Power transmission steel tube tower with lightning arrester

Abstract

The power transmission steel tube tower comprises a tower body, a lightning rod is arranged on the top of the tower body, a wire is arranged on the outer side of the tower body, one end of the wire is connected with a shell installed on power transmission equipment, and the other end of the wire is connected with the ground through a grounding device. A plurality of conductive cavities communicated with the ground are arranged in the grounding device, binding posts are arranged in the cavities in a sliding mode, one end of each binding post is connected with a wire, the other end of each binding post is hollow and fixedly connected with a sliding seat, the sliding seat penetrates through and is in threaded connection with a screw in a matched mode, and a knob is installed at one end of each screw. An air channel is formed in one end, close to the binding post, of the cavity and provided with a fan used for keeping a wiring part clean. The top of the grounding device is provided with an installation port, and a metal rod made of active metal is inserted into the installation port and provided with a cover body to prevent rainwater from invading. A sleeve is arranged on one side of the tower body, and the wire is arranged in the sleeve in a penetrating mode. According to the design, a wiring part is effectively prevented from being infected by rainwater or dust, and relatively low grounding resistance is kept.

Description

Technical Field

[0001] This utility model relates to the technical field of power transmission steel pipe towers, specifically to a power transmission steel pipe tower with a lightning protection device. Background Technology

[0002] With the continuous development of power systems, the construction of transmission lines is increasing. Transmission steel pipe towers are primarily used to deliver high-voltage electricity to every household that needs electricity. As a crucial component of transmission lines, their safety performance directly affects the safe operation of the entire power grid. The transmission of electricity through transmission steel pipe towers is mainly accomplished by high-voltage power lines and voltage towers, and there are also underground transmission lines, but these are difficult to construct and costly, and are only used in special circumstances.

[0003] When assembling power transmission steel pipe towers, lightning protection is also taken into consideration. Because these towers are designed to be quite high, some even located on mountains, they are inevitably susceptible to lightning strikes during rainy weather. If a transmission line is struck by lightning, it can affect the voltage of the entire transmission system or cause irreversible damage to the transmission line and connected equipment. Therefore, to protect transmission lines from lightning strikes, lightning protection devices are installed on the towers. High-voltage and low-voltage lightning protection need to be installed separately. For the high-voltage side, traditional lightning protection devices use overhead ground wires (lightning conductors) or lightning rods connected to the tower body. For the low-voltage side, a conductor connects the neutral point to the transformer's metal casing, and this conductor must be connected to the grounding device. Traditionally, the conductor is first connected to the iron plate via terminals, and the iron plate is then bolted to the grounding device. After prolonged use, corrosion of the bolts or iron plate, or dust accumulation at the joints, can increase the grounding resistance. When the overcurrent caused by a lightning strike flows through the junction of the grounding device and the iron plate, it generates a brief but strong overvoltage, which may cause the breakdown of some weak insulation links in the power line. Utility Model Content

[0004] The purpose of this utility model is to provide a power transmission steel pipe tower with a lightning protection device to improve its protection performance in thunderstorms and reduce the damage of lightning strikes to the power system.

[0005] The technical solution adopted by this utility model to solve the above problems is: a power transmission steel pipe tower with a lightning protection device, including a tower body, a lightning rod at the top of the tower body, a conductor on the outside of the tower body, one end of the conductor being connected to the outer shell of the power transmission equipment, and the other end being connected to the ground through a grounding device. The grounding device is provided with multiple conductive cavities that are connected to the ground. A terminal is slidably arranged in the cavity. One end of the terminal is connected to the conductor, and the other end is hollow and connected to a slide block. A screw rod is threaded through and threadedly connected to the slide block. A knob is installed at one end of the screw rod.

[0006] Preferably, the cavity has an air duct near the terminal block, and the air duct is equipped with a fan. The terminal block includes a sliding part and a wiring part. The outer contour of the sliding part is adapted to the cavity, and the sliding part is provided with a groove that is adapted to slide with the protrusion of the cavity. The thickness of the wiring part is less than that of the sliding part. A wiring bolt is provided on one side of the wiring part. The wiring bolt is threaded and adapted to a wiring nut. The end of the wire is clamped between the wiring nut and the wiring part.

[0007] Preferably, the grounding device has an installation port at the top that is in communication with the cavity, and a metal rod is inserted into the installation port. The metal rod is made of a reactive metal.

[0008] Preferably, the metal rod has a cover with a curved profile that is higher in the middle and lower around the edges, and the cover has a lifting part.

[0009] Preferably, a sleeve is provided on one side of the tower body, and the wires are run through the sleeve.

[0010] Preferably, the bottom of the grounding device is through and fixed to the tower base of the tower body.

[0011] Preferably, the grounding device has a downwardly sloping edge on its side.

[0012] Preferably, the housing, slide, knob, sleeve, and cover of the grounding device are all made of insulating material.

[0013] Compared with the prior art, this utility model has the following advantages and effects:

[0014] This utility model discloses a grounding device for a power transmission steel pipe tower with a lightning protection system. The grounding device has multiple conductive cavities connected to the ground, and terminals are slidably mounted within these cavities. A knob is rotatably connected to the housing of the grounding device. One end of the knob is fixedly connected to a screw rod, which is threadedly connected to a slide block. The slide block is connected to the hollow end of the terminal block. Turning the knob drives the screw rod to rotate, causing the slide block to move the terminal block along the cavity. When connecting wires, the terminal block extends out of the cavity; after the wire connection is complete, the terminal block is retracted into the cavity. Compared to the traditional method of connecting wires to the grounding device using an iron plate, this embodiment uses cavities to conceal the connection point within the grounding device, effectively protecting the connection point from rainwater or dust contamination, keeping the connection point clean, and maintaining a low grounding resistance (less than 4Ω). This prevents overcurrent caused by poor contact at the connection point, which could lead to increased grounding resistance and overvoltage at the connection point during a lightning strike, causing breakdown of weak insulation links in the power line. Attached Figure Description

[0015] Figure 1This is a perspective view of a power transmission steel pipe tower with a lightning protection device according to an embodiment of this utility model.

[0016] Figure 2 This is a perspective view of the grounding device according to an embodiment of the present invention.

[0017] Figure 3 This is an embodiment of the present utility model. Figure 2 Sectional view of AA.

[0018] Figure 4 This is an embodiment of the present utility model. Figure 2 A cross-sectional view of BB.

[0019] Figure 5 This is a schematic diagram of the terminal block structure according to an embodiment of the present invention.

[0020] Attached drawings: Tower body 1, Lightning rod 11, Transmission equipment 12, Bushing 13, Tower base 14, Conductor 2, Grounding device 3, Cavity 31, Raised bar 311, Air duct 32, Fan 33, Mounting port 34, Metal rod 35, Cover 36, Lifting part 361, Edge 37, Terminal post 4, Sliding part 41, Slide groove 411, Wiring part 42, Wiring bolt 43, Wiring nut 44, Slide seat 45, Screw 46, Knob 47. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0022] Example: See Figure 1 - Figure 5 In this embodiment, a power transmission steel pipe tower with a lightning protection device is provided. Specifically, it is used to provide a power transmission steel pipe tower that can effectively prevent lightning from directly striking the power transmission line and its equipment in high-voltage power transmission lines in areas with frequent lightning, and to prevent overvoltage caused by lightning induction from damaging the power transmission line and its equipment. Specifically, it includes: a tower body 1, a lightning rod 11 at the top of the tower body 1, a conductor 2 on the outside of the tower body 1, one end of the conductor 2 being connected to the outer shell of the power transmission equipment 12, and the other end being connected to the ground through a grounding device 3. The grounding device 3 is provided with multiple conductive cavities 31 that are connected to the ground. A terminal post 4 is slidably arranged in the cavity 31. One end of the terminal post 4 is connected to the conductor 2, and the other end is hollow and connected to a slide block 45. A screw rod 46 is threaded through and threadedly connected to the slide block 45. A knob 47 is installed at one end of the screw rod 46.

[0023] Specifically, in this embodiment, the tower body 1 serves as the main supporting structure, bearing the weight of power transmission cables, lightning protection devices (lightning rods 11), and various power transmission equipment 12 (control boxes, transformers), etc. The lightning rods 11 are installed on the top of the tower body 1 to attract and guide lightning current to the tower body 1 and the ground. To further protect the power transmission equipment 12 (taking a transformer as an example), one end of the conductor 2 is connected to the outer casing of the power transmission equipment 12 installed on the tower body 1, and the other end is connected to the ground through the grounding device 3 to ensure that the induced current can be effectively conducted to the ground. The grounding device 3 has multiple conductive cavities 31 that are connected to the ground, and terminals 4 are slidably installed in these cavities 31. The knob 47 is rotatably connected to the housing of the grounding device 3. One end of the knob 47 is fixedly connected to the screw 46. The screw 46 is threadedly connected to the slide 45. The slide 45 is connected to the hollow end of the terminal 4. By turning the knob 47, the screw 46 is driven to rotate, thereby causing the slide 45 to move the terminal 4 along the direction of the cavity 31. When connecting the wire 2, the terminal 4 is extended outside the cavity 31. After the wire 2 is connected, the terminal 4 is retracted into the cavity 31. Compared to the traditional method of connecting the conductor 2 and the grounding device 3 using an iron plate, this embodiment uses a cavity 31 to hide the connection point of the conductor 2 and the grounding device 3 inside the cavity 31 of the grounding device 3. This effectively protects the wiring part 42 from rainwater or dust, keeps the connection point clean, and helps maintain a low grounding resistance (less than 4Ω). This prevents the overcurrent generated by lightning strikes due to poor contact at the connection point, which could lead to an increased grounding resistance and cause overvoltage at the connection point, resulting in the breakdown of some weak insulation links in the power line.

[0024] The cavity 31 has an air duct 32 near the terminal 4, and a fan 33 is provided in the air duct 32. The terminal 4 includes a sliding part 41 and a wiring part 42. The outer contour of the sliding part 41 is adapted to the cavity 31, and the sliding part 41 has a groove 411 that is adapted to slide with the protrusion 311 of the cavity 31. The thickness of the wiring part 42 is less than that of the sliding part 41. During use, the fan 33 rotates and delivers air from outside the grounding device 3 to the cavity 31 through the air duct 32, which can discharge dust from the wiring part 42 from one end of the cavity 31. In this embodiment, the fan 33 is mounted on the housing of the grounding device 3, and a filter screen is provided on one side to prevent external dust from entering the cavity 31 and causing contamination of the wiring part 42 when air is drawn. A wiring bolt 43 is provided on one side of the wiring part 42. The wiring bolt 43 is threadedly connected to a wiring nut 44, and the end of the wire 2 is clamped between the wiring nut 44 and the wiring part 42. The wire 2 and the terminal 4 are securely connected by the terminal bolt 43 and the terminal nut 44. In this embodiment, the terminal 4 and the cavity 31 are connected by the protrusion 311 and the groove 411 to achieve circuit conduction between them.

[0025] The grounding device 3 has a mounting port 34 at its top that is connected to the cavity 31. A metal rod 35 is inserted into the mounting port 34. The metal rod 35 is made of a reactive metal and is electrically connected to the cavity 31. In this embodiment, the cavity 31 and the terminal 4 are made of iron or copper, while the metal rod 35 is made of zinc. Because zinc is more reactive than iron or copper, it will preferentially undergo an oxidation reaction, thereby protecting other metal components. For example, in this embodiment, the cathode metal (cavity 31 and terminal 4) is protected by a sacrificial anode (metal rod 35). This effectively prevents the increase in contact resistance between the cavity 31 and the terminal 4 due to the formation of an oxide layer caused by oxidation, which is crucial for maintaining a low grounding resistance.

[0026] The metal rod 35 is provided with a cover 36, the top of which has an arc-shaped profile that is higher in the middle and lower around the edges. In this embodiment, the cover 36 covers both the upper end and the sides of the metal rod 35, and the outer diameter of the upper part of the cover 36 is larger than the diameter of the installation opening 34. When it rains, rainwater slides off the surface of the cover 36, preventing rainwater from entering the installation opening 34. The cover 36 is provided with a lifting part 361, which facilitates the installation of the metal rod 35 by construction personnel. The tower body 1 is provided with a sleeve 13 on one side, and the wire 2 passes through the sleeve 13. In this embodiment, the sleeve 13 wraps the wire 2 inside, preventing it from being directly affected by external objects, wind, rain, dust, etc., while providing a certain degree of insulation, reducing the contact between the wire 2 and other metal parts, and reducing the risk of electrical failure.

[0027] The grounding device 3 has a through-hole at the bottom and is fixed to the tower base 14 of the tower body 1, ensuring a good connection between the grounding device 3 and the ground, thereby effectively conducting the induced current to the earth and improving the safety and reliability of the entire power transmission system. The grounding device 3 has a downward-sloping edge 37 on its side. The downward-sloping edge 37 facilitates drainage and prevents rainwater or other liquids from accumulating on the grounding device 3. Furthermore, the edge 37 is made of a flexible material, which reduces the risk of accidental collisions, thereby improving the safety of the grounding device 3. The housing, slide 45, knob 47, sleeve 13, and cover 36 of the grounding device 3 are all made of insulating materials (such as polyethylene, polyvinyl chloride, etc.), and their surfaces are coated with a corrosion-resistant insulating coating, such as a PTFE insulating coating.

[0028] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A power transmission steel pipe tower with a lightning protection device, comprising a tower body, characterized in that: The tower is equipped with a lightning rod at the top and a conductor on the outside of the tower. One end of the conductor is connected to the outer casing of the power transmission equipment, and the other end is connected to the ground through a grounding device. The grounding device has multiple conductive cavities that are connected to the ground. A terminal block is slidably installed in the cavity. One end of the terminal block is connected to the conductor, and the other end is hollow and connected to a slide block. A screw rod is threaded through and threaded to the slide block. A knob is installed at one end of the screw rod.

2. A power transmission steel pipe tower with a lightning protection device according to claim 1, characterized in that: The cavity has an air duct near the terminal block, and the air duct is equipped with a fan. The terminal block includes a sliding part and a wiring part. The outer contour of the sliding part is adapted to the cavity, and the sliding part is provided with a groove that is adapted to slide with the protrusion of the cavity. The thickness of the wiring part is less than that of the sliding part. A wiring bolt is provided on one side of the wiring part. The wiring bolt is threaded and adapted to the wiring nut. The end of the wire is clamped between the wiring nut and the wiring part.

3. A power transmission steel pipe tower with a lightning protection device according to claim 1, characterized in that: The grounding device has an installation port at the top that is in communication with the cavity, and a metal rod is inserted into the installation port. The metal rod is made of a reactive metal.

4. A power transmission steel pipe tower with a lightning protection device according to claim 3, characterized in that: The metal rod is provided with a cover, the top of which has an arc-shaped profile that is high in the middle and low around the edges, and the cover is provided with a lifting part.

5. A power transmission steel pipe tower with a lightning protection device according to claim 1, characterized in that: The tower body is equipped with a sleeve on one side, and the wires are run through the sleeve.

6. A power transmission steel pipe tower with a lightning protection device according to claim 1, characterized in that: The bottom of the grounding device is through and fixed to the tower base.

7. A power transmission steel pipe tower with a lightning protection device according to claim 1, characterized in that: The grounding device has a downwardly sloping edge on its side.

8. A power transmission steel pipe tower with a lightning protection device according to claim 1, characterized in that: The housing, slide, knob, sleeve, and cover of the grounding device are all made of insulating material.

Images