CN219833722U

CN219833722U - Connecting fitting and composite cross arm

Info

Publication number: CN219833722U
Application number: CN202320872680.0U
Authority: CN
Inventors: 顾亚楠; 高凯文; 康胜男; 黄清; 易朱茜
Original assignee: Jiangsu Shemar Electric Co Ltd
Current assignee: Jiangsu Shemar Electric Co Ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-10-13
Anticipated expiration: 2033-04-18

Abstract

The utility model discloses a connecting fitting, which comprises a connecting column, two first connecting pieces and a hanging wire connecting piece. The connecting column is a column body, two first connecting pieces are fixedly connected with two end parts of the connecting column respectively, one end of the hanging wire connecting piece is fixedly connected to the connecting column, and the hanging wire connecting piece extends along the outer peripheral surface of the connecting column to form a semi-surrounding structure. The connecting fitting disclosed by the utility model is lighter in weight and high in strength structurally, low in manufacturing cost and convenient to install. The utility model also discloses a composite cross arm which comprises the connecting fitting and an insulator fixedly connected to the connecting fitting.

Description

Connecting fitting and composite cross arm

Technical Field

The utility model relates to the field of power transmission insulating equipment, in particular to a connecting fitting and a composite cross arm.

Background

In transmission line, the high-voltage end link fitting of compound cross arm is usually more complicated in structure, and weight is also heavier, and its weight occupies great proportion in the compound cross arm of phasing, and the cost is greater than 10% at least to the compound cross arm of phasing simultaneously, has reduced its economic advantage in comparison with traditional scheme, has also brought certain difficulty for construction installation because of its quality is overweight simultaneously. Therefore, a new structure of the high voltage end connection fitting needs to be proposed.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a connecting fitting and a cross arm so as to solve the problems of complex structure, heavy weight, high cost and inconvenient installation of the existing connecting fitting.

In order to achieve the above purpose, the technical means adopted by the utility model are as follows: a connection fitting comprising: the connecting column is a columnar body; the two first connecting pieces are fixedly connected with the two ends of the connecting column respectively; one end of the hanging wire connecting piece is fixedly connected to the connecting column and extends along the outer peripheral surface of the connecting column to form a semi-surrounding structure. The connecting fitting is provided with the connecting column for supporting the first connecting piece and the hanging wire connecting piece, so that the connecting fitting is simple in integral structure and convenient to install.

Preferably, the connecting fitting comprises a second connecting piece, and the second connecting piece is arranged on the connecting column and is positioned on the side opposite to the hanging wire connecting piece. One end of the second connecting piece is abutted with the outer peripheral surface of the connecting column, and the second connecting piece can be used for connecting the cable-stayed insulator.

Preferably, the connecting column is a hollow column. The hollow structure further saves materials, reduces weight and reduces cost.

Preferably, the first connecting member is an annular plate member, and the first connecting member extends outwardly from an outer wall of the end portion of the connecting column in a radial direction of the connecting column.

Preferably, the first connecting member is provided with a first mounting hole for connecting the post insulator.

Preferably, the second connecting member extends along the outer circumferential surface of the connecting post to have a semi-surrounding structure. The semi-surrounding structure further improves the connection strength of the second connecting piece and integrally provides the mechanical strength of the connecting fitting.

Preferably, the number of the second connecting pieces is two, and the two second connecting pieces are arranged at intervals along the axial direction of the connecting column. The cable-stayed insulator is convenient to install.

Preferably, the end faces of the two first connecting pieces on the side far away from the connecting column are parallel to each other.

Preferably, the angle between the two second connectors is in the range of 10 ° to 60 °.

In order to achieve the above object, another technical scheme adopted by the present utility model is as follows: a composite cross arm comprises an insulator and a connecting fitting, wherein any connecting fitting is adopted by the connecting fitting.

The beneficial effects of the utility model are as follows: the utility model is provided with the connecting column, the first connecting piece and the second connecting piece which are connected and fixed with each other to form the connecting fitting, the first connecting piece is used for connecting the pillar insulator, the second connecting piece is used for connecting the cable-stayed insulator, and meanwhile, the hanging wire connecting piece is used for hanging the transmission wire. Compared with the traditional hardware fitting, on one hand, the structure of the connecting hardware fitting is greatly simplified, and the processing difficulty is reduced; secondly, the connecting fitting has the advantages of small weight, small volume, high material utilization rate and low cost; on the other hand, the connection mode of the cross arm fitting and the insulator is simple, and the composite cross arm fitting is convenient to install.

Drawings

Fig. 1 is a schematic perspective view of a connecting fitting 100 according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of the connection fitting 100 of fig. 1 in another view;

FIG. 3 is a schematic perspective view of a composite cross arm 200 according to an embodiment of the present utility model;

fig. 4 is an enlarged schematic view at a in fig. 3.

Detailed Description

As required, specific embodiments of the present utility model will be disclosed herein. However, it is to be understood that the embodiments disclosed herein are merely exemplary of the utility model, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present utility model in virtually any appropriately manner, including employing the various features disclosed herein in connection with features that may not be explicitly disclosed.

Referring to fig. 1 to 2, the present embodiment provides a connecting fitting 100, where the connecting fitting 100 includes a connecting column 110 and a first connecting member 120, and the connecting column 110 is a hollow column body, so that the material usage amount of the connecting fitting 100 can be saved, and the weight can be reduced. The first connection members 120 are provided in two, respectively at both ends of the connection post 110, for connecting the post insulators of the composite cross arm.

In this embodiment, the connecting post 110 has a hollow semi-cylindrical structure, i.e. the cross section of the connecting post 110 is semi-circular, which further saves the material consumption of the connecting fitting 100 and reduces the weight. The first connection member 120 is a semicircular plate member, and the first connection member 120 extends outwardly from an outer wall of an end portion of the connection post 110 in a radial direction of the connection post 110. The outer wall of the end of the connection post 110 includes a semicircular edge and a linear edge connecting both ends of the semicircular edge, the first connection member 120 includes a semicircular portion 121 and a linear portion 122, the semicircular portion 121 is a semicircular plate formed by extending outward from the semicircular edge in the radial direction of the connection post 110, the linear portion 122 is a plate extending along the linear edge of the connection post 110 and connecting both ends of the semicircular portion 121, and the ring widths of the portions of the first connection member 120 are equal, that is, the width of the semicircular portion 121 extending outward from the semicircular edge of the connection post 110 is equal to the width of the linear portion 122 extending outward from the linear edge of the connection post 110, so that the first connection member 120 is disposed on the outer circumferential surface of the end of the connection post 110.

In other embodiments, the first connecting member may be a semicircular plate, and the semicircular first connecting member directly covers both end surfaces of the connecting post. Alternatively, the first connector may be a ring-shaped plate member of another shape, as long as the first connector can be used to connect the post insulators of the composite cross arm, which is not limited herein.

The plate surface of the first connecting piece 120 is also provided with a plurality of first mounting holes 123, the plurality of first mounting holes 123 are distributed on the semicircular part 121 and the linear part 122, the plurality of first mounting holes 123 positioned on the semicircular part 121 are distributed at intervals along the circumferential direction of the semicircular part 121, and the plurality of first mounting holes 123 positioned on the linear part 122 are arranged at intervals along the length direction of the linear part 122 and are used for fixedly connecting the post insulators of the composite cross arm. The two first connecting pieces 120 are oppositely arranged at two ends of the connecting column 110, the end faces of the two first connecting pieces 120 on the side far away from the connecting column 110 can be parallel or not, when the end faces of the two first connecting pieces 120 on the side far away from the connecting column 110 are not parallel, the two first connecting pieces 120 can be arranged at any included angle between planes where the end faces of the two first connecting pieces 120 on the side far away from the connecting column 110 are located, the material consumption of the connecting column 110 is further reduced, the weight and the cost of the connecting fitting 100 can be further reduced, the end faces of the two first connecting pieces 120 on the side far away from the connecting column 110 can be gradually close towards the direction close to the semicircular part 121 or gradually close towards the direction of the linear part 122, as long as the pillar insulators of the composite cross arm can be fixedly connected and the two pillar insulators are arranged in a V shape, and the connecting fitting is not limited.

In order to further reduce the cost, the cross section of the connecting column can be further reduced on the premise of meeting the stress requirement. The cross section of spliced pole can be for the hollow sector that the arc center angle is less than 180, and the outer wall of spliced pole includes arc edge and connects two sharp edges at arc edge both ends, and the tip interconnect that two sharp edges were not connected with the arc edge. Correspondingly, the first connecting piece is a hollow fan-shaped plate, the first connecting piece comprises an arc-shaped part and two straight edge parts, the arc-shaped part is an arc-shaped plate formed by outwards extending an arc-shaped edge in the radial direction of the connecting column, the straight edge parts are plates which extend along the straight edge and are connected with the end parts of the arc-shaped part, the other ends of the two straight edge parts are mutually connected, and the outwards extending width of the arc-shaped part from the arc-shaped edge of the connecting column is equal to the outwards extending width of the straight edge part from the straight edge of the connecting column. The cross section of the connecting column can also be circular arc ring-shaped, the outer wall of the connecting column comprises an arc edge and straight line edges connected with two ends of the arc edge, the arc edge is a minor arc, the connecting plate correspondingly comprises an arc portion and a straight edge portion, and the connecting plate is arranged on the outer peripheral surface of the end portion of the connecting column.

In other embodiments, to improve the mechanical strength of the connection fitting, the cross section of the connection post may be a hollow sector with an arc angle greater than 180 °. According to actual use condition, the connecting column can also be other hollow columnar structures, such as hollow rectangular column, hollow trapezoidal column, etc., then the first connecting piece corresponds for hollow rectangular plate, hollow trapezoidal plate, etc. and the connecting column also can be the solid, as long as can connect compound cross arm can, does not do not specifically limit here.

The connecting fitting 100 further comprises a second connecting piece 130, wherein one end of the second connecting piece 130 is abutted against the outer peripheral surface of the connecting column 110 and is used for connecting the cable-stayed insulator of the composite cross arm. The second connecting piece 130 is arranged at the middle position of the connecting column 110, extends along the outer peripheral surface of the connecting column 110 to form a semi-surrounding structure, and increases the contact area between the second connecting piece 130 and the connecting column 110, so that the connecting fitting 100 is more stable, the integral mechanical strength of the connecting fitting 100 is improved, and the stability of the composite cross arm is further improved. Meanwhile, the second connecting piece 130 is provided with a second mounting hole 131, and the second mounting hole 131 is a through hole and is used for being connected with the cable-stayed insulator.

In this embodiment, the two second connecting pieces 130 are disposed at the same side of the connecting post 110, and the second connecting pieces 130 are disposed along the axial direction of the connecting post 110 at intervals, so that the connecting fitting 100 can be used to connect a double-post double-pull composite cross arm, the double-post double-pull composite cross arm includes two post insulators and two cable-stayed insulators, the mounting heights of the two post insulators are identical, the mounting heights of the two cable-stayed insulators are identical, and the two cable-stayed insulators are all located above the two post insulators, and the included angle range between the two post insulators is 10 ° to 50 °, and the included angle range between the two cable-stayed insulators is 10 ° to 60 °. The two post insulators are respectively connected to the two first connecting pieces 120, and the two cable-stayed insulators are respectively connected to the two second connecting pieces 130, so that the included angle between the two second connecting pieces 130 is 10-60 degrees. Preferably, the distances between the two second connecting pieces 130 and the adjacent first connecting pieces 120 are equal, so that the center of gravity of the connecting fitting 100 is located at the center of the connecting fitting, and the composite cross arm structure is symmetrical and the stress is balanced.

In other embodiments, the second connecting piece may also be provided as one for connecting a double-column single-pull composite cross arm, which includes two column insulators and one cable-stayed insulator. The installation height of the two post insulators is the same, and the cable-stayed insulator is positioned above the two post insulators. Or, the connecting fitting does not include the second connecting piece, only the first connecting piece is arranged for connecting the double-column cross arm, and the double-column cross arm only includes two post insulators. In general, the number of the second connection members is determined according to the specific structure of the composite cross arm, so as to be applicable to more various types of composite cross arms and modified structures thereof, which are not particularly limited herein.

The connection fitting 100 further includes a hanging wire connecting member 140, and the hanging wire connecting member 140 is disposed on the connection post 110. Specifically, one end of the hanging wire connecting piece 140 is fixedly connected to the connecting post 110, is located at the other side opposite to the second connecting piece 130, and extends along the outer peripheral surface of the connecting post 110 to form a semi-surrounding structure. The hanging wire connecting piece 140 is provided with a hanging wire part 141 for hanging the power transmission line. The wire hanging part 141 may be a wire hanging hole, and the number thereof may be one, two or more, and is not particularly limited herein.

The connecting post 110, the first connecting member 120, the second connecting member 130 and the hanging wire connecting member 140 are all metal members and may be made of iron, aluminum, steel or the like. The connection manner among the connection post 110, the first connection member 120, and the second connection member 130 is welding, and of course, other connection manners, such as integral casting, fastening, etc., may also be used, which is not specifically limited herein according to actual use situations. Meanwhile, each vertex angle of the connection post 110, the first connection member 120, the second connection member 130 and the hanging wire connection member 140 is rounded, and no tip is present, so that a tip discharge phenomenon can be effectively avoided.

The connecting fitting 100 of this embodiment has a simple structure, replaces traditional tip fitting that adopts drum welded metal sheet, and connecting fitting 100 contains spare part quantity greatly reduced, consequently greatly reduced connecting fitting's complexity and weight, compare in traditional connecting fitting weight of same voltage class and reduce 55% approximately, reduced the processing degree of difficulty, shortened processing cycle, reduced manufacturing cost simultaneously, and connecting fitting 100 and pillar insulator, draw insulator connected mode to one side simply, also comparatively convenient when actual compound cross arm installs.

As shown in fig. 3, this embodiment further provides a composite cross arm 200, where the composite cross arm 200 is a double-column double-pull composite cross arm 200, and includes a connecting fitting 100, two pillar insulators 210 and two cable-stayed insulators 220, where one ends of the pillar insulators 210 and the cable-stayed insulators 220 are connected together through the connecting fitting 100, and the other ends are respectively connected with an iron tower (not shown). In the present embodiment, the installation heights of the two post insulators 210 are the same, and the installation heights of the two cable-stayed insulators 220 are the same and are both located above the two post insulators 210. The ends of the two post insulators 210 are connected by the connecting fitting 100, so that the manufacturing length of the composite cross arm is reduced, and the manufacturing cost and the transportation cost are reduced; meanwhile, the assembly is easy, and the appearance is attractive and practical.

In other embodiments, the composite cross arm may be a double-column composite cross arm or a double-column single-pull composite cross arm, and the specific structure is as described above and is not illustrated as an example. In a word, the connecting fitting provided by the utility model can be suitable for a composite cross arm comprising two post insulators, and compared with the traditional connecting fitting, the connecting fitting provided by the utility model can be directly and fixedly connected in an included angle of the two post insulators, so that the volume of the connecting fitting is reduced, the materials are saved, the cost is reduced, the number of parts contained in the connecting fitting can be reduced, and the mounting is convenient.

The post insulator 210 includes an insulator, an umbrella skirt coated on the periphery of the insulator, and end fittings sleeved at two ends of the insulator, as shown in fig. 3 and fig. 4, the utility model provides an end fitting 300, where the end fitting 300 is cup-shaped, and is sleeved at one end of the post insulator 210, which is not connected with the tower body of the power transmission tower, for fixedly connecting the post insulator 210 to the connecting fitting 100. The end fitting 300 includes a flange cylinder 310, an end cap 320, a first connection plate 330, and a second connection plate 340. The flange cylinder 310 is arranged in a hollow structure along the axial direction, and one end of the flange cylinder is sleeved at the end part of the post insulator 210; the end cap 320 seals the other end of the flange cylinder 310 away from the post insulator 210, so that corrosion of external water vapor and the like to the post insulator 210 can be avoided, the post insulator 210 can be protected, and the service life of the post insulator 210 can be prolonged. The flange cylinder 310 and the end cap 320 may be integrally formed, or may be separately formed and then connected together by welding or the like. The first connecting plate 330 is a plate, and is disposed on one side of the end cover 320 away from the flange cylinder 310, and a plurality of third mounting holes are formed in the first connecting plate 330, and after the third mounting holes are correspondingly matched with the first mounting holes 123 on the first connecting piece 120, fasteners are inserted, so that the end fitting 300 is fixedly connected with the connecting fitting 100, and then the post insulator 210 is fixedly connected to the connecting fitting 100.

The first connecting plate 330 is further provided with a second connecting plate 340 on a plate surface which is not in contact with the connecting fitting 100, and a side edge of the second connecting plate 340 is abutted with the plate surface of the first connecting plate 330 and extends from the first connecting plate 330 to the end cover 320, that is, the second connecting plate 340 is simultaneously connected with the end cover 320 and the first connecting plate 330. Preferably, the plate surface of the second connecting plate 340 is perpendicular to the plate surface of the first connecting plate 330, and the second connecting plate 340 can be used for supporting the first connecting plate 330, so that the first connecting plate 330 is firmly connected with the connecting fitting 100, and the structural stability of the end fitting 300 is further improved. In this embodiment, the number of the second connection plates 340 is 3 along the radial direction of the flange cylinder 310, and the second connection plates 340 are arranged to avoid the third mounting hole, so that the connection and the installation of the first connection plates 330 and the first connection members 120 are facilitated, and in other embodiments, two, four or other numbers of the second connection plates 340 may be provided, according to practical design, without limitation.

Further, the plate surface of the first connecting plate 330 is disposed at an angle to the surface of the end cap 320, and the angle between the plate surface of the first connecting plate 330, which is not in contact with the connection fitting 100, and the surface of the end cap 320 is defined as the angle between the first connecting plate 330 and the end cap 320, denoted by θ in fig. 4. The second connecting plate 340 is located in the space formed by the included angles, so that the second connecting plate 340 plays a supporting role. The specific value of θ is determined according to the specific design of the composite cross arm 200, specifically, the design of the included angle between the two post insulators 210, and the included angle between the end surfaces of the two first connectors 120 of the connection fitting 100 on the side far away from the connection post 110 needs to be considered, so long as the requirement of the connection angle between the two post insulators 210 can be met, which is not limited herein.

In this embodiment, the composite cross arm 200 is a double-column double-pull composite cross arm 200, and the included angle between the two post insulators 210 is in the range of 10 ° to 50 °. When the end surfaces of the two first connection members 120 on the side far from the connection post 110 are parallel to each other, in order to satisfy the angle setting between the two post insulators 210, the angle range of θ is set to 65 ° to 85 °. When the end surfaces of the two first connecting pieces 120 on the side far from the connecting post 110 are not parallel, when the end surfaces of the two first connecting pieces 120 on the side far from the connecting post 110 are gradually close to each other toward the direction close to the semicircular portion 121, the angle θ needs to be set larger; when the end faces of the two first connecting pieces 120 away from the side of the connecting post 110 are gradually close to each other in the direction of approaching the straight line portion 122, the angle θ needs to be smaller, specifically, the actual design is taken as standard, so long as the design of the included angle between the two post insulators can be satisfied, and no description is repeated.

Meanwhile, the flange cylinder 310, the end cap 320, the first connection plate 330 and the second connection plate 340 are all metal plates, and may be made of iron, aluminum, steel, etc. The connection manner among the end cap 320, the first connection plate 330 and the second connection plate 340 in the end fitting 300 is welding, and of course, other connection manners, such as integral casting, may also be adopted, and the connection manner is not specifically limited herein according to actual use conditions.

The end fitting 300 of the post insulator 210 is connected with the end of the cable-stayed insulator through the connection fitting 100. The post insulator 210 is fixedly connected to the link fitting 100 through a fastener (not shown) and the first mounting hole 123, and the cable-stayed insulator is fixedly connected to the link fitting 100 through a fastener (not shown) and the second mounting hole 131. Of course, it is understood that the connection between the post insulator 210 and the end fitting 300 and the cable-stayed insulator 220 of the present utility model is not limited to the above-described form, but may be other connection forms as deemed appropriate by those skilled in the art.

The end fitting 300 is sleeved at the end of the post insulator 210, so that on one hand, corrosion of external water vapor and the like to the post insulator 210 can be avoided, the post insulator 210 is protected, and the service life of the post insulator 210 is prolonged; on the other hand, in the composite cross arm 200 of the double-column double-pull structure, in the connecting fitting 100 for connecting the high voltage end of the composite cross arm 200, two post insulators 210 are fixedly connected to the connecting fitting 100 through the end fitting 300 by designing the connecting fitting 100 to be matched, so that the two post insulators 210 are connected together. Meanwhile, the end fitting 300 is simple in structure, high in material utilization rate, low in cost and simple in connection mode, and is convenient to install the composite cross arm 200.

While the present disclosure and features have been described above with respect to specific embodiments, it will be appreciated that those skilled in the art, upon attaining the teachings of the present disclosure, may readily devise numerous variations and modifications of the above-described structures and materials, including combinations of features that are individually disclosed or claimed herein, and obviously other combinations of such features. Such variations and/or combinations fall within the technical field to which the utility model relates and fall within the scope of the claims of the utility model.

Claims

1. A connection fitting, comprising:

the connecting column is a columnar body;

the two first connecting pieces are fixedly connected with the two ends of the connecting column respectively;

and one end of the hanging wire connecting piece is fixedly connected to the connecting column and extends along the outer peripheral surface of the connecting column to form a semi-surrounding structure.

2. The fitting according to claim 1, further comprising a second connector disposed on the connection post on a side opposite the hanging wire connector.

3. The fitting according to claim 1, wherein the connecting post is a hollow cylindrical body.

4. The fitting according to claim 1, wherein the first connector is an annular plate member extending outwardly from an outer wall of the connection post end in a radial direction of the connection post.

5. The fitting according to claim 1, wherein the first connector is provided with a first mounting hole for connecting with a post insulator.

6. The fitting according to claim 2, wherein the second connecting piece extends along an outer peripheral surface of the connecting post to have a semi-surrounding structure.

7. The fitting according to claim 2, wherein two of the second connectors are provided, the two second connectors being disposed at intervals along the axial direction of the connecting post.

8. The fitting according to claim 1, wherein end surfaces of the two first connecting pieces on a side away from the connecting post are parallel to each other.

9. The fitting according to claim 7, wherein the angle between the two second connectors is in the range of 10 ° to 60 °.

10. A composite cross arm comprising a link fitting according to any one of claims 1 to 9, and an insulator fixedly attached to the link fitting.