CN110350459B - Transmission line strain insulator tower damping damper and mounting structure thereof - Google Patents

Transmission line strain insulator tower damping damper and mounting structure thereof Download PDF

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Publication number
CN110350459B
CN110350459B CN201910621089.6A CN201910621089A CN110350459B CN 110350459 B CN110350459 B CN 110350459B CN 201910621089 A CN201910621089 A CN 201910621089A CN 110350459 B CN110350459 B CN 110350459B
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wedge
shaped metal
rings
tower
power transmission
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CN110350459A (en
Inventor
卜祥航
曹永兴
谢强
吴驰
朱军
刘凤莲
薛志航
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Electric Power Research Institute of State Grid Sichuan Electric Power Co Ltd
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Electric Power Research Institute of State Grid Sichuan Electric Power Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00Overhead installations of electric lines or cables
    • H02G7/02Devices for adjusting or maintaining mechanical tension, e.g. take-up device
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00Overhead installations of electric lines or cables
    • H02G7/14Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound

Abstract

The invention discloses a transmission line strain tower damping damper and a mounting structure thereof, wherein the damping damper comprises an outer barrel, a plurality of wedge-shaped metal outer rings and wedge-shaped metal inner rings which are matched with each other are arranged in the outer barrel along the axial direction, the wedge-shaped metal inner rings are positioned on the inner sides of the wedge-shaped metal outer rings, a gap is formed between every two adjacent wedge-shaped metal outer rings or/and the wedge-shaped metal inner rings, a first stop block and a pressing and holding mechanism are distributed in the outer barrel along the axial direction, the first stop block is used for stopping the wedge-shaped metal outer rings and the wedge-shaped metal inner rings, and the pressing and holding mechanism is used for applying acting force to. The invention aims to provide a tension tower damping damper of a power transmission line and an installation structure thereof, which are used for solving the problem that the damping structure in the prior art needs to change the dynamic characteristic of the power transmission tower and is only suitable for the power transmission line which is not built, and achieving the purposes of not changing the dynamic characteristic of the power transmission tower and having strong damping applicability.

Description

Transmission line strain insulator tower damping damper and mounting structure thereof
Technical Field
The invention relates to the field of transmission line towers, in particular to a strain tower damping damper of a transmission line and an installation structure thereof.
Background
Electric power plays a significant role in national economic construction. The transmission tower is an important component in a power transmission system, is a carrier for load electric energy transmission, and is also an important lifeline structural project. Different from the common civil engineering structure, the combined type wind power generation tower has the common characteristics of a tower-shaped high-rise structure and a large-span structure, such as high tower body structure, large span, strong flexibility and the like, wherein the most remarkable characteristic is that the combined type wind power generation tower is a continuous body formed by connecting various power transmission towers through conducting wires, is sensitive to the response of disaster loads such as earthquakes and the like, and is easy to damage and collapse under the action of the disaster loads.
Referring to fig. 1 and 2, a common power transmission line structure is that a lead and a ground wire are tensioned between cross arms of adjacent tension towers through insulator strings. With the development of power transmission and transformation projects in China towards high voltage, ultrahigh voltage and extra-high voltage, a power transmission line needs a higher electrical gap, so that a single structure of a power transmission tower becomes higher and softer, and the flexible structure has good anti-seismic performance according to experience. However, in the earthquake, the phenomena of collapse of a power transmission tower and falling of a ground conducting wire are frequent, so that the whole power transmission line is paralyzed, and direct economic loss in billions is caused; the lack of electric power further hinders the development of rescue operations and home reconstruction, and more secondary disasters can be caused.
The disaster phenomenon is not consistent with the characteristic of good anti-seismic performance of a flexible structure, because a power transmission line is supported and fixed on a power transmission tower which is divided into a vertical tower and a strain tower, the vertical tower suspends the power transmission line through an insulator, the strain tower stretches the power transmission line through the insulator, and the strain tower bears unbalanced tension in a lead and a ground wire. Under the action of earthquake, the adjacent power transmission towers are deformed inconsistently, and the conducting wire and the ground wire are continuously tensioned to generate huge unbalanced tension and are transmitted to the strain tower to generate huge impact load. The insulator string connecting the lead and the power transmission tower is a brittle material, has poor impact resistance and ductility and is easy to break in an earthquake; the tension tower is of a steel truss structure, the anti-seismic performance is good, unbalanced tension is transmitted to the cross arm in an earthquake, huge impact load borne by the tension tower is enabled to be large, the height of the cross arm is relatively high due to the fact that the requirement of an electrical gap is met, two factors are combined to generate huge bending moment at the root of a tower leg, and the tower leg is enabled to buckle and collapse.
For the damage condition of the transmission line in the earthquake, some researchers carry out damping research on the transmission tower structure. Some researchers at home and abroad all are provided with the elasticity stiffener between tower leg and between tower leg and the adjacent mounting groove inner wall, are provided with the lid on the opening, are provided with on the lid with tower leg assorted hole, are provided with buffer gear between the upper surface of body of the tower and base. The power transmission tower which consumes energy and absorbs shock through the elastic reinforcing rods and the buffer mechanism changes the dynamic characteristics of the power transmission tower, needs holes at the corresponding parts of the power transmission tower rod pieces for connecting the reinforcing rods, and is only suitable for the power transmission line which is not built.
Disclosure of Invention
The invention aims to provide a tension tower damping damper of a power transmission line and an installation structure thereof, which are used for solving the problem that the damping structure in the prior art needs to change the dynamic characteristic of the power transmission tower and is only suitable for the power transmission line which is not built, and achieving the purposes of not changing the dynamic characteristic of the power transmission tower and having strong damping applicability.
The invention is realized by the following technical scheme:
the utility model provides a transmission line strain insulator tower damping damper, includes the urceolus, set up a plurality of wedge metal outer rings, the wedge metal inner ring that match each other along the axis direction in the urceolus, the wedge metal inner ring is located the inboard of wedge metal outer ring, and has the clearance between two adjacent wedge metal outer rings or/and the wedge metal inner ring, along axis direction distribution dog one in the urceolus, press and hold the mechanism, dog one is used for blockking wedge metal outer ring, wedge metal inner ring, press and hold the mechanism and be used for applying the effort along urceolus axial direction for wedge metal outer ring, wedge metal inner ring.
Aiming at the problems that the damping structure in the prior art needs to change the power characteristics of a power transmission tower and is only suitable for an electric transmission line which is not built, the invention provides a strain tower damping damper of the electric transmission line, and the energy consumption principle is that the dissipation of seismic energy is realized by utilizing the friction between an inner ring and an outer ring of a wedge-shaped metal: gaps exist between adjacent wedge-shaped metal inner rings and adjacent wedge-shaped metal outer rings of the shock absorption damper in an initial state, friction force exists on a wedge-shaped cross section, when external force overcomes the friction force, the wedge-shaped metal inner rings and the wedge-shaped metal outer rings slide, the gaps are compressed, the wedge-shaped metal inner rings and the wedge-shaped metal outer rings are extruded and expand, relative sliding occurs along the axial direction of the outer barrel, the friction force performs a function in a sliding process, and kinetic energy is converted into heat, so that the effect of weakening earthquake input energy is achieved. After the earthquake, the axial force disappears, the extrusion and expansion of the wedge-shaped metal inner ring and the wedge-shaped metal outer ring disappear, and the invention can be restored to the initial state. The first check block is used for stopping and limiting the wedge-shaped metal outer ring and the wedge-shaped metal inner ring from one side, and the pressing and holding mechanism is used for transmitting external axial acting force to the wedge-shaped metal outer ring and the wedge-shaped metal inner ring, so that a gap between the wedge-shaped metal outer ring and the wedge-shaped metal inner ring can be extruded conveniently when external force acts. The energy dissipation and shock absorption device consumes energy through a large number of wedge-shaped metal outer rings and wedge-shaped metal inner rings in the outer barrel, and has good energy dissipation and shock absorption effects: the damper is used in a strain tower, under the action of an earthquake, huge unbalanced tension generated in a wire is transmitted to the damper, so that the damper is in a working state under the action of axial force, dissipation of earthquake energy is realized by utilizing friction between an inner ring and an outer ring of wedge-shaped metal inside the damper, and an impact load applied to a cross arm of the strain tower by the wire is reduced, so that the earthquake response of the strain tower is reduced, and a good energy dissipation and shock absorption effect is achieved. The invention has simple structure, convenient installation and strong applicability, and can be applied to the connection of the insulator string and the tension tower cross arm, thus being applied to the power transmission line which is not built and the power transmission line which is built, without the need of hole-forming transformation of the structure of the power transmission tower and changing the dynamic characteristic of the power transmission tower.
Preferably, the pressing and holding mechanism comprises a main shaft, one end of the main shaft is inserted into the outer cylinder, an extrusion wedge block is sleeved on the main shaft, the extrusion wedge block is adjacent to the wedge-shaped metal outer ring and the wedge-shaped metal inner ring, a second stop block is arranged on one side of the extrusion wedge block, which is far away from the direction of the wedge-shaped metal outer ring and the direction of the wedge-shaped metal inner ring, the main shaft penetrates through the second stop block, a fastening piece is further sleeved on the main shaft, and the fastening piece presses. The main shaft is used for being connected with the outside and transmitting external force to the inside of the shock absorption damper. When external force acts on the main shaft, the main shaft moves towards the inside of the outer cylinder, the extrusion wedge block is pushed by the fastening piece to move inwards, the extrusion wedge block extrudes the wedge-shaped metal outer ring and the wedge-shaped metal inner ring, so that the inner gap of the extrusion wedge block is compressed, and the process of metal friction energy consumption is realized.
And a matched sliding wedge block is arranged outside the extrusion wedge block, and the sliding wedge block is meshed with the extrusion wedge block. The sliding wedge block can slide towards the radial direction relative to the extrusion wedge block, and the outer side of the sliding wedge block is blocked by the inner wall of the outer barrel, so that the extrusion wedge block is accurately positioned through the sliding wedge block, and the sliding wedge block and the extrusion wedge block are meshed with each other to play a limiting role.
The spindle further comprises a spring sleeved on the spindle, and the spring is located between the first stop block and the second stop block. When the fastener presses and presses the extrusion wedge block, the spring is also pressed and pressed, and further energy consumption is realized through the conversion of elastic potential energy. And after the external force disappears, the elastic force of the spring pushes the extrusion wedge block and the fastener to reset, so that the automatic resetting of the invention is realized.
The end of the main shaft, which is positioned outside the outer barrel, and the end, which is far away from the extension direction of the main shaft, of the outer barrel are both provided with connecting plates, and the connecting plates are provided with mounting holes. Is convenient to be connected with the electric tower.
The utility model provides a transmission line strain insulator tower damping damper's mounting structure, includes strain insulator tower, set up strain insulator tower cross arm on the strain insulator tower, damping damper's both ends are connected with strain insulator tower cross arm tip, insulator cluster respectively.
Preferably, the conducting wire and the ground wire are tensioned between the adjacent transmission towers through the insulator string.
Preferably, the two ends of the shock absorption damper are respectively hinged with the end part of the tension tower cross arm and the insulator string through spherical hinges.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the shock absorption damper for the tension tower of the power transmission line and the mounting structure of the shock absorption damper, under the action of an earthquake, huge unbalanced tension generated in a lead is transmitted to the damper, so that the damper is in a working state under the action of axial force, dissipation of earthquake energy is realized by using friction between an inner ring and an outer ring of wedge-shaped metal inside the damper, and an impact load applied to a cross arm of the tension tower by the lead is reduced, so that the earthquake response of the tension tower is reduced, and a good energy dissipation and shock absorption effect is achieved. The invention has simple structure, convenient installation and strong applicability, and can be applied to the connection of the insulator string and the tension tower cross arm, thus being applied to the power transmission line which is not built and the power transmission line which is built, without the need of hole-forming transformation of the structure of the power transmission tower and changing the dynamic characteristic of the power transmission tower.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art electric tower;
FIG. 2 is a schematic diagram of a cross-arm junction of a prior art electrical tower;
FIG. 3 is a schematic structural view of a shock absorbing damper according to an embodiment of the present invention;
FIG. 4 is a partial schematic view of a shock absorbing damper in accordance with an embodiment of the present invention;
FIG. 5 is a schematic illustration of an installation of an embodiment of the present invention;
FIG. 6 is a schematic view of a cross-arm junction of an electrical tower in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of the operation of the wedge-shaped metal inner ring and the wedge-shaped metal outer ring according to the embodiment of the present invention;
FIG. 8 is a view showing an overall deformation of the wedge-shaped metal inner ring and the wedge-shaped metal outer ring according to the embodiment of the present invention;
FIG. 9 is a hysteresis curve of a wedge-shaped metal inner ring and a wedge-shaped metal outer ring according to an embodiment of the present invention;
FIG. 10 is a hysteresis curve of the shock absorber damper under the action of an external force according to the embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-strain tower, 2-strain tower cross arm, 3-insulator string, 4-ground wire, 5-lead, 6-shock absorber, 7-wedge metal outer ring, 8-wedge metal inner ring, 9-outer cylinder, 10-spring, 11-extrusion wedge block, 12-fastener, 13-sliding wedge block, 14-second block, 15-first block, 16-main shaft and 17-connecting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
the utility model provides a transmission line strain insulator tower damper, includes urceolus 9, its characterized in that, set up a plurality of wedge metal outer loop 7, the wedge metal inner ring 8 that match each other along the axis direction in the urceolus 9, wedge metal inner ring 8 is located the inboard of wedge metal outer loop 7, and has the clearance between two adjacent wedge metal outer loops 7 or/and the wedge metal inner ring 8, along axis direction distribution dog 15, pressure hold the mechanism in the urceolus 9, dog 15 is used for blockking wedge metal outer loop 7, wedge metal inner ring 8, the pressure is held the mechanism and is used for exerting the effort along urceolus 9 axial direction for wedge metal outer loop 7, wedge metal inner ring 8.
The invention is designed by considering that the vibration control object is power equipment, the requirement on the damping scheme is higher, and the damper is synthesized by multiple factors such as performance, stability, cost and the like. The energy dissipation device consists of an outer cylinder, a wedge-shaped metal inner ring and a wedge-shaped metal outer ring, and the energy dissipation principle is that the dissipation of seismic energy is realized by utilizing the friction of the inner wedge-shaped metal ring. Wherein said outer cylinder 9 is preferably a metal outer cylinder. Under the action of pressure, the wedge-shaped metal outer ring 7 and the wedge-shaped metal inner ring 8 are extruded and expanded, relative sliding occurs along the axial direction of the damper, friction force works in the sliding process, conversion of kinetic energy to heat energy is achieved, the effect of weakening earthquake motion input energy is achieved, when the force disappears, the extrusion and expansion of the metal rings disappear, and the damper can be restored to the initial state.
Example 2:
the utility model provides a transmission line strain insulator tower damping damper, on embodiment 1's basis, press and hold the mechanism and include that one end inserts the main shaft 16 to the inside of urceolus 9, extrusion voussoir 11 is established to the cover on the main shaft 16, extrusion voussoir 11 is adjacent with wedge metal outer loop 7, wedge metal inner loop 8, and one side that wedge metal outer loop 7, wedge metal inner loop 8 place orientation were kept away from to extrusion voussoir 11 sets up dog two 14, main shaft 16 passes dog two 14, still overlaps on the main shaft 16 and establishes fastener 12, fastener 12 presses and holds extrusion voussoir 11. And a matched sliding wedge block 13 is arranged outside the extrusion wedge block 11, and the sliding wedge block 13 is meshed with the extrusion wedge block 11. The spring 10 is sleeved on the main shaft 16, and the spring 10 is located between the first stop block 15 and the second stop block 14. One end of the main shaft 16, which is positioned outside the outer cylinder 9, and one end of the outer cylinder 9, which is far away from the extending direction of the main shaft 16, are both provided with a connecting plate 17, and the connecting plate 17 is provided with a mounting hole.
The internal force of the damper in the present embodiment can be considered to be constituted by the elastic force and the frictional force of the spring. Gaps exist between the inner and outer wedge-shaped metal rings, friction force exists on the wedge-shaped cross sections, when external force overcomes the friction force, the metal rings slide, the gaps are compressed, and in the process, the friction force does work to dissipate energy, as shown in fig. 7. When all the gaps between the inner and outer rings of the wedge-shaped metal are compacted, the damper is deformed to the limit to form a steel column with a large limit bearing capacity, as shown in fig. 8, the left side is in an initial state, and the right side is in a loading state. In the state on the right in fig. 8, the damper can no longer be deformed in the force direction, and no energy dissipation capability is available in the force direction, so that this should be avoided as much as possible. In fig. 7, θ is the angle of the contact surface between the inner and outer rings of the wedge-shaped metal, de is the longitudinal compression amount of the damper, and Δ R + Δ R is the transverse compression amount of the damper. The relationship between the relative deformation and the longitudinal expansion amount between the inner and outer rings of the wedge-shaped metal is as follows: Δ R + Δ R ═ deX tan θ. In the operating state, the frictional force of the damper increases with increasing deformation. In order to ensure that the damper does not slide under the action of small loads such as breeze and the like and prevent the metal rings from falling off from each other, a pre-pressure F is axially applied to the metal rings of the damper through springs0As the initial slip force of the damper. In the whole movement process, no matter the damper generates displacement in any direction, the wedge-shaped metal inner and outer rings in the damper are always in a pressed state. The hysteresis curve of the metal ring is shown in FIG. 9, the abscissa represents the overall displacement of the damper, the ordinate represents the internal force of the metal ring, and F represents the internal force of the metal ringLoading force, FfFor friction, Fe is the spring force and F is the unload force.
When the external force is greater than the pre-pressure, the damper will slide, so the overall hysteresis curve of the damper is flag-shaped, as shown in fig. 10. When the pre-pressure is larger than the static friction force between the inner ring and the outer ring of the wedge-shaped metal of the damper, the damper has the self-resetting capability, and when the external force disappears, the damper can restore the initial non-deformation state. During the application of force, frictional force FfThe direction is consistent with the damping motion direction, and the elastic force Fe is consistent with the deformation direction of the damper all the time, so the direction of the friction force is consistent with the direction of the elastic force in the loading process, and the direction of the friction force is suddenly changed in the unloading process and is opposite to the elastic force. The damper has the energy consumption effect that the shaded area accounts for the percentage of the area enclosed by the loading force and the abscissa axis in fig. 10, that is, when the unloading force F2/F1 is 1/3, the energy consumption effect of the damper of the embodiment is 66.67%. In fig. 10, the abscissa is damper deformation and the ordinate is force, k1 represents loading stiffness, k2 represents unloading stiffness, F1 represents loading force, F2 represents unloading force, F3578 represents loading stiffness, F3932 represents unloading stiffness, and F2 represents unloading forcefThe friction force is Fe, and the elastic force is Fe.
Example 3:
the utility model provides a transmission line strain insulator tower damping damper's mounting structure, includes strain insulator tower 1, set up strain insulator tower cross arm 2 on the strain insulator tower 1, damping damper 6's both ends are connected with 2 tip of strain insulator tower cross arm, insulator string 3 respectively. And the conducting wire 5 and the ground wire 4 are tensioned between the adjacent power transmission towers through the insulator strings 3. The two ends of the shock absorption damper 6 are respectively hinged with the end part of the strain tower cross arm 2 and the insulator string 3 through spherical hinges.
Under the action of earthquake, the tension tower 1 and the cross arm thereof can displace, and further the lead 5 and the ground wire 4 are tensioned to generate impact load on the adjacent tension tower 1 connected with the tension tower; after the impact load passes through the installed shock absorption damper 6, the damper 6 is in a working state under the action of axial force, gaps exist between the inner and outer wedge-shaped metal rings of the damper in an initial state, the friction force exists on the wedge-shaped section, when the external force overcomes the friction force, the metal rings slide, the inner wedge-shaped sliding block 13 pushes the spring 10 to move between the first stop block 15 and the second stop block 14, the gap is compressed, the wedge-shaped metal outer ring 7 and the wedge-shaped metal inner ring 8 are extruded and expanded, the inner spring 10 is extruded and compressed, relative sliding is generated along the axial direction of the damping damper 6, the friction force works in the sliding process, the kinetic energy is converted into the heat energy, and therefore the effect of weakening the earthquake motion input energy is achieved, namely, the impact load of the lead 5 and the ground wire 4 on the cross arm of the adjacent tension tower 1 is reduced due to the installation of the shock-absorbing damper 6.
After the earthquake, the tension tower 1, the tension tower cross arm 2, the lead 5 and the ground wire 4 are all restored to the original positions, the extrusion and expansion of the inner wedge-shaped metal ring and the outer wedge-shaped metal ring disappear after the axial force disappears, the spring 10 restores to the original length, and the damping damper 6 can be restored to the original state.
The adopted damping damper 6 is used for ensuring that the sliding phenomenon does not occur under the action of small loads such as breeze and the like and applying pre-pressure along the axial direction of the metal rings of the damper in order to prevent the metal rings from falling off from each other, and the pre-pressure is used as the initial sliding force of the damper. The initial starting sliding force of the adopted damping damper 6 is matched with the tension of the transmission tower section lead 5 and the ground wire 4; the adopted damping damper 6 generates relative slippage along the axial direction, and the deformation capacity is matched with the displacement limit value of the power transmission tower 1. The internal force of the adopted damping damper 6 is formed by the elastic force of a spring 10 and the friction force of a metal ring, and the selection of the mass and the rigidity of the spring 10 is matched with the optimal vibration period of the damper and the strain tower; the metal ring assembly comprises a wedge-shaped metal outer ring 7 and a wedge-shaped metal inner ring 8, and the diameters of the inner ring and the outer ring are matched with each other.
Compared with the prior art, the embodiment has the following advantages:
(1) simple structure, simple to operate, the suitability is strong: the damping damper is applied to the connection of the insulator string and the tension tower cross arm, can be applied to an unfinished power transmission line and can also be applied to a finished power transmission line, the structure of the power transmission tower does not need to be perforated and modified, the dynamic characteristic of the power transmission tower is not changed, and only the damping damper is additionally arranged between the insulator string and the tension tower cross arm;
(2) the energy dissipation shock attenuation is effectual: the damping damper device is used for the tension tower, after huge unbalanced tension generated in the lead is transmitted to the damper under the action of an earthquake, the damper is in a working state under the action of axial force, dissipation of earthquake energy is realized by using friction of a wedge-shaped metal ring inside the damper, and impact load applied to a cross arm of the tension tower by the lead is reduced, so that the earthquake response of the tension tower is reduced, and a good energy dissipation and damping effect is achieved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (6)

1. The shock absorption damper for the tension tower of the power transmission line comprises an outer cylinder (9), and is characterized in that a plurality of wedge-shaped metal outer rings (7) and wedge-shaped metal inner rings (8) which are matched with each other are arranged in the outer cylinder (9) along the axial direction, the wedge-shaped metal inner rings (8) are positioned on the inner side of the wedge-shaped metal outer rings (7), gaps are formed between every two adjacent wedge-shaped metal outer rings (7) or/and the wedge-shaped metal inner rings (8), a first stop block (15) and a pressing mechanism are distributed in the outer cylinder (9) along the axial direction, the first stop block (15) is used for blocking the wedge-shaped metal outer rings (7) and the wedge-shaped metal inner rings (8), and the pressing mechanism is used for applying acting force along the axial direction of the outer cylinder (9) to the wedge-shaped;
the pressing and holding mechanism comprises a main shaft (16) with one end inserted into the outer cylinder (9), an extrusion wedge block (11) is sleeved on the main shaft (16), the extrusion wedge block (11) is adjacent to the wedge-shaped metal outer ring (7) and the wedge-shaped metal inner ring (8), a second stop block (14) is arranged on one side of the extrusion wedge block (11) far away from the direction of the wedge-shaped metal outer ring (7) and the direction of the wedge-shaped metal inner ring (8), the main shaft (16) penetrates through the second stop block (14), a fastening piece (12) is further sleeved on the main shaft (16), and the extrusion wedge block (11) is pressed and held by the fastening piece (;
the spindle is characterized by further comprising a spring (10) sleeved on the spindle (16), wherein the spring (10) is located between the first stop block (15) and the second stop block (14); in the initial state, the spring (10) is under tension.
2. The shock absorption damper for tension tower of power transmission line according to claim 1, wherein a matched sliding wedge (13) is arranged outside the extrusion wedge (11), and the sliding wedge (13) is engaged with the extrusion wedge (11).
3. The shock absorption damper for the tension tower of the power transmission line according to claim 1, wherein a connecting plate (17) is arranged at one end of the main shaft (16) positioned outside the outer cylinder (9) and one end of the outer cylinder (9) far away from the extension direction of the main shaft (16), and a mounting hole is formed in the connecting plate (17).
4. The mounting structure of the shock absorption damper of the tension tower of the power transmission line based on any one of claims 1 to 3, characterized by comprising the tension tower (1), wherein a tension tower cross arm (2) is arranged on the tension tower (1), and two ends of the shock absorption damper (6) are respectively connected with the end part of the tension tower cross arm (2) and the insulator string (3).
5. The mounting structure of the shock absorption damper of the tension tower of the power transmission line according to claim 4, wherein the conducting wire (5) and the ground wire (4) are tensioned between the adjacent power transmission towers through the insulator string (3).
6. The mounting structure of the shock absorption damper of the tension tower of the power transmission line according to claim 5, wherein two ends of the shock absorption damper (6) are hinged with the end part of the tension tower cross arm (2) and the insulator string (3) through spherical hinges respectively.
CN201910621089.6A 2019-07-10 2019-07-10 Transmission line strain insulator tower damping damper and mounting structure thereof Active CN110350459B (en)

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CN111641175A (en) * 2020-06-29 2020-09-08 国网河北省电力有限公司电力科学研究院 Self-adaptive damper
CN112260197B (en) * 2020-09-17 2021-09-07 同济大学 Hydraulic damper-based connecting device for power transmission tower and insulator

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CN107093881A (en) * 2017-05-02 2017-08-25 东北电力大学 A kind of damping unit for being used to suppress electric transmission line isolator windage yaw
CN107642575A (en) * 2017-11-02 2018-01-30 华东交通大学 A kind of automobile Double-drum type shock absorber of high reliability

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CN104482108A (en) * 2014-12-05 2015-04-01 国家电网公司 Centering friction damper special for column-type electrical equipment
CN105387115A (en) * 2015-12-24 2016-03-09 北京工业大学 Dual-compressed-spring flat plate type-centripetal variable friction damper
CN107093881A (en) * 2017-05-02 2017-08-25 东北电力大学 A kind of damping unit for being used to suppress electric transmission line isolator windage yaw
CN107642575A (en) * 2017-11-02 2018-01-30 华东交通大学 A kind of automobile Double-drum type shock absorber of high reliability

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