CN117211581A

CN117211581A - Composite cross arm and terminal rod

Info

Publication number: CN117211581A
Application number: CN202311266693.4A
Authority: CN
Inventors: 王文杰; 黄清; 夏法
Original assignee: Jiangsu Shemar Electric Co Ltd
Current assignee: Jiangsu Shemar Electric Co Ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-12-12

Abstract

The application relates to a composite cross arm and a terminal rod, wherein the composite cross arm comprises: a first cross arm; the two second cross arms are respectively connected with two ends of the first cross arm at one end, the other ends of the second cross arms are used for connecting wire clamps, and the length direction of the second cross arms and the length direction of the first cross arms are positioned in the same horizontal plane and are mutually perpendicular; the middle part of the first cross arm is connected with the connecting fitting; the third cross arm, the one end of third cross arm is connected link fitting, the other end of third cross arm is used for connecting the fastener, the length direction of third cross arm sets up along vertical direction. The scheme of the application has the advantages of simple structural design and flexible and convenient assembly under the condition of meeting the strength requirement.

Description

Composite cross arm and terminal rod

Technical Field

The application relates to the technical field of overhead lines, in particular to a composite cross arm and a terminal rod.

Background

The cross arm is an assembly mounted on an electric pole in an overhead line, and mainly serves to support a wire.

The traditional terminal pole adopts iron cross arm (angle steel), and iron cross arm lightning protection level is low, need shelter the processing to iron cross arm in the live working process, and arouses tripping operation because of factors such as thunder and lightning, bird hazard easily. In addition, the iron cross arm is also prone to rust.

The existing single-loop triangular arrangement terminal rod mostly adopts double horizontal cross arms and double top phase cross arms, and a plurality of stud bolts are needed for fixing, so that the installation is inconvenient, the efficiency is low, the cost is high, bird nest is easy to build, and the circuit safety is influenced.

Disclosure of Invention

The application provides a composite cross arm and a terminal rod, which are used for enabling the cross arm to be simple and reliable in structure and convenient to install.

According to the present application there is first provided a composite cross arm comprising:

a first cross arm;

the two second cross arms are respectively connected with two ends of the first cross arm at one end, the other ends of the second cross arms are used for connecting wire clamps, and the length direction of the second cross arms and the length direction of the first cross arms are positioned in the same horizontal plane and are mutually perpendicular;

the middle part of the first cross arm is connected with the connecting fitting;

the third cross arm, the one end of third cross arm is connected link fitting, the other end of third cross arm is used for connecting the fastener, the length direction of third cross arm sets up along vertical direction.

According to an example embodiment of the application, the first cross arm comprises:

a first mandrel;

the middle hardware fitting is connected with the connecting hardware fitting and the middle part of the first core rod;

one end of the two end fittings is connected with two ends of the first core rod, and the other end of the end fittings is used for being connected with a second cross arm;

and the first insulating layer covers at least part of the peripheral surface of the first core rod.

According to the exemplary embodiment of the application, the middle fitting comprises a middle sleeve and a middle connecting piece which are connected, the middle sleeve is sleeved in the middle of the first core rod, a T-shaped groove is formed in the bottom of the middle connecting piece, and the T-shaped groove is matched with a square head bolt to connect the middle connecting piece and the connecting fitting.

According to an exemplary embodiment of the present application, the second cross arm includes a second core rod, a second connection portion, a clip connection portion, and a second insulating layer, the second connection portion and the clip connection portion are respectively connected to both ends of the second core rod, and the second insulating layer covers at least a portion of an outer circumferential surface of the second core rod.

According to an exemplary embodiment of the present application, the second connection portion includes a second sleeve and an end fitting connection portion connected to each other, one end of the second sleeve is connected to one end of the second mandrel, and the end fitting connection portion is used for connecting the end fitting.

According to an exemplary embodiment of the present application, the end fitting connection portion includes two second connection plates disposed in parallel, the second connection plates are perpendicular to a length direction of the second cross arm and extend outwards from a middle portion of the second sleeve, and second connection holes are formed in the second connection plates and are used for connecting the end fitting.

According to an exemplary embodiment of the present application, the wire clip connection portion includes a third sleeve and a third connection plate, where one end of the third sleeve is connected to the other end of the second core rod, the third connection plate extends outward from the other end of the third sleeve, and a third connection hole is provided on the third connection plate, and is used for connecting the wire clip.

According to an exemplary embodiment of the present application, the end fitting includes a first sleeve and a first connection portion connected to each other, one end of the first sleeve is connected to an end of the first mandrel, and the first connection portion is used for connecting the second cross arm.

According to an exemplary embodiment of the present application, the first connection portion is a first connection plate, the first connection plate extends outwards from the other end of the first sleeve, and a first connection hole is formed in the first connection plate and is used for connecting the second cross arm.

According to an exemplary embodiment of the present application, the connecting fitting includes a hoop connecting portion, a horizontal connecting portion and a top connecting portion, which are sequentially connected, the hoop connecting portion is used for connecting an electric pole, the horizontal connecting portion is used for connecting the first cross arm, and the top connecting portion is used for connecting the third cross arm.

The application further provides a terminal pole, which comprises an electric pole, a hoop and the composite cross arm in any implementation mode, wherein the composite cross arm is connected with the electric pole through the hoop.

Under the condition that the strength requirement is met, each part of the cross arm is simple in structure, convenient to manufacture and convenient to assemble flexibly.

The insulating layers are arranged on the outer surfaces of the cross arms, so that the insulating layers have good insulating performance, bird nests can be prevented from being built, and the electrical safety of the cross arms is improved.

The terminal rod provided by the application is convenient to install and maintain in the later period, and can save the operation and maintenance cost.

For a further understanding of the nature and the technical aspects of the present application, reference should be made to the following detailed description of the application and the accompanying drawings, which are included to illustrate and not to limit the scope of the application.

Drawings

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, are included to provide a further understanding of the disclosure. The exemplary embodiments of the present disclosure and their description are for the purpose of explaining the present disclosure and are not to be construed as unduly limiting the present disclosure. In the accompanying drawings:

fig. 1 illustrates a schematic diagram of a terminal pole structure according to an exemplary embodiment of the present application;

FIG. 2 shows a first cross arm construction schematic according to an example embodiment of the application;

fig. 3 shows a schematic diagram of an intermediate fitting structure according to an example embodiment of the application;

FIG. 4 illustrates a partial structural schematic view of a terminal pole having a lag bolt according to an exemplary embodiment of the present application;

fig. 5 shows a schematic diagram of an end fitting structure according to an example embodiment of the application;

FIG. 6 shows a second cross arm construction schematic according to an example embodiment of the application;

fig. 7 shows a schematic structural diagram of a connection fitting according to an exemplary embodiment of the present application;

fig. 8 shows a side view of the connection fitting of the embodiment of fig. 7 according to the application;

fig. 9 shows a schematic structural view of a third cross arm according to an exemplary embodiment of the present application.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, materials, apparatus, etc. In these instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

In the electric power system, the terminal rod is a tower for bearing the tension of a wire at one end of a line, namely, a cross arm arranged on the terminal rod is only hung on the wire at one side and bears the tension of the wire at the one side.

Fig. 1 shows a schematic structural view of a terminal pole 10 and an incorporated composite cross arm 100 according to an embodiment of the present application.

As shown in fig. 1, the present application provides a terminal pole 10 including a composite cross arm 100 and an electric pole 200, wherein the composite cross arm 100 is integrally formed with the terminal pole 10 after being mounted on the electric pole 200. The composite cross arm 100 mainly includes: the electric pole comprises a first cross arm 101, two second cross arms 102, a connecting fitting 103 and a third cross arm 104, wherein the first cross arm 101 is used as a main cross arm to be connected with the electric pole 200, the two second cross arms 102 are respectively arranged on two sides of the first cross arm 101, the two second cross arms 102 are respectively used for hanging wires, the third cross arm 104 is connected to the middle upward position of the first cross arm 101 through the connecting fitting 103, and the top end of the third cross arm 104 is used for hanging wires. So formed single round triangle arrangement's string mode, through a plurality of cross arms and gold utensil combination connection, every part is simple structure, convenient processing, and the assembly is nimble.

According to an exemplary embodiment of the present application, as shown in fig. 2, the first cross arm 101 mainly includes: a first mandrel 1011, a middle fitting 1012, two end fittings 1013, and a first insulating layer 1014.

The middle part of the first cross arm 101 is connected with the connecting fitting 103. The middle fitting 1012 is connected with the middle part of the connecting fitting 103 and the first core rod 1011 and is used for connecting the first cross arm 101 with the connecting fitting 103.

The term "middle portion" as used herein refers to a portion between two ends, and is not strictly a central portion.

One end of the two end fittings 1013 is connected to both ends of the first core rod 1011, and the other ends of the two end fittings 1013 are respectively used to connect the second cross arm 102.

The first insulating layer 1014 covers at least a part of the outer peripheral surface of the first mandrel 1011.

According to an exemplary embodiment of the present application, as shown in fig. 3, the middle fitting 1012 includes a middle sleeve 10121 and a middle connecting member 10122, the middle sleeve 10121 is sleeved on the middle part of the first core rod 1011, and can be sleeved on the outer circumference of the first core rod 1011, and the middle connecting member 10122 is used for connecting with the connecting fitting 103, so as to connect the first cross arm 101 to the connecting fitting 103. The intermediate connector 10122 may be provided as a suitable connection structure, such as a perforated structure or a slotted structure or a plugged, snapped-in structure, etc. The intermediate connector 10122 may be coupled to an outer circumferential surface of the intermediate sleeve 10121.

According to an exemplary embodiment of the present application, as shown in fig. 3, a T-shaped groove 101221 is provided at the bottom of the middle connector 10122, and as shown in fig. 4, the T-shaped groove 101221 is matched with a square bolt a for connecting the middle connector 10122 and the connecting fitting 103, the square bolt a includes a connected head and a threaded connection portion, the head is a square block, the threaded connection portion is a threaded rod, when the connection is installed, the square bolt a is installed in a moving manner from the outer side to the middle side of the T-shaped groove 101221 along the axial direction of the first cross arm 101, the head is clamped in the T-shaped groove 101221, the threaded connection portion extends out of the T-shaped groove 101221, at this time, the axial direction of the square bolt a is perpendicular to the axial direction of the first cross arm 101, and then the extended threaded connection portion passes through a corresponding connection hole on the connecting fitting 103 and is screwed and fixed by a nut, so that the connection between the middle fitting 1012 and the connecting fitting 103 can be achieved. The arrangement is that the middle sleeve 10121 and the first core rod 1011 are not required to be perforated for connection, so that the mechanical property of the core rod 1011 is prevented from being affected by perforation, and further, the potential safety hazard of electric power is avoided.

The cross section of the intermediate sleeve 10121 is arranged to match the cross section of the first mandrel 1011.

As shown in fig. 3, according to an exemplary embodiment of the present application, the T-shaped grooves 101221 are provided in plurality, and the plurality of T-shaped grooves 101221 are arranged side by side.

According to the exemplary embodiment of the application, the T-shaped grooves 101221 are arranged in two symmetrically arranged groups, and each group is provided with a plurality of parallel and parallel T-shaped grooves 101221, so that the stress between the intermediate fitting 1012 and the connecting fitting 103 is more uniform, the connection is reliable, and no torsion occurs.

According to an exemplary embodiment of the present application, as shown in fig. 5, the end fitting 1013 includes a first sleeve 10131 and a first connection portion 10132 connected to each other, one end of the first sleeve 10131 is connected to an end of the first core rod 1011 and can be sleeved on the end of the first core rod 1011, the other end of the first sleeve 10131 is connected to the first connection portion 10132, and the first connection portion 10132 is used for connecting the second cross arm 102.

According to an exemplary embodiment of the present application, the first connection portion 10132 is a first connection plate, which extends outwardly from the other end of the first sleeve 10131, and is provided with a first connection hole 101321 for connecting the second cross arm 102. The first connecting plate is clamped on the end connecting part of the second cross arm 102 after being installed, and is fixedly connected through fasteners such as bolts.

Of course, the structural form of the end fitting 1013 may not be limited by the above structure.

One end of each second cross arm 102 is connected with two ends of the first cross arm 101, and the other end of each second cross arm 102 is used for connecting a wire clamp which is used for hanging wires. As shown in fig. 1, the other ends of the two second cross arms 102 are connected to a first wire clamp B and a second wire clamp C, respectively.

After the installation, the length direction of the second cross arm 102 and the length direction of the first cross arm 101 are positioned in the same horizontal plane and are mutually perpendicular, and the two second cross arms 102 are positioned on the same side of the first cross arm 101.

According to an exemplary embodiment of the present application, as shown in fig. 6, the second cross arm 102 includes a second core rod 1021, a second connection part 1022, a clip connection part 1023, and a second insulating layer 1024, the second connection part 1022 and the clip connection part 1023 being connected to both ends of the second core rod 1021, respectively, the second insulating layer 1024 covering at least a part of the outer circumferential surface of the second core rod 1021.

According to an exemplary embodiment of the present application, the second connection part 1022 includes a second sleeve 10221 and an end fitting connection part 10222 connected, one end of the second sleeve 10221 is connected to one end of the second core rod 1021, for example, is sleeved on one end of the second core rod 1021, and the end fitting connection part 10222 is used to connect the end fitting 1013.

According to an exemplary embodiment of the present application, the end fitting connection part 10222 includes two second connection plates 102221 disposed in parallel, the second connection plates 102221 being perpendicular to the length direction of the second cross arm 102 and extending outward from the middle of the second sleeve 10221, and the second connection plates 102221 being provided with second connection holes 1022211 for connecting the end fittings 1013. The first connection portion 10132 of the end fitting 1013 may be inserted between two parallel second connection plates 102221, and sequentially inserted through the second connection hole 1022211 on one of the second connection plates 102221, the first connection hole 101321 on the first connection portion 10132, and the second connection hole 1022211 on the other second connection plate 102221 by using a bolt, a nut, or other fasteners, and then screwed and fixed, so as to connect the end fitting connection portion 10222 and the end fitting 1013.

According to an exemplary embodiment of the application, the clip connection 1023 is movably connected to the clip, such as with a loop-and-loop hinge or hinge assembly.

According to an exemplary embodiment of the present application, the clip connecting portion 1023 includes a third sleeve 10231 and a third connecting plate 10232 connected, one end of the third sleeve 10231 is connected to the other end of the second core rod 1021, the third connecting plate 10232 extends outward from the other end of the third sleeve 10231, and a third connecting hole 102321 is provided in the third connecting plate 10232 for connecting the clip.

According to an exemplary embodiment of the present application, as shown in fig. 7 and 8, the connection fitting 103 includes a hoop connection portion 1031, a horizontal connection portion 1032, and a top connection portion 1033, which are sequentially connected, the hoop connection portion 1031 is used to connect the electric pole 200, the horizontal connection portion 1032 is used to connect the first cross arm 101, and the top connection portion 1033 is used to connect the third cross arm 104.

According to the exemplary embodiment of the present application, the anchor ear connection portion 1031 includes a vertical connection plate 10311 and a concave block 10312, a connection hole is formed on the vertical connection plate 10311, and is used for connecting the electric pole 200, the concave block 10312 that is arcuately recessed toward the electric pole 200 is formed on the side surface of the vertical connection plate 10311, the concave block 10312 is used for covering the electric pole 200, and the concave block 10312 can semi-surround the electric pole 200. The structure can increase the contact area and ensure firm installation. The concave blocks 10312 may be provided in two, so that the stress between the pole 200 and the anchor ear connection portion 1031 is more uniform, or may be provided in one, three or more, which is not limited in the present application.

According to an exemplary embodiment of the present application, the horizontal connection portion 1032 is vertically connected to the top of the anchor ear connection portion 1031 in the horizontal direction, the horizontal connection portion 1032 includes a horizontal connection plate 10321, the horizontal connection plate 10321 extends vertically and outwardly from the top of the vertical connection plate 10311 of the anchor ear connection portion 1031, and the horizontal connection plate 10321 is provided with a connection hole to be connected to the middle hardware 1012 through the square head bolt a described above, thereby fixing the first cross arm 101 on the horizontal connection plate 10321.

According to an exemplary embodiment of the present application, the top phase connection portion 1033 includes an L-shaped plate 10331, the L-shaped plate 10331 includes a horizontal plate and a vertical plate which are vertically connected to each other, the vertical plate is disposed in a vertical direction, and a middle portion of the vertical plate is vertically connected to the horizontal connection plate 10321, the horizontal plate is disposed in a horizontal direction, and the horizontal plate extends vertically outward from a top portion of the vertical plate in the same direction as an extending direction in which the horizontal connection plate 10321 extends outward from a top portion of the vertical connection plate 10311, such that the horizontal plate of the L-shaped plate 10331 is located above a side of the horizontal connection plate 10321, and the third cross arm 104 is connectable above the horizontal plate, such that the third cross arm 104 is located above a side of the first cross arm 101 after the first cross arm 101 is fixed to the horizontal connection plate 10321 and the third cross arm 104 is fixed to the horizontal plate.

The connecting fitting 103 may be provided with a plurality of reinforcing ribs, for example, the hoop connecting portion 1031 may be provided with a reinforcing rib, that is, a reinforcing rib is provided between two concave blocks 10312, so that the reinforcing rib is simultaneously connected with the two concave blocks 10312, so as to improve the strength of the hoop connecting portion 1031; reinforcing ribs can be arranged on the top phase connection part 1033, namely, the reinforcing ribs can be arranged between two plates of the L-shaped plate 10331, so that the reinforcing ribs are simultaneously connected with the horizontal plate and the vertical plate to improve the strength of the L-shaped plate 10331; reinforcing ribs can also be arranged among the hoop connecting portion 1031, the horizontal connecting portion 1032 and the top connecting portion 1033, namely, the reinforcing ribs are simultaneously connected with the vertical connecting plate 10311 of the hoop connecting portion 1031, the horizontal connecting plate 10321 of the horizontal connecting portion 1032 and the vertical plate of the top connecting portion 1033, so that the overall strength of the connecting fitting 103 is improved.

The connecting fitting 103 may be an integral piece or an assembly, that is, the parts such as the anchor ear connecting portion 1031, the horizontal connecting portion 1032, and the top phase connecting portion 1033 of the connecting fitting 103 may be separately formed and then connected by means of welding or the like, or the connecting fitting 103 may be integrally formed by means of casting or the like, which is not particularly limited in the present application.

The arrangement of the connecting fitting 103 facilitates the assembly of the first cross arm 101 and the third cross arm 104 and the connection of the whole composite cross arm 100 with the electric pole 200.

One end of a third cross arm 104 is connected to the connecting fitting 103, the other end of the third cross arm 104 is used for being connected with a third wire clamp D, and the length direction of the third cross arm 104 is arranged along the vertical direction.

According to an exemplary embodiment of the present application, as shown in fig. 9, the third cross arm 104 includes a third core rod 1041, a bottom connecting portion 1042 and a top connecting portion 1043, the bottom connecting portion 1042 and the top connecting portion 1043 are disposed at two ends of the third core rod 1041, wherein the bottom connecting portion 1042 is used for connecting with the connecting fitting 103, so as to realize assembly of the third cross arm 104 and the first cross arm 101, and the top connecting portion 1043 is used for connecting with the third wire clip D.

According to an exemplary embodiment of the present application, the bottom connecting portion 1042 includes a fourth sleeve 10421 and a plate structure 10422, where the fourth sleeve 10421 is used to socket the third core rod 1041, and a bottom surface of the plate structure 10422 is perpendicular to an axis of the third core rod 1041. The plate structure 10421 may be correspondingly provided with a connection hole to be connected with the L-shaped plate 10331 of the connection fitting 103 through a bolt.

According to an exemplary embodiment of the present application, the top connection portion 1043 includes a fifth sleeve for sleeving the third core rod 1041 and a terminal for connecting the third wire clip D. The section steel structure and the ball socket fitting can be arranged between the third wire clamp D and the top connecting portion 1043, so that the third wire clamp D and the top connecting portion 1043 are movably connected, or the connection of the third wire clamp D and the top connecting portion 1043 can be realized by adopting a connecting bracket and a hinge structure, and the application is not limited to the connection.

According to an exemplary embodiment of the present application, the third cross arm 104 further includes a third insulating layer 1044, where the third insulating layer 1044 wraps at least a portion of the outer circumferential surface of the third core rod 1041.

In the present application, the first core rod 1011, the second core rod 1021, and the third core rod 1041 may each be a square rod, a round rod, a triangular core rod, a T-shaped core rod, an L-shaped core rod, or the like, which satisfies the strength.

The first core rod 1011 and the second core rod 1021, the third core rod 1041 may have different structures, or may have the same structure, for example, the cross section of the first core rod 1011 is square, the cross section of the second core rod 1021 is circular, the cross section of the third core rod 1041 is T-shaped, or the cross section of the first core rod 1011 and the cross section of the second core rod 1021, the cross section of the third core rod 1041 are both square or both circular, etc., which is not limited by the present application.

According to the exemplary embodiment of the present application, the first core rod 1011 is a triangular core rod, the second core rod 1021 is a square rod, and the third core rod 1041 is a round rod, so that the overall structural strength is good, the structure is simple, the cost is low, and the first core rod 1011 can prevent birds from nesting.

The overall length of the composite cross arm 100, the length of each cross arm, the specification of the wire clamp, etc. of the present application can be adjusted accordingly as desired.

The connection modes of the parts are not limited by the embodiment, and other connection modes such as riveting, welding and the like can be set according to requirements besides the bolt connection and the hinge connection.

According to one embodiment of the present application, each of the first insulating layer 1014, the second insulating layer 1024 and the third insulating layer 1044 may include a sheath, and the sheath of each insulating layer is in sealing connection with the connectors on both sides of each corresponding mandrel.

According to one embodiment of the application, each insulating layer may further comprise umbrella skirts arranged on the sheath at intervals, so that the creepage distance of the outer surface of each cross arm can be increased, birds can be prevented from nesting, and the overall electrical safety of the composite cross arm 100 is improved.

According to one embodiment of the application, the insulating layer may be high-temperature vulcanized silicone rubber, specifically, the silicone rubber material is coated on the outer periphery of the core rod through an integral vacuum injection molding process, and of course, the coating mode may also be a mold pressing process or a pre-molding process and then sleeved on the outer periphery of the core rod, so that the high-temperature vulcanized silicone rubber insulating layer is integrally formed. The high-temperature vulcanized silicone rubber has good ageing resistance and hydrophobic migration, and can reduce the probability of pollution flashover and rain flashover.

The present disclosure also proposes a terminal pole 10, as shown in fig. 1, comprising an electric pole 200, a hoop 300 and a composite cross arm 100, the composite cross arm 100 being connected with the electric pole 200 by the hoop 300.

As shown in fig. 1, the anchor ear 300 may be a U-shaped anchor ear, and the anchor ear 300 and the connecting fitting 103 may be connected through a connecting hole of the vertical connecting plate 10311, for example, a threaded rod extending after the U-shaped anchor ear is tightly held by the electric pole 200 may pass through the connecting hole of the vertical connecting plate 10311, and may be screwed by a nut, so that the composite cross arm 100 is fixed on the electric pole 200. Alternatively, the anchor 300 may be used to secure the composite cross arm 100 to the pole 200 by installing fasteners.

Hoop 300 may be implemented using prior art techniques and is not described in detail herein.

According to one embodiment of the present application, when the terminal pole 10 is used for a single loop transmission line, three-phase wires need to be hooked on the terminal pole 10, and the terminal pole 10 includes the pole 200, the anchor ear 300, and the composite cross arm 100 is connected to the pole 200 through the anchor ear 300. The composite cross arm 100 comprises a first cross arm 101, two second cross arms 102, a connecting fitting 103 and a third cross arm 104, wherein a top connecting part 1043 of the third cross arm 104 is connected with a third wire clamp D, two ends of the first cross arm 101 are respectively connected with a first wire clamp B and a second wire clamp C through the second cross arms 102, so that a single-loop triangle-arranged wire hanging form can be formed, a three-phase wire can be hung, and the single-loop wire hanging requirement of the terminal rod 10 is met. The specific structure and connection manner of the components of the composite cross arm 100 are as described above, and will not be described again.

According to one embodiment of the present application, when the terminal pole 10 is used in a dual-loop transmission line, six-phase conductors need to be hung on the terminal pole 10, and at this time, the terminal pole 10 includes an electric pole 200, three hoops 300 and three composite cross arms 100, the composite cross arms 100 are connected with the electric pole 200 through the hoops 300, and the three composite cross arms 100 are disposed on the electric pole 200 at intervals in parallel along the vertical direction. The composite cross arm 100 comprises a first cross arm 101, two second cross arms 102 and a connecting fitting 103, wherein two ends of each first cross arm 101 are respectively connected with a first wire clamp B and a second wire clamp C through the second cross arms 102, so that a horizontally arranged hanging wire form can be formed to hang six-phase wires, and the double-loop hanging wire requirement of the terminal rod 10 is met. The specific structure and connection manner of the components of the composite cross arm 100 are as described above, and will not be described again.

The transmission pole provided by the application is convenient to install and maintain in the later period, and can save the operation and maintenance cost.

The "top" or "top", "bottom" and the like refer to the relative positions of the components and the ground after the composite cross arm 100 is mounted on the pole 200, and the side far from the ground is "top", and the side close to the ground is "bottom".

Finally, it should be noted that: the foregoing description is only exemplary embodiments of the present disclosure, and not intended to limit the disclosure, but although the disclosure is described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A composite cross arm, comprising:

a first cross arm;

2. The composite cross arm of claim 1, wherein the first cross arm comprises:

a first mandrel;

one end of the two end fittings is connected with two ends of the first core rod, and the other end of the end fittings is used for connecting the second cross arm;

3. The composite cross arm of claim 2, wherein the middle fitting comprises a middle sleeve and a middle connecting piece which are connected, the middle sleeve is sleeved on the middle part of the first core rod, a T-shaped groove is formed in the bottom of the middle connecting piece, and the T-shaped groove is matched with a square head bolt to connect the middle connecting piece and the connecting fitting.

4. The composite cross arm of claim 2, wherein the second cross arm comprises a second core rod, a second connecting portion, a wire clip connecting portion, and a second insulating layer, the second connecting portion and the wire clip connecting portion are respectively connected to two ends of the second core rod, and the second insulating layer covers at least part of an outer circumferential surface of the second core rod.

5. The composite cross arm of claim 4, wherein the second connection portion comprises a second sleeve and an end fitting connection portion connected to each other, an end of the second sleeve being connected to an end of the second mandrel, the end fitting connection portion being configured to connect the end fitting.

6. The composite cross arm of claim 5, wherein the end fitting connection portion includes two second connection plates disposed in parallel, the second connection plates being perpendicular to a length direction of the second cross arm and extending outward from a middle portion of the second sleeve, and second connection holes being provided on the second connection plates for connecting the end fittings.

7. The composite cross arm of claim 4, wherein the wire clip connection portion includes a third sleeve and a third connection plate connected to each other, one end of the third sleeve is connected to the other end of the second core rod, the third connection plate extends outward from the other end of the third sleeve, and a third connection hole is formed in the third connection plate, and is used for connecting the wire clip.

8. The composite cross arm of claim 2, wherein the end fitting includes a first sleeve and a first connection portion connected, one end of the first sleeve being connected to an end of the first mandrel, the first connection portion being for connecting the second cross arm.

9. The composite cross arm of claim 8, wherein the first connecting portion is a first connecting plate, the first connecting plate extends outwards from the other end of the first sleeve, and a first connecting hole is formed in the first connecting plate and is used for connecting the second cross arm.

10. The composite cross arm of claim 1, wherein the link comprises a hoop connecting portion, a horizontal connecting portion and a top connecting portion connected in sequence, the hoop connecting portion is used for connecting an electric pole, the horizontal connecting portion is used for connecting the first cross arm, and the top connecting portion is used for connecting the third cross arm.

11. A termination pole comprising an electrical pole, a hoop and a composite cross arm according to any one of claims 1 to 10, the composite cross arm being connected to the pole by the hoop.