Heat exchange tube and heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and discloses a heat exchange tube and a heat exchanger, the heat exchange tube comprises a tube body and a spoiler formed by twisting a strip-shaped component, the spoiler is arranged in the tube body, the strip-shaped component is provided with a central axis and a twisting axis, and the twisting axis and the central axis are arranged at an interval; the first spiral line is close to the torsion axis, the second spiral line is far away from the torsion axis, the first spiral line and the inner wall of the pipe body are arranged in a spaced mode, the second spiral line abuts against the inner wall of the pipe body, and therefore the contact area between the spoiler and the pipe body is reduced, and when the spoiler is inserted into the pipe body, the contact area between the spoiler and the pipe body is reduced. The friction force between the spoiler and the inner wall of the tube body is reduced, so that the installation difficulty of the spoiler is reduced, the production difficulty of the heat exchange tube is reduced, and the production efficiency of the heat exchange tube is improved.

Description

Technical Field

[0001] This application belongs to the technical field of heat exchangers, specifically relating to a heat exchange tube and a heat exchanger. Background Technology

[0002] A heat exchanger is an energy-saving device that enables heat transfer between two or more fluids at different temperatures. It can transfer heat from a higher-temperature fluid to a lower-temperature fluid, allowing the fluid temperature to reach the specified parameters of the process and meet the requirements of the process conditions.

[0003] Heat exchange tubes are an important component of heat exchangers. To improve the heat transfer performance of heat exchange tubes, it is easy to think of installing turbulence-inducing elements in the heat exchange tubes. This allows the medium in the heat exchange tubes to change its flow pattern under the action of the turbulence-inducing elements, thereby enhancing the turbulence of the medium. This, to a certain extent, interferes with and disrupts the development of the medium boundary layer and weakens the heat transfer resistance, thus improving the heat transfer performance of the heat exchange tubes.

[0004] However, in order to achieve the development of the turbulence disrupting the medium boundary layer, the side of the turbulence needs to be set to abut against the inner wall of the heat exchange tube. This increases the friction when inserting the turbulence into the heat exchange tube, thereby increasing the difficulty of inserting the turbulence into the heat exchange tube and affecting the production efficiency of the heat exchanger. Utility Model Content

[0005] This application provides a heat exchange tube that reduces the manufacturing difficulty of the heat exchange tube, thereby improving the production efficiency of the heat exchanger.

[0006] The technical solution adopted in this application is as follows:

[0007] A heat exchange tube includes a tube body and a flow-dispersing element formed by twisting a strip member. The flow-dispersing element is disposed inside the tube body, and the strip member has a central axis and a twisting axis. The twisting axis is spaced apart from the central axis, so that the flow-dispersing element has a first spiral line closer to the twisting axis and a second spiral line farther from the twisting axis. The first spiral line is spaced apart from the inner wall of the tube body, and the second spiral line abuts against the inner wall of the tube body.

[0008] By adopting the above technical solution, since the torsion axis and the central axis of this application are spaced apart, the turbulence element is formed by eccentrically twisting a strip member, so that the turbulence element has a first spiral line closer to the torsion axis and a second spiral line farther from the torsion axis. The first spiral line is spaced apart from the inner wall of the tube body, and the second spiral line abuts against the inner wall of the tube body, thereby reducing the contact area between the turbulence element and the tube body. This reduces the friction between the turbulence element and the inner wall of the tube body when the turbulence element is inserted into the tube body, thereby reducing the thrust required to insert the turbulence element into the tube body, reducing the installation difficulty of the turbulence element, reducing the production difficulty of the heat exchange tube, and improving the production efficiency of the heat exchange tube installed in this application.

[0009] Furthermore, since the first spiral line is spaced apart from the inner wall of the tube, the medium flowing to the first spiral line can continue to flow along the axial direction of the tube and impact the medium flowing along the spiral direction of the turbulence element, thereby further disrupting the development of the medium boundary layer and further improving the turbulence effect of the medium, thereby further improving the heat transfer performance of the heat exchange tube, and thus improving the heat transfer performance of the heat exchanger with the heat exchange tube of this application installed.

[0010] Optionally, the strip member is a strip-shaped plate structure.

[0011] By adopting the above technical solution, since the strip component in this application is a strip plate structure, the molding difficulty of the turbulence-causing component is reduced, thereby improving the production efficiency of the turbulence-causing component and reducing the production cost of the heat exchange tube.

[0012] Optionally, the strip member includes a first plate and a second plate arranged at an angle to the first plate, and the central axis is located at the intersection of the first plate and the second plate.

[0013] By adopting the above technical solution, since the strip component includes a first plate and a second plate arranged at an angle to the first plate, the number of spiral channels inside the tube is increased, which further disrupts the development of the medium boundary layer and further improves the turbulence effect of the medium, thereby further improving the heat transfer performance of the heat exchange tube, and further improving the heat transfer performance of the heat exchanger with the heat exchange tube of this application installed.

[0014] Optionally, the pipe body includes a flow passage section and a reduced diameter section, wherein the inner diameter of the reduced diameter section is smaller than the inner diameter of the flow passage section, so that the inner wall of the reduced diameter section abuts against the flow disruptor to compress and fix the flow disruptor.

[0015] By adopting the above technical solution, when manufacturing the heat exchange tube of this application, the flow-damping element is first inserted into the tube body, and then the tube body is reduced in diameter to form a reduced-diameter section on the tube body. The inner wall of the reduced-diameter section is pressed against the flow-damping element to fix the flow-damping element. This avoids the phenomenon that the flow-damping element vibrates and impacts the inner wall of the tube body when the medium flows in the tube body, thereby reducing the noise of the heat exchanger with the heat exchange tube of this application installed, providing a more comfortable working environment for the staff, and improving the user experience.

[0016] Furthermore, by reducing the diameter of the tube body, the turbulence-inducing component is fixed, preventing it from rotating relative to the tube body under the influence of the medium flow. This avoids friction between the turbulence-inducing component and the tube body, reducing wear on the heat exchange tube and extending its service life. This, in turn, extends the service life of the heat exchanger equipped with the heat exchange tube of this application, further improving the user experience. Simultaneously, the reduction in tube diameter also reduces the difficulty of fixing the turbulence-inducing component, thereby improving the production efficiency of the heat exchange tube and increasing the stability of the turbulence-inducing component.

[0017] Optionally, the reduced diameter section is located at the end of the tube body.

[0018] By adopting the above technical solution, since the reduced diameter section is located at the end of the tube body, the forming difficulty of the reduced diameter section is reduced, thereby improving the production efficiency of the heat exchange tube, and thus improving the production efficiency of the heat exchanger installed with the heat exchange tube of this application and reducing the production cost of the heat exchanger.

[0019] Optionally, the reduced diameter section is provided in at least two sections, wherein the two reduced diameter sections are respectively located at two ends of the pipe body, and the flow passage section is located between the multiple reduced diameter sections.

[0020] By adopting the above technical solution, since the reduced diameter section is set with at least two sections, the number of fixed points for the turbulence-inducing component is increased, thereby increasing the stability of the turbulence-inducing component. This further avoids the phenomenon that the turbulence-inducing component can rotate relative to the tube body, which would cause wear of the heat exchange tube, and thus further ensures the service life of the heat exchange tube.

[0021] Optionally, the flow passage section is provided with at least two sections, and the narrowing section is located between the multiple flow passage sections.

[0022] By adopting the above technical solution, since the flow passage is set in two sections and the reduced diameter section is located between the multiple flow passage sections, when the heat exchange tube in this application is connected to the tube sheet, the flow passage is connected to the tube sheet, so that the heat exchange tube can be fixedly connected to the tube sheet by expansion or welding, thereby improving the flexibility of the connection method between the heat exchange tube and the tube sheet; at the same time, it can also ensure the flow area at the end of the tube body, so that more medium can enter the interior of the tube body through the tube body opening, thereby ensuring the heat transfer performance of the heat exchange tube.

[0023] Optionally, the reduced diameter section has an outer end located close to the tube sheet, and the tube sheet has an inner side facing the middle position in the length direction of the heat exchanger. The distance L between the outer end and the inner side satisfies: L≥0.1mm.

[0024] By adopting the above technical solution, since L≥0.1mm, the reduced diameter section can avoid the tube sheet, thereby ensuring the connection area between the tube body and the tube sheet, increasing the connection stability between the heat exchange tube and the tube sheet, and thus increasing the service life of the heat exchanger with the heat exchange tube in this application.

[0025] Optionally, the length of the spoiler is less than the length of the pipe body, so that a clearance space is formed between the end of the spoiler and the end of the pipe body;

[0026] And / or, the spoiler has a straight section and a torsion section, the straight section being located at the end of the torsion section.

[0027] By adopting the above technical solution, since the length of the baffle is less than the length of the tube body, the end of the baffle can avoid the end of the tube body, so that the two ends can form an avoidance space, so that the tube body can be fixedly connected to the tube sheet by expansion joint, thereby reducing the difficulty of fixing the tube body by expansion joint and improving the assembly efficiency of the heat exchanger.

[0028] Because the turbulence-disrupting component has a straight section and a torsion section, with the straight section located at the end of the torsion section, the end of the strip component does not need to be torsion-treated, thereby reducing the production difficulty of the turbulence-disrupting component and improving the production efficiency of the turbulence-disrupting heat exchanger.

[0029] This application also discloses a heat exchanger to reduce the manufacturing difficulty of heat exchangers and improve the production efficiency of heat exchangers.

[0030] A heat exchanger includes a cylindrical body, a tube box disposed at the end of the cylindrical body, a tube sheet disposed between the cylindrical body and the tube box, and heat exchange tubes as described above, wherein the heat exchange tubes are located inside the cylindrical body and the ends of the heat exchange tubes are welded or expanded to the tube sheet.

[0031] By adopting the above technical solution, since the heat exchanger in this application uses the aforementioned flow-around heat exchange tube, the production difficulty of the heat exchange tube is reduced and the production efficiency of the heat exchange tube is improved, thereby reducing the production difficulty of the heat exchanger and improving the production efficiency of the heat exchanger.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] 1. The heat exchange tube of this application includes a tube body and a flow-dispersing element formed by twisting a strip member. The flow-dispersing element is disposed inside the tube body, and the strip member has a central axis and a torsion axis. The torsion axis and the central axis are spaced apart, so that the flow-dispersing element has a first spiral line closer to the torsion axis and a second spiral line farther from the torsion axis. The first spiral line is spaced apart from the inner wall of the tube body, and the second spiral line abuts against the inner wall of the tube body, thereby reducing the contact area between the flow-dispersing element and the tube body. This reduces the frictional force between the flow-dispersing element and the inner wall of the tube body when the flow-dispersing element is inserted into the tube body, thereby reducing the thrust required to insert the flow-dispersing element into the tube body, reducing the installation difficulty of the flow-dispersing element, reducing the production difficulty of the heat exchange tube, and improving the production efficiency of the heat exchange tube installed in this application.

[0034] 2. The tube body in this application includes a flow passage section and a reduced diameter section. The inner diameter of the reduced diameter section is smaller than that of the flow passage section, so that the inner wall of the reduced diameter section presses against the turbulence-inducing element to compress and fix the turbulence-inducing element, thereby fixing the turbulence-inducing element and preventing the turbulence-inducing element from rotating relative to the tube body under the action of the medium flow. This avoids the phenomenon of mutual friction between the turbulence-inducing element and the tube body, thereby reducing the wear of the heat exchange tube and extending the service life of the tube body. This extends the service life of the heat exchanger with the heat exchange tube of this application, further improving the user experience. At the same time, the reduction of the tube body diameter achieves the fixing of the turbulence-inducing element, thereby reducing the difficulty of fixing the turbulence-inducing element, thereby improving the production efficiency of the heat exchange tube and increasing the stability of the turbulence-inducing element.

[0035] 3. The reduced diameter section in this application is located at the end of the tube body, which reduces the difficulty of forming the reduced diameter section, thereby improving the production efficiency of the heat exchange tube, and further improving the production efficiency of the heat exchanger installed with the heat exchange tube in this application and reducing the production cost of the heat exchanger. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0037] Figure 1 This is a cross-sectional view of the heat exchange tube described in this application;

[0038] Figure 2 This is a schematic diagram of the structure of the tube body described in this application;

[0039] Figure 3 This is a schematic diagram of the structure of the aerodynamic device described in Embodiment 1 of this application;

[0040] Figure 4 This is a schematic diagram showing the positional relationship between the torsion axis and the central axis in Embodiment 1 of this application, where A represents the torsion axis and O represents the central axis;

[0041] Figure 5 This is a schematic diagram illustrating another positional relationship between the torsion axis and the central axis described in Embodiment 1 of this application, where A represents the torsion axis and O represents the central axis.

[0042] Figure 6 This is a schematic diagram of the structure of the turbulence-disrupting component described in Embodiment 2 of this application;

[0043] Figure 7 This is a schematic diagram showing the positional relationship between the torsion axis and the central axis in Embodiment 2 of this application, where A represents the torsion axis and O represents the central axis;

[0044] Figure 8 This is a schematic diagram illustrating another positional relationship between the torsion axis and the central axis in Embodiment 2 of this application, where A represents the torsion axis and O represents the central axis;

[0045] Figure 9 This is a partial structural schematic diagram of the heat exchanger described in this application.

[0046] Figure label:

[0047] 1. Tube body; 11. Flow passage; 12. Reduction section; 2. Turbulence element; 21. Strip component; 3. Tube sheet. Detailed Implementation

[0048] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0049] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0050] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0053] Reference Figures 1 to 8 A heat exchange tube is disclosed, comprising a tube body 1 and a flow-disrupting element 2 formed by twisting a strip member 21. The flow-disrupting element 2 is disposed inside the tube body 1, and the strip member 21 has a central axis and a torsion axis. The torsion axis and the central axis are spaced apart, so that the flow-disrupting element 2 has a first spiral line closer to the torsion axis and a second spiral line farther from the torsion axis. The first spiral line is spaced apart from the inner wall of the tube body 1, and the second spiral line abuts against the inner wall of the tube body 1.

[0054] It should be noted that the "first spiral line closer to the axis of torsion and the second spiral line farther from the axis of torsion" mentioned above refers to the comparison between the first spiral line and the second spiral line. In other words, the distance from the first spiral line to the axis of torsion is less than the distance from the second spiral line to the axis of torsion.

[0055] The aforementioned spacing between the torsion axis and the central axis can be understood as the spoiler 2 being formed by the eccentric torsion of the strip member 21; while the torsion axis refers to the axis of the spoiler 2 formed by the torsion of the strip member 21 around it.

[0056] Because the torsion axis and the central axis are spaced apart in this application, the turbulence-disrupting element 2 is formed by eccentrically twisting the strip member 21, so that the turbulence-disrupting element 2 has a first spiral line closer to the torsion axis and a second spiral line farther from the torsion axis. The first spiral line is spaced apart from the inner wall of the tube body 1, and the second spiral line abuts against the inner wall of the tube body 1, thereby reducing the contact area between the turbulence-disrupting element 2 and the tube body 1, so as to reduce the friction between the turbulence-disrupting element 2 and the inner wall of the tube body 1 when the turbulence-disrupting element 2 is inserted into the tube body 1, thereby reducing the thrust required to insert the turbulence-disrupting element 2 into the tube body 1, thereby reducing the installation difficulty of the turbulence-disrupting element 2, reducing the production difficulty of the heat exchange tube, and improving the production efficiency of the heat exchange tube installed in this application.

[0057] Furthermore, since the first spiral line is spaced apart from the inner wall of the tube body 1, the medium flowing to the first spiral line can continue to flow along the axial direction of the tube body 1 and can impact the medium flowing along the spiral direction of the turbulence member 2, thereby further disrupting the development of the medium boundary layer and further improving the turbulence effect of the medium, thereby further improving the heat transfer performance of the heat exchange tube, and thus improving the heat transfer performance of the heat exchanger with the heat exchange tube of this application installed.

[0058] Preferably, the torsion axis and the central axis are set parallel and spaced apart to reduce the production difficulty of the turbulence-disrupting component 2 and improve the production efficiency of the heat exchange tube.

[0059] This application does not specifically limit the structure of the strip member 21, which can adopt any of the following embodiments:

[0060] Implementation Method 1, in this implementation method, refer to Figure 3 , Figure 4 and Figure 5 The strip component 21 is a strip plate-like structure.

[0061] It is understandable that the central axis is a reference line passing through the middle position of the strip-shaped structure in the width direction.

[0062] Since the strip member 21 in this application is a strip plate structure, the molding difficulty of the turbulence member 2 is reduced, thereby improving the production efficiency of the turbulence member 2 and reducing the production cost of the heat exchange tube.

[0063] In this embodiment, the relationship between the torsion axis and the strip-shaped structure is not specifically limited; it can be as follows: Figure 4 The torsion axis shown is located on the plate-like structure, and it can also be as follows: Figure 5 The torsion axis shown is located outside the plate-like structure.

[0064] Implementation Method Two: In this implementation method, refer to... Figure 6 , Figure 7 and Figure 8 The strip member 21 includes a first plate and a second plate that is angled to the first plate, with the central axis located at the intersection of the first plate and the second plate.

[0065] It is understandable that the first plate and the second plate are fixedly connected and together form a V-shaped structure with a cross section perpendicular to the length direction. That is, the two can together form an angle steel with an included angle of 90°, or it can be a structure with an included angle of other degrees, such as 30°, 45°, 60°, etc. The first plate and the second plate form an outer angle and an inner angle at the connection point, and the central axis refers to the line passing through the midpoint of the line connecting the outer angle and the inner angle.

[0066] Since the strip member 21 includes a first plate and a second plate arranged at an angle to the first plate, the number of spiral channels inside the tube 1 is increased, which further disrupts the development of the medium boundary layer and further improves the turbulence effect of the medium, thereby further improving the heat transfer performance of the heat exchange tube, and further improving the heat transfer performance of the heat exchanger with the heat exchange tube of this application installed.

[0067] In this embodiment, the relationship between the torsion axis and the V-shaped structure is not specifically limited; it can be as follows: Figure 7 The torsion axis shown is located on the V-shaped structure, and it can also be as follows: Figure 8 The torsion axis shown is located inside the V-shaped structure.

[0068] Of course, in other embodiments, the spoiler 2 can also be formed by twisting a structure with a cross-section of other shapes, such as W-shaped, C-shaped, etc.

[0069] This application does not specify the fixing method of the spoiler 2; preferably, refer to... Figure 1 and Figure 2 The pipe body 1 includes a flow passage section 11 and a narrowing section 12. The inner diameter of the narrowing section 12 is smaller than the inner diameter of the flow passage section 11, so that the inner wall of the narrowing section 12 presses against the flow-deflecting member 2 to compress and fix the flow-deflecting member 2.

[0070] When manufacturing the heat exchange tube of this application, the flow-reducing element 2 is first inserted into the tube body 1, and then the tube body 1 is reduced in diameter to form a reduced-diameter section 12 on the tube body 1. The inner wall of the reduced-diameter section 12 is pressed against the flow-reducing element 2 to fix the flow-reducing element 2. This avoids the phenomenon that the flow-reducing element 2 vibrates and impacts the inner wall of the tube body 1 when the medium flows in the tube body 1, thereby reducing the noise of the heat exchanger with the heat exchange tube of this application installed, providing a more comfortable working environment for the staff, and improving the user experience.

[0071] Furthermore, by reducing the diameter of the tube body 1, the flow-damping element 2 is fixed, thus preventing the flow-damping element 2 from rotating relative to the tube body 1 under the influence of the medium flow. This avoids the phenomenon of mutual friction between the flow-damping element 2 and the tube body 1, thereby reducing the wear of the heat exchange tube and extending the service life of the tube body 1. This, in turn, extends the service life of the heat exchanger equipped with the heat exchange tube of this application, further improving the user experience. At the same time, by reducing the diameter of the tube body 1, the flow-damping element 2 is fixed, thereby reducing the difficulty of fixing the flow-damping element 2, which in turn improves the production efficiency of the heat exchange tube and increases the stability of the flow-damping element 2.

[0072] This application does not specifically limit the shape of the reduced diameter section 12. Preferably, the reduced diameter section 12 is a straight section with a constant diameter to reduce the manufacturing difficulty of the heat exchange tube. In other embodiments, the radial cross-section of the reduced diameter section 12 can also be V-shaped or W-shaped, that is, the diameter of the reduced diameter section 12 gradually decreases and then gradually increases along the axial direction of the tube body 1 to improve the fixing effect on the turbulence-inducing element 2.

[0073] This application does not specify the formation method of the reduced diameter section 12. It can be formed by a tube shrinking machine to reduce the production difficulty of the heat exchange tube. It can also be formed by other equipment, as long as it can reduce the diameter of a part of the tube body 1 and press it against the turbulence-disrupting element 2.

[0074] This application does not specifically limit the positional relationship between the narrowing section 12 and the flow passage section 11, and it can adopt any of the following embodiments:

[0075] In Example 1, the reduced diameter section 12 is located at the end of the tube body 1, thereby reducing the molding difficulty of the reduced diameter section 12, improving the production efficiency of the heat exchange tube, and further improving the production efficiency of the heat exchanger with the heat exchange tube of this application installed, as well as reducing the production cost of the heat exchanger.

[0076] In this embodiment, the number of reduced diameter sections 12 is not specifically limited. Preferably, at least two reduced diameter sections 12 are provided, with the two reduced diameter sections 12 located at the two ends of the tube body 1 respectively. The flow passage section 11 is located between the multiple reduced diameter sections 12, thereby increasing the fixed points of the turbulence-disrupting element 2, thereby increasing the stability of the turbulence-disrupting element 2, so as to further avoid the phenomenon that the turbulence-disrupting element 2 can rotate relative to the tube body 1 and cause wear of the heat exchange tube, and thus further ensure the service life of the heat exchange tube.

[0077] It is understandable that the heat exchange tubes are connected to the tube sheet 3 through the reduced diameter section 12, and the reduced diameter section 12 is fixedly connected to the tube sheet 3 by welding.

[0078] Preferably, the reduced diameter section 12 is provided with three sections, two of which are located at the two ends of the pipe body 1, and the remaining reduced diameter section 12 is located in the middle of the length direction of the pipe body 1, so as to further improve the fixing effect on the flow disturbance 2. That is to say, in this scheme, the flow passage section 11 is provided with two sections, one of which is located between two adjacent reduced diameter sections 12, and the other is located between two other adjacent reduced diameter sections 12.

[0079] In other implementation examples, both the reduced diameter section 12 and the flow passage section 11 may each have only one section. That is, one end of the tube body 1 is fixedly connected to the tube sheet 3 through the reduced diameter section 12, and the other end of the tube body 1 is fixedly connected to the tube sheet 3 through the flow passage section 11, so as to fix the flow-turbing element 2 while reducing the production cost of the heat exchange tube. Alternatively, the reduced diameter section 12 may have two or more than three sections.

[0080] Example 2, in this example, refer to Figure 1 and Figure 2 The flow passage 11 has at least two sections, and the narrowing section 12 is located between the multiple flow passage sections 11.

[0081] It is understood that the two flow sections 11 are located at the two ends of the tube body 1 respectively. When the heat exchange tube in this application is connected to the tube sheet 3, the flow section 11 is connected to the tube sheet 3 so that the heat exchange tube can be fixedly connected to the tube sheet 3 by means of expansion or welding, thereby improving the flexibility of the connection method between the heat exchange tube and the tube sheet 3. At the same time, it can also ensure the flow area at the end of the tube body 1 so that more medium can enter the interior of the tube body 1 through the tube opening of the tube body 1, thereby ensuring the heat transfer performance of the heat exchange tube.

[0082] Preferably, the flow passage 11 is provided with three sections and the narrowing section 12 is provided with two sections. One narrowing section 12 is located between two adjacent flow passage sections 11, and the other narrowing section 12 is located between two other adjacent flow passage sections 11, so as to increase the fixed points of the turbulence-disrupting element 2 and increase the stability of the turbulence-disrupting element 2.

[0083] Of course, in other implementation examples, the flow passage 11 may also be configured with two or more than three segments.

[0084] Furthermore, refer to Figure 9 The reduced diameter section 12 has an outer end located near the tube sheet 3, and the tube sheet 3 has an inner side facing the middle position in the length direction of the heat exchanger. The distance L between the outer end and the inner side satisfies: L≥0.1mm, which allows the reduced diameter section 12 to avoid the tube sheet 3, thereby ensuring the connection area between the tube body 1 and the tube sheet 3, increasing the connection stability between the heat exchange tube and the tube sheet 3, and thus increasing the service life of the heat exchanger with the heat exchange tube of this application installed.

[0085] In this embodiment, the length of the deflector 2 is less than the length of the pipe body 1, so that a clearance space is formed between the end of the deflector 2 and the end of the pipe body 1.

[0086] It is understandable that one end of the baffle 2 is correspondingly set to one end of the tube body 1, and the other end of the baffle 2 is correspondingly set to the other end of the tube body 1. Furthermore, there is a set distance between the end of the baffle 2 and the corresponding end of the tube body 1, thereby creating a clearance space between the end of the baffle 2 and the end of the tube body 1 to accommodate the expansion joint device. This reduces the difficulty of fixing the tube body 1 using the expansion joint method, thereby improving the assembly efficiency of the heat exchanger.

[0087] Of course, in a heat exchanger where the heat exchange tubes are fixed by welding, the length of the turbulence-disrupting element 2 can also be set to be equal to the length of the tube body 1.

[0088] In other embodiments, the spiral turbulence ring can also be fixedly connected to the pipe body 1 by welding or other fasteners.

[0089] In a preferred embodiment, the flow disruptor 2 has a straight section and a twisted section, with the straight section located at the end of the twisted section. This eliminates the need for twisting at the end of the flow disruptor 2, thereby reducing the manufacturing difficulty of the flow disruptor 2 and improving the manufacturing efficiency of the heat exchange tube.

[0090] This application does not specify the number of straight sections. It may have one section, meaning that one end of the spoiler 2 is not twisted; or it may have two sections, meaning that neither end of the spoiler 2 is twisted.

[0091] Of course, in another preferred approach, the straight section design can be eliminated. That is, the flow deflector 2 is twisted from one end to the other to ensure the flow deflection effect on the medium.

[0092] This application does not specify the torsion method of the spoiler 2. It can be that the spoiler 2 is torsion processed outside the pipe body 1 and then installed inside the pipe body 1. Alternatively, other structures such as plate structures and V-shaped structures that are torsionized to form the spoiler 2 can be placed inside the pipe body 1 and then torsion processed inside the pipe body 1.

[0093] Reference Figure 9 This application also discloses a heat exchanger, which includes a cylinder, a tube box disposed at the end of the cylinder, a tube sheet 3 disposed between the cylinder and the tube box, and the aforementioned heat exchange tubes, wherein the heat exchange tubes are located inside the cylinder and the ends of the heat exchange tubes are welded or expanded to the tube sheet 3.

[0094] Because the heat exchanger in this application uses the aforementioned flow-around heat exchange tube, the production difficulty of the heat exchange tube is reduced, and the production efficiency of the heat exchange tube is improved, thereby reducing the production difficulty of the heat exchanger and improving the production efficiency of the heat exchanger.

[0095] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0096] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0097] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A heat exchange tube, characterized in that, The device includes a tube body (1) and a flow disruptor (2) formed by twisting a strip member (21). The flow disruptor (2) is disposed inside the tube body (1), and the strip member (21) has a central axis and a torsion axis. The torsion axis is spaced apart from the central axis so that the flow disruptor (2) has a first spiral line closer to the torsion axis and a second spiral line farther from the torsion axis. The first spiral line is spaced apart from the inner wall of the tube body (1), and the second spiral line abuts against the inner wall of the tube body (1).

2. A heat exchange tube according to claim 1, characterized in that, The strip member (21) is a strip plate-like structure.

3. A heat exchange tube according to claim 1, characterized in that, The strip member (21) includes a first plate and a second plate arranged at an angle to the first plate, and the central axis is located at the intersection of the first plate and the second plate.

4. A heat exchange tube according to any one of claims 1-3, characterized in that, The pipe body (1) includes a flow passage section (11) and a reduced diameter section (12). The inner diameter of the reduced diameter section (12) is smaller than the inner diameter of the flow passage section (11) so that the inner wall of the reduced diameter section (12) abuts against the flow deflector (2) to compress and fix the flow deflector (2).

5. A heat exchange tube according to claim 4, characterized in that, The reduced diameter section (12) is located at the end of the tube body (1).

6. A heat exchange tube according to claim 5, characterized in that, The reduced diameter section (12) is provided in at least two sections, wherein the two sections of the reduced diameter section (12) are respectively located at the two ends of the pipe body (1), and the flow passage section (11) is located between the multiple sections of the reduced diameter section (12).

7. A heat exchange tube according to claim 4, characterized in that, The flow passage (11) is provided with at least two sections, and the narrowing section (12) is located between multiple flow passages (11).

8. A heat exchange tube according to claim 7, characterized in that, The reduced diameter section (12) has an outer end located near the tube sheet (3), and the tube sheet (3) has an inner side located towards the middle position in the length direction of the heat exchanger. The distance L between the outer end and the inner side satisfies: L≥0.1mm.

9. A heat exchange tube according to any one of claims 1-3, characterized in that, The length of the baffle (2) is less than the length of the pipe (1) so that a clearance space is formed between the end of the baffle (2) and the end of the pipe (1); And / or, the spoiler (2) has a straight section and a twisted section, the straight section being located at the end of the twisted section.

10. A heat exchanger, characterized in that, It includes a cylindrical body, a tube box disposed at the end of the cylindrical body, a tube sheet (3) disposed between the cylindrical body and the tube box, and a heat exchange tube as described in any one of claims 1-9 above, wherein the heat exchange tube is located inside the cylindrical body and the end of the heat exchange tube is welded or expanded to the tube sheet (3).

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