Insulating protective cover

Abstract

The utility model discloses an insulating protective cover which is used for covering a metal structure at the top of a power transmission pole, the power transmission pole comprises a composite cross arm and an electric pole, the composite cross arm is fixed on the electric pole and comprises a first cross arm, two second cross arms and two connecting fittings, and the insulating protective cover comprises a connecting fitting protective cover and an electric pole protective cover. The connecting fitting protective cover is used for covering a connecting fitting, the electric pole protective cover is used for covering the top of an electric pole, and a main body structure of the insulating protective cover is a cuboid structure with an opening in the bottom. The insulating protective cover can cover a metal structure at the top of the power transmission pole to enhance the insulating effect of the top of the power transmission pole, accidents such as tripping caused by electric shock birds can be effectively prevented, the safety is higher, the operation and maintenance cost is lower, and the biological diversity is protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overhead transmission lines, in particular to an insulation protective cover. BACKGROUND

[0002] The cross arm is a component installed on the electric pole in the overhead line, which mainly supports the conductor. The traditional transmission pole adopts iron cross arm, and the conductor is hung by installing insulators on the iron cross arm. When the conductor adopts bare conductor, birds taking off or landing from the transmission pole may simultaneously contact any two conductors or any one conductor and the iron cross arm, forming a closed circuit to cause electric shock, which will directly affect the normal operation of the power infrastructure, cause tripping accidents, and also cause bird death and reduce biodiversity. CONTENT OF THE UTILITY MODEL

[0003] In view of the defects of the prior art, the purpose of the present application is to provide an insulation protective cover which can cover the metal structure at the top of the transmission pole to strengthen the insulation effect of the top of the electric pole, effectively prevent tripping accidents caused by electric shock of birds, and has higher safety and lower operation and maintenance cost, and protects biodiversity.

[0004] To achieve the above purpose, the technical scheme adopted by the present application is: an insulation protective cover is used to cover the metal structure at the top of the transmission pole, the transmission pole comprises a composite cross arm and a pole, the composite cross arm is fixed on the pole, the composite cross arm comprises a first cross arm, two second cross arms and two connecting fittings, the insulation protective cover comprises a connecting fitting protective cover and a pole protective cover, the connecting fitting protective cover is used to cover the connecting fitting, the pole protective cover is used to cover the top of the pole, and the main body structure of the insulation protective cover is a long rectangular body structure with an open bottom.

[0005] Among them, the main body structure of the connecting fitting protective cover is a long rectangular body structure with an open bottom, and the size of the open bottom is matched with the horizontal cross-sectional size of the connecting fitting.

[0006] Among them, the main body structure of the pole protective cover is a long rectangular body structure with an open bottom, the size of the long rectangular body structure is matched with the size of the top of the pole, and the size of the open bottom is matched with the size of the horizontal cross section of the pole.

[0007] Among them, a plurality of cavities are arranged on the insulation protective cover, which are used to pass the second cross arms and fasteners.

[0008] Among them, a plurality of cavities are arranged on the connecting fitting protective cover, one cavity is arranged corresponding to the second cross arm, and the remaining cavities are arranged corresponding to the mounting positions of the composite cross arm.

[0009] Among them, a plurality of cavities are arranged on the pole protective cover, which are arranged corresponding to the mounting holes on the pole respectively.

[0010] The side part openings are arranged on the sides of the connecting hardware protection cover and the electric pole protection cover which are close to each other, and the size of the side part openings matches the size of the vertical section of the connecting hardware with the largest area.

[0011] The top of the connecting hardware protection cover and the electric pole protection cover is a pointed top structure, and the pointed top is arranged upwards.

[0012] The insulation protection cover further comprises a fastener protection cover for covering the fastener which needs to be arranged during the installation of the connecting hardware and the electric pole.

[0013] The insulation protection cover is made of silicone rubber.

[0014] The insulation protection cover is of a split structure.

[0015] The insulation protection cover of the present application can cover the metal structure on the top of the electric pole to enhance the insulation effect of the top of the electric pole, effectively prevent accidents such as tripping caused by electric shock of birds, and has higher safety and lower operation and maintenance cost, while reducing the probability of bird electrocution and protecting biodiversity. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of a power transmission pole 1000 of an embodiment of the present application;

[0017] Figure 2 is a structural schematic diagram of a first cross arm 100 of an embodiment of the present application;

[0018] Figure 3 is a partial structural enlarged schematic diagram of the first intermediate hardware 120 fixed on the first core rod 110 of an embodiment of the present application;

[0019] Figure 4 is an enlarged schematic diagram of position A in FIG. 4; Figure 2

[0020] Figure 5 is a hanging wire structural schematic diagram of a second intermediate hardware 130 of an embodiment of the present application;

[0021] Figure 6 is an enlarged schematic diagram of position B in FIG. 5; Figure 2

[0022] is a partial structural schematic diagram of the first cross arm 100 of an embodiment of the present application; Figure 7

[0023] Figure 8 is a hanging wire structural schematic diagram of an end hardware 140 of an embodiment of the present application;

[0024] Figure 9 ​​is a structural schematic view of an end fitting 140 according to another embodiment of the present application;

[0025] Figure 10 is a structural schematic view of a second cross arm 200 according to an embodiment of the present application;

[0026] Figure 11 is a structural schematic view of a connecting fitting 300 according to an embodiment of the present application;

[0027] Figure 12 is a structural schematic view of a connecting fitting 300 according to another embodiment of the present application;

[0028] Figure 13 is a structural schematic view of a power transmission pole 2000 according to another embodiment of the present application;

[0029] Figure 14 is a partial structural schematic view of a power transmission pole 2000 according to still another embodiment of the present application;

[0030] Figure 15 is a structural schematic view of a power transmission pole 2000 according to another embodiment of the present application;

[0031] Figure 16 is a partial structural schematic view of a power transmission pole 1000 according to still another embodiment of the present application. DETAILED DESCRIPTION

[0032] In accordance with the requirements of the present application, specific embodiments thereof will now be disclosed herein. It should be understood, however, that the embodiments disclosed herein are merely typical examples of the present application and can be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as being representative of the embodiments which include the various features disclosed herein and which can be variously combined to form differing embodiments of the present application, including employing features disclosed herein in combination with features not expressly disclosed herein.

[0033] The term "connected" as used herein, unless otherwise explicitly specified or limited, is to be construed in a broad sense and can mean direct connection or indirect connection via an intermediate medium. In the description of the present application, it should be understood that the orientation or position relationship indicated by "upper", "lower", "end", "one end" and the like is based on the orientation or position relationship shown in the drawings and is merely for the convenience of describing the present application and simplifying the description, and therefore should not be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0034] In an application scenario, as shown in FIG. 1, a power transmission pole 1000 is arranged on a tower 10 of a power transmission line 1. The power transmission pole 1000 is connected to a cross arm 200 arranged on the tower 10 via a connecting fitting 300. Figure 1As shown, the application provides a power transmission pole 1000, the power transmission pole 1000 is a straight pole, the straight pole comprises a composite cross arm 10 and a pole 20, and the composite cross arm 10 is fixed on the pole 20. In the power system, the straight pole refers to a pole tower used for supporting the conductor in the middle of the line.

[0035] The composite cross arm 10 comprises a first cross arm 100, two second cross arms 200 and two connecting fittings 300, the first cross arm 100 is in an inverted V-shaped structure, and the top and both ends of the first cross arm 100 are used for hanging the conductor; the two second cross arms 200 are connected to the opposite sides of the pole 20 and form a V-shaped structure, one end of each of the two second cross arms 200 is connected to the middle of the first cross arm 100, and the other end of each of the two second cross arms 200 is connected to the two sides of the pole 20 through the two connecting fittings 300, and the length direction of the second cross arm 200 is arranged obliquely, the second cross arm 200 is arranged below the first cross arm 100 and is in the same vertical plane as the first cross arm 100.

[0036] The power transmission pole 1000 of the application adopts the composite cross arm 10 to hang the conductor, the whole composite cross arm 10 adopts a full insulation structure, and the hanging height of the conductor is raised as a whole through the second cross arm 200, thereby prolonging the insulation distance between the conductor at the high-voltage end of the power transmission pole 1000 and the top of the pole 20 at the low-voltage end, so that no matter where the bird takes off, stands or lands on the power transmission pole 1000, it will not form a power return circuit, effectively preventing accidents such as tripping caused by electric shock of birds, and the safety is higher, the operation and maintenance cost is lower, and at the same time, the probability of birds landing on the power transmission pole 1000 and being electrocuted to death can be effectively reduced, and the biodiversity is protected. In the traditional scheme, the straight pole supports the conductor by arranging a suspension insulator on the iron cross arm. Compared with the traditional iron cross arm, the composite cross arm 10 is directly connected to the conductor in the application, which can cancel the suspension insulator structure, make the cross arm structure simpler, installation more convenient, and not easy to rust, and has a longer service life.

[0037] It should be noted that the middle part written in the application refers to the part between the two ends, not the strictly central part.

[0038] Combined Figure 2As 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In one embodiment, ifFigure 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.

[0044] In another embodiment, Figure 4 As 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.

[0045] It is understandable that the number and specific configuration of the first intermediate connecting portions 122 may also be in other forms, as long as they can be matched and connected with the second cross arm 200 , and no specific limitation is imposed herein.

[0046] Combine Figures 5-7 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.

[0047] 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.

[0048] The first hanging part 1311 can be a hanging plate. The hanging plate extends outward from the middle of the bottom side of the top connecting part 131 along the plate surface direction of the top connecting part 131, and is provided with a hanging hole for installing the suspension wire clamp 12 through a U-shaped hanging ring and the like to hang the wire. When installing the wire, the wire is first fixed on the suspension wire clamp 12, then the suspension wire clamp 12 is assembled with the U-shaped hanging ring, and then the U-shaped hanging ring is clamped on both sides of the hanging plate, and the mounting hole on the U-shaped hanging ring is aligned with the hanging hole, and then a fastener such as a bolt or a screw is passed through to hang the suspension wire clamp 12 on the hanging hole, so as to stably hang the wire on the second intermediate fitting 130. The width of the hanging plate in the wire extension direction is less than the width of the top connecting part 131, which can reduce the weight of the top connecting part 131 while ensuring the wire hanging effect, thereby reducing the cost.

[0049] In combination Figure 5 As shown, the first hanging part 1311 can also be a hanging hole provided on the middle of the bottom side of the top connecting part 131, and the suspension wire clamp 12 is directly hung in the hanging hole to hang the wire, which can further reduce the weight of the top connecting part 131 and reduce the cost. The suspension wire clamp 12 adopts the wire clamp structure in the prior art, which is not limited in detail here.

[0050] In another embodiment, in combination Figure 6 and Figure 7 In order to make the assembly of the first cross arm 100 more flexible, the top connecting part 131 and the second intermediate sleeve 132 are detachably connected through the second intermediate connecting part 133.

[0051] The second intermediate connecting part 133 is provided on the end of the second intermediate sleeve 132 not connected with the first core rod 110. The second intermediate connecting part 133 is a plate structure, and the plate surface thereof is arranged along the axial direction of the second intermediate sleeve 132. A plurality of second connecting holes 1331 are arranged on the second intermediate connecting part 133, and the through direction of the second connecting holes 1331 is perpendicular to the plate surface direction of the second intermediate connecting part 133, and is used for matched connection with the top connecting part 131. The width of the second intermediate connecting part 133 in the wire extension direction is less than the width of the second intermediate sleeve 132, which can reduce the weight of the second intermediate fitting 130 while ensuring the connection strength, thereby reducing the cost.

[0052] The top connecting part 131 includes two top connecting plates 1312 clamping and fixing the two second intermediate connecting parts 133, which can effectively ensure the connecting strength between the two, so as to ensure the overall mechanical strength of the first cross arm 100. The two top connecting plates 1312 are correspondingly provided with two groups of top connecting holes 13121, which are respectively located on the two sides of the top connecting plate 1312, and the through direction of the top connecting hole 13121 is perpendicular to the plate surface of the top connecting plate 1312. Each group of top connecting holes 13121 matches the number and position of the second connecting hole 1331. On each top connecting plate 1312, the centers of each group of top connecting holes 13121 are located on the same straight line, and the center line of the two groups of top connecting holes 13121 is arranged at an angle. Correspondingly, the centers of the second connecting hole 1331 are located on the axis of the second intermediate sleeve 132. In this way, when the first core rod 110 is installed in the second intermediate sleeve 132, and when the top connecting plate 1312 is matched and connected with the two second intermediate sleeves 132 through the two second intermediate connecting parts 133, the two first core rods 110 can directly form an inverted V-shaped structure, which is simple and efficient in installation operation. When installing, the two top connecting plates 1312 are clamped on the two sides of the two second intermediate connecting parts 133, and the two groups of top connecting holes 13121 on each top connecting plate 1312 are matched and aligned with the second connecting hole 1331 on the two second intermediate connecting parts 133, respectively. Fasteners such as bolts and screws are inserted and fastened to connect the top connecting part 131 with the second intermediate sleeve 132. In other embodiments, the top connecting hole and the second connecting hole can also be arranged in other ways, as long as they can be matched and connected to make the first cross arm into an inverted V-shaped structure, which is not limited here.

[0053] Further, the top connecting plate 1312 is roughly triangular in structure, and the two groups of top connecting holes 13121 are arranged on the two side edges of the top connecting plate 1312, so as to save unnecessary material waste, further reduce the weight of the top connecting part 131, and reduce the cost.

[0054] The first hanging part 1311 is arranged on at least one of the top connecting plates 1312. The structure of the first hanging part 1311 is as described above and will not be repeated here. In an embodiment, the first hanging part 1311 is arranged in one. When the first hanging part 1311 adopts the hanging wire plate structure, a hanging wire plate can be arranged in the middle of the bottom side of one of the top connecting plates 1312 to hang the wire clamp 12; when the first hanging part 1311 adopts the hanging hole structure, a hanging hole can be arranged in the middle of the bottom side of one of the top connecting plates 1312 to hang the wire clamp 12, and a cavity is correspondingly arranged on the other top connecting plate 1312 to avoid interference with the first hanging part 1311 hanging the wire. In another embodiment, the first hanging part 1311 is arranged in two. No matter what structure the first hanging part 1311 adopts, the first hanging parts 1311 on the two top connecting plates 1312 are correspondingly arranged, and the wire clamp 12 is hung through the cooperation of the two first hanging parts 1311, which can further improve the connection strength between the two and in turn improve the overall mechanical strength of the first cross arm 100.

[0055] Further, the first cross arm 100 can adopt a symmetrical inverted V-shaped structure, that is, the two second intermediate sleeves 132 are symmetrically and obliquely arranged on the two sides of the top connecting part 131, so that when the two first core rods 110 are respectively arranged in the two second intermediate sleeves 132, the two first core rods 110 can be symmetrically and obliquely connected on the two sides of the second intermediate fitting 130, so that the first cross arm 100 as a whole has a symmetrical structure, and in turn the horizontal height of the wires hung on the two ends of the first cross arm 100 is equal, and the distance along the vertical direction of the wires hung on the top of the first cross arm 100 is equal, so that the first cross arm 100 is more balanced in stress and more stable in structure.

[0056] It can be understood that the size of the included angle of the V-shaped opening of the first cross arm 100 can be designed according to the insulation requirements of the composite cross arm 10 in different application scenarios, and the connection angle between the top connecting part 131 and the two second intermediate sleeves 132 can be correspondingly adjusted. This can be achieved by replacing different second intermediate fittings 130 or arranging multiple groups of top connecting holes 13121 with different angles on the top connecting plate 1312, and the like, which will not be specifically limited here.

[0057] In combination with FIGS. 1-3, Figure 2 , Figures 7-9 As shown in FIG. 4, the end fitting 140 includes a connected end sleeve 141 and a second hanging part 142. The end sleeve 141 is used to connect the other end of the first core rod 110, and the second hanging part 142 is used to directly hang the wire or to hang the wire through the wire clamp.

[0058] In an embodiment, as shown in FIG. 4, Figure 8As shown, the end fitting 140 is a gland type fitting, and can directly hang the wire. The end fitting 140 includes a connected end sleeve 141 and a second hanging part 142, the end sleeve 141 is sleeved on the outer periphery of the end of the first core rod 110, the end sleeve 141 is a closed pipe structure at one end, and the cross-sectional shape and size of the end sleeve 141 match the cross section of the first core rod 110; the second hanging part 142 includes a base 1421, a gland 1422 and two ear pieces 1423. The base 1421 covers the end of the end sleeve 141 which is not connected to the first core rod 110, the base 1421 is provided with a first slot 14211, which is an arc-shaped slot for placing the wire, and the base 1421 is provided with two mounting holes, which are respectively located on both sides of the first slot 14211 and used for matching connection with the gland 1422; the bottom of the gland 1422 is provided with a second slot 14221, which is also an arc-shaped slot for assisting in fixing the wire, and the setting direction of the first slot 14211 and the second slot 14221 is perpendicular to the axial direction of the first core rod 110, and the two cooperate to facilitate the stable hanging of the wire; the two ear pieces 1423 are respectively connected to the two sides of the gland 1422, and the two ear pieces 1423 are located on both sides of the axial direction of the second slot 14221, the ear piece 1423 is provided with a mounting hole, and the mounting holes on the two ear pieces 1423 are correspondingly provided on the mounting holes on the base 1421, so that the ear piece 1423 can be fastened and connected with the base 1421 by bolts, screws and other fasteners, and then the gland 1422 can be tightly fixed to the wire. When installing the wire, the wire is placed in the first slot 14211, the gland 1422 is placed above the wire, the second slot 14221 is matched with the top of the wire and tightly presses the wire, and then the fastener is correspondingly threaded through the mounting holes on the ear piece 1423 and the base 1421 and is tightly fixed, so that the gland 1422 is fixedly connected with the base 1421, thereby stably hanging the wire on the end fitting 140.

[0059] Further, the bottom of the second hanging part 142 is provided with a lifting part 143, the lifting part 143 is provided with a lifting hole 1431, which is used to meet the lifting requirement, that is, to lift and install the first cross arm 100 by ropes and other tools, and the width of the lifting part 143 along the wire extension direction is less than the width of the end sleeve 141, which can reduce the weight of the end fitting 140 while ensuring the wire hanging effect, and reduce the cost.

[0060] In another embodiment, as Figure 9As shown, the end fitting 140 is a groove type clamp fitting, and the conductor can be hung by the support clamp 11. The end fitting 140 comprises a connected end sleeve 141 and a second hanging part 142. The structure of the end sleeve 141 is as described above, and will not be repeated here. The second hanging part 142 is a groove structure, which covers the end of the end sleeve 141 not connected to the first core rod 110, and the groove structure is a U-shaped groove, the groove opening of which is upwardly arranged, and mounting holes are correspondingly arranged on the two side walls of the U-shaped groove, for mounting the support clamp 11 by bolts, screws and other fasteners, so as to hang the conductor. The support clamp 11 comprises a clamp base and a clamp cover, and the clamp base is provided with an arc-shaped groove for placing the conductor, and the bottom of the clamp cover is correspondingly provided with an arc-shaped groove for assisting in fixing the conductor; mounting holes are correspondingly arranged on both sides of the arc-shaped grooves on the clamp base and the clamp cover, for tightly fixing the conductor between the clamp base and the clamp cover by bolts, screws and other fasteners; mounting holes are also arranged at both ends of the clamp base, for fixedly connecting with the two side walls of the U-shaped groove. When installing the conductor, first, the conductor is fixed on the support clamp 11, i.e. the conductor is placed in the arc-shaped groove of the clamp base, and the clamp cover is tightly fixed on the clamp base, then the support clamp 11 is placed in the groove structure of the end fitting 140, and the mounting holes at both ends of the clamp base are aligned with the mounting holes on the two side walls of the U-shaped groove, and then fasteners are arranged to fix the support clamp 11 in the groove structure, so as to stably hang the conductor on the end fitting 140. The bottom of the second hanging part 142 is provided with a lifting part 143, and the structure and purpose of the lifting part 143 are as described above, and will not be repeated here. The support clamp 11 adopts the clamp structure in the prior art, and will not be specifically limited here.

[0061] In yet another embodiment, as Figure 2 and Figure 7As shown, the end fitting 140 is a plate-type wire clamp fitting, which can be used to hang the wire through the suspension clamp 12. The end fitting 140 includes a connected end sleeve 141 and a second hanging portion 142. The structure of the end sleeve 141 is as described above and will not be repeated here. The second hanging portion 142 is a plate structure, which includes a vertically connected end plate and a wire hanging plate. The end plate covers the end of the end sleeve 141 that is not connected to the first core rod 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 through components such as a U-shaped hanging ring to hang 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.

[0062] 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.

[0063] like Figure 1 and Figure 10 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.

[0064] The first fitting 220 comprises a first sleeve 221 and a first connecting portion 222 connected with each other. One end of the first sleeve 221 is connected with one end of the second core rod 210, for example, the first sleeve 221 can be connected with the second core rod 210 through a press-fit process. The first connecting portion 222 is used to connect the middle portion of the first cross arm 100. The first connecting portion 222 is in a plate shape. The first connecting portion 222 is provided with a third connecting hole 2221, which is used to be matched with the first connecting hole 1221 on the first intermediate connecting portion 122 to realize the assembly of the first cross arm 100 and the second cross arm 200. When being installed, the first connecting portion 222 is arranged close to the first intermediate connecting portion 122. After the third connecting hole 2221 is aligned with the first connecting hole 1221, a fastener such as a bolt or a screw is arranged and fastened to connect the first connecting portion 222 and the first intermediate connecting portion 122 together, so as to connect one end of the second cross arm 200 with the middle portion of the first cross arm 100.

[0065] The second fitting 230 comprises a second sleeve 231 and a second connecting portion 232 connected with each other. One end of the second sleeve 231 is connected with the other end of the second core rod 210, for example, the second sleeve 231 can be connected with the second core rod 210 through a press-fit process. The second connecting portion 232 is used to be connected with the connecting fitting 300, and then the second cross arm 200 is connected with the pole 20. The second connecting portion 232 comprises a first connecting plate 2321 and two second connecting plates 2322. The first connecting plate 2321 covers the end of the second sleeve 231 which is not connected with the second core rod 210. The two second connecting plates 2322 are respectively connected with the two ends of the first connecting plate 2321 perpendicularly. The two second connecting plates 2322 extend away from the second sleeve 231 from the two ends of the first connecting plate 2321 in the same direction, so that the second connecting portion 232 is in a “” shape. Each of the second connecting plates 2322 is provided with two groups of fourth connecting holes 23221. The fourth connecting holes 23221 on the two second connecting plates 2322 are arranged correspondingly and are used to be matched with the connecting fitting 300 through a fastener such as a bolt or a screw. That is, the second sleeve 231 and the second core rod 210 do not need to be punched to be connected, so as to avoid the influence of punching on the mechanical properties of the second core rod 210, and then to avoid the power safety hidden danger.

[0066] As shown in Figure 1 , Figures 10-12 The connecting fitting 300 comprises a pole connecting portion 310 and a cross arm connecting portion 320 connected with each other. The pole connecting portion 310 is connected with the pole 20. The cross arm connecting portion 320 is connected with the other end of the second cross arm 200, and the angle between the second cross arm 200 and the pole 20 is adjustable.

[0067] In the embodiment, the cross section of the electric pole 20 is square, and the electric pole connecting part 310 is correspondingly provided in a plate structure, so as to increase the contact area between the electric pole connecting part 310 and the electric pole 20 and ensure reliable connection therebetween. The electric pole connecting part 310 comprises a first plate member 311, and the first plate member 311 is provided with a first electric pole connecting hole 3111, which is used to abut and fix the first plate member 311 on the electric pole 20 by means of fasteners such as bolts and screws.

[0068] The cross arm connecting part 320 comprises two second plate members 321, which are substantially rectangular plate members. One end of each of the two second plate members 321 is connected perpendicularly to two ends of the first plate member 311, and the two second plate members 321 extend away from the first plate member 311 in the same direction. The distance between the mutually approaching plate surfaces of the two second plate members 321 is slightly greater than the distance between the mutually far-removed plate surfaces of the two second connecting plates 2322 of the second connecting part 232 of the second fitting 230. On the one hand, the second connecting part 232 can move between the two second plate members 321, so as to facilitate adjustment of the angle between the second cross arm 200 and the electric pole 20. On the other hand, the two second plate members 321 can clamp and fix the two second connecting plates 2322 by means of fasteners such as bolts and screws, so as to ensure reliable connection between the second cross arm 200 and the electric pole 20. The second plate member 321 is provided with a fixing hole 3211 and an adjusting hole 3212. The fixing hole 3211 is a circular through hole, and the adjusting hole 3212 is an arc-shaped hole. The circular arc of the adjusting hole 3212 is concentrically arranged with the fixing hole 3211, and the two are matched to enable the second cross arm 200 to rotate about the fixing hole 3211, so as to facilitate adjustment of the angle between the second cross arm 200 and the electric pole 20 and fixed connection of the second cross arm 200 and the connecting fitting 300. The fixing hole 3211 and the adjusting hole 3212 on each second plate member 321 are correspondingly arranged with two groups of fourth connecting holes 23221 on each second connecting plate 2322, so as to adjust the angle between the second cross arm 200 and the electric pole 20 and fixedly connect the second cross arm 200 and the connecting fitting 300, and then the angle between the second cross arm 200 and the electric pole 20 can be adjusted according to design requirements, so as to be flexible in installation and reliable in connection. Moreover, the independent fitting structure can be applied to installation of composite cross arms 10 of different length specifications, so as to have a wider application range.

[0069] In an embodiment, as Figure 11As shown, the length of the first plate member 311 along the length direction of the pole 20 is less than the length of the second plate member 321 near the side of the pole 20, and the first plate member 311 is connected to the upper part of the second plate member 321, and the fixing hole 3211 and the adjusting hole 3212 are located in the middle part of the second plate member 321, i.e. the fixing hole 3211 and the adjusting hole 3212 are located below the first pole connecting hole 3111, which can avoid the fasteners between the pole connecting part 310 and the pole 20 affecting the rotation adjustment of the angle between the second cross arm 200 and the pole 20, and also can reduce the material usage of the connecting fitting 300 and reduce the manufacturing cost.

[0070] When installing the connecting fitting 300, first, the first plate member 311 of the pole connecting part 310 is arranged close to the pole 20, and the first pole connecting hole 3111 on the first plate member 311 is aligned with the mounting hole on the pole 20, and then the fasteners such as bolts and screws are passed through and fastened, so as to fix the connecting fitting 300 on the pole 20. When installing the second cross arm 200, the second connecting part 232 is placed between the two second plate members 321, and the fixing hole 3211, the adjusting hole 3212 and the two groups of fourth connecting holes 23221 of the second connecting part 232 are aligned, and the fasteners such as bolts and screws are passed through the corresponding fixing hole 3211 and fourth connecting hole 23221, adjusting hole 3212 and fourth connecting hole 23221 for pre-fixing, i.e. under the premise of not affecting the rotation of the second connecting part 232 in the cross arm connecting part 320, the approximate positions of the two are defined, at this time the second cross arm 200 can rotate around the fixing hole 3211, i.e. when the second cross arm 200 rotates, the fasteners in the fixing hole 3211 remain in position, and the fasteners in the adjusting hole 3212 slide and adjust in the adjusting hole 3212 around the fixing hole 3211, when the angle between the second cross arm 200 and the pole 20 is adjusted to the preset angle, the above fasteners are fastened, so as to fix and connect the second cross arm 200 and the pole 20. In other embodiments, after the connecting fitting is fixed on the pole, the fasteners can be only passed through the corresponding fixing hole and fourth connecting hole for pre-fixing, when the second cross arm is adjusted in place, the fasteners are then fastened, and the fasteners are passed through and fastened in the corresponding adjusting hole and fourth connecting hole, so as to fix and connect the second cross arm and the pole, which is not specifically limited here.

[0071] Further, in order to make the connection between the connecting fitting 300 and the electric pole 20 more stable, the electric pole connecting portion 310 further comprises a third plate member 312, two ends of the third plate member 312 are respectively connected to the other ends of the two second plate members 321 which are not connected to the first plate member 311, so that the first plate member 311 and the third plate member 312 are respectively located on two sides of the second plate member 321, and the length of the third plate member 312 along the length direction of the electric pole 20 is less than the length of the second plate member 321, the third plate member 312 is connected to the lower part of the second plate member 321, and the third plate member 312 is provided with a second electric pole connecting hole 3121 for further fixing the connecting fitting 300 on the electric pole 20 by means of bolts, screws and other fasteners. The third plate member 312 is provided on one hand to make the upper and lower ends of the connecting fitting 300 can be fastened to the electric pole 20 through the first plate member 311 and the third plate member 312 at the same time, so that the force between them is more uniform and the connection is more reliable; on the other hand, the third plate member 312 is arranged at the end of the second plate member 321 away from the electric pole 20, which can avoid the interference between the third plate member 312 and the fasteners on the second plate member 321 during installation.

[0072] In another embodiment, as shown in Figure 12 The length of the first plate member 311 along the length direction of the electric pole 20 is equal to the length of the side of the second plate member 321 close to the electric pole 20, so that the contact area between the electric pole connecting portion 310 and the electric pole 20 can be increased, and the connection between them is more reliable. In addition, the second plate member 321 can also be a substantially right-angled trapezoidal plate member, that is, the lower edge of the second plate member 321 is horizontally arranged, and the upper edge of the second plate member 321 is arranged downwardly and obliquely from the upper end of the first plate member 311 to the upper end of the third plate member 312, so that the material usage can be reduced and the manufacturing cost can be reduced while ensuring the connection strength of the connecting fitting 300. It can be understood that the specific shape of the upper edge of the second plate member 321 can be adjusted according to the positions of the fixing holes 3211 and the adjusting holes 3212, as long as it does not affect the installation of the second cross arm 200, which is not limited specifically herein.

[0073] It can be understood that when the length of the first plate member 311 is less than the length of the second plate member 321 close to the pole 20 and the first plate member 311 is located at the upper part of the second plate member 321, the lower part of the connecting fitting 300 close to the pole 20 is a hollow structure. During installation, the connecting fitting 300 is first connected with the pole 20 through the first plate member 311, then the second cross arm 200 is installed and adjusted in place, and then the fasteners such as bolts and screws are threaded through the second pole connecting hole 3121 on the third plate member 312 and the mounting hole on the pole 20 and fastened, so as to further fix the connecting fitting 300 on the pole 20. When the length of the first plate member 311 is equal to the length of the second plate member 321 close to the pole 20, the lower part of the first plate member 311 is provided with a third pole connecting hole (not shown in the figure) corresponding to the second pole connecting hole 3121. During installation, the third plate member 312 can be connected with the pole 20 by threading fasteners such as bolts and screws through the second pole connecting hole 3121, the third pole connecting hole and the mounting hole on the pole 20, and other steps are as described above.

[0074] Further, referring to Figure 11 , the two second plate members 321 are each provided with a flange 3213 extending perpendicularly away from the first plate member 311 from the side close to the pole 20, and the two flanges 3213 are located in the same plane as the first plate member 311. The provision of the flange 3213 can increase the contact area between the connecting fitting 300 and the pole 20, so that the force between them is more uniform and the connection is more reliable.

[0075] In combination Figures 1 to 12 , in an embodiment, the first core rod 110 and the second core rod 210 are each made of a composite material, for example, by impregnating glass fibers or aramid fibers with epoxy resin and then performing pultrusion molding. The composite material is more corrosion-resistant and lower in cost than the metal material of the traditional cross arm, and can achieve a substantial weight reduction, making the composite cross arm 10 easy to install.

[0076] In an embodiment, the cross section of the first core rod 110 is square and the cross section of the second core rod 210 is circular. Such a configuration makes the overall structure of the composite cross arm 10 strong, simple and low in cost. In other embodiments, the cross sections of the first core rod and the second core rod can also be triangular, T-shaped, L-shaped, etc., as long as the structure of each core rod meets the strength requirement. The core rods can be different in structure or the same in structure, such as the cross section of the first core rod being triangular and the cross section of the second core rod being square, or the cross sections of the core rods all being square or all being circular, etc., which are not limited specifically herein.

[0077] In an embodiment, the cross section of the fitting sleeve on each core rod is matched with the cross section of the corresponding core rod, i.e. the cross section of the first intermediate sleeve 121, the second intermediate sleeve 132 and the end sleeve 141 is matched with the cross section of the first core rod 110, and the cross section of the first sleeve 221 and the second sleeve 231 is matched with the cross section 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 fitting and the corresponding core rod.

[0078] In an embodiment, each fitting is connected by welding after being separately formed into a fitting assembly, which is reliable and simple to manufacture. In other embodiments, each fitting can be integrally formed by casting or the like, as long as the connection strength between each assembly is ensured, which is not specifically limited herein.

[0079] In an embodiment, the first insulating layer 150 and the second insulating layer 240 each include a sheath, the sheath of the first insulating layer 150 is in sealed connection with the first intermediate fitting 120, the second intermediate fitting 130 and the end fitting 140 at both ends of the first core rod 110, and the sheath of the second insulating layer 240 is in sealed connection with the first fitting 220 and the second fitting 230 at both ends of the second core rod 210, which can effectively prevent external moisture from damaging the first core rod 110 and the second core rod 210, thereby avoiding affecting the service life of the composite cross arm 10.

[0080] Further, the first insulating layer 150 and the second insulating layer 240 can further include a shed arranged on the sheath, the arrangement of the shed can increase the creepage distance of the outer surface of the first cross arm 100 and the second cross arm 200, so that the composite cross arm 10 has sufficient dry arc distance, in addition, the arrangement of the shed can also prevent birds from nesting, thereby improving the overall electrical safety of the composite cross arm 10.

[0081] In an embodiment, the first insulating layer 150 and the second insulating layer 240 are high-temperature vulcanized silicone rubber, the silicone rubber material is coated on the outer periphery of the first core rod 110 and the second core rod 210 by integral vacuum injection molding process, and the high-temperature vulcanized silicone rubber insulating layer is formed integrally, the high-temperature vulcanized silicone rubber has good aging resistance and hydrophobic migration, which can reduce the probability of pollution flashover and rain flashover, and improve the electrical safety of the composite cross arm 10. In other embodiments, the first insulating layer and the second insulating layer can also be formed by a molding process or pre-formed and then sleeved on the outer periphery of the corresponding core rod, which is not specifically limited herein.

[0082] 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, the specifications of the support wire clamp 11 and the suspension wire clamp 12, 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.

[0083] In another application scenario, such as Figures 13-15 As shown, the present application also provides a transmission pole 2000, which is a tension pole. The tension pole includes a composite crossarm 30 and a pole 40, with the composite crossarm 30 fixed to the pole 40. In the power system, a tension pole refers to a tower used to segment the circuit in the middle of a line to control the scope of pole collapse and line breakage. The tension pole is equipped with tension components and tension clamps on the crossarm to hang the conductors.

[0084] The composite crossarm 30 includes a first crossarm 400, two second crossarms 200, two connecting hardware 300 and two tension components 500. The structure of the composite crossarm 30 is basically similar to that of the composite crossarm 10, except that the two ends of the first crossarm 400 are used to connect to the tension clamps 13 to hang the conductors; one end of the two tension components 500 are respectively connected to the two sides of the top of the first crossarm 400, and the other end of the tension component 500 is used to connect to the tension clamps 13 to hang the conductors. The length direction of the tension component 500 is perpendicular to the vertical plane where the first crossarm 400 is located.

[0085] Specifically, the second intermediate hardware 430 of the first cross arm 400 also includes two tension-resistant connecting parts 434, which are arranged on the top side of the top connecting part 431 and symmetrically arranged along the vertical plane where the first cross arm 400 is located. The tension-resistant connecting parts 434 are used to connect the tension-resistant assembly 500.

[0086] In one embodiment, if Figure 13 As shown, the tension connection part 434 is a plate-like structure, and a tension connection hole is provided on the tension connection part 434 for connecting the tension component 500 through a connecting component such as a hanging ring. At this time, the tension component 500 can be a tension insulator.

[0087] In another embodiment, Figure 14As shown, when the top connecting part 431 includes two top connecting plates, the strain connecting part 434 can also be a strain connecting hole arranged on the top side of the top connecting plate, used for connecting the strain assembly 500 through fasteners such as bolts and nuts, at this time, the strain assembly 500 can be a strain clamp. The strain clamp is in an overall L-shaped structure, including a first connecting plate 510 and a second connecting plate 520 connected vertically, wherein the first connecting plate 510 is used for matching connection with the top connecting part 431, and the second connecting plate 520 is used for connecting the strain clamp 13 through a connecting assembly such as a hanging ring; the strain clamp further includes a reinforcing rib 530, which is connected to the first connecting plate 510 and the second connecting plate 520 vertically at the same time, and can further improve the mechanical strength of the strain clamp.

[0088] The first hanging part on the second intermediate clamp 430 is connected with the suspension clamp 12 for hanging the jumper wire. Specifically, the jumper wire is hung on the suspension clamp 12 from the strain clamp 13 on one of the strain assemblies 500, and then is hung on the strain clamp 13 of the other strain assembly 500 on the other side of the pole 40, and the jumper wire is electrically connected with the wires on both sides of the pole 40.

[0089] In an embodiment, as shown in Figure 13 As shown, the end clamp 440 includes an end sleeve 441 and a second hanging part 442, the second hanging part 442 is specifically used for hanging the wire through the strain clamp 13, and the second hanging part 442 is arranged on the side of the end sleeve 441 not connected with the first core rod 410, the second hanging part 442 is in a plate-shaped structure, the second hanging part 442 includes an end plate and a wire hanging plate 4421, the end plate covers the end of the end sleeve 441 not connected with the first core rod 410, the wire hanging plate 4421 extends vertically outward from the side of the end plate away from the end sleeve 441, and the wire hanging plate 4421 is provided with a hanging hole for hanging the triangular connecting plate 443 through a connecting assembly such as a U-shaped hanging ring, and the bottom of the triangular connecting plate 443 is provided with two clamp connecting holes for connecting two strain clamps 13. The strain clamp 13 is hung through the triangular connecting plate 443 to hang the wire, which can not only ensure the strain of the jumper wire, thereby ensuring the electrical safety of the composite cross arm 30, but also provide a certain rotatability, when the longitudinal unbalanced tension occurs in the wires on both sides of the composite cross arm 30, the triangular connecting plate 443 and the strain clamp 13 can be deflected, so that the parameters such as the span (the horizontal distance between the wire suspension points of two adjacent power transmission towers) of the wires on both sides change, and then when deflected to the appropriate position, the tension of the wires on both sides reaches a new balance, the release of the unbalanced tension is completed, the stress on the composite cross arm 30 is reduced, and the service life of the composite cross arm 30 is prolonged.

[0090] In another embodiment, as shown in Figure 15As shown, the wire hanging plate 4421 of the second hanging part 442 of the end fitting 440 extends outward obliquely from the side of the end plate away from the end sleeve 441, and when the end fitting 440 is crimped on the end of the first core rod 410 and installed on the pole 40, the wire hanging plate 4421 is set horizontally, and a number of hanging holes are provided on the wire hanging plate 4421 for connecting the rectangular connecting plate 444. Two wire clamp connection holes are provided at both ends of the rectangular connecting plate 444, which are respectively used to connect two tension clamps 13. The specific connection method is as described above and will not be repeated here. The plate area of ​​the rectangular connecting plate 444 is smaller than that of the triangular connecting plate 443, which can save materials and reduce costs. Furthermore, the cross-sectional dimensions of one end of the end sleeve 441 connected to the end plate gradually decrease from the end of the first core rod 410 toward the end plate, so that the end sleeve 441 can firmly connect the first core rod 410 and the end plate while using less material, and the two ends of the rectangular connecting plate 444 can adopt a trapezoidal or arc-shaped structure, so that the rectangular connecting plate 444 can meet the requirements of opening the hanging hole while using less material, thereby reducing costs.

[0091] The tension insulator can adopt the tension composite insulator structure in the existing technology, the tension clamp 13 can adopt the clamp structure in the existing technology, and the installation method of the tension insulator and the tension clamp 13 can also be achieved by adopting the existing technology, which is not specifically limited here.

[0092] Furthermore, the composite cross arm 10 on the linear rod and the composite cross arm 30 on the tension rod may further include an insulating protective cover 600. The following description will be made using the linear rod as an example. Figure 16 As shown, the insulating protective cover 600 includes a connection hardware protective cover 610 and a pole protective cover 620. The connection hardware protective cover 610 is used to cover the connection hardware 300, and the pole protective cover 620 is used to cover the top of the pole 20. The connection hardware protective cover 610 and the pole protective cover 620 cooperate with each other to cover the metal structure at the top of the pole 20, thereby strengthening the insulation effect of the top of the pole 20, further preventing birds from being electrocuted when taking off, standing or landing on the top of the pole 20 by forming an electric circuit, further reducing the probability of birds being electrocuted and protecting biodiversity. The specific structure is as described above and will not be repeated here.

[0093] Furthermore, the main structure of the insulating protective cover 600 is a rectangular structure with an open bottom, which is convenient for the installation of the insulating protective cover 600; and a number of cavities are provided on the insulating protective cover 600 for passing part of the structure of the second cross arm 200 or fasteners such as bolts and nuts.

[0094] The main structure of the connecting hardware protective cover 610 is a rectangular parallelepiped structure with an opening at the bottom. The size of the rectangular parallelepiped matches the size of the connecting hardware 300, and the size of the bottom opening matches the horizontal cross-sectional size of the connecting hardware 300, so that the connecting hardware protective cover 610 can completely cover the connecting hardware 300 from top to bottom, while saving material costs; the connecting hardware protective cover 610 is provided with a plurality of cavities, one of which is arranged corresponding to the second crossarm 200, that is, it is arranged corresponding to the position where the second crossarm 200 extends from the connecting hardware 300, and the remaining cavities are respectively arranged corresponding to the installation positions of the composite crossarm 10, that is, they are arranged corresponding to the first pole connection hole 3111, the fixing hole 3211 and the adjustment hole 3212, the second pole connection hole 3121, and the third pole connection hole, which facilitates the insertion of fasteners and the installation of the composite crossarm 10 while ensuring the insulation effect.

[0095] The main structure of the pole protective cover 620 is a rectangular structure with an opening at the bottom. The size of the rectangular structure matches the size of the top of the pole 20, and the size of the bottom opening matches the horizontal cross-sectional size of the pole 20, so that the pole protective cover 620 can cover the top of the pole 20 from top to bottom while saving material costs; the pole protective cover 620 is provided with a number of cavities, which are respectively arranged corresponding to the mounting holes on the pole 20, which facilitates the insertion of fasteners and the installation of the composite crossarm 10 while ensuring the insulation effect.

[0096] Furthermore, side openings are provided on the sides of the connecting fitting protective cover 610 and the pole protective cover 620 that are close to each other, and the size of the side openings matches the vertical cross-sectional size with the largest area of ​​the connecting fitting 300, so that the first plate 311 can be installed close to the pole 20, ensuring the connection strength between the connecting fitting 300 and the pole 20, and further ensuring the stable installation of the composite cross arm 10.

[0097] Furthermore, the tops of the connection fitting shield 610 and the pole shield 620 are pointed, with their tips facing upward. Once installed, the pointed structures prevent birds from standing or resting on the tops of the pole 20 and the connection fitting 300, further reducing the probability of electrocution and protecting biodiversity. The pointed structures can be conical or pyramidal, offering a simple structure and ease of manufacture.

[0098] Furthermore, the insulating protective cover 600 also includes a fastener protective cover 630, which is used to cover fasteners such as nuts that need to be inserted during the installation of the connecting hardware 300 and the pole 20, further improving the coverage rate of the metal structure at the top of the pole 20, thereby further enhancing the insulation effect of the top of the pole 20.

[0099] The insulating protective cover 600 is made of silicone rubber, which has excellent insulation properties and can ensure the insulation effect of the insulating protective cover 600. Alternatively, the insulating protective cover can also be made of other insulating materials, which is not limited here.

[0100] In this embodiment, the insulating protective cover 600 is a split structure, that is, each protective cover is manufactured and installed separately. In other embodiments, the insulating protective cover can also be an integrated structure, as long as it can be installed on the top of the pole and the connecting hardware to achieve the insulation function, there is no restriction here.

[0101] 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. An insulating protective cover for covering the metal structure on the top of a transmission pole, wherein the transmission pole comprises a composite crossarm and a pole, wherein the composite crossarm is fixed to the pole, and comprises a first crossarm, two second crossarms, and two connecting hardware, characterized in that: The insulating protective cover includes a connecting hardware protective cover and a pole protective cover. The connecting hardware protective cover is used to cover the connecting hardware, and the pole protective cover is used to cover the top of the pole. The main structure of the insulating protective cover is a rectangular structure with an open bottom.

2. The insulating protective cover according to claim 1, wherein: The main structure of the connecting fitting protective cover is a rectangular parallelepiped structure with an opening at the bottom, and the size of the bottom opening matches the horizontal cross-sectional size of the connecting fitting.

3. The insulating protective cover according to claim 1, wherein: The main structure of the pole protective cover is a rectangular parallelepiped structure with an opening at the bottom. The size of the rectangular parallelepiped structure matches the size of the top of the pole, and the size of the bottom opening matches the size of the horizontal cross-section of the pole.

4. The insulating protective cover according to claim 1, wherein: The insulating protective cover is provided with a plurality of cavities for passing the second cross arm and the fasteners.

5. The insulating protective cover according to claim 4, wherein: The connecting hardware protective cover is provided with a plurality of cavities, one of which is arranged corresponding to the second cross arm, and the remaining cavities are arranged corresponding to the installation positions of the composite cross arm.

6. The insulating protective cover according to claim 4, wherein: The pole protective cover is provided with a plurality of cavities, which are respectively arranged corresponding to the mounting holes on the pole.

7. The insulating protective cover according to claim 1, wherein: Side openings are correspondingly provided on the sides of the connecting fitting protective cover and the pole protective cover that are close to each other, and the size of the side openings matches the size of the vertical cross-section with the largest area of ​​the connecting fitting.

8. The insulating protective cover according to claim 1, wherein: The tops of the connecting hardware protection cover and the pole protection cover are pointed roof structures, and the tips of the pointed roof structures are arranged upward.

9. The insulating protective cover according to claim 1, wherein: The insulating protective cover also includes a fastener protective cover for covering the fasteners that need to be passed through during the installation of the connecting hardware and the pole.

10. The insulating protective cover according to claim 1, wherein: The insulating protective cover is made of silicone rubber.

11. The insulating protective cover according to claim 1, wherein: The insulating protective cover is a split structure.

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