Composite annular inner rib convex cell pipe

Abstract

The utility model relates to the technical field of heat exchanger enhanced heat exchange, and discloses a composite annular inner rib convex cell pipe which comprises an inlet section, a combination section and an outlet section, the inlet section, the combination section and the outlet section are sequentially combined to form a pipe body and are symmetrically arranged in the axial direction, the combination section is formed by sequentially combining annular ribs and a base pipe wall face, and the annular ribs are arranged in the pipe body. A plurality of convex cells are arranged in the wall face of the base tube, the annular ribs are located between the left convex cell and the right convex cell which are adjacent, the cross section of the tube body is a bearing-shaped end face, the convex cells are distributed in the wall face of the base tube in an equiangular mode and form a cavity, and the annular ribs are arranged at equal intervals. Compared with a single insert or a simple fin, the multi-layer design is a structure which is not easy to scale, the durability of the pipe wall is improved, the fluid resistance is reduced, the pressure drop is small, the fluid resistance is small, and a larger heat exchange effect can be achieved compared with a straight pipe; and direct forming can be realized in a mechanical stamping manner.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger heat transfer enhancement technical field especially relates to a kind of compound annular inner rib convex cell tube. BACKGROUND

[0002] Heat exchange equipment is widely used in various industrial fields, especially in chemical industry, petroleum, heating, air conditioning and other industries, mainly for heat transfer to improve the utilization efficiency of energy. In many heat exchange systems, heat exchange is often carried out by flowing through the pipeline by liquid or gas, and these pipelines are the most important components in heat exchange equipment. As the core component of heat transfer, heat exchange tube usually realizes heat transfer through the temperature difference with another fluid. The design of heat exchange tube needs to have high heat exchange efficiency, corrosion resistance and mechanical strength, especially in high temperature and high pressure working environment, the performance of heat exchange tube directly affects the overall operation efficiency and safety of equipment. Therefore, designing efficient and durable heat exchange tube is the key to improving the performance of heat exchange equipment.

[0003] The existing heat exchange tube technology, such as traditional insert or simple finned tube, can improve the heat exchange efficiency to some extent, but has some limitations. Although the traditional fin structure can increase the surface area, it is easy to accumulate dirt, which reduces the heat exchange efficiency, and the design of fin usually causes large fluid resistance and high pressure drop. In addition, the complex processing technology and high manufacturing cost in the manufacturing process also increase the difficulty of production, so a kind of compound annular inner rib convex cell tube is proposed to solve the above problems. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a kind of compound annular inner rib convex cell tube, which aims at improving the problem of poor heat exchange of single heat exchange pipeline in prior art.

[0005] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of compound annular inner rib convex cell tube, including import section, combination section and export section, the import section, combination section and export section are combined into pipe body in turn, and are arranged axially symmetrically, the combination section is combined into by annular rib and base pipe wall surface in turn, the base pipe wall surface is provided with a plurality of convex cells inside, the annular rib is located between adjacent left and right two convex cells, and the cross section of pipe body is bearing shaped end face.

[0007] As a further description of the above technical scheme:

[0008] The convex cell is equiangularly distributed in the base pipe wall surface and forms a cavity.

[0009] As a further description of the above technical scheme:

[0010] The annular ribs are arranged at equal intervals.

[0011] As a further description of the above technical solution:

[0012] The end face sizes of the inlet and outlet sections are the same as those of the combined section, and the length of the inlet section is 2 / 8 of the total length of the pipe body, while the length of the outlet section is 1 / 8 of the total length of the pipe body.

[0013] As a further description of the above technical solution:

[0014] The protrusions are arranged in six equal angles, and the distribution angle between the protrusions is 60°.

[0015] This utility model has the following beneficial effects:

[0016] In this invention, the multi-layered design, compared to a single insert or simple fins, results in a structure that is less prone to scaling, improves the durability of the tube wall, reduces fluid resistance, and has a smaller pressure drop, thus providing a greater heat exchange effect than a straight tube. Moreover, it can be directly formed by mechanical stamping, making the operation process simple and quick, while also being inexpensive to manufacture. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the main view structure of a composite annular inner rib protruding cell tube proposed in this utility model.

[0018] Fig. 2 This is a schematic diagram of the periodic segment structure of a composite annular inner rib convex cell tube proposed in this utility model.

[0019] Fig. 3 This is a schematic diagram of the left-hand view of a composite annular inner rib convex cell tube proposed in this utility model.

[0020] Legend:

[0021] 1. Inlet section; 2. Combined section; 3. Outlet section; 4. Protruding cell; 5. Annular rib; 6. Base pipe wall; 7. Bearing-shaped end face. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figs. 1-3This utility model provides an embodiment of a composite annular inner rib tube, comprising an inlet section 1, a combined section 2, and an outlet section 3. The inlet section 1, combined section 2, and outlet section 3 are sequentially combined to form a tube body and are arranged axially symmetrically. The combined section 2 is composed of annular ribs 5 and a base tube wall 6 sequentially combined. Multiple protrusions 4 are provided inside the base tube wall 6, protruding into the base tube wall 6. The annular ribs 5 are located between two adjacent left and right protrusions 4. The cross-section of the tube body is a bearing-shaped end face 7, which is composed of an outer wall surface, an inner wall surface, protrusions 4 protruding into the cavity, and annular ribs 5. The protrusions 4 are... The ribs are equidistantly distributed within the wall 6 of the base pipe and form a cavity. The annular ribs 5 are arranged at equal intervals, with a rib depth of 1.5 mm and a rib width of 3 mm. The pitch of the rows varies according to the pitch between the two convex cell rings. The position is located in the middle of the two axially arranged convex cell rings. The end face size of the inlet section 1 and the outlet section 3 is the same as the end face size of the combined section 2. The length of the inlet section 1 is 2 / 8 of the total length of the pipe body, and the length of the outlet section 3 is 1 / 8 of the total length of the pipe body. The convex cells 4 are arranged in six equal angles, with a distribution angle of 60° between the convex cells 4. There are 6 convex cells 4, and they are spherical with a depth of 2 mm and a radius of 4 mm.

[0024] Working principle: The fluid medium flows into the combined section 2 with protruding cells 4 from the inlet section 1. The fluid medium exists in two continuous disturbance states in the combined section 2. The annular ribs 5 disturb the fluid, causing the fluid to generate large turbulent kinetic energy. At the same time, under the action of the protruding cells 4, the fluid medium undergoes boundary layer separation, which further increases the turbulence in the cavity. Because the protruding cells 4 and the annular ribs 5 work together, the fluid medium frequently disturbs the boundary layer under the continuous action of the two, effectively improving the heat transfer effect. Finally, the fluid medium flows out from the outlet section 3.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite annular internal ribbed tube, comprising an inlet section (1), a combined section (2), and an outlet section (3), characterized in that: The inlet section (1), the combined section (2) and the outlet section (3) are sequentially combined to form a pipe body and are arranged axially symmetrically. The combined section (2) is composed of annular ribs (5) and the base pipe wall (6) sequentially combined. The base pipe wall (6) has multiple protrusions (4) inside. The annular ribs (5) are located between two adjacent left and right protrusions (4). The cross-section of the pipe body is a bearing-shaped end face (7).

2. The composite annular inner ribbed tube according to claim 1, characterized in that: The protrusions (4) are distributed at equal angles within the base tube wall (6) and form cavities.

3. The composite annular inner ribbed tube according to claim 1, characterized in that: The annular ribs (5) are arranged at equal intervals.

4. The composite annular inner ribbed tube according to claim 1, characterized in that: The end face size of the inlet section (1) and the outlet section (3) is the same as the end face size of the combined section (2), and the length of the inlet section (1) is 2 / 8 of the total length of the pipe body, and the length of the outlet section (3) is 1 / 8 of the total length of the pipe body.

5. A composite annular inner ribbed tube according to claim 1, characterized in that: The protrusions (4) are arranged in six equal angles, and the distribution angle between the protrusions (4) is 60°.

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