Heat exchange threaded pipe

Abstract

The utility model relates to the technical field of threaded pipes, in particular to a heat exchange threaded pipe which comprises a pipe body, a plurality of annularly-distributed spiral protruding rib structures are formed on the inner wall of the pipe body, each protruding rib structure is composed of two tooth-shaped structures, and the two tooth-shaped structures are in transition connection through an arc-shaped face. A plurality of annularly-distributed spiral inwards-concave structures are formed in the corresponding positions of the outer wall of the pipe body. According to the threaded pipe, the convex rib structure is arranged in the threaded pipe and composed of the two tooth-shaped structures, the inner concave structure is formed in the corresponding position of the outer wall of the pipe body, the inner surface area and the outer surface area of the pipe are increased at the same time, and the heat exchange area of the threaded pipe is remarkably increased no matter whether fluid flows through the inner wall of the pipe or the outer wall of the pipe; the turbulent motion is further enhanced, and the fluid is uniformly mixed in the pipe, so that the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded pipes, in particular to a heat exchange threaded pipe. Background Art

[0002] In the field of heat exchange technology, threaded tubes are a key component widely used in equipment such as evaporators and condensers. Their unique structural features, namely the spiral protrusions and grooves formed on the inner surface, significantly increase the heat exchange area compared to traditional smooth tubes and promote turbulent fluid flow, thereby improving heat exchange efficiency to a certain extent. However, with the continuous advancement of industrial technology and the increasing demand for energy conservation and emission reduction, the existing threaded tube structure still has certain limitations in terms of heat exchange efficiency, making it difficult to meet the needs of higher-level applications. Therefore, it is necessary to design a heat exchange threaded tube that can achieve higher heat exchange efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of the above-mentioned background technology, the utility model provides a threaded pipe with high heat exchange efficiency.

[0004] The technical solution of the utility model is: a heat exchange threaded tube, comprising a tube body, the inner wall of the tube body is formed with a plurality of annularly distributed spiral convex rib structures, the convex rib structure is composed of two tooth-like structures, the two tooth-like structures are connected by an arc-shaped transition surface, and the corresponding positions of the outer wall of the tube body are formed with a plurality of annularly distributed spiral concave structures.

[0005] Furthermore, the groove bottom width w1 between two adjacent convex ribs is 0.15-0.3 mm, and the groove bottom width w2 of the concave structure is 0.1-0.35 mm.

[0006] Furthermore, the two tooth-like structures have different tooth heights, wherein the tooth height h1 of one is 0.1 mm to 0.15 mm, and the tooth height h2 of the other is 0.2 to 0.3 mm. The depth H of the concave structure is 0.2 to 0.25 mm.

[0007] Furthermore, the tooth top angle α of the tooth-like structure is 15° to 60°.

[0008] Furthermore, the angle β between the helical line of the convex rib structure and the axis direction of the tube body is 10° to 25°.

[0009] Furthermore, the bottom wall thickness Tw of the threaded tube is 0.2 to 0.35 mm.

[0010] The beneficial effects are as follows: the threaded tube of the present invention is provided with a convex rib structure inside the tube, the convex rib structure is composed of two tooth-like structures, and an inner concave structure is formed at the corresponding position of the outer wall of the tube body. The above structure increases the inner and outer surface areas of the tube at the same time. Regardless of whether the fluid flows through the inner wall or the outer wall of the tube, its heat exchange area is significantly increased. Secondly, through the double tooth structure, the turbulent motion is further enhanced, and the fluid is evenly mixed in the tube, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0012] Figure 2 It is a front view of the utility model.

[0013] Figure 3 It is a partial cross-sectional view of the present utility model.

[0014] Figure 4 This is a schematic diagram of the angle between the helical line of the rib structure and the axis of the tube body of the present invention.

[0015] Figure 5 This is a schematic diagram of the threaded tube of the present invention being used as the inner tube of a shell-and-tube heat exchanger.

[0016] Figure 6 This is a schematic diagram of the threaded tube of the present invention being used as the outer tube of a shell-and-tube heat exchanger. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to specific embodiments. It should be noted that, unless otherwise specified or limited, terms such as "dispose," "install," "connect," and "connect" should be understood in a broad sense. For example, "connect" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; or it may refer to internal communication between two components. A person skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0018] The following describes the preferred technical solution of the present invention in detail with reference to the accompanying drawings. Figure 1The three-dimensional structure diagram of a heat exchange threaded tube is shown. It includes a tube body 1, preferably a copper tube. The bottom wall thickness Tw of the tube body 1 is 0.2-0.35 mm. The inner wall of the tube body 1 is formed with a plurality of annularly distributed spiral ribs 2. When the threaded tube is used in an evaporator, the number of teeth is generally between 50 and 60; when the threaded tube is used in a condenser, the number of teeth is generally between 60 and 70. Furthermore, when the tube diameter is small, the smaller value is used; when the tube diameter is large, the larger value is used. The groove bottom width w1 between two adjacent ribs 2 is 0.15 to 0.3 mm. The groove bottom is preferably wider, which is conducive to heat conduction. It should be noted that the rib 2 structure is composed of two tooth-like structures, which are connected by an arc-shaped transition surface. In a preferred embodiment, the two tooth-like structures have different tooth heights, one of which has a tooth height h1 of 0.1 mm to 0.15 mm, and the other has a tooth height h2 of 0.2 to 0.3 mm. In this embodiment, h1 is 0.15 mm and h2 is 0.3 mm. The tooth shape of the tooth-like structure is triangular, rectangular, trapezoidal or circular. The tooth top angle α of the tooth-like structure is 15° to 60°. In this embodiment, the tooth top angle α is preferably 15°. If a higher value is selected for the tooth height, the corresponding surface heat exchange area will also increase, but the processing technology requirements for the tube body 1 are higher.

[0019] Multiple annularly distributed spiral concave structures are synchronously formed on the outer wall of the tube body 1 at positions corresponding to the ribs 2. The depth H of the concave structures is 0.2 to 0.25 mm, and in this embodiment, H is 0.25 mm. The width w2 of the groove bottom of the concave structures is 0.1 to 0.35 mm. In this embodiment, w2 is preferably 0.35 mm.

[0020] It should be further explained that the angle β between the helical line of the rib 2 and the axis of the tube body 1 is 10° to 25°. When used as a condenser tube, β is 25°, and when used as an evaporator tube, β is 10°.

[0021] refer to Figure 5 and Figure 6 The threaded tube described in the present invention can be used as an inner tube and outer tube 3 of a shell-and-tube heat exchanger, or as an outer tube and inner tube 4 of a shell-and-tube heat exchanger. The specific choice of inside or outside the tube can be based on considerations such as the properties of the fluid. Regardless of which form is selected, the heat exchange area and turbulence effect of the inner and outer walls of the threaded tube are increased compared with the existing technology, and its heat exchange efficiency will be further improved.

[0022] The above-described embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A heat exchange threaded tube, characterized in that: The invention comprises a tube body (1), wherein the inner wall of the tube body (1) is formed with a plurality of annularly distributed spiral convex rib (2) structures, wherein the convex rib (2) structure is composed of two tooth-like structures, and the two tooth-like structures are connected by an arc-shaped transition surface, and the corresponding positions of the outer wall of the tube body (1) are formed with a plurality of annularly distributed spiral concave structures.

2. The heat exchange threaded tube according to claim 1, characterized in that: The groove bottom width w1 between two adjacent convex ribs (2) is 0.15-0.3 mm, and the groove bottom width w2 of the concave structure is 0.1-0.35 mm.

3. The heat exchange threaded tube according to claim 1 or 2, characterized in that: The two tooth-like structures have different tooth heights, wherein the tooth height h1 of one is 0.1 mm to 0.15 mm, and the tooth height h2 of the other is 0.2 mm to 0.3 mm. The depth H of the concave structure is 0.2 mm to 0.25 mm.

4. The heat exchange threaded tube according to claim 1, characterized in that: The tooth top angle α of the tooth-like structure is 15° to 60°.

5. The heat exchange threaded tube according to claim 1, characterized in that: The angle β between the helical line of the convex rib (2) structure and the axial direction of the tube body (1) is 10° to 25°.

6. The heat exchange threaded tube according to claim 1, characterized in that: The bottom wall thickness Tw of the threaded tube is 0.2-0.35 mm.

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