Adjustable self-cleaning heat exchange tube

Abstract

The utility model discloses an adjustable self-cleaning heat exchange tube in the technical field of heat exchange tubes. The adjustable self-cleaning heat exchange tube comprises a tube body, a plurality of fins; the first support comprises a first supporting disc and a plurality of first supporting rods. A driving rod; a spiral sheet; a rotating shaft; a fan blade; and a clutch mechanism. By arranging the fan blades, heat exchange media can be disturbed so that the heat exchange media can generate a turbulent flow state in the heat exchange pipe, the effects of damaging a boundary layer, enhancing fluid mixing and reducing scale deposition can be achieved, the heat transfer performance is improved, power transmission is interrupted or connected through the clutch mechanism, self-cleaning of scale can be achieved, and the heat exchange efficiency is improved. And the flow speed of a heat exchange medium can be prevented from being reduced for a long time, so that the heat exchange efficiency is improved, the situation that the inner wall of the pipeline is scratched or damaged, and an anti-corrosion layer is damaged can be avoided, the service life of the heat exchange pipe is prolonged, the damage speed of the spiral piece can be reduced, frequent replacement is avoided, and the stability of long-term operation of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange tubes, in particular to an adjustable self-cleaning heat exchange tube. Background Art

[0002] Waste heat boilers (HRSGs) are highly efficient energy recovery devices that primarily recycle waste heat and convert it into valuable steam, thereby improving energy efficiency. For example, in steel mills, large-scale production equipment like blast furnaces and converters generate large quantities of high-temperature exhaust gases during operation. HRSGs capture the heat in these gases and convert it into steam, which can then be used to generate electricity, drive various production equipment, or meet heating needs, thus achieving efficient energy recycling.

[0003] The heat exchange tube is a key component in the waste heat boiler. Its working principle is that one end of the heat pipe is exposed to high-temperature flue gas and absorbs heat through heat conduction; the other end is immersed in low-temperature water, and the absorbed heat is transferred to the water with the help of the heat exchange medium inside the heat pipe, causing the water to evaporate and produce steam.

[0004] During operation, scale easily forms on the inner walls of heat exchange tubes. As scale accumulates, the thermal resistance of the tubes gradually increases, significantly reducing heat exchange efficiency and impacting the overall performance of the waste heat boiler. To address this issue, self-cleaning heat exchange tubes have emerged in the prior art. During operation, these tubes utilize a heat transfer medium to drive fan blades, which in turn drive a scraping mechanism to continuously scrape the inner walls of the tubes, thereby preventing scale formation.

[0005] However, during the operation of the current self-cleaning heat exchange tubes, the heat exchange medium always needs to drive the scraping mechanism to work during the circulation process to perform long-term and continuous mechanical cleaning of the inner wall of the heat exchange tube; although this method is effective, on the one hand it reduces the flow rate of the heat exchange medium, resulting in a decrease in heat exchange efficiency, and on the other hand it will cause scratches or damage to the inner wall of the pipe, thereby destroying the anti-corrosion layer of the inner wall of the pipe and shortening its service life. Utility Model Content

[0006] The purpose of the utility model is to provide an adjustable self-cleaning heat exchange tube, which solves the technical problems of low heat exchange efficiency and short service life of the self-cleaning heat exchange tube in the prior art.

[0007] The utility model discloses an adjustable self-cleaning heat exchange tube, comprising:

[0008] a tube body having a fluid passage therein;

[0009] A plurality of fins are sleeved on the tube body and arranged at intervals along the axial direction of the tube body;

[0010] A bracket 1 is arranged at one end of the fluid channel, comprising

[0011] Support plate 1, with a cavity inside,

[0012] A plurality of support rods 1 are arranged around the outside of the support plate 1 and fixedly connected to the inner wall of the fluid channel;

[0013] a driving rod, coaxially arranged with the fluid channel, one end of which is rotatably connected to the support plate and penetrates into the cavity;

[0014] A spiral sheet is arranged in close contact with the fluid channel and connected to the driving rod at both ends;

[0015] a rotating shaft, coaxially arranged with the fluid channel, one end of which is rotatably connected to the support plate and penetrates into the cavity;

[0016] a fan blade, mounted on the other end of the rotating shaft;

[0017] A clutch mechanism is installed in the cavity and is used to interrupt or connect the power transmission between the rotating shaft and the driving rod.

[0018] By setting fan blades, the present application can disturb the heat exchange medium, causing it to produce a turbulent state in the heat exchange tube, thereby destroying the boundary layer, enhancing fluid mixing and reducing scale deposition, thereby significantly improving the heat transfer performance of the heat exchange tube; and by setting a clutch mechanism to interrupt or connect power transmission, it can not only achieve self-cleaning of scale, but also avoid long-term reduction in the flow rate of the heat exchange medium, thereby improving heat exchange efficiency, and avoiding scratches or damage to the inner wall of the pipeline, extending the service life of the heat exchange tube, and reducing the damage rate of the spiral blades, avoiding frequent replacement, and improving the long-term operation stability of the equipment.

[0019] On the basis of the above technical solution, the solution of this application can also be improved as follows:

[0020] Preferably, the clutch mechanism includes:

[0021] An adjusting rod, one end of which is threadedly connected to the support plate and penetrates into the cavity, and the other end of which is threadedly connected to the tube body and penetrates out of the tube body;

[0022] a first bevel gear, provided at one end of the driving rod located in the cavity;

[0023] a second bevel gear, provided at one end of the rotating shaft located in the cavity;

[0024] Bevel gear three is arranged in the cavity and is rotatably sleeved on the adjusting rod, and can be simultaneously engaged with bevel gear one and bevel gear two under the drive of the adjusting rod;

[0025] The rotating wheel is arranged at one end of the adjusting rod located outside the tube body; adopting this solution, the user can conveniently and quickly complete the state adjustment of the clutch mechanism from the outside, thereby improving the operating efficiency, and the structure is stable and isolated from the external environment, ensuring the stability of power transmission and improving the reliability of the equipment.

[0026] Preferably, a movable channel is provided in one of the support rods, and the adjusting rod is passed through the movable channel; adopting this solution, firstly, it plays a limiting and guiding role, so that the adjusting rod is not easy to deviate or shake, thereby improving stability and reliability; secondly, it plays a sealing role, preventing the heat exchange medium from following the adjusting rod into the cavity or outside the heat exchange tube; thirdly, it optimizes the spatial layout, avoiding excessive obstruction to the circulation of the heat exchange medium.

[0027] Preferably, the clutch mechanism includes:

[0028] The positioning sleeve is installed in the cavity and is threadedly sleeved with one end of the adjusting rod; adopting this solution can improve the structural stability of the adjusting rod, enhance the bearing capacity, and thus improve the power transmission stability of the bevel gear three.

[0029] Preferably, it includes:

[0030] The second bracket is arranged at the other end of the fluid channel and includes

[0031] A second support plate is coaxially arranged with the driving rod and is rotatably connected thereto;

[0032] A plurality of support rods 2 are arranged in a ring outside the support plate 2 and are fixedly connected to the inner wall of the fluid channel; this solution avoids shaking, ensures the smoothness of rotation, reduces stress concentration, and improves structural strength; in addition, it avoids excessive obstruction to the circulation of the heat exchange medium, thereby ensuring heat exchange efficiency.

[0033] Preferably, a plurality of notches are evenly provided on the periphery of the fins; adopting this solution can effectively reduce the accumulation of soot on the surface of the fins, ensuring that the heat exchange tubes continue to maintain excellent heat exchange performance.

[0034] Preferably, the notch is in a strip-shaped structure and extends toward the center along the diameter direction of the fin, with the width gradually decreasing; adopting this solution ensures the uniformity of heat dissipation of the fin.

[0035] Preferably, the bottom of the notch is in an arc-shaped structure; adopting this solution avoids stress concentration at the bottom and improves structural strength.

[0036] Through the above technical solution, the utility model achieves the following beneficial effects:

[0037] 1. This application uses fan blades to disturb the heat exchange medium, causing it to generate turbulent flow within the heat exchange tubes. This can then destroy the boundary layer, enhance fluid mixing, and reduce scale deposition, thereby significantly improving the heat transfer performance of the heat exchange tubes.

[0038] 2. This application interrupts or connects the power transmission between the rotating shaft and the driving rod by setting a clutch mechanism, which can not only achieve self-cleaning of scale, but also avoid long-term reduction of the flow rate of the heat exchange medium, thereby improving the heat exchange efficiency. It can also avoid scratches or damage to the inner wall of the pipeline, causing damage to the anti-corrosion layer of the inner wall of the pipeline, thereby extending the service life of the heat exchange tube, and reducing the damage rate of the spiral blades, avoiding frequent replacement, thereby improving the long-term operation stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 This is a front cross-sectional view of the adjustable self-cleaning heat exchange tube according to an embodiment of the present utility model;

[0041] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0042] Figure 3 for Figure 1 A bottom cross-sectional view of the adjustable self-cleaning heat exchange tube shown;

[0043] Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle;

[0044] Figure 5 for Figure 1 A bottom view of the adjustable self-cleaning heat exchange tube;

[0045] Description of reference numerals:

[0046] 1. Tube body; 2. Fins; 3. Bracket 1; 4. Drive rod; 5. Spiral blade; 6. Rotating shaft; 7. Fan blade; 8. Clutch mechanism; 9. Bracket 2;

[0047] 11. Fluid channel; 21. Notch; 31. Support plate 1; 32. Support rod 1; 81. Adjustment rod; 82. Bevel gear 1; 83. Bevel gear 2; 84. Bevel gear 3; 85. Rotor; 86. Positioning sleeve; 91. Support plate 2; 92. Support rod 2;

[0048] 311. Cavity; 321. Active channel. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0050] First of all, it should be noted that in the following description, some directional words involved in order to clearly illustrate the technical solution of the present invention, such as the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are all based on the meanings of the normal directions of the components in the adjustable self-cleaning heat exchange tube by analogy. 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. Therefore, they cannot be understood as a limitation on the present invention.

[0051] In this application, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0052] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0053] Example:

[0054] like Figure 1 and Figure 2 As shown, an embodiment of the present application discloses an adjustable self-cleaning heat exchange tube, which is a key component used in a waste heat boiler. Its specific structure includes: a tube body 1, multiple fins 2, a bracket 3, a drive rod 4, a spiral sheet 5, a rotating shaft 6, a fan blade 7 and a clutch mechanism 8.

[0055] The tube body 1 is cylindrical and has a fluid channel 11 inside for allowing heat exchange medium to flow to achieve heat exchange.

[0056] A plurality of fins 2 are sleeved on the tube body 1 and arranged at intervals along the axial direction of the tube body 1 to increase the heat exchange area and improve the heat exchange efficiency.

[0057] Bracket 1 3 is arranged at one end of the fluid channel 11 and is used to support the drive rod 4. It includes a support plate 1 31 and multiple support rods 1 32. Among them, the support plate 1 31 has a cavity 311 inside to provide installation space; multiple support rods 1 32 are arranged around the outside of the support plate 1 31 and are fixed to the inner wall of the fluid channel 11 to firmly support the support plate 1 31.

[0058] The driving rod 4 is coaxially arranged with the fluid channel 11 , and one end is rotatably connected to the supporting disk 1 31 and penetrates into the cavity 311 to provide rotational power for the spiral sheet 5 .

[0059] The spiral blade 5 is arranged in close contact with the fluid channel 11 and connected to the driving rod 4 at both ends. It is used to rotate under the drive of the driving rod 4 to clean scale on the inner wall of the fluid channel 11.

[0060] The rotating shaft 6 is coaxially arranged with the fluid channel 11 , and one end is rotatably connected to the supporting disk 1 31 and penetrates into the cavity 311 to provide rotational power to drive the spiral blade 5 to rotate.

[0061] The fan blade 7 is mounted on the other end of the rotating shaft 6 and is used to rotate under the push of the heat exchange medium, thereby continuously outputting rotational power and stirring the heat exchange medium.

[0062] The clutch mechanism 8 is installed in the cavity 311 and is used to interrupt or connect the power transmission between the rotating shaft 6 and the driving rod 4 to achieve independent control of the rotation of the spiral sheet 5.

[0063] In the above technical solution, the specific working method is as follows:

[0064] Under normal conditions, the heat exchange medium enters the fluid channel 11 from the bottom of the tube body 1, and then pushes the fan blades 7 to rotate. During the rotation of the fan blades 7, the heat exchange medium is disturbed, causing it to produce a turbulent state in the heat exchange tube, thereby destroying the boundary layer, enhancing fluid mixing and reducing scale deposition, thereby significantly improving the heat transfer performance of the heat exchange tube.

[0065] During cleaning, the clutch mechanism 8 is controlled to connect the power transmission between the rotating shaft 6 and the driving rod 4, so that the rotating shaft 6 will drive the driving rod 4 to rotate together, and the driving rod 4 will drive the spiral piece 5 to rotate, thereby scraping and cleaning the scale on the inner wall of the fluid channel 11; and after cleaning is completed, the clutch mechanism 8 is controlled again to interrupt the power transmission.

[0066] The utility model is provided with fan blades 7, which can disturb the heat exchange medium and generate turbulent flow in the heat exchange tube, thereby destroying the boundary layer, enhancing fluid mixing and reducing scale deposition, thereby significantly improving the heat transfer performance of the heat exchange tube;

[0067] By setting up a clutch mechanism 8 to interrupt or connect the power transmission between the rotating shaft 6 and the driving rod 4, it can not only achieve self-cleaning of scale, but also avoid long-term reduction of the flow rate of the heat exchange medium, thereby improving the heat exchange efficiency. It can also avoid scratches or damage to the inner wall of the pipeline, causing the anti-corrosion layer of the inner wall of the pipeline to be destroyed, thereby extending the service life of the heat exchange tube, and reducing the damage rate of the spiral blade 5, avoiding frequent replacement, thereby improving the long-term operation stability of the equipment.

[0068] In some embodiments, as Figures 2 to 5 As shown, in order to facilitate the operator to operate, the clutch mechanism 8 includes: an adjusting rod 81, a bevel gear 1 82, a bevel gear 2 83, a bevel gear 3 84 and a rotating wheel 85, and its specific configuration is as follows:

[0069] One end of the adjusting rod 81 is threadedly connected to the supporting plate 1 31 and penetrates into the cavity 311, and the other end is threadedly connected to the tube body 1 and passes out of the tube body 1 to facilitate external operation and control;

[0070] Bevel gear 1 82 is provided at one end of the driving rod 4 located in the cavity 311 and is responsible for transmitting the received power to the driving rod 4 to drive the relevant components to work;

[0071] The second bevel gear 83 is provided at one end of the rotating shaft 6 located in the cavity 311 and is responsible for transmitting the power of the rotating shaft 6 to the inside of the clutch mechanism 8;

[0072] Bevel gear three 84 is arranged in the cavity 311 and is rotatably sleeved on the adjustment rod 81. Under the drive of the adjustment rod 81, it can simultaneously engage with bevel gear one 82 and bevel gear two 83 to achieve power transmission and interruption;

[0073] The rotating wheel 85 is arranged at one end of the adjusting rod 81 outside the tube body 1, which is convenient for the user to manually adjust. The operation is simple and intuitive, and the use is convenient.

[0074] During operation, the rotating wheel 85 rotates, driving the adjusting rod 81 to rotate. Simultaneously, because the adjusting rod 81 is threadedly connected to the tube body 1 and the supporting plate 1 31, the adjusting rod 81 also undergoes linear motion, thereby driving bevel gear 3 84 to simultaneously engage with bevel gear 1 82 and bevel gear 2 83. At this point, the rotational power of the rotating shaft 6 is transmitted sequentially through bevel gear 2 83, bevel gear 3 84, and bevel gear 1 82 to the driving rod 4, thereby driving the spiral blade 5 to perform the scraping operation.

[0075] The above-mentioned design of the clutch mechanism 8 allows the user to quickly and easily adjust the state of the clutch mechanism 8 from the outside, thereby improving operational efficiency. The structure is stable and isolated from the external environment, thereby ensuring the stability of power transmission and improving the reliability of the equipment.

[0076] Based on the above embodiment, Figures 2 to 4 As shown, a movable channel 321 is provided in a support rod 1 32 , and the adjustment rod 81 is passed through the movable channel 321 .

[0077] Through the above-mentioned setting, firstly, it plays a limiting and guiding role, making it difficult for the adjustment rod 81 to deviate or shake, thereby improving stability and reliability; secondly, it plays a sealing role, preventing the heat exchange medium from following the adjustment rod 81 into the cavity 311 or outside the heat exchange tube; thirdly, it optimizes the spatial layout to avoid excessive obstruction to the circulation of the heat exchange medium.

[0078] Based on the above embodiment, Figure 2 and Figure 4 As shown, the clutch mechanism 8 includes a positioning sleeve 86 , which is installed in the cavity 311 and is threadedly sleeved with one end of the adjustment rod 81 .

[0079] Through the above arrangement, the end of the adjusting rod 81 can be locked and fixed, thereby improving the structural stability of the adjusting rod 81, enhancing the load-bearing capacity, and improving the power transmission stability of the bevel gear three 84.

[0080] In some embodiments, as Figure 1 As shown, it also includes: a bracket 2 9, which is arranged at the other end of the fluid channel 11, including a support plate 2 91 and a plurality of support rods 2 92; wherein, the support plate 2 91 is coaxially arranged with the drive rod 4 and is rotatably connected; the plurality of support rods 2 92 are arranged around the outside of the support plate 2 91 and are fixedly connected to the inner wall of the fluid channel 11.

[0081] Through the above arrangement, the other end of the driving rod 4 can be supported without interfering with its rotation, thereby avoiding shaking, ensuring the smoothness of rotation, reducing stress concentration, and improving structural strength; in addition, it also avoids excessive obstruction to the circulation of the heat exchange medium, ensuring heat exchange efficiency.

[0082] In some embodiments, as Figure 3 and Figure 4 As shown, a plurality of notches 21 are evenly formed on the outer periphery of the fin 2 .

[0083] It should be noted that since the smoke is rich in soot, when it flows through the fins 2, the soot tends to accumulate on the surface of the fins 2. Once the accumulation is too thick, it not only affects the heat dissipation of the fins 2, but also affects the tube body 1, thereby reducing the overall heat dissipation efficiency.

[0084] By designing notches 21 on the periphery of the fins 2, when soot accumulates to a certain level, it will fall from the notches 21 due to gravity, thereby effectively reducing soot accumulation on the surface of the fins 2 and ensuring that the heat exchange tubes continue to maintain excellent heat exchange performance.

[0085] Based on the above embodiment, the notch 21 is in a strip-shaped structure and extends toward the center along the diameter direction of the fin 2 , and its width gradually decreases, which ensures uniform heat dissipation of the fin 2 .

[0086] Based on the above embodiment, the bottom of the notch 21 is in an arc-shaped structure, which avoids stress concentration at the bottom and improves the structural strength.

[0087] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An adjustable self-cleaning heat exchange tube, characterized in that: include: a tube body having a fluid passage therein; A plurality of fins are sleeved on the tube body and arranged at intervals along the axial direction of the tube body; A bracket 1 is arranged at one end of the fluid channel, comprising Support plate 1, with a cavity inside, A plurality of support rods 1 are arranged around the outside of the support plate 1 and fixedly connected to the inner wall of the fluid channel; a driving rod, coaxially arranged with the fluid channel, one end of which is rotatably connected to the support plate and penetrates into the cavity; A spiral sheet is arranged in close contact with the fluid channel and connected to the driving rod at both ends; a rotating shaft, coaxially arranged with the fluid channel, one end of which is rotatably connected to the support plate and penetrates into the cavity; a fan blade, mounted on the other end of the rotating shaft; A clutch mechanism is installed in the cavity and is used to interrupt or connect the power transmission between the rotating shaft and the driving rod.

2. The adjustable self-cleaning heat exchange tube according to claim 1, characterized in that: The clutch mechanism comprises: An adjusting rod, one end of which is threadedly connected to the support plate and penetrates into the cavity, and the other end of which is threadedly connected to the tube body and penetrates out of the tube body; a first bevel gear, provided at one end of the driving rod located in the cavity; a second bevel gear, provided at one end of the rotating shaft located in the cavity; Bevel gear three is arranged in the cavity and is rotatably sleeved on the adjusting rod, and can be simultaneously engaged with bevel gear one and bevel gear two under the drive of the adjusting rod; The rotating wheel is arranged at one end of the adjusting rod outside the tube body.

3. The adjustable self-cleaning heat exchange tube according to claim 2, characterized in that: A movable channel is provided in one of the support rods, and the adjusting rod is passed through the movable channel.

4. The adjustable self-cleaning heat exchange tube according to claim 2, characterized in that: The clutch mechanism comprises: The positioning sleeve is installed in the cavity and is threadedly sleeved with one end of the adjusting rod.

5. The adjustable self-cleaning heat exchange tube according to claim 1, characterized in that: include: The second bracket is arranged at the other end of the fluid channel and includes A second support plate is coaxially arranged with the driving rod and is rotatably connected thereto; A plurality of support rods 2 are arranged around the outside of the support plate 2 and are fixedly connected to the inner wall of the fluid channel.

6. The adjustable self-cleaning heat exchange tube according to claim 1, characterized in that: A plurality of notches are evenly formed on the outer periphery of the fin.

7. The adjustable self-cleaning heat exchange tube according to claim 6, characterized in that: The notch is in a strip-shaped structure and extends toward the center along the diameter direction of the fin, with a width gradually decreasing.

8. The adjustable self-cleaning heat exchange tube according to claim 6, characterized in that: The bottom of the notch is in an arc-shaped structure.

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