.
[0017] As a further preferred technical solution of the utility model, the helix angle β of the arc-shaped spiral groove is 73°, the depth e is 0.35 mm, and the arc radius is 2.5 mm.
[0018] As a further preferred technical solution of the present invention, the diameter of the heat transfer tube body is 35 mm and the tube wall thickness is 1 mm.
[0019] As described above, the rolled spiral groove stainless steel heat transfer tube provided by the utility model has the following beneficial effects:
[0020] 1. The utility model utilizes the above-mentioned rolled spiral groove stainless steel heat transfer tube. Compared with the prior art, due to the adoption of such a structure, an inflow portion is provided, and the inlet end and the connection end of the inflow portion are spirally connected, so that the relative speed between the fluid and the tube wall is increased, and at the same time, the fluid is caused to rotate and generate disturbances, so that the radial mixing of the fluid is more uniform, thereby improving the heat transfer efficiency.
[0021] 2. The utility model utilizes the above-mentioned rolled spiral groove stainless steel heat transfer tube. Compared with the prior art, due to the adoption of such a structure, a slow flow portion is set to reduce the turbulence of the fluid, reduce the flow resistance, and improve the stability of the fluid, thereby further improving the heat transfer efficiency. In addition, it prevents the fluid from being locally overheated in the pipeline to a certain extent, thereby avoiding damage to the pipeline material due to excessive temperature.
[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0024] Figure 1 This is a schematic diagram of the structure of a rolled spiral groove stainless steel heat transfer tube applied for the utility model;
[0025] Figure 2 This is a front view of a rolled spiral groove stainless steel heat transfer tube applied for by the utility model;
[0026] Figure 3 for Figure 2 Sectional view in the AA direction;
[0027] Figure 4 for Figure 3 The enlarged view of the structure at position Ⅰ in the middle;
[0028] Figure 5 A schematic diagram of a rolled spiral groove stainless steel heat transfer tube of the utility model in which the arc-shaped spiral groove portion is in a concave-convex corrugated shape;
[0029] Figure 6The utility model is a schematic diagram of a rolled spiral groove stainless steel heat transfer tube in which the arcuate spiral groove portion is in a concave-convex broken line shape.
[0030] Summary of reference numerals and their descriptions:
[0031] 100, heat transfer tube body; 110, inflow portion; 120, outflow portion; 130, slow flow portion; 140, arc-shaped spiral groove portion. DETAILED DESCRIPTION
[0032] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed in this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of the implementation of this utility model. The specific structure can be described with reference to the drawings of the patent application.
[0034] The utility model provides a rolled spiral groove stainless steel heat transfer tube, please refer to Figures 1 to 6 As shown, it comprises a heat transfer tube body 100, wherein an inflow portion 110 is provided at the left end of the heat transfer tube body 100, an outflow portion 120 is provided at the right end of the heat transfer tube body 100, a slow flow portion 130 is provided at the middle of the heat transfer tube body 100, and arc-shaped spiral groove portions 140 are provided on both sides of the slow flow portion 130;
[0035] Specifically, the specific structure of the inflow portion 110 is shown below. Figure 1 , Figure 2 as well as Figure 3 As shown, in this embodiment, the cross-section of the inlet end of the inlet portion 110 is elliptical, the inlet portion 110 is connected to the arc-shaped spiral groove portion 140 on the left side of the slow flow portion 130, and the cross-section of the connecting end is circular, the inlet end and the connecting end of the inlet portion 110 are spirally connected, and the ratio of the area of the elliptical cross-section of the inlet end of the inlet portion 110 to the area of the circular cross-section of the connecting end of the inlet portion 110 is 0.17:1.
[0036] It should be noted that a spiral connection is adopted between the inlet end and the connection end of the inlet portion 110. This design is not a simple straight line or smooth transition, but a spiral streamline is cleverly introduced. When the fluid enters this area, it flows along a spiral path, and in this process, the relative speed between the fluid and the tube wall increases significantly. This increase in speed not only strengthens the friction between the fluid and the tube wall, but also promotes turbulent motion inside the fluid. As the fluid flows in the spiral channel, it begins to show a tendency to rotate. This rotation not only makes the movement of the fluid in the tube more complicated, but also brings a significant advantage: the fluid generates strong disturbances during the rotation process. These disturbances effectively break the original laminar state of the fluid, so that the fluid is mixed more evenly in the radial direction. The uniformity of this radial mixing is crucial to improving the heat transfer efficiency. In traditional straight lines or smooth transition flow channels, the fluid often presents a laminar state, resulting in limited heat transfer in the fluid. The design of the spiral inlet portion 110 breaks this limitation by causing the fluid to rotate and generate disturbances, so that heat can be transferred to various parts of the fluid more quickly.
[0037] Specifically, the specific structure of the outflow portion 120 is shown below. Figure 1 , Figure 2 as well as Figure 3 As shown, in this embodiment, the cross-section of the outlet end of the outflow portion 120 is elliptical, the outflow portion 120 is connected to the arc-shaped spiral groove portion 140 on the right side of the slow flow portion 130, and the cross-section of the connecting end is circular, the inlet end and the connecting end of the outflow portion 120 are smoothly connected, and the ratio of the area of the elliptical cross-section of the inlet end of the outflow portion 120 to the area of the circular cross-section of the connecting end of the inflow portion 110 is 0.17:1.
[0038] It should be noted that: unlike the spiral connection between the inlet end and the connecting end of the inlet part 110, a smooth connection is adopted between the inlet end and the connecting end of the outflow part 120, which allows the fluid to flow out of the heat transfer tube body 100 more smoothly, reducing turbulence and eddy currents in the fluid, thereby maintaining the stability of the fluid flow.
[0039] See also Figure 5 and Figure 6 The arc-shaped spiral groove of the arc-shaped spiral groove portion 140 is in a concave-convex corrugated shape or a concave-convex broken line shape. When there is a production equipment with higher precision, the arc-shaped spiral groove of the arc-shaped spiral groove portion 140 is rolled and produced into a concave-convex corrugated shape. In order to reduce the manufacturing difficulty or reduce the manufacturing cost, the arc-shaped spiral groove of the arc-shaped spiral groove portion 140 is rolled and produced into a concave-convex broken line shape.
[0040] Specifically, the specific structure of the arc-shaped spiral groove portion 140 is shown below. Figure 4 As shown, in this embodiment, the helix angle β of the arc-shaped spiral groove of the arc-shaped spiral groove portion 140 is 73°, the depth e of the arc-shaped spiral groove is 0.35 mm, and the arc radius is 2.5 mm.
[0041] The heat transfer tube body 100 has a diameter of 35 mm and a tube wall thickness of 1 mm.
[0042] The heat transfer tube body 100 is an integral piece made of stainless steel through a rolling process. The stainless steel has the advantages of strong corrosion resistance, high surface strength and hardness.
[0043] As described above, the rolled spiral groove stainless steel heat transfer tube provided by the utility model has the following beneficial effects:
[0044] 1. The utility model utilizes the above-mentioned rolled spiral groove stainless steel heat transfer tube. Compared with the prior art, due to the adoption of such a structure, an inlet portion 110 is provided, and the inlet end and the connection end of the inlet portion 110 are spirally connected, so that the relative speed between the fluid and the tube wall is increased, and at the same time, the fluid is caused to rotate and generate disturbances, so that the radial mixing of the fluid is more uniform, thereby improving the heat transfer efficiency.
[0045] 2. The utility model utilizes the above-mentioned rolled spiral groove stainless steel heat transfer tube. Compared with the prior art, due to the adoption of such a structure, a slow flow portion 130 is provided to reduce the turbulence of the fluid, reduce the flow resistance, and improve the stability of the fluid, thereby further improving the heat transfer efficiency. In addition, it prevents the fluid from being locally overheated in the pipeline to a certain extent, thereby avoiding damage to the pipeline material due to excessive temperature.
[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A rolled spiral groove stainless steel heat transfer tube, comprising a heat transfer tube body, characterized in that: The left end of the heat transfer tube body is provided with an inflow portion, the right end of the heat transfer tube body is provided with an outflow portion, the middle part of the heat transfer tube body is provided with a slow flow portion, and arc-shaped spiral groove portions are provided on both sides of the slow flow portion; The cross-section of the inlet end of the inlet portion is elliptical, the inlet portion is connected to the arc-shaped spiral groove portion on the left side of the slow flow portion, and the cross-section of the connecting end is circular, the inlet end and the connecting end of the inlet portion are spirally connected, and the ratio of the area of the elliptical cross-section of the inlet end of the inlet portion to the area of the circular cross-section of the connecting end of the inlet portion is 0.15:1 to 0.2:
1.
2. The rolled spiral groove stainless steel heat transfer tube according to claim 1, characterized in that: The cross-section of the outlet end of the outflow portion is elliptical, the outflow portion is connected to the arc-shaped spiral groove portion on the right side of the slow flow portion, and the cross-section of the connecting end is circular, the inlet end and the connecting end of the outflow portion are smoothly connected, and the ratio of the area of the elliptical cross-section of the inlet end of the outflow portion to the area of the circular cross-section of the connecting end of the inflow portion is 0.15:1 to 0.2:
1.
3. The rolled spiral groove stainless steel heat transfer tube according to claim 1, characterized in that: The arc-shaped spiral groove of the arc-shaped spiral groove portion is in a concave-convex corrugated shape or a concave-convex broken line shape.
4. The rolled spiral groove stainless steel heat transfer tube according to claim 3, characterized in that: The helix angle β of the arc-shaped spiral groove is 63-83°.
5. The rolled spiral groove stainless steel heat transfer tube according to claim 3, characterized in that: The depth e of the arc-shaped spiral groove is 0.2-0.5 mm, and the arc radius is 1-4 mm.
6. The rolled spiral groove stainless steel heat transfer tube according to claim 1, characterized in that: The heat transfer tube body has a diameter of 20 to 50 mm and a tube wall thickness of 0.5 to 1.5 mm.
7. The rolled spiral groove stainless steel heat transfer tube according to claim 1, characterized in that: The heat transfer tube body is an integral piece made of stainless steel through a rolling process.
8. A rolled spiral groove stainless steel heat transfer tube according to claim 1 or 2, characterized in that: The ratio of the area of the elliptical cross section at the inlet end of the inlet portion to the area of the circular cross section at the connecting end of the inlet portion is 0.17:1; The ratio of the area of the elliptical cross section at the inlet end of the outflow portion to the area of the circular cross section at the connecting end of the inflow portion is 0.17:
1.
9. A rolled spiral groove stainless steel heat transfer tube according to claim 4 or 5, characterized in that: The arc-shaped spiral groove has a helix angle β=73°, a depth e=0.35 mm, and an arc radius of 2.5 mm.
10. The rolled spiral groove stainless steel heat transfer tube according to claim 6, characterized in that: The diameter of the heat transfer tube body is 35 mm, and the tube wall thickness is 1 mm.