A heat exchanger insert structure

Abstract

The utility model provides a kind of heat exchanger inner plug structure, belong to heat exchanger technical field.Solve the prior art using corrugated pipe or inner plug to increase turbulent flow, but for high viscosity liquid, these methods are often ineffective, and even possible due to flow resistance increase and reduce heat exchange efficiency problem.It includes outer layer pipeline, inner layer pipeline and fin assembly, inner layer pipeline is installed in outer layer pipeline, and multiple fin assemblies are evenly distributed between inner layer pipeline and outer layer pipeline, fin assembly includes flat fin and curved fin, the both ends of curved fin are installed with flat fin, the both ends of flat fin are connected with outer layer pipeline inner wall and inner layer pipeline outer wall respectively, the spacing between adjacent flat fin is equal, flat fin extends through welding and is fixed on the inner wall of outer layer pipeline along the axial direction of inner layer pipeline, curved fin is fixed between two flat fin by welding.It is mainly used for the heat exchange of low flow rate high viscosity liquid.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and in particular relates to an internal insert structure for a heat exchanger. Background Technology

[0002] In traditional straight-tube heat exchangers, low-velocity, high-viscosity liquids have extremely low Reynolds numbers, making it difficult to form turbulence, which leads to increased thermal resistance and low heat exchange efficiency. Existing technologies usually use bellows or internal inserts to increase turbulence, but for high-viscosity liquids, these methods are often ineffective and may even reduce heat exchange efficiency due to increased flow resistance. Utility Model Content

[0003] In view of this, the present invention aims to propose an internal insert structure for heat exchangers to solve the problem that the existing technology uses bellows or internal inserts to increase turbulence, but for high-viscosity liquids, these methods are often ineffective and may even reduce heat exchange efficiency due to increased flow resistance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An internal insert structure for a heat exchanger includes an outer pipe, an inner pipe, and fin assemblies. The inner pipe is installed inside the outer pipe, and multiple sets of fin assemblies are evenly distributed between the inner pipe and the outer pipe.

[0005] Furthermore, the fin assembly includes flat fins and curved fins, with flat fins installed at both ends of the curved fins, and the two ends of the flat fins being connected to the inner wall of the outer pipe and the outer wall of the inner pipe, respectively.

[0006] Furthermore, the spacing between adjacent flat fins is equal.

[0007] Furthermore, the flat fins extend axially along the inner pipe and are fixed to the inner wall of the outer pipe by welding, while the curved fins are fixed between the two flat fins by welding.

[0008] Furthermore, the curved fins are designed in a spiral or wavy shape.

[0009] Furthermore, the flat fins and the curved fins are made of thermally conductive metal.

[0010] Furthermore, the bending angle of the bent fins is 30°-90°.

[0011] Furthermore, the outer and inner pipes are made of corrosion-resistant materials.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by guiding the liquid flow trajectory through the fins, the liquid is forced to be divided, rotated, and regrouped and mixed during the flow process, thereby breaking the liquid thermal resistance layer. At the same time, the fins, as heat-conducting parts, increase the heat exchange area and comprehensively improve the heat exchange efficiency. It can also adapt to low-flow-rate, high-dynamic-viscosity, low-Reynolds-number liquid media, such as crude oil, while also taking into account high-Reynolds-number liquids. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the internal insert structure of a heat exchanger according to the present invention; Figure 2 This is a schematic diagram of the liquid flow within the internal insert structure of a heat exchanger according to the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the liquid flow within the internal insert structure of a heat exchanger according to the present invention. Figure 2 ; In the picture: 1-Outer layer pipe, 2-Inner layer pipe, 3-Bent fin, 4-Flat fin. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0015] Detailed Implementation Method 1: See Figure 1-3 This embodiment describes an internal insert structure for a heat exchanger, comprising an outer pipe 1, an inner pipe 2, and fin assemblies. The inner pipe 2 is installed inside the outer pipe 1. Multiple sets of fin assemblies are evenly distributed between the inner pipe 2 and the outer pipe 1. Each fin assembly includes flat fins 4 and curved fins 3. Flat fins 4 are installed at both ends of the curved fins 3. The two ends of the flat fins 4 are respectively connected to the inner wall of the outer pipe 1 and the outer wall of the inner pipe 2. The flat fins 4 extend axially along the inner pipe 2 and are fixed to the inner wall of the outer pipe 1 by welding. The curved fins 3 are fixed between the two flat fins 4 by welding.

[0016] The fin assembly consists of multiple flat fins 4 and multiple curved fins 3. The flat fins 4 extend axially along the inner pipe 2 and are welded and fixed to the inner wall of the outer pipe 1. The curved fins 3 are welded and fixed between adjacent flat fins 4. This structure effectively disrupts the liquid thermal resistance layer structure by guiding the liquid flow trajectory, while increasing the heat exchange area and comprehensively improving the heat exchange efficiency. It can also adapt to low-flow-rate, high-dynamic-viscosity, low-Reynolds-number liquid media, such as crude oil, while also accommodating high-Reynolds-number liquids.

[0017] In this embodiment, the spacing between adjacent flat fins 4 is equal, and the flat fins 4 are evenly distributed along the circumference of the inner pipe 2. The equal spacing between adjacent flat fins 4 ensures the uniformity of liquid flow, avoids the formation of local flow dead zones, and further improves heat exchange efficiency.

[0018] In this embodiment, the curved fins 3 are designed in a spiral or wavy shape. When the liquid flows through, the spiral curved fins 3 force the liquid to rotate, thereby achieving the separation, rotation and remixing of the liquid and effectively destroying the thermal resistance layer structure. In other embodiments, the curved fins 3 can also adopt a wavy structure.

[0019] In this embodiment, the flat fins 4 and the curved fins 3 are made of thermally conductive metal. The flat fins 4 and the curved fins 3 are made of metal materials with good thermal conductivity, such as copper, aluminum or stainless steel. This material selection not only enhances the mechanical strength of the structure, but also significantly improves the thermal conductivity, resulting in better heat exchange.

[0020] In this embodiment, the bending angle of the bent fin 3 is 30°-90°, which optimizes the disturbance effect of the liquid flow trajectory, so as not to cause excessive flow resistance and to ensure good thermal resistance layer destruction effect.

[0021] In this embodiment, the outer pipe 1 and the inner pipe 2 are made of corrosion-resistant materials, making the structure particularly suitable for heat exchange scenarios involving crude oil or other highly corrosive liquid media.

[0022] The specific embodiments of this utility model disclosed above are merely illustrative of the present utility model. These specific embodiments do not exhaustively describe all details, nor do they limit the utility model to only the described embodiments. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A heat exchanger internal insert structure, characterized in that: It includes an outer pipe (1), an inner pipe (2), and fin assemblies. The inner pipe (2) is installed inside the outer pipe (1). Multiple sets of fin assemblies are evenly distributed between the inner pipe (2) and the outer pipe (1). The fin assembly includes flat fins (4) and curved fins (3). Flat fins (4) are installed at both ends of the curved fins (3). The two ends of the flat fins (4) are respectively connected to the inner wall of the outer pipe (1) and the outer wall of the inner pipe (2).

2. The heat exchanger internal insert structure according to claim 1, characterized in that: The spacing between adjacent flat fins (4) is equal.

3. The heat exchanger internal insert structure according to claim 1, characterized in that: The flat fin (4) extends axially along the inner pipe (2) and is fixed to the inner wall of the outer pipe (1) by welding, and the curved fin (3) is fixed between the two flat fins (4) by welding.

4. The heat exchanger internal insert structure according to claim 1, characterized in that: The curved fins (3) are designed in a spiral or wavy shape.

5. The heat exchanger internal insert structure according to claim 1, characterized in that: The flat fins (4) and the curved fins (3) are made of thermally conductive metal.

6. The heat exchanger internal insert structure according to claim 1, characterized in that: The bending angle of the bent fin (3) is 30°-90°.

7. The heat exchanger internal insert structure according to claim 1, characterized in that: The outer pipe (1) and the inner pipe (2) are made of corrosion-resistant materials.

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