Power transmission tower node rapid assembly multidirectional energy dissipation reinforcing device and method

Abstract

The application provides a power transmission tower node fast assembly multidirectional energy dissipation reinforcing device and method, which comprises a first energy dissipation device, a second energy dissipation device and a fixing device, the reinforcing device comprises a plurality of reinforcing plates which are detachably connected to the inner and outer sides of the angle steel to be reinforced; the reinforcing device on one side is connected with the first energy dissipation device, the first energy dissipation device internally comprises three cavities, the left and right cavities are symmetrical closed cavities which are separated by a partition plate, a universal hinge is arranged in the middle cavity, and an energy dissipation assembly is arranged in the closed cavity; the second energy dissipation device comprises a cylinder, the cylinder is filled with a magneto-rheological fluid, an energized coil is wound outside the cylinder, one end of the cylinder is connected with a cavity ball through a piston rod, and the other end is connected with the reinforcing device on the other side through a universal hinge. The application can realize the fast disassembly and installation of the reinforcing device, has the multidirectional energy dissipation and vibration reduction functions, and can adjust the energy dissipation effect in real time according to the size of the vibration frequency.

Description

Technical Field

[0001] This invention belongs to the field of transmission tower node reinforcement technology, specifically relating to a rapid assembly multi-directional energy dissipation reinforcement device and method for transmission tower nodes. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, the main reinforcement measures for transmission tower nodes are to add additional components at critical transmission nodes to improve the overall stress performance of these nodes.

[0004] However, due to the special nature of the transmission tower structure, simply adding components to the connection point between the crossarm and the tower body to improve the load-bearing performance of the node is a rather limited approach. While it increases the load-bearing capacity, it does not have an energy dissipation effect. Furthermore, the connection between the node components is quite complex, making it inconvenient to install ordinary components. At the same time, traditional node reinforcement measures do not have self-adjustment capabilities when encountering complex weather conditions, and their adaptability is relatively limited. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a method for rapidly assembling a multi-directional energy-dissipating reinforcement device for transmission tower nodes. This invention enables rapid disassembly and installation of the reinforcement device, and possesses multi-directional energy-dissipating and vibration-damping functions. Furthermore, it can adjust the energy dissipation effect in real time according to the magnitude of the vibration frequency.

[0006] According to some embodiments, the present invention adopts the following technical solution:

[0007] A rapid assembly multi-directional energy dissipation reinforcement device for transmission tower nodes includes a first energy dissipation device, a second energy dissipation device, and a fixing device, wherein:

[0008] The reinforcement device includes several reinforcement plates, which are detachably connected to the inner and outer sides of the angle steel to be reinforced;

[0009] The reinforcement device on one side is connected to the first energy dissipation device. The first energy dissipation device includes three cavities. The left and right cavities are symmetrical sealed cavities separated by a partition plate. The middle cavity is a semi-open cavity at the bottom. A universal hinge is provided in the middle cavity. The universal hinge includes two symmetrical semi-circular arc plates and a hollow ball set in the semi-circular arc plates. A friction pad is provided between the semi-circular arc plates and the hollow ball. The sealed cavity is connected to the outer end of the corresponding arc plate through a shaft. An energy dissipation component is provided in the sealed cavity.

[0010] The second energy dissipation device comprises a cylinder, fixed inclined grooves at both ends inside the cylinder, the cylinder is filled with magnetorheological fluid, the cylinder is wrapped with a coil, one end of the cylinder is connected with the cavity ball through a piston rod, and the other end is connected with the reinforcing device on the other side through a universal hinge.

[0011] As an alternative embodiment, the cavity ball is internally provided with an iron ball, the outer end of each circular arc plate is connected with the corresponding sealed cavity through a shaft rod, a permanent magnet is arranged on the shaft rod, and a rectifier and a power supply are arranged in the middle cavity.

[0012] As an alternative embodiment, the shaft rod end of the sealed cavity is provided with a connecting plate, a ball screw is fixed on one side of the connecting plate, and the other side is connected with the inner side of the isolation plate through a spring, the ball screw and the threaded rod are embedded with each other, a small fan blade is fixed on the threaded rod, and the sealed cavity is filled with damping liquid.

[0013] As a further embodiment, the permanent magnets arranged on the shaft rod are magnetically opposite, forming negative stiffness, and the spring is a shape memory alloy spring, providing positive stiffness, and the two together form a positive and negative stiffness system.

[0014] As a further embodiment, the ball screw and the threaded rod are embedded with each other, providing support and constraint on one side of the threaded rod.

[0015] As a further embodiment, a sealing plug is arranged between the isolation plate and the shaft rod.

[0016] As an alternative embodiment, the cavity ball rotates within the space formed by the two semicircular arc plates within a certain degree of freedom, and can push the corresponding circular arc plate and the shaft rod to move horizontally with its rotation.

[0017] As an alternative embodiment, one end of the second energy dissipation device is fixed by a universal hinge, and the other end is fixed by a universal hinge formed by two semicircular arc plates, forming a double universal hinge structure.

[0018] As an alternative embodiment, the second energy dissipation device is wrapped with a coil outside the cylinder, and the coil is connected with the rectifier and the power supply in the first energy dissipation device.

[0019] Further, a pressure sensor is arranged at the bottom of the cylinder, and the amount of current of the coil is adjusted according to the data feedback by the pressure sensor.

[0020] As an alternative embodiment, the closer the fixed inclined groove is to the two ends, the smaller the space cross-sectional area is, and a pipeline is left in the middle of the fixed inclined groove and connected with the hollow pipeline arranged outside the cylinder, and the hollow pipelines on both sides and the pipelines in the fixed inclined groove form a loop.

[0021] Based on the working method of the power transmission tower node rapid assembly multidirectional energy dissipation reinforcing device, when the cross arm of the power transmission tower is subjected to external force and vibrates up and down and left and right, the first energy dissipation device is driven to vibrate along with the cross arm, and energy is dissipated by internal friction of the first energy dissipation device;

[0022] The iron balls in the cavity balls collide with each other to dissipate energy in the rotating process, the cavity balls drive the shaft rod to move horizontally, the permanent magnet fixed on the shaft rod and the permanent magnet fixed in the first energy dissipation device form a pair of repelling permanent magnet pairs, and the two permanent magnets form negative stiffness when the shaft rod moves, and energy is dissipated;

[0023] The movement of the cavity balls drives the piston rod of the second energy dissipation device to press the magnetorheological fluid up and down, the damping property of the magnetorheological fluid is adjustable, and the inertia energy dissipation effect is adjustable.

[0024] Compared with the prior art, the power transmission tower node energy dissipation reinforcing device has the following beneficial effects:

[0025] 1. The energy dissipation node reinforcing device has the first energy dissipation device and the L-shaped reinforcing plate fixed to each other, and has the dual functions of reinforcing and energy dissipation; at the same time, the L-shaped reinforcing plate can be freely placed at each weak part of the reinforced member because it is fixed by bolts, and is very convenient to disassemble and install;

[0026] 2. The energy dissipation node reinforcing device can convert the up and down vibration of the cross arm of the power transmission tower into other energy dissipation modes through the hollow balls and the arc reinforcing plate in the first energy dissipation device; when the structure vibrates, the cavity balls rotate and rub against the inner wall of the arc plate to dissipate energy; at the same time, the cavity balls push the arc plates and the shaft rod to move horizontally, and then push the ball screw to move and drive the fan blades to rotate to dissipate energy; at the same time, the cavity balls collide with each other to realize multiple energy dissipation;

[0027] 3. The energy dissipation node reinforcing device has the first energy dissipation device, and the permanent magnets of the first energy dissipation device are opposite in magnetism to provide negative stiffness and promote movement; at the same time, the shape memory alloy spring on one side of the reinforcing plate provides positive stiffness, the spring deforms to dissipate energy and ensures the recovery of the device, and the positive and negative stiffness systems greatly increase the energy dissipation effect;

[0028] 4. The energy dissipation node reinforcing device has the fixed inclined groove in the second energy dissipation device, so that when the piston moves up and down, the cross-sectional area of the liquid advances continuously decreases, and then the pressure of the liquid at the end is greater, the speed of the liquid in the hollow pipe is faster, and the inertia effect is more significant;

[0029] 5. The energy dissipation node reinforcing device has the liquid in the second energy dissipation device being the magnetorheological fluid, and the sensor at the bottom adjusts the current in the external coil through the size of the vibration frequency, thereby affecting the magnetic field of the internal liquid, changing the viscosity of the magnetorheological fluid, and achieving the effect of self-adjusting energy dissipation.

[0030] 6. The energy dissipation device of the present application is connected by universal hinges at both ends, which enables the cross arm of the power transmission tower to move up and down, left and right, front and back, and enables the piston rod to move up and down and the first energy dissipation device to move left and right, thereby achieving multi-directional energy dissipation.

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are used for detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0033] Figure 1 It is an installation schematic diagram of a kind of power transmission tower node quick assembly multi-directional energy dissipation reinforcing device;

[0034] Figure 2 It is the overall schematic diagram of a kind of power transmission tower node quick assembly multi-directional energy dissipation reinforcing device;

[0035] Figure 3 It is the positive schematic diagram of first energy dissipation device;

[0036] Figure 4 It is the A-A section schematic diagram of first energy dissipation device;

[0037] Figure 5 It is the B-B section schematic diagram of first energy dissipation device;

[0038] Figure 6 It is the C-C section schematic diagram of first energy dissipation device;

[0039] Figure 7 It is the positive schematic diagram of second energy dissipation device;

[0040] Figure 8 It is the universal hinge installation schematic diagram of reinforcing device;

[0041] Figure 9 It is the circuit schematic diagram;

[0042] 1. Reinforcing bolt; 2. L-shaped reinforcing plate; 3. Permanent magnet; 4. Isolation plate; 5. Buffer pad; 6. Threaded rod; 7. Fan blade; 8. Shell; 9. Shaft; 10. Semi-circular arc plate; 11. Friction gasket; 12. Small iron ball; 13. Piston rod; 14. Cavity ball; 15. Sealing plug; 16. Connecting plate; 17. Ball screw; 18. Ball; 19. Shape memory alloy spring; 20. Power supply; 21. Rectifier; 22. Limiting sleeve; 23. Fixed inclined groove; 24. Energized coil; 25. Piston; 26. Pressure sensor; 27. Hollow pipe; 28. Damping cylinder; 29. Magneto-rheological fluid; 30. Connecting rod; 31. Universal ball; 32. Reinforced angle steel; 33. Universal hinge connecting device. DETAILED DESCRIPTION

[0043] The application will be further described below in conjunction with the drawings and examples.

[0044] It should be noted that the following detailed description is illustrative only and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0045] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0046] In the present application, the terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the convenience of describing the structural relationship of the components or elements of the present application, and cannot be understood as a limitation on the present application.

[0047] In the present application, the terms such as "fixedly connected", "connected", "connected" should be understood broadly, which means that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant researchers or technicians in the art, the specific meaning of the above terms in the present application can be determined according to the specific circumstances, and cannot be understood as a limitation on the present application.

[0048] An implementation

[0049] The present embodiment provides a kind of power transmission tower node fast assembly multi-direction energy dissipation reinforcing device, such asFigure 1 As shown, it comprises reinforcing device, first energy dissipation device, second energy dissipation device; reinforcing device consists of two L-shaped reinforcing plate 2 and a number of reinforcing bolts 1; two L-shaped reinforcing plate 2 is placed closely on the inside and outside of the reinforced angle steel 32, and is fixed by reinforcing bolts 1.

[0050] The lower L-shaped reinforcing plate 2 is fixedly connected with the shell 8 of the first energy dissipation device, and the first energy dissipation device is divided into two symmetrical sealed cavities and a middle semi-open cavity by the isolation plate 4. The middle semi-open cavity consists of two symmetrical semicircular arc plates 10 and a cavity ball 14, which forms a universal hinge device. The cavity ball 14 is filled with small iron balls 12, the lower end of the cavity ball 14 is connected with the piston rod 13, the inner side of the semicircular arc plate 14 is attached with a friction gasket 11, the outer side of the semicircular arc plate 14 is connected with a shaft 9, the surface of the shaft 9 is fixedly connected with a permanent magnet 3, and the other permanent magnet 3 is fixedly connected to the inner surface of the shell 8, forming a repelling permanent magnet pair. The shaft 9 extends through the isolation plate 4 into one side of the sealed cavity, the end of the shaft 9 is fixedly connected with a connecting plate 16, the outer side of the connecting plate 16 is fixedly connected with a ball screw 17, the inner side of the connecting plate 16 is connected with the inner side of the isolation plate 4 through a shape memory alloy spring 19, and the connecting part of the isolation plate 4 and the shaft 9 is provided with a sealing plug 15.

[0051] The ball screw 17 is embedded with the threaded rod 6, the other end of the threaded rod 6 is embedded with the semicircular groove in the center of the buffer pad 5, the middle part of the threaded rod 6 is provided with a fan blade 7, and the two sealed cavities are filled with viscous liquid. At the same time, the power supply 20 and the rectifier 21 are placed near the isolation plate 4 in the middle semi-open cavity.

[0052] The upper end of the second energy dissipation device is connected with the first energy dissipation device through the piston rod 13, the piston rod 13 extends into the damping cylinder 28, the connecting part of the piston rod 13 and the upper end of the damping cylinder 28 is provided with a limiting sleeve 22, the inside of the damping cylinder is filled with magnetorheological fluid 29, the upper and lower ends of the inside of the damping cylinder 28 are provided with fixed inclined grooves 23, the middle of the fixed inclined grooves 23 is connected with the outer hollow pipe 27 through a fine pipeline, a pressure sensor 26 is fixedly connected to the inner bottom of the damping cylinder 28, the outer part of the damping cylinder 28 is wound with a power coil 24, one end of the power coil 24 is connected with the power supply 20 and the rectifier 21 in the first energy dissipation device, the other end is connected with the pressure sensor 26 at the bottom, the lower end of the damping cylinder 28 is fixedly connected with a connecting rod 30, the other end of the connecting rod 30 is connected with a universal ball 31.

[0053] The universal hinge connecting device 33 is fixedly connected with the L-shaped reinforcing plate 2 on the side, and the L-shaped reinforcing plate 2 is fixed on the side of the reinforced angle steel 32 through the reinforcing bolts 1, the universal ball 31 and the universal hinge connecting device 33 are embedded together to form a universal hinge.

[0054] As Figure 1 shown, the first energy dissipation device is fixed on the cross arm of the transmission tower through the L-shaped reinforcing plate 2, which not only provides a fixing function but also provides auxiliary reinforcement for the angle steel of the weak part. The upper and lower ends of the second energy dissipation device are fixed between the cross arm and the tower body of the transmission tower through the universal hinge device, and the connection part between the second energy dissipation device and the tower body is fixed with the universal hinge connection device 33.

[0055] When the cross arm of the transmission tower is subjected to external forces and vibrates up and down and left and right, the first energy dissipation device will follow the vibration of the cross arm, and the cavity balls 14 will rotate under the pushing action of the external force. The friction between the cavity balls 14 and the friction pads 11 on the inner surface of the semicircular arc plate 10 will generate energy dissipation, and at the same time, a part of the dissipated energy will be transmitted to the rectifier 21 through the coil and stored in the power supply 20 in the form of electric energy, realizing self-sufficiency of energy. The small iron balls 12 inside the cavity balls 14 will collide with each other and dissipate energy during the rotation process, and at the same time, the cavity balls 14 will push the shaft 9 to move horizontally. At the same time, the permanent magnet 3 fixed on the upper part of the shaft 9 and the permanent magnet 3 fixed inside the first energy dissipation device form a pair of repelling permanent magnet pairs, and when the shaft 9 moves, the two permanent magnets 3 will form negative stiffness, promoting the movement of the shaft 9, and thus accelerating energy dissipation.

[0056] The shaft 9 penetrates the isolation plate 4 and extends into the sealed cavity on both sides of the first energy dissipation device. The top end of the shaft 9 is fixed with a connecting plate 16, and the contact part of the shaft 9 and the isolation plate 4 is provided with a sealing plug 15. The outer side of the connecting plate 16 is fixed with a ball screw 17, and the ball 18 in the ball screw 17 is embedded with the thread of the threaded rod 6. Under the action of external force, the shaft 9 moves to push the connecting plate 16 to move, and then the ball screw 17 moves, the ball screw 17 drives the threaded rod 6 to rotate, and then the small fan blades 7 on the threaded rod 6 rotate, stirring the damping liquid in the sealed cavity, converting the horizontal movement into the rotary motion of the fan blades, and realizing the inerter energy dissipation.

[0057] At the same time, a buffer pad is arranged inside the sealed cavity to prevent excessive impact force from damaging the sealed cavity. A shape memory alloy spring is arranged on the other side of the connecting plate 6 and connected to the inner side of the isolation plate 4, which can provide positive stiffness for the structure and realize self-recovery of the device. At the same time, the spring will also dissipate energy during deformation.

[0058] The first energy dissipation device is connected with the second energy dissipation device through the piston rod 13, the piston rod extends into the damping cylinder 28, the piston rod top is fixed with the piston 25, the piston rod and the damping cylinder 28 contact part are provided with the limiting sleeve 22, the damping cylinder 28 is filled with the magnetorheological fluid 29, the upper and lower surfaces in the damping cylinder 28 are provided with the fixed inclined groove 23, when the cross arm of the power transmission tower vibrates, the cavity ball 14 movement will drive the piston rod to extrude the liquid, when the liquid is extruded to the fixed inclined groove 23, due to the cross-sectional area reduction, the liquid pressure at both ends will be larger, the liquid will flow into the hollow pipe 27 outside at a faster speed through the inclined groove small hole, the principle of inerter is realized to realize more efficient energy dissipation; meanwhile, the pressure sensor 26 at the bottom of the damping cylinder 28 will control the current size of the external winding coil 24 through the measured liquid pressure, and then the magnetic flux change of the whole device will be affected, the damping of the magnetorheological fluid is changed, and the self-regulation of the energy dissipation effect is realized.

[0059] The universal ball 31 at the bottom of the second energy dissipation device and the universal hinge connecting device 33 fixed on the tower body main material jointly form a universal hinge, and the cavity ball 14 and the piston rod 13 also form a universal hinge, the double universal hinge structure makes the whole device can realize vibration energy dissipation in each direction, and is not limited to single direction energy dissipation.

[0060] The above only describes the preferred embodiments of the present application and is not used to limit the present application, for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art without creative labor within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fast assembly multi-directional energy dissipation reinforcing device for a power transmission tower node, characterized in that, The reinforcing device comprises a plurality of reinforcing plates which are detachably connected to the inner and outer sides of the angle steel to be reinforced. The reinforcing device on one side is connected with the first energy dissipation device, the first energy dissipation device internally comprises three cavities, the left and right cavities are symmetrical sealed cavities separated by a partition plate, the middle cavity is a semi-open cavity at the bottom, a universal hinge is arranged in the middle cavity, the universal hinge comprises two symmetrical semi-circular arc plates and a cavity ball arranged in the semi-circular arc plate, a friction pad is arranged between the semi-circular arc plate and the cavity ball, the sealed cavities are connected to the outer ends of the corresponding circular arc plates through shaft rods, and an energy dissipation assembly is arranged in the sealed cavities; The second energy dissipation device comprises a cylinder, both ends of the cylinder internally have fixed inclined grooves, the cylinder is filled with magnetorheological fluid, the outer part of the cylinder is wound with a power coil, one end of the cylinder is connected with the cavity ball through a piston rod, and the other end is connected with the reinforcing device on the other side through a universal hinge; The cavity ball internally contains an iron ball, the outer end of each circular arc plate is connected to the corresponding sealed cavity through a shaft rod, a permanent magnet is arranged on the shaft rod, a rectifier and a power supply are arranged in the middle cavity, a permanent magnet is fixed on the surface of the shaft rod, and another permanent magnet is fixed on the inner surface of the shell, thereby forming a repulsive permanent magnet pair; The shaft end of the sealed cavity is provided with a connecting plate, a ball screw is fixed on one side of the connecting plate, and the other side is connected to the inner side of the partition plate through a spring, the ball screw and a threaded rod are embedded with each other, a small fan blade is fixed on the threaded rod, and the sealed cavity is filled with damping liquid; The closer the fixed inclined groove is to the two ends, the smaller the space cross-sectional area is, a pipeline is left in the middle of the fixed inclined groove and connected with the hollow pipeline arranged outside the cylinder, and the hollow pipelines on the two sides and the pipeline in the fixed inclined groove form a loop. The permanent magnets arranged on the shaft rod are magnetically opposite, forming negative stiffness, the spring is a shape memory alloy spring, providing positive stiffness, and the two together form a positive and negative stiffness system; 2. The fast assembly multi-directional energy dissipation reinforcing device for power transmission tower joints according to claim 1, characterized in that, The ball screw and the threaded rod are embedded with each other, providing one side support and constraint for the threaded rod. Sealing plugs are arranged between the partition plate and the shaft rod.

3. The fast assembly multi-directional energy dissipation strengthening device of a power transmission tower node according to claim 1, characterized in that, The cavity ball rotates in the space formed by the two semi-circular arc plates within a certain degree of freedom, and can push the corresponding circular arc plate and the shaft rod to move horizontally with the rotation.

4. The fast assembly multi-directional energy dissipation strengthening device of a power transmission tower node according to claim 1, characterized in that, The second energy dissipation device is fixed at one end by a universal hinge and at the other end by a universal hinge formed by two semi-circular arc plates, forming a double universal hinge structure.

5. The fast assembly multi-directional energy dissipation strengthening device of a power transmission tower node according to claim 1, characterized in that, The cylinder of the second energy dissipation device is wound with a power coil, and the coil is connected with the rectifier and the power supply in the first energy dissipation device; 6. The fast assembly multi-directional energy dissipation strengthening device of a power transmission tower node according to claim 1, characterized in that, Or, a pressure sensor is arranged at the bottom of the cylinder, and the amount of current of the power coil is adjusted according to the data feedback by the pressure sensor. Comprise:

7. The working method for quickly assembling the multi-directional energy dissipation reinforcement device of the tower node according to any one of claims 1-6, characterized in that, When the cross arm of the power transmission tower is subjected to external force and vibrates up and down and left and right, the first energy dissipation device is driven to vibrate with the cross arm, and energy is dissipated by friction in the first energy dissipation device; ​ And the iron ball inside the cavity ball collides with each other to consume energy in the rotation process, the cavity ball pushes the shaft horizontally, the fixed permanent magnet on the shaft and the fixed permanent magnet inside the first energy consumption device form a pair of repelling permanent magnet, when the shaft moves, the two permanent magnets form negative stiffness and consume energy; The movement of the cavity ball drives the piston rod of the second energy consumption device to press the magnetorheological fluid up and down, and the damping property of the magnetorheological fluid is adjustable, so that the energy consumption effect of the inertial damper is adjustable.

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