A replaceable metal damper anti-sway point for chimney suspension type steel inner cylinder

Abstract

This invention discloses a replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney, comprising a metal damper, an outer chimney cylinder, and an inner chimney cylinder; an anti-sway platform component is provided between the outer chimney cylinder and the inner chimney cylinder, and the anti-sway platform component includes a chimney anti-sway platform beam disposed on the inner side of the outer chimney cylinder and anti-sway platform beam side plates fixedly connected to the chimney anti-sway platform beam. This invention relates to the field of chimney technology for thermal power plants. This replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney effectively reduces the chimney's seismic response by using a metal damper as the anti-sway point for the steel inner chimney, thereby saving engineering work and reducing engineering costs. Simultaneously, the metal damper is replaceable, easy to maintain, and has low maintenance costs. Furthermore, by providing polytetrafluoroethylene plates at the ends and sides of the metal damper, the friction with the chimney anti-sway platform beam is reduced.

Description

Technical Field

[0001] This invention relates to the field of chimney technology for thermal power plants, specifically to a replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney. Background Technology

[0002] After wet desulfurization of flue gas in thermal power plants, the flue gas entering the chimney is in a low-temperature and humid state, which actually enhances its corrosiveness. Therefore, large thermal power plant chimneys consist of an outer cylinder and one or more inner cylinders. This reduces or avoids direct contact between the flue gas and the outer cylinder, improving the chimney's corrosion resistance and safety performance. To ensure the stability of the inner flue gas cylinder, large thermal power plant chimneys typically install anti-sway platforms at different heights. These anti-sway platforms are composed of steel beams erected on the outer cylinder. The inner flue gas cylinder is connected to the outer cylinder through anti-sway points and anti-sway platforms, thus limiting the swaying and horizontal displacement of the inner flue gas cylinder. Currently, most anti-sway platforms and anti-sway points used in chimneys are rigid. The dynamic response generated by swaying vibrations is large, resulting in poor seismic performance of the chimney. The anti-sway platforms also consume a large amount of steel, affecting the overall economic efficiency of the chimney. Rigid anti-sway points exert a large reaction force on the steel inner cylinder, which can easily cause deformation of the steel cylinder.

[0003] To address these issues, existing technologies also utilize viscous dampers at anti-sloshing points. A viscous damper is a velocity-dependent damper that uses the vibration of an external structure to drive the movement of a piston rod, causing the internal viscous fluid to flow. The friction between the viscous fluid and the damping orifice achieves energy dissipation and vibration reduction. However, viscous dampers are highly susceptible to environmental temperature fluctuations, are prone to leakage, and are difficult to disassemble for maintenance, resulting in low maintenance efficiency. Furthermore, viscous dampers are expensive to manufacture and maintain. Using oil-based fluids in viscous dampers may also lead to insufficient fire resistance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney, comprising a metal damper, an outer cylinder of the chimney, and an inner cylinder of the chimney.

[0006] An anti-sway platform component is provided between the outer and inner cylinders of the chimney.

[0007] The anti-sway platform component is used to connect the metal damper between the outer and inner cylinders of the chimney via a limiting connection component and / or a detachable connection component.

[0008] The limiting connection member and / or the detachable connection member are used to install the metal damper.

[0009] As a further aspect of the present invention: the anti-sway platform component includes an anti-sway platform beam disposed on the inner side of the chimney outer cylinder and an anti-sway platform beam side plate fixedly connected to the chimney anti-sway platform beam.

[0010] The anti-sway platform component also includes an inner cylinder reinforcing ring welded to the outside of the chimney inner cylinder.

[0011] As a further aspect of the present invention: the limiting connection component includes a limiting cover plate and connecting bolts, specifically: one side of the metal damper is fixedly connected to the outer side of the inner cylinder reinforcing ring by connecting bolts, the side plate of the anti-sway platform beam away from the chimney anti-sway platform beam is fixedly connected to the limiting cover plate, and the other side of the metal damper is located inside the limiting cover plate.

[0012] As a further aspect of the present invention: when installing a metal damper through a limiting connection member, a polytetrafluoroethylene plate is fixedly connected to the other end and side of the metal damper by countersunk screws and enclosing square steel.

[0013] As a further aspect of the present invention: the detachable connecting component includes two damper enclosure bases, one side of which is provided with a damper mounting groove, and the other side of which is provided with an adjustment chamber, and the front side of which is provided with a transmission chamber.

[0014] As a further aspect of the present invention: the upper and lower parts of the inner side of the adjustment chamber are rotatably connected to a rotating shaft, and a convex roller is fixedly connected to the outer side of the rotating shaft. A pushing assembly is provided on one side of the convex roller in contact with it, and the pushing assembly includes an inner push plate, a slide rod and an outer push plate. The two ends of the slide rod pass through the adjustment chamber and the damper mounting groove respectively, and the inner push plate and the outer push plate are fixedly connected to the two ends of the slide rod respectively. An auxiliary slide roller is rotatably connected to the side of the inner push plate and the outer push plate away from the slide rod, and the outer side of the convex roller is in contact with the auxiliary slide roller at the inner push plate.

[0015] As a further aspect of the present invention: one end of the rotating shaft extends through the transmission chamber, and the rotating shaft located inside the transmission chamber is also fixedly connected to a ratchet. The inner side of the transmission chamber is rotatably connected to a ratchet tooth, and the ratchet tooth engages with the outer side of the ratchet.

[0016] As a further embodiment of the present invention: a bevel gear one is fixedly connected to the rotating shaft located inside the transmission chamber, a rotating cylinder is rotatably connected to the inner side of the transmission chamber, and a bevel gear two is fixedly connected to one end of the rotating cylinder, and the bevel gear two meshes with the bevel gear one for transmission.

[0017] The inner side of the rotating cylinder has a square structure, and a set of square rods runs through one end of the rotating cylinder at the base of the two damper plates, and the square rods slide within the rotating cylinder.

[0018] As a further aspect of the present invention: one end of a rotating shaft in the damper enclosure base extends to the outside of the damper enclosure base, and the end of the rotating shaft is connected to a hexagonal bolt head through a torque amplifier;

[0019] Rigid rotating seats are rotatably connected to the other side of both damper enclosure bases. The rigid rotating seat at one damper enclosure base is fixedly connected to the side plate of the anti-sway platform beam by bolts, and the rigid rotating seat at the other damper enclosure base is fixedly connected to the inner cylinder reinforcing ring by bolts.

[0020] A limiting slide is fixedly connected to the bottom of one of the damper enclosure bases, and the bottom of the other damper enclosure base is slidably connected to the limiting slide.

[0021] As a further aspect of the present invention: when installing the metal damper using a detachable connecting component, the two ends and sides of the metal damper are all fixedly connected with polytetrafluoroethylene plates by countersunk screws and enclosing square steel.

[0022] This invention provides a replaceable metal damper for preventing swaying in suspended steel inner cylinders of chimneys. Compared with existing technologies, it has the following advantages:

[0023] This invention uses a metal damper as the anti-sway point of the steel inner cylinder of the chimney, which can effectively reduce the seismic response of the chimney, thereby saving engineering work and reducing engineering costs. At the same time, the metal damper and the steel inner cylinder reinforcement ring are connected by bolts, which can be replaced, making maintenance convenient and cost-effective.

[0024] This invention reduces friction with the chimney sway-prevention platform beam by installing polytetrafluoroethylene (PTFE) plates at the ends and sides of the metal damper; the PTFE plates are fixed with countersunk screws to prevent them from falling off, and the metal damper can be protected by using enclosed square steel, thus extending its service life.

[0025] This invention utilizes easily detachable connecting components to enable rapid disassembly of metal dampers, further improving the maintenance and management efficiency of chimneys, making maintenance more convenient for managers, increasing operational efficiency, and saving replacement time. Attached Figure Description

[0026] Figure 1 This is a top sectional view of the structure of the present invention;

[0027] Figure 2 This is a main sectional view of the anti-sway point structure of the present invention;

[0028] Figure 3For the present invention Figure 2 Structural cross-sectional view at point AA;

[0029] Figure 4 For the present invention Figure 3 Structural cross-sectional view at point BB;

[0030] Figure 5 This is a top sectional view of the detachable connecting component of the present invention;

[0031] Figure 6 This is a main sectional view of the detachable connecting component of the present invention;

[0032] Figure 7 For the present invention Figure 5 A magnified view of a section at point C;

[0033] Figure 8 For the present invention Figure 6 A magnified view of a section at point D.

[0034] In the diagram: 1. Metal damper; 2. Chimney inner cylinder; 3. Chimney anti-sway platform beam; 4. Chimney outer cylinder; 5. Inner cylinder reinforcing ring; 6. Limiting cover plate; 7. Anti-sway platform beam side plate; 8. PTFE plate; 9. Countersunk screw; 10. Enclosing square steel; 11. Connecting bolt; 12. Damper enclosure base; 13. Damper mounting groove; 14. Adjustment chamber; 15. Transmission chamber; 151. Ratchet; 152. Rotating cylinder; 153. Bevel gear II; 16. Rotating shaft; 161. Convex roller; 162. Ratchet; 163. Bevel gear I; 17. Pushing assembly; 171. Inner push plate; 172. Slide rod; 173. Outer push plate; 174. Auxiliary slide roller; 19. Hexagonal bolt head; 20. Rigid rotating seat; 21. Limiting slide plate. Detailed Implementation

[0035] 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.

[0036] Example 1

[0037] Please see Figures 1-5 The present invention provides a technical solution: a replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney, comprising: a metal damper 1, an outer cylinder of the chimney 4 and an inner cylinder of the chimney 2.

[0038] An anti-sway platform component is provided between the outer casing 4 and the inner casing 2 of the chimney, and the anti-sway platform component includes a chimney anti-sway platform beam 3 provided on the inner side of the outer casing 4 and an anti-sway platform beam side plate 7 fixedly connected to the chimney anti-sway platform beam 3.

[0039] The anti-sway platform components also include an inner cylinder reinforcing ring 5 welded to the outside of the inner cylinder 2 of the chimney;

[0040] The metal damper 1 is installed on the anti-sway platform component through a limiting connection component. The limiting connection component includes a limiting cover plate 6 and a connecting bolt 11. Specifically, one side of the metal damper 1 is fixedly connected to the outer side of the inner cylinder reinforcing ring 5 through the connecting bolt 11. The side of the anti-sway platform beam 7 away from the chimney anti-sway platform beam 3 is fixedly connected to the limiting cover plate 6, and the other side of the metal damper 1 is located inside the limiting cover plate 6.

[0041] The working principle of this embodiment is as follows:

[0042] First, construction machinery is used to construct the outer casing 4 of the chimney to a certain height. Holes or corbels are reserved on the outer casing 4 of the chimney. The chimney anti-sway platform beam 3 is supported at the opening or corbel of the outer casing 4 of the chimney to form the chimney anti-sway platform.

[0043] Subsequently, the anti-sway platform beam side plate 7 was welded onto the chimney anti-sway platform beam 3, and the limiting cover plate 6 was connected to the anti-sway platform beam side plate 7 by connecting bolts 11.

[0044] The inner cylinder steel plate is then transported to the designated location and processed into the chimney inner cylinder 2 through processes such as cutting, rolling, and welding. The inner cylinder reinforcing ring 5 is welded to the designed position of the chimney inner cylinder 2. Each section of steel cylinder is about a few meters long. The sections of steel cylinder are connected by hoisting or air-filled jacking and gradually raised to the designed position.

[0045] Then, the metal damper 1 is fixed to the designed position of the inner cylinder reinforcing ring 5 by connecting bolts 11.

[0046] In this embodiment, the anti-sway point of the chimney's steel inner cylinder is a metal damper 1, which can effectively reduce the chimney's seismic response, thereby saving engineering work and reducing engineering costs. At the same time, the metal damper 1 and the steel inner cylinder reinforcement ring 5 are connected by bolts, which can be replaced, making maintenance convenient and cost-effective.

[0047] Example 2

[0048] As a second embodiment of the present invention, in specific implementation, the technical solution of this embodiment differs from that of embodiment one only in that:

[0049] In this embodiment, the end and side of the metal damper 1 are fixedly connected to a polytetrafluoroethylene plate 8 by countersunk screws 9 and enclosing square steel 10.

[0050] In this embodiment, polytetrafluoroethylene (PTFE) plates 8 are provided at the ends and sides of the metal damper 1 to reduce the friction with the chimney anti-sway platform beam 3. The PTFE plates 8 are fixed with countersunk screws 9 to prevent them from falling off. The metal damper 1 can be protected by enclosing square steel 10, thus extending the service life of the metal damper 1.

[0051] Example 3

[0052] As a third embodiment of the present invention, in specific implementation, the technical solution of this embodiment differs from that of embodiment one in that:

[0053] In this embodiment, the limiting connecting component in Embodiment 1 is replaced with a detachable connecting component;

[0054] The detachable connection component includes two damper enclosure bases 12. One side of the damper enclosure base 12 is provided with a damper mounting groove 13, and the other side of the damper enclosure base 12 is provided with an adjustment chamber 14. The front side of the damper enclosure base 12 is provided with a transmission chamber 15.

[0055] The damper mounting slot 13 is divided into a placement slot, a transition slot, and a fixing slot from top to bottom;

[0056] The upper and lower parts of the inner side of the adjustment chamber 14 are rotatably connected to the rotating shaft 16, and the outer side of the rotating shaft 16 is fixedly connected to the convex roller 161. A pushing assembly 17 is provided on one side of the convex roller 161 in contact with it. The pushing assembly 17 includes an inner push plate 171, a slide rod 172 and an outer push plate 173. The two ends of the slide rod 172 pass through the adjustment chamber 14 and the damper mounting groove 13 respectively. The inner push plate 171 and the outer push plate 173 are fixedly connected to the two ends of the slide rod 172 respectively. The side of the inner push plate 171 and the outer push plate 173 away from the slide rod 172 is rotatably connected to the auxiliary slide roller 174. The outer side of the convex roller 161 is in contact with the auxiliary slide roller 174 at the inner push plate 171.

[0057] One end of the rotating shaft 16 extends through the transmission chamber 15, and the rotating shaft 16 located inside the transmission chamber 15 is also fixedly connected to a ratchet 162 and a bevel gear 163; in this example, the rotational connection position of the rotating shaft 16 is connected by a damped rotational structure.

[0058] The inner side of the transmission chamber 15 is rotatably connected to a ratchet 151 and a rotating cylinder 152. The ratchet 151 meshes with the outer side of the ratchet 162. One end of the rotating cylinder 152 is fixedly connected to a bevel gear 153, and the bevel gear 153 meshes with the bevel gear 163 for transmission.

[0059] The inner side of the rotating cylinder 152 has a square structure. A set of square rods runs through one end of the rotating cylinder 152 at the base 12 of the two damper plates, and the square rods slide within the inner side of the rotating cylinder 152.

[0060] One end of a rotating shaft 16 in a damper enclosure base 12 extends to the outside of the damper enclosure base 12, and the end of the rotating shaft 16 is connected to a hexagonal bolt head 19 via a torque amplifier.

[0061] Rigid rotating seats 20 are rotatably connected to the other side of the two damper enclosure bases 12. The rigid rotating seat 20 at one damper enclosure base 12 is fixedly connected to the anti-sway platform beam side plate 7 by connecting bolts 11, and the rigid rotating seat 20 at the other damper enclosure base 12 is fixedly connected to the inner cylinder reinforcing ring 5 by connecting bolts 11.

[0062] The placement slot is used to shrink and adjust the metal damper 1 before installation, which solves the problem that the metal damper 1 is in a relaxed state and is not easy to place.

[0063] The transition groove is used to assist the metal damper 1 in moving from the placement groove into the fixing groove after it is installed in the placement groove. At the same time, the transition groove is mainly used to limit the metal damper 1 placed in the fixing groove, so that the metal damper 1 is installed firmly and stably.

[0064] The fixing groove is used to install the metal damper 1 between the outer casing 4 and the inner casing 2 of the chimney;

[0065] The bottom of one damper enclosure base 12 is fixedly connected to a limiting slide plate 21, and the bottom of the other damper enclosure base 12 is slidably connected to the limiting slide plate 21.

[0066] The working principle of this embodiment is as follows:

[0067] Based on the working principle of Embodiment 1, this embodiment replaces the limiting connecting component with a detachable connecting component; one rigid rotating seat 20 of the detachable connecting component is fixed to the side plate 7 of the anti-sway platform beam by connecting bolts 11, and the other rigid rotating seat 20 is fixed to the inner cylinder reinforcing ring 5 by connecting bolts 11.

[0068] The function of the metal damper 1 is to reduce vibration and dissipate energy through deformation. When the corresponding metal damper 1 is removed, the maintenance personnel first use a ratchet wrench corresponding to the size of the hexagonal bolt head 19 to rotate the hexagonal bolt head 19 located at the lower front side of the damper enclosure base 12. During the rotation, the torque amplifier transmits the torque applied by the maintenance personnel to the rotating shaft 16. Then the rotating shaft 16 drives the cam roller 161 to rotate, so that the pushing component 17, which was originally in contact with the short convex surface of the cam roller 161, changes to the pushing component 17 contacting the long convex surface of the cam roller 161. Then the pushing component 17 moves towards the damper mounting groove 13, thereby causing the metal damper 1 to be removed to deform and shrink. At the same time, the ratchet 151 limits the ratchet 162, so that the rotating shaft 16 will not rotate due to the thrust generated after the deformation of the metal damper 1.

[0069] When the width of the deformed metal damper 1 is consistent with the width of the transition groove, the metal damper 1 is pulled out of the damper mounting groove 13. During the pulling process, the auxiliary sliding roller 174 rolls to reduce the friction between the metal damper 1 and the damper mounting groove 13. At the same time, in this embodiment, before the pushing assembly 17 contacts the longest convex surface of the convex roller 161, the width of the deformed metal damper 1 is consistent with the width of the transition groove. After the metal damper 1 is taken out, the maintenance personnel adjust the pushing assembly 17 to contact the longest convex surface of the convex roller 161, and adjust it so that the pushing assembly 17 contacts the short convex surface of the convex roller 161.

[0070] When installing the corresponding metal damper 1, the maintenance personnel first use a ratchet wrench corresponding to the size of the hexagonal bolt head 19 to rotate the hexagonal bolt head 19 located on the upper front side of the damper enclosure base 12, so that the metal damper 1 to be installed will deform and shrink. Then, the metal damper 1 to be installed can be pressed into the fixing groove. And through the restoring force after the deformation of the metal damper 1, the pushing assembly 17 contacts the shortest convex surface of the convex roller 161.

[0071] This embodiment utilizes a detachable connecting component, which enables the rapid disassembly of the metal damper 1, further improving the maintenance and management efficiency of the chimney, making maintenance more convenient for managers, improving operation and maintenance efficiency, and saving replacement time.

[0072] Example 4

[0073] As a fourth embodiment of the present invention, in specific implementation, compared with embodiments one, two and three, this embodiment combines embodiments two and three. In this solution, the polytetrafluoroethylene plate 8 is fixedly connected to both ends and sides of the metal damper 1 by countersunk screws 9 and enclosing square steel 10.

[0074] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A replaceable metal damper anti-sway point for a suspended steel inner cylinder of a chimney, comprising a metal damper (1), an outer cylinder of the chimney (4), and an inner cylinder of the chimney (2), characterized in that: An anti-sway platform component is provided between the outer casing (4) and the inner casing (2) of the chimney; The anti-sway platform component is used to connect the metal damper (1) between the outer cylinder (4) and the inner cylinder (2) of the chimney via a detachable connecting component; The detachable connecting component is used to install the metal damper (1). The detachable connecting component includes two damper enclosure bases (12). One side of the damper enclosure base (12) is provided with a damper mounting groove (13), and the other side of the damper enclosure base (12) is provided with an adjustment chamber (14). The front side of the damper enclosure base (12) is provided with a transmission chamber (15). The upper and lower parts of the inner side of the adjustment chamber (14) are rotatably connected to a rotating shaft (16), and a convex roller (161) is fixedly connected to the outer side of the rotating shaft (16). A pushing assembly (17) is provided on one side of the convex roller (161) in contact with it. The pushing assembly (17) includes an inner push plate (171), a slide rod (172) and an outer push plate (173). The two ends of the slide rod (172) pass through the adjustment chamber (14) and the damper mounting groove (13) respectively. The inner push plate (171) and the outer push plate (173) are fixedly connected to the two ends of the slide rod (172) respectively. An auxiliary slide roller (174) is rotatably connected to the side of the inner push plate (171) and the outer push plate (173) away from the slide rod (172). The outer side of the convex roller (161) is in contact with the auxiliary slide roller (174) at the inner push plate (171). One end of the shaft (16) extends through the transmission chamber (15), and the shaft (16) located inside the transmission chamber (15) is also fixedly connected to a ratchet (162). The inner side of the transmission chamber (15) is rotatably connected to a tooth (151), and the tooth (151) meshes with the outer side of the ratchet (162).

2. The anti-sway point of a replaceable metal damper for a suspended steel inner cylinder of a chimney according to claim 1, characterized in that: The rotating shaft (16) located inside the transmission chamber (15) is also fixedly connected to a bevel gear one (163). A rotating cylinder (152) is rotatably connected to the inner side of the transmission chamber (15). A bevel gear two (153) is fixedly connected to one end of the rotating cylinder (152), and the bevel gear two (153) meshes with the bevel gear one (163) for transmission. The inner side of the rotating cylinder (152) is a square structure. One end of each of the two rotating cylinders (152) is inserted into the two ends of a set of square rods. The square rods are circumferentially limited and axially slid within the inner side of the rotating cylinder (152).

3. The anti-sway point of a replaceable metal damper for a suspended steel inner cylinder of a chimney according to claim 1, characterized in that: One end of a rotating shaft (16) in one of the damper enclosure bases (12) extends to the outside of the damper enclosure base (12), and the end of the rotating shaft (16) is connected to a hexagonal bolt head (19) via a torque amplifier.

4. The anti-sway point of a replaceable metal damper for a suspended steel inner cylinder of a chimney according to claim 1, characterized in that: Rigid rotating seats (20) are rotatably connected to the other side of both damper enclosure bases (12), and the rigid rotating seat (20) at one damper enclosure base (12) is fixedly connected to the side plate (7) of the anti-sway platform beam by bolts, and the rigid rotating seat (20) at the other damper enclosure base (12) is fixedly connected to the inner cylinder reinforcing ring (5) by bolts; The bottom of one damper enclosure base (12) is fixedly connected to a limiting slide plate (21), and the bottom of the other damper enclosure base (12) is slidably connected to the limiting slide plate (21).

5. The anti-sway point of a replaceable metal damper for a suspended steel inner cylinder of a chimney according to claim 1, characterized in that: When the metal damper (1) is installed through the detachable connecting component, the two ends and the sides of the metal damper (1) are fixedly connected with polytetrafluoroethylene plates (8) by countersunk screws (9) and enclosed square steel (10).

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