Broadband multistage engineering vibration / seismic vibration reduction device

Abstract

The invention provides a broadband multistage engineering vibration / seismic vibration reduction device including an outer sleeve, a multistage variable stiffness engineering vibration / seismic vibratio

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vibration / seismic vibration reduction of buildings, in particular to a broadband multistage engineering vibration / seismic vibration reduction device. BACKGROUND

[0002] With the development of social economy, a large number of high-rise buildings have been built in China in the past 20 years, but the vibration problem of high-rise buildings has gradually emerged, such as the vibration of SEG Building in 2021, the vibration of Shanghai Information Building in 2013 and the vibration of Techno Mart Building in Seoul in 2011. In addition, China is located on the Pacific Rim and Eurasian seismic belt. After the Wenchuan earthquake in 2008, earthquakes beyond fortification occurred frequently, such as Lushan earthquake in 2013, Ludian earthquake in 2014, Luding earthquake in 2022 and Jishishan earthquake in 2023. It is a great challenge and also an engineering problem that must be faced to meet the vibration comfort of high-rise buildings and ensure the safety of high-rise buildings under seismic excitation. Therefore, how to realize dual control of engineering vibration and seismic vibration of structures is a hot research topic at present, which has extremely high research values and engineering significance. Therefore, it is necessary to design an engineering vibration / seismic vibration reduction device to improve the vibration comfort of high-rise buildings and ensure the safety of high-rise buildings. SUMMARY

[0003] The present disclosure aims to provide a broadband multistage engineering vibration / seismic vibration reduction device so as to solve the problems in the prior art, so as to improve the engineering vibration comfort of high-rise buildings and ensure the safety of high-rise buildings.

[0004] In order to achieve the purpose, the present disclosure provides the following solution.

[0005] The present disclosure provides a broadband multistage engineering vibration / seismic vibration reduction device. The broadband multistage engineering vibration / seismic vibration reduction device includes an outer sleeve, a multistage variable stiffness engineering vibration / seismic vibration reduction damper, a first connecting plate, a second connecting plate, a displacement restrainer and a tuned mass engineering vibration absorption device.

[0006] The multistage variable stiffness engineering vibration / seismic vibration reduction damper includes an engineering vibration reduction component and a seismic vibration reduction component The engineering vibration reduction component includes viscoelastic members and lead cores which are alternately arranged in an axial direction of the outer sleeve, and the seismic vibration reduction component includes an energy dissipation material core and a restraint sleeve; the restraint sleeve fixedly sleeves the energy dissipation material core, and the outer sleeve sleeves the restraint sleeve; the engineering vibration reduction component is arranged between the restraint sleeve and the outer sleeve, and is fixedly connected to the restraint sleeve and the outer sleeve.

[0007] The outer sleeve and the energy dissipation material core are arranged between the first connecting plate and the second connecting plate, one end of the energy dissipation material core is fixed to the first connecting plate, and an other end of the energy dissipation material core is fixedly connected to a restraint rod; a gap allowing the restraint rod to move is formed between the restraint rod and the second connecting plate; one end of the outer sleeve is fixed to the second connecting plate, and a gap allowing the outer sleeve to move is formed between an other end of the outer sleeve and the first connecting plate.

[0008] The displacement restrainer includes an elastic clamping block and a stopper, the elastic clamping block is fixed to the restraint rod, the stopper is fixed to an inner wall of the outer sleeve and corresponds to the elastic clamping block, both ends of the stopper are respectively formed with clamping grooves which are matched with the elastic clamping block, respectively arranged on both sides of the elastic clamping block, and spaced with the elastic clamping block in the axial direction.

[0009] The tuned mass engineering vibration absorption device includes a mass block and a connecting rod, wherein one end of the connecting rod is fixedly connected to the mass block, and an other end of the connecting rod is in threaded connection with an outer side wall of the outer sleeve.

[0010] Preferably, the tuned mass engineering vibration absorption device further includes an engineering vibration prevention device, wherein the engineering vibration prevention device includes anti-engineering vibration baffles, a limiting gear and a limiting rack, wherein the limiting gear is rotatably connected to the connecting rod; the anti-engineering vibration baffles are uniformly arranged on an outer side of the mass block in a circumferential direction of the mass block; one end of each of the anti-engineering vibration baffles respectively passes through a corresponding one of through holes in the limiting gear and the anti-engineering vibration baffles are rotatable on the outer side wall of the outer sleeve; the limiting gear is internally and fixedly provided with pushing members respectively corresponding to the anti-engineering vibration baffles; when the limiting gear rotates, the anti-engineering vibration baffles are able to be pushed by the pushing members to close to each other so as to clamp the mass block; the outer side wall of the outer sleeve is slidably connected with the limiting rack in the axial direction of the outer sleeve; one end of the limiting rack is hinged to the first connecting plate or the second connecting plate; and the limiting rack is provided with driving tooth segments which are arranged at intervals and able to be meshed with the limiting gear.

[0011] Preferably, one end of each of the anti-engineering vibration baffles is rotatably connected to the outer side wall of the outer sleeve via a rotating shaft, and a torsional spring sleeves the rotating shaft, so that each of the anti-engineering vibration baffle is in an open state under the torsional spring in a natural state.

[0012] Preferably, the elastic clamping block includes a guide rod, a guide sleeve, a circular clamping block and a disc spring, wherein the guide sleeve is fixedly connected to the restraint rod; one end of the guide rod is slidably arranged within the guide sleeve, and an other end of the guide rod is fixedly connected to the circular clamping block; the disc spring sleeves the guide sleeve; both ends of the disc spring respectively abut against an outer wall of the restraint rod and the circular clamping block; and each of the clamping grooves is a circular clamping groove matched with the circular clamping block.

[0013] Preferably, an axially extending sliding groove is formed in a side wall of the guide sleeve, and the guide rod is fixedly provided with a sliding block slidably connected to the sliding groove.

[0014] Preferably, the connecting rod is made of spring steel, and the mass block is made of ordinary steel.

[0015] Preferably, the outer sleeve includes two channel steel plates, and the two channel steel plates are welded together to form the outer sleeve in a rectangular shape.

[0016] Preferably, a guide groove is formed in the stopper and located between the clamping grooves in both ends of the stopper, the guide groove is connected with the clamping grooves in both ends of the stopper via smooth curved surfaces respectively, and each of the smooth curved surfaces is configured for guiding the elastic clamping block into a corresponding one of the clamping grooves from the guide groove.

[0017] Preferably, a limiting protrusion is arranged on a middle of the energy dissipation material core, and a limiting groove matched with the limiting protrusion is formed in an inner wall of the restraint sleeve.

[0018] Compared with the prior art, the present disclosure has the following technical effects.

[0019] Firstly, multistage vibration / seismic vibration reduction is achieved. The tuned mass engineering vibration absorption devices with different masses work together with the engineering vibration reduction component and the seismic vibration reduction component in the multistage variable stiffness engineering vibration / seismic vibration reduction damper, so that high-frequency and low-frequency engineering vibrations can be reduced in a broadband and multistage manner.

[0020] Secondly, the multistage variable stiffness engineering vibration / seismic vibration reduction damper can realize the variable stiffness function. When the structure vibrates with a small displacement, the engineering vibration reduction component in the multistage variable stiffness engineering vibration / seismic vibration reduction damper provides less stiffness and sufficient damping. When the structure has a large displacement response under the earthquake, the seismic vibration reduction component in the multistage variable stiffness engineering vibration / seismic vibration reduction damper provides greater stiffness and sufficient damping.

[0021] Thirdly, the device has the advantages of speed dampers and displacement dampers. The engineering vibration reduction component (speed damper) and the seismic vibration reduction component (displacement damper) are connected in series to make up for the shortcomings of limited working displacement of the engineering vibration reduction component and excessive initial stiffness of the seismic vibration reduction component, and the device has the advantages of both types of dampers.

[0022] Fourthly, the two stages of work are decoupled from each other. The tuned mass engineering vibration absorption device can work effectively with the speed damper. However, when the tuned mass engineering vibration absorption device works with the displacement damper, since the displacement damper provides additional stiffness, the tuned mass engineering vibration absorption device may affect the work of the seismic vibration reduction component. By means of the arrangement of the displacement restrainer and mass block anti-engineering vibration devices (engineering vibration prevention devices), the two stages of work can be decoupled without interference.

[0023] Fifthly, the service life is long. Based on the probability of structural vibration and earthquake, the tuned mass engineering vibration absorption device and the engineering vibration reduction component with long service life are used for engineering vibration reduction. The seismic vibration reduction component with excellent energy dissipation capacity is used for seismic vibration reduction, and the service life of the whole device is prolonged through reasonable design.

[0024] Sixthly, the design ability is high. The mass of the tuned mass engineering vibration absorption device and the size of the engineering vibration reduction component of the broadband variable stiffness damper can be changed to meet the vibration reduction requirements of the structure at different frequencies and realize multistage vibration reduction. The size of the seismic vibration reduction component can be changed to enhance the seismic capacity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the embodiments of the present disclosure or the technical solution in the prior art, the following briefly introduces the accompanying drawings to be used in the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and those skilled in the art may still derive other drawings from these accompanying drawings without creative efforts.

[0026] FIG. 1 is a view of a broadband multistage engineering vibration / seismic vibration reduction device according to the present disclosure.

[0027] FIG. 2 is an exploded view of an engineering vibration reduction component according to the present disclosure.

[0028] FIG. 3 is an exploded view of a seismic vibration reduction component according to the present disclosure.

[0029] FIG. 4 is a sectional view of a restraint sleeve according to the present disclosure.

[0030] FIG. 5 is a detail view of an outer sleeve and a stopper according to the present disclosure.

[0031] FIG. 6 is a detail view of an elastic clamping block according to the present disclosure.

[0032] FIG. 7 is a detail view of a tuned mass engineering vibration absorption device according to the present disclosure.

[0033] FIG. 8 is a detail view of connection of an anti-engineering vibration baffle and an outer sleeve according to the present disclosure.

[0034] FIG. 9 is a detail view of the anti-engineering vibration baffle according to the present disclosure.

[0035] FIG. 10 is a detail view of a limiting gear according to the present disclosure.

[0036] FIG. 11 is a working schematic diagram of a broadband multistage engineering vibration / seismic vibration reduction device when being tensioned according to the present disclosure.

[0037] FIG. 12 is a working schematic diagram of a broadband multistage engineering vibration / seismic vibration reduction device when being pressed according to the present disclosure.

[0038] Reference numerals: 1 outer sleeve; 2 first connecting plate; 3 second connecting plate; 4 viscoelastic member; 5 energy dissipation material core; 501 limiting protrusion; 6 restraint sleeve; 601 limiting groove; 7 restraint rod; 8 elastic clamping block; 9 stopper; 901 clamping groove; 902 guide groove; 903 smooth curved surface; 10 mass block; 11 connecting rod; 12 anti-engineering vibration baffle; 13 limiting gear; 1301 through hole; 1302 pushing member; 14 limiting rack; 15 driving tooth segment; 16 lead core; 17 guide rod; 18 guide sleeve; 19 circular clamping block; 20 disc spring; 21 sliding groove; 22 sliding block; 23 channel steel plate; 24 rotating shaft; and 25 torsional spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The foilowing clearly and completely describes the technical solution in the embodiments of the present disclosure with reference to accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments acquired by the ordinary technical staff in the art without creative efforts belong to the scope of the present disclosure.

[0040] The objective of present disclosure is to provide a broadband multistage engineering vibration / seismic vibration reduction device so as to solve the problems in the prior art, so that the multistage engineering vibration / seismic vibration reduction can be realized and the engineering vibration comfort of high-rise buildings and the safety of high-rise buildings are ensured.

[0041] To make the foregoing objective, features and advantages of the present disclosure clearer and more comprehensible, the present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] As shown in FIGS. 1-12, the embodiment provides a broadband multistage engineering vibration / seismic vibration reduction device. The broadband multistage engineering vibration / seismic vibration reduction device includes an outer sleeve 1, a multistage variable stiffness engineering vibration / seismic vibration reduction damper, a first connecting plate 2, a second connecting plate 3, a displacement restrainer and tuned mass engineering vibration absorption devices.

[0043] The multistage variable stiffness engineering vibration / seismic vibration reduction damper includes an engineering vibration reduction component and a seismic vibration reduction component. The engineering vibration reduction component includes viscoelastic members 4 and lead cores 16 which are alternately arranged in the axial direction, and the seismic vibration reduction component includes an energy dissipation material core 5 and a restraint sleeve 6. The restraint sleeve 6 fixedly sleeves the energy dissipation material core 5 and is configured for restraining the buckling of the energy dissipation material core 5, and the outer sleeve 1 sleeves the restraint sleeve 6. The engineering vibration reduction component is arranged between the restraint sleeve 6 and the outer sleeve 1, and is fixedly connected to the restraint sleeve 6 and the outer sleeve 1.

[0044] The outer sleeve 1 and the energy dissipation material core 5 are arranged between the first connecting plate 2 and the second connecting plate 3. One end of the energy dissipation material core 5 is fixedly welded to the first connecting plate 2, and the other end of the energy dissipation material core 5 is fixedly welded to a restraint rod 7. A gap allowing the restraint rod 7 to move is formed between the restraint rod 7 and the second connecting plate 3. One end of the outer sleeve 1 is fixedly welded to the second connecting plate 3, and a gap allowing the outer sleeve 1 to move is formed between the other end of the outer sleeve 1 and the first connecting plate 2.

[0045] The displacement restrainer includes an elastic clamping block 8 and a stopper 9. The elastic clamping block 8 is fixed to the restraint rod 7. The stopper 9 is fixedly welded to an inner wall of the outer sleeve 1 and corresponds to the elastic clamping block 8. Both ends of the stopper 9 are respectively formed with clamping grooves 901 which are matched with the elastic clamping block 8, respectively arranged on both sides of the elastic clamping block 8, and axially spaced with the elastic clamping block 8.

[0046] The tuned mass engineering vibration absorption device includes a mass block 10 and a connecting rod 11. One end of the connecting rod 11 is fixedly connected to the mass block 10, and the other end of the connecting rod 11 is in threaded connection with an outer side wall of the outer sleeve 1.

[0047] In the embodiment, the reduction to engineering vibrations at different frequencies can be achieved by arranging mass blocks 10 with different masses. When small-displacement engineering vibration occurs, a high-damping viscoelastic material (viscoelastic member 4) in the multistage variable stiffness engineering vibration / seismic vibration reduction damper is deformed, and together with the tuned mass engineering vibration absorption device, dissipate part of the energy of engineering vibration action, so as to realize the engineering vibration reduction function. The viscoelastic member 4 and the lead core 16 are connected to the inner wall of the outer sleeve 1 and the outer wall of the restraint sleeve 6 by means of integral vulcanization, so that the overall engineering vibration reduction effect of the engineering vibration reduction component is improved. When the displacement is large enough, the elastic clamping block 8 is clamped into the clamping groove 901, so that the energy dissipation material core 5 and the outer sleeve 1 are relatively fixed, so that the overall stiffness and damping of the structure are increased to resist the structural seismic vibration response. When the displacement continues to increase, the energy dissipation material core 5 in the multistage variable stiffness engineering vibration / seismic vibration reduction damper yields under the earthquake, resulting in plastic deformation and effective seismic vibration reduction of the structure. By arranging the tuned mass engineering vibration absorption device and the multistage variable stiffness engineering vibration / seismic vibration reduction damper, the device can realize broadband multistage engineering vibration / seismic vibration reduction, so that the engineering vibration comfort and safety of high-rise buildings are ensured. Bolt holes for connection are formed in the first connecting plate 2 and the second connecting plate 3, and are respectively used for connection with non-energy dissipation components at both ends. The elastic clamping blocks 8 are fixed on both sides of the restraint rod 7 respectively, and stoppers 9 corresponding to the two elastic clamping blocks 8 respectively are arranged on the inner wall of the outer sleeve 1. Three mass blocks 10 are arranged at intervals on each of both sides of the outer side wall of the outer sleeve 1, and each mass block 10 is connected to the outer side wall of the outer sleeve 1 via the connecting rod 11.

[0048] In the embodiment, the tuned mass engineering vibration absorption device also includes an engineering vibration prevention device. The engineering vibration prevention device includes anti-engineering vibration baffles 12, a limiting gear 13 and a limiting rack 14. The limiting gear 13 is rotatably connected to the connecting rod 11. The anti-engineering vibration baffles 12 are uniformly arranged on the outer side of the mass block 10 in the circumferential direction. In the embodiment, four anti-engineering vibration baffles 12 are arranged. One end of the anti-engineering vibration baffle 12 passes through a through hole 1301 in the limiting gear 13 and the anti-engineering vibration baffle 12 is rotatable on an outer side wall of the outer sleeve 1. The limiting gear 13 is internally and fixedly provided with pushing members 1302 respectively corresponding to anti-engineering vibration baffles 12. When the limiting gear 13 rotates, the anti-engineering vibration baffles 12 can be pushed by the pushing members 1302 to close to each other, so as to clamp the mass block 10. The outer side wall of the outer sleeve 1 is slidably connected with the limiting racks 14 in the axial direction thereof. One end of the limiting rack 14 is hinged to the first connecting plate 2 or the second connecting plate 3. Specifically, in the embodiment, one end of the limiting rack 14 is hinged to the first connecting plate 2. The limiting rack 14 is provided with driving tooth segments 15 which are arranged at intervals and can be meshed with the limiting gears 13. In the embodiment, the limiting racks 14 are respectively arranged on both sides of the outer side wall of the outer sleeve 1. The driving tooth segments 15 on the limiting rack 14 at one side of the outer side wall of the outer sleeve 1 correspond to the limiting gear 13 on the one side. When the displacement is large enough, the elastic clamping block 8 is clamped into the clamping groove 901, at the same time, the driving tooth segments 15 on the limiting rack 14 drives the corresponding limiting gear 13 to rotate, and then the pushing members 1302 in the limiting gear 13 push the anti-engineering vibration baffles 12 to close to each other and clamp the mass block 10 to limit the vibration of the mass block 10, so that the interference on the operation of the seismic vibration reduction component is avoided.

[0049] In the embodiment, one end of the anti-engineering vibration baffle 12 is rotatably connected to the outer side wall of the outer sleeve 1 via a rotating shaft 24, and a torsional spring 25 sleeves the rotating shaft 24, so that the anti-engineering vibration baffle 12 is in an open state under the torsional spring 25 in a natural state. Therefore, the purpose of engineering vibration reduction is realized when small-displacement engineering vibration occurs.

[0050] In the embodiment, the elastic clamping block 8 includes a guide rod 17, a guide sleeve 18, a circular clamping block 19 and a disc spring 20. The guide sleeve 18 is fixedly welded to the restraint rod 7. One end of the guide rod 17 is slidably arranged within the guide sleeve 18, and the other end of the guide rod 17 is fixedly connected to the circular clamping block 19. The disc spring 20 sleeves the guide sleeve 18. Both ends of the disc spring 20 respectively abut against an outer wall of the restraint rod 7 and the circular clamping block 19. The clamping groove 901 is a circular clamping groove matched with the circular clamping block 19. When the circular clamping block 19 is displaced into the clamping groove 901, under the elastic force of the disc spring 20, the circular clamping block 19 can be restored to the initial position thereof so as to be clamped into the clamping groove 901, so that the energy dissipation material core 5 and the outer sleeve 1 can be kept relatively fixed.

[0051] In the embodiment, an axially extending sliding grooves 21 are formed in a side wall of the guide sleeve 18, and the guide rod 17 is fixedly provided with sliding blocks 22 slidably connected to the sliding grooves 22. The guide rod 17 can be prevented from dislodging from the guide sleeve 18 by means of the cooperation of the sliding grooves 21 and the sliding blocks 22.

[0052] In the embodiment, the connecting rod 11 is made of spring steel, and the mass block 10 is made of ordinary steel.

[0053] In the embodiment, the outer sleeve 1 includes two channel steel plates 23, and the two channel steel plates 23 are welded together to form the rectangular outer sleeve 1, which is convenient to be manufactured.

[0054] In the embodiment, a guide groove 902 is formed with the stopper 9. The guide groove 902 is located between the clamping grooves 901 in both ends. The guide groove 902 is respectively connected to the clamping grooves 901 at both ends via smooth curved surfaces 903, and the smooth curved surface 903 is configured for guiding the elastic clamping block 8 into the clamping groove 901 from the guide groove 902, so that the elastic clamping block 8 moves steadily.

[0055] In the embodiment, a limiting protrusion 501 is arranged on the middle of the energy dissipation material core 5, and a limiting groove 601 matched with the limiting protrusion 501 is formed in an inner wall of the restraint sleeve 6. The limiting protrusion 501 is matched and connected in the limiting groove 601, so that the energy dissipation material core 5 and the restraint sleeve 6 can be fixed relative to each other, and the energy dissipation material core 5 can be deformed more uniformly changed when being tensioned (pressed).

[0056] The broadband multistage engineering vibration / seismic vibration reduction device provided by the present disclosure can be applied to bridge structures and building structures, and can realize the purposes of energy dissipation and engineering vibration reduction. The device has a simple structure, and a good stability and excellent energy dissipation and vibration reduction capacities. By using the device of the present disclosure, the damage of the structure in the earthquake and the difficulty and cost of post-disaster reconstruction can be effectively reduced, and the personal and property safety of users can be guaranteed.

[0057] Specific examples are used for illustration of the principles and implementation methods of the present disclosure. The description of the above-mentioned embodiments is used to help illustrate the method and its core principles of the present disclosure. In addition, those skilled in the art can make various modifications in terms of specific embodiments and scope of application in accordance with the teachings of the present disclosure. In summary, the contents of this specification should not be understood as the limitation of the present disclosure.

Claims

1. A broadband multistage engineering vibration / seismic vibration reduction device, comprising an outer sleeve, a multistage variable stiffness engineering vibration / seismic vibration reduction damper, a first connecting plate, a second connecting plate, a displacement restrainer and a tuned mass engineering vibration absorption device, whereinthe multistage variable stiffness engineering vibration / seismic vibration reduction damper comprises an engineering vibration reduction component and a seismic vibration reduction component, wherein the engineering vibration reduction component includes viscoelastic members and lead cores which are alternately arranged in an axial direction of the outer sleeve, and the seismic vibration reduction component includes an energy dissipation material core and a restraint sleeve; the restraint sleeve fixedly sleeves the energy dissipation material core, and the outer sleeve sleeves the restraint sleeve; the engineering vibration reduction component is arranged between the restraint sleeve and the outer sleeve, and is fixedly connected to the restraint sleeve and the outer sleeve;the outer sleeve and the energy dissipation material core are arranged between the first connecting plate and the second connecting plate, one end of the energy dissipation material core is fixed to the first connecting plate, and an other end of the energy dissipation material core is fixedly connected to a restraint rod; a gap allowing the restraint rod to move is formed between the restraint rod and the second connecting plate; one end of the outer sleeve is fixed to the second connecting plate, and a gap allowing the outer sleeve to move is formed between an other end of the outer sleeve and the first connecting plate;the displacement restrainer comprises an elastic clamping block and a stopper, the elastic clamping block is fixed to the restraint rod, the stopper is fixed to an inner wall of the outer sleeve and corresponds to the elastic clamping block, both ends of the stopper are respectively formed with clamping grooves which are matched with the elastic clamping block, respectively arranged on both sides of the elastic clamping block, and spaced with the elastic clamping block in the axial direction;the tuned mass engineering vibration absorption device comprises a mass block and a connecting rod, wherein one end of the connecting rod is fixedly connected to the mass block, and an other end of the connecting rod is in threaded connection with an outer side wall of the outer sleeve.

2. The broadband multistage engineering vibration / seismic vibration reduction device according to claim 1, wherein the tuned mass engineering vibration absorption device furthercomprises an engineering vibration prevention device, wherein the engineering vibration prevention device comprises anti-engineering vibration baffles, a limiting gear and a limiting rack, wherein the limiting gear is rotatably connected to the connecting rod; the anti-engineering vibration baffles are uniformly arranged on an outer side of the mass block in a circumferential direction of the mass block; one end of each of the anti-engineering vibration baffles respectively passes through a corresponding one of through holes in the limiting gear and the anti-engineering vibration baffles are rotatable on the outer side wall of the outer sleeve; the limiting gear is internally and fixedly provided with pushing members respectively corresponding to the anti-engineering vibration baffles; when the limiting gear rotates, the anti-engineering vibration baffles are able to be pushed by the pushing members to close to each other so as to clamp the mass block; the outer side wall of the outer sleeve is slidably connected with the limiting rack in the axial direction of the outer sleeve; one end of the limiting rack is hinged to the first connecting plate or the second connecting plate; and the limiting rack is provided with driving tooth segments which are arranged at intervals and able to be meshed with the limiting gear.

3. The broadband multistage engineering vibration / seismic vibration reduction device as according to claim 2, wherein one end of each of the anti-engineering vibration baffles is rotatably connected to the outer side wall of the outer sleeve via a rotating shaft, and a torsional spring sleeves the rotating shaft, so that each of the anti-engineering vibration baffle is in an open state under the torsional spring in a natural state.

4. The broadband multistage engineering vibration / seismic vibration reduction device as claimed in any preceding claim, wherein the elastic clamping block comprises a guide rod, a guide sleeve, a circular clamping block and a disc spring, wherein the guide sleeve is fixedly connected to the restraint rod; one end of the guide rod is slidably arranged within the guide sleeve, and an other end of the guide rod is fixedly connected to the circular clamping block; the disc spring sleeves the guide sleeve; both ends of the disc spring respectively abut against an outer wall of the restraint rod and the circular clamping block; and each of the clamping grooves is a circular clamping groove matched with the circular clamping block.

5. The broadband multistage engineering vibration / seismic vibration reduction device according to claim 4, wherein an axially extending sliding groove is formed in a side wall of the guide sleeve, and the guide rod is fixedly provided with a sliding block slidably connected to the sliding groove.

6. The broadband multistage engineering vibration / seismic vibration reduction device according to any preceding claim, wherein the connecting rod is made of spring steel, and the mass block is made of ordinary steel.

7. The broadband multistage engineering vibration / seismic vibration reduction device according to any preceding claim, wherein the outer sleeve comprises two channel steel plates, and the two channel steel plates are welded together to form the outer sleeve in a rectangular shape.

8. The broadband multistage engineering vibration / seismic vibration reduction device according to any preceding claim, wherein a guide groove is formed in the stopper and located between the clamping grooves in both ends of the stopper, the guide groove is connected with the clamping grooves in both ends of the stopper via smooth curved surfaces respectively, and each of the smooth curved surfaces is configured for guiding the elastic clamping block into a corresponding one of the clamping grooves from the guide groove.

9. The broadband multistage engineering vibration / seismic vibration reduction device according to any preceding claim, wherein a limiting protrusion is arranged on a middle of the energy dissipation material core, and a limiting groove matched with the limiting protrusion is formed in an inner wall of the restraint sleeve.

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