阅读说明：本技术 一种带芯管的新型避雷针 (Novel lightning rod with core pipe ) 是由 胡宇鹏 方瑜 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芯管的新型避雷针,包括上段钢管和下段钢管,上段钢管内径小于下段钢管；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,上段钢管内固定有内环板,内环板与上加劲板的顶端平齐,上段法兰盘上固定有朝向下段钢管延伸的芯管；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,芯管的下段伸入下段钢管内,芯管的外径与下段钢管内径相等,芯管的底端与下加劲板的底端平齐。本发明的优点是：芯管与内环板总体上可以提升法兰节点的承载力和疲劳寿命,降低避雷针脆性断裂事故的发生。(The invention discloses a novel lightning rod with a core pipe, which comprises an upper section steel pipe and a lower section steel pipe, wherein the inner diameter of the upper section steel pipe is smaller than that of the lower section steel pipe; the end face, facing the lower section steel pipe, of the upper section steel pipe is provided with an upper section flange plate, a plurality of upper stiffening plates are fixed between the upper section flange plate and the upper section steel pipe, an inner ring plate is fixed in the upper section steel pipe, the inner ring plate is flush with the top end of the upper stiffening plate, and a core pipe extending towards the lower section steel pipe is fixed on the upper section flange 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, the lower section of the core pipe extends into the lower section steel pipe, the outer diameter of the core pipe is equal to the inner diameter of the lower section steel pipe, and the bottom end of the core pipe is flush with the bottom end of the lower stiffening plates. The invention has the advantages that: the bearing capacity and the fatigue life of the flange joint can be improved by the core tube and the inner ring plate as a whole, and the occurrence of brittle fracture accidents of the lightning rod is reduced.)

1. The utility model provides a take novel lightning rod of core pipe which characterized in that: the steel pipe comprises an upper section steel pipe (1) and a lower section steel pipe (2), wherein the inner diameter of the upper section steel pipe (1) is smaller than that of the lower section steel pipe (2); 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 inner ring plate (6) is fixed in the upper section steel pipe (1), the inner ring plate (6) is flush with the top ends of the upper stiffening plates (5), and a core pipe (7) extending towards the lower section steel pipe (2) is fixed on the upper section flange (3);

the end face of the lower section steel pipe (2) facing the upper section steel pipe (1) is provided with a lower section flange plate (4), a plurality of lower stiffening plates (9) are fixed between the lower section flange plate (4) and the lower section steel pipe (2), the lower end of the core pipe (7) extends into the lower section steel pipe (2), the outer diameter of the core pipe (7) is equal to the inner diameter of the lower section steel pipe (2), and the bottom end of the core pipe (7) is flush with the bottom end of the lower stiffening plates (9).

2. The new lightning rod with core tube according to claim 1, characterized in that: 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 core tube according to claim 1, characterized in that: the upper stiffening plate (5) and the lower stiffening plate (9) 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.

4. The new lightning rod with core tube according to claim 1, characterized in that: the inner ring plate (6) is annular, and the outer diameter of the inner ring plate is equal to the inner diameter of the upper section steel pipe (1).

5. The new lightning rod with core tube according to claim 1, characterized in that: the inner ring plate (6) is fixed on the inner wall of the upper section steel pipe (1) through welding.

6. The new lightning rod with core tube according to claim 1, characterized in that: the upper section flange plate (3) is fixedly connected with the lower section flange plate (4) through bolts (8).

Technical Field

The invention relates to a novel lightning rod with a core pipe.

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 a core pipe, 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 a core pipe comprises an upper section steel pipe and a lower section steel pipe, wherein the inner diameter of the upper section steel pipe is smaller than that of the lower section steel pipe; the end face, facing the lower section steel pipe, of the upper section steel pipe is provided with an upper section flange plate, a plurality of upper stiffening plates are fixed between the upper section flange plate and the upper section steel pipe, an inner ring plate is fixed in the upper section steel pipe, the inner ring plate is flush with the top end of the upper stiffening plate, and a core pipe extending towards the lower section steel pipe is fixed on the upper section flange 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, the lower section of the core pipe extends into the lower section steel pipe, the outer diameter of the core pipe is equal to the inner diameter of the lower section steel pipe, and the bottom end of the core pipe is flush with the bottom end of the lower stiffening plates.

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 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 inner ring plate is circular, the outer diameter of the inner ring plate is equal to the inner diameter of the upper 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 inner ring plate is fixed on the inner wall of the upper 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 stiffening ribs are narrow at the top and wide at the bottom, and are similar to the trapezoidal geometric characteristics, so that the rigidity of the stiffening ribs is gradually reduced along with the height, stress concentration often occurs in the top area, the inner ring plate is additionally arranged at the position, which is flush with the upper stiffening plate, in the upper section steel pipe, the stress of the upper section steel pipe at the top position of the upper stiffening plate is reduced through the arrangement of the inner ring plate, meanwhile, the core pipe extending towards the lower section steel pipe is fixed on the upper section flange plate, the core pipe inserted into the lower section steel pipe is utilized, the bottom end of the core pipe is flush with the bottom end of the lower stiffening plate, the stress of the lower section steel pipe at the bottom position of the lower stiffening plate is reduced, the bearing capacity and the fatigue life of a flange node can be improved on the whole by the core pipe and the inner ring plate, and the occurrence of brittle fracture accidents of the lightning rod is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a novel lightning rod with a core tube according to the present invention;

fig. 2 is a schematic structural diagram of an upper steel tube in a novel lightning rod with a core tube according to the invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 4 is a sectional view taken along line B-B in 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 to 4, the embodiment of the novel lightning rod with the core tube of the present invention is shown, and the novel lightning rod with the core tube includes an upper steel tube 1 and a lower steel tube 2, wherein the inner diameter of the upper steel tube 1 is smaller than that of the lower steel tube 2; the bottom surface of the upper section steel pipe 1 is welded with the upper section flange plate 3, eight upper stiffening plates 5 are uniformly distributed on the outer side wall of the bottom of the upper section steel pipe 1, the upper stiffening plates 5 are right trapezoid-like, 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 section flange plate 3 in a welding mode, the other right-angle side of each upper stiffening plate 5 is also fixedly connected with the side wall of the upper section steel pipe 1 in a welding mode, an inner ring plate 6 is welded in the upper section steel pipe 1, the inner ring plate 6 is circular and hollow in the middle, the outer diameter of the inner ring plate 6 is equal to the inner diameter of the upper section steel pipe 1, the inner ring plate 6 can be in clearance fit during actual manufacturing, the inner ring plate 6 can be conveniently placed in the upper section steel pipe 1, the top surface of the inner ring plate 6 is flush with the top surface of the upper stiffening plates 5, and stress caused by the top of the upper stiffening plates 5 on the upper section steel pipe 1 is offset. An 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 stress of the upper section steel pipe 1 at the top position of the upper stiffening plate 5 is reduced through the arrangement of the inner ring plate 6.

The top surface of the lower section steel pipe 2 is welded with a lower section flange plate 4, eight lower stiffening plates 9 are uniformly distributed on the outer side wall of the bottom of the lower section steel pipe 2, the structure of each lower stiffening plate 9 is consistent with that of each upper stiffening plate 5, the longer bottom edge of each lower stiffening plate 9 is welded with the bottom surface of the lower section flange plate 4, and the other right-angle edge of each lower stiffening plate 9 is welded with the side wall of the lower section steel pipe 2.

The bottom of the upper section flange 3 is welded with a core pipe 7 extending towards the lower section steel pipe 2, the outer diameter of the core pipe 7 is equal to the inner diameter of the lower section steel pipe 2, and after the core pipe 7 is completely inserted into the lower section steel pipe 2, the bottom end of the core pipe 7 is flush with the bottom end of the lower stiffening plate 9. The core tube 7 inserted into the lower section steel tube 2 is utilized, the bottom end of the core tube 7 is flush with the bottom end of the lower stiffening plate 9, the stress of the lower section steel tube 2 at the bottom of the lower stiffening plate 9 is reduced, the bearing capacity and the fatigue life of the flange joint can be improved by the core tube 7 and the inner ring plate 6 as a whole, and the occurrence of brittle fracture accidents of the lightning rod is reduced.

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 9, and the upper section steel pipe 1 and the lower section steel pipe 2 are fixed together through bolts 8 penetrating through the fixing hole of the upper section flange 3 and the fixing hole of the lower section flange 4.

In the prior art, the stress concentration of the stiffening plate is mainly caused by the geometric characteristics of the stiffening plate with a narrow top and a wide bottom and the welding seam for connecting the stiffening plate and the steel pipe. According to the invention, after the core pipe 7 at the bottom of the upper section flange 3 is inserted into the lower section steel pipe 2, the bending rigidity of the joint of the upper and lower steel pipe sections can be increased, the number of the flange stiffening plates is reduced, and the number of welding seams is correspondingly reduced, so that the effect of relieving stress concentration at the node is achieved. An inner ring plate 6 is arranged in the upper section steel pipe 1 at the top of the upper stiffening plate 5, a core pipe 7 is arranged in the lower section steel pipe 2 and extends to the bottom of the lower stiffening plate 9, so that the external stiffness of the pipe wall surface can be improved, and the effect of improving stress concentration is achieved.

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.