Liquid frequency modulation damper for double-layer steel chimney

Abstract

The invention relates to the technical field of liquid frequency modulation dampers, and particularly discloses a liquid frequency modulation damper for a double-layer steel chimney, which comprises a chimney tower, an adjusting assembly is arranged on the circumferential surface of the chimney tower, and the adjusting assembly comprises two support rings fixedly mounted on the circumferential surface of the chimney tower; a mounting shell is fixedly mounted on the circumferential surface of the chimney tower, a gear ring is rotatably mounted in the mounting shell, supporting tables are rotatably mounted on the adjacent end surfaces of the two supporting rings, and tooth grooves are formed in the inner side surfaces of the adjacent ends of the multiple supporting tables on the horizontal plane; and an upper liquid box and a lower liquid box are arranged on the inner side faces of the upper supporting table and the lower supporting table correspondingly, the upper liquid box and the lower liquid box can move under the action of a stepping motor, so that liquid in the liquid box and the lower liquid box shakes to the maximum extent, the shaking frequency of the chimney is absorbed, and then the safety of the top of the chimney is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of liquid frequency modulation dampers, in particular to a liquid frequency modulation damper for a double-layer steel chimney. Background Art

[0002] The liquid frequency modulated damper is a passive energy dissipation vibration reduction device that mainly uses the dynamic lateral force generated by the liquid in the fixed water tank during the sloshing process to provide vibration reduction. When the structure is subjected to external forces such as earthquakes or wind loads, the liquid in the TLD will slosh with the vibration of the structure, forming waves, and dissipate energy through the dynamic pressure difference between its surface and the tank wall and the inertial force caused by the movement of the liquid, thereby reducing the vibration of the structure.

[0003] Due to the good effect of frequency modulation dampers, they are used in various scenes in life, such as tall chimneys in life. At present, dampers are rarely added to domestic steel chimneys. When the lateral wind load is large and the damping of the chimney is small, the top is prone to violent shaking. Therefore, in order to reduce the lateral displacement of the chimney, most domestic manufacturers use wind-breaking rings. This causes the wind load coefficient to increase, and the chimney design is not economical.

[0004] Therefore, we specially designed a liquid frequency modulation damper for double-layer steel chimneys. Summary of the invention

[0005] The purpose of the present invention is to provide a liquid frequency-modulated damper for a double-layer steel chimney. Due to the uncertainty of wind direction, when facing wind forces in different directions, the upper liquid tank and the lower liquid tank can be moved under the action of a stepper motor, so as to maximize the shaking of the internal liquid, thereby absorbing the frequency of the chimney shaking, and then ensuring the safety of the top of the chimney, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a liquid frequency modulation damper for a double-layer steel chimney, comprising a chimney tower, an adjustment assembly is provided on the circumferential surface of the chimney tower, the adjustment assembly comprises a support ring fixedly mounted on the circumferential surface of the chimney tower, and the number of the support rings is two;

[0007] A mounting shell is fixedly mounted on the circumferential surface of the chimney tower, and a gear ring is rotatably mounted inside the mounting shell;

[0008] A support platform is rotatably mounted on one adjacent end surface of the two support rings, and a tooth groove is provided on the inner side surface of one adjacent end of a plurality of the support platforms on the horizontal plane; an upper liquid tank and a lower liquid tank are respectively provided on the inner side surfaces of the upper and lower support platforms;

[0009] A transmission shaft is rotatably mounted between the two support rings, a second gear is fixedly mounted on the circumferential surface at the middle of the transmission shaft, and the second gear passes through the mounting shell and meshes with the gear ring;

[0010] Gear heads are fixedly mounted on both upper and lower ends of the transmission shaft, the gear heads are meshed with the tooth grooves, and the gear heads can drive the support platform to rotate.

[0011] Preferably,: adjacent end surfaces of the two support rings are provided with groove rings, adjacent ends of the multiple support platforms in the horizontal plane are slidably installed inside the groove rings, the upper end surface of the upper support ring is provided with a slide ring, and a rotating connecting ring is rotatably installed from the inside to the outside of the slide ring, and the lower part of the rotating connecting ring is fixedly connected to the upper end surface of the upper support platform.

[0012] Preferably, a stepper motor is fixedly mounted on the outer surface of the chimney tower, a first gear is fixedly mounted on the output shaft of the stepper motor, and the first gear passes through the mounting shell and meshes with a gear ring inside the mounting shell.

[0013] Preferably, mounting connectors are fixedly mounted on the circumferential surface of the chimney tower, the connectors are respectively fixedly connected to adjacent support rings, and the connectors are evenly distributed in a ring shape.

[0014] Preferably, cylinders are fixedly installed on adjacent end faces of the upper and lower support platforms, telescopic rods of the cylinders are fixedly connected to the adjacent upper liquid box and lower liquid box, and adjacent sides of the four support platforms on the left and right front ends are provided with installation slots, and a connecting plate is slidably installed between the left and right installation slots.

[0015] Preferably, a water pump is fixedly installed on the outer side surface of the upper liquid tank, and a hose is fixedly installed between the lower end of the water pump and the outer side surface of the lower liquid tank.

[0016] Preferably, grids are fixedly installed inside the upper liquid box and the lower liquid box, and damping balls are movably installed on the upper end surfaces of the upper liquid box and the lower liquid box.

[0017] Preferably, a liquid inlet pipe is fixedly installed on the upper end surface of the lower liquid tank, and the liquid inlet pipe is connected with the lower liquid tank. A pipe head is slidably installed inside the through hole opened on the lower end surface of the upper liquid tank, and a water outlet is opened on the upper circumferential surface of the pipe head. The upper end of the liquid inlet pipe and the lower end of the pipe head are in a fit state.

[0018] Preferably, a mounting groove is formed at the inner lower end of the upper liquid box, and spring holes are evenly formed at the inner lower end of the upper liquid box on the outer side of the mounting groove.

[0019] Preferably, a sealing cover is fixedly mounted on the upper end of the tube head, and a spring is fixedly mounted between the lower end of the sealing cover and the inner lower end surface of the spring hole.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Compared with chimneys on the market, the present invention can make the internal liquid shake under the action of the upper liquid tank and the lower liquid tank of the adjustment component, thereby reducing the shaking of the top of the chimney and avoiding the lateral displacement of the chimney; and during use, due to the uncertainty of wind direction, when facing wind forces in different directions, the upper liquid tank and the lower liquid tank can be moved under the action of the stepper motor, thereby maximally shaking the internal liquid, thereby absorbing the frequency of chimney shaking and ensuring the safety of the top of the chimney.

[0022] 2. Under the action of the upper liquid box and the lower liquid box, the present invention can allow the liquid inside the upper liquid box to enter the lower liquid box when facing a strong wind force, thereby changing the frequency of liquid shaking, and thus being able to have better absorption when facing a strong wind force.

[0023] 3. The present invention, under the action of the upper liquid tank, the lower liquid tank, the hose, the water pump and other structures, can enable the damping device to be in a variety of unloading conditions when facing smaller wind forces, so that the chimney is not limited to only one damping operation when facing wind forces.

[0024] 4. The present invention can change the frequency of liquid sloshing during the sloshing process under the action of structures such as grids and damping balls, thereby further increasing the energy absorbed by the liquid to ensure the safety of the chimney. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a front view of the main body of the present invention;

[0027] Figure 2 It is a schematic diagram of the upper and lower support platforms of the present invention;

[0028] Figure 3 It is a schematic diagram of the gear ring and the support ring of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 It is a structural diagram of the support platform of the present invention;

[0031] Figure 6 It is a schematic diagram of the upper liquid box and the lower liquid box of the present invention;

[0032] Figure 7 It is a schematic diagram of the interior of the upper liquid box and the lower liquid box of the present invention;

[0033] Figure 8 It is a schematic diagram of the upper liquid box and the lower liquid box of the present invention;

[0034] Description of reference numerals:

[0035] 1. Chimney tower;

[0036] 40. Adjustment assembly; 2. Connector; 3. Support ring; 31. Slide ring; 32. Rotating connecting ring; 33. Groove ring; 4. Mounting shell; 41. Gear ring; 5. Stepper motor; 51. First gear; 6. Second gear; 7. Transmission shaft; 8. Gear head; 9. Support platform; 10. Tooth groove; 11. Cylinder; 12. Mounting slot; 13. Connecting plate; 14. Upper liquid tank; 15. Lower liquid tank; 16. Water pump; 17. Hose; 18. Grid; 19. Damping ball; 20. Liquid inlet pipe; 21. Pipe head; 22. Water outlet; 23. Sealing cover; 24. Mounting slot; 25. Spring hole; 26. Spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 5 , the present invention provides a technical solution:

[0039] A liquid frequency modulation damper for a double-layer steel chimney, comprising a chimney tower 1, an adjustment assembly 40 is provided on the circumferential surface of the chimney tower 1, the adjustment assembly 40 comprises a support ring 3 fixedly mounted on the circumferential surface of the chimney tower 1, and the number of the support rings 3 is two; a mounting shell 4 is fixedly mounted on the circumferential surface of the chimney tower 1, and a gear ring 41 is rotatably mounted inside the mounting shell 4; support platforms 9 are rotatably mounted on adjacent end surfaces of two of the support rings 3, and tooth grooves 10 are provided on the inner side surfaces of adjacent ends of a plurality of the support platforms 9 on a horizontal plane; an upper liquid tank 14 and a lower liquid tank 15 are respectively provided on the inner side surfaces of the upper and lower support platforms 9; a transmission shaft 7 is rotatably mounted between the two support rings 3, a second gear 6 is fixedly mounted on the circumferential surface of the middle position of the transmission shaft 7, and the second gear 6 passes through the mounting shell 4 and meshes with the gear ring 41; gear heads 8 are fixedly mounted on the upper and lower ends of the transmission shaft 7, and the gear heads 8 mesh with the tooth grooves 10, and the gear heads 8 can drive the support platform 9 to rotate.

[0040] A groove ring 33 is provided on the adjacent end faces of the two support rings 3, and adjacent ends of the multiple support platforms 9 in the horizontal plane are slidably installed inside the groove ring 33. A slide groove ring 31 is provided on the upper end face of the upper support ring 3, and a rotating connecting ring 32 is rotatably installed from the inside to the outside of the slide groove ring 31, and the lower part of the rotating connecting ring 32 is fixedly connected to the upper end face of the upper support platform 9; a stepper motor 5 is fixedly installed on the outer surface of the chimney tower 1, and a first gear 51 is fixedly installed on the output shaft of the stepper motor 5, and the first gear 51 passes through the mounting shell 4 and meshes with the gear ring 41 inside it.

[0041] A mounting connector 2 is fixedly installed on the circumferential surface of the chimney tower 1, and the connector 2 is fixedly connected to the adjacent support rings 3 respectively. The connector 2 is evenly distributed in a ring shape. A cylinder 11 is fixedly installed on the adjacent end surface of the upper and lower support platforms 9. The telescopic rod of the cylinder 11 is fixedly connected to the adjacent upper liquid tank 14 and lower liquid tank 15. An installation slot 12 is opened on the adjacent side of the four support platforms 9 on the left and right sides of the front end, and a connecting plate 13 is slidably installed between the left and right installation slots 12.

[0042] By adopting the above technical solution, including the chimney tower 1, an adjustment component 40 is fixedly installed on the circumferential surface of the chimney tower 1, which is used to reduce the shaking of the top of the chimney tower 1 when facing lateral wind force, thereby avoiding the chimney tower 1 from collapsing.

[0043] A plurality of connecting members 2 of annular structure are fixedly mounted on the circumferential surface of the chimney tower 1, and a support ring 3 is fixedly mounted on adjacent ends of the connecting members 2, wherein adjacent end surfaces of two support rings 3 are provided with groove rings 33 for mounting subsequent support platforms 9.

[0044] During use, the adjacent ends of the support platforms 9 on the same horizontal plane are slidably installed into the interior of the groove ring 33 in sequence. It should be noted that there are five support platforms 9 on the same horizontal plane, and the inner angle of each support platform 9 is sixty degrees, so a sixty-degree fan-shaped area will be vacant. In order to avoid the support platforms 9 from being separated during the subsequent rotation, installation slots 12 are opened on the support platforms 9 on both sides of the vacant positions, and a connecting plate 13 is slidably installed between the two installation slots 12 for combining into a complete annular structure, so that multiple support platforms 9 can fit closely together without loosening, thereby ensuring the stability of subsequent operations.

[0045] In addition, a slide groove ring 31 is provided on the upper end surface of the upper support ring 3, and a rotating connecting ring 32 with an L-shaped structure is slidably installed inside the slide groove ring 31, and the outer lower end of the rotating connecting ring 32 can be welded together with the adjacent support platform 9 to ensure that the upper support platform 9 will not fall off.

[0046] Then, when facing the crosswind, according to the local weather report and the wind flow, the stepper motor 5 is started, and the output shaft of the stepper motor 5 will rotate synchronously with the first gear 51, and the gear ring 41 installed inside the mounting shell 4 will rotate synchronously under the drive of the first gear 51.

[0047] At this time, the gear ring 41 will drive the three second gears 6 to rotate in one direction. It should be noted that four arc-shaped through holes are opened on the circumferential surface of the mounting shell 4 to allow the gear ring 41 to mesh with the first gear 51 and the second gear 6.

[0048] When the second gear 6 rotates, it will rotate synchronously with the transmission shaft 7. At this time, the transmission shaft 7 will rotate synchronously with the gear heads 8 at both ends. During the rotation of the gear head 8, due to the tooth groove 10 core opened on the inner side of the support platform 9, the gear head 8 can drive the multiple support platforms 9 combined together to rotate. During the rotation of the support platform 9, it will rotate synchronously with the internal cylinder 11, and the cylinder 11 will rotate synchronously with the fixedly connected upper liquid tank 14 and lower liquid tank 15, so as to change the position of the upper liquid tank 14 and the lower liquid tank 15, so that the ladder originally facing the wind can be placed with its back to the wind, and the upper liquid tank 14 and the lower liquid tank 15 can be made to face the wind, thereby changing the shaking of the liquid inside the upper liquid tank 14 and the lower liquid tank 15, thereby ensuring the safety of the top of the chimney.

[0049] Specifically, Figures 7 and 8As shown, a cylinder 11 is fixedly installed on the adjacent end faces of the upper and lower support platforms 9, and the telescopic rods of the cylinder 11 are fixedly connected to the adjacent ends of the adjacent upper liquid tank 14 and the lower liquid tank 15. An installation slot 12 is opened on the adjacent sides of the two support platforms 9 on the front end, and a connecting plate 13 is slidably installed between the installation slots 12.

[0050] A water pump 16 is fixedly installed on the outer surface of the upper liquid tank 14, and a hose 17 is fixedly installed between the lower end of the water pump 16 and the outer surface of the lower liquid tank 15. A grid 18 is fixedly installed inside the upper and lower liquid tanks 14, 15. Damping balls 19 are swingably installed on the upper end surfaces of the upper and lower liquid tanks 14, 15. A liquid inlet pipe 20 is fixedly installed on the upper end surface of the lower liquid tank 15, and the liquid inlet pipe 20 is connected with the lower liquid tank 15. A pipe head 21 is slidably installed inside the through hole provided in the lower end surface of the upper liquid tank 14, and a water outlet 22 is provided on the upper circumferential surface of the pipe head 21. The upper end of the liquid inlet pipe 20 is in a fit with the lower end of the pipe head 21.

[0051] A mounting groove 24 is provided at the inner lower end of the upper liquid box 14 , and spring holes 25 are evenly provided at the inner lower end of the upper liquid box 14 on the outside of the mounting groove 24 . A sealing cover 23 is fixedly installed at the upper end of the pipe head 21 , and a spring 26 is fixedly installed between the lower end of the sealing cover 23 and the inner lower end surface of the spring hole 25 .

[0052] By adopting the above technical solution, including the upper liquid box 14 and the lower liquid box 15, a grid 18 is fixedly installed inside the upper liquid box 14 and the lower liquid box 15 to change the shaking frequency of the liquid inside, so as to better absorb the shaking of the chimney top facing the lateral wind.

[0053] Then, a damping ball 19 is fixedly installed on the upper end surface of the upper liquid tank 14 and the lower liquid tank 15 using a cable made of flexible material. During the shaking of the liquid inside the upper liquid tank 14 and the lower liquid tank 15, the damping ball 19 can further change the frequency of the liquid shaking, so that the overall damping device can better absorb the shaking of the chimney, thereby ensuring the safety of the chimney.

[0054] In addition, during use, due to the need to face different levels of lateral wind, the cylinder 11 can gradually move the adjacent ends of the upper liquid tank 14 and the lower liquid tank 15 closer to each other under the action of the cylinder 11.

[0055] At this time, the liquid inlet pipe 20 at the upper end of the lower liquid tank 15 will push the tube head 21 to slide upward. During the upward sliding process of the tube head 21, the water outlet 22 opened on its circumferential surface will be in a through state with the interior of the upper liquid tank 14. At this time, the liquid in the upper liquid tank 14 will pass through the water outlet 22 into the interior of the tube head 21, and then flow into the liquid inlet pipe 20, and finally enter the interior of the lower liquid tank 15, thereby changing the weight of the liquid in the lower liquid tank 15.

[0056] In addition, when the tube head 21 slides upward, it will carry the sealing cover 23, and the sealing cover 23 will slide synchronously with the spring 26. When the upper liquid tank 14 and the lower liquid tank 15 are reset, the spring 26 will carry the sealing cover 23 to slide downward synchronously, and the spring 26 will shrink to the inside of the spring hole 25, thereby preventing the spring 26 from affecting the lower end of the sealing cover 23 from sliding to the inside of the mounting groove 24. With the cooperation of the sealing cover 23 and the mounting groove 24, the liquid inside the upper liquid tank 14 will not flow out on its own. At this time, the upper end of the liquid inlet pipe 20 is always located inside the tube head 21, thereby preventing external impurities from contaminating the liquid inside the liquid tank.

[0057] In addition, after the large lateral wind ends, the maintenance personnel can start the water pump 16 to allow the liquid in the lower liquid tank 15 to enter the hose 17 and then return to the upper liquid tank 14 so that the liquid in the upper liquid tank 14 and the lower liquid tank 15 maintain the same weight; therefore, with the cooperation of the above-mentioned multiple structures, the weight of the liquid in the lower liquid tank 15 can be changed to cope with large lateral winds, so that the overall damping effect can be further increased under the action of multiple layers of liquid; in addition, the safety of the chimney can be guaranteed under the action of the above-mentioned multiple structures.

[0058] Working principle: First, start the stepper motor 5, and the output shaft of the stepper motor 5 drives the first gear 51 to rotate, so that the second gear 6 can rotate synchronously with the transmission shaft 7, and then the gear head 8 can drive the combined support platform 9 to rotate synchronously, thereby changing the positions of the upper liquid tank 14 and the lower liquid tank 15.

[0059] Then, start the upper and lower cylinders 11 to gradually move the adjacent ends of the upper liquid tank 14 and the lower liquid tank 15 closer together. At this time, the liquid inlet pipe 20 can push the pipe head 21 to slide, so that the liquid inside the upper liquid tank 14 can pass through the water outlet 22 into the lower liquid tank 15.

[0060] Finally, under the action of the water pump 16 , half of the liquid in the lower liquid tank 15 can return to the upper liquid tank 14 to ensure the operating effect of the upper liquid tank 14 .

[0061] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid frequency modulation damper for a double-layer steel chimney, comprising a chimney tower (1), characterized in that: An adjustment assembly (40) is provided on the circumferential surface of the chimney tower (1), and the adjustment assembly (40) comprises a support ring (3) fixedly mounted on the circumferential surface of the chimney tower (1), and the number of the support rings (3) is two; A mounting shell (4) is fixedly mounted on the circumferential surface of the chimney tower (1), and a gear ring (41) is rotatably mounted inside the mounting shell (4); A support platform (9) is rotatably mounted on one adjacent end surface of the two support rings (3); a tooth groove (10) is provided on the inner side surface of one adjacent end of a plurality of the support platforms (9) on a horizontal plane; an upper liquid box (14) and a lower liquid box (15) are respectively provided on the inner side surfaces of the upper and lower support platforms (9); A transmission shaft (7) is rotatably mounted between the two support rings (3); a second gear (6) is fixedly mounted on a circumferential surface at a middle position of the transmission shaft (7); the second gear (6) passes through the mounting shell (4) and meshes with the gear ring (41); Gear heads (8) are fixedly mounted on both upper and lower ends of the transmission shaft (7), the gear heads (8) are meshed with tooth grooves (10), and the gear heads (8) can drive the support platform (9) to rotate.

2. The liquid frequency modulation damper for a double-layer steel chimney according to claim 1 is characterized in that: A groove ring (33) is provided on the adjacent end faces of the two support rings (3); adjacent ends of the plurality of support platforms (9) in the horizontal plane are slidably mounted inside the groove ring (33); a slide groove ring (31) is provided on the upper end face of the upper support ring (3); a rotating connecting ring (32) is rotatably mounted from the inside to the outside of the slide groove ring (31); and the lower part of the rotating connecting ring (32) is fixedly connected to the upper end face of the upper support platform (9).

3. The liquid frequency modulation damper for a double-layer steel chimney according to claim 1 is characterized in that: A stepper motor (5) is fixedly mounted on the outer surface of the chimney tower (1), and a first gear (51) is fixedly mounted on the output shaft of the stepper motor (5). The first gear (51) passes through the mounting shell (4) and meshes with a gear ring (41) inside the mounting shell.

4. The liquid frequency modulation damper for a double-layer steel chimney according to claim 1 is characterized in that: A mounting connector (2) is fixedly mounted on the circumferential surface of the chimney tower (1), the connector (2) being respectively fixedly connected to adjacent support rings (3), and the connector (2) is evenly distributed in a ring shape.

5. The liquid frequency modulation damper for a double-layer steel chimney according to claim 4 is characterized in that: A cylinder (11) is fixedly installed on the adjacent end surface of the upper and lower support platforms (9), and the telescopic rods of the cylinder (11) are fixedly connected to the adjacent upper liquid box (14) and lower liquid box (15). An installation slot (12) is opened on the adjacent side of the four support platforms (9) on the left and right sides of the front end, and a connecting plate (13) is slidably installed between the two left and right installation slots (12).

6. The liquid frequency modulation damper for a double-layer steel chimney according to claim 5 is characterized in that: A water pump (16) is fixedly installed on the outer side surface of the upper liquid box (14), and a hose (17) is fixedly installed between the lower end of the water pump (16) and the outer side surface of the lower liquid box (15).

7. The liquid frequency modulation damper for a double-layer steel chimney according to claim 5 is characterized in that: A grid (18) is fixedly installed inside the upper liquid box (14) and the lower liquid box (15), and a damping ball (19) is movably installed on the upper end surface of the upper liquid box (14) and the lower liquid box (15).

8. The liquid frequency modulation damper for a double-layer steel chimney according to claim 1 is characterized in that: A liquid inlet pipe (20) is fixedly mounted on the upper end surface of the lower liquid box (15), and the liquid inlet pipe (20) is in communication with the lower liquid box (15). A pipe head (21) is slidably mounted inside a through hole provided on the lower end surface of the upper liquid box (14), and a water outlet (22) is provided on the upper circumferential surface of the pipe head (21). The upper end of the liquid inlet pipe (20) is in a fitted state with the lower end of the pipe head (21).

9. The liquid frequency modulation damper for a double-layer steel chimney according to claim 1 is characterized in that: The lower inner end of the upper liquid box (14) is provided with a mounting groove (24), and the lower inner end of the upper liquid box (14) is evenly provided with spring holes (25) located outside the mounting groove (24).

10. The liquid frequency modulation damper for a double-layer steel chimney according to claim 8, characterized in that: A sealing cover (23) is fixedly mounted on the upper end of the pipe head (21), and a spring (26) is fixedly mounted between the lower end of the sealing cover (23) and the inner lower end surface of the spring hole (25).

Images