阅读说明：本技术 带体外环形液体阻尼器的独立式避雷针 (Independent lightning rod with external ring-shaped liquid damper ) 是由 华坤 彭益成 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种带体外环形液体阻尼器的独立式避雷针,包括圆管针体结构、至少一个体外环形液体阻尼器和若干个连接板,所述圆管针体结构的外部设置所述体外环形液体阻尼器；本发明能够显著改善独立式避雷针在风力作用下的动力响应,减小针体结构在各级风速下的共振,且构造简单、不增加过多的制造费用；随着独立式避雷针使用年限的增加,当其自身的振动频率改变时,可打开环形盖板调整调频液体的量,使用阶段的维护方便易操作。(The invention discloses an independent lightning rod with an external annular liquid damper, which comprises a circular tube needle body structure, at least one external annular liquid damper and a plurality of connecting plates, wherein the external annular liquid damper is arranged outside the circular tube needle body structure; the invention can obviously improve the dynamic response of the independent lightning rod under the action of wind power, reduce the resonance of the needle body structure under all levels of wind speeds, has simple structure and does not increase excessive manufacturing cost; with the increase of the service life of the independent lightning rod, when the vibration frequency of the independent lightning rod is changed, the annular cover plate can be opened to adjust the amount of the frequency-modulated liquid, and the maintenance in the use stage is convenient and easy to operate.)

1. The utility model provides an outer annular liquid damper's of area stand alone type lightning rod which characterized in that: the device comprises a round tube needle body structure (1), at least one external annular liquid damper (2) and a plurality of connecting plates (3), wherein the external annular liquid damper (2) is arranged outside the round tube needle body structure (1); the in-vitro liquid damper (2) comprises an annular bottom plate (21), an outer side wall (22), an inner side wall (23), frequency-modulated liquid (24) and an annular upper cover plate (25); the annular bottom plate (21) is connected on the connecting plate (3), the annular bottom plate (21) is connected the lateral wall (22) with inside wall (23), frequency modulation liquid (24) are arranged in the lateral wall (22) with between inside wall (23), annular upper cover plate (25) sets up lateral wall (22) with the top of inside wall (23).

2. A freestanding lightning rod with an outer annular liquid damper as claimed in claim 1, wherein: the external liquid damper (2) is connected with the main body of the round tube needle body structure (1) through the connecting plate (3).

3. A free standing lightning rod with an external fluid damper according to claim 2, characterized in that: the frequency-modulated liquid (24) is water or a glycerol solution.

Technical Field

The invention relates to the technical field of power transformation structures in the power industry, in particular to an independent lightning rod with an external annular liquid damper.

Background

In substation engineering, lightning current is generally conducted to the ground by installing a lightning rod in order to prevent electrical equipment and devices from being directly struck by lightning. The independent lightning rod is widely applied to transformer substations of various voltage grades, and the structural main body is generally formed by connecting a plurality of sections of round steel tubes through flange plates, has a total height of more than 20m, and belongs to a slender high-rise structure. The independent lightning rod has a large slenderness ratio and small integral rigidity, so that downwind wind-induced vibration is easy to occur under the action of pulsating wind; meanwhile, since the cross section is circular, cross-wind vortex-induced vibration is likely to occur even at low wind speeds. Under the action of the downwind and the transverse wind, on one hand, the deformation of the independent lightning rod is often large, and the top displacement is easy to exceed the limit; on the other hand, the lightning rod is subjected to reciprocating alternating load, high-cycle fatigue failure easily occurs to welding seams and bolts at the connecting flange under a low stress state, and once micro cracks develop, the whole lightning rod can be suddenly broken, and unnecessary casualties and economic loss are caused.

For a high-rise independent lightning rod, vibration damping control under the action of wind power is always a key problem in engineering design. In current engineering practice, the vibration of the needle body is generally reduced by an enlarged section method or arranging a guy cable. However, the method of increasing the cross section has a low efficiency in controlling the wind-induced vibration, and the standard control standard is often reached by increasing the steel consumption; the arrangement of the stay cable requires a large open place, and the arrangement of the stay cable also does not have the land use condition in part of transformer substation projects.

Calculation shows that the dynamic response of the independent lightning rod under the action of wind power can be obviously improved by arranging the liquid damper on the independent lightning rod, and the resonance of the needle body structure under all levels of wind speeds is reduced. The self-contained circular tube structure of the independent lightning rod is utilized, the liquid damper is formed outside the lightning rod through the structure, the vibration reduction purpose is achieved, the integration of the needle body structure and the damper element is also realized, the independent lightning rod with the external annular liquid damper is formed, the mode is simple and efficient, and the independent lightning rod has practical engineering significance and a larger application prospect in the power industry.

The person skilled in the art is dedicated to solving the above technical drawbacks.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical purpose of the present invention is to solve the problem that the independent lightning rod structure vibrates under the action of wind force and resonates at all levels of wind speed.

In order to achieve the technical purpose, the invention provides an independent lightning rod with an external annular liquid damper, which comprises a circular tube needle body structure, at least one external annular liquid damper and a plurality of connecting plates, wherein the external annular liquid damper is arranged outside the circular tube needle body structure; the external liquid damper comprises an annular bottom plate, an outer side wall, an inner side wall, frequency-modulated liquid and an annular upper cover plate; the annular bottom plate is connected on the connecting plate, the annular bottom plate is connected with the outer side wall and the inner side wall, the frequency modulation liquid is arranged between the outer side wall and the inner side wall, and the annular upper cover plate is arranged above the outer side wall and the inner side wall.

Preferably, the external liquid damper is connected with the round tube needle body structure main body through a connecting plate.

Preferably, the frequency-modulated liquid is water or a glycerol solution.

The invention has the beneficial effects that:

due to the structural design, the dynamic response of the independent lightning rod under the action of wind power can be obviously improved, the resonance of the needle body structure under all levels of wind speeds is reduced, the structure is simple, and excessive manufacturing cost is not increased; with the increase of the service life of the independent lightning rod, when the vibration frequency of the independent lightning rod is changed, the annular cover plate can be opened to adjust the amount of the frequency-modulated liquid, and the maintenance in the use stage is convenient and easy to operate.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic structural diagram of an external annular liquid damper according to the present invention.

In the figure: the device comprises a round tube needle body structure 1, an external annular liquid damper 2, an annular bottom plate 21, an external side wall 22, an internal side wall 23, frequency-modulated liquid 24, an annular upper cover plate 25 and a connecting plate 3.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.