Composite power distribution line

Abstract

The application discloses a composite power distribution line, which comprises a plurality of power distribution poles arranged at intervals along the extension direction of the composite power distribution line and wires hung on the power distribution poles, the plurality of power distribution poles comprise at least two terminal poles, a plurality of strain poles and a plurality of straight poles, the terminal poles are located at the end of the composite power distribution line, the straight poles and the strain poles are located in the middle of the composite power distribution line, the top of the terminal pole is provided with a terminal composite cross arm, the top of the strain pole is provided with a strain composite cross arm, the top of the straight pole is provided with a straight composite cross arm, and the wires are hung on the terminal composite cross arm, the strain composite cross arm and the straight composite cross arm along the extension direction of the composite power distribution line to form the composite power distribution line. The power distribution poles of the composite power distribution line adopt the composite cross arm to hang the wires, the lightning protection level is high, a lightning arrester does not need to be additionally installed, the safety is higher, the cost is lower, and the composite cross arm is not prone to rust and has a longer service life.

Description

Technical Field

[0001] This application relates to the field of overhead power distribution line technology, and in particular to a composite power distribution line. Background Technology

[0002] A power distribution line is a line that carries electricity from a step-down substation to a distribution transformer or from a distribution substation to a power-consuming unit.

[0003] Traditional power distribution lines use iron crossarms mounted on cement or steel pipe poles to support conductors. However, iron crossarms have the following drawbacks: low lightning protection level, requiring shielding during live-line work, which is costly; prone to tripping due to lightning, bird damage, etc., leading to power accidents; and susceptible to corrosion, reducing the service life of the crossarm. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this application is to provide a composite power distribution line with high overall lightning protection level, higher safety, lower cost, and composite crossarm that is not easy to rust and has a longer service life.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a composite power distribution line, comprising a plurality of distribution poles spaced apart along the extension direction of the composite power distribution line and conductors suspended on the distribution poles. The plurality of distribution poles include at least two terminal poles, a plurality of tension poles, and a plurality of straight poles. The terminal poles are located at the ends of the composite power distribution line, and the straight poles and tension poles are located in the middle of the composite power distribution line. A terminal composite crossarm is provided at the top of the terminal pole, a tension composite crossarm is provided at the top of the tension pole, and a straight composite crossarm is provided at the top of the straight pole. The conductors are suspended along the extension direction of the composite power distribution line on the terminal composite crossarms, the tension composite crossarms, and the straight composite crossarms to form the composite power distribution line.

[0006] Among them, the pole bodies of the terminal pole, straight pole and tension pole are all integrally formed by fiber-reinforced composite materials through a winding process.

[0007] Among them, at least one terminal pole is provided with several transformer composite crossarms and transformer composite crossarms at intervals and parallel to each other, and the transformer composite crossarms are located between the terminal composite crossarms and the transformer composite crossarms. The transformer composite crossarms are used to install down conductor crossarms, knife switches, fuses or surge arresters, and the transformer composite crossarms are used to install transformers.

[0008] In this configuration, at least one terminal pole is installed adjacent to a straight pole, and the transformer composite crossarm and several transformer substation composite crossarms are installed across the middle of the terminal pole and the adjacent straight pole.

[0009] Among them, several composite crossarms in the transformer substation are used to install down conductor crossarms, fuses and surge arresters in sequence from top to bottom. The conductors are connected from the top of the terminal composite crossarm downwards to the down conductor crossarm, fuse, surge arrester and transformer in sequence.

[0010] Among the several transformer substation composite crossarms, at least one composite crossarm is used to install a knife switch. The knife switch is located between the down conductor crossarm and the fuse. The conductors are connected in sequence to the down conductor crossarm, the knife switch, the fuse, the surge arrester, and the transformer.

[0011] In one section of the composite power distribution line, at least one straight pole is installed between two adjacent tension poles.

[0012] In one section of the composite power distribution line, at least one tension rod is set at an angle to the conductors on both sides of the extension direction of the composite power distribution line.

[0013] The terminal composite crossarm includes: a first terminal crossarm; two second terminal crossarms, one end of which is connected to both ends of the first terminal crossarm, and the other end of which is used to connect to a wire clamp. The length direction of the second terminal crossarm is in the same horizontal plane as the length direction of the first terminal crossarm and is perpendicular to each other; a terminal connecting hardware, the middle part of the first terminal crossarm is connected to the terminal connecting hardware; and a third terminal crossarm, one end of which is connected to the terminal connecting hardware, and the other end of which is used to connect to a wire clamp. The length direction of the third terminal crossarm is set in the vertical direction.

[0014] The linear composite crossarm includes a first linear crossarm and a second linear crossarm. The second linear crossarm is connected above the middle part of the first linear crossarm, and the length direction of the second linear crossarm is set in the vertical direction.

[0015] The composite crossarm of the transformer area includes: a first transformer area core rod; two first transformer area end fittings, which are respectively connected to the two ends of the first transformer area core rod and are used to connect the rod body; at least one first transformer area intermediate fitting, which is connected to the middle part of the first transformer area core rod; and a first transformer area insulation layer, which covers at least a portion of the outer peripheral surface of the first transformer area core rod.

[0016] The composite crossarm of the transformer substation includes: a second transformer substation core rod; a transformer substation connecting fitting connected to the middle of the second transformer substation core rod for connecting the rod body; two second transformer substation end fittings connected to the two ends of the second transformer substation core rod respectively; at least one second transformer substation intermediate fitting connected to the middle of the second transformer substation core rod and located between the transformer substation connecting fitting and the second transformer substation end fitting; and a second transformer substation insulation layer covering at least a portion of the outer circumferential surface of the second transformer substation core rod.

[0017] The tension composite crossarm includes: a first tension crossarm; two second tension crossarms, the middle portions of which are respectively connected to the two ends of the first tension crossarm, the two ends of which are used to connect clamps, the length direction of the second tension crossarms being in the same horizontal plane and perpendicular to the length direction of the first tension crossarms; tension connecting hardware, the middle portion of the first tension crossarm being connected to the tension connecting hardware; two tension insulators, one end of which is respectively connected to the two sides of the tension connecting hardware, the other end of which is used to connect clamps, the length direction of which is parallel to the length direction of the second tension crossarms; and a third tension crossarm, one end of which is connected to the tension connecting hardware, the other end of which is used to hang the conductor, the length direction of which is set vertically.

[0018] The beneficial effects of this application are as follows: Unlike the prior art, the distribution poles of the composite power distribution line of this application all use composite crossarms for hanging the wires. The composite crossarm has a simple structure, reliable strength, and high lightning protection level. It does not require additional surge arresters, which makes it safer, cheaper, less prone to corrosion, and has a longer service life.

[0019] Meanwhile, the insulation layer of the composite crossarm is made of high-temperature vulcanized silicone rubber, which has good aging resistance and hydrophobic migration properties, reducing the probability of pollution flashover and rain flashover and improving the electrical safety of the composite crossarm.

[0020] In addition, the poles are all made of fiber-reinforced composite materials, which are lightweight, high-strength, and tough, significantly reducing installation and transportation costs, effectively preventing pole collapse accidents, and have excellent corrosion resistance and electrical insulation properties, making them more widely applicable and safer. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the composite power distribution line 1 according to one embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the terminal composite crossarm 100 according to one embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the terminal connection fitting 130 according to one embodiment of this application;

[0024] Figure 4 This is a structural schematic diagram of the tension-resistant composite crossarm 200 according to one embodiment of this application;

[0025] Figure 5 This is a structural schematic diagram of the linear composite crossarm 300 according to one embodiment of this application;

[0026] Figure 6 This is a structural schematic diagram of the composite crossarm 400 of the transformer area according to one embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the first crossarm 510 according to an embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the structure of the lead wire crossarm 600 according to one embodiment of this application;

[0029] Figure 9 This is a structural schematic diagram of the composite crossarm 1100 of the transformer area according to another embodiment of this application. Detailed Implementation

[0030] As requested, specific embodiments of this application are disclosed herein. However, it should be understood that the embodiments disclosed herein are merely typical examples of this application and may be embodied in various forms. Therefore, the specific details disclosed herein are not intended to be limiting, but merely to serve as the basis for the claims and as a representative basis for teaching those skilled in the art to apply this application differently in practice in any appropriate manner, including employing the various features disclosed herein in combination with features that may not be explicitly disclosed herein.

[0031] The term "connection" as used in this application, unless otherwise explicitly specified or limited, should be interpreted broadly, encompassing both direct connection and connection via an intermediate medium. In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "upper," "lower," "end," and "one end" is based on the orientation or positional relationship shown in the accompanying drawings and is used solely for the convenience of describing this application and for simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0032] In a power system, a distribution line is a power line used to distribute electrical energy. It typically consists of several terminal poles, several straight poles, several tension poles, and conductors suspended on each pole. A terminal pole is a tower used to bear the tension of the conductor at one end of the line; the crossarm on the terminal pole only supports the conductor on one side, bearing the tension of that side. A straight pole is a tower used to support the conductor in the middle of the line. Straight poles support the conductor by installing insulators on the crossarms or directly by hanging hardware. Straight poles generally only bear the weight of the insulators, hardware, and conductor, as well as horizontal wind force, and do not bear the tension of the conductor along the line direction. A tension pole is a tower used to segment the circuit in the middle of the line to control the range of pole collapse and line breakage. Tension poles support the conductor by installing tension insulators and tension clamps on the crossarms. In addition to bearing the weight of the insulators, hardware, and conductor, as well as horizontal wind force, they also bear the tension of the conductors on both sides.

[0033] like Figure 1 As shown, this application provides a composite power distribution line 1 (only a portion of the line structure is shown in the figure), including a plurality of distribution poles spaced apart along the extension direction of the composite power distribution line 1 and conductors suspended on the distribution poles. The plurality of distribution poles include at least two terminal poles 10, a plurality of tension poles 20 and a plurality of straight poles 30. The terminal poles 10 are located at the ends of the composite power distribution line 1, and the straight poles 30 and tension poles 20 are located in the middle of the composite power distribution line 1. A terminal composite crossarm 100 is provided at the top of the terminal poles 10, a tension composite crossarm 200 is provided at the top of the tension poles 20, and a straight composite crossarm 300 is provided at the top of the straight poles 30. The conductors are suspended along the extension direction of the composite power distribution line 1 on the terminal composite crossarms 100, the tension composite crossarms 200 and the straight composite crossarms 300 to form the composite power distribution line 1.

[0034] The composite power distribution line 1 of this application uses composite crossarms to hang conductors on the distribution poles. The structure is simple and the strength is reliable. Compared with traditional iron crossarms, the external insulation of the composite crossarm can provide sufficient arc distance, has a high level of lightning protection, does not require the installation of surge arresters, is safer and lower in cost. In addition, the composite crossarm is not easy to rust during operation and has a longer service life.

[0035] It should be noted that, unless otherwise specified, the term "middle" in this application refers to the position between the two ends, not the center in a strict sense.

[0036] It is understandable that when the composite power distribution line 1 only includes the main line, the several distribution poles include two terminal poles 10, several tension poles 20, and several straight poles 30. The two terminal poles 10 are located at both ends of the main line, and the several tension poles 20 and several straight poles 30 are located in the middle of the main line. When the composite power distribution line 1 includes the main line and several branch lines, the several branch lines are formed by branching from several positions in the middle of the main line to both sides of the direction of extension of the main line. The several distribution poles include several terminal poles 10, several tension poles 20, and several straight poles 30, where the two terminal poles 10 are located at both ends of the main line, the remaining terminal poles 10 are located at the ends of the several branch lines, and the several tension poles 20 and several straight poles 30 are located in the middle of the main line and the several branch lines. When the composite power distribution line 1 includes more levels of branch lines, the specific arrangement of the several distribution poles follows the same principle and will not be described again.

[0037] Combination Figure 1 and Figure 2 As shown, the terminal pole 10 includes a pole body, a terminal clamp, and a terminal composite crossarm 100, which is connected to the top of the pole body via the terminal clamp.

[0038] The terminal composite crossarm 100 includes a first terminal crossarm 110, two second terminal crossarms 120, a terminal connecting fitting 130, and a third terminal crossarm 140. One end of each of the two second terminal crossarms 120 is connected to both ends of the first terminal crossarm 110, and the other end of each second terminal crossarm 120 is used to connect to a terminal clamp. The length direction of the second terminal crossarm 120 is in the same horizontal plane as the length direction of the first terminal crossarm 110 and is perpendicular to each other. The middle part of the first terminal crossarm 110 is connected to the terminal connecting fitting 130. One end of the third terminal crossarm 140 is connected to the terminal connecting fitting 130, and the other end of the third terminal crossarm 140 is used to connect to a terminal clamp. The length direction of the third terminal crossarm 140 is set in the vertical direction.

[0039] The first terminal crossarm 110 includes a first terminal core rod 111 (marked in the figure for illustrative purposes only), a terminal intermediate fitting 112, two terminal end fittings 113, and a first terminal insulating layer 114. The terminal intermediate fitting 112 connects the terminal connecting fitting 130 and the middle part of the first terminal core rod 111, and is used to connect the middle part of the first terminal crossarm 110 to the terminal connecting fitting 130; one end of each of the two terminal end fittings 113 is connected to both ends of the first terminal core rod 111, and the other ends of each of the two terminal end fittings 113 are used to connect to the second terminal crossarm 120; the first terminal insulating layer 114 covers at least a portion of the outer peripheral surface of the first terminal core rod 111.

[0040] The terminal intermediate fitting 112 includes a connected terminal intermediate sleeve and a terminal intermediate connector. The terminal intermediate sleeve is fitted onto the middle of the first terminal core rod 111. The terminal intermediate connector is used to connect with the terminal connecting fitting 130, thereby connecting the first terminal crossarm 110 to the terminal connecting fitting 130. The bottom of the terminal intermediate connector is provided with a T-slot, which cooperates with a square head bolt to connect the terminal intermediate connector and the terminal connecting fitting 130. This eliminates the need to drill holes in the terminal intermediate sleeve and the first terminal core rod 111 for connection, avoiding the impact of drilling on the mechanical properties of the first terminal core rod 111 and thus preventing potential electrical safety hazards.

[0041] The second terminal crossarm 120 includes a second terminal core 121 (marked in the figure for illustrative purposes only), a terminal connection part 122, a terminal clamp connection part 123, and a second terminal insulation layer 124. The terminal connection part 122 and the terminal clamp connection part 123 are respectively connected to the two ends of the second terminal core 121. The terminal connection part 122 is used to connect the terminal end fitting 113, thereby realizing the assembly of the second terminal crossarm 120 and the first terminal crossarm 110. The terminal clamp connection part 123 is used to connect the terminal clamp for hanging the wire. The second terminal insulation layer 124 covers at least a portion of the outer peripheral surface of the second terminal core 121.

[0042] like Figure 3As shown, the terminal connection hardware 130 includes a terminal clamp connection part 131, a terminal horizontal connection part 132, and a terminal top connection part 133 connected in sequence. The terminal clamp connection part 131 is used to cooperate with the terminal clamp to fix the terminal composite crossarm 100 to the pole body of the terminal rod 10. The terminal horizontal connection part 132 is used to connect the first terminal crossarm 110, and the terminal top connection part 133 is used to connect the third terminal crossarm 140. The terminal connection hardware 130 facilitates the assembly of the first terminal crossarm 110 and the third terminal crossarm 140, and also facilitates the connection of the terminal composite crossarm 100 as a whole to the pole body of the terminal rod 10.

[0043] The terminal clamp connection part 131 includes a vertical connecting plate 1311 and a concave block 1312. The vertical connecting plate 1311 is provided with a connecting hole for connecting the rod body of the terminal rod 10. The side of the vertical connecting plate 1311 is provided with a concave block 1312 that is arc-shaped and recessed towards the rod body. The concave block 1312 can partially surround the rod body to increase the contact area between the two and make the installation firm.

[0044] The terminal horizontal connection part 132 is vertically connected to the top of the terminal clamp connection part 131 in the horizontal direction. The terminal horizontal connection part 132 includes a horizontal connection plate 1321, which extends vertically outward from the top of the vertical connection plate 1311 of the terminal clamp connection part 131. The horizontal connection plate 1321 is provided with a connection hole to be connected to the terminal intermediate hardware 112 through the aforementioned square head bolt, thereby fixing the first terminal crossarm 110 on the horizontal connection plate 1321.

[0045] The terminal top connection part 133 includes an L-shaped plate 1331. The L-shaped plate 1331 includes a horizontal plate and a vertical plate that are perpendicularly connected to each other. The vertical plate is arranged in a vertical direction and its middle part is perpendicularly connected to the horizontal connecting plate 1321. The horizontal plate is arranged in a horizontal direction and extends vertically outward from the top of the vertical plate. This extension direction is the same as the extension direction of the horizontal connecting plate 1321 extending outward from the top of the vertical connecting plate 1311, so that the horizontal plate of the L-shaped plate 1331 is located on the side above the horizontal connecting plate 1321. A third terminal crossarm 140 can be connected above the horizontal plate. Thus, when the first terminal crossarm 110 is fixed on the horizontal connecting plate 1321 and the third terminal crossarm 140 is fixed on the horizontal plate, the third terminal crossarm 140 is located on the side above the first terminal crossarm 110.

[0046] The terminal connecting hardware 130 can be provided with several reinforcing ribs. For example, reinforcing ribs can be provided on the terminal clamp connecting part 131, that is, reinforcing ribs can be provided between two concave blocks 1312, so that the reinforcing ribs connect the two concave blocks 1312 at the same time, thereby improving the strength of the terminal clamp connecting part 131. Reinforcing ribs can also be provided on the terminal top connecting part 133, that is, reinforcing ribs can be provided between the two plates of the L-shaped plate 1331, so that the reinforcing ribs connect the horizontal plate and the vertical plate at the same time, thereby improving the strength of the L-shaped plate 1331. Reinforcing ribs can also be provided between the terminal clamp connecting part 131, the terminal horizontal connecting part 132 and the terminal top connecting part 133, that is, the reinforcing ribs connect the vertical connecting plate 1311 of the terminal clamp connecting part 131, the horizontal connecting plate 1321 of the terminal horizontal connecting part 132 and the vertical plate of the terminal top connecting part 133 at the same time, thereby improving the overall strength of the terminal connecting hardware 130.

[0047] The terminal connecting hardware 130 can be an integral part or a combination part. That is, the terminal clamp connecting part 131, the terminal horizontal connecting part 132 and the terminal top phase connecting part 133 of the terminal connecting hardware 130 can be formed separately and then connected by welding or other methods. Alternatively, the terminal connecting hardware 130 can also be formed integrally by casting or other methods. This application does not impose specific restrictions on this.

[0048] The third terminal crossarm 140 includes a third terminal core rod 141, a terminal bottom connecting part 142, a terminal top connecting part 143, and a third terminal insulation layer 144. The terminal bottom connecting part 142 and the terminal top connecting part 143 are located at both ends of the third terminal core rod 141. The terminal bottom connecting part 142 is used to connect with the terminal connecting hardware 130, thereby realizing the assembly of the third terminal crossarm 140 and the first terminal crossarm 110. The terminal top connecting part 143 is used to connect the terminal clamp to hang the wire. The third terminal insulation layer 144 covers at least a portion of the outer peripheral surface of the third terminal core rod 141.

[0049] Combination Figure 1 and Figure 4 As shown, the tension rod 20 includes a rod body and a tension composite crossarm 200, which is connected to the top of the rod body.

[0050] The tension composite crossarm 200 includes a first tension crossarm 210, two second tension crossarms 220, tension connecting hardware 230, two tension insulators 240, and a third tension crossarm 250. The middle portions of the two second tension crossarms 220 are respectively connected to the two ends of the first tension crossarm 210. The two ends of the second tension crossarms 220 are used to connect tension clamps. The length direction of the second tension crossarms 220 is in the same horizontal plane as the length direction of the first tension crossarm 210 and is perpendicular to each other. The middle portion of the first tension crossarm 210 is connected to the tension connecting hardware 230. One end of the two tension insulators 240 is respectively connected to both sides of the tension connecting hardware 230. The other end of the tension insulators 240 is used to connect to the tension clamps. The length direction of the tension insulators 240 is parallel to the length direction of the second tension crossarms 220. One end of the third tension crossarm 250 is connected to the tension connecting hardware 230. The other end of the third tension crossarm 250 is used to hang the conductor. The length direction of the third tension crossarm 250 is set in the vertical direction.

[0051] The structure of the first tension crossarm 210 is the same as that of the first terminal crossarm 110, and will not be described again here.

[0052] The second tension crossarm 220 includes a second tension core rod 221 (marked in the figure for illustrative purposes only), a second tension connecting part 222, two tension clamp connecting parts 223, and a second tension insulation layer 224. The second tension connecting part 222 is sleeved on the middle of the second tension core rod 221 and is used to connect the first tension crossarm 210. The two tension clamp connecting parts 223 are respectively connected to the two ends of the second tension core rod 221 and are used to connect tension clamps to hang the conductor. The second tension insulation layer 224 covers at least part of the outer peripheral surface of the second tension core rod 221. The second tension core rod 221, the second tension connecting part 222, the two tension clamp connecting parts 223, and the second tension insulation layer 224 are all structurally similar to the components of the aforementioned second terminal crossarm 120, and will not be described in detail here.

[0053] The tension connecting fitting 230 includes a tension clamp connecting part 231, a tension horizontal connecting part 232, a tension top phase connecting part 233, a first tension insulator connecting part 234, a tension clamp 235, and a second tension insulator connecting part 236. The tension clamp connecting part 231 is connected to the tension horizontal connecting part 232, and the tension clamp connecting part 231 is matched and connected to the tension clamp 235 to fix the tension composite crossarm 200 to the pole body of the tension rod 20. The tension horizontal connecting part 232 is used to connect the first tension crossarm 210. The tension top phase connecting part 233 is connected to the tension horizontal connecting part 232 but not to the tension clamp. The hoop connection 231 is connected to one edge and extends upward to connect the third tension crossarm 250; the first tension insulator connection 234 is connected to the bottom of the tension hoop connection 231 on the side not connected to the tension hoop 235, and is used to connect the tension insulator 240; correspondingly, the side of the tension hoop 235 not connected to the tension hoop connection 231 is connected to the second tension insulator connection 236, which is used to connect the tension insulator 240, so that when the tension composite crossarm 200 is installed on the pole body of the tension rod 20, the two tension insulators 240 are respectively connected to both sides of the tension connecting hardware 230.

[0054] The tension insulator 240 can adopt the tension composite insulator structure in the existing technology, and no specific restrictions are made here.

[0055] The structure of the third tension crossarm 250 is similar to that of the third terminal crossarm 140. The difference is that the structure of the fittings at the bottom of the third tension crossarm 250 used to connect the tension connecting fittings 230 is adapted to the structure of the tension top phase connecting part 233, which will not be described in detail here.

[0056] Combination Figure 1 and Figure 5 As shown, the straight bar 30 includes a bar body, a straight clamp, and a straight composite crossarm 300, with the straight composite crossarm 300 connected to the top of the bar body via the straight clamp.

[0057] The linear composite crossarm 300 includes a first linear crossarm 310 and a second linear crossarm 320. The second linear crossarm 320 is connected above the middle part of the first linear crossarm 310, and the length direction of the second linear crossarm 320 is arranged in the vertical direction.

[0058] In one application scenario, the first linear crossarm 310 includes two first linear core rods 311 (marked in the figure for illustrative purposes only), a linear intermediate fitting 312, two linear end fittings 313, and a first linear insulation layer 314. One end of each of the two first linear core rods 311 is connected to both ends of the linear intermediate fitting 312, which is used to fix the first linear crossarm 310 to the rod body of the linear rod 30. The two linear end fittings 313 are connected to the other ends of the two first linear core rods 311 and are used to hang wires. The first linear insulation layer 314 covers at least a portion of the outer circumferential surface of the first linear core rods 311.

[0059] The straight intermediate fitting 312 includes a straight intermediate connecting part and two straight mandrel connecting parts. The two straight mandrel connecting parts are respectively connected to the two ends of the straight intermediate connecting part and are used to connect the first straight mandrel 311. The straight intermediate connecting part includes at least two plates. The at least two plates are connected in sequence and extend along the length direction of the straight intermediate fitting 312. Any two adjacent plates are perpendicular to each other. One plate is set close to the pole body and is used to cooperate with the straight clamp to fix the first straight crossarm 310 to the pole body. The plate adjacent to the plate close to the pole body is used to connect the second straight crossarm 320.

[0060] The straight end fitting 313 can be a hanging wire fitting of existing technology, and no specific restrictions are made here.

[0061] In another application scenario, the first linear crossarm can also be a one-piece mandrel. In this case, the first linear crossarm includes a first linear mandrel, a linear intermediate fitting, two linear end fittings, and a first linear insulation layer. The linear intermediate fitting is connected to the middle of the first linear mandrel and is used to fix the first linear crossarm to the rod body of the linear rod 30. The linear intermediate fitting includes a linear intermediate sleeve, a linear intermediate connecting part, and a linear top phase connecting part. The linear intermediate sleeve is a hollow tube and is fixedly sleeved on the middle of the first linear mandrel. The linear intermediate connecting part is a plate-shaped piece and is vertically connected to one side of the linear intermediate sleeve. It is used to cooperate with the linear clamp to fix the first linear crossarm to the rod body. The linear top phase connecting part is a plate-shaped piece and is horizontally connected to the top side of the linear intermediate connecting part. The linear top phase connecting part is used to connect the second linear crossarm. Reinforcing ribs are provided between the linear intermediate sleeve, the linear intermediate connecting part, and the linear top phase connecting part to improve the overall strength of the linear intermediate fitting. The remaining structure of the first linear crossarm using an integral mandrel is similar to that of the aforementioned first linear crossarm 310, and will not be described again here.

[0062] The second linear crossarm 320 includes a second linear core 321 (marked in the figure for illustrative purposes only), a first linear fitting 322, a second linear fitting 323, and a second linear insulation layer 324. The first linear fitting 322 connects the bottom of the second linear core 321 and the top of the linear intermediate fitting 312 to achieve the assembly of the second linear crossarm 320 and the first linear crossarm 310. The second linear fitting 323 connects the top of the second linear core 321 and is used to hang the conductor. The second linear insulation layer 324 covers at least a portion of the outer peripheral surface of the second linear core 321.

[0063] The first straight fitting 322 and the second straight fitting 323 may adopt the fitting structure of the prior art, and no specific restrictions are imposed here.

[0064] Continue reading Figure 1 At least one terminal pole 10 is provided with a number of transformer composite crossarms 400 and transformer composite crossarms 500 arranged in parallel at intervals. The transformer composite crossarms 400 are located between the terminal composite crossarms 100 and the transformer composite crossarms 500. The transformer composite crossarms 400 are used to install down conductor crossarms 600, knife switches 700, fuses 800 or surge arresters 900. The transformer composite crossarms 500 are used to install transformers 1000.

[0065] In one application scenario, at least one terminal pole 10 is adjacent to a straight pole 30, and a transformer composite crossarm 500 and several transformer substation composite crossarms 400 span the middle of the terminal pole 10 and the adjacent straight pole 30. For example, at one end of the main line of the composite power distribution line 1, a terminal pole 10 is adjacent to a straight pole 30; or at the end of one branch line of the composite power distribution line 1, a terminal pole 10 is adjacent to a straight pole 30; or at the end of the main line and several branch lines of the composite power distribution line 1, a terminal pole 10 is adjacent to a straight pole 30. It is understood that at least one terminal pole 10 can also be adjacent to a tension pole 30, as long as it can span the transformer composite crossarm 500 and the transformer substation composite crossarm 400, and no specific restrictions are made here.

[0066] like Figure 6As shown, the transformer substation composite crossarm 400 includes a first transformer substation core rod 410 (marked in the figure for illustrative purposes only), two first transformer substation end fittings 420, at least one first transformer substation intermediate fitting 430, and a first transformer substation insulation layer 440. The two first transformer substation end fittings 420 are respectively connected to the two ends of the first transformer substation core rod 410 and are used to connect the rod body with the transformer substation clamp, that is, to connect the rod body of the terminal rod 10 and the rod body of the adjacent straight rod 30, thereby realizing the cross-mounting of the transformer substation composite crossarm 400. The first transformer substation intermediate fitting 430 is connected to the middle of the first transformer substation core rod 410 and is used to install power accessories or equipment such as down conductor crossarm 600, knife switch 700, fuse 800, and surge arrester 900. The first transformer substation insulation layer 440 covers at least part of the outer peripheral surface of the first transformer substation core rod 410.

[0067] Several composite crossarms 400 in each transformer substation are used to install down conductor crossarms 600, fuses 800, and surge arresters 900 sequentially from top to bottom. Conductors connect down conductor crossarms 600, fuses 800, surge arresters 900, and transformers 900 sequentially from the top of the terminal composite crossarm 100 downwards. For example, the number of composite crossarms 400 in each transformer substation can be set to three, with each set used to install down conductor crossarms 600, fuses 800, and surge arresters 900 respectively; or there can be four composite crossarms 400, with two used to install fuses 800 and the remaining two used to install down conductor crossarms 600 and surge arresters 900 respectively; or five or more composite crossarms 400 can be used, adjusted according to the installation requirements of electrical accessories or equipment, without specific limitations.

[0068] Combination Figure 1 and Figure 7 As shown, the transformer composite crossarm 500 includes two first crossarms 510. The length directions of the two first crossarms 510 are located in the same horizontal plane and are parallel to each other. The two ends of the two first crossarms 510 are respectively clamped to two poles and then connected together. That is, the two ends of the two first crossarms 510 are respectively clamped to the pole of the terminal pole 10 and the pole of the adjacent straight pole 30 and then connected together by connecting components such as double-ended screws, so that the transformer composite crossarm 500 is installed across the terminal pole 10 and the adjacent straight pole 30. The middle parts of the two first crossarms 510 are connected together by connecting components such as angle steel to form a mounting base for installing the transformer 1000.

[0069] The first crossarm 510 includes a first core rod 511 (marked in the figure for illustrative purposes only), two first end fittings 512, several first intermediate fittings 513, and a first insulating layer 514. The two first end fittings 512 are respectively connected to the two ends of the first core rod 511, and the first end fittings 512 corresponding to the two first crossarms 510 are used to connect the connecting rod body; the several first intermediate fittings 513 are connected to the middle of the first core rod 511, and the first intermediate fittings 513 corresponding to the two first crossarms 510 can be connected together by angle steel or the like to form a mounting base for mounting the transformer 1000; the first insulating layer 514 covers at least a portion of the outer peripheral surface of the first core rod 511.

[0070] Furthermore, since the transformer composite crossarm 500 is located below the transformer substation composite crossarm 400 on the pole, in order to prevent it from sliding down due to gravity after the transformer 1000 is installed, reinforcing clamps can be added below the connection points between the transformer composite crossarm 500 and the pole at both ends. The two reinforcing clamps are fixed to the poles of the terminal pole 10 and the adjacent straight pole 30, respectively, and abut against the first end fittings 512 corresponding to the two first crossarms 510, further supporting the transformer composite crossarm 500 and thus playing a reinforcing role.

[0071] like Figure 8 As shown, the down conductor crossarm 600 includes a down conductor core rod 610 (marked in the figure for illustrative purposes only), a first down conductor fitting 620, a second down conductor fitting 630, and a down conductor insulation layer 640. The first down conductor fitting 620 and the second down conductor fitting 630 are respectively connected to the two ends of the down conductor core rod 610. The first down conductor fitting 620 is used to connect the composite crossarm 400 of the transformer substation, and the second down conductor fitting 630 is used to hang the conductor. The down conductor insulation layer 640 covers at least a portion of the outer peripheral surface of the down conductor core rod 610. Both the first down conductor fitting 620 and the second down conductor fitting 630 can adopt existing fitting structures and can be adjusted according to installation requirements and conductor hanging requirements. No specific restrictions are imposed here.

[0072] Furthermore, to facilitate the control of the opening and closing of the composite power distribution line 1, at least one of the composite crossarms 400 in several transformer substations is used to install a disconnect switch 700. The disconnect switch 700 is located between the down conductor crossarm 600 and the fuse 800, and the conductors are connected in sequence to the down conductor crossarm 600, the disconnect switch 700, the fuse 800, the surge arrester 900, and the transformer 1000. For example, the disconnect switch 700 can be installed directly through one composite crossarm 400 in one transformer substation, or the disconnect switch 700 can be installed through two composite crossarms 400 in one go; no specific restrictions are imposed here.

[0073] In another application scenario, several transformer composite crossarms 1100 and transformer composite crossarms can be set at intervals and parallel on a single terminal pole 10. The transformer composite crossarms 1100 are located between the terminal composite crossarms 100 and the transformer composite crossarms. The transformer composite crossarms 1100 are used to install down conductor crossarms 600, knife switches 700, fuses 800, or surge arresters 900. The transformer composite crossarms are used to install transformers 1000.

[0074] In this embodiment, such as Figure 9 As shown, the composite crossarm 1100 of the transformer substation includes a second transformer substation core rod 1110 (marked in the figure for illustrative purposes only), a transformer substation connecting fitting 1120, two second transformer substation end fittings 1130, at least one second transformer substation intermediate fitting 1140, and a second transformer substation insulation layer 1150. The transformer substation connecting hardware 1120 is connected to the middle of the second transformer substation core rod 1110 and is used to connect the pole body of the terminal pole 10 in conjunction with the transformer substation clamp; the two second transformer substation end hardware 1130 are respectively connected to the two ends of the second transformer substation core rod 1110, and the second transformer substation middle hardware 1140 is connected to the middle of the second transformer substation core rod 1110, and the second transformer substation middle hardware 1140 is located between the transformer substation connecting hardware 1120 and the second transformer substation end hardware 1130. Both the second transformer substation end hardware 1130 and the second transformer substation middle hardware 1140 are used to install electrical accessories and equipment; the second transformer substation insulation layer 1150 covers at least part of the outer peripheral surface of the second transformer substation core rod 1110.

[0075] In some embodiments, the cross-sections of the core rods of the terminal composite crossarm 100, tension composite crossarm 200, straight composite crossarm 300, transformer substation composite crossarm 400, transformer substation composite crossarm 1100, and transformer crossarm 500 can be adjusted according to requirements. For example, they can all be square, circular, triangular, T-shaped, L-shaped, etc., or different shapes can be used, as long as the structure of each core rod meets the strength requirements of the corresponding composite crossarm. No specific restrictions are imposed here. Furthermore, each core rod and its end or middle fittings are connected by a crimping process through the sleeve of the corresponding fitting. The cross-section of each core rod matches the cross-sectional shape and size of the sleeve of the corresponding fitting, so that the sleeve of the fitting is fitted and fixed on the outer periphery of the corresponding core rod, increasing the contact area between the two and ensuring reliable connection.

[0076] In some embodiments, the insulation layers of the terminal composite crossarm 100, tension composite crossarm 200, straight composite crossarm 300, transformer substation composite crossarm 400, transformer substation composite crossarm 1100, and transformer crossarm 500 all include sheaths. Each sheath, the core rod covered by each sheath, and the corresponding fittings on the core rod are all sealed together, effectively preventing external moisture intrusion and damage to the core rod, thus affecting the service life of the composite crossarm. Each insulation layer may also include sheds spaced on the sheath. The sheds increase the creepage distance on the outer surface of the composite crossarm, thereby... The composite crossarm has sufficient dry arc distance. In addition, the umbrella skirt can prevent birds from nesting, improving the overall electrical safety of the composite crossarm. Each insulation layer is made of high-temperature vulcanized silicone rubber. The silicone rubber material can be wrapped around the outer periphery of the corresponding mandrel through a vacuum injection molding process to form a high-temperature vulcanized silicone rubber insulation layer. Alternatively, it can be formed by molding or pre-molding and then sleeved onto the outer periphery of the corresponding mandrel. High-temperature vulcanized silicone rubber has good aging resistance and hydrophobic migration properties, which can reduce the probability of pollution flashover and rain flashover, improving the electrical safety of the composite crossarm.

[0077] In some embodiments, the tension connecting fitting 230 of the tension composite crossarm 200, the straight intermediate fitting 312 of the straight composite crossarm 300, the first substation end fitting 420 of the substation composite crossarm 400, the substation connecting fitting 1120 of the substation composite crossarm 1100, and the first end fitting 512 of the transformer crossarm 500 can all be provided with concave blocks on the side near the corresponding pole body. The shape of the concave block matches the shape of the outer surface of the pole body and can partially surround the pole body to increase the contact area at the connection between the corresponding composite crossarm and the pole body, thereby improving the connection strength between the two. Reinforcing ribs can be provided between the components of the above-mentioned connecting fittings as needed to improve the overall mechanical strength of the connecting fittings, thereby ensuring the reliable connection between the corresponding composite crossarm and the pole body. Furthermore, the above-mentioned connecting fittings can be integrally formed by casting or other methods, or they can be formed separately and then connected together by welding. The connection is reliable and the manufacturing is simple. As long as the connection strength between the components can be guaranteed, no specific limitations are made here.

[0078] In some implementations, the terminal clamp, tension clamp 235, straight clamp, and transformer clamp can all adopt the clamp structure in the prior art, as long as a stable connection with the pole can be achieved, and no specific restrictions are made here.

[0079] It is understood that the installation distances between the terminal pole 10, tension pole 20, and straight pole 30 in this application can be adjusted accordingly as needed; the overall lengths and assembly sequences of the terminal composite crossarm 100, tension composite crossarm 200, straight composite crossarm 300, transformer area composite crossarm 400, transformer area composite crossarm 1100, and transformer crossarm 500 can also be adjusted accordingly as needed; and the specifications of the terminal clamps and tension clamps can also be adjusted accordingly as needed.

[0080] In one application scenario, in a section of a composite power distribution line 1, at least one straight pole 30 is installed between two adjacent tension poles 20. For example, in a section of the composite power distribution line 1, a straight pole 30 is installed between every two adjacent tension poles 20, i.e., tension poles 20 and straight poles 30 are alternately installed; or in a section of the composite power distribution line 1, three straight poles 30 are installed between every two adjacent tension poles 20, i.e., one tension pole 20 and three straight poles 30 are alternately installed; or in a section of the composite power distribution line 1, different numbers of straight poles 30 are installed between any adjacent tension poles 20, which can be adjusted according to the power transmission requirements of the composite power distribution line 1, and no specific restrictions are imposed here. Because the straight pole 30 has a simple structure and is easy to install, and the tension poles 20 can effectively control the range of pole collapse and wire breakage, the reasonable design of the number and arrangement of tension poles 20 and straight poles 30 in the composite power distribution line 1 can improve installation efficiency and ensure power safety while ensuring power transmission.

[0081] In another application scenario, in a section of a composite power distribution line 1, at least one tension rod 20 is set at an angle to the conductors on both sides of the extension direction of the composite power distribution line 1. This is used to adjust the extension direction of the composite power distribution line 1 within a certain angle range to adapt to the surrounding environment and facilitate the routing of the composite power distribution line 1. For example, if the angle between the conductors on both sides of a tension rod 20 along the extension direction of the composite power distribution line 1 is 10°, that is, the angle between the conductor on one side of the tension rod 20 and the extension line of the conductor on the other side is 10°, then the extension direction of the composite power distribution line 1 can be twisted by 10° through this tension rod 20; or when two tension rods 20 are set adjacent to each other, the angle between the conductors on both sides of each tension rod 20 along the extension direction of the composite power distribution line 1 is 10°, that is, the angle between the conductor on one side of the two tension rods 20 and the extension line of the conductor on the other side along the extension direction of the composite power distribution line 1 is 20°, then the extension direction of the composite power distribution line 1 can be twisted by 20° through these two tension rods 20. It is understandable that the specific number of adjacent tension poles 20 and the range of adjustment of the conductor angle can be adjusted according to the power transmission requirements of the composite power distribution line 1 and the surrounding environment, and no specific restrictions are imposed here.

[0082] In some embodiments, the pole bodies of the terminal pole 10, tension pole 20, and straight pole 30 are all integrally formed using fiber-reinforced composite materials through a winding process. For example, fiberglass or aramid fibers impregnated with epoxy resin can be wound together. Compared with traditional cement poles and steel pipe poles, the pole bodies made of composite materials are significantly lighter while maintaining mechanical properties, which can greatly reduce transportation and installation costs, improve installation efficiency, and have better toughness, effectively preventing pole collapse accidents in strong wind environments such as coastal areas. They also have superior corrosion resistance, making them suitable for environments with high corrosion resistance requirements, such as coastal areas, inland saline soil areas, industrial areas, and areas prone to acid rain. Furthermore, their electrical insulation performance is superior, effectively preventing accidents such as lightning strike tripping and improving the overall lightning protection level of the composite power distribution line 1. In addition, the integral molding of the pole bodies through a winding process simplifies the manufacturing process and increases production efficiency.

[0083] In one application scenario, when the composite distribution line 1 is a single-circuit transmission line, three-phase conductors need to be connected to each distribution pole. In this case, the terminal pole 10 is equipped with a terminal composite crossarm 100, which includes a first terminal crossarm 110, two second terminal crossarms 120, a terminal connecting fitting 130, and a third terminal crossarm 140. The tension pole 20 is equipped with a tension composite crossarm 200, which includes a first tension crossarm 210, two second tension crossarms 220, tension connecting fittings 230, two tension insulators 240, and a third tension crossarm 250. The straight pole 30 is equipped with a straight composite crossarm 300, which includes a first straight crossarm 310 and a second straight crossarm 320. This configuration forms a single-circuit delta-arranged conductor connection, meeting the requirements of single-circuit transmission. The specific structure of each composite crossarm is as described above and will not be repeated here.

[0084] In a single-circuit composite distribution line 1 (taking the main line as an example), one end of the three-phase conductors is hung on a terminal pole 10, and the other end of the three-phase conductors is hung on another terminal pole 10 after passing through several tension poles 20 and several straight poles 30, forming the composite distribution line 1. When the end of the conductor is hung on the terminal composite crossarm 100 of the terminal pole 10, the ends of two of the three-phase conductors are hung on the terminal clamps connected by two second terminal crossarms 120, and are defined as the first phase conductor and the second phase conductor, respectively; the end of the other phase conductor is hung on the terminal clamp connected by the third terminal crossarm 140, and this phase conductor is located above the first phase conductor and the second phase conductor, and is defined as the third phase conductor. When the conductor is attached to the tension composite crossarm 200 of the tension pole 20, along the extension direction of the composite power distribution line 1, the first phase conductor and the second phase conductor located on one side of the tension pole 20 are respectively connected to the tension clamps connected to one end of the two second tension crossarms 220, and are connected by jumpers to the tension clamps connected to the other end of the corresponding second tension crossarms 220; the third phase conductor located on one side of the tension composite crossarm 200 is connected to the tension clamp connected to a tension insulator 240, and is connected to the tension clamp connected to another tension insulator 240 via a jumper at the top of the third tension crossarm 250, so that all three phase conductors are transitioned to the other side of the tension pole 20. When the conductors are attached to the straight composite crossarm 300 of the straight pole 30, the first phase conductor and the second phase conductor are directly attached to the straight end fittings 313 at both ends of the first straight crossarm 310, and the third phase conductor is directly attached to the second straight fitting 323 at the top of the second straight crossarm 320. This allows the three-phase conductors to transition from one side of the straight pole 30 to the other side along the extension direction of the composite power distribution line 1, ultimately making the conductors of the entire composite power distribution line 1 arranged in a triangular pattern.

[0085] In another application scenario, when the composite distribution line 1 is a double-circuit transmission line, six-phase conductors need to be connected to each distribution pole. In this case, three parallel terminal composite crossarms are spaced apart on the pole body of the terminal pole 10. Each terminal composite crossarm includes a first terminal crossarm 110, two second terminal crossarms 120, and a terminal connecting fitting 130. Similarly, three parallel tension composite crossarms are spaced apart on the pole body of the tension pole 20. Each tension composite crossarm includes a first tension crossarm 210, two second tension crossarms 220, and a tension connecting fitting 230. Three parallel straight composite crossarms are spaced apart on the pole body of the straight pole 30. Each straight composite crossarm includes a first straight crossarm 310. This arrangement forms a horizontally arranged conductor connection, meeting the requirements of double-circuit transmission. The specific structure of each composite crossarm is as described above and will not be repeated here. In other application scenarios, when the composite distribution line 1 needs to connect more circuits of conductors, the number of composite crossarms can be increased according to requirements.

[0086] In a double-circuit composite distribution line 1 (taking the main line as an example), one end of the six-phase conductors is hung on a terminal pole 10, and the other end of the six-phase conductors is hung on another terminal pole 10 after passing through several tension poles 20 and several straight poles 30, forming the composite distribution line 1. The six-phase conductors include three sets of conductors, which are hung vertically at intervals on the composite crossarms of each distribution pole. Each set of conductors includes two phase conductors. The three sets of conductors are hung in the same way. Taking one set of conductors as an example, when the end of the conductor is hung on the terminal pole 10, the ends of the two-phase conductors are hung on the terminal clamps connected to the two second terminal crossarms 120 of the terminal composite crossarm. When the conductor is hung on the tension composite crossarm of the tension pole 20, along the extension direction of the composite power distribution line 1, the two-phase conductors on one side of the tension pole 20 are respectively connected to the tension clamps connected to one end of the two second tension crossarms 220 of the tension composite crossarm, and jumper wires are connected to the tension clamps connected to the other end of the corresponding second tension crossarm 220, so that the two-phase conductors... All transition to the other side of the tension pole; when the conductor is hung on the straight composite crossarm of the straight pole 30, the two phase conductors are directly hung on the straight end fittings 313 at both ends of the first straight crossarm 310 of the straight composite crossarm, so that the two phase conductors transition from one side of the straight pole 30 to the other side along the extension direction of the composite power distribution line 1. The aforementioned terminal composite crossarm, tension composite crossarm, and straight composite crossarm used to hang the same set of conductors are roughly at the same horizontal height. After the three sets of conductors are hung on the corresponding composite crossarms on each power distribution pole in the above manner, the conductors of the entire composite power distribution line 1 are finally arranged in a horizontal manner.

[0087] The technical content and features of this application have been disclosed above. However, it is understood that, based on the inventive concept of this application, those skilled in the art can make various changes and improvements to the above-described structure and materials, including combinations of the technical features disclosed or claimed herein, and explicitly including other combinations of these features. All such modifications and / or combinations fall within the technical field to which this application pertains and are within the scope of protection of the claims of this application.

Claims

1. A composite power distribution line, comprising a plurality of power distribution poles spaced apart along the extension direction of the composite power distribution line and conductors suspended on the power distribution poles, characterized in that, The plurality of the aforementioned distribution poles include at least two terminal poles, a plurality of tension poles, and a plurality of straight poles. The terminal poles are located at the ends of the composite distribution line, the straight poles and the tension poles are located in the middle of the composite distribution line, a terminal composite crossarm is provided at the top of the terminal pole, a tension composite crossarm is provided at the top of the tension pole, and a straight composite crossarm is provided at the top of the straight pole. The conductors are hung on the terminal composite crossarms, the tension composite crossarms, and the straight composite crossarms along the extension direction of the composite distribution line to form the composite distribution line. The terminal composite crossarm includes: First terminal crossarm; Two second terminal crossarms, one end of each second terminal crossarm is connected to both ends of the first terminal crossarm, and the other end of the second terminal crossarm is used to connect to the wire clamp. The length direction of the second terminal crossarm and the length direction of the first terminal crossarm are in the same horizontal plane and perpendicular to each other. The terminal connection fitting is provided, and the middle part of the first terminal crossarm is connected to the terminal connection fitting. The third terminal crossarm has one end connected to the terminal connection hardware and the other end used to connect to the wire clamp. The length of the third terminal crossarm is set in the vertical direction.

2. The composite power distribution line as described in claim 1, characterized in that, The pole bodies of the terminal pole, the straight pole, and the tension pole are all integrally formed using fiber-reinforced composite materials through a winding process.

3. The composite power distribution line as described in claim 1, characterized in that, At least one of the terminal poles is provided with a plurality of transformer composite crossarms and transformer composite crossarms arranged in parallel at intervals, and the transformer composite crossarms are located between the terminal composite crossarms and the transformer composite crossarms. The transformer composite crossarms are used to install down conductor crossarms, knife switches, fuses or surge arresters, and the transformer composite crossarms are used to install transformers.

4. The composite power distribution line as described in claim 3, characterized in that, At least one of the terminal poles is arranged adjacent to one of the straight poles, and the transformer composite crossarm and several of the substation composite crossarms are arranged across the middle of the terminal pole and the adjacent straight pole.

5. The composite power distribution line as described in claim 4, characterized in that, Several of the aforementioned composite crossarms are used to install down conductor crossarms, fuses, and surge arresters in sequence from top to bottom. The conductors are connected from the top of the terminal composite crossarm downwards to the down conductor crossarm, the fuse, the surge arrester, and the transformer.

6. The composite power distribution line as described in claim 5, characterized in that, Among the several composite crossarms of the transformer substation, at least one composite crossarm is used to install a knife switch. The knife switch is located between the down conductor crossarm and the fuse. The conductor is connected in sequence to the down conductor crossarm, the knife switch, the fuse, the surge arrester, and the transformer.

7. The composite power distribution line as described in claim 1, characterized in that, In one section of the composite power distribution line, at least one straight rod is provided between two adjacent tension rods.

8. The composite power distribution line as described in claim 1, characterized in that, In one section of the composite power distribution line, at least one of the tension rods is arranged at an angle to the conductors on both sides of the extension direction of the composite power distribution line.

9. The composite power distribution line as described in claim 1, characterized in that, The linear composite crossarm includes a first linear crossarm and a second linear crossarm, wherein the second linear crossarm is connected above the middle part of the first linear crossarm, and the length direction of the second linear crossarm is arranged in the vertical direction.

10. The composite power distribution line as described in claim 4, characterized in that, The composite crossarm of the transformer area includes: The first core rod; Two end fittings for the first platform area are respectively connected to the two ends of the first platform area core rod and are used to connect the rod body. At least one intermediate fitting for the first stage area, the intermediate fitting for the first stage area being connected to the middle of the mandrel in the first stage area; A first-zone insulation layer covers at least a portion of the outer peripheral surface of the first-zone core rod.

11. The composite power distribution line as described in claim 3, characterized in that, The composite crossarm of the transformer area includes: Second core bar; A platform connecting fitting is connected to the middle of the second platform core rod and is used to connect the rod body; Two end fittings for the second stage area are respectively connected to the two ends of the core rod of the second stage area; At least one second-section intermediate fitting, the second-section intermediate fitting is connected to the middle of the second-section mandrel, and the second-section intermediate fitting is located between the section connecting fitting and the second-section end fitting; A second insulating layer covers at least a portion of the outer peripheral surface of the second-region core rod.

12. The composite power distribution line as described in claim 1, characterized in that, The tension-resistant composite crossarm includes: First tension crossarm; Two second tension crossarms are provided, with the middle portions of the two second tension crossarms respectively connected to the two ends of the first tension crossarm. The two ends of the second tension crossarms are used to connect wire clamps. The length direction of the second tension crossarms is in the same horizontal plane as the length direction of the first tension crossarm and is perpendicular to each other. Tension connecting hardware, the middle part of the first tension crossarm is connected to the tension connecting hardware; Two tension insulators, one end of each tension insulator is connected to both sides of the tension connecting hardware, and the other end of each tension insulator is used to connect to a clamp. The length direction of each tension insulator is parallel to the length direction of the second tension crossarm. The third tension crossarm is connected at one end to the tension connecting hardware, and at the other end is used to hang the conductor. The length of the third tension crossarm is set in the vertical direction.

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