Frequency-adjustable anti-resonance boiler finned pipe fitting

Abstract

The utility model relates to the technical field of boiler parts, in particular to a frequency-adjustable anti-resonance boiler finned pipe fitting which comprises a pipe body and fins arranged on the pipe body, and an adjusting device used for adjusting the contact faces of the fins and fluid is arranged on the pipe body. The rotating mechanism is used for controlling the adjusting rotating shaft to rotate, the adjusting rotating shaft rotates to drive the fins to rotate, the contact faces of the fins and fluid are adjusted by changing the positions of the fins, and therefore the inherent frequency of the fins is changed, and the heat exchange efficiency is improved. The probability that resonance is generated due to the fact that the fluid mechanics effect frequency of fluid, the fin frequency and the tube body frequency are matched is reduced, and it is guaranteed that the fins and the tube body can work normally.

Description

Technical Field

[0001] The present application relates to the technical field of boiler components, and in particular to a frequency-adjustable anti-resonance boiler fin tube. Background Art

[0002] A waste heat boiler, also known as a waste heat boiler or heat recovery steam generator, is a device used to recover high-temperature exhaust gases, waste liquids, or waste heat generated during industrial production. By converting this waste heat into steam, it can be used for industrial production, heating, power generation, and other purposes. Finned tubes are a common heat exchange element in waste heat boilers, primarily serving to improve heat exchange efficiency.

[0003] In the related art, reference can be made to the Chinese utility model patent with authorization announcement number CN209279766U, which discloses a boiler fin tube with high energy-saving effect, including a shell, a plurality of base tubes evenly distributed in the inner cavity of the shell, a plurality of first fins fixedly connected to one side of the base tube, and a plurality of second fins fixedly connected to the other side of the base tube, a plurality of grooves are provided at the connection between the first fins, the second fins and the base tube, and the grooves are all embedded in the surface of the base tube, and the first fins and the second fins are fixedly connected to the upper and lower sides of one side with connecting blocks, and the connecting blocks are fixedly connected to the top and bottom of the base tube respectively, and the inner wall of the base tube is coated with a nano-ceramic thermal insulation coating.

[0004] However, in actual operation, when high-temperature exhaust gas or steam flows through the finned tube, the flow characteristics of the fluid (such as velocity and pressure distribution) may match the natural frequency of the finned tube under certain conditions, thereby causing resonance. The resonance increases the vibration of the tube and fins, affecting their normal function. Utility Model Content

[0005] In order to reduce the probability of resonance between pipes and fins, the present application provides a frequency-adjustable anti-resonance boiler fin pipe fitting.

[0006] This application provides a frequency-adjustable anti-resonance boiler fin tube, which adopts the following technical solution:

[0007] A frequency-adjustable anti-resonance boiler fin tube includes a tube body and fins arranged on the tube body. The tube body is provided with an adjustment device for adjusting the contact surface between the fins and the fluid, and the adjustment device includes:

[0008] An adjusting shaft, the adjusting shaft being rotatably disposed on the tube body, and the fin being rotatably connected to the tube body via the adjusting shaft;

[0009] The rotating mechanism is arranged on the tube body and is used to drive the adjusting shaft to rotate.

[0010] By adopting the above technical solution, a rotating mechanism is used to control the rotation of the adjusting shaft, and the rotation of the adjusting shaft drives the rotation of the fins. By changing the position of the fins, the contact surface between the fins and the fluid is adjusted, thereby changing the natural frequency of the fins, reducing the probability of resonance caused by the matching of the fluid mechanics effect frequency, the fin frequency and the tube body frequency, and ensuring that the fins and the tube body can work normally.

[0011] Optionally, the rotation mechanism includes:

[0012] A rotating rod, the rotating rod being rotatably arranged on the tube body;

[0013] a first bevel gear, the first bevel gear being disposed on the rotating rod;

[0014] a second bevel gear, the second bevel gear being disposed on the adjusting shaft and meshing with the first bevel gear;

[0015] The limiting assembly is arranged on the tube body and is used to limit the rotation of the rotating rod.

[0016] By adopting the above technical solution, the limit assembly is unlocked, the rotating rod is rotated, the rotation of the rotating rod drives the first bevel gear to rotate, the rotation of the first bevel gear drives the second bevel gear to rotate, the rotation of the second bevel gear drives the adjustment shaft to rotate, the rotation of the adjustment shaft drives the fin to rotate, after the fin is rotated to the appropriate position, the limit assembly is locked, thereby completing the rotation work of the fin position.

[0017] Optionally, the limiting component includes:

[0018] A mounting block, the mounting block being arranged on the tube body and having a rotation hole for the rotation rod to pass through;

[0019] A limit block, wherein a sliding groove is provided on the inner side wall of the rotating hole in a direction close to or away from the rotating rod, and the limit block is slidably mounted on the sliding groove;

[0020] A limit spring, the limit spring being arranged on the inner bottom wall of the sliding groove and connected to the limit block, wherein the limit block partially extends out of the sliding groove under the action of the limit spring and abuts against the outer side wall of the rotating rod;

[0021] The moving part is arranged on the mounting block and is used to drive the limiting block to compress the limiting spring and move.

[0022] By adopting the above technical solution, when there is no need to rotate the rotating rod, the limit block partially passes through the sliding groove under the action of the limit spring and presses against the outer wall of the rotating rod, thereby limiting the position of the rotating rod; when the rotating rod needs to be rotated, the moving part is used to drive the limit block to compress the limit spring to move, so that the limit block is moved into the sliding groove as a whole, and then the limiting work of the limit block on the rotating rod can be unlocked, and the rotating rod can be freely rotated to adjust the position of the fin.

[0023] Optionally, the moving part includes:

[0024] A moving rod, wherein the moving rod is slidably mounted on the mounting block, the sliding direction of the moving rod is perpendicular to the moving direction of the limit block, one end of the moving rod is located outside the mounting block, and the other end of the moving rod extends into the sliding groove;

[0025] a first moving block, which is disposed on the limiting block and located in the sliding groove;

[0026] The second moving block is arranged on one end of the moving rod located in the sliding groove and conflicts with the first moving block, and the side walls where the first moving block and the second moving block contact each other are arranged as inclined slopes. When the second moving block moves close to the first moving block, the first moving block compresses the limit spring to move.

[0027] By adopting the above technical solution, the moving rod moves into the sliding groove, the movement of the moving rod drives the second moving block to move, the movement of the second moving block drives the first moving block to move, and the movement of the first moving block drives the limit block to move into the sliding groove, thereby realizing the movement of the limit block position by controlling the moving rod.

[0028] Optionally, a plurality of heat exchange grooves are evenly distributed on the fins.

[0029] By adopting the above technical solution, a number of heat exchange grooves are opened on the fins, thereby increasing the heat exchange area of ​​the fins. The setting of the heat exchange grooves allows the fins to generate turbulence when in contact with the fluid, reducing the probability of resonance of the fins.

[0030] Optionally, the rod end of the rotating rod is covered with a heat insulation sleeve.

[0031] By adopting the above technical solution, the heat insulating sleeve is covered on the rod end of the rotating rod, thereby reducing the probability of workers being burned when rotating the rotating rod, and ensuring the health of the workers.

[0032] Optionally, a non-slip rubber pad is provided on the side wall of the limiting block that contacts the rotating rod.

[0033] By adopting the above technical solution, a non-slip rubber pad is installed on the side wall where the limit block contacts the rotating rod, thereby increasing the friction generated when the limit block and the rotating rod collide, and improving the limiting ability of the limit block on the rotating rod.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By using a rotating mechanism to control the rotation of the adjusting shaft, the rotating shaft drives the fins to rotate. By changing the position of the fins, the contact surface between the fins and the fluid is adjusted, thereby changing the natural frequency of the fins, reducing the probability of resonance caused by the matching of the fluid's hydrodynamic effect frequency, the fin frequency, and the tube body frequency, and ensuring the normal operation of the fins and tube body;

[0036] 2. Unlock the limit assembly and rotate the rotating rod. The rotation of the rotating rod drives the first bevel gear to rotate. The rotation of the first bevel gear drives the second bevel gear to rotate. The rotation of the second bevel gear drives the adjustment shaft to rotate. The rotation of the adjustment shaft drives the fin to rotate. After the fin rotates to the appropriate position, lock the limit assembly, thereby completing the rotation of the fin position.

[0037] 3. By installing an anti-slip rubber pad on the side wall where the limit block contacts the rotating rod, the friction generated when the limit block and the rotating rod collide with each other is increased, thereby improving the limiting ability of the limit block on the rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;

[0039] Figure 2 is a schematic structural diagram of the adjustment device of the present application, wherein the side wall of the mounting block is cut away;

[0040] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0041] Figure numerals: 1. tube body; 11. fin; 12. heat exchange groove; 13. rotating hole; 14. sliding groove; 15. anti-slip rubber pad; 16. thermal insulation sleeve; 2. adjusting device; 21. adjusting shaft; 22. rotating mechanism; 23. rotating rod; 24. first bevel gear; 25. second bevel gear; 26. limiting assembly; 27. mounting block; 28. limiting block; 29. ​​limiting spring; 3. moving part; 31. moving rod; 32. first moving block; 33. second moving block. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 -Attached Figure 3 This application is described in further detail.

[0043] An embodiment of the present application discloses a frequency-adjustable anti-resonance boiler fin tube.

[0044] Reference Figure 1 The frequency adjustable anti-resonance boiler fin 11 pipe includes a pipe body 1 and fins 11 arranged on the pipe body 1. A plurality of heat exchange grooves 12 are evenly distributed on the side walls of the fins 11. The pipe body 1 is provided with an adjustment device 2 for adjusting the contact surface between the fins 11 and the fluid.

[0045] Reference Figure 1 and Figure 2 The adjusting device 2 includes an adjusting shaft 21 and a rotating mechanism 22. The adjusting shaft 21 is rotatably mounted on the outer wall of the tube body 1, and the fin 11 is fixedly mounted on the adjusting shaft 21. The rotating mechanism 22 is provided on the tube body 1 and is used to drive the adjusting shaft 21 to rotate.

[0046] Reference Figure 2 and Figure 3 The rotating mechanism 22 includes a rotating rod 23, a first bevel gear 24, a second bevel gear 25 and a limit assembly 26. The rotating rod 23 is rotatably mounted on the outer wall of the tube body 1. Both ends of the rotating rod 23 are covered with a heat insulation sleeve 16. The first bevel gear 24 is fixedly mounted on the rotating rod 23. The second bevel gear 25 is fixedly mounted on the adjusting shaft 21 and meshes with the first bevel gear 24. The rotation of the rotating rod 23 drives the first bevel gear 24 to rotate, the rotation of the first bevel gear 24 drives the second bevel gear 25 to rotate, the rotation of the second bevel gear 25 drives the adjusting shaft 21 to rotate, and the rotation of the adjusting shaft 21 drives the fin 11 to rotate, so that the fin 11 can be rotated by rotating the rotating rod 23.

[0047] Reference Figure 2 and Figure 3 The limiting assembly 26 is provided on the tube body 1 and is used to limit the rotation of the rotating rod 23. The limiting assembly 26 includes a mounting block 27, a limiting block 28, a limiting spring 29 and a moving part 3. The mounting block 27 is fixedly mounted on the outer wall of the tube body 1. A rotation hole 13 is provided on the mounting block 27 along the length direction of the tube body 1, which passes through the mounting block 27. The rotating rod 23 passes through the rotation hole 13 on the mounting block 27. A sliding groove 14 is provided on the inner side wall of the rotating hole 13 in the direction of approaching or moving away from the rotating rod 23, and the limiting block 28 is slidably mounted on the sliding groove 14. The limiting spring 29 is fixedly mounted on the inner bottom wall of the sliding groove 14 and is connected to the limiting block 28. Under the action of the limiting spring 29, the limiting block 28 partially extends out of the sliding groove 14 and presses against the outer wall of the rotating rod 23. A non-slip rubber pad 15 is fixed on the side wall of the limiting block 28 on the side in contact with the rotating rod 23.

[0048] Reference Figure 2 and Figure 3The moving member 3 is arranged on the mounting block 27 and is used to drive the limit block 28 to compress the limit spring 29 to move. The moving member 3 includes a moving rod 31, a first moving block 32 and a second moving block 33. The moving rod 31 is slidably mounted on the mounting block 27. The sliding direction of the moving rod 31 is perpendicular to the moving direction of the limit block 28. One end of the moving rod 31 is located outside the mounting block 27, and the other end of the moving rod 31 extends into the sliding groove 14. The first moving block 32 is fixedly mounted on the limit block 28 and is located in the sliding groove 14. The second moving block 33 is fixedly mounted on one end of the moving rod 31 located in the sliding groove 14 and conflicts with the first moving block 32. The side walls where the first moving block 32 and the second moving block 33 contact each other are set as inclined slopes.

[0049] Reference Figure 3 When the rotating rod 23 does not need to be rotated, the limiting block 28 partially extends out of the sliding groove 14 under the action of the limiting spring 29 and presses against the outer wall of the rotating rod 23, thereby limiting the position of the rotating rod 23. When the rotating rod 23 needs to be rotated, the moving rod 31 is moved into the sliding groove 14. The movement of the moving rod 31 drives the second moving block 33 to move. The movement of the second moving block 33 drives the first moving block 32 to move. The movement of the first moving block 32 drives the limiting block 28 to move into the sliding groove 14. After the limiting block 28 is completely moved into the sliding groove 14, the limiting work of the limiting block 28 on the rotating rod 23 can be released. Then the rotating rod 23 can be freely rotated to adjust the position of the fin 11.

[0050] The working principle of the embodiment of this application is as follows:

[0051] By changing the position of the fin 11, the contact surface between the fin 11 and the fluid is adjusted, thereby changing the natural frequency of the fin 11, reducing the probability of resonance caused by the matching of the fluid dynamic effect frequency, the fin 11 frequency and the tube body 1 frequency, and ensuring that the fin 11 and the tube body 1 can work normally.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A frequency adjustable anti-resonance boiler fin (11) pipe fitting, characterized in that: The invention comprises a tube body (1) and a fin (11) arranged on the tube body (1); the tube body (1) is provided with an adjusting device (2) for adjusting the contact surface between the fin (11) and the fluid; the adjusting device (2) comprises: An adjusting shaft (21), the adjusting shaft (21) being rotatably disposed on the tube body (1), and the fin (11) being rotatably connected to the tube body (1) via the adjusting shaft (21); A rotating mechanism (22) is provided on the tube body (1) and is used to drive the adjusting shaft (21) to rotate.

2. A frequency adjustable anti-resonance boiler fin (11) pipe fitting according to claim 1, characterized in that: The rotating mechanism (22) comprises: A rotating rod (23), wherein the rotating rod (23) is rotatably arranged on the tube body (1); a first bevel gear (24), wherein the first bevel gear (24) is arranged on the rotating rod (23); a second bevel gear (25), the second bevel gear (25) being arranged on the adjustment shaft (21) and meshing with the first bevel gear (24); A limiting assembly (26) is provided on the tube body (1) and is used to limit the rotation of the rotating rod (23).

3. A frequency adjustable anti-resonance boiler fin (11) pipe fitting according to claim 2, characterized in that: The limiting component (26) includes: A mounting block (27), the mounting block (27) being arranged on the tube body (1), and the mounting block (27) being provided with a rotation hole (13) for the rotation rod (23) to pass through; A limit block (28) is provided on the inner side wall of the rotating hole (13), and a sliding groove (14) is provided along a direction close to or away from the rotating rod (23), and the limit block (28) is slidably installed on the sliding groove (14); A limit spring (29), the limit spring (29) is arranged on the inner bottom wall of the sliding groove (14) and connected to the limit block (28); under the action of the limit spring (29), the limit block (28) partially extends out of the sliding groove (14) and abuts against the outer side wall of the rotating rod (23); A moving member (3) is provided on a mounting block (27) and is used for driving a limiting block (28) to compress a limiting spring (29) to move.

4. A frequency adjustable anti-resonance boiler fin (11) pipe fitting according to claim 3, characterized in that: The moving part (3) comprises: A moving rod (31), wherein the moving rod (31) is slidably mounted on the mounting block (27), the sliding direction of the moving rod (31) is perpendicular to the moving direction of the limit block (28), one end of the moving rod (31) is located outside the mounting block (27), and the other end of the moving rod (31) extends into the sliding groove (14); a first moving block (32), the first moving block (32) being arranged on the limiting block (28) and located in the sliding groove (14); The second moving block (33) is arranged on one end of the moving rod (31) located in the sliding groove (14) and contacts the first moving block (32). The side wall where the first moving block (32) and the second moving block (33) contact each other is set as an inclined slope. When the second moving block (33) moves close to the first moving block (32), the first moving block (32) compresses the limit spring (29) to move.

5. The frequency adjustable anti-resonance boiler fin (11) pipe fitting according to claim 1, characterized in that: A plurality of heat exchange grooves (12) are evenly distributed on the fins (11).

6. A frequency adjustable anti-resonance boiler fin (11) pipe fitting according to claim 2, characterized in that: The rod end of the rotating rod (23) is covered with a heat insulation sleeve (16).

7. A frequency adjustable anti-resonance boiler fin (11) pipe fitting according to claim 3, characterized in that: An anti-slip rubber pad (15) is provided on the side wall of the limiting block (28) that contacts the rotating rod (23).

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