阅读说明：本技术 一种带內环板的新型避雷针 (Novel lightning rod with inner ring plate ) 是由 方瑜 胡宇鹏 吴祖咸 俞辰颖 蔡志雄 金国胜 尹康 朱柯力 于明 陈贝 周盈 于 2021-07-09 设计创作，主要内容包括：本发明公开了一种带內环板的新型避雷针,包括上段钢管和下段钢管,上段钢管朝向下段钢管的端面设有上段法兰盘,上段法兰盘和上段钢管之间固定有多块上加劲板,上段钢管内固定有上内环板,上内环板与上加劲板的顶端平齐；下段钢管朝向上段钢管的端面设有下段法兰盘,下段法兰盘和下段钢管之间固定有多块下加劲板,下段钢管内固定有下内环板,下内环板与下加劲板的底端平齐。本发明的优点是：通过加装内环板提高钢管管壁面外刚度来改善应力集中,并同时增加了节点的平面外刚度,提高疲劳寿命,降低避雷针脆性断裂事故的发生。(The invention discloses a novel lightning rod with an inner ring plate, which comprises an upper section steel pipe and a lower section steel pipe, wherein an upper section flange plate is arranged on the end surface of the upper section steel pipe, which faces the lower section steel pipe, a plurality of upper stiffening plates are fixed between the upper section flange plate and the upper section steel pipe, an upper inner ring plate is fixed in the upper section steel pipe, and the upper inner ring plate is flush with the top end of the upper stiffening plate; the end face of the lower section steel pipe facing the upper section steel pipe is provided with a lower section flange plate, a plurality of lower stiffening plates are fixed between the lower section flange plate and the lower section steel pipe, a lower inner ring plate is fixed in the lower section steel pipe, and the lower inner ring plate is flush with the bottom end of the lower stiffening plate. The invention has the advantages that: the stress concentration is improved by additionally arranging the inner ring plate to improve the outer rigidity of the pipe wall surface of the steel pipe, the outer rigidity of the plane of the node is increased, the fatigue life is prolonged, and the occurrence of brittle fracture accidents of the lightning rod is reduced.)

1. The utility model provides a novel lightning rod of interior crown plate in area which characterized in that: the steel pipe comprises an upper section steel pipe (1) and a lower section steel pipe (2), wherein an upper section flange (3) is arranged on the end face, facing the lower section steel pipe (2), of the upper section steel pipe (1), a plurality of upper stiffening plates (5) are fixed between the upper section flange (3) and the upper section steel pipe (1), an upper inner ring plate (6) is fixed in the upper section steel pipe (1), and the upper inner ring plate (6) is flush with the top ends of the upper stiffening plates (5);

the end face, facing the upper section steel pipe (1), of the lower section steel pipe (2) is provided with a lower section flange plate (4), a plurality of lower stiffening plates (8) are fixed between the lower section flange plate (4) and the lower section steel pipe (2), a lower inner ring plate (9) is fixed in the lower section steel pipe (2), and the lower inner ring plate (9) is flush with the bottom end of the lower stiffening plate (8).

2. The new lightning rod with inner ring plate as claimed in claim 1, wherein: the upper stiffening plate (5) is fixedly connected with the upper section flange plate (3) and the upper section steel pipe (1) through welding.

3. The new lightning rod with inner ring plate as claimed in claim 1, wherein: the lower stiffening plate (8) is fixedly connected with the lower section flange plate (4) and the lower section steel pipe (2) through welding.

4. The new lightning rod with inner ring plate as claimed in claim 1, wherein: the upper stiffening plate (5) and the lower stiffening plate (8) are identical in shape and arranged in a mirror image mode relative to the contact surfaces of the upper section flange plate (3) and the lower section flange plate (4), the bottom end of the upper stiffening plate (5) is radially arranged along the upper section flange plate (3) and extends to the edge of the upper section flange plate (3), the top end of the upper stiffening plate (5) is parallel to the bottom end, and the length of the top end is smaller than that of the bottom end.

5. The new lightning rod with inner ring plate as claimed in claim 1, wherein: the upper inner ring plate (6) is annular, and the outer diameter of the upper inner ring plate is equal to the inner diameter of the upper section steel pipe (1); the lower inner ring plate (9) is also in a ring shape, and the outer diameter of the lower inner ring plate is equal to the inner diameter of the lower section steel pipe (2).

6. The new lightning rod with inner ring plate as claimed in claim 1, wherein: the upper inner ring plate (6) is fixed on the inner wall of the upper section steel pipe (1) by welding; the lower inner ring plate (9) is fixed on the inner wall of the lower section steel pipe (2) by welding.

7. The new lightning rod with inner ring plate as claimed in claim 1, wherein: the upper section flange plate (3) is fixedly connected with the lower section flange plate (4) through bolts (7).

Technical Field

The invention relates to a novel lightning rod with an inner ring plate.

Background

In order to avoid damage to important electrical elements in a transformer substation caused by lightning and influence on the overall operation of a power system, a lightning rod needs to be installed in actual transformer substation engineering to ensure the safety of electrical equipment in the transformer substation. The single-rod type steel pipe lightning rod is widely applied to an electric power system due to the advantages of simple structure, easy standardization of segments, convenient installation and the like. As the lightning rod is usually dozens of meters high, the lightning rod is convenient to transport, manufacture and install, and the single-rod steel tube lightning rod is usually formed into a whole by connecting a plurality of sections of round steel tubes through flexible or rigid flanges. In actual engineering, rigid flange connection is generally adopted to ensure the rigidity and the bearing performance of a connection node.

In practical application, the broken accident of single-pole lightning rod takes place occasionally, and main destruction appears near the flange, all is fragile destruction moreover, and the destruction phenomenon mainly includes the steel pipe fracture near the flange, and the flange bolt fracture, the flange and the welding seam fracture etc. of steel pipe.

The main reasons for the damage of the rigid flange connection single-rod lightning rod are long-term wind load effect, corrosion and other factors, the flange bolt pretightening force is easy to loose, the welding seam at the joint of the steel pipe and the flange is corroded, the stress concentration at the joint of the stiffening rib and the steel pipe is easy to occur, and the initial defect of fatigue damage is easy to cause at the joint of the flange, so that the lightning rod is brittle and damaged to collapse. Therefore, stress concentration of the node is improved by arranging the inner ring plate in the position pipe at the top end of the stiffening rib to improve the external rigidity of the pipe wall surface, so that the fatigue life is prolonged, the lightning rod is prevented from brittle fracture, and the method has important significance for improving the engineering safety of the transformer substation.

Disclosure of Invention

The invention aims to provide a novel lightning rod with an inner ring plate, which can effectively solve the problem of stress concentration of the existing lightning rod at a stiffening rib.

In order to solve the technical problems, the invention is realized by the following technical scheme: a novel lightning rod with inner ring plates comprises an upper section steel pipe and a lower section steel pipe, wherein an upper section flange plate is arranged on the end face, facing the lower section steel pipe, of the upper section steel pipe, a plurality of upper stiffening plates are fixed between the upper section flange plate and the upper section steel pipe, an upper inner ring plate is fixed in the upper section steel pipe, and the upper inner ring plate is flush with the top ends of the upper stiffening plates;

the end face of the lower section steel pipe facing the upper section steel pipe is provided with a lower section flange plate, a plurality of lower stiffening plates are fixed between the lower section flange plate and the lower section steel pipe, a lower inner ring plate is fixed in the lower section steel pipe, and the lower inner ring plate is flush with the bottom end of the lower stiffening plate.

Preferably, the upper stiffening plate is fixedly connected with the upper section flange plate and the upper section steel pipe through welding, and the upper stiffening plate can be fixedly connected with the upper section flange plate and the upper section steel pipe in a long-term stable manner through welding.

Preferably, the lower stiffening plate is fixedly connected with the lower section flange plate and the lower section steel pipe through welding, and the lower stiffening plate can be fixedly connected with the lower section flange plate and the lower section steel pipe in a long-term stable manner through a welding mode.

Preferably, the upper stiffening plate and the lower stiffening plate are identical in shape and arranged in a mirror image mode relative to the contact surface of the upper section flange plate and the lower section flange plate, the bottom end of the upper stiffening plate is arranged along the radial direction of the upper section flange plate and extends to the edge of the upper section flange plate, the top end of the upper stiffening plate is parallel to the bottom end, the length of the top end is smaller than that of the bottom end, the contact area between the stiffening plate and the corresponding flange plate is increased as much as possible, stress concentration is reduced, and meanwhile the shape of the stiffening plate ensures enough support strength and reduces the size of the stiffening plate.

Preferably, the upper inner ring plate is circular, and the outer diameter of the upper inner ring plate is equal to the inner diameter of the upper section steel pipe; the lower inner ring plate is also in a ring shape, and the outer diameter of the lower inner ring plate is equal to the inner diameter of the lower section steel pipe; the inner ring plate can be attached to the steel pipe as tightly as possible, and stress concentration is avoided.

Preferably, the upper inner ring plate is fixed on the inner wall of the upper section steel pipe by welding; the lower inner ring plate is fixed on the inner wall of the lower section steel pipe through welding, and the inner ring plate can be fixedly connected with the steel pipe stably for a long time in a welding mode.

Preferably, the upper section flange plate is fixedly connected with the lower section flange plate through bolts, so that the upper section steel pipe and the lower section steel pipe can be conveniently installed and fixed.

Compared with the prior art, the invention has the advantages that: the reinforcing rib is narrow at the top and wide at the bottom, and is similar to the geometrical characteristic of a trapezoid, so that the rigidity of the reinforcing rib is gradually reduced along with the height, stress concentration often occurs in the top area, the upper inner ring plate is additionally arranged at the position, which is flush with the upper reinforcing plate, in the upper section steel pipe, and the lower inner ring plate is additionally arranged at the position, which is flush with the lower reinforcing plate, of the lower section steel pipe, so that the problem of stress concentration of the lightning rod at the reinforcing plate is solved, the stress concentration is improved by additionally arranging the inner ring plates to improve the outer rigidity of the pipe wall surface of the steel pipe, the outer rigidity of the plane of a node is increased, the fatigue life is prolonged, and the brittle fracture accident of the lightning rod is reduced.

Drawings

Fig. 1 is a sectional view of a novel lightning rod with an inner ring plate according to the invention;

fig. 2 is a sectional view taken along line a-a of fig. 1.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 and 2, the embodiment of the novel lightning rod with the inner ring plate of the invention is shown, and the novel lightning rod with the inner ring plate mainly comprises an upper steel pipe 1 and a lower steel pipe 2, wherein an upper flange 3 is welded on the bottom surface of the upper steel pipe 1, eight upper stiffening plates 5 are uniformly distributed on the outer side wall of the bottom of the upper steel pipe 1, the upper stiffening plates 5 are in a right trapezoid shape, the upper stiffening plates 5 are vertically arranged, the bottom end of each upper stiffening plate is fixedly connected with the top surface of the upper flange 3 in a welding manner, the other right-angle side of each upper stiffening plate 5 is also fixedly connected with the side wall of the upper steel pipe 1 in a welding manner, an upper inner ring plate 6 is welded in the upper steel pipe 1, the upper inner ring plate 6 is in a circular ring shape, the middle of each upper inner ring plate is hollow, the outer diameter of each upper inner ring plate 6 is equal to the inner diameter of the upper steel pipe 1, and the upper inner ring plate 6 can be in a clearance fit during actual manufacturing process so as to conveniently place the upper inner ring plate 1, the top surface of the upper inner ring plate 6 is flush with the top surface of the upper stiffening plate 5 so as to offset the stress on the upper section steel pipe 1 caused by the top of the upper stiffening plate 5.

The top surface of the lower section steel pipe 2 is welded with a lower section flange plate 4, eight lower stiffening plates 8 are evenly distributed on the outer side wall of the bottom of the lower section steel pipe 2, the structure of each lower stiffening plate 8 is consistent with that of each upper stiffening plate 5, the longer bottom edge of each lower stiffening plate 8 is welded with the bottom surface of the lower section flange plate 4, the other right-angle edge of each lower stiffening plate 8 is welded with the side wall of the lower section steel pipe 2, a lower inner ring plate 9 is welded in the lower section steel pipe 2, the lower inner ring plate 9 is also in a circular ring shape, the middle hollow part is used for fixing the position of the lower inner ring plate 9 when welding is convenient, the outer diameter of the lower inner ring plate 9 is equal to the inner diameter of the lower section steel pipe 2, the lower inner ring plate 9 can be in clearance fit during actual manufacturing, the bottom surface of the lower inner ring plate 9 is flush with the bottom surface of the lower stiffening plate 8, and stress caused by the bottom of the lower stiffening plate 8 on the lower section steel pipe 2 is offset.

The upper section flange 3 is provided with a fixing hole between two adjacent upper stiffening plates 5, the lower section flange 4 is also provided with a fixing hole between adjacent lower stiffening plates 8, and the upper section steel pipe 1 and the lower section steel pipe 2 are fixed together through bolts 7 penetrating through the fixing hole of the upper section flange 3 and the fixing hole of the lower section flange 4.

Because the stiffening ribs are narrow at the top and wide at the bottom, the rigidity of the stiffening ribs is gradually reduced along with the height due to the geometric characteristic similar to a trapezoid, stress concentration often occurs in the top area, the upper inner ring plate 6 is additionally arranged at the position, which is flush with the upper stiffening plate 5, in the upper section steel pipe 1, and the lower inner ring plate 9 is additionally arranged at the position, which is flush with the lower stiffening plate 8, in the lower section steel pipe 2, so that the problem of stress concentration of the lightning rod at the stiffening plate is solved, the stress concentration is improved by additionally arranging the inner ring plates to improve the outer rigidity of the pipe wall surface of the steel pipe, the outer rigidity of the plane of a node is increased, the fatigue life is prolonged, and the occurrence of brittle fracture accidents of the lightning rod is reduced.

The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.