Vibration suppression device for steel tube tower component

By installing a fixed part, a sliding guide part and a magnetic field body on the steel pipe tower, the vibration energy is converted into electric heating energy by using the principle of hysteresis damping, the vortex vibration problem of the steel pipe tower in low wind speed environment is solved, and better results are achieved vibration suppression effect and safety.

CN119221748APending Publication Date: 2024-12-31CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD
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Patent Information

Application Number
CN202411359453.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-27
Publication Date
2024-12-31

AI Technical Summary

Technical Problem

The inclined materials and auxiliary materials in steel pipe towers are prone to vortex vibration under low wind speed environments, resulting in fatigue and breakage of the tower materials. The existing technology, such as the support rod and spoiler, is limited or the cost is high, and the anti-vibration hammer effect needs further verification.

Method used

A vibration suppression device including a fixed part, a sliding guide part and a magnetic field body is designed. The magnetic inductive line is cut in the magnetic field through a conductor, and the vibration energy is converted into electric heating energy using the principle of hysteresis damping to achieve vibration suppression.

Benefits of technology

The device consumes strong energy and has a large damping, has better vibration suppression effect, is easy to install, and has little modification to the original structure, effectively reducing the vortex vibration of the steel pipe tower and improving safety and stability.

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Abstract

The invention provides a steel tube tower component vibration suppression device which comprises a fixing part fixedly connected with a steel tube tower component; the sliding guide part is fixed on the fixing part; the magnetic field body is fixedly connected with the fixing part and forms a magnetic field; the conductor is fixed on the sliding guide part through sliding fit, and at least part of the conductor is arranged in the magnetic field; the magnetic field body forms a magnetic field around the conductor, when the magnetic field body is vibrated, the conductor vibrates to cut magnetic induction lines, induced electromotive force is generated, then electromagnetic eddy current is generated, and vibration energy is converted into electric heat energy to be consumed. The device forms vibration damping through the hysteresis effect, is fixed to the steel pipe component and absorbs energy transmitted by steel pipe vibration, the vortex-induced vibration strength of the steel pipe component is further reduced, an original structure is slightly changed, installation is easier and more convenient, energy consumption is high, damping is large, and the better vibration suppression effect is achieved.
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Description

Technical Field

[0001] The invention relates to the technical field of electric power protection, and in particular to a vibration suppression device for a steel pipe tower component. Background Art

[0002] Some oblique materials and auxiliary materials with large slenderness in the steel pipe tower of overhead transmission lines are prone to generate Karman vortex streets when the wind speed is low. The vortex streets produce high-frequency periodic forces on the steel pipes, which stimulate the components to produce vortex-induced vibrations perpendicular to the wind direction. Since the line is in this low wind speed environment for a long time, this continuous vibration may cause the tower connection bolts to loosen or the components to fatigue and fail. In addition, due to the vibration coupling effect, this will also affect the vibration-proof effect of the ground wire. At present, there are reports in many places that the oblique materials and auxiliary materials of the ultra-high voltage steel pipe tower have vortex-induced vibrations, resulting in fatigue fracture of the tower materials, threatening the safe and stable operation of the steel pipe tower.

[0003] At present, in structural design, this vortex-induced wind vibration is mainly suppressed by limiting the critical wind speed of the first-order vibration of the component to not exceed a certain limit. In response to the vortex-induced vibration of steel pipe tower components, support rods are installed to support the vibrating components; spoilers are also used to destroy the airflow around the steel pipe components and prevent the generation of Karman vortex streets; some experts have proposed the installation of anti-vibration hammers on steel pipe components, similar to suppressing the breeze vibration of overhead transmission lines, to reduce component vibration.

[0004] However, it was found during the application process that the support rods would affect the original form of the structure, change the original force transmission path, and cause new structural problems. At the same time, the installation cost of the support rods is high. The auxiliary materials and diagonal materials for the steel pipe towers in different directions need to be designed separately, which consumes a lot of manpower and material resources. The spoiler has a certain spoiling effect on the airflow, but the actual application results show that the spoiler cannot completely suppress the vortex-induced vibration of other components of the steel pipe, and the tower materials installed with the spoiler still have vibration fatigue damage problems. The anti-vibration hammer is more used for vibration suppression of overhead lines, and the effect of suppressing vibration of steel pipe tower components needs to be further verified. Summary of the invention

[0005] In order to solve the problem of steel pipe fracture caused by vortex-induced vibration of auxiliary materials of steel pipe tower in the prior art, the present invention proposes a vibration suppression device for steel pipe tower components, comprising:

[0006] A fixing part, fixedly connected to the steel pipe tower member;

[0007] A sliding guide portion, fixed to the fixing portion;

[0008] A magnetic field body, connected and fixed to the fixing part and forming a magnetic field;

[0009] The conductor is fixed to the sliding guide portion by sliding fit and at least a part of the conductor is placed in the magnetic field.

[0010] Preferably, the conductor is a non-magnetic metal.

[0011] Preferably, the magnetic field body comprises: two magnet fixing plates arranged at intervals and two magnets respectively fixed to the magnet fixing plates; a magnetic field is formed between the two magnets;

[0012] One ends of the two magnet fixing plates are connected to the fixing portion, and the sliding guide portion and the conductor are located in the interval between the two magnet fixing plates, and there are gaps between the two magnet fixing plates and the two sides.

[0013] Preferably, the magnets on the two magnet fixing plates are arranged with opposite poles.

[0014] Preferably, the magnet fixing plate comprises: a clamping plate shell connected to the fixing portion at the top and a magnet mounting plate connected to the bottom of the clamping plate shell and symmetrically arranged at the left and right ends;

[0015] The magnet is mounted on the magnet mounting plate to form magnetic fields at the left and right ends of the bottom of the clamping shell.

[0016] Preferably, the magnet mounting plate is provided with an inwardly recessed fixing position, and the magnet is fixed in the fixing position by means of screws.

[0017] Preferably, the sliding guide portion comprises: a hammer buckle fixed on the fixing portion for slidingly fixing the conductor; and one end of the hammer buckle has a guiding through hole.

[0018] Preferably, a sliding rod is provided in the middle of the conductor; the sliding rod is slidably matched with the guide through hole.

[0019] Preferably, the cross section of the sliding rod is rectangular.

[0020] Preferably, the fixing portion comprises a steel pipe buckle; the steel pipe buckle is clamped on the steel pipe tower, and the sliding guide portion is fixedly connected to the steel pipe buckle.

[0021] Preferably, the steel pipe clip includes two semicircular groove components that are relatively buckled.

[0022] Preferably, a rubber damping sheet is provided on the inner side of the semicircular groove of the semicircular groove body member.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a vibration suppression device for steel pipe tower components, comprising: a fixed part, fixedly connected to the steel pipe tower component; a sliding guide part, fixed to the fixed part; a magnetic field body, connected and fixed to the fixed part and forming a magnetic field; a conductor, fixed to the sliding guide part by sliding fit and at least part of the conductor is placed in the magnetic field. The fixed part installs the device on the steel pipe tower to sense the vibration generated by the steel pipe tower, and transmits the vibration to the conductor in the magnetic field to cut the magnetic flux line; the sliding guide part is used to connect the conductor to the fixed part, and suspend the conductor in the magnetic field body. The magnetic field generated by the magnetic field body is located around the conductor. When vibration occurs, the conductor vibrates in the magnetic field and cuts the magnetic flux line. The hysteresis damping principle is applied to form an induced electromotive force through the conductor cutting the magnetic flux line, and then generate electromagnetic eddy current, and the vibration energy is converted into electric heat energy and consumed; the device has strong energy consumption, large damping, and better vibration suppression effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the steel pipe tower component vibration suppression device of the present invention;

[0026] Figure 2 It is a cross-sectional view of the steel tube tower member vibration suppression device of the present invention;

[0027] Figure 3 A top view of the steel tube tower member vibration suppression device of the present invention;

[0028] Figure 4 A bottom view of the steel tube tower member vibration suppression device of the present invention;

[0029] Figure 5 It is a front view of the steel tube tower member vibration suppression device of the present invention;

[0030] Figure 6 It is a side view of the steel tube tower member vibration suppression device of the present invention;

[0031] Figure 7 It is a schematic structural diagram of a magnet fixing plate of a steel pipe tower component vibration suppression device of the present invention;

[0032] Fig. 9 It is a schematic diagram of the swing hammer buckle structure of the steel pipe tower component vibration suppression device of the present invention;

[0033] Figure 8 It is a schematic diagram of the conductor structure of the steel pipe tower component vibration suppression device of the present invention;

[0034] Fig.10 It is a schematic diagram of the steel pipe buckle structure of the steel pipe tower component vibration suppression device of the present invention;

[0035] Among them, 101 is a conductor, 102 is a hammer buckle, 2 is a clamp shell, 201 is a magnet mounting plate, and 3 is a steel pipe buckle. DETAILED DESCRIPTION

[0036] Embodiment 1:

[0037] A vibration suppression device for a steel tube tower component, such as Figure 1 As shown, including:

[0038] A fixing part, fixedly connected to the steel pipe tower member;

[0039] A sliding guide portion, fixed to the fixing portion;

[0040] A magnetic field body, connected and fixed to the fixing part and forming a magnetic field;

[0041] The conductor 101 is fixed to the sliding guide portion by sliding fit and at least a portion of the conductor 101 is placed in the magnetic field.

[0042] like Figure 2 As shown, the fixing part is installed on the steel pipe tower component, and one side of the fixing part is connected to the sliding guide part and the magnetic field body respectively. Figure 3 or Figure 4 As shown, the sliding guide part is located between the magnetic field bodies, and one end of the sliding guide part away from the fixed part is connected to a conductor 101, and part of the conductor 101 is located in the magnetic field.

[0043] The fixing part is used to fix the position of the device, such as Figure 5 As shown, the sliding guide part transmits the vibration generated by the steel tube tower to the conductor 101 connected to one side. When the steel tube tower vibrates, the conductor 101 will also vibrate. Figure 6 As shown, the conductor 101 is located in the magnetic field formed by the magnetic field body. When the conductor 101 vibrates due to the steel pipe tower, the magnetic flux lines are cut in the magnetic field, and the energy generated by the vibration is consumed by cutting the magnetic flux lines to achieve vibration suppression.

[0044] The conductor 101 cuts the magnetic flux lines in the magnetic field. The hysteresis damping principle is applied to form an induced electromotive force by cutting the magnetic flux lines through the conductor 101, thereby generating electromagnetic eddy currents, and converting the vibration energy into electric heat energy for consumption.

[0045] Compared with the traditional anti-vibration hammer, the device consumes more energy, has greater damping, and has a better vibration suppression effect. Compared with the method of adding a support rod, the present invention is easier to install and has little change to the original structure.

[0046] Preferably, the conductor 101 is a non-magnetic metal.

[0047] The conductor 101 is a heavy object made of non-magnetic metal, which generates resonance when the steel pipe tower vibrates. At the same time, the non-magnetic metal can cut the magnetic induction line to generate an induced electromotive force, and then generate electromagnetic eddy current, realizing the conversion of vibration energy into electrical heat energy.

[0048] like Figure 7 As shown, the magnetic field body comprises: two magnet fixing plates arranged at intervals and two magnets respectively fixed on the magnet fixing plates; a magnetic field is formed between the two magnets;

[0049] One ends of the two magnet fixing plates are connected to the fixing portion, and the sliding guide portion and the conductor 101 are located in the interval between the two magnet fixing plates, and there are gaps between the two magnet fixing plates and the two sides.

[0050] There is a gap of a certain width in the middle of the two magnet fixing plates arranged at intervals, the sliding guide part is arranged in the gap, magnets are provided on the magnet fixing plates on both sides of the sliding guide part, and the two oppositely arranged magnets form a magnetic field. The conductor 101 connected to the sliding guide part is located in the middle of the magnetic field, and is spaced apart from the magnets on both sides and does not contact the magnets on both sides. When vibration occurs, the conductor 101 swings back and forth between the two magnets to cut the magnetic lines of force.

[0051] Preferably, the magnets on the two magnet fixing plates are arranged with opposite poles.

[0052] Two magnets disposed opposite to each other are arranged on the two magnet fixing plates on the left and right sides in the form of opposite poles, forming an electromagnetic field on the left and right sides of the conductor 101 .

[0053] The magnet may preferably be a cylindrical magnetic object.

[0054] Preferably, the magnet fixing plate comprises: a clamping plate shell 2 whose top is connected to the fixing portion and a magnet mounting plate 201 connected to the bottom of the clamping plate shell 2 and symmetrically arranged at the left and right ends;

[0055] The magnet is mounted on the magnet mounting plate 201 to form magnetic fields at the left and right ends of the bottom of the splint shell 2 respectively.

[0056] The splint shell 2 is an isosceles trapezoidal plate body, and a connecting hole is provided on the upper bottom of the isosceles trapezoidal plate body, which is connected to the fixing part through the connecting hole. The left and right ends of the lower bottom of the isosceles trapezoidal plate body are respectively connected to magnet mounting plates 201, and the magnet mounting plates 201 are used to mount magnets.

[0057] The two magnet fixing plates are arranged opposite to each other, and the magnets in the magnet mounting plate 201 are also arranged opposite to each other, forming two magnetic fields at the left and right ends of the lower bottom of the isosceles trapezoidal plate respectively, and the conductor 101 is located in the magnetic fields at the left and right ends respectively to cut the magnetic flux lines.

[0058] Preferably, the magnet mounting plate 201 is provided with an inwardly recessed fixing position, and the magnet is fixed in the fixing position by screws.

[0059] One side of the magnet mounting plate 201 is provided with an inwardly recessed fixing position, the shape of which is preferably circular, the same as the shape of the magnet. The magnet is fixed in the fixing position by self-tapping screws in a "cross" shape to prevent the magnetic material from slipping off.

[0060] like Figure 8 As shown, the sliding guide portion includes: a hammer buckle 102 fixed on the fixing portion for slidingly fixing the conductor 101; one end of the hammer buckle 102 has a guiding through hole.

[0061] The swing hammer buckle 102 has a connecting plate at one end and a buckle at the other end. The connecting plate has a fixing hole through which it is fixed to the fixing part using screws. The buckle has a guide through hole, and the direction of the guide through hole is parallel to the axis of the connected steel pipe tower body.

[0062] like Fig. 9 As shown, a sliding rod is provided in the middle of the conductor 101; the sliding rod is slidably matched with the guide through hole.

[0063] The slide rod passes through the guide through hole and is connected to the swing hammer buckle 102. Conductors 101 are provided at both ends of the slide rod. When the steel pipe tower vibrates, the conductors 101 at both ends of the slide rod act as weights and resonate with the vibration of the steel pipe tower, vibrating up and down in the magnetic field to cut the magnetic lines of force.

[0064] Preferably, the cross section of the sliding rod is rectangular.

[0065] The slide bar is in the form of a rectangular steel bar, the middle of which is fixed on the swing hammer buckle 102, and the rectangular steel bar is arranged with its wide side facing up and down to ensure that the conductor 101 swings up and down in the vertical direction.

[0066] like Fig.10 As shown, the fixing portion includes a steel pipe buckle 3; the steel pipe buckle 3 is clamped on the steel pipe tower, and the sliding guide portion is fixedly connected to the steel pipe buckle 3.

[0067] The fixing portion uses a steel pipe clip 3 as a fixed connection component. The size of the steel pipe clip 3 matches the steel pipe connected to the steel pipe tower and needs to be firmly fixed on the steel pipe. It can be adjusted or replaced according to the size of the steel pipe.

[0068] Preferably, the steel pipe clip 3 includes two semicircular groove components that are relatively buckled.

[0069] The steel pipe clip 3 is composed of two semicircular grooves that are relatively buckled and arranged, both ends of the semicircular grooves are fixed by screws, and the middle of one end clamps the sliding guide part, and the two outer sides are connected to the magnetic field body respectively.

[0070] Preferably, a rubber damping sheet is provided on the inner side of the semicircular groove of the semicircular groove body member.

[0071] A rubber damping sheet can be installed on the inner side of the steel pipe buckle 3 to enhance the friction between the steel pipe buckle 3 and the steel pipe and prevent the device from slipping along the steel pipe.

[0072] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A vibration suppression device for a steel tube tower member, characterized in that: include: A fixing part, fixedly connected to the steel pipe tower member; A sliding guide portion, fixed to the fixing portion; A magnetic field body, connected and fixed to the fixing part and forming a magnetic field; The conductor (101) is fixed to the sliding guide portion by sliding fit, and at least a portion of the conductor (101) is placed in the magnetic field.

2. A steel tube tower member vibration suppression device as claimed in claim 1, characterized in that: The conductor (101) is a non-magnetic metal.

3. A steel tube tower member vibration suppression device as claimed in claim 1, characterized in that: The magnetic field body comprises: two magnet fixing plates arranged at intervals and two magnets respectively fixed on the magnet fixing plates; a magnetic field is formed between the two magnets; One end of the two magnet fixing plates is connected to the fixing part, and the sliding guide part and the conductor (101) are located in the interval between the two magnet fixing plates, and there are gaps between the two magnet fixing plates.

4. A steel tube tower member vibration suppression device as claimed in claim 3, characterized in that: The magnets on the two magnet fixing plates are arranged in a manner of opposite poles.

5. A steel tube tower member vibration suppression device as claimed in claim 4, characterized in that: The magnet fixing plate comprises: a clamping plate shell (2) whose top is connected to the fixing portion, and a magnet mounting plate (201) connected to the bottom of the clamping plate shell (2) and symmetrically arranged at the left and right ends; The magnet is mounted on the magnet mounting plate (201) to form magnetic fields at the left and right ends of the bottom of the clamping shell (2).

6. A steel tube tower member vibration suppression device as claimed in claim 5, characterized in that: The magnet mounting plate (201) is provided with an inwardly recessed fixing position, and the magnet is fixed in the fixing position by means of screws.

7. A steel tube tower member vibration suppression device as claimed in claim 1, characterized in that: The sliding guide portion comprises: a swing hammer buckle (102) fixed on the fixing portion and used for slidingly fixing the conductor (101); one end of the swing hammer buckle (102) is provided with a guide through hole.

8. A steel tube tower member vibration suppression device as claimed in claim 7, characterized in that: A sliding rod is provided in the middle of the conductor (101); the sliding rod is slidably matched with the guide through hole.

9. A steel tube tower member vibration suppression device as claimed in claim 8, characterized in that: The cross section of the sliding rod is rectangular.

10. The steel tube tower member vibration suppression device according to claim 1, characterized in that: The fixing part comprises a steel pipe buckle (3); the steel pipe buckle (3) is clamped on the steel pipe tower, and the sliding guide part is fixedly connected to the steel pipe buckle (3).

11. A steel tube tower member vibration suppression device as claimed in claim 10, characterized in that: The steel pipe buckle (3) comprises two semicircular groove components which are buckled relative to each other.

12. A steel tube tower member vibration suppression device as claimed in claim 11, characterized in that: A rubber damping sheet is arranged on the inner side of the semicircular groove of the semicircular groove body component.