A petal-shaped heat exchange enhancement structure and heat exchange tube

Abstract

The present invention discloses a petal-shaped heat exchange enhancement structure and a heat exchange tube, comprising a trunk, the trunk is formed by spirally weaving a double-strand wire, a petal-shaped split wire is arranged on the trunk along the axial direction, each node position of the trunk is provided with a petal-shaped split wire, the double-strand wire is added with the petal-shaped split wire during the spinning process, the double-strand wire and the petal-shaped split wire are woven into one body, two adjacent groups of petal-shaped split wires are staggered, the petal-shaped split wire is hollow and streamlined, the petal-shaped split wire is made of petal-shaped split wires and the transition part is connected by a smooth curve, and the petal-shaped split wire is elastic. The present invention uses the petal-shaped split wire to make the fluid in the central area of ​​the heat exchange tube flow along the petal edge to the tube wall area, reduce the turbulent intensity of the fluid, avoid most of the invalid disturbances, and reduce power consumption; the petal-shaped split wire has its own elasticity, can expand after being inserted into the heat exchange tube and fit closely with the inner tube wall of the heat exchange tube, and no auxiliary installation parts are required; the structure is simple, the processing process is simplified, the processing efficiency is high, it is not easy to accumulate dirt, and it is easy to replace.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange tubes, and in particular relates to a petal-shaped heat exchange enhancement structure and a heat exchange tube. Background Art

[0002] Heat exchange equipment is an indispensable production equipment in typical industries such as machinery manufacturing, energy and chemical industry, transportation, etc. The quality of heat exchange performance has a significant impact on the effective use of energy. In-tube heat exchange enhancement is a method to improve the heat transfer efficiency of heat exchangers.

[0003] Commonly used inserts for tube strengthening include twisted tapes, spaced twisted tapes, staggered twisted tapes, spiral sheets, spiral wires, static mixers, etc. Existing inserts are placed in the heat exchange tube to disturb the fluid, destroy the laminar boundary layer, accelerate the heat exchange between the fluid and the heat transfer tube, and improve the heat exchange effect. However, since the boundary layer is also strengthened, the turbulent intensity of the fluid will be enhanced, thereby sharply increasing the flow resistance of the fluid and increasing energy consumption. In addition, the insert can only be fixed at both ends, and the insert will vibrate violently with the fluid in the heat exchange tube, causing damage to the inner wall of the heat exchange tube. The insert and its fixing structure increase the difficulty of processing, and it is not easy to replace and clean the insert when scale is blocked. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a petal-shaped heat exchange enhancement structure and a heat exchange tube.

[0005] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0006] A petal-shaped heat exchange enhancement structure comprises a trunk, which is spirally woven from a double-strand wire. A plurality of groups of petal-shaped sub-wires are arranged on the trunk along the axial direction. A petal-shaped sub-wire is arranged at each node position of the trunk. The petal-shaped sub-wires are added to the double-strand wire during the spinning process. The double-strand wire and the petal-shaped sub-wire are woven into one. The upper and lower adjacent groups of petal-shaped sub-wires are staggered. The petal-shaped sub-wires are hollow and streamlined. The petal-shaped sub-wires are made of petal-shaped sub-wires and the transitions are connected by smooth curves. The petal-shaped sub-wires are elastic and can expand after being heated.

[0007] Furthermore, the petal-shaped filaments are spiral lines that imitate the shape of petals.

[0008] Furthermore, the main trunk and petal-shaped branch filaments are respectively made of metal materials.

[0009] Furthermore, an ultra-slip anti-fouling layer with a thickness of 1-20 microns is provided on the petal filaments.

[0010] Furthermore, a heat-conducting layer with a thickness of 3-25 microns is arranged between the outer surface of the petal filaments and the ultra-slip anti-fouling layer, and a graphene corrosion-resistant layer with a thickness of 1-15 microns is arranged between the ultra-slip anti-fouling layer and the heat-conducting layer.

[0011] Furthermore, the preparation materials of the ultra-slip anti-fouling layer include the following components in parts by weight:

[0012] 65-130 parts of polydimethylsiloxane

[0013] Silicone oil 20-35 parts

[0014] Coupling agent 5-20 parts

[0015] 4-18 parts of nano zinc oxide.

[0016] Furthermore, the method for preparing the ultra-slip anti-fouling layer comprises the following steps:

[0017] According to the weight percentage, weigh 65-130 parts of polydimethylsiloxane and 5-20 parts of coupling agent, place them in a stirring kettle and mix them evenly, then add 20-35 parts of silicone oil and 4-18 parts of nano zinc oxide, mix well and apply them on the petal filaments, then cure at 115-155℃ for 3-10h to obtain the desired ultra-slip anti-fouling layer.

[0018] The invention discloses a petal-shaped heat exchange tube. The petal-shaped heat exchange tube has a built-in petal-shaped heat exchange strengthening structure, and the inner tube wall of the heat exchange tube is tightly fitted with the petal-shaped filaments.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The petal-shaped filaments can make the fluid in the center area of ​​the heat exchange tube flow along the edge of the petals to the tube wall area, reducing the turbulence intensity of the fluid, avoiding most of the invalid disturbances, and thus reducing power consumption;

[0021] 2) The structure is simple, and the double-stranded wire is added with petal-shaped split wires during the self-spinning, which simplifies the processing process and improves the processing efficiency. Since the petal-shaped split wires have their own elasticity, they can expand and fit with the inner wall of the heat exchange tube after being inserted into the heat exchange tube, especially when the temperature rises, there is a tendency for self-tightening, so there is no need for auxiliary installation parts;

[0022] 3) The petal-shaped filaments have a super-smooth anti-fouling layer, which is not easy to accumulate dirt. The hollow structure of the petal-shaped filaments can separate the dirt in the fluid and prevent scaling. When scaling occurs in the heat exchange tube, the petal-shaped heat exchange enhancement structure can be directly pulled out and reinserted after cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 For the present invention Figure 1 A top view of

[0025] Figure 3 This is a schematic diagram of the structure of the present invention after being installed on a heat exchange tube;

[0026] Figure 4 For the present invention Figure 3 A top view of

[0027] Figure 5 It is a schematic diagram of the structure of the ultra-slip anti-fouling layer, the heat-conducting layer and the graphene corrosion-resistant layer of the present invention. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0030] In the description of the present invention, it should be noted that the terms "top", "bottom", "left", "right", "up", "down", "vertical", "horizontal", "inside" and "outside" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] like Figure 1-5 As shown, a petal-shaped heat exchange enhancement structure includes a trunk 1, which is spirally woven from a double-strand wire. A plurality of groups of petal-shaped sub-wires 2 are arranged on the trunk 1 along the axial direction. During the spinning process of the double-strand wire, petal-shaped sub-wires 2 are added to each node position of the trunk 1. The double-strand wire and the petal-shaped sub-wires 2 are woven into one body. The upper and lower adjacent groups of petal-shaped sub-wires 2 are staggered. The petal-shaped sub-wires 2 are hollow and streamlined. The petal-shaped sub-wires 2 are made of petal sub-wires 2-1 and the transitions are connected by smooth curves. The petal sub-wires 2-1 are elastic and can expand after being heated. After being inserted into the heat exchange tube 3, they can fit against the inner tube wall of the heat exchange tube 3 without generating vibration.

[0032] The petal-shaped filaments 2 are spiral lines imitating the shape of petals and are symmetrically distributed along the axis.

[0033] The main trunk 1 and the petal-shaped branch filaments 2 are respectively made of metal materials.

[0034] An ultra-slip anti-fouling layer 4 with a thickness of 1-20 microns is arranged on the outer surface of the petal filament 2-1, a thermal conductive layer 5 with a thickness of 3-25 microns is arranged between the outer surface of the petal filament 2-1 and the ultra-slip anti-fouling layer 4, and a graphene corrosion-resistant layer 6 with a thickness of 1-15 microns is arranged between the ultra-slip anti-fouling layer 4 and the thermal conductive layer 5.

[0035] The preparation materials of the super-slip anti-fouling layer 4 include the following components in parts by weight:

[0036] 65-130 parts of polydimethylsiloxane

[0037] Silicone oil 20-35 parts

[0038] Coupling agent 5-20 parts

[0039] 4-18 parts of nano zinc oxide.

[0040] The preparation method of the super-slip anti-fouling layer 4 comprises the following steps:

[0041] According to weight, weigh 65-130 parts of polydimethylsiloxane and 5-20 parts of coupling agent, mix them in a stirring kettle, then add 20-35 parts of silicone oil and 4-18 parts of nano zinc oxide, mix well and apply them on the petal filaments 2-1, and then cure them at 115-155°C for 3-10 hours to obtain the desired ultra-slip anti-fouling layer 4.

[0042] The present invention discloses a petal-shaped heat exchange tube with a built-in petal-shaped heat exchange strengthening structure. The inner wall of the heat exchange tube 3 is closely fitted with the petal-shaped branch wire 2. Figure 2 As shown, the circumscribed circle of the petal-shaped heat exchange enhancement structure is the same as the inner diameter of the heat exchange tube 3. Since the petal-shaped branch wires 2 are smooth and elastic, they can be easily inserted into the heat exchange tube 3 by a traction tool. Under their own expansion trend, the petal-shaped branch wires 2 in different directions are tightly attached to the inner tube wall of the heat exchange tube 3, and the friction force is sufficient to prevent the petal-shaped heat exchange enhancement structure from loosening. As the temperature of the material increases, the adhesion will be higher, and the petal-shaped heat exchange enhancement structure will not vibrate in the heat exchange tube 3. When taking out the petal-shaped heat exchange enhancement structure, it only needs to be pulled out along the original insertion direction. The petal-shaped heat exchange enhancement structure remains in its original shape and is not easily deformed.

[0043] Parts not specifically described in the present invention may adopt existing technologies and will not be described in detail here.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A petal-shaped heat exchange enhancement structure, characterized in that: The invention comprises a main trunk which is spirally woven from a double strand of wire. A plurality of groups of petal-shaped filaments are arranged on the main trunk along the axial direction. Petal-shaped filaments are arranged at each node position of the main trunk. Petal-shaped filaments are added to the double strand of wire during the spinning process. The double strand of wire and the petal-shaped filaments are woven into one. The upper and lower adjacent groups of petal-shaped filaments are staggered. The petal-shaped filaments are hollow and streamlined. The petal-shaped filaments are made of petal filaments and the transition parts thereof are connected by smooth curves. The petal filaments are elastic and can expand after being heated.

2. The petal-shaped heat exchange enhancement structure according to claim 1, characterized in that: The petal-shaped filaments are spiral lines that imitate the shape of petals.

3. The petal-shaped heat exchange enhancement structure according to claim 1, characterized in that: The main trunk and petal-shaped branch filaments are respectively made of metal materials.

4. The petal-shaped heat exchange enhancement structure according to claim 1, characterized in that: An ultra-slip anti-fouling layer with a thickness of 1-20 microns is arranged on the petal filaments.

5. The petal-shaped heat exchange enhancement structure according to claim 4, characterized in that: A heat-conducting layer with a thickness of 3-25 microns is arranged between the outer surface of the petal filaments and the super-slip anti-fouling layer, and a graphene corrosion-resistant layer with a thickness of 1-15 microns is arranged between the super-slip anti-fouling layer and the heat-conducting layer.

6. The petal-shaped heat exchange enhancement structure according to claim 4, characterized in that: The preparation materials of the super-slip anti-fouling layer include the following components in parts by weight: 65-130 parts of polydimethylsiloxane Silicone oil 20-35 parts Coupling agent 5-20 parts 4-18 parts of nano zinc oxide.

7. The petal-shaped heat exchange enhancement structure according to claim 6, characterized in that: The preparation method of the ultra-slip anti-fouling layer comprises the following steps: According to the weight percentage, weigh 65-130 parts of polydimethylsiloxane and 5-20 parts of coupling agent, place them in a stirring kettle and mix them evenly, then add 20-35 parts of silicone oil and 4-18 parts of nano zinc oxide, mix well and apply them on the petal filaments, then cure at 115-155℃ for 3-10h to obtain the desired ultra-slip anti-fouling layer.

8. A petal-shaped heat exchange tube, characterized in that: The petal-shaped heat exchange tube is internally provided with a petal-shaped heat exchange enhancement structure as described in any one of claims 1 to 7, and the inner tube wall of the heat exchange tube is tightly fitted with the petal-shaped filaments.

Images