A tuned mass damper for a chimney

Abstract

The application discloses a chimney tuned mass damper, a hinge mechanism is arranged in the middle of the lower end of a mounting mechanism, the hinge mechanism comprises a hinge seat, a hinge shaft, a screw head, a shaft rod, a damping pad one and a threaded rod, the hinge seat is fixed on the middle of the lower end of the mounting mechanism, the upper end of a swing rod is located between the hinge seats, the hinge shaft is movably penetrated between the hinge seats, the hinge shaft is fixedly penetrated with the upper end of the swing rod, and the shaft rod bearing is connected in the hinge shaft, in the application, the chimney tuned mass damper is installed on the chimney through the mounting mechanism, and the swing rod and the mass block are located in the chimney, so that if the chimney is subjected to external force, the swing of the chimney can transmit energy to the mass block and swing, meanwhile, the mass block can generate opposite swing, the opposite swing is just different from the swing of the chimney, so that the swing of the chimney itself can be reduced, and the damping wind resistance effect is achieved, so that the external spring damping is not needed any more, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of dampers, and in particular to a tuned mass damper for chimneys. Background Technology

[0002] A chimney is a structure that provides ventilation for hot flue gas or smoke from a boiler, furnace, stove, or fireplace. Chimneys are typically vertical, or as close to vertical as possible, to ensure a smooth flow of gas. The intake of air into the so-called chimney combustion or chimney effect, the space inside the chimney, is called the flue. Chimneys can be found in buildings, steam locomotives, and ships. Because chimneys are generally tall, they are usually fitted with dampers to resist wind.

[0003] Currently, most chimney dampers are installed on the outside of the chimney to help it resist wind. Most dampers use springs for shock absorption, which means the springs are exposed to the elements for a long time, making them prone to rust and affecting their elasticity, thus affecting the service life of the damper.

[0004] To address this problem, we propose a tuned mass damper for chimneys. Summary of the Invention

[0005] The purpose of this invention is to provide a tuned mass damper for chimneys to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A tuned mass damper for a chimney includes an installation mechanism, a swing arm movably disposed at the middle of its lower end, and a mass block fixed at the lower end of the swing arm. A rotational self-locking mechanism is installed on the upper part of the installation mechanism.

[0008] A hinge mechanism is installed at the lower middle of the mounting mechanism. The hinge mechanism includes a hinge seat, a hinge shaft, a screw head, a shaft, a damping pad, and a threaded rod. There is a pair of hinge seats, which are fixed at the lower middle of the mounting mechanism. The upper end of the rocker arm is located between the hinge seats. The hinge shaft moves through the hinge seats and is fixed to the upper end of the rocker arm. The shaft is connected to the hinge shaft by a bearing. The screw head is fixed to one end of the shaft and is rotatably connected to the hinge shaft. The threaded rod is fixed to the other end of the shaft. The damping pad is located outside the threaded rod and is fixed to the hinge shaft.

[0009] A damping mechanism is fixedly installed on the outer end of one of the hinge seats. The damping mechanism is connected to a threaded rod and a damping pad. The damping mechanism includes a cover, a nut, a second damping pad, a guide rail, and a guide block. The cover is fixed to the hinge seat. The nut is located inside the cover. There is a pair of guide rails, which are fixed to the upper and lower ends of the inner wall of the cover. There is a pair of guide blocks, which are fixed to the upper and lower ends of the nut. The guide blocks are slidably connected to the guide rails. The second damping pad is fixed at the end of the nut near the first damping pad. The second damping pad is in contact with the first damping pad. The end of the threaded rod extends through the second damping pad and is threadedly connected to the nut. The end of the threaded rod is connected to the cover bearing.

[0010] In a further embodiment, the mounting mechanism includes a cross seat, a slide bar, a rack, and a clamping block. The upper end of the cross seat has a cross slide rail. There are four slide bars, which are slidably connected around the inside of the cross slide rail. The clamping block is fixed to the end of the slide bar. The rack is fixed to the inner end of the slide bar. The racks at the front and rear are symmetrically arranged, and the racks on the left and right are symmetrically arranged.

[0011] In a further embodiment, the inner wall of the cross slide has limit channels on both sides, and the slide rod has limit blocks fixed on both sides. The limit blocks are located inside the limit channels and are slidably connected to the limit channels.

[0012] In a further embodiment, a rubber bladder is bonded and fixed to the inner end of the clamping block, and the rubber bladder contains a non-Newtonian fluid.

[0013] In a further embodiment, the rotary self-locking mechanism includes a ratchet box, a rotating shaft, a handwheel, a ratchet, a toothed column, a pawl, and a spring. The ratchet box is fixed to the middle of the upper end of the cross seat, and the toothed column is located at the center of the cross slide and meshes with the rack.

[0014] In a further embodiment, the rotating shaft is rotatably connected to the center inside the ratchet box, the lower end of the rotating shaft passes through the ratchet box and is fixed to the toothed post, the ratchet is fixed outside the rotating shaft, the pawl is located behind the ratchet and is rotatably connected to the ratchet box, the pawl is connected to the ratchet, a spring is connected between the rear end of the pawl and the rear end of the inner wall of the ratchet box, and the upper end of the rotating shaft passes through the ratchet box and is fixed to the handwheel.

[0015] In a further embodiment, a pull rope is fixedly connected to the rear end of the pawl, the end of the pull rope movably passes through the rear end of the ratchet box, and the pull rope is located inside the spring.

[0016] In a further embodiment, the hinge seat is fixedly connected to the cross seat, the hinge shaft is I-shaped, the hinge shaft has a hollow internal structure, and the two ends of the hinge shaft are respectively attached to the two hinge seats.

[0017] In a further embodiment, a side plate is fixed to the left end of the inner wall of the cover and to both the upper and lower sides of the threaded rod. A guide rod is movably passed through the middle of the side plate. A damping block is fixed to the end of the guide rod. The damping block is arc-shaped and tightly attached to the threaded rod. A spring is connected between the damping block and the side plate and to the outside of the guide rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] Firstly, in this invention, the tuned mass damper is installed on the chimney through an installation mechanism, and the pendulum and mass block are located in the chimney. In this way, if the chimney is subjected to external force, the swing of the chimney will transfer energy to the mass block and swing, while the mass block will swing in the opposite direction. This opposite swing is exactly different from the swing of the chimney, so the swing of the chimney itself can be reduced, thereby playing a damping and wind-resistant role. This eliminates the need for external spring damping and improves the service life.

[0020] Secondly, in this invention, when installing the tuned mass damper onto the chimney using the installation mechanism, the cross seat is placed horizontally on the chimney exhaust port, and then the handwheel is turned. This will drive the gear column to rotate. As the gear column meshes with the four racks simultaneously, the four racks slide into the cross slide. At this time, the racks drive the slide rod to move, and the slide rod drives the clamping block to fit tightly against the outer wall of the chimney, thereby limiting and fixing the cross seat, thus making the installation of the tuned mass damper more convenient.

[0021] Thirdly, in this invention, by rotating the screw head, the threaded rod is driven to rotate through the shaft. As the threaded rod engages with the nut, the nut causes the damping pad two to come into close contact with the damping pad one. In this way, the damping coefficient of the swing arm can be adjusted by rotating the screw head, making the operation relatively convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall invention;

[0023] Figure 2 For the present invention Figure 1 A magnified view of part A;

[0024] Figure 3 This is a schematic diagram of the internal structure of the rotary self-locking mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the overall bottom surface of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified view of part B;

[0027] Figure 6 This is a schematic cross-sectional view of the damping mechanism of the present invention;

[0028] Figure 7For the present invention Figure 6 A magnified view of part C.

[0029] In the diagram: 1. Mounting mechanism; 11. Cross seat; 12. Cross slide; 13. Slide rod; 14. Rack; 15. Limiting track; 16. Limiting block; 17. Clamping block; 18. Rubber bladder; 2. Rotary self-locking mechanism; 21. Ratchet box; 22. Rotating shaft; 23. Handwheel; 24. Ratchet; 25. Toothed column; 26. Pawl; 27. Spring 1; 28. Pull rope; 3. Swing rod; 4. Mass block; 5. Hinge mechanism; 51. Hinge seat; 52. Hinge shaft; 53. Screw head; 54. Shaft; 55. Damping pad 1; 56. Threaded rod; 6. Damping mechanism; 61. Cover; 62. Nut; 63. Damping pad 2; 64. Guide rail; 65. Guide block; 66. Side plate; 67. Damping block; 68. Guide rod; 69. Spring 2. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1 - Figure 7 In this embodiment of the invention, a tuned mass damper for a chimney includes an installation mechanism 1, a swing arm 3 movably disposed at the lower middle of the mounting mechanism 1, and a mass block 4 fixed at the lower end of the swing arm 3. A rotating self-locking mechanism 2 is installed on the upper part of the installation mechanism 1. The rotating self-locking mechanism 2 includes a ratchet box 21, a rotating shaft 22, a handwheel 23, a ratchet 24, a toothed column 25, a pawl 26, and a spring 27. The rotating shaft 22 is rotatably connected to the center inside the ratchet box 21. The lower end of the rotating shaft 22 passes through the ratchet box 21 and is fixed to the toothed column 25. The ratchet 24 is fixed outside the rotating shaft 22. The pawl 26 is located behind the ratchet 24 and is rotatably connected to the ratchet box 21. The pawl 26 is connected to the ratchet 24. The spring 27 is connected between the rear end of the pawl 26 and the rear end of the inner wall of the ratchet box 21. The upper end of the rotating shaft 22 passes through the ratchet box 21 and is fixed to the handwheel 23.

[0032] In this invention, by rotating the handwheel 23 counterclockwise, the handwheel 23 will drive the rotating shaft 22 to rotate, and the rotating shaft 22 will drive the ratchet 24 and the toothed column 25 to rotate synchronously. The pawl 26 will not hinder the ratchet 24 from rotating counterclockwise, but it will hinder the ratchet 24 from rotating clockwise. In this way, the toothed column 25 will not rotate clockwise due to non-human causes.

[0033] Specifically, a pull rope 28 is fixedly connected to the rear end of the pawl 26, and the end of the pull rope 28 passes through the rear end of the ratchet box 21. The pull rope 28 is located inside the spring 27.

[0034] In this invention, when it is necessary to rotate the handwheel 23 clockwise, simply pull the pull rope 28. The pull rope 28 pulls the pawl 26 to rotate, so that the pawl 26 is no longer connected to the ratchet 24. Then, rotating the handwheel 23 clockwise will drive the ratchet 24 and the toothed column 25 to rotate synchronously.

[0035] Specifically, the installation mechanism 1 includes a cross seat 11, a slide bar 13, a rack 14, and a clamping block 17. The upper end of the cross seat 11 has a cross slide rail 12. There are four slide bars 13, which are slidably connected to the inside of the cross slide rail 12. The clamping block 17 is fixed to the end of the slide bar 13. The rack 14 is fixed to the inner end of the slide bar 13. The racks 14 at the front and rear are symmetrically arranged, and the racks 14 on the left and right are symmetrically arranged. The ratchet box 21 is fixed in the middle of the upper end of the cross seat 11. The toothed column 25 is located in the center of the cross slide rail 12 and meshes with the rack 14.

[0036] In this invention, the cross seat 11 is placed horizontally on the chimney exhaust port, and the clamping block 17 is located on the outside of the chimney, while the swing rod 3 and the mass block 4 are located on the inside of the chimney. Then, the handwheel 23 is turned counterclockwise, which will drive the toothed column 25 to rotate counterclockwise. As the toothed column 25 engages with the four toothed columns 25 at the same time, the four toothed columns 25 slide into the cross slide rail 12. At this time, the toothed column 25 drives the slide rod 13 to move, and the slide rod 13 drives the clamping block 17 to move towards the center until it is in close contact with the outer wall of the chimney, thereby limiting and fixing the cross seat 11. This makes it easier to install the tuned mass damper. If the chimney is subjected to external force, the swing of the chimney will transfer energy to the mass block 4 and swing. At the same time, the mass block 4 will swing in the opposite direction. This opposite swing is different from the swing of the chimney, so the swing of the chimney itself can be reduced, thereby playing a damping and wind-resistant role. This eliminates the need for an external spring damper and improves the service life.

[0037] Specifically, the inner wall of the cross slide 12 has limit channels 15 on both sides, and the slide rod 13 has limit blocks 16 fixed on both sides. The limit blocks 16 are located inside the limit channels 15 and are slidably connected to the limit channels 15.

[0038] In this invention, when the slide bar 13 slides inside the cross slide 12, it will drive the limiting block 16 to slide along the limiting channel 15. The setting of the limiting block 16 and the limiting channel 15 can prevent the slide bar 13 from moving vertically out of the cross slide 12.

[0039] Specifically, a rubber bladder 18 is bonded and fixed to the inner end of the clamping block 17, and the rubber bladder 18 contains a non-Newtonian fluid.

[0040] In this invention, when the clamping block 17 contacts the chimney, the rubber bladder 18 can directly contact the chimney. At this time, the rubber bladder 18 is squeezed and deformed, and the non-Newtonian fluid inside the rubber bladder 18 is squeezed. In this way, the rubber bladder 18 can also exert pressure on the chimney due to the non-Newtonian fluid, thereby improving the stability of the clamping. This can be applied to both rectangular and circular chimneys, thus improving practicality.

[0041] Specifically, a hinge mechanism 5 is installed at the lower middle of the mounting mechanism 1. The hinge mechanism 5 includes a hinge seat 51, a hinge shaft 52, a screw head 53, a shaft 54, a damping pad 55, and a threaded rod 56. There is a pair of hinge seats 51, which are fixed at the lower middle of the mounting mechanism 1. The upper end of the rocker arm 3 is located between the hinge seats 51. The hinge shaft 52 moves through the hinge seats 51 and is fixed to the upper end of the rocker arm 3. The shaft 54 ​​is bearing-connected inside the hinge shaft 52. The screw head 53 is fixed to one end of the shaft 54 ​​and is rotatably connected to the hinge shaft 52. The threaded rod 56 is fixed to the other end of the shaft 54. The damping pad 55 is located outside the threaded rod 56 and is fixed to the hinge shaft 52. The hinge seat 51 is fixedly connected to the cross seat 11. The hinge shaft 52 is I-shaped and has a hollow internal structure. The two ends of the hinge shaft 52 are respectively attached to the two hinge seats 51.

[0042] In this invention, the rocker arm 3 moves between the hinge seats 51 via the hinge shaft 52, and the hinge shaft 52 moves with the hinge seats 51. In addition, the screw head 53 can be turned with a screwdriver, and the screw head 53 will drive the shaft 54 ​​to rotate inside the hinge shaft 52 via the bearing, and the shaft 54 ​​can drive the threaded rod 56 to rotate.

[0043] Specifically, a damping mechanism 6 is fixedly installed on the outer end of one of the hinge seats 51. The damping mechanism 6 is connected to the threaded rod 56 and the first damping pad 55. The damping mechanism 6 includes a cover 61, a nut 62, a second damping pad 63, a guide rail 64, and a guide block 65. The cover 61 is fixed to the hinge seat 51. The nut 62 is located inside the cover 61. There is a pair of guide rails 64, which are fixed to the upper and lower ends of the inner wall of the cover 61 respectively. There is a pair of guide blocks 65, which are fixed to the upper and lower ends of the nut 62 respectively. The guide block 65 is slidably connected to the guide rail 64. The second damping pad 63 is fixed to the end of the nut 62 near the first damping pad 55. The second damping pad 63 is in contact with the first damping pad 55. The end of the threaded rod 56 extends through the second damping pad 63 and is threadedly connected to the nut 62. The end of the threaded rod 56 is connected to the bearing of the cover 61.

[0044] In this invention, when the threaded rod 56 rotates, it can engage with the nut 62, thereby allowing the nut 62 to move horizontally. The nut 62 also drives the guide block 65 to slide along the guide rail 64, preventing the nut 62 from rotating. This causes the nut 62 to move the second damping pad 63 closer to the first damping pad 55 until it is in close contact with the first damping pad 55. In this way, the damping coefficient of the swing rod 3 can be adjusted by rotating the screw head 53, making the operation relatively convenient.

[0045] Specifically, a side plate 66 is fixed to the left end of the inner wall of the cover 61 and on both sides above and below the threaded rod 56. A guide rod 68 is movably passed through the middle of the side plate 66. A damping block 67 is fixed to the end of the guide rod 68. The damping block 67 is arc-shaped and closely attached to the threaded rod 56. A spring 69 is connected between the damping block 67 and the side plate 66 and outside the guide rod 68.

[0046] In this invention, the damping block 67 is given an elastic force by the spring 69, so that the damping block 67 is always in close contact with the threaded rod 56, which can give the threaded rod 56 a rotational friction, thereby preventing the threaded rod 56 from rotating due to non-human causes.

[0047] The working principle of this invention is as follows: The cross seat 11 is placed horizontally on the chimney exhaust port, with the four clamping blocks 17 positioned outside the chimney, while the swing rod 3 and mass block 4 are positioned inside the chimney. Then, the handwheel 23 is turned counterclockwise, causing the gear 25 to rotate counterclockwise. As the gear 25 engages with the four gear 25 simultaneously, the four gear 25 slide into the cross slide rail 12. At this time, the gear 25 drives the slide rod 13 to move, and the slide rod 13 drives the clamping blocks 17 to move towards the center until they are in close contact with the outer wall of the chimney, thereby limiting and fixing the cross seat 11, thus installing the tuning mass. The damper is more convenient. If the chimney is subjected to external force, the chimney's swing will transfer energy to the mass block 4 and cause it to swing. At the same time, the mass block 4 will swing in the opposite direction. When the swing rod 3 moves, it drives the hinge shaft 52 to rotate. The hinge shaft 52 will drive the damping pad 55 to rotate. By making the damping pad 55 and the damping pad 63 rub against each other, a damping effect can be achieved. This opposite swing is exactly different from the chimney's swing, so the chimney's own swing can be reduced, thereby achieving a damping and wind resistance effect. This eliminates the need for an external spring damper and improves the service life.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tuned mass damper for a chimney, comprising an installation mechanism (1), a swing arm (3) movably disposed at the middle of its lower end, and a mass block (4) fixed to the lower end of the swing arm (3), characterized in that, The mounting mechanism (1) is equipped with a rotary self-locking mechanism (2) on its upper part. The mounting mechanism (1) has a hinge mechanism (5) installed at the middle of its lower end. The hinge mechanism (5) includes a hinge seat (51), a hinge shaft (52), a screw head (53), a shaft (54), a damping pad (55), and a threaded rod (56). There is a pair of hinge seats (51) and they are fixed at the middle of the lower end of the mounting mechanism (1). The upper end of the rocker arm (3) is located between the hinge seats (51). The hinge shaft (52) moves through the hinge seats (51). The hinge shaft (52) is fixed through the upper end of the rocker arm (3). The shaft (54) is connected to the hinge shaft (52) by a bearing. The screw head (53) is fixed at one end of the shaft (54). The screw head (53) is rotatably connected to the hinge shaft (52). The threaded rod (56) is fixed at the other end of the shaft (54). The damping pad (55) is located outside the threaded rod (56) and is fixed to the hinge shaft (52). A damping mechanism (6) is fixedly installed on the outer end of one of the hinge seats (51). The damping mechanism (6) is connected to the threaded rod (56) and the first damping pad (55). The damping mechanism (6) includes a cover (61), a nut (62), a second damping pad (63), a guide rail (64), and a guide block (65). The cover (61) is fixed to the hinge seat (51). The nut (62) is located inside the cover (61). There is a pair of guide rails (64) and they are fixed inside the cover (61). At the upper and lower ends of the wall, there is a pair of guide blocks (65) and they are respectively fixed at the upper and lower ends of the nut (62). The guide blocks (65) are slidably connected to the guide rail (64). The second damping pad (63) is fixed at the end of the nut (62) near the first damping pad (55). The second damping pad (63) is in contact with the first damping pad (55). The end of the threaded rod (56) extends through the second damping pad (63) and is threadedly connected to the nut (62). The end of the threaded rod (56) is connected to the bearing of the cover (61). The installation mechanism (1) includes a cross seat (11), a slide rod (13), a rack (14), and a clamping block (17). The upper end of the cross seat (11) has a cross slide rail (12). There are four slide rods (13) that are slidably connected around the inside of the cross slide rail (12). The clamping block (17) is fixed to the end of the slide rod (13). The rack (14) is fixed to the inner end of the slide rod (13). The racks (14) at the front and rear are symmetrically arranged, and the racks (14) on the left and right are symmetrically arranged. The rotating self-locking mechanism (2) includes a ratchet box (21), a rotating shaft (22), a handwheel (23), a ratchet (24), a toothed column (25), a pawl (26), and a spring (27). The ratchet box (21) is fixed to the middle of the upper end of the cross seat (11). The toothed column (25) is located at the center of the cross slide (12) and meshes with the rack (14). The rotating shaft (22) is rotatably connected to the center inside the ratchet box (21). The rotating shaft (22) is located below... The end of the ratchet box (21) is fixed to the toothed post (25). The ratchet (24) is fixed outside the rotating shaft (22). The pawl (26) is located behind the ratchet (24) and is rotatably connected to the ratchet box (21). The pawl (26) is connected to the ratchet (24). The spring (27) is connected between the rear end of the pawl (26) and the rear end of the inner wall of the ratchet box (21). The upper end of the rotating shaft (22) passes through the ratchet box (21) and is fixed to the handwheel (23).

2. A tuned mass damper for chimneys according to claim 1, characterized in that, The inner wall of the cross slide (12) has limit channels (15) on both sides, and the slide rod (13) has limit blocks (16) fixed on both sides. The limit blocks (16) are located inside the limit channels (15) and are slidably connected to the limit channels (15).

3. A tuned mass damper for chimneys according to claim 1, characterized in that, A rubber bladder (18) is bonded and fixed to the inner end of the clamping block (17), and a non-Newtonian fluid is provided inside the rubber bladder (18).

4. A tuned mass damper for chimneys according to claim 1, characterized in that, The rear end of the pawl (26) is fixedly connected to a pull rope (28), the end of the pull rope (28) is movably connected to the rear end of the ratchet box (21), and the pull rope (28) is located inside the spring (27).

5. A tuned mass damper for a chimney according to claim 1, characterized in that, The hinge seat (51) is fixedly connected to the cross seat (11). The hinge shaft (52) is I-shaped and has a hollow structure inside. The two ends of the hinge shaft (52) are respectively attached to the two hinge seats (51).

6. A tuned mass damper for a chimney according to claim 1, characterized in that, Side plates (66) are fixed to the left end of the inner wall of the cover (61) and on both sides above and below the threaded rod (56). A guide rod (68) is movably passed through the middle of the side plate (66). A damping block (67) is fixed to the end of the guide rod (68). The damping block (67) is arc-shaped and closely attached to the threaded rod (56). A spring (69) is connected between the damping block (67) and the side plate (66) and outside the guide rod (68).

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