Connecting fitting and composite cross arm

Abstract

The utility model discloses a connecting fitting which is used for connecting a composite cross arm to an electric pole, the connecting fitting comprises an electric pole connecting part and a cross arm connecting part which are connected, the electric pole connecting part is connected with the electric pole, the cross arm connecting part is connected with the composite cross arm, and the angle between the composite cross arm and the electric pole can be adjusted. The composite cross arm and the electric pole are connected through the adjustable connecting fitting, the angle between the cross arm and the electric pole can be adjusted according to design requirements, installation is flexible, and connection is reliable; and the independent hardware fitting structure can be suitable for installing composite cross arms with different length specifications, and the application range is wider. The utility model further discloses the composite cross arm.

Description

Technical Field

[0001] The present application relates to the technical field of overhead power transmission lines, and in particular to a connecting hardware and a composite crossarm. Background Art

[0002] Crossarms are components installed on overhead power lines' poles, primarily supporting the conductors. Crossarms are typically secured to the poles using connecting hardware. These hardware is determined by the crossarm's configuration, dimensions, and connection requirements to the pole. Pre-designed dimensions and appropriate hardware are required. During installation, these fittings cannot be adjusted for different installation scenarios and are not universally compatible with crossarms of varying sizes. This makes installation inconvenient and limits their application.

[0003] In addition, traditional transmission poles use iron crossarms, and conductors are hung by installing insulators on the iron crossarms. When the conductors are bare conductors, birds taking off or landing from the transmission poles may simultaneously touch any two conductors or any one conductor and the iron crossarm, forming an energized circuit and causing electric shock. This will directly affect the normal operation of the power infrastructure, leading to accidents such as tripping, and will also cause bird deaths and reduce biodiversity.

[0004] Currently, insulating sheaths are usually installed around bare wires near power poles to protect birds from electric shock. However, this protection method is expensive and has poor long-term effectiveness. It requires regular replacement and maintenance, and has high operating and maintenance costs. Utility Model Content

[0005] In view of the deficiencies of the prior art, one of the objectives of this application is to provide a connecting hardware that can adjust the installation angle between the composite crossarm and the pole to facilitate installation.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in this application is: a connecting hardware for connecting a composite crossarm to an electric pole, the connecting hardware including a connected electric pole connecting part and a crossarm connecting part, the electric pole connecting part connects the electric pole, the crossarm connecting part connects the composite crossarm, and the angle between the composite crossarm and the electric pole is adjustable.

[0007] The pole connecting portion includes a first plate, and a first pole connecting hole is provided on the first plate for abutting and fixing the pole.

[0008] Among them, the cross-arm connecting part includes two second plates, which are respectively connected vertically to the two ends of the first plate, and the two second plates extend in the same direction from the two ends of the first plate away from the first plate. The second plates are provided with fixing holes and adjustment holes, and the fixing holes and adjustment holes are used to make the angle between the composite cross-arm and the pole adjustable.

[0009] The fixed hole is a circular through hole, and the adjusting hole is an arc-shaped hole.

[0010] The third plate member is provided with a second pole connecting hole for matching connection with the pole, and two ends of the third plate member are respectively connected to the other ends of the two second plate members not connected to the first plate member.

[0011] The length of the third plate member in the length direction of the pole is less than the length of the second plate member, and the third plate member is located at the lower part of the second plate member.

[0012] The two second plate members are provided with flanges, the flanges extend perpendicularly from the side of the second plate member close to the pole to the direction away from the first plate member, and the two flanges are located in the same plane as the first plate member.

[0013] The second cross arm is provided below the first cross arm and in the same vertical plane as the first cross arm.

[0014] The second connecting member includes a second sleeve and a second connecting portion connected to each other, the second connecting portion includes a first connecting plate and two second connecting plates, the first connecting plate covers one end of the second sleeve, the two second connecting plates are respectively connected perpendicularly to two ends of the first connecting plate, and the two second connecting plates extend in the same direction away from the second sleeve from the two ends of the first connecting plate.

[0015] The two second connecting plates are provided with two groups of connecting holes corresponding to each other, for matching connection with the connecting member, so that the angle between the second cross arm and the pole is adjustable.

[0016] The connecting member of the present application is adjustable, and the angle between the cross arm and the pole can be adjusted according to design requirements, which is flexible and reliable in installation and connection. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a power transmission pole 1000 of an embodiment of the present application;

[0018] Figure 2 is a structural schematic diagram of a first cross arm 100 of an embodiment of the present application;

[0019] Figure 3This is an enlarged schematic diagram of a partial structure of the first intermediate hardware 120 fixed to the first core rod 110 in one embodiment of the present application;

[0020] Figure 4 yes Figure 2 A magnified schematic diagram of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the wire hanging structure of the second intermediate hardware 130 according to one embodiment of the present application;

[0022] Figure 6 yes Figure 2 A magnified schematic diagram of point B in the middle;

[0023] Figure 7 1 is a partial structural diagram of a first cross arm 100 according to an embodiment of the present application;

[0024] Figure 8 This is a schematic structural diagram of a second cross arm 200 according to an embodiment of the present application;

[0025] Figure 9 1 is a schematic structural diagram of a connection fitting 300 according to an embodiment of the present application;

[0026] Figure 10 It is a structural diagram of a connecting fitting 300 according to another embodiment of the present application. DETAILED DESCRIPTION

[0027] Upon request, specific embodiments of the present application will be disclosed herein. However, it should be understood that the embodiments disclosed herein are merely exemplary of the present application, which may be embodied in various forms. Therefore, the specific details disclosed herein are not to be construed as limiting, but merely as a basis for the claims and as a representative basis for teaching those skilled in the art to variously apply the present application in any appropriate manner in practice, including employing the various features disclosed herein in combination with features that may not be explicitly disclosed herein.

[0028] Unless otherwise expressly specified or limited, the term "connection" as used in this application should be understood in a broad sense, and may refer to direct connection or connection through an intermediate medium. In the description of this application, it should be understood that the orientations or positional relationships indicated by terms such as "upper," "lower," "end," and "one end" are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] In an application scenario, such as Figure 1As shown, the present application provides a transmission pole 1000 , which includes a composite cross arm 10 and an electric pole 20 , wherein the composite cross arm 10 is fixed on the electric pole 20 .

[0030] The composite crossarm 10 includes a first crossarm 100, two second crossarms 200 and two connecting hardware 300. The first crossarm 100 is an inverted V-shaped structure, and the top and both ends of the first crossarm 100 are used to hang wires respectively; the two second crossarms 200 are respectively connected to the opposite sides of the pole 20 to form a V-shaped structure, one end of the two second crossarms 200 is respectively connected to the middle of the first crossarm 100, and the other ends of the two second crossarms 200 are respectively connected to the two sides of the pole 20 through two connecting hardware 300, so that the composite crossarm 10 is connected to the pole 20. The length direction of the second crossarm 200 is inclined, and the second crossarm 200 is arranged below the first crossarm 100 and is located in the same vertical plane as the first crossarm 100.

[0031] The transmission pole 1000 of the present application utilizes a composite crossarm 10 for hanging conductors. The composite crossarm 10 utilizes a fully insulated structure, and the second crossarm 200 elevates the conductor's hanging height. This extends the insulation distance between the conductor at the high-voltage end of the transmission pole 1000 and the top of the pole 20 at the low-voltage end. This prevents birds from forming an electrical circuit regardless of their location on the transmission pole 1000, effectively preventing accidents such as tripping caused by electrocution. This provides increased safety and lowers operational costs. It also effectively reduces the chance of birds being electrocuted and dying from landing on the transmission pole 1000, thereby protecting biodiversity. In conventional solutions, transmission poles support conductors by providing suspended insulators on iron crossarms. Compared to conventional iron crossarms, the present application utilizes a composite crossarm 10 for direct conductor hanging, eliminating the suspended insulator structure. This makes the crossarm structure simpler, installation more convenient, less prone to rust, and results in a longer service life.

[0032] It should be noted that, unless otherwise specified, the middle portion in this application refers to the portion between the two ends, not strictly the central portion.

[0033] Combine Figure 2 As shown, the first cross arm 100 includes two first core rods 110 (marked in the figure for schematic purposes only), two first intermediate hardware 120, a second intermediate hardware 130, two end hardware 140 and a first insulating layer 150. The two first core rods 110 are arranged at an angle; the two first intermediate hardware 120 are respectively connected to one end of the two second cross arms 200 and the middle of the two first core rods 110; one end of the two first core rods 110 is respectively connected to both sides of the second intermediate hardware 130, and the second intermediate hardware 130 is used to hang the wire; the two end hardware 140 are respectively connected to the other end of the two first core rods 110, and the end hardware 140 is used to hang the wire; the first insulating layer 150 covers at least part of the outer circumference of the first core rod 110.

[0034] The two first core rods 110 are arranged at an angle, that is, the two first core rods 110 are arranged to tilt downward, and the axis extension lines of the two first core rods 110 intersect, so that the first cross arm 100 can form an inverted V-shaped structure for hanging three-phase conductors.

[0035] Combine Figure 3 and Figure 4 As shown, the first intermediate hardware 120 includes a first intermediate sleeve 121 and a first intermediate connecting portion 122. The first intermediate sleeve 121 is sleeved on the middle part of the first core rod 110. Specifically, the first intermediate sleeve 121 is sleeved on the outer periphery of the first core rod 110 and fixed to the first core rod 110 through a crimping process; the side of the first intermediate sleeve 121 facing the second cross arm 200 is defined as the bottom surface, and the first intermediate connecting portion 122 is arranged on the bottom surface of the first intermediate sleeve 121. The first intermediate connecting portion 122 is used to connect the second cross arm 200.

[0036] The first intermediate sleeve 121 is a hollow tubular structure, and the cross-sectional shape and size of the first intermediate sleeve 121 match the cross-sectional shape of the first core rod 110, so that the first intermediate sleeve 121 can be sleeved and fixed on the outer periphery of the first core rod 110, and the contact area between the two is increased, thereby ensuring the connection strength between the first intermediate sleeve 121 and the first core rod 110.

[0037] The first intermediate connecting portion 122 is a plate-like structure, which is vertically connected to the bottom surface of the first intermediate sleeve 121, and the first intermediate connecting portion 122 is located in the middle of the first intermediate sleeve 121, so that the force on the subsequent second cross arm 200 is more uniform after installation; the first intermediate connecting portion 122 is provided with a first connecting hole 1221, which is used to match and connect with the second cross arm 200 through fasteners such as bolts and screws, that is, there is no need to drill holes on the first intermediate sleeve 121 and the first core rod 110 for connection, thereby avoiding the drilling affecting the mechanical properties of the first core rod 110, and thus avoiding the occurrence of electrical safety hazards.

[0038] In one embodiment, if Figure 3 As shown, one first intermediate connecting part 122 can be provided, and the plate surface direction of the first intermediate connecting part 122 is provided along the axial direction of the first intermediate sleeve 121, and the through direction of the first connecting hole 1221 is perpendicular to the axial direction of the first intermediate sleeve 121, so that after the first intermediate hardware 120 is fixed on the first core rod 110, the plate surface direction of the first intermediate connecting part 122 and the length direction of the first cross arm 100 are located in the same vertical plane, which facilitates the assembly of the first cross arm 100 and the second cross arm 200.

[0039] In another embodiment, Figure 4As shown, two first intermediate connecting parts 122 can be provided, and the two first intermediate connecting parts 122 are spaced apart and arranged on the two side edges of the bottom surface of the first intermediate sleeve 121. In this way, the two first intermediate connecting parts 122 can be matched and connected with the second cross arm 200 by clamping and fixing, and the connection strength between the first cross arm 100 and the second cross arm 200 is further improved without affecting the mechanical properties of the first core rod 110.

[0040] It is understandable that the number and specific arrangement of the first intermediate connecting parts 122 may also adopt other forms, as long as they can be matched and connected with the second cross arm 200, and no specific limitation is made here.

[0041] Combine Figure 5-Figure 7 As shown, the second intermediate fitting 130 includes a top connecting portion 131 and two second intermediate sleeves 132 connected to both ends of the top connecting portion 131. The top connecting portion 131 is provided with a first hanging portion 1311, which is used to hang the wire via a wire clamp. The two second intermediate sleeves 132 are respectively sleeved onto one end of the two first core rods 110. The second intermediate sleeves 132 are tubular structures with one end closed. The closed end is connected to the top connecting portion 131, and the open end is sleeved onto one end of the first core rod 110. The cross-sectional shape and size of the second intermediate sleeves 132 match the cross-sectional shape of the first core rod 110.

[0042] In one embodiment, if Figure 5 As shown, the top connecting portion 131 and the two second intermediate sleeves 132 are integrally formed. The top connecting portion 131 is a plate-like structure, and the two second intermediate sleeves 132 are directly fixed to either side of the top connecting portion 131. The axes of the two second intermediate sleeves 132 are arranged at an angle. In this way, when the first core rod 110 is crimped into the second intermediate sleeves 132, the two first core rods 110 can directly form an inverted V-shaped structure, which is simple and efficient to install. A first hanging portion 1311 is provided in the middle of the bottom side of the top connecting portion 131.

[0043] Among them, the first hanging part 1311 can be a wire hanging plate, that is, the wire hanging plate extends outward from the middle part of the bottom side of the top connecting part 131 along the plate surface direction of the top connecting part 131. The wire hanging plate is provided with a hanging hole for installing the suspension wire clamp 12 through components such as a U-shaped hanging ring to hang the wire. When installing the wire, first fix the wire on the suspension wire clamp 12, then assemble the suspension wire clamp 12 with the U-shaped hanging ring, and then clamp the U-shaped hanging ring on both sides of the wire hanging plate, and align the mounting hole on the U-shaped hanging ring with the hanging hole, and then insert bolts, screws and other fasteners to hang the suspension wire clamp 12 on the hanging hole, so that the wire is firmly hung on the second intermediate hardware 130. The width of the wire hanging plate along the extension direction of the wire is smaller than the width of the top connecting part 131, which can reduce the weight of the top connecting part 131 while ensuring the hanging effect, thereby reducing costs.

[0044] Combine Figure 5 As shown, the first hanging portion 1311 can also be a hanging hole provided in the middle portion of the bottom side of the top connecting portion 131. The hanging wire clamp 12 is directly hung in the hanging hole to hang the wire. This can further reduce the weight of the top connecting portion 131 and reduce costs. The hanging wire clamp 12 adopts a wire clamp structure known in the art and is not specifically limited here.

[0045] In another embodiment, combined Figure 6 and Figure 7 As shown, in order to make the assembly of the first cross arm 100 more flexible, the top connecting portion 131 and the second intermediate sleeve 132 are detachably connected through the second intermediate connecting portion 133 .

[0046] The second intermediate connecting portion 133 is located at the end of the second intermediate sleeve 132 that is not connected to the first mandrel 110. The second intermediate connecting portion 133 is a plate structure with its plate surface oriented axially along the second intermediate sleeve 132. A plurality of second connecting holes 1331 are defined in the second intermediate connecting portion 1333. The second connecting holes 1331 extend perpendicularly to the plate surface of the second intermediate connecting portion 133 and are configured to mate with the top connecting portion 131. The width of the second intermediate connecting portion 133 along the wire extension direction is smaller than that of the second intermediate sleeve 132. This ensures connection strength while reducing the weight of the second intermediate hardware 130 and lowering costs.

[0047] The top connecting portion 131 includes two top connecting plates 1312, which clamp and secure the two second intermediate connecting portions 133, effectively ensuring the connection strength between them and thus the overall mechanical strength of the first crossarm 100. The two top connecting plates 1312 are provided with two corresponding sets of top connecting holes 13121, located on either side of each top connecting plate 1312. The top connecting holes 13121 extend perpendicularly to the surface of the top connecting plate 1312, and each set of top connecting holes 13121 matches the number and position of the plurality of second connecting holes 1331. On each top connecting plate 1312, the centers of each set of top connecting holes 13121 are located on the same straight line, and the line connecting the centers of the two sets of top connecting holes 13121 is arranged at an angle. Correspondingly, the centers of the plurality of second connecting holes 1331 are all located on the axis of the second intermediate sleeve 132. Thus, when the first core rod 110 is installed within the second intermediate sleeve 132, and when the top connecting plate 1312 is mated and connected to the two second intermediate sleeves 132 via the two second intermediate connecting portions 133, the two first core rods 110 can directly form an inverted V-shaped structure, making installation simple and efficient. During installation, the two top connecting plates 1312 are sandwiched between the two second intermediate connecting portions 133, and after the two sets of top connecting holes 13121 on each top connecting plate 1312 are aligned with the plurality of second connecting holes 1331 on the two second intermediate connecting portions 133, fasteners such as bolts and screws are inserted and tightened to connect the top connecting portion 131 to the second intermediate sleeve 132. In other embodiments, the top connection hole and the second connection hole may also be arranged in other ways, as long as the two can be matched and connected so that the first cross arm has an inverted V-shaped structure as a whole. No specific limitation is made here.

[0048] Furthermore, the top connecting plate 1312 is roughly triangular in structure, and two groups of top connecting holes 13121 are respectively arranged on the two side edges of the top connecting plate 1312, which can save unnecessary material waste, further reduce the weight of the top connecting part 131, and reduce costs.

[0049] At least one top connecting plate 1312 is provided with a first hanging portion 1311. The structure of the first hanging portion 1311 is as described above and will not be further described. In one embodiment, one first hanging portion 1311 is provided. When the first hanging portion 1311 adopts a wire hanging plate structure, a wire hanging plate can be directly extended from the middle portion of the bottom side of one of the top connecting plates 1312 to hang the suspension wire clamp 12. When the first hanging portion 1311 adopts a hanging hole structure, a hanging hole can be directly provided in the middle portion of the bottom side of one of the top connecting plates 1312 to hang the suspension wire clamp 12. A corresponding cavity is provided on the other top connecting plate 1312 to avoid interference with the first hanging portion 1311 hanging wire. In another embodiment, two first hanging portions 1311 are provided. Regardless of the structure of the first hanging portion 1311, the first hanging portions 1311 on the two top connecting plates 1312 are provided correspondingly. By cooperating with the two first hanging portions 1311 to hang the suspension wire clamp 12, the connection strength between the two can be further improved, thereby improving the overall mechanical strength of the first cross arm 100.

[0050] Furthermore, the first crossarm 100 can adopt a symmetrical inverted V-shaped structure, that is, the two second intermediate sleeves 132 are symmetrically and obliquely arranged on both sides of the top connecting portion 131, so that when the two first core rods 110 are respectively installed in the two second intermediate sleeves 132, the two first core rods 110 can be symmetrically and obliquely connected to both sides of the second intermediate hardware 130, so that the first crossarm 100 has a symmetrical structure as a whole, and the horizontal heights of the wires hung at both ends of the first crossarm 100 are equal, and the distances from the wires hung on the top of the first crossarm 100 in the vertical direction are equal, so that the force on the first crossarm 100 is more balanced and the structure is more stable.

[0051] It can be understood that the angle of the V-shaped opening of the first crossarm 100 can be specifically designed according to the insulation requirements of the composite crossarm 10 in different application scenarios. It only needs to adjust the connection angle between the top connecting part 131 and the two second intermediate sleeves 132 accordingly. This can be achieved by replacing different second intermediate hardware 130 or providing multiple groups of top connecting holes 13121 with different angles on the top connecting plate 1312, and no specific restrictions are imposed here.

[0052] Combine Figure 2 、 Figure 7 As shown, the end fitting 140 includes an end sleeve 141 and a second hanging portion 142 connected to each other. The end sleeve 141 is used to connect the other end of the first core rod 110 , and the second hanging portion 142 is used to hang the wire through the suspension clamp 12 .

[0053] The end sleeve 141 is sleeved around the outer periphery of the end of the first mandrel 110. The end sleeve 141 is a tubular structure with one end closed, and the cross-sectional shape and size of the end sleeve 141 match the cross-sectional shape of the first mandrel 110. The second hanging portion 142 is a plate structure comprising a vertically connected end plate and a wire hanging plate. The end plate covers the end of the end sleeve 141 not connected to the first mandrel 110. The wire hanging plate extends vertically outward from the side of the end plate away from the end sleeve 141. The wire hanging plate is provided with a mounting hole for mounting the suspension clamp 12 via a U-shaped hanging ring or other component to suspend the wire. When installing the wire, first fix the wire on the suspension clamp 12, then assemble the suspension clamp 12 with the U-shaped hanging ring, and then clamp the U-shaped hanging ring on both sides of the hanging plate of the end hardware 140, and align the mounting holes on the U-shaped hanging ring with the mounting holes on the hanging plate, and then insert bolts, screws and other fasteners to hang the suspension clamp 12 on the hanging plate, so that the wire is firmly hung on the end hardware 140. The width of the hanging plate along the extension direction of the wire is smaller than the width of the end sleeve 141, which can reduce the weight of the end hardware 140 while ensuring the hanging effect, thereby reducing costs. The suspension clamp 12 adopts the wire clamp structure in the prior art and is not specifically limited here.

[0054] In other embodiments, the end fittings may also adopt existing fitting structures, as long as they can be used to hang wires, and no specific limitation is made here.

[0055] like Figure 8 As shown, the second cross arm 200 includes a second core rod 210 (marked in the figure for schematic purposes only), a first hardware fitting 220, a second hardware fitting 230 and a second insulating layer 240. The first hardware fitting 220 connects one end of the second core rod 210 and the middle part of the first cross arm 100; the second hardware fitting 230 connects the other end of the second core rod 210 and the connecting hardware fitting 300; the second insulating layer 240 covers at least part of the outer circumference of the second core rod 210.

[0056] The first hardware 220 includes a first sleeve 221 and a first connecting portion 222. One end of the first sleeve 221 is connected to one end of the second core rod 210. For example, the first sleeve 221 can be connected to the second core rod 210 through a crimping process. The first connecting portion 222 is used to connect to the middle portion of the first crossarm 100. The first connecting portion 222 is a plate-like structure and is provided with a third connecting hole 2221, which is configured to mate with the first connecting hole 1221 on the first intermediate connecting portion 122 to achieve assembly of the first crossarm 100 and the second crossarm 200. During installation, the first connecting portion 222 is placed closely against the first intermediate connecting portion 122, and the third connecting hole 2221 is aligned with the first connecting hole 1221. Fasteners such as bolts and screws are then inserted and tightened to connect the first connecting portion 222 and the first intermediate connecting portion 122, thereby connecting one end of the second crossarm 200 to the middle portion of the first crossarm 100.

[0057] The second hardware 230 includes a connected second sleeve 231 and a second connecting portion 232. One end of the second sleeve 231 is connected to the other end of the second core rod 210. For example, the second sleeve 231 can be connected to the second core rod 210 by a crimping process; the second connecting portion 232 is used to connect to the connecting hardware 300, and then connect the second crossarm 200 and the pole 20. The second connecting portion 232 includes a first connecting plate 2321 and two second connecting plates 2322. The first connecting plate 2321 covers the end of the second sleeve 231 that is not connected to the second core rod 210. The two second connecting plates 2322 are respectively connected to the two ends of the first connecting plate 2321 vertically, and the two second connecting plates 2322 extend in the same direction from the two ends of the first connecting plate 2321 in the direction away from the second sleeve 231, so that the second connecting portion 232 has a "匚"-shaped structure. Two groups of fourth connecting holes 23221 are provided on each second connecting plate 2322. The fourth connecting holes 23221 on the two second connecting plates 2322 are correspondingly arranged for matching and connecting with the connecting hardware 300 through fasteners such as bolts and screws. That is, there is no need to drill holes on the second sleeve 231 and the second core rod 210 for connection, thereby avoiding the impact of drilling on the mechanical properties of the second core rod 210, thereby avoiding the occurrence of electrical safety hazards.

[0058] like Figure 9 As shown, the connecting fitting 300 includes a connected pole connecting portion 310 and a crossarm connecting portion 320. The pole connecting portion 310 is connected to the pole 20, and the crossarm connecting portion 320 is connected to the composite crossarm 10, specifically connected to the other end of the second crossarm 200, and makes the angle between the second crossarm 200 and the pole 20 adjustable.

[0059] In this embodiment, the pole 20 has a square cross-section, and the pole connection portion 310 is configured as a corresponding plate-shaped structure. This increases the contact area between the pole connection portion 310 and the pole 20, ensuring a secure connection between the two. The pole connection portion 310 includes a first plate 311 having a first pole connection hole 3111 defined therein for securing the first plate 311 to the pole 20 via fasteners such as bolts and screws.

[0060] The crossarm connecting portion 320 includes two second plates 321, which are roughly rectangular plates. One end of the two second plates 321 is respectively perpendicularly connected to the two ends of the first plate 311, and the two second plates 321 extend in the same direction from the two ends of the first plate 311 in the direction away from the first plate 311. The distance between the mutually approaching plate surfaces of the two second plates 321 is slightly larger than the distance between the mutually distant plate surfaces of the two second connecting plates 2322 of the second connecting portion 232 of the second hardware 230. On the one hand, the second connecting portion 232 can be moved between the two second plates 321, which is convenient for adjusting the angle between the second crossarm 200 and the pole 20; on the other hand, the two second plates 321 can be clamped and fixed with the two second connecting plates 2322 by fasteners such as bolts and screws, ensuring a reliable connection between the second crossarm 200 and the pole 20. The second plate 321 is provided with a fixing hole 3211 and an adjustment hole 3212. The fixing hole 3211 is a circular through hole, and the adjustment hole 3212 is an arc-shaped hole. The arc of the adjustment hole 3212 is concentric with the fixing hole 3211. The two are used to enable the second crossarm 200 to rotate around the fixing hole 3211, which is convenient for adjusting the angle between the second crossarm 200 and the pole 20 and fixing the second crossarm 200 to the connecting hardware 300. The fixing holes 3211 and the adjustment holes 3212 on each second plate 321 are respectively arranged to correspond to the two groups of fourth connecting holes 23221 on each second connecting plate 2322, so as to adjust the angle between the second crossarm 200 and the pole 20 and fix the second crossarm 200 to the connecting hardware 300, so that the angle between the second crossarm 200 and the pole 20 can be adjusted according to design requirements, and the installation is flexible and the connection is reliable; and the independent hardware structure makes it suitable for installing composite crossarms 10 of different length specifications, and has a wider range of applications.

[0061] In one embodiment, the length of the first plate 311 along the length direction of the pole 20 is smaller than the length of the second plate 321 on the side close to the pole 20, and the first plate 311 is located at the upper part of the second plate 321, and the fixing hole 3211 and the adjustment hole 3212 are located in the middle part of the second plate 321, that is, the fixing hole 3211 and the adjustment hole 3212 are located below the first pole connection hole 3111, which can prevent the fasteners between the pole connection part 310 and the pole 20 from affecting the rotation adjustment of the angle between the second cross arm 200 and the pole 20, and at the same time can reduce the material consumption of the connecting hardware 300 and reduce the manufacturing cost.

[0062] When installing the connecting fitting 300, first place the first plate 311 of the pole connecting part 310 close to the pole 20, and align the first pole connecting hole 3111 on the first plate 311 with the installation hole on the pole 20, then insert bolts, screws and other fasteners and tighten them to fix the connecting fitting 300 on the pole 20. When installing the second crossarm 200, the second connecting portion 232 is placed between the two second plates 321, and the fixing hole 3211, the adjusting hole 3212 and the fourth connecting hole 23221 of the second connecting portion 232 are aligned, and bolts, screws and other fasteners are inserted into the corresponding fixing hole 3211 and the fourth connecting hole 23221, the adjusting hole 3212 and the fourth connecting hole 23221 for pre-fixing, that is, the approximate position of the two is limited under the premise of not affecting the rotation of the second connecting portion 232 in the crossarm connecting portion 320. At this time, the second crossarm 200 can rotate around the fixing hole 3211 as the center, that is, when the second crossarm 200 rotates, the fasteners in the fixing hole 3211 remain in position unchanged, and the fasteners in the adjusting hole 3212 slide and adjust in the adjusting hole 3212 around the fixing hole 3211 as the center. After the angle between the second crossarm 200 and the pole 20 is adjusted to the preset angle, the above fasteners are tightened to fix the second crossarm 200 to the pole 20. In other embodiments, after the connecting hardware is fixed on the pole, fasteners can be inserted into the corresponding fixing holes and the fourth connecting hole for pre-fixing. When the second cross arm is adjusted into place, the fasteners are tightened, and fasteners are inserted into the corresponding adjustment holes and the fourth connecting hole and tightened to fix the second cross arm to the pole. No specific restrictions are made here.

[0063] Furthermore, in order to make the connection between the connecting fitting 300 and the pole 20 more stable, the pole connecting part 310 also includes a third plate 312, and the two ends of the third plate 312 are respectively connected to the other ends of the two second plates 321 that are not connected to the first plate 311, so that the first plate 311 and the third plate 312 are respectively located on both sides of the second plate 321, and the length of the third plate 312 along the length direction of the pole 20 is less than the length of the second plate 321. The third plate 312 is located at the lower part of the second plate 321, and a second pole connecting hole 3121 is provided on the third plate 312, which is used to further fix the connecting fitting 300 to the pole 20 by fasteners such as bolts and screws. The provision of the third plate 312, on the one hand, enables the upper and lower ends of the connecting hardware 300 to be fastened to the pole 20 simultaneously through the first plate 311 and the third plate 312, so that the force between the two is more uniform and the connection is more reliable; on the other hand, provision of the third plate 312 at the end of the second plate 321 away from the pole 20 can avoid interference between the third plate 312 and the fasteners on the second plate 321 during installation.

[0064] In another embodiment, Figure 10As shown, the length of the first plate 311 along the length direction of the pole 20 is equal to the length of the second plate 321 on the side close to the pole 20. This can increase the contact area between the pole connecting portion 310 and the pole 20, making the connection between the two more reliable. In addition, the second plate 321 can also be a roughly right-angled trapezoidal plate, that is, the lower edge of the second plate 321 is set horizontally, and the upper edge of the second plate 321 is set downwardly from the upper end of the first plate 311 toward the upper end of the third plate 312. This can reduce the material usage and manufacturing costs while ensuring the connection strength of the connecting hardware 300. It can be understood that the specific shape of the upper edge of the second plate 321 can be adjusted according to the position of the fixing hole 3211 and the adjustment hole 3212, as long as it does not affect the installation of the second cross arm 200, and no specific restrictions are made here.

[0065] It can be understood that when the length of the first plate 311 is smaller than the length of the second plate 321 on the side close to the pole 20 and the first plate 311 is located on the upper part of the second plate 321, the lower part of the connecting hardware 300 close to the pole 20 is a hollow structure. During installation, the connecting hardware 300 is first connected to the pole 20 through the first plate 311, and then the second cross arm 200 is installed and adjusted into place, and then bolts, screws and other fasteners are inserted into the second pole connecting hole 3121 on the third plate 312 and the installation hole on the pole 20 and tightened to further fix the connecting hardware 300 on the pole 20. When the length of the first plate 311 is equal to the length of the second plate 321 on the side close to the pole 20, the lower part of the first plate 311 is provided with a third pole connection hole (not shown) corresponding to the second pole connection hole 3121. During installation, the third plate 312 can be connected to the pole 20 by inserting bolts, screws and other fasteners through the second pole connection hole 3121, the third pole connection hole and the installation hole on the pole 20. The other steps are as described above.

[0066] Furthermore, both second plates 321 are provided with flanges 3213, which extend vertically from the side of the second plate 321 close to the pole 20 in a direction away from the first plate 311, and both flanges 3213 are located in the same plane as the first plate 311. The provision of the flanges 3213 can increase the contact area between the connecting hardware 300 and the pole 20, making the force between the two more uniform and the connection more reliable.

[0067] In other embodiments, the connecting hardware 300 can also be installed with other forms of composite crossarms and is not limited to the above-mentioned structure. It can be applicable to construction scenarios where it is necessary to adjust the angle between the composite crossarm and the pole during installation. It has flexible installation and reliable connection. Moreover, the independent hardware structure makes it suitable for installing composite crossarms of different lengths and specifications, and has a wider range of applications.

[0068] In one embodiment, the first core rod 110 and the second core rod 210 are both made of composite materials, for example, glass fiber or aramid fiber impregnated with epoxy resin and then pultruded. Compared with the metal material of traditional crossarms, composite materials are more corrosion-resistant and low-cost, and can achieve significant weight reduction, making the composite crossarm 10 easy to install.

[0069] In one embodiment, the first core rod 110 has a square cross-section, and the second core rod 210 has a circular cross-section. This configuration ensures that the composite cross-arm 10 has good overall structural strength, a simple structure, and low cost. In other embodiments, the cross-sections of the first and second core rods can also be triangular, T-shaped, L-shaped, or other shapes, as long as the structure of each core rod meets the strength requirements. The core rods can have different or identical structures, for example, the first core rod can have a triangular cross-section and the second core rod can have a square cross-section, or the cross-sections of the core rods can all be square or circular, etc., without specific limitation.

[0070] In one embodiment, the cross-sectional shape and size of the hardware sleeve on each core rod match the cross-sectional shape of the corresponding core rod, that is, the cross-sectional shape and size of the first intermediate sleeve 121, the second intermediate sleeve 132 and the end sleeve 141 match the cross-sectional shape and size of the first core rod 110, and the cross-sectional shape and size of the first sleeve 221 and the second sleeve 231 match the cross-sectional shape and size of the second core rod 210, so as to fix each sleeve on the corresponding core rod and increase the contact area between each sleeve and the corresponding core rod, thereby ensuring the connection strength between each hardware and the corresponding core rod.

[0071] In one embodiment, each hardware is formed into a separate hardware component and then connected together by welding, which provides reliable connection and simple manufacturing. In other embodiments, each hardware can also be integrally formed by casting or other methods, as long as the connection strength between the components can be guaranteed. No specific restrictions are imposed here.

[0072] In one embodiment, the first insulating layer 150 and the second insulating layer 240 both include a sheath. The sheath of the first insulating layer 150 is sealedly connected to the first intermediate fitting 120 in the middle of the first core rod 110, the second intermediate fitting 130, and the end fittings 140 at both ends. The sheath of the second insulating layer 240 is sealedly connected to the first fittings 220 and the second fittings 230 at both ends of the second core rod 210, which can effectively prevent external water vapor from invading and damaging the first core rod 110 and the second core rod 210, thereby avoiding affecting the service life of the composite crossarm 10.

[0073] Furthermore, the first insulating layer 150 and the second insulating layer 240 may also include umbrella skirts spaced apart on the sheath. The setting of the umbrella skirts can increase the creepage distance of the outer surfaces of the first crossarm 100 and the second crossarm 200, so that the composite crossarm 10 has a sufficient dry arc distance. In addition, the setting of the umbrella skirts can also prevent birds from nesting, thereby improving the overall electrical safety of the composite crossarm 10.

[0074] In one embodiment, both the first insulating layer 150 and the second insulating layer 240 are high-temperature vulcanized silicone rubber. The silicone rubber material is integrally vacuum-injected onto the outer circumference of the first core rod 110 and the second core rod 210 to form a high-temperature vulcanized silicone rubber insulation layer. High-temperature vulcanized silicone rubber exhibits excellent aging resistance and hydrophobic migration, reducing the probability of pollution flashover and rain flashover, thereby improving the electrical safety of the composite crossarm 10. In other embodiments, the first and second insulating layers may also be molded or pre-formed and then attached to the outer circumference of the corresponding core rods, without specific limitation herein.

[0075] It can be understood that the overall length of the composite crossarm 10 of the present application, the length of the first crossarm 100 and the second crossarm 200, etc. can be adjusted accordingly according to needs; and the installation order of the composite crossarm 10 can also be adjusted accordingly according to needs, that is, the two second crossarms 200 can be fixed to the pole 20 through the connecting hardware 300 first, and then the first crossarm 100 can be fixed, or the first crossarm 100, the two second crossarms 200, and the connecting hardware 300 can be assembled first, and then installed on the pole 20 for adjustment and fixation. No specific restrictions are made here.

[0076] The technical content and features of this application have been disclosed above. However, it is understood that, based on the creative ideas of this application, those skilled in the art may make various changes and improvements to the above-mentioned structures and materials, including combinations of the technical features disclosed or claimed herein, and obviously including other combinations of these features. Such variations and / or combinations fall within the technical field involved in this application and fall within the scope of protection of the claims of this application.

Claims

1. A connecting fitting for connecting a composite crossarm to an electric pole, characterized in that: The connecting fitting comprises a connected pole connecting portion and a cross-arm connecting portion, wherein the pole connecting portion is connected to the pole, and the cross-arm connecting portion is connected to the composite cross-arm, and the angle between the composite cross-arm and the pole is adjustable.

2. The connection fitting according to claim 1, wherein: The pole connecting portion includes a first plate, and a first pole connecting hole is provided on the first plate for abutting and fixing the pole.

3. The connection fitting according to claim 2, wherein: The cross-arm connecting portion includes two second plates, which are respectively connected perpendicularly to the two ends of the first plate, and the two second plates extend in the same direction from the two ends of the first plate away from the first plate. The second plates are provided with fixing holes and adjustment holes, and the fixing holes and the adjustment holes are used to make the angle between the composite cross-arm and the pole adjustable.

4. The connection fitting according to claim 3, wherein: The fixing hole is a circular through hole, and the adjusting hole is an arc-shaped hole. The arc of the adjusting hole is concentrically arranged with the fixing hole.

5. The connection fitting according to claim 3, wherein: The pole connecting part also includes a third plate, which is provided with a second pole connecting hole for matching and connecting with the pole, and the two ends of the third plate are respectively connected to the other ends of the two second plates that are not connected to the first plate.

6. The connection fitting according to claim 5, wherein: The length of the third plate along the length direction of the pole is smaller than that of the second plate, and the third plate is located below the second plate.

7. The connection fitting according to claim 3, wherein: Both of the second plates are provided with flanges, which extend vertically from a side of the second plate close to the pole toward a direction away from the first plate, and the two flanges are located in the same plane as the first plate.

8. A composite cross arm, characterized in that: include: A first cross arm, two second cross arms, and two connecting fittings according to any one of claims 1 to 7, wherein both ends of the first cross arm are used for hanging conductors; The first fittings of the two second cross arms are respectively connected to the middle part of the first cross arm, and the second fittings of the two second cross arms are respectively connected to the two sides of the pole through the two connecting fittings. The length direction of the second cross arm is inclined, and the second cross arm is arranged below the first cross arm and is located in the same vertical plane as the first cross arm.

9. The composite cross arm according to claim 8, characterized in that: The second hardware includes a connected second sleeve and a second connecting part, the second connecting part includes a first connecting plate and two second connecting plates, the first connecting plate covers one end of the second sleeve, the two second connecting plates are respectively vertically connected to the two ends of the first connecting plate, and the two second connecting plates extend in the same direction from the two ends of the first connecting plate away from the second sleeve.

10. The composite cross arm according to claim 9, characterized in that: Two groups of connection holes are correspondingly provided on the two second connection plates for matching and connecting with the connection hardware, so that the angle between the second cross arm and the pole can be adjusted.

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