Lightning protection distribution line tower

Abstract

The invention belongs to the technical field of power distribution lines, and discloses a lightning protection power distribution line pole tower which comprises a pole tower support, a metal cross arm is arranged on the pole tower support, an insulator is fixedly installed on the metal cross arm, a wire is arranged on the insulator, and a lightning protection lifting top cap is arranged at the top of the pole tower support. Top cap horizontal angle steel is arranged on the top of the lightning protection lifting top cap, through the arrangement of the top cap horizontal angle steel, the overhead ground wires and the ground wires, the modularized lightning protection lifting top cap is conveniently achieved, the component is in a T shape, the two overhead ground wires are erected above a line, the probability that lightning strikes an insulated wire is reduced, and safety and reliability are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of distribution lines, and particularly relates to a lightning protection distribution line tower. Background Art

[0002] Distribution line towers are steel structures, concrete structures or composite material structures used in the power system to support overhead distribution lines (usually at voltage levels of 10 kV and 35 kV), and are an important part of the distribution network. They undertake functions such as wire erection, insulation fixation, and lightning protection, ensuring the safe and stable transmission of electrical energy to the user end. A lightning protection distribution line tower is a special tower structure used in the power transmission system to support overhead lines and has a lightning protection function, mainly used to reduce the damage of lightning strikes to the power system and ensure power supply reliability.

[0003] For example, the invention with the publication number CN110350462A discloses an intelligent lightning protection distribution line tower, which includes a tower, an overhead ground wire, a ground wire support, an insulating tower head, and a tower ground wire; the overhead ground wire is an optical fiber cable, the outer layer of the optical fiber cable is a metal stranded wire, and the inner layer is an optical fiber. It erects an optical fiber cable on the distribution line tower. The outer layer being a metal stranded wire has the effect of shielding lightning strikes and coupling and reducing lightning current, and the optical fiber has a communication function. At the same time, using the photoelectric effect of the optical fiber, it non-contact monitors the load current, fault current, and tower vibration of the wire, etc., to realize the intelligent perception of the distribution line. This invention sets an insulating tower head and an overhead ground wire. The insulating tower head greatly improves the insulation level of the tower, and the overhead ground wire has the function of shielding lightning strikes, thereby greatly improving the lightning withstand level of the distribution line tower.

[0004] In existing devices, 10 kV distribution lines mostly use overhead insulated wires. Due to the relatively thin insulation layer, it is easy to be punctured under the action of lightning overvoltage, resulting in line tripping and affecting power supply reliability. Currently, common lightning protection measures mainly include: installing lightning arresters, using insulating cross arms, and erecting overhead ground wires (lightning protection wires), etc. To improve the lightning protection effect, some technologies adopt a "raised top hat" structure, that is, an extension bracket is installed on the top of the existing tower. However, the existing solutions still have the following problems: the protection range of the single ground wire design is insufficient. Using a single overhead ground wire, it is difficult to completely cover multiple circuits, and the reduction of the lightning tripping rate is limited; the obvious increase in the tower height leads to an increase in the bending moment of the pole body, affecting the wind resistance performance and structural safety; the adaptability is poor. Most of the existing top hats are fixed designs and are difficult to adapt to different pole types (such as cement poles, steel pipe poles, narrow-based towers, etc.), and customized transformation is required during installation, resulting in low construction efficiency. Summary of the Invention

[0005] To solve the problems raised in the above background art, the present invention provides a lightning protection distribution line tower.

[0006] The present invention provides the following technical solution: A lightning protection distribution line pole tower, including a pole tower support, a metal cross arm is provided on the pole tower support, an insulator is fixedly installed on the metal cross arm, a wire is provided on the insulator, and a lightning protection elevation top cap is provided at the top of the pole tower support; The lightning protection elevation top cap includes a heightened channel steel, a top cap horizontal angle steel is provided at the top of the heightened channel steel, and the bottom of the heightened channel steel is connected to the pole tower support through a hoop; Overhead ground wires are respectively provided at both ends of the top cap horizontal angle steel, a pair of upper leads are respectively led out from the two overhead ground wires, a pair of the upper leads are respectively connected to connection terminals, a ground wire is provided at the bottom of the connection terminals, a wiring terminal is provided on the metal cross arm, a lower lead is connected to the bottom of the wiring terminal, a parallel groove clamp is provided at the connection of the lower lead and the ground wire, and the ground wire is used for grounding.

[0007] Preferably, it further includes short lightning rods, the short lightning rods are provided at both ends of the metal cross arm, an installation mechanism for quickly fixing the short lightning rods is provided on the metal cross arm, and the short lightning rods and the installation mechanism cooperate to directly intercept the side-striking lightning, making up for the protection dead angle of the traditional lightning protection wire.

[0008] Preferably, the installation mechanism includes installation boxes fixedly provided at the edges of both ends of the metal cross arm, a first clamping block and a second clamping block slidably provided inside the installation boxes, a connecting frame slidably provided on one side of the installation box close to the second clamping block, sliding rods fixedly provided on both sides of the connecting frame and sleeved with the first clamping block and the second clamping block, and a driving assembly located between the second clamping block and the connecting frame for driving the first clamping block and the second clamping block to clamp and fix the short lightning rod.

[0009] Preferably, a rhombic accommodating hole is formed between the first clamping block and the second clamping block, and the inner sides of the first clamping block and the second clamping block are made of rubber material.

[0010] Preferably, fixing pieces are fixedly provided at the outer ends of both sides of the two sliding rods close to the first clamping block, and the two fixing pieces are used for limiting the first clamping block.

[0011] Preferably, the driving assembly includes two connecting blocks fixedly provided on the sides of the second clamping block and the connecting frame close to each other, a driving block located between the two connecting blocks, a screw rod screwed at the center of the driving block, a connecting plate fixedly provided at the bottom of the installation box, and a knob fixedly provided at the top of the screw rod.

[0012] Preferably, both of the two connecting blocks are triangular, an inclined groove is formed at the center of the driving block, and the driving block can push the connecting blocks on both sides to move.

[0013] Preferably, the screw rod is rotatably connected to the connecting plate, the knob is used to drive the screw rod to rotate synchronously, sliding grooves are formed on both sides of the bottom of the installation box, and the first clamping block, the second clamping block and the connecting frame all slide along the sliding grooves.

[0014] Preferably, a fixing block is fixedly arranged at the bottom of the installation box, and two groups of springs are arranged between the first clamping block and the second clamping block, and the two groups of springs are located on both sides of the fixing block.

[0015] In the working process of the present invention, by setting the top hat horizontal angle steel, the overhead ground wire and the grounding wire, it is convenient to realize the modular lightning protection elevated top hat. The component is in a T shape. Two (GJ-35) overhead ground wires are erected above the line, reducing the probability of lightning hitting the insulated wire. By installing a T-shaped top hat structure at the top of the pole tower bracket, double overhead ground wires are erected at both ends of the horizontal angle steel, and a complete lightning protection channel is formed by connecting the grounding wire through the upper lead wire, the connecting terminal and the lower lead wire. This structure adopts a modular design, adapts to various pole types such as cement poles and steel pipe poles. By setting double ground wires, the probability of lightning hitting the wire is reduced, and at the same time, the height of the pole head is optimized, improving the installation convenience and coverage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the structural diagram of the present invention, Figure 2 is the structural schematic diagram of the optimized implementation mode of the present invention; Figure 3 is the structural cooperation relationship schematic diagram of the installation mechanism and the short lightning rod of the present invention; Figure 4 is the cross-sectional structural schematic diagram of the installation box of the present invention; Figure 5 For the present invention Figure 4 is the enlarged schematic diagram of the partial structure at A in Figure 6 is the structural cooperation relationship schematic diagram of the first clamping block, the second clamping block and the driving component of the present invention; Figure 7 is the structural cooperation relationship schematic diagram of the driving component and the spring of the present invention; Figure 8 is the top view of the installation mechanism of the present invention; In the figure: 1. Pole tower bracket; 11. Insulator; 12. Metal cross arm; 2. Short lightning rod; 3. Installation mechanism; 31. Installation box; 311. Sliding groove; 32. First clamping block; 33. Second clamping block; 34. Connecting frame; 35. Slide bar; 351. Fixed piece; 36. Driving component; 361. Connecting block; 362. Driving block; 3621. Inclined groove; 363. Screw rod; 364. Connecting plate; 365. Knob; 37. Fixed block; 38. Spring; 41. Top hat horizontal angle steel; 42. Overhead ground wire; 43. Upper lead wire; 44. Connection terminal; 45. Wiring terminal; 46. Lower lead wire; 47. Parallel groove clamp; 48. Ground wire; 49 is a heightened channel steel, and 50 is a hoop. Detailed implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figure 1 shown, the present invention provides a lightning protection distribution line tower, including a tower support 1, a metal cross arm 12 is arranged on the tower support 1, an insulator 11 is fixedly installed on the metal cross arm 12, a wire is arranged on the insulator 11, and a lightning protection raised top hat is arranged at the top of the tower support 1; The lightning protection raised top hat includes a heightened channel steel 49, a top hat horizontal angle steel 41 is arranged at the top of the heightened channel steel, and the bottom of the heightened channel steel is connected to the tower support 1 through a hoop 50; Overhead ground wires 42 are respectively arranged at both ends of the top hat horizontal angle steel 41, a pair of upper lead wires 43 are respectively led out from the two overhead ground wires 42, a pair of upper lead wires 43 are respectively connected to a connection terminal 44, a ground wire 48 is arranged at the bottom of the connection terminal 44, a wiring terminal 45 is arranged on the metal cross arm 12, a lower lead wire 46 is connected to the bottom of the wiring terminal 45, a parallel groove clamp 47 is arranged at the connection part of the lower lead wire 46 and the ground wire 48, and the ground wire 48 is used for grounding.

[0019] Adopting the above scheme: By installing the tower support 1 at the location where it is needed, a lightning protection raised top hat is installed on the top of the tower support 1. The overhead ground wires 42 at both ends of the top hat horizontal angle steel 41 respectively lead out upper lead wires 43. A pair of upper lead wires 43 are connected to the ground wire 48 through a connection terminal 44. The insulator 11 on the metal cross arm 12 is connected to the wire. The metal cross arm 12 is connected to the lower lead wire 46 through a wiring terminal 45. The lower lead wire 46 and the ground wire 48 are connected through a parallel groove clamp 47. The ground wire 48 is grounded. The modular lightning protection raised top hat is in a T shape. Two GJ-35 steel stranded wires are used as overhead ground wires and are erected above the line to reduce the probability of lightning hitting the insulated wire. The modular lightning protection raised top hat is divided into a main body and various functional components, which is convenient to install, suitable for various pole types of cement poles and steel poles of overhead lines. The designed height meets the lightning protection angle requirements of the ground wire for all phase wires. At the same time, a double ground wire form is provided, which can reduce the height of the pole head, is convenient to install, and has a high coverage rate.

[0020] As Figure 2 and Figure 8 shown, it further includes a short lightning rod 2, which is arranged at both ends of the metal cross arm 12. An installation mechanism 3 for quickly fixing the short lightning rod 2 is provided on the metal cross arm 12. The short lightning rod 2 and the installation mechanism 3 cooperate to directly intercept the side-striking lightning, making up for the protection dead angle of the traditional lightning protection wire.

[0021] During use, in order to avoid the problem that the existing lightning protection wire has a protection dead angle during lightning protection of the distribution line and it is difficult to directly intercept the side-striking lightning, the short lightning rod 2 can be installed at the edge of the metal cross arm 12 by using the installation mechanism 3 to achieve more comprehensive lightning protection.

[0022] As Figure 4 shown, the installation mechanism 3 includes installation boxes 31 fixedly arranged at both ends of the metal cross arm 12, a first clamping block 32 and a second clamping block 33 slidably arranged inside the installation box 31, a connecting frame 34 slidably arranged on one side of the installation box 31 close to the second clamping block 33, sliding rods 35 fixedly arranged on both sides of the connecting frame 34 and sleeved with the first clamping block 32 and the second clamping block 33, and a driving component 36 located between the second clamping block 33 and the connecting frame 34 for driving the first clamping block 32 and the second clamping block 33 to clamp and fix the short lightning rod 2; A rhombus-shaped accommodation hole is formed between the first clamping block 32 and the second clamping block 33. The inner sides of the first clamping block 32 and the second clamping block 33 are made of rubber material. Fixed pieces 351 are fixedly arranged at the outer ends of the two sliding rods 35 close to the first clamping block 32, and the two fixed pieces 351 are used to limit the first clamping block 32.

[0023] By inserting the short lightning rod 2 into the slot opened at the top of the installation box 31, wherein the top cover of the installation box 31 can be opened. By using the driving component 36 to adjust the distance between the second clamping block 33 and the connecting frame 34, when the short lightning rod 2 is placed, the second clamping block 33 and the connecting frame 34 can be adjusted to move away from each other, thereby driving the sliding rods 35 to synchronously approach one side of the connecting frame 34. Thus, through the cooperation of the fixed pieces 351, the first clamping block 32 is driven to move synchronously, and then the first clamping block 32 and the second clamping block 33 are driven to move towards each other and approach the short lightning rod 2 at the center, so that the rubber material sides of the two are in contact with the short lightning rod 2. Since rubber is an insulating material and is suitable for this device, the installation and fixation of the short lightning rod 2 are realized.

[0024] As Figures 5 to 8As shown in the figure, the driving assembly 36 includes two connecting blocks 361 fixedly arranged on the sides close to each other of the second clamping block 33 and the connecting frame 34, a driving block 362 located between the two connecting blocks 361, a screw rod 363 screwed to the center of the driving block 362, a connecting plate 364 fixedly arranged at the bottom of the mounting box 31, and a knob 365 fixedly arranged at the top of the screw rod 363; Both of the two connecting blocks 361 are triangular. An inclined groove 3621 is formed at the center of the driving block 362. The driving block 362 can push the connecting blocks 361 on both sides to move. The screw rod 363 is rotatably connected to the connecting plate 364. The knob 365 is used to drive the screw rod 363 to rotate synchronously. Sliding grooves 311 are formed on both sides of the bottom of the mounting box 31. The first clamping block 32, the second clamping block 33, and the connecting frame 34 all slide along the sliding grooves 311. A fixing block 37 is fixedly arranged at the bottom of the mounting box 31. Two groups of springs 38 are arranged between the first clamping block 32 and the second clamping block 33. The two groups of springs 38 are located on both sides of the fixing block 37.

[0025] The driving assembly 36 is used to realize the reasonable driving of the second clamping block 33 and the connecting frame 34, so that the two move towards each other. Specifically, by rotating the knob 365, the screw rod 363 is driven to rotate, and then the driving block 362 screwed to it moves up and down. Since the two sides of the driving block 362 are designed with inclined grooves and the connecting blocks 361 are triangular, when it moves downward, it will squeeze the connecting blocks 361 on both sides to drive the connecting blocks 361 on both sides to move away from each other. At this time, the second clamping block 33 and the connecting frame 34 move away from each other. The connecting frame 34 drives the sliding rod 35 and the first clamping block 32 to move to the same side. At this time, the springs 38 are in a compressed state, and then the effect of the first clamping block 32 and the second clamping block 33 moving closer to each other for clamping is realized, thereby realizing the quick installation and fixation of the short lightning rod 2. When the short lightning rod 2 needs to be disassembled and repaired, the screw rod 363 can be reversed to drive the driving block 362 to move upward. At this time, the connecting blocks 361 on both sides lose the extrusion force and reset under the action of the springs 38, driving the connecting frame 34 to reset synchronously, thereby facilitating the removal of the short lightning rod 2 for replacement.

[0026] When using this lightning protection device in the present invention, first, a modular T-shaped lightning protection elevation top hat needs to be installed on the top of the tower support 1. The horizontal angle steel at both ends of the top hat respectively leads out overhead ground wires (using GJ-35 type steel strands) to form two upper leads. These two upper leads are reliably connected to the grounding system through special connecting terminals; at the same time, the insulators 11 installed on the metal cross arm 12 are used to fix the conductors, and the metal cross arm 12 itself is connected to the lower lead through a terminal. The lower lead is then electrically connected to the main grounding wire through a parallel groove clamp and finally connected to the grounding device.

[0027] The present invention uses a modular T-shaped raised top hat structure. By erecting two GJ-35 overhead ground wires above the pole tower, a protection area is effectively formed, significantly reducing the probability of lightning directly hitting the insulated wire.

[0028] Meanwhile, during the installation of the short lightning rod, the unique drive assembly 36 drives the second clamping blocks 33 and the connecting frames 34 on both sides to move outwards. At the same time, through mechanical linkage, the sliding rod 35 pushes the first clamping block 32 towards the second clamping block 33, thus realizing the quick and stable clamping installation of the short lightning rod 2. Installing the short lightning rod 2 on the side of the pole tower. This design can effectively intercept the side flashover lightning that is difficult to protect by traditional lightning protection wires, not only solving the problem of the protection blind area existing in traditional lightning protection wires, but also avoiding the high cost brought by the full-line erection of lightning protection wires, achieving the best balance between economy and protection effect. The entire system, through the coordinated cooperation of the upper lead wire, the lower lead wire and the grounding device, constructs a multi-level and all-round lightning protection system, greatly improving the lightning protection reliability of the pole tower.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightning protection distribution line tower, characterized in that: include: A pole tower support (1), wherein a metal cross arm (12) is provided on the pole tower support (1), an insulator (11) is fixedly mounted on the metal cross arm (12), a conductor is provided on the insulator (11), and a lightning protection raising cap is provided on the top of the pole tower support (1); The lightning protection raised top cap comprises a raised channel steel (49), the top of the raised channel steel is provided with a top cap horizontal angle steel (41), and the bottom of the raised channel steel is connected to the pole tower support (1) via a hoop (50); Overhead ground wires (42) are respectively arranged at both ends of the top cap horizontal angle steel (41), and a pair of upper leads (43) are respectively led out from the two overhead ground wires (42), and the pair of upper leads (43) are respectively connected to the connection terminals (44), and a ground wire (48) is arranged at the bottom of the connection terminals (44). A wiring terminal (45) is arranged on the metal cross arm (12), and a lower lead (46) is connected to the bottom of the wiring terminal (45), and a parallel groove wire clamp (47) is arranged at the connection between the lower lead (46) and the ground wire (48), and the ground wire (48) is used for grounding.

2. A lightning protection distribution line tower according to claim 1, characterized in that: It also comprises a short lightning rod (2), wherein the short lightning rod (2) is arranged at two ends of a metal cross arm (12), and a mounting mechanism (3) for fixing the short lightning rod (2) is provided on the metal cross arm (12).

3. A lightning protection distribution line tower according to claim 2, characterized in that: The mounting mechanism (3) comprises a mounting box (31) arranged at the edges of both ends of the metal cross arm (12), a first clamping block (32) and a second clamping block (33) arranged inside the mounting box (31), a connecting frame (34) arranged inside the mounting box (31) on one side close to the second clamping block (33), sliding rods (35) arranged on both sides of the connecting frame (34) and slidably sleeved with the first clamping block (32) and the second clamping block (33), and a driving assembly (36) located between the second clamping block (33) and the connecting frame (34) and used for driving the first clamping block (32) and the second clamping block (33) to clamp and fix the short lightning rod (2).

4. A lightning protection distribution line tower according to claim 3, characterized in that: A diamond-shaped accommodating hole is formed between the first clamping block (32) and the second clamping block (33), and rubber material is provided inside the first clamping block (32) and the second clamping block (33).

5. A lightning protection distribution line tower according to claim 3, characterized in that: The two sliding rods (35) are both fixedly provided with fixing plates (351) at the outer ends close to the first clamping block (32), and the two fixing plates (351) are used to limit the first clamping block (32).

6. A lightning protection distribution line tower according to claim 3, characterized in that: The driving assembly (36) comprises two connecting blocks (361) fixedly arranged on one side of the second clamping block (33) and the connecting frame (34) close to each other, a driving block (362) located between the two connecting blocks (361), a screw rod (363) screwed at the center of the driving block (362), a connecting plate (364) fixedly arranged at the bottom of the installation box (31), and a knob (365) fixedly arranged at the top of the screw rod (363).

7. A lightning protection distribution line tower according to claim 6, characterized in that: The two connecting blocks (361) are both triangular in shape, and an oblique groove (3621) is provided at the center of the driving block (362). The driving block (362) is used to push the connecting blocks (361) on both sides to move.

8. A lightning protection distribution line tower according to claim 7, characterized in that: The screw rod (363) is rotatably connected to the connecting plate (364), and the knob (365) is used to drive the screw rod (363) to rotate synchronously.

9. A lightning protection distribution line tower according to claim 6, characterized in that: Both sides of the bottom of the installation box (31) are provided with sliding grooves (311), and the first clamping block (32), the second clamping block (33) and the connecting frame (34) all slide along the sliding grooves (311).

10. A lightning protection distribution line tower according to claim 6, characterized in that: A fixing block (37) is fixedly disposed at the bottom of the installation box (31), and two groups of springs (38) are disposed between the first clamping block (32) and the second clamping block (33), and the two groups of springs (38) are located on both sides of the fixing block (37).

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