CN209896438U - Aluminum pipe root sleeve damper rod type lightning rod for upper section - Google Patents
Aluminum pipe root sleeve damper rod type lightning rod for upper section Download PDFInfo
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- CN209896438U CN209896438U CN201920218493.4U CN201920218493U CN209896438U CN 209896438 U CN209896438 U CN 209896438U CN 201920218493 U CN201920218493 U CN 201920218493U CN 209896438 U CN209896438 U CN 209896438U
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Abstract
A rod-type lightning rod with an aluminum pipe root sleeve damper for an upper section relates to the power transmission and distribution technology and discloses a lightning rod with an aluminum pipe for an upper section, a steel pipe for a lower section and a root sleeve damper. The lightning rod is formed by connecting a lightning rod (1), an aluminum pipe section (2), a steel pipe section (3) and a damper (4) from top to bottom. The damper (4) is composed of a damping cylinder (5) made of elastic materials and a steel pipe outer sleeve (6). The damping cylinder (5) is tightly embedded between the grounding root of the steel pipe section (3) and the steel pipe outer sleeve (6). The steel pipe section (3) and the steel pipe outer sleeve (6) are both rigidly fixed with the foundation. When the wind blows the lightning rod to vibrate, the elastic damping cylinder (5) is extruded back and forth, and the damping cylinder (5) deforms to absorb vibration energy, so that the amplitude is restrained, the failure is accelerated, and the fatigue damage is resisted. The upper section is made of aluminum tubes, the density is low, the gravity center of the rod is reduced, the inertia force arm of the rod is reduced, the bending moment of the rod root caused by the inertia force is effectively reduced, and bending resistance is facilitated. The method is used for the rod-type lightning rod.
Description
Technical Field
A rod-type lightning rod with an aluminum pipe root sleeve damper at the upper section relates to the power transmission and distribution technology, in particular to a rod-type lightning rod with a damper at the root of a steel pipe at the lower section of an aluminum pipe at the upper section.
Background
The four corners of the substation equipment field are provided with single steel pipe lightning rods with the height of 25m and 30m, and the bending rigidity is very low. Wind-induced vibration is easily generated under the action of pulsating wind. The vibration is an alternating load, and the root component of the lightning rod is easy to generate fatigue failure. The mechanical property of the wind load of the single steel tube lightning rod is 'cantilever beam uniformly loaded', the bending moment M borne by the fixed end is the maximum, and the value M ismaxIs to uniformly distribute wind load Q and half of the square of the lightning rod height L, namely Mmax＝QL2/2. In fact, when wind blows the rod end of the lightning rod to vibrate, the lightning rod is also subjected to bending moment generated by concentrated load of the gravity center inertia force of the rod. The maximum bending moment m of the cantilever beam on the fixed end under the concentrated load ismaxIs the product of the concentration force p and the force-acting arm, i.e. mmaxPl. Specifically, the lightning rod is the product of the inertia force and the force arm at the fixed end. To solve the problem of fatigue failure at the root of the lightning rod, the method should be used to reduce the bending moment at the root and the amplitude and frequency of wind vibration.
Disclosure of Invention
The problem that the upper segment needs to be solved with aluminum pipe root cover attenuator rod-type lightning rod is: improve the wind-vibration resistance of the root of the lightning rod.
The technical scheme is as follows: the upper section of the lightning rod adopts a lead pipe, the lower section of the lightning rod adopts a steel pipe to reduce the gravity center, and the root of the lightning rod is additionally provided with a damper.
The upper section is formed by connecting a lightning rod 1, an aluminum pipe section 2, a steel pipe section 3 and a damper 4 from top to bottom by using an aluminum pipe root sleeve damper rod type lightning rod (attached drawing). The damper 4 is composed of a damping cylinder 5 made of elastic materials and a steel pipe outer sleeve 6. The damping cylinder 5 is tightly embedded between the grounding root part of the steel pipe section 3 and the steel pipe outer sleeve 6.
When the lightning rod is blown by wind load to vibrate, the steel pipe jacket 6 has enough rigidity, so that the lightning rod extrudes the elastic damping cylinder 5 back and forth, the elastic deformation of the damping cylinder 5 absorbs the vibration energy of the lightning rod, the amplitude is restrained, the failure is accelerated, and the fatigue damage is resisted.
The upper section of the lightning rod adopts the aluminum pipe, and the density of the aluminum pipe is only 0.34 of that of steel, so the gravity center of the lightning rod is obviously reduced, the inertia force arm of the lightning rod is also obviously reduced, and the bending moment of the inertia force on the root of the lightning rod is effectively reduced.
The aluminum pipe root sleeve damper rod type lightning rod for the upper section has the beneficial effects that: the structure is reasonable; the wind resistance is strong; and (3) fatigue resistance.
Drawings
The attached drawing is a structural schematic diagram of a rod-type lightning rod of an aluminum pipe root sleeve damper for the upper section.
In the figure: 1-lightning rod; 2-aluminum pipe section; 3-steel pipe section; 4-a damper; 5-damping cylinder; 6-coat; 7-rain cover.
Detailed Description
The height of the aluminum pipe section 2 accounts for 1/3-1/4 of the height of the whole rod, and all sections in the section are connected through flanges.
The outer sleeve 6 is made of a steel pipe 2-3 times of the outer diameter of the root steel pipe, and the height is 2.5-3 m. The lower end is provided with a flange plate for connecting with a foundation, and the whole hot galvanizing is anticorrosive. The upper end is provided with a split adhesive rain cover 7 which is formed by plastic injection molding, the center is provided with a hole penetrating through the lightning rod, and the outer edge covers the outer sleeve 6.
The damping cylinder 5 is made of polyurethane and is molded into a split ring with the thickness of 100mm, the inner diameter tightly embraces the pipe rod and the outer diameter tightly props the outer sleeve 6. The two halves are spliced layer by layer and embedded into the outer sleeve 6.
The lightning rod 1 and the steel pipe section 3 adopt the existing products.
Claims (5)
1. Aluminum pipe root cover attenuator rod-type lightning rod for upper segment, including lightning rod (1), steel pipe section (3), characterized by: the lightning rod is formed by connecting a lightning rod (1), an aluminum pipe section (2), a steel pipe section (3) and a damper (4) from top to bottom; the damper (4) consists of a damping cylinder (5) made of elastic materials and a steel pipe outer sleeve (6); the damping cylinder (5) is tightly embedded between the grounding root of the steel pipe section (3) and the steel pipe outer sleeve (6).
2. The aluminum pipe root sleeve damper rod type lightning rod for the upper segment as set forth in claim 1, wherein: the total height of the aluminum pipe sections (2) accounts for 1/3-1/4 of the height of the whole rod, and all sections in the sections are connected through flanges.
3. The aluminum pipe root sleeve damper rod type lightning rod for the upper segment as set forth in claim 1, wherein: the outer sleeve (6) is made of a steel pipe with the diameter 2-3 times that of the root steel pipe, the height is 2.5-3 m, a flange plate is arranged at the lower end of the outer sleeve, and hot galvanizing is carried out on the whole.
4. The aluminum pipe root sleeve damper rod type lightning rod for the upper segment as set forth in claim 1, wherein: the rain cover (7) is formed by plastic injection molding, is bonded in a split mode, is provided with a hole in the center, and covers the outer sleeve (6) at the outer edge.
5. The aluminum pipe root sleeve damper rod type lightning rod for the upper segment as set forth in claim 1, wherein: the damping cylinder (5) is made of polyurethane and is molded into a split ring with the thickness of 100mm, the inner diameter tightly embracing the pipe rod and the outer diameter tightly propping sleeve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920218493.4U CN209896438U (en) | 2019-02-13 | 2019-02-13 | Aluminum pipe root sleeve damper rod type lightning rod for upper section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920218493.4U CN209896438U (en) | 2019-02-13 | 2019-02-13 | Aluminum pipe root sleeve damper rod type lightning rod for upper section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209896438U true CN209896438U (en) | 2020-01-03 |
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ID=68996607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920218493.4U Active CN209896438U (en) | 2019-02-13 | 2019-02-13 | Aluminum pipe root sleeve damper rod type lightning rod for upper section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209896438U (en) |
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2019
- 2019-02-13 CN CN201920218493.4U patent/CN209896438U/en active Active
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