A vibration resistant connection joint for steel structures

Abstract

The present application relates to the technical field of building protection, and particularly relates to a steel structure anti-vibration connecting joint, which comprises a hydraulic cylinder, a first viscous damping assembly, a first transmission assembly, a second viscous damping assembly and a second transmission assembly. The hydraulic cylinder comprises a cylinder body, a piston ring and a piston rod. The piston ring is slidably connected in the cylinder body. Hydraulic oil is filled between the hydraulic cylinder and the lower end surface of the piston ring. The present application is provided with the hydraulic cylinder, the first viscous damping assembly, the first transmission assembly, the second viscous damping assembly and the second transmission assembly. In the case of strong earthquake, in addition to the operation of the first viscous damping assembly, the second transmission assembly transmits the stroke of the hydraulic cylinder to the second viscous damping assembly after amplification, drives the second viscous damping assembly to operate, at this time, the first viscous damping assembly and the second viscous damping assembly simultaneously absorb kinetic energy, so as to improve the anti-vibration effect, and prevent the first viscous damping assembly from being damaged due to overstroke.

Description

Technical Field

[0001] This invention relates to the field of building protection technology, and in particular to a vibration-resistant connection node for steel structures. Background Technology

[0002] Connection nodes in steel structures are key components that connect structural members (such as beams and columns) into a whole using specific methods (such as welding, bolting, and riveting) to transfer loads (shear force, bending moment, axial force, etc.) and ensure the overall stability of the structure. Among these, vibration-resistant connection nodes are a commonly used type. Under vibration loads (such as earthquakes and strong winds), they can reliably transfer loads and dissipate vibration energy through deformation or special construction, reducing the vibration response of the main structure and preventing premature node failure.

[0003] Vibration-resistant connection nodes are further divided into flexible connection nodes and energy-dissipating connection nodes. Flexible connection nodes absorb vibration energy through flexible structures, such as elastic gaskets and rubber pads, reducing the amplitude of loads transmitted to the main structure. For example, in the connection between steel frames and auxiliary components (such as curtain walls and pipe supports), bolt connections with rubber pads are used to allow small displacements to buffer vibrations. Energy-dissipating connection nodes have viscous dampers, friction dampers, and other devices built into the node. Vibration energy is directly consumed through the deformation or friction of the damper. It is a commonly used and efficient form in seismic and wind-induced vibration design.

[0004] Viscous dampers generate energy dissipation through the viscous flow of the damping medium, primarily relying on the relative displacement and velocity between the upper and lower cantilever walls for response. In traditional viscous damper designs, the response displacement and velocity are directly related to the relative displacement and velocity between the cantilever walls. For example, when the relative displacement between the cantilever walls is L, the response displacement of the viscous damper is also L; when the relative velocity is V, the response velocity of the viscous damper is also V. Therefore, the energy dissipation capacity of viscous dampers is largely limited by the displacement and velocity between the cantilever walls, restricting their vibration resistance under certain seismic loads. To address this problem, Chinese invention patent CN119531517B, entitled "A Viscous Damping Device Based on Displacement Amplification," provides a solution. It employs a lever structure and amplifies the vibration displacement by setting the lever arm relationship. It has a significant effect when the vibration amplitude is small, but when faced with larger amplitude vibrations, the amplification method can lead to overtravel damage to the damper. Summary of the Invention

[0005] Therefore, it is necessary to provide a vibration-resistant steel structure connection node to address the problems existing in current energy-dissipating connection nodes, in order to solve the problem of damper overtravel damage when the vibration amplitude is large.

[0006] The above objectives are achieved through the following technical solutions: A vibration-resistant connection node for a steel structure includes: A hydraulic cylinder includes a cylinder body, piston rings, and piston rod. The piston rings are slidably connected to the cylinder body, and the piston rod is coaxially fixed to the piston rings. The cylinder body is connected to a column of a steel structure, and the piston rod is connected to a beam of a steel structure. A primary viscous damping assembly includes a primary damping cylinder and a primary damping piston. The primary damping cylinder is located outside the cylinder body, and the primary damping piston is slidably connected inside the primary damping cylinder. The first transmission assembly is connected between the hydraulic cylinder and the first-stage viscous damping assembly; The first transmission assembly is configured such that when the piston ring moves, the first-stage damping piston moves, and the stroke of the first-stage damping piston is greater than the stroke of the piston ring. A secondary viscous damping assembly includes a secondary damping cylinder and a secondary damping piston. The secondary damping cylinder is located outside the cylinder body, and the secondary damping piston is slidably connected inside the secondary damping cylinder. The second transmission assembly is connected between the hydraulic cylinder and the secondary viscous damping assembly; The second transmission component is configured such that when the piston ring moves past a preset position, the secondary damping piston moves, and the stroke of the secondary damping piston is greater than the subsequent stroke of the piston ring.

[0007] Preferably, the first transmission assembly includes a first connecting plate, a first transmission piston, and a first connecting member. The first connecting plate is fixedly connected between the cylinder body and the first-stage damping cylinder. A first oil chamber is formed in the first connecting plate. The first oil chamber extends along the cylinder body axis. The bottom of the cylinder body and the top of the first oil chamber are connected. The first transmission piston is slidably connected in the first oil chamber. The two ends of the first connecting member are respectively connected to the bottom of the first transmission piston and the bottom of the first-stage damping piston.

[0008] Preferably, the second transmission assembly includes a second connecting plate, a second transmission piston, a second connecting member, and a control unit. The second connecting plate is fixedly connected between the primary damping cylinder and the secondary damping cylinder. A second oil chamber is formed inside the second connecting plate and extends along the cylinder axis. The bottom of the cylinder and the top of the second oil chamber can communicate with each other. The control unit is located between the bottom of the cylinder and the top of the second oil chamber and is used to control the communication / isolation between the cylinder and the second oil chamber. The second transmission piston is slidably connected in the second oil chamber. The two ends of the second connecting member are respectively connected to the bottom of the second transmission piston and the bottom of the secondary damping piston.

[0009] Preferably, the control unit includes a control cylinder, a plunger, an upper push rod, and a lower push rod. The upper part of the control cylinder is fixedly inserted into the cylinder body. The bottom of the cylinder body and the top of the second oil chamber are connected through the control cylinder. The plunger is slidably connected inside the control cylinder to control the connection / isolation of the cylinder body and the second oil chamber. The upper push rod is coaxially fixed to the top of the plunger and extends into the cylinder body. The lower push rod is coaxially fixed to the bottom of the plunger and extends into the cylinder body. The lower end of the lower push rod is elastically connected to the bottom of the control cylinder. In the initial state, the plunger prevents the cylinder block and the second oil chamber from communicating with each other.

[0010] Preferably, there are multiple secondary viscous damping components, which are arranged at equal intervals around the axis of the primary damping cylinder.

[0011] Preferably, the secondary damping cylinders corresponding to multiple secondary viscous damping components are connected end to end by an external oil pipe.

[0012] Preferably, the upper and lower parts of any two adjacent secondary damping cylinders are connected.

[0013] Preferably, the top of the cylinder is provided with a vent hole.

[0014] Preferably, the primary damping cylinder is annular, and there is a preset gap between the outer peripheral wall of the primary damping cylinder and the outer peripheral wall of the cylinder body.

[0015] Preferably, the inner and outer peripheral walls of the primary damping cylinder are provided with a number of heat dissipation fins.

[0016] The beneficial effects of this invention are: This invention comprises a hydraulic cylinder, a primary viscous damping component, a first transmission component, a secondary viscous damping component, and a second transmission component. Under micro-vibration or minor vibration conditions, the first transmission component amplifies the stroke of the hydraulic cylinder and transmits it to the primary viscous damping component, driving the primary viscous damping component to operate and absorb kinetic energy to achieve vibration resistance. Under strong vibration conditions, in addition to the operation of the primary viscous damping component, the second transmission component amplifies the stroke of the hydraulic cylinder and transmits it to the secondary viscous damping component, driving the secondary viscous damping component to operate. At this time, both the primary and secondary viscous damping components absorb kinetic energy simultaneously to improve the vibration resistance effect and prevent the primary viscous damping component from being damaged due to overtravel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a vibration-resistant connection node for a steel structure according to the present invention; Figure 2 This is a schematic diagram of the overall structure of a vibration-resistant connection node for a steel structure according to the present invention; Figure 3 This is a front view of a vibration-resistant connection node for a steel structure according to the present invention; Figure 4 for Figure 3 Sectional view of AA; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point C; Figure 6 for Figure 4 A magnified schematic diagram of the structure at point D; Figure 7 for Figure 3 BB section view; Figure 8 This is an exploded view of a vibration-resistant connection node for a steel structure according to the present invention; Figure 9 This is a schematic diagram of the control unit in a vibration-resistant connection node of a steel structure according to the present invention.

[0018] in: 100. Hydraulic cylinder; 110. Cylinder body; 120. Piston ring; 130. Piston rod; 140. Vent hole; 200. First-stage viscous damping assembly; 210. First-stage damping cylinder; 220. First-stage damping piston; 300, First transmission assembly; 310, First connecting plate; 311, First oil chamber; 320, First transmission piston; 330, First connecting piece; 331, First rod; 332, Second rod; 333, First receiving ring; 400. Second-stage viscous damping assembly; 410. Second-stage damping cylinder; 420. Second-stage damping piston; 500, Second transmission assembly; 510, Second connecting plate; 511, Second oil chamber; 520, Second transmission piston; 530, Second connecting piece; 531, Third rod; 532, Fourth rod; 533, Second receiving ring; 540, Control unit; 541. Control cylinder; 5412. Upper connecting hole; 5413. Lower connecting hole; 544. Piston; 545. Upper push rod; 546. Lower push rod; 547. Upper top plate; 548. Lower top plate; 549. Spring; 600. External oil pipe; 700, heat dissipation fins; 810, column; 820, beam. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] like Figures 1 to 9As shown, a vibration-resistant connection node for a steel structure includes a hydraulic cylinder 100, a primary viscous damping assembly 200, a first transmission assembly 300, a secondary viscous damping assembly 400, and a second transmission assembly 500. The hydraulic cylinder 100 includes a cylinder body 110, a piston ring 120, and a piston rod 130. The piston ring 120 is slidably connected within the cylinder body 110, and the piston rod 130 is coaxially fixed to the piston ring 120. A rod cavity is formed between the piston rod 130 and the cylinder body 110, and the rod cavity is filled with hydraulic oil. The cylinder body 110 is connected to the column 8 of the steel structure. The piston rod 130 is connected to the steel beam 820, preferably by a hinge. The first-stage viscous damping assembly 200 includes a first-stage damping cylinder 210 and a first-stage damping piston 220. The first-stage damping cylinder 210 is located outside the cylinder body 110 and is filled with a damping medium, preferably a synthetic oil-based damping oil such as silicone oil or polyether oil. The first-stage damping piston 220 is slidably connected inside the first-stage damping cylinder 210. The first-stage damping piston 220 is the same as the piston in an existing viscous damper. A plurality of damping orifices are provided, extending along the axis of the primary damping piston 220 and passing through both ends. A first transmission assembly 300 is connected between the hydraulic cylinder 100 and the primary viscous damping assembly 200. The first transmission assembly 300 is configured such that when the piston ring 120 moves, the stroke of the primary damping piston 220 is greater than the stroke of the piston ring 120. The secondary viscous damping assembly 400 includes a secondary damping cylinder 410 and a secondary damping piston 420. The secondary damping cylinder 410 is located outside the cylinder body 110, and the secondary damping piston... The piston ring 420 is slidably connected inside the secondary damping cylinder 410. Similarly, the secondary damping piston 420 is also provided with a number of damping holes. The damping holes extend along the axis of the secondary damping piston 420 and are open at both ends. The second transmission assembly 500 is connected between the hydraulic cylinder 100 and the secondary viscous damping assembly 400. The second transmission assembly 500 is configured to cause the secondary damping piston 420 to move after the piston ring 120 moves past the preset position, and to make the stroke of the secondary damping piston 420 greater than the subsequent stroke of the piston ring 120.

[0023] When the steel structure is subjected to micro-vibrations or small-scale earthquakes, the columns 810 and beams 820 of the steel structure deform under stress, and the distance between them increases / decreases repeatedly. Since the cylinder 110 is connected to the column 810 of the steel structure and the piston rod 130 is connected to the beam 820 of the steel structure, the piston ring 120 moves reciprocally along the axis of the cylinder 110. Since the first transmission assembly 300 is connected between the hydraulic cylinder 100 and the first-stage viscous damping assembly 200, and the first transmission assembly 300 is configured such that when the piston ring 120 moves, the first-stage damping piston 220 moves, the first-stage damping piston 220 also moves reciprocally along the first-stage damping cylinder 210. At this time, the damping medium in the first-stage damping cylinder 210 passes through the damping orifice into the first-stage damping cylinder 210. The damping medium flows back and forth between the top of the first-stage damping piston 220 and the bottom of the first-stage damping piston 220. During this process, a large frictional force is generated between the damping medium and the wall of the damping orifice, which in turn generates a large amount of frictional heat. Thus, the kinetic energy is converted into the internal energy of the damping medium, and the kinetic energy is reduced to achieve the effect of vibration resistance. Since the stroke of the first-stage damping piston 220 is greater than the stroke of the piston ring 120, the distance that the first-stage damping piston 220 moves along the first-stage damping cylinder 210 is greater than the distance that the piston ring 120 moves along the cylinder body 110. This allows more damping medium to flow back and forth between the top and bottom of the first-stage damping piston 220 through the damping orifice, thereby increasing the amount of kinetic energy generated by vibration converted into the internal energy of the damping medium and enhancing the vibration resistance effect.

[0024] When the steel structure is subjected to a strong earthquake, the kinetic energy generated by the vibration is large, and the distance between the column 810 and the beam 820 changes significantly. At this time, the single distance the piston ring 120 moves along the cylinder wall of the cylinder body 110 increases sufficiently to allow the piston ring 120 to pass a preset position. Before the piston ring 120 moves downwards to pass the preset position, only the first-stage damping piston 220 moves along the cylinder wall of the first-stage damping cylinder 210. During this time, the damping medium in the first-stage damping cylinder 210 flows through the damping orifice on the first-stage damping piston 220. After the piston ring 120 moves to pass the preset position, the second transmission assembly 500 causes the second-stage damping piston 420 to move along the cylinder wall of the second-stage damping cylinder 410. At this time, the damping medium in the second-stage damping cylinder 410 flows through the damping orifice onto the second-stage damping piston 420. The viscous damping medium flows between the top and bottom of the vibration. At this time, the kinetic energy generated by the vibration is absorbed by the damping medium flowing through the first-stage damping piston 220 and the second-stage damping piston 420. Therefore, when the steel structure is subjected to strong shock, the damping effect of the viscous damping component is enhanced, avoiding the problem of damage to the first-stage damping cylinder 210 caused by the overtravel of the first-stage damping piston 220. In addition, since the amount of kinetic energy generated by vibration converted into the internal energy of the damping medium per unit time increases, the vibration resistance effect is enhanced, preventing the relative movement distance of the steel structure column 810 and beam 820 from being too large and causing connection failure. Furthermore, since the second transmission component 500 makes the stroke of the second-stage damping piston 420 greater than the subsequent stroke of the piston ring 120, the damping effect can be further enhanced, improving the vibration resistance effect.

[0025] Understandably, when the steel structure is subjected to micro-earthquakes or minor earthquakes, it is equivalent to one damping system remaining operational. At this time, the columns 810 and beams 820 of the steel structure can displace normally within a reasonable range, avoiding stress concentration. The reason why the two "damping systems" do not operate simultaneously is to prevent excessive damping. When the damping effect is too large, it is equivalent to adding extra "constraints" to the columns 810 and beams 820 of the steel structure, which will lead to unnecessary stress concentration inside the steel structure. Long-term action can easily lead to fatigue failure of the connection between the columns 810 and beams 820 of the steel structure. In addition, since the secondary viscous damping component 400 is only put into use when the steel structure is subjected to strong earthquakes, it can extend the service life of the secondary viscous damping component 400.

[0026] In a further embodiment, such as Figure 4 and Figure 5As shown, the first transmission assembly 300 includes a first connecting plate 310, a first transmission piston 320, and a first connecting member 330. The first connecting plate 310 is fixedly connected between the cylinder body 110 and the first-stage damping cylinder 210. A first oil chamber 311 is formed in the first connecting plate 310. The first oil chamber 311 extends along the axis of the cylinder body 110. The bottom of the cylinder body 110 and the top of the first oil chamber 311 are connected. The first transmission piston 320 is slidably connected in the first oil chamber 311. The cross-sectional area of ​​the first transmission piston 320 is smaller than the cross-sectional area of ​​the piston ring 120. The two ends of the first connecting member 330 are respectively connected to the bottom of the first transmission piston 320 and the bottom of the first-stage damping piston 220.

[0027] Since the bottom of the cylinder 110 is connected to the top of the first oil chamber 311, during the reciprocating movement of the piston ring 120, the hydraulic oil in the cylinder 110 is squeezed into the first oil chamber 311 or the hydraulic oil in the first oil chamber 311 is drawn into the cylinder 110. Since the cross-sectional area of ​​the first transmission piston 320 is smaller than that of the piston ring 120, the moving distance of the first transmission piston 320 is greater than that of the piston ring 120 during the reciprocating flow of hydraulic oil in the first oil chamber 311 and the cylinder 110. Since the two ends of the first connecting member 330 are respectively connected to the bottom of the first transmission piston 320 and the bottom of the first-stage damping piston 220, the first transmission piston 320 and the first-stage damping piston 220 move synchronously. The moving distance of the first-stage damping piston 220 is greater than that of the piston ring 120, thus amplifying the stroke and increasing the amount of kinetic energy converted into internal energy per unit time, thereby enhancing the vibration resistance effect.

[0028] Furthermore, such as Figure 4 As shown, the first connecting member 330 includes a first rod 331, a second rod 332, and a first receiving ring 333. The first rod 331 is fixedly connected to the bottom of the first transmission piston 320, the second rod 332 is fixedly connected to the bottom of the first-stage damping piston 220, and the first receiving ring 333 is fixedly connected to the bottom of both the first rod 331 and the second rod 332, thereby realizing the synchronous movement of the first transmission piston 320 and the first-stage damping piston 220.

[0029] In a further embodiment, such as Figure 4 and Figure 6As shown, the second transmission assembly 500 includes a second connecting plate 510, a second transmission piston 520, a second connecting member 530, and a control unit 540. The second connecting plate 510 is fixedly connected between the first-stage damping cylinder 210 and the second-stage damping cylinder 410. A second oil chamber 511 is formed within the second connecting plate 510, extending along the axis of the cylinder body 110. The bottom of the cylinder body 110 and the top of the second oil chamber 511 are connected. The control unit 540 is located between the bottom of the cylinder body 110 and the top of the second oil chamber 511, and is used to control the communication / isolation of the cylinder body 110 and the second oil chamber 511. Specifically, when the piston ring 120 moves downward along the cylinder wall of the cylinder body 110 in a single movement, the distance is insufficient for the piston ring 120 to cross the pre-set distance. When the preset position is reached, the control unit 540 controls the cylinder 110 and the second oil chamber 511 to be in a state of mutual isolation. At this time, the hydraulic oil in the cylinder 110 cannot enter the second oil chamber 511. When the piston ring 120 moves downward by a single movement distance that is sufficient to make the piston ring 120 pass the preset position, the control unit 540 controls the cylinder 110 and the second oil chamber 511 to be in a state of mutual communication. The second transmission piston 520 is slidably connected in the second oil chamber 511. The sum of the cross-sectional area of ​​the second transmission piston 520 and the cross-sectional area of ​​the first transmission piston 320 is less than the cross-sectional area of ​​the piston ring 120. The two ends of the second connecting member 530 are respectively connected to the bottom of the second transmission piston 520 and the bottom of the secondary damping piston 420.

[0030] When the steel structure is subjected to a strong earthquake, the piston ring 120 moves downward along the cylinder wall of the cylinder body 110 by a single distance sufficient to allow the piston ring 120 to pass a preset position. After the piston ring 120 passes the preset position, under the action of the control unit 540, the cylinder body 110 and the second oil chamber 511 are in a state of mutual communication. Then, as the piston ring 120 continues to move downward, the hydraulic oil in the cylinder body 110 is squeezed and enters the first oil chamber 311 and the second oil chamber 511 respectively. The hydraulic oil entering the first oil chamber 311 pushes the first transmission piston 320 to move downward, entering the second oil chamber 511. The hydraulic oil in the second oil chamber 511 pushes the second transmission piston 520 downward. Since the two ends of the second connecting piece 530 are respectively connected to the bottom of the second transmission piston 520 and the bottom of the second-stage damping piston 420, the second transmission piston 520 and the second-stage damping piston 420 move synchronously. Therefore, the kinetic energy generated by the vibration is absorbed by the damping medium flowing through the first-stage damping piston 220 and the second-stage damping piston 420, thus enhancing the damping effect. The amount of kinetic energy generated by the vibration converted into the internal energy of the damping medium per unit time increases, thereby enhancing the vibration resistance. When the piston ring 120 moves upward along the cylinder wall of the cylinder body 110, the cylinder body 110 and the second oil chamber 511 are in a connected state before the piston ring 120 passes the preset position. After the piston ring 120 passes the preset position, the cylinder body 110 and the second oil chamber 511 are in an isolated state. The specific process will not be described in detail.

[0031] Furthermore, since the sum of the cross-sectional areas of the second transmission piston 520 and the first transmission piston 320 is less than the cross-sectional area of ​​the piston ring 120, the moving distances of both the second transmission piston 520 and the first transmission piston 320 are greater than the moving distance of the piston ring 120. Also, since the first connecting piece 330 connects the first transmission piston 320 and the primary damping piston 220, and the second connecting piece 530 connects the second transmission piston 520 and the secondary damping piston 420, the moving distances of both the second transmission piston 520 and the secondary damping piston 420 are greater than the moving distance of the piston ring 120. Because both the secondary damping piston 420 and the primary damping piston 220 have damping holes, the amount of damping medium passing through the damping holes increases per unit time. More kinetic energy is converted into internal energy by the damping medium per unit time, thus enhancing the damping effect. The amount of kinetic energy generated by vibration converted into the internal energy of the damping medium increases, resulting in enhanced vibration resistance and preventing excessive relative movement between the steel structure's columns 810 and beams 820, which could lead to connection failure.

[0032] Furthermore, such as Figure 4 As shown, the second connecting member 530 includes a third rod 531, a fourth rod 532, and a second receiving ring 533. The third rod 531 is fixedly connected to the bottom of the second transmission piston 520, and the fourth rod 532 is fixedly connected to the bottom of the secondary damping piston 420. The lower ends of the third rod 531 and the lower ends of the fourth rod 532 are fixedly connected by the second receiving ring 533.

[0033] In a further embodiment, such as Figure 4 , Figure 5 , Figure 6 and Figure 9As shown, the control unit 540 includes a control cylinder 541, a plunger 542, an upper push rod 543, and a lower push rod 544. The upper part of the control cylinder 541 is fixedly inserted into the cylinder body 110, and the lower part of the control cylinder 541 is located outside the cylinder body 110. The bottom of the cylinder body 110 and the top of the second oil chamber 511 are connected through the control cylinder 541. The plunger 542 is slidably connected inside the control cylinder 541 and is used to control the connection / isolation of the cylinder body 110 and the second oil chamber 511. Specifically, the control cylinder 541 has an upper connecting hole 5411 that penetrates the peripheral wall of the control cylinder 541, and a lower connecting hole 5412 that penetrates the peripheral wall of the control cylinder 541. The control cylinder 541 has a peripheral wall, and the lower connecting hole 5412 is located below the upper connecting hole 5411. The upper push rod 543 is coaxially fixed to the top of the plunger 542 and extends into the cylinder body 110. The lower push rod 544 is coaxially fixed to the bottom of the plunger 542 and extends into the cylinder body 110. The lower end of the lower push rod 544 is elastically connected to the bottom of the control cylinder 541. Specifically, a spring 547 is sleeved on the outside of the lower push rod 544. The upper end of the spring 547 is fixedly connected to the bottom of the control cylinder 541, and the lower end is fixedly connected to the lower end of the lower push rod 544. In the initial state, the plunger 542 prevents the cylinder body 110 and the second oil chamber 511 from communicating with each other.

[0034] Initially, the plunger 542 is in the position of blocking the upper connecting hole 5411. At this time, the hydraulic oil in the piston ring 120 cannot enter the control cylinder 541. Therefore, the cylinder body 110 and the second oil chamber 511 are isolated from each other. After the piston ring 120 moves downward past the preset position, the piston ring 120 pushes the plunger 542 downward through the upper push rod 543 until the plunger 542 no longer blocks the upper connecting hole 5411 and the lower connecting hole 5412. At this time, the inside of the cylinder body 110 is connected to the inside of the second oil chamber 511 through the control cylinder 541. Then, as the piston ring 120 continues to move downward, the hydraulic oil in the cylinder body 110 enters the second oil chamber 511 through the control cylinder 541, pushing the second transmission piston 520 to move. Thus, the second transmission piston 520 drives the second-stage damping piston 420 to move synchronously through the second connecting member 530. Similarly, before the plunger 542 moves upward to the preset position, the second oil chamber 511 is connected to the inside of the cylinder 110. After the plunger 542 moves upward past the preset position, the plunger 542 is in the position of blocking the lower connecting hole 5412. At this time, the upper connecting hole 5411 and the lower connecting hole 5412 are no longer connected. Thus, the cylinder 110 is isolated from the second oil chamber 511 again. At this time, the second transmission piston 520 no longer moves. Since the second connecting piece 530 connects the second transmission piston 520 and the secondary damping piston 420, after the second transmission piston 520 stops moving, the secondary damping piston 420 also stops moving. When the plunger 542 moves upward until the piston ring 120 no longer contacts the upper push rod 543, the plunger 542 returns to the initial position under the action of the spring 547.

[0035] It should also be noted that, such as Figure 4 and Figure 6 As shown, when the steel structure is subjected to strong vibration, when the piston ring 120 moves upward so that the lower push rod 544 abuts against the hinge end of the piston rod 130, as the piston rod 130 continues to move upward, the plunger 542 moves upward synchronously along the inner wall of the control cylinder 541. When the plunger 542 moves to the position above the upper connecting hole 5411, the upper connecting hole 5411 also connects with the lower connecting hole 5412. At this time, the hydraulic oil in the cylinder 110 can also enter the second oil chamber 511 through the control cylinder 541, so that the secondary damping piston 420 moves along the cylinder wall of the secondary damping cylinder 410, thereby enhancing the damping effect and improving the damping efficiency.

[0036] Furthermore, such as Figure 9 As shown, to facilitate the piston ring 120 pushing the upper push rod 543, an upper push plate 545 is provided at the upper end of the upper push rod 543. To facilitate the hinged end of the piston rod 130 pushing the lower push rod 544, a lower push plate 546 is provided at the lower end of the lower push rod 544. The preset position refers to the position where the piston ring 120 is located when its lower end face contacts the upper push plate 545.

[0037] In a further embodiment, there are multiple secondary viscous damping components 400, which are arranged at equal intervals around the axis of the primary damping cylinder 210. Correspondingly, there are also multiple second transmission components 500, which are connected one-to-one with the multiple secondary viscous damping components 400.

[0038] The number of secondary viscous damping components 400 is increased to enhance the damping effect and vibration resistance under strong earthquakes, thereby preventing excessive relative movement between the columns 810 and beams 820 of the steel structure and causing connection failure.

[0039] In a further embodiment, such as Figure 1 As shown, the secondary damping cylinders 410 corresponding to the multiple secondary viscous damping components 400 are connected end to end through external oil pipes 600.

[0040] This configuration is designed to increase the temperature uniformity of the damping medium flowing within the secondary damping cylinder 410. In addition, the external oil pipe 600 further enhances the heat dissipation rate of the damping medium, preventing it from overheating.

[0041] In a further embodiment, such as Figure 1 As shown, the upper and lower parts of any two adjacent secondary damping cylinders 410 are connected.

[0042] This arrangement is intended to create two interconnected loops between the multiple secondary damping cylinders 410, thereby accelerating the heat dissipation of the damping medium.

[0043] In a further embodiment, such as Figure 2 As shown, a vent hole 140 is provided at the top of the cylinder 110. This is to ensure that the pressure inside the cavity of the cylinder 110 above the piston ring 120 is at standard atmospheric pressure, thereby avoiding obstruction to the movement of the piston ring 120.

[0044] In a further embodiment, such as Figure 2 As shown, the first-stage damping cylinder 210 is annular, and there is a preset gap between the outer peripheral wall of the first-stage damping cylinder 210 and the outer peripheral wall of the cylinder body 110.

[0045] Understandably, the first-stage damping cylinder 210 and the cylinder body 110 adopt a compact layout. By making the first-stage damping cylinder 210 a ring structure, the heat dissipation area of ​​the first-stage damping cylinder 210 itself can be greatly increased, effectively avoiding excessively high operating temperature of the damping medium.

[0046] In a further embodiment, such as Figure 2 As shown, the inner and outer peripheral walls of the first-stage damping cylinder 210 are provided with several heat dissipation fins 700.

[0047] The purpose of setting up several heat dissipation fins 700 is to improve the heat dissipation speed of the first-stage damping cylinder 210.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A vibration-resistant connection node for a steel structure, characterized in that, include: A hydraulic cylinder includes a cylinder body, piston rings, and piston rod. The piston rings are slidably connected to the cylinder body, and the piston rod is coaxially fixed to the piston rings. The cylinder body is connected to a column of a steel structure, and the piston rod is connected to a beam of a steel structure. A primary viscous damping assembly includes a primary damping cylinder and a primary damping piston. The primary damping cylinder is located outside the cylinder body, and the primary damping piston is slidably connected inside the primary damping cylinder. The first transmission assembly is connected between the hydraulic cylinder and the first-stage viscous damping assembly; The first transmission assembly is configured such that when the piston ring moves, the first-stage damping piston moves, and the stroke of the first-stage damping piston is greater than the stroke of the piston ring. A secondary viscous damping assembly includes a secondary damping cylinder and a secondary damping piston. The secondary damping cylinder is located outside the cylinder body, and the secondary damping piston is slidably connected inside the secondary damping cylinder. The second transmission assembly is connected between the hydraulic cylinder and the secondary viscous damping assembly; The second transmission component is configured such that when the piston ring moves past a preset position, the secondary damping piston moves, and the stroke of the secondary damping piston is greater than the subsequent stroke of the piston ring.

2. The anti-vibration connection node for a steel structure according to claim 1, characterized in that, The first transmission assembly includes a first connecting plate, a first transmission piston, and a first connecting member. The first connecting plate is fixedly connected between the cylinder body and the first-stage damping cylinder. A first oil chamber is formed in the first connecting plate. The first oil chamber extends along the cylinder body axis. The bottom of the cylinder body and the top of the first oil chamber are connected. The first transmission piston is slidably connected in the first oil chamber. The two ends of the first connecting member are respectively connected to the bottom of the first transmission piston and the bottom of the first-stage damping piston.

3. The anti-vibration connection node for a steel structure according to claim 2, characterized in that, The second transmission assembly includes a second connecting plate, a second transmission piston, a second connecting member, and a control unit. The second connecting plate is fixedly connected between the first-stage damping cylinder and the second-stage damping cylinder. A second oil chamber is formed inside the second connecting plate and extends along the cylinder axis. The bottom of the cylinder and the top of the second oil chamber can communicate with each other. The control unit is located between the bottom of the cylinder and the top of the second oil chamber and is used to control the communication / isolation between the cylinder and the second oil chamber. The second transmission piston is slidably connected in the second oil chamber. The two ends of the second connecting member are respectively connected to the bottom of the second transmission piston and the bottom of the second-stage damping piston.

4. The anti-vibration connection node for a steel structure according to claim 3, characterized in that, The control unit includes a control cylinder, a plunger, an upper push rod, and a lower push rod. The upper part of the control cylinder is fixedly inserted into the cylinder body. The bottom of the cylinder body and the top of the second oil chamber are connected through the control cylinder. The plunger is slidably connected inside the control cylinder and is used to control the connection / isolation of the cylinder body and the second oil chamber. The upper push rod is coaxially fixed to the top of the plunger and extends into the cylinder body. The lower push rod is coaxially fixed to the bottom of the plunger and extends into the cylinder body. The lower end of the lower push rod is elastically connected to the bottom of the control cylinder. In the initial state, the plunger prevents the cylinder block and the second oil chamber from communicating with each other.

5. The anti-vibration connection node for a steel structure according to claim 4, characterized in that, There are multiple secondary viscous damping components, which are arranged at equal intervals around the axis of the primary damping cylinder.

6. The anti-vibration connection node for a steel structure according to claim 5, characterized in that, Multiple secondary damping components are connected end to end via external oil pipes.

7. The anti-vibration connection node for a steel structure according to claim 6, characterized in that, The upper and lower parts of any two adjacent secondary damping cylinders are connected.

8. The anti-vibration connection node for a steel structure according to claim 1, characterized in that, A vent hole is provided on the top of the cylinder.

9. A vibration-resistant connection node for a steel structure according to claim 1, characterized in that, The primary damping cylinder is annular, and there is a preset gap between the outer peripheral wall of the primary damping cylinder and the outer peripheral wall of the cylinder body.

10. A vibration-resistant connection node for a steel structure according to claim 9, characterized in that, The inner and outer peripheral walls of the primary damping cylinder are provided with several heat dissipation fins.

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