Composite cross arm and terminal pole

Abstract

The application relates to a composite cross arm and a terminal rod, and the composite cross arm comprises a first cross arm, two second cross arms, one end of each of the two second cross arms being connected to two ends of the first cross arm, the other end of each of the second cross arms being used for connecting a wire clamp, the length direction of the second cross arm being in the same horizontal plane as the length direction of the first cross arm and being perpendicular to each other, a connecting fitting being connected to the middle part of the first cross arm, a third cross arm, one end of the third cross arm being connected to the connecting fitting, the other end of the third cross arm being used for connecting a wire clamp, and the length direction of the third cross arm being arranged along a vertical direction. The scheme meets the strength requirement, the structure design is simple, and assembly is flexible and convenient.

Description

Technical Field

[0001] This invention relates to the field of overhead line technology, and in particular to a composite crossarm and terminal pole. Background Technology

[0002] A crossarm is a component installed on a pole in an overhead power line, and its main function is to support the conductor.

[0003] Traditional terminal poles use iron crossarms (angle steel), which have low lightning protection levels. During live-line work, the iron crossarms need to be shielded, and they are prone to tripping due to lightning, bird damage, and other factors. In addition, iron crossarms are also prone to corrosion.

[0004] Most current single-circuit delta-arranged terminal poles use double horizontal crossarms and double top phase crossarms, and require multiple double-headed bolts for fixing. This makes installation inconvenient, inefficient, and costly, and it is also prone to creating bird nests, affecting circuit safety. Summary of the Invention

[0005] This application provides a composite crossarm and terminal bar, which makes the crossarm structure simple and reliable and easy to install.

[0006] According to this application, a composite crossarm is first provided, comprising:

[0007] First horizontal support;

[0008] Two second crossarms, one end of each second crossarm is connected to both ends of the first crossarm, and the other end of the second crossarm is used to connect to the wire clamp. The length direction of the second crossarm and the length direction of the first crossarm are in the same horizontal plane and perpendicular to each other.

[0009] A connecting fitting is provided, wherein the middle part of the first crossarm is connected to the connecting fitting;

[0010] The third crossarm has one end connected to the connecting hardware and the other end used to connect to the wire clamp. The length of the third crossarm is set in the vertical direction.

[0011] According to an example embodiment of this application, the first crossarm includes:

[0012] First core rod;

[0013] An intermediate fitting, which connects the middle part of the connecting fitting and the first mandrel;

[0014] Two end fittings, one end of which is connected to both ends of the first mandrel, and the other end of which is used to connect to the second crossarm;

[0015] A first insulating layer covers at least a portion of the outer peripheral surface of the first core rod.

[0016] According to an example embodiment of this application, the intermediate fitting includes a connected intermediate sleeve and an intermediate connector. The intermediate sleeve is sleeved on the middle part of the first mandrel, and the bottom of the intermediate connector is provided with a T-slot. The T-slot cooperates with a square head bolt to connect the intermediate connector and the connecting fitting.

[0017] According to an example embodiment of this application, the second crossarm includes a second core rod, a second connecting portion, a wire clamp connecting portion, and a second insulating layer. The second connecting portion and the wire clamp connecting portion are respectively connected to the two ends of the second core rod, and the second insulating layer covers at least a portion of the outer peripheral surface of the second core rod.

[0018] According to an example embodiment of this application, the second connecting part includes a connected second sleeve and an end fitting connecting part, one end of the second sleeve is connected to one end of the second mandrel, and the end fitting connecting part is used to connect the end fitting.

[0019] According to an example embodiment of this application, the end fitting connection includes two parallel second connecting plates. The second connecting plates are perpendicular to the length direction of the second crossarm and extend outward from the middle of the second sleeve. The second connecting plates are provided with second connecting holes for connecting the end fitting.

[0020] According to an example embodiment of this application, the wire clamp connecting part includes a third sleeve and a third connecting plate connected together. One end of the third sleeve is connected to the other end of the second core rod. The third connecting plate extends outward from the other end of the third sleeve. The third connecting plate is provided with a third connecting hole for connecting the wire clamp.

[0021] According to an example embodiment of this application, the end fitting includes a first sleeve and a first connecting portion connected together. One end of the first sleeve is connected to the end of the first mandrel, and the first connecting portion is used to connect to the second crossarm.

[0022] According to an example embodiment of this application, the first connecting part is a first connecting plate, which extends outward from the other end of the first sleeve, and the first connecting plate is provided with a first connecting hole for connecting the second crossarm.

[0023] According to an example embodiment of this application, the connecting hardware includes a clamp connecting part, a horizontal connecting part, and a top phase connecting part connected in sequence. The clamp connecting part is used to connect the pole, the horizontal connecting part is used to connect the first crossarm, and the top phase connecting part is used to connect the third crossarm.

[0024] This application also proposes a terminal pole, including a pole, a clamp, and a composite crossarm as described in any embodiment, wherein the composite crossarm is connected to the pole via the clamp.

[0025] The crossarm provided in this application has a simple structure, is easy to manufacture, and is easy to assemble, while meeting the strength requirements.

[0026] The crossarm of this application is provided with an insulating layer on its outer surface, which has good insulation performance, can also prevent birds from building nests, and improves the electrical safety of the crossarm.

[0027] The terminal pole provided in this application is easy to install and maintain, thus saving on operation and maintenance costs.

[0028] To further understand the features and technical content of this invention, please refer to the following detailed description and accompanying drawings. However, these descriptions and drawings are only for illustrating the invention and are not intended to limit the scope of protection of the invention in any way. Attached Figure Description

[0029] The embodiments of this disclosure are described in detail below with reference to the accompanying drawings. These drawings, which form part of this disclosure, are used to provide a further understanding of the disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain the disclosure and do not constitute an undue limitation of the disclosure. In the drawings:

[0030] Figure 1 A schematic diagram of a terminal pole structure according to an example embodiment of this application is shown;

[0031] Figure 2 A schematic diagram of a first crossarm structure according to an example embodiment of this application is shown;

[0032] Figure 3 A schematic diagram of an intermediate fitting structure according to an example embodiment of this application is shown;

[0033] Figure 4 A schematic diagram of a partial structure of a terminal rod with square-headed bolts according to an example embodiment of this application is shown;

[0034] Figure 5 A schematic diagram of an end fitting structure according to an example embodiment of this application is shown;

[0035] Figure 6 A schematic diagram of the second crossarm structure according to an example embodiment of this application is shown;

[0036] Figure 7 This diagram illustrates the structure of a connecting fitting according to an example embodiment of this application.

[0037] Figure 8 Shown according to this application Figure 7 Side view of the connecting hardware in the embodiment;

[0038] Figure 9A schematic diagram of the structure of the third crossarm according to an example embodiment of this application is shown. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0040] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0041] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0042] In power systems, a terminal pole is a pole or tower used to bear the tension of the conductor at one end of a line. That is, the crossarm installed on the terminal pole only connects the conductor on one side and bears the tension of the conductor on one side.

[0043] Figure 1 A schematic diagram of the structure of a terminal pole 10 and its included composite crossarm 100 according to an embodiment of this application is shown.

[0044] like Figure 1As shown, this application provides a terminal pole 10, including a composite crossarm 100 and a pole 200, wherein the composite crossarm 100 is installed on the pole 200 to form the terminal pole 10. The composite crossarm 100 mainly includes: a first crossarm 101, two second crossarms 102, connecting hardware 103, and a third crossarm 104. The first crossarm 101 serves as the main crossarm and is connected to the pole 200. The two second crossarms 102 are respectively located on both sides of the first crossarm 101 and are used to hang wires. The third crossarm 104 is connected to the middle upward position of the first crossarm 101 through the connecting hardware 103, and the top of the third crossarm 104 is used to hang wires. This forms a single-loop triangular arrangement for hanging wires. Through the combination and connection of multiple crossarms and hardware, each component has a simple structure, is easy to process, and is flexible in assembly.

[0045] According to the example embodiments of this application, such as Figure 2 As shown, the first crossarm 101 mainly includes: a first core rod 1011, an intermediate fitting 1012, two end fittings 1013 and a first insulating layer 1014.

[0046] The middle part of the first crossarm 101 is connected to the connecting fitting 103. The intermediate fitting 1012 connects the middle part of the connecting fitting 103 and the first mandrel 1011, and is used to connect the first crossarm 101 to the connecting fitting 103.

[0047] It should be noted that, unless otherwise specified, the "middle part" mentioned in this application refers to the area between the two ends, not strictly the center.

[0048] One end of each of the two end fittings 1013 is connected to both ends of the first core rod 1011, and the other ends of each of the two end fittings 1013 are used to connect to the second crossarm 102.

[0049] The first insulating layer 1014 covers at least a portion of the outer peripheral surface of the first core rod 1011.

[0050] According to the example embodiments of this application, such as Figure 3 As shown, the intermediate fitting 1012 includes a connected intermediate sleeve 10121 and an intermediate connector 10122. The intermediate sleeve 10121 is fitted onto the middle of the first mandrel 1011 and can be sleeved onto the outer periphery of the first mandrel 1011. The intermediate connector 10122 is used to connect with the connecting fitting 103, thereby connecting the first crossbeam 101 to the connecting fitting 103. The intermediate connector 10122 can be configured with a suitable connection structure, such as a structure with holes, a structure with grooves, or a structure with plug-in or snap-fit, etc. The intermediate connector 10122 can be connected to the outer peripheral surface of the intermediate sleeve 10121.

[0051] According to the example embodiments of this application, such as Figure 3As shown, a T-slot 101221 is provided at the bottom of the intermediate connector 10122, as... Figure 4 As shown, the T-slot 101221 mates with the square-head bolt A to connect the intermediate connector 10122 and the connecting hardware 103. The square-head bolt A includes a connected head and a threaded connection part. The head is a square block, and the threaded connection part is a threaded rod. During installation, the square-head bolt A is moved from the outside of the T-slot 101221 towards the middle along the axial direction of the first crossarm 101, so that its head is locked in the T-slot 101221, and the threaded connection part extends out of the T-slot 101221. At this time, the axial direction of the square-head bolt A is perpendicular to the axial direction of the first crossarm 101. Then, the extended threaded connection part is passed through the corresponding connecting hole on the connecting hardware 103 and tightened with a nut to fix it, thus realizing the connection between the intermediate hardware 1012 and the connecting hardware 103. With this setting, it is not necessary to drill holes in the intermediate sleeve 10121 and the first core rod 1011 for connection, avoiding the impact of drilling on the mechanical properties of the first core rod 1011, and thus avoiding potential electrical safety hazards.

[0052] The cross-section of the intermediate sleeve 10121 is matched with the cross-section of the first mandrel 1011.

[0053] like Figure 3 As shown, according to the example embodiment of this application, there are multiple T-slots 101221, and the multiple T-slots 101221 are arranged side by side.

[0054] According to the example embodiment of this application, the T-slots 101221 are arranged in two symmetrical groups, with multiple parallel T-slots 101221 in each group, so that the force between the intermediate hardware 1012 and the connecting hardware 103 is more uniform and the connection is more reliable, and torsion will not occur.

[0055] According to the example embodiments of this application, such as Figure 5 As shown, the end fitting 1013 includes a first sleeve 10131 and a first connecting part 10132 connected together. One end of the first sleeve 10131 is connected to the 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 connecting part 10132, which is used to connect the second crossarm 102.

[0056] According to an example embodiment of this application, the first connecting part 10132 is a first connecting plate, which extends outward from the other end of the first sleeve 10131. The first connecting plate is provided with a first connecting hole 101321 for connecting the second crossarm 102. After installation, the first connecting plate is snapped onto the end connecting component of the second crossarm 102 and fixedly connected by bolts or other fasteners.

[0057] Of course, the structure of the end fitting 1013 is not limited by the above structure.

[0058] One end of each of the two second crossarms 102 is connected to one end of the first crossarm 101, and the other end of each second crossarm 102 is used to connect a clamp, which is used to attach a wire. Figure 1 As shown, the other ends of the two second crossarms 102 are connected to the first clamp B and the second clamp C, respectively.

[0059] After installation, the length direction of the second crossarm 102 is in the same horizontal plane as the length direction of the first crossarm 101 and is perpendicular to each other, and the two second crossarms 102 are located on the same side of the first crossarm 101.

[0060] According to the example embodiments of this application, such as Figure 6 As shown, the second crossarm 102 includes a second core rod 1021, a second connecting portion 1022, a wire clamp connecting portion 1023, and a second insulating layer 1024. The second connecting portion 1022 and the wire clamp connecting portion 1023 are respectively connected to the two ends of the second core rod 1021, and the second insulating layer 1024 covers at least a portion of the outer peripheral surface of the second core rod 1021.

[0061] According to an example embodiment of this application, the second connecting part 1022 includes a connected second sleeve 10221 and an end fitting connecting part 10222. One end of the second sleeve 10221 is connected to one end of the second core rod 1021, for example, sleeved on one end of the second core rod 1021. The end fitting connecting part 10222 is used to connect the end fitting 1013.

[0062] According to an example embodiment of this application, the end fitting connection 10222 includes two parallel second connecting plates 102221. The second connecting plates 102221 are perpendicular to the length direction of the second crossbeam 102 and extend outward from the middle of the second sleeve 10221. The second connecting plates 102221 are provided with second connecting holes 1022211 for connecting the end fitting 1013. The first connecting part 10132 of the end fitting 1013 can be inserted between the two parallel second connecting plates 102221. It is then tightened and fixed by bolts, nuts and other fasteners sequentially passing through the second connecting holes 1022211 on one of the second connecting plates 102221, the first connecting hole 101321 on the first connecting part 10132, and the second connecting hole 1022211 on the other second connecting plate 102221, thereby realizing the connection between the end fitting connection 10222 and the end fitting 1013.

[0063] According to an example embodiment of this application, the wire clamp connection 1023 is movably connected to the wire clamp, for example, by means of interlocking hinges or hinge assembly.

[0064] According to an example embodiment of this application, the wire clamp connection part 1023 includes a third sleeve 10231 and a third connecting plate 10232 connected together. 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. The third connecting plate 10232 is provided with a third connecting hole 102321 for connecting the wire clamp.

[0065] According to the example embodiments of this application, such as Figure 7 , 8 As shown, the connecting hardware 103 includes a clamp connecting part 1031, a horizontal connecting part 1032 and a top phase connecting part 1033 connected in sequence. The clamp connecting part 1031 is used to connect the pole 200, the horizontal connecting part 1032 is used to connect the first crossarm 101, and the top phase connecting part 1033 is used to connect the third crossarm 104.

[0066] According to an example embodiment of this application, the clamp connection part 1031 includes a vertical connecting plate 10311 and a concave block 10312. The vertical connecting plate 10311 has a connecting hole for connecting the pole 200. The side of the vertical connecting plate 10311 has a concave block 10312 that is arc-shaped and recessed towards the pole 200. The concave block 10312 is used to cover the pole 200, and can partially surround the pole 200. This structure can increase the contact area and make the installation more secure. Two concave blocks 10312 can be provided to make the force between the pole 200 and the clamp connection part 1031 more even. One, three or more can also be provided. This application does not limit this.

[0067] According to an example embodiment of this application, the horizontal connecting part 1032 is vertically connected to the top of the clamp connecting part 1031 in the horizontal direction. The horizontal connecting part 1032 includes a horizontal connecting plate 10321, which extends vertically outward from the top of the vertical connecting plate 10311 of the clamp connecting part 1031. The horizontal connecting plate 10321 is provided with a connecting hole to be connected to the intermediate hardware 1012 through the aforementioned square head bolt A, thereby fixing the first crossbeam 101 on the horizontal connecting plate 10321.

[0068] According to an example embodiment of this 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 that are perpendicularly connected to each other. The vertical plate is arranged in a vertical direction, and the middle part of the vertical plate is perpendicularly connected to the horizontal connecting plate 10321. The horizontal plate is arranged in a horizontal direction, and the horizontal plate extends vertically outward from the top of the vertical plate. The extension direction is the same as the extension direction of the horizontal connecting plate 10321 extending outward from the top of the vertical connecting plate 10311, so that the horizontal plate of the L-shaped plate 10331 is located on the side above the horizontal connecting plate 10321. A third crossbeam 104 can be connected above the horizontal plate. Thus, when the first crossbeam 101 is fixed on the horizontal connecting plate 10321 and the third crossbeam 104 is fixed on the horizontal plate, the third crossbeam 104 is located on the side above the first crossbeam 101.

[0069] The connecting hardware 103 can be provided with several reinforcing ribs. For example, reinforcing ribs can be provided on the clamp connecting part 1031, that is, reinforcing ribs can be provided between two concave blocks 10312, so that the reinforcing ribs connect the two concave blocks 10312 at the same time, thereby improving the strength of the clamp connecting part 1031. Reinforcing ribs can also be provided on the top phase connecting part 1033, that is, reinforcing ribs can be provided between the two plates of the L-shaped plate 10331, so that the reinforcing ribs connect the horizontal plate and the vertical plate at the same time, thereby improving the strength of the L-shaped plate 10331. Reinforcing ribs can also be provided between the clamp connecting part 1031, the horizontal connecting part 1032 and the top phase connecting part 1033, that is, the reinforcing ribs connect the vertical connecting plate 10311 of the clamp connecting part 1031, the horizontal connecting plate 10321 of the horizontal connecting part 1032 and the vertical plate of the top phase connecting part 1033 at the same time, thereby improving the overall strength of the connecting hardware 103.

[0070] The connecting fitting 103 can be an integral part or a combination of parts. That is, the components such as the clamp connecting part 1031, the horizontal connecting part 1032 and the top phase connecting part 1033 of the connecting fitting 103 can be formed separately and then connected by welding or other methods. Alternatively, the connecting fitting 103 can also be formed integrally by casting or other methods. This application does not impose specific restrictions on this.

[0071] The aforementioned connecting hardware 103 facilitates the assembly of the first crossarm 101 and the third crossarm 104, and also facilitates the connection of the composite crossarm 100 as a whole with the pole 200.

[0072] One end of the third crossarm 104 is connected to the connecting hardware 103, and the other end of the third crossarm 104 is used to connect to the third clamp D. The length of the third crossarm 104 is set in the vertical direction.

[0073] According to the example embodiments of this application, such as Figure 9As shown, the third crossarm 104 includes a third core rod 1041, a bottom connecting part 1042, and a top connecting part 1043. The bottom connecting part 1042 and the top connecting part 1043 are located at both ends of the third core rod 1041. The bottom connecting part 1042 is used to connect with the connecting hardware 103, thereby realizing the assembly of the third crossarm 104 and the first crossarm 101. The top connecting part 1043 is used to connect the third clamp D.

[0074] According to an example embodiment of this application, the bottom connecting portion 1042 includes a connected fourth sleeve 10421 and a plate structure 10422. The fourth sleeve 10421 is used to sleeve the third core rod 1041, and the bottom surface of the plate structure 10422 is perpendicular to the axis of the third core rod 1041. The plate structure 10422 may be provided with corresponding connecting holes for bolt connection with the L-shaped plate 10331 of the connecting hardware 103.

[0075] According to an example embodiment of this application, the top connecting portion 1043 includes a connected fifth sleeve and a terminal block. The fifth sleeve is used to fit the third core rod 1041, and the terminal block is used to connect the third wire clamp D. A steel structure and a ball joint fitting can be provided between the third wire clamp D and the top connecting portion 1043 to allow the third wire clamp D and the top connecting portion 1043 to be movably connected. Alternatively, a connecting bracket and a hinge structure can be used to achieve the connection between the two. This application does not limit this.

[0076] According to an example embodiment of this application, the third crossarm 104 further includes a third insulating layer 1044, which covers at least a portion of the outer peripheral surface of the third core rod 1041.

[0077] In this application, the first core rod 1011, the second core rod 1021, and the third core rod 1041 can all be made of square rods, round rods, triangular core rods, T-shaped or L-shaped core rods that meet the strength requirements.

[0078] The first core rod 1011, the second core rod 1021, and the third core rod 1041 can have different or 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, and the cross-section of the third core rod 1041 is T-shaped. Alternatively, the cross-section of the first core rod 1011 and the cross-sections of the second core rod 1021 and the third core rod 1041 can all be square or circular, etc. This application does not impose any restrictions on this.

[0079] According to the example embodiment of this 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. This arrangement makes the overall structure strong, simple, and low in cost, and the first core rod 1011 can prevent birds from nesting.

[0080] The overall length of the composite crossarm 100, the length of each crossarm, and the specifications of the clamps in this application can all be adjusted according to requirements.

[0081] The connection method between the above-mentioned components in this application is not limited to the embodiments. In addition to bolt connection and hinge connection, other connection methods such as riveting and welding can be set as needed.

[0082] According to one embodiment of this application, the first insulating layer 1014, the second insulating layer 1024, and the third insulating layer 1044 may each include a sheath, and the sheath of each insulating layer is sealed to the connectors on both sides of the corresponding core rod.

[0083] According to one embodiment of this application, each insulation layer may further include slats spaced apart on the sheath, which can increase the creepage distance on the outer surface of each crossarm, prevent birds from nesting, and improve the overall electrical safety of the composite crossarm 100.

[0084] According to one embodiment of this application, the insulating layer can be high-temperature vulcanized silicone rubber. Specifically, the silicone rubber material is encapsulated around the mandrel using a vacuum injection molding process. Alternatively, the encapsulation can be performed using a molding process or pre-molded material can be fitted onto the mandrel to form a high-temperature vulcanized silicone rubber insulating layer. High-temperature vulcanized silicone rubber exhibits good aging resistance and hydrophobic migration properties, reducing the probability of flashover and rain flashover.

[0085] This disclosure also proposes a terminal pole 10, such as Figure 1 As shown, it includes a pole 200, a clamp 300, and a composite crossarm 100, with the composite crossarm 100 connected to the pole 200 via the clamp 300.

[0086] like Figure 1 As shown, the clamp 300 can be a U-shaped clamp. The clamp 300 and the connecting hardware 103 can be connected through the connecting holes of the vertical connecting plate 10311. For example, the threaded rod extending out after the U-shaped clamp is clamped onto the pole 200 can pass through the connecting holes of the vertical connecting plate 10311 and be tightened with a nut to fix the composite crossarm 100 onto the pole 200. Alternatively, the clamp 300 can also be fixed onto the pole 200 by installing fasteners.

[0087] The clamp 300 can be achieved using existing technology, which will not be elaborated here.

[0088] According to one embodiment of this application, when the terminal pole 10 is used for a single-circuit transmission line, three-phase conductors need to be hung on the terminal pole 10. In this case, the terminal pole 10 includes a pole 200, a clamp 300, and a composite crossarm 100. The composite crossarm 100 is connected to the pole 200 via the clamp 300. The composite crossarm 100 includes a first crossarm 101, two second crossarms 102, connecting hardware 103, and a third crossarm 104. The top connecting part 1043 of the third crossarm 104 is connected to a third clamp D. The two ends of the first crossarm 101 are connected to a first clamp B and a second clamp C respectively via the second crossarms 102, thereby forming a single-circuit delta-arranged hanging configuration to hang three-phase conductors, meeting the single-circuit hanging requirements of the terminal pole 10. The specific structure and connection method of each component of the composite crossarm 100 are as described above and will not be repeated here.

[0089] According to one embodiment of this application, when the terminal pole 10 is used for a double-circuit transmission line, six-phase conductors need to be hung on the terminal pole 10. In this case, the terminal pole 10 includes a pole 200, three clamps 300, and three composite crossarms 100. The composite crossarms 100 are connected to the pole 200 via the clamps 300, and the three composite crossarms 100 are arranged parallel to each other vertically on the pole 200. Each composite crossarm 100 includes a first crossarm 101, two second crossarms 102, and connecting fittings 103. The two ends of each first crossarm 101 are connected to a first clamp B and a second clamp C respectively via the second crossarms 102, thus forming a horizontally arranged hanging configuration to hang six-phase conductors, meeting the double-circuit hanging requirements of the terminal pole 10. The specific structure and connection method of each component of the composite crossarm 100 are as described above and will not be repeated here.

[0090] The crossarm provided in this application has a simple structure, is easy to manufacture, and is easy to assemble, while meeting the strength requirements.

[0091] The crossarm of this application is provided with an insulating layer on its outer surface, which has good insulation performance, can also prevent birds from building nests, and improves the electrical safety of the crossarm.

[0092] The power transmission poles provided in this application are easy to install and maintain, thus saving on operation and maintenance costs.

[0093] It should be noted that the terms "top" or "top" and "bottom" mentioned above refer to the relative positions of each component of the composite crossarm 100 with the ground after it is installed on the pole 200. The side furthest from the ground is the "top", and the side closest to the ground is the "bottom".

[0094] Finally, it should be noted that the above descriptions are merely exemplary embodiments of this disclosure and are not intended to limit this disclosure. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A composite crossarm, characterized in that, include: First horizontal support; Two second crossarms, one end of each second crossarm is connected to both ends of the first crossarm, and the other end of the second crossarm is used to connect to the wire clamp. The length direction of the second crossarm and the length direction of the first crossarm are in the same horizontal plane and perpendicular to each other. A connecting fitting is provided, wherein the middle part of the first crossarm is connected to the connecting fitting; The third crossarm has one end connected to the connecting hardware and the other end used to connect to the wire clamp. The length of the third crossarm is set in the vertical direction. The second crossarm includes a second core rod, a second connecting part, a wire clamp connecting part, and a second insulating layer. The second connecting part and the wire clamp connecting part are respectively connected to the two ends of the second core rod. The second connecting part is used to connect to the end fittings of the first crossarm. The wire clamp connecting part is used to movably connect the wire clamp. The second insulating layer covers at least a portion of the outer peripheral surface of the second core rod.

2. The composite crossarm as described in claim 1, characterized in that, The first crossarm includes: First core rod; Intermediate fitting, the intermediate fitting connecting the middle part of the connecting fitting and the first mandrel; Two end fittings, one end of each end fitting is connected to both ends of the first mandrel, and the other end of each end fitting is used to connect to the second crossarm; A first insulating layer covers at least a portion of the outer peripheral surface of the first core rod.

3. The composite crossarm as described in claim 2, characterized in that, The intermediate fitting includes a connected intermediate sleeve and an intermediate connector. The intermediate sleeve is fitted onto the middle part of the first mandrel. The bottom of the intermediate connector is provided with a T-slot. The T-slot cooperates with a square head bolt to connect the intermediate connector and the connecting fitting.

4. The composite crossarm as described in claim 1, characterized in that, The second connecting part includes a connected second sleeve and an end fitting connecting part. One end of the second sleeve is connected to one end of the second mandrel, and the end fitting connecting part is used to connect the end fitting.

5. The composite crossarm as described in claim 4, characterized in that, The end fitting connection includes two parallel second connecting plates. The second connecting plates are perpendicular to the length direction of the second crossarm and extend outward from the middle of the second sleeve. The second connecting plates are provided with second connecting holes for connecting the end fitting.

6. The composite crossarm as described in claim 1, characterized in that, The wire clamp connection part includes a third sleeve and a third connecting plate connected together. One end of the third sleeve is connected to the other end of the second core rod. The third connecting plate extends outward from the other end of the third sleeve. The third connecting plate is provided with a third connecting hole for connecting the wire clamp.

7. The composite crossarm as described in claim 2, characterized in that, The end fitting includes a first sleeve and a first connecting part connected together. One end of the first sleeve is connected to the end of the first mandrel, and the first connecting part is used to connect the second crossarm.

8. The composite crossarm as described in claim 7, characterized in that, The first connecting part is a first connecting plate, which extends outward from the other end of the first sleeve. The first connecting plate is provided with a first connecting hole for connecting the second crossarm.

9. The composite crossarm as described in claim 1, characterized in that, The connecting hardware includes a clamp connecting part, a horizontal connecting part and a top phase connecting part connected in sequence. The clamp connecting part is used to connect the pole, the horizontal connecting part is used to connect the first crossarm, and the top phase connecting part is used to connect the third crossarm.

10. A terminal pole, characterized in that, It includes a pole, a clamp, and a composite crossarm as described in any one of claims 1-9, wherein the composite crossarm is connected to the pole via the clamp.

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