A displacement-velocity composite damper with a safety device

Abstract

The present invention discloses a displacement-velocity composite damper with a safety device, and relates to the technical field of engineering components. The system includes a metal damper, a viscous damper, a safety device, a steel corbel, a universal hinge, a rigid beam and a limit column. The metal damper, the viscous damper and the safety device are connected to the steel corbel and the limit column through a universal hinge, and the steel corbel is connected to the rigid beam through a bolt. The system combines the advantages of a displacement damper and a velocity damper, and is used as a guide device in the steel structure of a thermal power station boiler. It can provide an additional damping ratio and stiffness for the structure at the same time, can effectively consume seismic energy, reduce seismic shear force and displacement, and is combined with a safety device to realize a limit function under the action of wind load and when the boiler expands due to heat. It solves the problem that the existing boiler steel structure guide device can only realize limit but cannot consume energy, resulting in a large seismic response, and has broad prospects for engineering application.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering components. Background Art

[0002] Compared with other forms of power generation, thermal power has the advantages of abundant raw material resources, low economic cost and good peak-shaving performance. With the increasing demand for electricity in the country, thermal power will still have a very important position in the foreseeable future.

[0003] In the steel structure of the boiler in a thermal power station, a certain number of guide devices are usually required, one end of which is connected to the rigid beams arranged around the boiler, and the other end is connected to the limit column. When the boiler expands, wind loads, and encounters an earthquake, it plays a role in limiting the relative displacement between the boiler and the steel structure, preventing the boiler and the steel structure from colliding and being damaged. The traditional guide device has a large rigidity and only has a single limit function. When an earthquake occurs, the horizontal force transmitted to the steel structure is large, so that the designed structural components use a lot of materials and are not economical. Therefore, it is necessary to combine the advantages of the damper and improve the form of the guide device so that it has both the limit and shock absorption and energy dissipation functions. Summary of the invention

[0004] The present invention discloses a displacement-velocity composite damper with a safety device: the system includes a metal damper, a viscous damper, a safety device, a steel bracket, a universal hinge, a rigid beam and a limit column. The system combines the advantages of a displacement damper and a velocity damper, and is used as a guide device in a boiler steel structure of a thermal power station. It can provide an additional damping ratio and stiffness for the structure at the same time, can effectively consume seismic energy, reduce seismic shear force and displacement, and is combined with a safety device to achieve a limit function under wind load and when the boiler expands due to heat. The system solves the problem that the existing boiler steel structure guide device can only achieve limit but cannot consume energy, resulting in a large seismic response, and has broad prospects for engineering application.

[0005] The technical solution of the present invention is as follows:

[0006] A displacement-velocity composite damper with a safety device comprises a metal damper, a viscous damper, a safety device, a steel bracket, a universal hinge, a rigid beam, a limit column, a constraint end plate, a constraint middle plate, an energy dissipation plate, a flat steel rod, a pin shaft and bolts.

[0007] The metal damper, the viscous damper and the safety device are installed between the steel corbel and the limit column; the safety device is arranged in the center, and the metal damper and the viscous damper are arranged symmetrically with the safety device as the center, and are arranged in two layers vertically; the steel corbel is connected to the rigid beam by bolts.

[0008] The metal damper consists of two constrained end plates, a constrained middle plate and several energy-absorbing plates welded between the plates; the constrained end plates and the constrained middle plate are made of ordinary steel, and the energy-absorbing plate is made of low-yield steel; one end of the constrained end plate is connected to the steel corbel by a universal hinge, and one end of the constrained middle plate is connected to the limit column by a universal hinge.

[0009] Both ends of the viscous damper are connected to the steel bracket and the limit column by universal hinges.

[0010] The safety device is composed of three flat steel rods and a pin shaft; one end of the flat steel rod is connected to a steel corbel or a limit column by a universal hinge, and the other end is connected to each other by a pin shaft.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) It combines the advantages of both velocity-type and displacement-type dampers, and can simultaneously increase the additional damping ratio and stiffness of the structure, effectively consuming seismic energy in both small and large earthquakes;

[0013] (2) When the boiler is subjected to thermal expansion and wind load, the safety device and universal hinge are used to realize the limit function in the expansion and load direction, without limiting the deformation in the other horizontal orthogonal direction and vertical direction;

[0014] (3) When an earthquake occurs, the pin of the safety device is sheared off, and the metal damper provides rigidity to the structure, preventing the structure from undergoing large displacement, thus achieving the limit function under earthquake. At the same time, the viscous damper is used to consume earthquake energy, further reducing earthquake shear force and displacement.

[0015] (4) The composite damper can be prefabricated together with the steel corbel and assembled to the rigid beam by bolts. It is easy to install and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram (plan layout diagram) of the present invention;

[0017] Figure 2 It is a schematic diagram of the vertical arrangement of components of the present invention;

[0018] Figure 3 is a schematic cross-sectional view of a metal damper of the present invention;

[0019] Figure 4 It is a structural diagram of the safety device of the present invention;

[0020] In the figure: 1-metal damper, 2-viscous damper, 3-safety device, 4-steel bracket, 5-universal hinge, 6-rigid beam, 7-limiting column, 8-constraint end plate, 9-constraint middle plate, 10-energy absorption plate, 11-flat steel rod, 12-pin shaft, 13-bolt. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, a displacement-velocity composite damper with a safety device comprises a metal damper (1), a viscous damper (2), a safety device (3), a steel bracket (4), a universal hinge (5), a rigid beam (6), a limit column (7) and a bolt (13); the metal damper (1), the viscous damper (2) and the safety device (3) are installed between the steel bracket (4) and the limit column (7), and both ends are connected by a universal hinge (5); the steel bracket (4) is connected to the rigid beam (6) by a bolt (13).

[0023] like Figure 2 As shown, the composite damper system is arranged in the following manner: the safety device (3) is arranged in the center, and the metal damper (1) and the viscous damper (2) are arranged symmetrically with the safety device (3) as the center, and are arranged in two layers vertically.

[0024] like Figure 3 As shown, the metal damper (1) is composed of two constrained end plates (8), a constrained middle plate (9) and several energy dissipation plates (10) welded between the plates; the constrained end plates (8) and the constrained middle plate (9) are made of ordinary steel, and the energy dissipation plate (10) is made of low-yield steel; one end of the constrained end plate (8) is connected to the steel bracket (4) by a universal hinge (5), and one end of the constrained middle plate (9) is connected to the limit column (7) by a universal hinge (5).

[0025] like Figure 4 As shown, the safety device (3) is composed of three flat steel rods (11) and a pin (12); one end of the flat steel rod (11) is connected to the steel bracket (4) or the limit column (7) by a universal hinge (5), and the other end is connected to each other by the pin (12).

[0026] The present invention proposes a displacement-velocity composite damper with a safety device. The system is used as a guide device in the steel structure of a thermal power plant boiler, which can effectively consume seismic energy, reduce seismic shear force and displacement, and realize the limit function at the same time. It solves the problem that the existing boiler steel structure guide device can only achieve limit but cannot consume energy, resulting in a large seismic response, and has broad engineering application prospects.

[0027] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. Those skilled in the art may make some modifications, supplements or replace with similar methods without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

[0028] Although the following terms are frequently used in this article: 1-metal damper, 2-viscous damper, 3-safety device, 4-steel bracket, 5-universal hinge, 6-rigid beam, 7-limiting column, 8-constrained end plate, 9-constrained middle plate, 10-energy dissipation plate, 11-flat steel rod, 12-pin shaft, 13-bolt, etc., the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention. It is contrary to the spirit of the present invention to interpret them as any additional limitation.

Claims

1. A displacement-velocity composite damper with a safety device, used as a guide device in a boiler steel structure of a thermal power station to simultaneously realize energy dissipation and limit functions, and relates to the technical field of engineering components; the damper comprises a metal damper (1), a viscous damper (2), a safety device (3), a steel bracket (4), a universal hinge (5), a rigid beam (6), a limit column (7), a constraint end plate (8), a constraint middle plate (9), an energy dissipation plate (10), a flat steel rod (11), a pin shaft (12), and a bolt (13); The metal damper (1), the viscous damper (2), and the safety device (3) are installed between the steel bracket (4) and the limit column (7) through a universal hinge (5); the number of the safety device (3) is 1, which is arranged in the center; the number of the metal damper (1) and the viscous damper (2) are both 2, which are arranged symmetrically in the circumferential direction with the axis of the safety device (3) as the center; the steel bracket (4) is connected to the rigid beam (6) through a bolt (13); The safety device (3) is composed of three flat steel rods (11) and a pin shaft (12); one end of the flat steel rod (11) is connected to a steel bracket (4) or a limit column (7) by a universal hinge (5), and the other end is connected to each other by a pin shaft (12).

2. The displacement-velocity composite damper with a safety device according to claim 1, characterized in that: The metal damper (1) is composed of two constrained end plates (8), a constrained middle plate (9) and a plurality of energy dissipation plates (10) welded between the plates; the constrained end plates (8) and the constrained middle plate (9) are made of ordinary steel, and the energy dissipation plate (10) is made of low-yield steel; one end of the constrained end plate (8) is connected to the steel bracket (4) by a universal hinge (5), and one end of the constrained middle plate (9) is connected to the limit column (7) by a universal hinge (5).

3. The displacement-velocity composite damper with a safety device according to claim 1, characterized in that: Both ends of the viscous damper (2) are connected to the steel bracket (4) and the limit column (7) respectively by means of universal hinges (5).

Images