Fixed frequency adjustable anti-resonance tube-fin heat exchanger structure

Abstract

The application discloses a fixed-frequency adjustable anti-resonance tube-fin heat exchanger structure, which comprises a plurality of spiral fin tubes, a plurality of support plate assemblies, a plurality of track assemblies, a plurality of heat exchange fins and a plurality of nuts. The plurality of spiral fins are arranged at intervals along the up-down direction, the plurality of support plate assemblies are arranged at intervals along the extending direction of the spiral fin tubes, each support plate assembly comprises a plurality of support horizontal plates, the two side surfaces of each support horizontal plate are concavely provided with a plurality of arc-shaped grooves, the two adjacent support horizontal plates are located on the upper and lower sides of a spiral fin tube, each heat exchange fin is sleeved on the spiral fin tube and the outer circumferential side of the heat exchange fin is clamped by the arc-shaped grooves of the two support horizontal plates, and the two ends of each support horizontal plate are welded with corresponding screw rods. Each track assembly comprises two steel plates, each steel plate is provided with through holes arranged at intervals along the length direction, and the plurality of nuts are threadedly connected with the corresponding screw rods. In this way, the interval between the support horizontal plates can be adjusted to avoid the resonance of the heat exchanger.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tubular heat exchanger equipment, in particular to a fixed frequency adjustable anti-resonance tube fin heat exchanger structure. BACKGROUND

[0002] The tubular flue gas heat exchanger is one of the important equipment of the flue gas ultra-low emission system, in order to improve the heat transfer effect, the heat exchange pipe mostly adopts high-frequency welding spiral fin tube. In actual operation, the change of working condition, the complexity of flue gas flow state, the dust carried in the flue gas, cause the heat exchanger to produce resonance, the resonance causes the relative movement between the heat exchange pipe and the rigid structure, thereby causing the impact and fretting wear of the pipe, which seriously affects the safe and stable operation of the equipment.

[0003] In order to avoid the resonance of the heat exchanger, the engineering usually installs the multi-hole support plate in the heat exchanger, suppresses the occurrence of the standing wave acoustic resonance of the tubular heat exchanger, and achieves the purpose of preventing resonance, but the installed multi-hole support plate is easy to cause other vibration and cause thermal deformation in use, which can only suppress the resonance caused by the vertical sound standing wave frequency, cannot avoid the resonance caused by the structure inherent frequency, and the multi-hole support plate is a hole plate structure, cannot adjust the plate spacing, cannot change the inherent frequency of the heat exchanger, and therefore needs to be improved. SUMMARY

[0004] The present application aims to overcome the above-mentioned deficiencies, and provides a fixed frequency adjustable anti-resonance tube fin heat exchanger structure, which aims to prevent the heat exchanger from producing resonance by adjusting the spacing of the support plate.

[0005] The application discloses a fixed-frequency adjustable anti-resonance finned tube heat exchanger structure, which comprises a plurality of spiral finned tubes, a plurality of support plate assemblies, a plurality of track assemblies, a plurality of heat exchange fins and a plurality of nuts.

[0006] Preferably, the two screws on each support horizontal plate are coaxially arranged, and the arc-shaped grooves on the upper and lower sides of each support horizontal plate are symmetrically arranged along the axis of the screw.

[0007] Preferably, the diameter of the arc-shaped groove is larger than the outer diameter of the heat exchange fin.

[0008] Preferably, the two ends of each support horizontal plate are provided with threaded holes, and the screw is threadedly connected with the corresponding threaded hole.

[0009] Preferably, the two ends of each steel plate are welded to the shell of the heat exchanger.

[0010] Preferably, each steel plate is made of 316L stainless steel.

[0011] With the above scheme, the application has the following beneficial effects: each support horizontal plate can rotate around the axis of the corresponding screw; when the support horizontal plate is rotated counterclockwise or clockwise by 90 degrees, the support horizontal plate can move horizontally between the two spiral finned tubes, thereby changing the distance between the support plate assemblies; when the vortex shedding frequency coincides with or approaches the natural frequency of the pipe, resonance will occur; adjusting the distance between the support plate assemblies can adjust the size of the natural frequency; in this way, the heat exchanger can be prevented from resonating, the risk of heat exchanger leakage can be reduced, and the service life of the heat exchanger can be prolonged. Attached Figure Description

[0012] Figure 1 This is a front view of an embodiment of a fixed-frequency adjustable anti-resonance tube-fin heat exchanger structure according to the present invention.

[0013] Figure 2 This is a top view of an embodiment of a fixed-frequency adjustable anti-resonance tube-fin heat exchanger structure according to the present invention.

[0014] Figure 3 This is a structural cross-sectional view of an embodiment of a fixed-frequency adjustable anti-resonance tube-fin heat exchanger structure according to the present invention.

[0015] Figure 4 for Figure 3 A structural cross-sectional view of the central supporting horizontal plate;

[0016] Figure 5 for Figure 2 A magnified view of part A in the middle;

[0017] Figure 6 for Figure 4 A magnified view of part B in the middle.

[0018] Explanation of reference numerals in the attached drawings: 1. Spiral finned tube; 2. Support plate assembly; 21. Support cross plate; 21a. Arc-shaped groove; 3. Track assembly; 31. Steel plate; 4. Heat exchange fins; 5. Nut; 6. Screw. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0020] like Figures 1 to 6 As shown, a fixed-frequency adjustable anti-resonance tube-fin heat exchanger structure includes multiple spiral finned tubes 1, multiple support plate assemblies 2, multiple track assemblies 3, multiple heat exchange fins 4, and multiple nuts 5. The multiple spiral finned tubes 1 extend laterally and are folded back and forth. The number of folds of the spiral finned tubes 1 can be 3, 4, 5, or other numbers, without specific limitation. The multiple spiral fins are also spaced apart vertically. The multiple support plate assemblies 2 are spaced apart along the extension direction of the spiral finned tubes 1. The spacing between the support plate assemblies 2 is related to the natural frequency of the heat exchanger. When the spacing between the support plate assemblies 2 is small, the natural frequency of the heat exchanger will increase; conversely, when the spacing between the support plate assemblies 2 is large, the natural frequency of the heat exchanger will decrease.

[0021] Each support plate assembly 2 comprises a plurality of support cross plates 21, the upper and lower sides of each support cross plate 21 are concavely provided with a plurality of arc-shaped grooves 21a, each arc-shaped groove 21a is arranged along the length direction of the support cross plate 21, each arc-shaped groove 21a is semi-circularly arranged, and the interval of each arc-shaped groove 21a is consistent with the interval of the spiral fin tube 1 reciprocating folding.

[0022] The plurality of support cross plates 21 are also arranged in intervals along the up-down direction, and the adjacent two support cross plates 21 are located on the upper and lower sides of a spiral fin tube 1. Each heat exchange fin 4 is in the shape of a spiral cylinder and is sleeved on the spiral fin tube 1. The outer circumferential side of each heat exchange fin 4 is clamped by the arc-shaped grooves 21a of the upper and lower support cross plates 21. In this way, each heat exchange fin 4 can be relatively fixed on the spiral fin tube 1 by the upper and lower adjacent support cross plates 21.

[0023] The two ends of the length direction of each support cross plate 21 are also welded and connected with the corresponding screw rod 6. A plurality of track assemblies 3 are arranged in intervals along the up-down direction. Each track assembly 3 comprises two steel plates 31 located on the two sides of the length direction of the support cross plate 21. The two ends of the length direction of each steel plate 31 are fixed on the shell of the heat exchanger. Each steel plate 31 is provided with through holes arranged in intervals along the length direction. Each through hole is used for the extension of the corresponding screw rod 6. A plurality of nuts 5 are threadedly connected with the corresponding screw rod 6, so that each support cross plate 21 can be fixed relative to the corresponding steel plate 31.

[0024] When it is necessary to adjust the interval between the support plate assemblies 2, the nuts 5 on the two sides of the length direction of each support cross plate 21 of the support plate assembly 2 to be adjusted are removed, and the corresponding screw rod 6 is also removed. At this time, each support cross plate 21 is rotated counterclockwise or clockwise by 90° around the center axis of the bolt, and then is moved to another through hole on the steel plate 31. After the two screw rods 6 pass through the corresponding through holes, they are connected with the corresponding support cross plate 21. Then the two nuts 5 are threadedly connected with the corresponding screw rod 6, so that the corresponding support cross plate 21 is fixed. The translation of the support cross plate 21 is completed, thereby changing the interval between the support plate assemblies 2, adjusting the size of the natural frequency, avoiding the resonance of the heat exchanger, reducing the risk of heat exchanger leakage, and improving the service life of the heat exchanger.

[0025] As a preferred, the two screw rods 6 on each support cross plate 21 are coaxially arranged, so that each support cross plate 21 can correspond to different through holes on the steel plate 31. Similarly, each arc-shaped groove 21a on the upper and lower sides of each support cross plate 21 is symmetrically arranged along the axis of the screw rod 6, so that the adjacent two support cross plates 21 can clamp and fix the heat exchange fin 4 on the same spiral fin tube 1.

[0026] In addition, the diameter of the arc-shaped groove 21a is greater than the outer diameter of the heat exchange fin 4, so that the two adjacent support plates 21 do not press the heat exchange fin 4 after being fixed, preventing the heat exchange fin 4 from deforming; it should be noted that the inner diameter of the two arc-shaped grooves 21a formed by the two adjacent support plates 21 after being fixed is in clearance fit with the outer diameter of the heat exchange fin 4, so as to ensure that the support plate 21 can play a supporting and fixing role, and effectively reduce the vibration damage between the support plate 21 and the heat exchange fin 4, and improve the service life of the heat exchanger.

[0027] In order to facilitate the disassembly and assembly of each support plate 21, the two ends of each support plate 21 in the length direction are recessed with threaded holes, and each screw rod 6 is threadedly connected with the corresponding threaded hole. In this way, each support plate 21 can be conveniently disassembled or assembled from the left and right steel plates 31.

[0028] It should be noted that the connection mode of the two ends of each steel plate 31 in the length direction and the shell of the heat exchanger can be screw locking, clamping or welding connection mode, in this embodiment, in order to ensure the reliability of the connection between the steel plate 31 and the shell of the heat exchanger, the connection mode of the two ends of each steel plate 31 in the length direction and the shell of the heat exchanger is welding connection mode.

[0029] In order to ensure the firmness and corrosion resistance of each steel plate 31, in this embodiment, each steel plate 31 is made of 316L stainless steel material, which has strong corrosion resistance and high temperature resistance, and has a long service life when used in heat exchanger equipment.

Claims

1. A fixed frequency tunable anti-resonance fin-and-tube heat exchanger structure, characterized by: The fixed frequency adjustable anti-resonance tube fin heat exchanger structure comprises a plurality of spiral fin tubes (1), a plurality of support plate assemblies (2), a plurality of track assemblies (3), a plurality of heat exchange fins (4), a plurality of screws (6) and a plurality of nuts (5), wherein The plurality of spiral fin tubes (1) are arranged reciprocatingly and folded transversely and are arranged spaced apart in the up-down direction; the plurality of support plate assemblies (2) are arranged spaced apart in the extending direction of the spiral fin tubes (1); each support plate assembly (2) comprises a plurality of support horizontal plates (21), the upper and lower sides of each support horizontal plate (21) are concavely provided with a plurality of arc-shaped grooves (21a), the arc-shaped grooves (21a) are arranged spaced apart in the length direction of the support horizontal plate (21), the plurality of support horizontal plates (21) are arranged spaced apart in the up-down direction, adjacent two support horizontal plates (21) are located on the upper and lower sides of a spiral fin tube (1), each heat exchange fin (4) is in the shape of a spiral cylinder and is sleeved on the spiral fin tube (1), the outer circumferential side of each heat exchange fin (4) is clamped by the arc-shaped grooves (21a) of the upper and lower support horizontal plates (21), and the two ends in the length direction of each support horizontal plate (21) are also welded to corresponding screws (6); The plurality of track assemblies (3) are arranged spaced apart in the up-down direction, each track assembly (3) comprises two steel plates (31), the two steel plates (31) are located on the two sides in the length direction of the support horizontal plate (21), the two ends in the length direction of each steel plate (31) are fixed on the shell of the heat exchanger, each steel plate (31) is provided with through holes arranged spaced apart in the length direction thereof, the through holes are used for the extension of corresponding screws (6), and the plurality of nuts (5) are threadedly connected with the corresponding screws (6) so that each support horizontal plate (21) can be fixed relative to the corresponding steel plate (31); The two screws (6) on each support horizontal plate (21) are coaxially arranged, and the arc-shaped grooves (21a) on the upper and lower sides of each support horizontal plate (21) are symmetrically arranged along the axis of the screw (6); The two ends in the length direction of each support horizontal plate (21) are concavely provided with threaded holes, and each screw (6) is threadedly connected with the corresponding threaded hole.

2. The fixed-frequency tunable anti-resonance tube-fin heat exchanger structure according to claim 1, characterized in that: The diameter of the arc-shaped groove (21a) is greater than the outer diameter of the heat exchange fin (4).

3. The fixed-frequency tunable anti-resonance tube-fin heat exchanger structure according to claim 1, characterized in that: The two ends in the length direction of each steel plate (31) are welded to the shell of the heat exchanger.

4. The fixed-frequency tunable anti-resonance tube-fin heat exchanger structure according to claim 1, characterized in that: Each steel plate (31) is made of 316L stainless steel material.

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