CN112681862A - Shock isolation device for power transmission tower base and mounting method thereof - Google Patents
Shock isolation device for power transmission tower base and mounting method thereof Download PDFInfo
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- CN112681862A CN112681862A CN202011493288.2A CN202011493288A CN112681862A CN 112681862 A CN112681862 A CN 112681862A CN 202011493288 A CN202011493288 A CN 202011493288A CN 112681862 A CN112681862 A CN 112681862A
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- 230000035939 shock Effects 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 title claims abstract description 27
- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000005265 energy consumption Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 230000000717 retained effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The invention discloses a shock isolation device for a base of a power transmission tower and an installation method of the shock isolation device, and belongs to the field of support parts of power transmission towers. The device comprises a first support plate, a second support plate, a steel wire rope isolator and a linear damper. Wherein first backup pad is connected with the basis, and the second backup pad is fixed in and treats structurally with first backup pad parallel arrangement of keeping apart, remains the interval between the backup pad, and multiunit wire rope shock isolator and at least one linear damper setting are between first and second backup pad, and the attenuator is the angle setting. Compared with the traditional single shock isolator, the shock isolator has better applicability and stability and low maintenance cost in the whole life cycle.
Description
Technical Field
The invention belongs to the technical field of transmission tower shock insulation devices, and particularly relates to a transmission tower base shock insulation device and an installation method thereof, which are particularly suitable for eccentric structures.
Background
Ground support structures or devices are susceptible to various forms of loading during their use, including seismic and environmental load inputs (e.g., wind loads). The transmission tower is a typical structure with a high center of gravity, and in practical engineering, the transmission tower is often in an asymmetric eccentric structure form due to condition limitation and functional requirements. Under the action of earthquake load and even wind load, steel materials of components forming the power transmission tower can generate large deformation and even enter a plasticity stage, and the performance is adversely affected. The time taken to inspect these structures for damage after an earthquake, as well as the time and additional costs required for repair and replacement, can be significant.
It is therefore generally accepted that such critical structures should be isolated from seismic loads to isolate the structures for their seismic capacity. The conventional common support shock insulation measures such as a rubber pad shock insulation device, a bolt steel spring shock insulation device and the like can isolate compression, tension and shear loads. Although this arrangement is very effective for many supporting structures, it cannot be easily compensated for the high center of gravity and eccentricity of the transmission tower that can be exposed to multi-directional load inputs using only conventional standoff isolators. Therefore, it is desirable to provide a reliable seismic isolation apparatus to improve the life and reliability of the eccentric structure.
Disclosure of Invention
In order to solve the problems, the invention discloses a shock isolation device for a base of a power transmission tower and an installation method thereof, wherein the device can prolong the service life and reliability of a gravity center, eccentric and other anisotropic structure, improve the shock resistance of the structure and reduce the service life and maintenance cost.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a steel pylons base shock isolation device, includes first backup pad, second backup pad, wire rope isolator, attenuator, first backup pad level sets up, and first backup pad is parallel with the second backup pad, and first backup pad sets up in second backup pad below, and the length and the width of second backup pad are little than first backup pad, installs 2-8 wire rope isolators between first backup pad and second backup pad, installs 2-8 group's attenuators between second backup pad edge and first backup pad upper surface, and every attenuator is the slant installation with first backup pad.
As an improvement of the present invention, the first support plate is provided with a connection hole.
As an improvement of the invention, the first support plate and the second support plate are connected through bolts, and a space is arranged between the first support plate and the second support plate.
As an improvement of the invention, each wire rope vibration isolator comprises a pair of mounting modules, wherein each mounting module comprises a rectangular upper clamping plate and a parallel lower clamping plate with corresponding shapes; the upper clamping plate and the lower clamping plate are provided with connecting openings, each mounting module is provided with a plurality of side holes, 2-6 cylindrical metal wire coils penetrate into the side holes, and the metal wire coils extend along the axis parallel to the first supporting plate and the second supporting plate.
As an improvement of the invention, the steel wire rope vibration isolator and the damper are arranged at intervals.
As a refinement of the invention, the dampers are hydraulic viscous dampers or other viscous dampers, which may be arranged at a predetermined angle between the wire rope isolators.
As a modification of the present invention, each of the dampers is arranged at an angle of ± 20 ° with respect to the first support plate 68.
As a refinement of the invention, each set of dampers comprises at least three hydraulic viscous dampers mounted side by side.
As an improvement of the invention, each damper comprises a fixed end, an axial movable end and a middle part cylindrical shell, a piston rod is arranged between the axial movable end and the cylindrical shell, a damping chamber is arranged in the cylindrical shell, hydraulic liquid is reserved in the damping chamber, the fixed end is fixed on the first supporting plate, and the axial movable end is fixed on the mounting block of the second supporting plate.
A shock insulation method of a shock insulation device of a base of a power transmission tower comprises the following steps:
(1) 2-8 steel wire rope vibration isolators are arranged between the first supporting plate and the second supporting plate and mainly bear seismic waves in the horizontal direction: the axes of 2-6 cylindrical metal wire coils in the steel wire rope vibration isolator are horizontal, the steel wire rope vibration isolator has very good hysteresis curve in horizontal shock waves, can play a good role in energy consumption and support, and can automatically return after the shock (the spring is easy to deform, the energy consumption is poor, the invention changes the cylindrical metal wire coils into the steel wire rope vibration isolator)
(2) The steel wire rope vibration isolators are arranged in multiple directions, and can perform energy dissipation and vibration reduction on seismic waves in the horizontal direction in all directions;
(3) 2-8 sets of dampers are obliquely arranged between the edge of the second supporting plate and the upper plane of the first supporting plate and mainly bear the seismic wave in the vertical direction, when the vertical seismic wave comes, the base of the power transmission tower is lifted or descended, and the piston rod of each damper can move up and down to consume the seismic wave (the oblique arrangement can provide the energy consumption in the horizontal direction to a certain extent and supplement the defects of the steel wire rope vibration isolator)
(4) The steel wire rope vibration isolator and the damper are arranged at intervals, so that shock waves can be dissipated in all directions, and the service life and the reliability of the power transmission tower base are protected.
A mounting method of a shock isolation device of a base of a power transmission tower comprises the following steps:
(1) preparing a first supporting plate with an upper surface and a lower surface, wherein the first supporting plate is fixed on the top of a ground foundation and is horizontally arranged;
(2) preparing a second support plate with an upper surface and a lower surface, wherein the second support plate is parallel to the first support plate, and a space is arranged between the upper surface of the first support plate and the lower surface of the second support plate;
(3) installing a plurality of steel wire rope vibration isolators between a first supporting plate and a second supporting plate, wherein each steel wire rope vibration isolator comprises a pair of installation modules, the side surface of each installation module is provided with a side hole at intervals, a plurality of cylindrical metal wire coils penetrate into the side holes, and the metal wire coils extend along the axis parallel to the first supporting plate and the second supporting plate;
(4) install a plurality of dampers in first backup pad and second backup pad, every damper one end is installed on the upper surface of first backup pad, and the other end is installed on the upper surface of second backup pad, the attenuator is installed with first backup pad and second backup pad slant, the attenuator sets up with wire rope isolator interval.
The invention has the beneficial effects that:
(1) the damper is arranged at intervals with the steel wire rope vibration isolator, provides additional damping which cannot be provided by the steel wire rope vibration isolator, can provide additional damping for a supported ground structure with a high gravity center or eccentric structure, and can generate multi-dimensional load input, so that the structure swings, and a good vibration isolation effect is achieved;
(2) the shock isolation device is reliable and is not easy to have hysteresis effect;
(3) the number of the linear dampers can be adjusted according to the requirement to change the damping characteristic of the system, so that the linear dampers are suitable for various ground structures and load conditions, and have better applicability and stability and low maintenance cost in the whole life cycle.
Drawings
FIG. 1 is a top perspective view of the seismic isolation apparatus of the present invention;
FIG. 2 is a side elevational view of the seismic isolation system of FIG. 1;
FIG. 3(a) And FIG. 3: (b) Are a top view and a front view of a wire rope seismic isolator as used in the seismic isolation apparatus of figures 1 and 2;
FIG. 4(a) And FIG. 4: (b) Is a front view and a side view of a damper used in the seismic isolation apparatus of fig. 1 to 3.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Additionally, the drawings depict only typical features that are not necessarily drawn to scale and are not therefore to be considered to be limiting.
In fig. 1 and 2, the shock isolation device for a base of a power transmission tower according to the present embodiment includes a first support plate 104 (also referred to as a lower support plate) and a second support plate 110 (also referred to as an upper support plate). Lower support plate 104 and upper support plate 110 are each made of a suitable structural steel material and are arranged parallel to each other. The lower support plate 104 may fix the support plate 104 to the ground structure through the connection hole 105 using a bolt (not shown). As best seen in fig. 2, a gap 117 is defined between an upper surface or side 109 of the lower support plate 104 and a lower surface or side 111 of the upper support plate 110. In the present embodiment, the lower support plate 104 is rectangular in configuration with each corner 107 being beveled. The upper support plate 110 has an overall length and width smaller than the lower support plate 104. For purposes of this exemplary embodiment, the upper support plate 110 is octagonal in shape defined by sides 115. It should be noted, however, that the configurations described herein are exemplary and that other suitable polygonal shapes, including circular, may alternatively be provided for either or both of the lower support plate 104 and the upper support plate 110, so long as each support plate is planar. When assembled, the upper support plate 110 is positioned substantially over the center of the lower support plate 104, and the support plate is disposed substantially horizontally. The top 112 of the upper support plate 110 is provided with at least one set of openings 119 for bolt holes needed for mounting and securing the superstructure.
In fig. 1 and 2, a plurality of wire rope isolators 118 are positioned within the spacing 117 between the lower support plate 104 and the upper support plate 110. According to this embodiment, each wire-line isolator 118 is secured to the lower surface 111 of the upper support surface 110 and the upper surface of a support module 127, respectively, and the support module 127 is bolted or otherwise secured to the upper surface 109 of the lower support plate 104. The support module 127 is exemplary and other mounting techniques for attachment to the lower support surface 104 may be used. According to the present embodiment, a total of four wire-rope isolators 118 are disposed in equally spaced relation to each other between the lower and upper support plates 104, 110. This parameter may also vary depending on the loading conditions and the structure to be isolated.
According to (3: (a) And 3(a)b) Each wire isolator 118 includes a rectangular upper clamping plate 130 and a parallel correspondingly shaped lower clamping plate 134. A plurality of cylindrical coils 140 are introduced between the jaws 130, 134 through a series of spaced side holes 144 provided in each jaw 130, 134, the coils140 are passed therethrough and the ends are connected to the upper mounting block 130. In this embodiment, the clamping plates 130, 134 are both formed of aluminum and the cylindrical coil 140 is formed of stainless steel. But these materials may be appropriately changed. Additionally, the size of the clamping plates 130, 134 and the transverse holes 144 of the isolators 118 and the thickness of the wire in the coils 140 may also be varied as appropriate depending on the spring speed, deflection and damping characteristics required for the structure being supported and the particular application. As will be readily apparent from the discussion below, other suitable separator assemblies may alternatively be used.
The clamping plates 130,134 of the wire rope decoupler 118 further include a set of equidistant transverse pass-through attachment openings 152 on opposite top and bottom sides to allow attachment to the bottom surface 111 of the upper support plate 110 and the top surface of the support module 127.
As shown in fig. 1 and 2, the seismic isolation apparatus of the present invention further includes a plurality of linear dampers 160 disposed between the lower support plate 104 and the upper support plate 110. These dampers 160 provide additional damping that the wire rope isolators 118 cannot provide.
Each linear damper 160 in this embodiment is comprised of a cylindrical housing 168 having a fixed end 164, an axially movable end 166, and a fixed end 164, as best seen in FIG. 4(b) (see FIG. 4)a) And 4: (b). The axially movable end 166 is further connected to a piston assembly 174 including a piston rod 176 extending within the cylindrical housing 168. The interior of the cylindrical housing 168 has a damping chamber for retaining a volume of hydraulic fluid, wherein the piston assembly 174 is used to displace fluid and induce damping within the cylinder. Each of the movable and fixed ends 164, 166 of the cylindrical housing 168 includes a fitting that can be transversely mounted. The stroke of the piston assembly 174 may be selected based on the loading characteristics and the configuration of the support and isolation required. Additionally, other forms of linear dampers, such as linear friction dampers, may be substituted for the linear hydraulic dampers described herein.
In this embodiment, 4 sets of linear dampers 160 are disposed between adjacent wire rope isolators 118. Each of the four sets of linear dampers 160 includes 4 hydraulic viscous dampers arranged side by side and is independently installed. Wherein each fixed end 164 is independently secured to the lower support plate 104 and the movable end 166 is secured to an upwardly extending portion of the mounting block 190. The latter is fixedly attached to the upper surface 112 of the upper support plate 110 and secured thereto by bolts or other suitable fasteners (not shown). Each linear damper 160 is disposed at an angle of about 68 degrees with respect to the upper support plate 110. The number of sets of linear dampers 160 and the number of dampers of each set may be changed, and the installation angle of the linear dampers 160 may be changed. Due to their ease of use and independent mounting, the number of dampers 160 may vary in actual use for testing and support/damping purposes.
As previously described, the stroke length of each linear damper 160 may be appropriately selected based on the loading characteristics and the type and damping coefficient of the hydraulic fluid retained in the housing 168. To improve the tensile and compressive damping of the support structure, the wire rope isolator 118 provides a low rebound rate and some directional hysteresis damping. Because the wire rope isolators 118 do not provide sufficient damping in all directions. A plurality of linear dampers 160 are provided, mounted at an oblique angle relative to the major axis of the support structure, to provide additional damping to the system in all directions.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (10)
1. The utility model provides a steel pylons base isolation device which characterized in that: the steel wire rope vibration isolator comprises a first supporting plate, a second supporting plate, steel wire rope vibration isolators and dampers, wherein the first supporting plate is horizontally arranged and parallel to the second supporting plate, the first supporting plate is arranged below the second supporting plate, a space is arranged between the first supporting plate and the second supporting plate, the length and the width of the second supporting plate are smaller than those of the first supporting plate, 2-8 steel wire rope vibration isolators are arranged between the first supporting plate and the second supporting plate, 2-8 groups of dampers are arranged between the edge of the second supporting plate and the upper plane of the first supporting plate, and each damper is obliquely arranged with the first supporting plate.
2. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: and the first supporting plate is provided with a connecting hole.
3. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: each wire rope vibration isolator comprises a pair of installation modules, and each installation module comprises a rectangular upper clamping plate and a parallel lower clamping plate in a corresponding shape; the upper clamping plate and the lower clamping plate are provided with connecting openings, each mounting module is provided with a plurality of side holes, 2-6 cylindrical metal wire coils penetrate into the side holes, and the metal wire coils extend along the axis parallel to the first supporting plate and the second supporting plate.
4. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: the steel wire rope vibration isolator and the damper are arranged at intervals.
5. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: the damper is a hydraulic viscous damper.
6. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: each of which is arranged at an angle of ± 20 ° with respect to the first support plate 68.
7. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: each set of dampers comprises at least three hydraulic viscous dampers installed side by side.
8. The shock isolation device for the base of the transmission tower as claimed in claim 1, wherein: every attenuator includes stiff end, axial expansion end and the cylindrical casing of mid portion, be equipped with the piston rod between axial expansion end and the cylindrical casing, there is the damping chamber cylindrical shell is inside, remains hydraulic liquid in the damping chamber, the stiff end is fixed in first backup pad, and the axial expansion end is fixed on the installation piece of second backup pad.
9. A mounting method of a shock isolation device of a base of a power transmission tower is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing a first supporting plate with an upper surface and a lower surface, wherein the first supporting plate is fixed on the top of a ground foundation and is horizontally arranged;
(2) preparing a second support plate with an upper surface and a lower surface, wherein the second support plate is parallel to the first support plate, and a space is arranged between the upper surface of the first support plate and the lower surface of the second support plate;
(3) installing a plurality of steel wire rope vibration isolators between a first supporting plate and a second supporting plate, wherein each steel wire rope vibration isolator comprises a pair of installation modules, the side surface of each installation module is provided with a side hole at intervals, a plurality of cylindrical metal wire coils penetrate into the side holes, and the metal wire coils extend along the axis parallel to the first supporting plate and the second supporting plate;
(4) install a plurality of dampers in first backup pad and second backup pad, every damper one end is installed on the upper surface of first backup pad, and the other end is installed on the upper surface of second backup pad, the attenuator is installed with first backup pad and second backup pad slant, the attenuator sets up with wire rope isolator interval.
10. The method for isolating the base of the transmission tower from vibration according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
(1) 2-8 steel wire rope vibration isolators are arranged between the first supporting plate and the second supporting plate and mainly bear seismic waves in the horizontal direction: the axes of 2-6 cylindrical metal wire coils in the steel wire rope vibration isolator are horizontal, and the steel wire rope vibration isolator has a very good hysteresis curve in horizontal shock waves, can play a very good role in energy consumption and support, and can automatically return after the shock;
(2) the steel wire rope vibration isolators are arranged in multiple directions, and can perform energy dissipation and vibration reduction on seismic waves in the horizontal direction in all directions;
(3) 2-8 groups of dampers are obliquely arranged between the edge of the second supporting plate and the upper plane of the first supporting plate and mainly bear vertical seismic waves, when the vertical seismic waves come, the base of the power transmission tower is lifted or descended, and a piston rod of each damper can move up and down to consume the seismic waves;
(4) the steel wire rope vibration isolator and the damper are arranged at intervals, so that shock waves can be dissipated in all directions, and the service life and the reliability of the power transmission tower base are protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011493288.2A CN112681862A (en) | 2020-12-16 | 2020-12-16 | Shock isolation device for power transmission tower base and mounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011493288.2A CN112681862A (en) | 2020-12-16 | 2020-12-16 | Shock isolation device for power transmission tower base and mounting method thereof |
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| CN112681862A true CN112681862A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011493288.2A Pending CN112681862A (en) | 2020-12-16 | 2020-12-16 | Shock isolation device for power transmission tower base and mounting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757305A (en) * | 2021-09-07 | 2021-12-07 | 云南电网有限责任公司电力科学研究院 | Multidimensional earthquake combined shock insulation support |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101362924B1 (en) * | 2012-12-05 | 2014-02-18 | (주)엔에스브이 | Wire rope isolator |
| CN204676974U (en) * | 2015-03-10 | 2015-09-30 | 常州格林电力机械制造有限公司 | Steel tower Anti-seismic damper |
| CN108350972A (en) * | 2015-11-09 | 2018-07-31 | Itt制造企业有限责任公司 | Viscous damping device assembly with lock function |
| CN210739244U (en) * | 2019-10-30 | 2020-06-12 | 江苏力科丹普机械技术有限公司 | Combined type vibration isolation platform |
| CN210739227U (en) * | 2019-10-30 | 2020-06-12 | 江苏力科丹普机械技术有限公司 | Non-clip type integrated perforated steel rope vibration isolator |
| CN211547289U (en) * | 2019-12-11 | 2020-09-22 | 武汉东九永环工程技术有限公司 | Bridge damping device based on steel wire rope damper |
-
2020
- 2020-12-16 CN CN202011493288.2A patent/CN112681862A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101362924B1 (en) * | 2012-12-05 | 2014-02-18 | (주)엔에스브이 | Wire rope isolator |
| CN204676974U (en) * | 2015-03-10 | 2015-09-30 | 常州格林电力机械制造有限公司 | Steel tower Anti-seismic damper |
| CN108350972A (en) * | 2015-11-09 | 2018-07-31 | Itt制造企业有限责任公司 | Viscous damping device assembly with lock function |
| CN210739244U (en) * | 2019-10-30 | 2020-06-12 | 江苏力科丹普机械技术有限公司 | Combined type vibration isolation platform |
| CN210739227U (en) * | 2019-10-30 | 2020-06-12 | 江苏力科丹普机械技术有限公司 | Non-clip type integrated perforated steel rope vibration isolator |
| CN211547289U (en) * | 2019-12-11 | 2020-09-22 | 武汉东九永环工程技术有限公司 | Bridge damping device based on steel wire rope damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757305A (en) * | 2021-09-07 | 2021-12-07 | 云南电网有限责任公司电力科学研究院 | Multidimensional earthquake combined shock insulation support |
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Application publication date: 20210420 |