CN111927186B - Transmission tower with lead rubber twisted and lifted - Google Patents
Transmission tower with lead rubber twisted and lifted Download PDFInfo
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- CN111927186B CN111927186B CN202010910064.0A CN202010910064A CN111927186B CN 111927186 B CN111927186 B CN 111927186B CN 202010910064 A CN202010910064 A CN 202010910064A CN 111927186 B CN111927186 B CN 111927186B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/18—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic
- E04H12/182—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic telescopic
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2292—Holders used for protection, repair or reinforcement of the post or pole
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a power transmission tower with lead core rubber twisted and lifted, which belongs to the technical field of power transmission towers and comprises a main tower, a low hanging point single-rotation arm, a laminated lead core rubber steel plate twisting support and a high hanging point support, wherein a main tower double-rotation shaft is fixedly connected between the main tower and the high hanging point support, the laminated lead core rubber steel plate twisting support and a hinge connecting device are sequentially and rotatably connected onto the main tower double-rotation shaft from top to bottom, and the hinge connecting device is fixedly connected with the low hanging point single-rotation arm through a bolt. Under normal use state, the structure is stable and durable, under the accident condition, the multilayer thin-walled plates of the limiter are sequentially broken, the twisted member is allowed to rotate in stages, the vibration energy is consumed, the twisting speed is reduced, the twisted member is allowed to be twisted and unloaded at the same time, the twisted member can be automatically restored to the initial state after being unloaded, the purpose of slowly and effectively unloading horizontal force and twisting force is achieved, the twisting effect is reduced, the safety of the power transmission tower is improved, and the installation and the maintenance are convenient.
Description
Technical Field
The invention relates to the technical field of power transmission towers, in particular to a power transmission tower with a lead core rubber which is twisted and ascended.
Background
The power transmission tower is a common high-rise structure and is acted by gravity load, wind load, earthquake load and the like at ordinary times, meanwhile, various load actions borne by a power transmission line on the power transmission tower are finally transmitted to the power transmission tower, and under normal conditions, the force generated by the power transmission line on the power transmission tower is close to balance, so that the power transmission tower is only acted by vertical force and a small part of unbalanced force, but under the condition of an accident, the power transmission line on the power transmission tower is subjected to asymmetric fracture, the cable is often an instant thing when being fractured, the load characteristic of the cable has obvious impact load characteristic, and the damage to the structure is increased; in addition, most power transmission towers at the present stage need a larger insulation space under the insulation requirement of a power transmission mechanism, so that a first distance is usually arranged between the stress action point of a power transmission line of the power transmission tower and the centroid of a main tower of the power transmission tower, the distance between two end points of the power transmission line is reduced after a twisted component rotates, the power transmission line is loosened and falls under the action of gravity, and the potential safety hazard exists.
Disclosure of Invention
The invention aims to provide a power transmission tower with a lead core rubber twisted and rising, which has a stable and durable structure in a normal use state, wherein under an accident working condition, a plurality of layers of thin-wall plates of a limiter are sequentially broken, the twisted component is allowed to rotate in a staged manner, the vibration energy is consumed, the twisting speed is reduced, the twisted component is allowed to be twisted and unloaded simultaneously, and the power transmission tower can be automatically recovered to an initial state after being unloaded, so that the aim of slowly and effectively unloading horizontal force and twisting force is fulfilled, the twisting effect is reduced, the safety of the power transmission tower is improved, the power transmission tower is convenient to install and maintain, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a power transmission tower with lead core rubber twisted and ascended comprises a main tower, a low hanging point single-rotation arm, a laminated lead core rubber steel plate twisting support and a high hanging point support, wherein a main tower double-rotating shaft is fixedly connected between the main tower and the high hanging point support, the main tower double-rotating shaft is sequentially and rotatably connected with the laminated lead core rubber steel plate twisting support and a hinge connecting device from top to bottom, and the hinge connecting device is fixedly connected with the low hanging point single-rotation arm through a bolt;
the laminated lead core rubber steel plate torsion support comprises an inner steel plate layer, a laminated rubber component, a laminated lead core component, an outer steel plate layer and an outward extending groove, wherein the inner steel plate layer, the laminated rubber component and the laminated lead core component are mutually overlapped from inside to outside to form a structural unit, the structural unit is repeatedly overlapped to form an inner structural layer of the laminated lead core rubber steel plate torsion support, the outer steel plate layer is overlapped outside the inner structural layer, and the inner steel plate layer on the inner side of the laminated lead core rubber steel plate torsion support is mutually connected with a main tower;
a limiter is connected between the two laminated lead core rubber steel plate torsion supports and comprises a longitudinal thin-wall plate and a transverse thin-wall plate, the longitudinal thin-wall plate is provided with a vertical transverse thin-wall plate, at least one group of transverse thin-wall plates is arranged, each group comprises two transverse thin-wall plates, and the two transverse thin-wall plates in the same group are mutually symmetrical about the axis of the main tower;
the low hanging point single-rotation support is characterized in that an iron pin, a fixed steel rod and an ear plate are arranged on the low hanging point single-rotation rotating arm, one end of the low hanging point single-rotation rotating arm is connected with a hinge connecting device through the iron pin in a rotating mode, the fixed steel rod on the low hanging point single-rotation rotating arm penetrates through an overhanging groove and is movably connected with the overhanging groove, the ear plates are welded on the upper surface of the low hanging point single-rotation rotating arm and the side wall of the high hanging point support, and a pull rope is connected between the two ear plates.
Furthermore, the hinge connecting device is connected with the main tower double rotating shaft in a matching way through a bearing or a bearing bush.
Furthermore, the main tower is arranged on the ground, a high hanging point support is arranged on the main tower, a high hanging point insulator is arranged on the high hanging point support and is connected with the high-voltage transmission line, and the high hanging point support is a solid web type or lattice type component.
Furthermore, two low hanging point insulators are symmetrically mounted on the two low hanging point single rotating arms respectively and connected with the high-voltage power transmission line, wherein the low hanging point single rotating arms are solid web type or lattice type components.
Furthermore, the ports of the transverse thin-walled plates are abutted against the outer walls of the two laminated lead core rubber steel plate torsion supports.
Compared with the prior art, the invention has the beneficial effects that: according to the power transmission tower with the twisted lead core and the rubber, under a normal use state, the limiter has a certain bearing capacity, the rotation of a twisted component is limited, the structure is stable and durable, under an accident working condition, the multilayer thin-wall plates of the limiter are sequentially broken, the twisted component is allowed to rotate in a staged mode, the elastic performance of the rubber is adopted to form a torsional elastic element, the energy consumption capacity of the lead core is adopted to consume vibration energy and reduce the twisting speed, the twisted component is allowed to be twisted and unloaded at the same time, and the power transmission tower can be automatically recovered to an initial state after being unloaded; the purpose of slowly and effectively unloading the horizontal force and the torsional force is achieved, the torsional effect is reduced, the safety of the power transmission tower is improved, and the installation and the maintenance are convenient.
Drawings
Fig. 1 is an overall structural view of a power transmission tower in which lead rubber of the present invention is twisted to rise;
fig. 2 is an assembly view of a transmission tower with a twisted rise of lead rubber according to the present invention;
fig. 3 is an exploded view of a lead rubber twist-up transmission tower of the present invention;
FIG. 4 is a view of the construction of a low hanging point single swivel arm of a transmission tower of the present invention with lead rubber twisted up;
FIG. 5 is a structural view of a laminated lead rubber steel plate torsion support of a power transmission tower in which a lead rubber is torsionally lifted according to the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 6 in accordance with the present invention;
fig. 7 is a structural view of a layered rubber member of a power transmission tower in which lead rubber is twisted to rise according to the present invention;
fig. 8 is a view showing a layered lead member structure of a power transmission tower in which a lead rubber is twisted to rise according to the present invention;
fig. 9 is a diagram showing a stopper structure of a transmission tower in which lead rubber is twisted to rise in accordance with a first embodiment of the present invention;
fig. 10 is a diagram showing a stopper structure of a power transmission tower in which lead rubber is twisted and raised according to a second embodiment of the present invention.
In the figure: 1. a main tower; 101. a main tower double rotating shaft; 2. a low hanging point single rotating arm; 201. an iron pin; 202. Fixing the steel rod; 203. an ear plate; 301. an inner steel sheet layer; 302. a layered rubber component; 303. a layered lead core component; 304. an outer steel sheet layer; 305. an outward extending groove; 3. a laminated lead core rubber steel plate torsion support; 4. a high hanging point bracket; 5. a high hang point insulator; 6. a low hang point insulator; 7. a hinge connection device; 8. a cable; 9. a stopper; 91. a longitudinal thin-walled plate; 92. a transverse thin-walled plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 to 4, the power transmission tower with the lead core rubber twisted and lifted comprises a main tower 1, a low hanging point single-rotation arm 2, a laminated lead core rubber steel plate twisting support 3 and a high hanging point support 4, wherein a main tower double-rotation shaft 101 is fixedly connected between the main tower 1 and the high hanging point support 4, the laminated lead core rubber steel plate twisting support 3 and a hinge connecting device 7 are sequentially and rotatably connected to the main tower double-rotation shaft 101 from top to bottom, and the hinge connecting device 7 is fixedly connected with the low hanging point single-rotation arm 2 through a bolt;
the main tower 1 is arranged on the ground, a high hanging point support 4 is arranged on the main tower 1, a high hanging point insulator 5 is arranged on the high hanging point support 4, the high hanging point insulator 5 is connected with a high-voltage transmission line, the high hanging point support 4 is a solid web type or lattice type component, and the structure of the main tower 1 can adopt various forms including a solid web type and a lattice type component;
two low hanging point insulators 6 are symmetrically arranged on the two low hanging point single rotating arms 2 respectively, and the two low hanging point insulators 6 are connected with a high-voltage power transmission line, wherein the low hanging point single rotating arms 2 are solid web type or lattice type components;
the hinge connecting device 7 is connected with the main tower double-rotating shaft 101 in a matching way through a bearing or a bearing bush; wherein, the bearing connection causes rolling friction between the hinge connecting device 7 and the main tower double rotating shaft 101, and the bearing connection causes sliding friction between the hinge connecting device 7 and the main tower double rotating shaft 101;
an iron pin 201, a fixed steel rod 202 and ear plates 203 are arranged on the low hanging point single rotation arm 2, one end of the low hanging point single rotation arm 2 is rotatably connected with a hinge connecting device 7 through the iron pin 201, the fixed steel rod 202 on the low hanging point single rotation arm 2 penetrates through the overhanging groove 305 and is movably connected with the overhanging groove 305, the ear plates 203 are welded on the upper surface of the low hanging point single rotation arm 2 and the side wall of the high hanging point support 4, and a inhaul cable 8 is connected between the two ear plates 203;
under the condition of an accident, particularly under the action of huge torsional force generated by horizontal load caused by inconsistent broken lines in two low hanging point broken line areas, the low hanging point single rotating arm 2 moves relatively, a fixed steel rod 202 on the low hanging point single rotating arm 2 rotates to drive an overhanging groove 305 of the laminated rubber steel plate torsion support to move, the force of rotation of the low hanging point single rotating arm 2 is converted into the force of driving the laminated lead core rubber steel plate torsion support 3 to twist, the laminated lead core rubber steel plate torsion support 3 is driven to twist, and therefore the low hanging point single rotating arm 2 is allowed to rotate; after the rotation, although the horizontal force is basically unchanged, the force arm of the horizontal force is greatly reduced and even is zero; therefore, the rotation can greatly reduce the bending moment of the low hanging point single-rotation arm 2, thereby protecting the safety of the low hanging point single-rotation arm 2 and reducing the manufacturing cost of the low hanging point single-rotation arm 2; in addition, because the bending moment of the single rotating arm 2 with a low hanging point is reduced, the torque transmitted to the main tower 1 is also reduced, so that the safety of the main tower 1 is also improved, and the corresponding manufacturing cost can be reduced; the low hanging point single rotation arm 2 is connected with the high hanging point support 4 through the inhaul cable 8, when the low hanging point single rotation arm 2 rotates, the distance between the ear plate 203 at the joint of the high hanging point support 4 and the inhaul cable 8 is increased, the inhaul cable 8 generates larger pulling force, so that the low hanging point single rotation arm 2 is pulled upwards by the inhaul cable 8 in the rotating process, the low hanging point single rotation arm 2 generates transverse displacement and vertical displacement, and the problem of too low lead caused by rotation of a rotating shaft under the condition of wire breakage is effectively solved by increasing the height of the hanging point;
when the vehicle enters a maintenance state after an accident occurs or is safely unloaded in the installation process, the low hanging point single rotating arm 2 can automatically return to the initial position under the action of the laminated lead rubber steel plate torsion support 3, so that the maintenance and the installation can be very convenient.
Referring to fig. 5 to 8, the laminated lead core rubber steel plate torsion support 3 includes an inner steel plate layer 301, a laminated rubber component 302, a laminated lead core component 303, an outer steel plate layer 304 and an outward extending groove 305, the inner steel plate layer 301 and the outer steel plate layer 304 are both cylindrical, the inner steel plate layer 301, the laminated rubber component 302 and the laminated lead core component 303 are mutually overlapped from inside to outside to form a structural unit, the structural unit is repeatedly overlapped to form an inner structural layer of the laminated lead core rubber steel plate torsion support 3, the outer steel plate layer 304 is overlapped outside the inner structural layer, and the steel plate can restrict deformation of the rubber and the lead core, so that the rubber has strong deformation capability and can realize large-angle torsion, and the deformation of the lead core can generate strong energy consumption capability; the outer steel plate layer 304 is slightly higher than the inner steel plate layer 301, so that the inner steel plate layer 301 can be prevented from rubbing with other members; the inner steel plate layer 301 on the inner side of the laminated lead core rubber steel plate torsion support 3 is connected with the main tower 1; one end of the laminated lead core rubber steel plate torsion support 3 is connected with the main tower 1, the other end of the laminated lead core rubber steel plate torsion support is connected with the low hanging point single-rotation arm 2, when the low hanging point single-rotation arm 2 is twisted relative to the main tower 1, the fixed steel rod 202 on the low hanging point single-rotation arm 2 rotates, the outward extending groove 305 moves, the laminated lead core rubber steel plate torsion support 3 is driven to be twisted, the restoring force of rubber can limit the twisting angle, the lead core can dissipate kinetic energy and reduce vibration, the aims of limiting excessive deformation and too fast deformation of the low hanging point single-rotation arm 2 and reducing vibration are achieved, the low hanging point single-rotation arm 2 can automatically recover under the elastic force of the rubber during maintenance, the rubber has a certain damping ratio, and the vibration of the structure of the power transmission tower under the accident condition can be reduced to a certain degree.
Referring to fig. 9, a limiter 9 is connected between the two laminated lead core rubber steel plate torsion supports 3, the limiter 9 comprises a longitudinal thin-wall plate 91 and a transverse thin-wall plate 92, the longitudinal thin-wall plate 91 is provided with a vertical transverse thin-wall plate 92, at least one group of transverse thin-wall plates 92 is provided, each group comprises two transverse thin-wall plates, and the two transverse thin-wall plates 92 in the same group are mutually symmetrical about the axis of the main tower 1; the ports of the transverse thin-wall plates 92 are abutted against the outer walls of the two laminated lead core rubber steel plate torsion supports 3, in a normal use state, a limiter 9 is arranged between the main tower 1 and the low hanging point single rotation arm 2, two ends of each transverse thin-wall plate 92 are abutted against the outer wall of the laminated lead core rubber steel plate torsion support 3, the outer wall of the laminated lead core rubber steel plate torsion support 3 is fixed, the rotation of the laminated lead core rubber steel plate torsion support is limited, the transverse thin-wall plate 92 of the limiter 9 can rotate only when the force exceeds a certain degree, and the deformation of the low hanging point single rotation arm 2 is limited, namely, certain initial torque exists, and the normal installation and use can be realized.
Example two
Referring to fig. 10, a limiter 9 is connected between the two laminated lead core rubber steel plate torsion supports 3, the limiter 9 comprises a longitudinal thin-wall plate 91 and a transverse thin-wall plate 92, the longitudinal thin-wall plate 91 is provided with a vertical transverse thin-wall plate 92, at least one group of transverse thin-wall plates 92 is provided, each group comprises two transverse thin-wall plates, and the two transverse thin-wall plates 92 in the same group are mutually symmetrical about the axis of the main tower 1; the transverse thin-wall plate 92 in the middle of the longitudinal thin-wall plate 91 is abutted against the outer wall of the laminated lead core rubber steel plate torsion support 3, and the port of the residual transverse thin-wall plate 92 is not abutted against the laminated lead core rubber steel plate torsion support 3; under the normal use state, a limiter 9 is arranged between the main tower 1 and the low hanging point single-rotation arm 2, two ends of a transverse thin-wall plate 92 are abutted against the outer wall of the laminated lead core rubber steel plate torsion support 3, the outer wall of the laminated lead core rubber steel plate torsion support 3 is fixed to limit the rotation of the laminated lead core rubber steel plate torsion support 3, when the force exceeds a certain degree, the transverse thin-wall plate 92 on the inner layer of the limiter 9 is damaged, the laminated lead core rubber steel plate torsion support 3 rotates in a small range, the transverse thin-wall plate 92 on the outer layer of the limiter 9 is sequentially damaged, the rotation angle of the laminated lead core rubber steel plate torsion support 3 can be gradually enlarged, certain initial torque is achieved, and the deformation of the low hanging point single.
To sum up: according to the power transmission tower with the lead core rubber twisted and rising, under a normal use state, the limiting device 9 has a certain bearing capacity, the rotation of a twisted component is limited, the structure is stable and durable, under an accident working condition, the multiple layers of thin-wall plates of the limiting device 9 are sequentially broken, the twisted component is allowed to rotate in a staged mode, the elastic performance of the rubber is adopted to form a twisting elastic element, the energy consumption capacity of the lead core is adopted to consume vibration energy and reduce the twisting speed, the twisted component is allowed to be twisted and unloaded at the same time, and the twisted component can be automatically recovered to an initial state after being unloaded; the purpose of slowly and effectively unloading the horizontal force and the torsional force is achieved, the torsional effect is reduced, the safety of the power transmission tower is improved, and the installation and the maintenance are convenient.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention within the technical scope of the present invention, and the technical solution of the present invention should be equivalent to or changed in the technical idea of the present invention.
Claims (5)
1. The power transmission tower with the twisted lead rubber is characterized by comprising a main tower (1), a low hanging point single-rotation arm (2), a laminated lead rubber steel plate twisting support (3) and a high hanging point support (4), wherein a main tower double-rotation shaft (101) is fixedly connected between the main tower (1) and the high hanging point support (4), the laminated lead rubber steel plate twisting support (3) and a hinge connecting device (7) are sequentially and rotatably connected onto the main tower double-rotation shaft (101) from top to bottom, and the hinge connecting device (7) is fixedly connected with the low hanging point single-rotation arm (2) through bolts;
the laminated lead core rubber steel plate torsion support (3) comprises an inner steel plate layer (301), a laminated rubber component (302), a laminated lead core component (303), an outer steel plate layer (304) and an outward extending groove (305), the inner steel plate layer (301), the laminated rubber component (302) and the laminated lead core component (303) are mutually overlapped from inside to outside to form a structural unit, the structural unit is repeatedly overlapped to form an inner structural layer of the laminated lead core rubber steel plate torsion support (3), the outer steel plate layer (304) is overlapped outside the inner structural layer, and the inner steel plate layer (301) on the inner side of the laminated lead core rubber steel plate torsion support (3) is mutually connected with a main tower (1);
a limiter (9) is connected between the two laminated lead core rubber steel plate torsion supports (3), the limiter (9) comprises a longitudinal thin-wall plate (91) and a transverse thin-wall plate (92), the longitudinal thin-wall plate (91) is provided with a vertical transverse thin-wall plate (92), at least one group of transverse thin-wall plates (92) is provided, each group comprises two transverse thin-wall plates, and the two transverse thin-wall plates (92) in the same group are mutually symmetrical about the axis of the main tower (1);
be equipped with iron pin (201), fixed steel pole (202) and otic placode (203) on low hanging point single rotating arm (2), the one end of low hanging point single rotating arm (2) has hinged joint device (7) through iron pin (201) swivelling joint, fixed steel pole (202) on low hanging point single rotating arm (2) pass overhanging recess (305) to with overhanging recess (305) swing joint, all weld on the upper surface of low hanging point single rotating arm (2) and the lateral wall of high hanging point support (4) otic placode (203), be connected with cable (8) between two otic placodes (203).
2. The lead rubber twist-up power transmission tower according to claim 1, wherein the hinge connection means (7) is coupled to the main tower double shaft (101) by means of a bearing or a bearing bush.
3. The lead rubber torsion ascending power transmission tower according to claim 1, wherein the main tower (1) is installed on the ground, the main tower (1) is provided with a high hanging point support (4), the high hanging point support (4) is provided with a high hanging point insulator (5), the high hanging point insulator (5) is connected with the high voltage power transmission line, and the high hanging point support (4) is a solid web type or lattice type member.
4. The transmission tower with lead core and twisted rise of rubber according to claim 1, wherein two low hanging point insulators (6) are symmetrically mounted on two low hanging point single rotating arms (2), respectively, and the two low hanging point insulators (6) are connected to the high voltage transmission line, wherein the low hanging point single rotating arms (2) are solid web or lattice members.
5. The transmission tower with twisted lead rubber rise according to claim 1, characterized in that the ports of the transverse thin-walled plate (92) are abutted against the outer walls of the two laminated twisted lead rubber steel plates (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010910064.0A CN111927186B (en) | 2020-09-02 | 2020-09-02 | Transmission tower with lead rubber twisted and lifted |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010910064.0A CN111927186B (en) | 2020-09-02 | 2020-09-02 | Transmission tower with lead rubber twisted and lifted |
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| Publication Number | Publication Date |
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| CN111927186A CN111927186A (en) | 2020-11-13 |
| CN111927186B true CN111927186B (en) | 2021-07-09 |
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| US20050102928A1 (en) * | 2003-11-14 | 2005-05-19 | Oidtman Robert E. | Bracket and pole assembly |
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| JP2003018731A (en) * | 2001-06-28 | 2003-01-17 | Souki Kk | Telescopic power pole and cable installation method |
| US7057103B1 (en) * | 2004-05-07 | 2006-06-06 | Alan B Peabody | Transmission tower devices for reducing longitudinal shock loads |
| CN203296450U (en) * | 2013-06-14 | 2013-11-20 | 祁锦明 | Concrete pole with cross arm connecting points |
| WO2015063065A1 (en) * | 2013-10-29 | 2015-05-07 | Alstom Technology Ltd | Support structure comprising a shock absorbing pillar |
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|---|---|
| CN111927186A (en) | 2020-11-13 |
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