Pole tower with built-in grounding plate

Abstract

This invention relates to the field of power equipment technology and discloses a pole with a built-in grounding electrode plate. The pole includes a pole body with several internal guide ribs extending from the upper end to the lower end. The lower end of the pole body is buried underground, and at least a portion of the buried surface is covered with a grounding electrode plate. A grounding nut is pre-embedded at the upper end of the pole body. The grounding electrode plate and the grounding nut are welded to the internal guide ribs for electrical connection. This pole with a built-in grounding electrode plate directly integrates the grounding electrode onto the pole and connects the upper grounding nut to the lower grounding electrode plate via the internal guide ribs. This satisfies the requirement of diverting lightning current to the ground to protect power distribution lines. Furthermore, the covered grounding electrode plate has a large contact area, low lightning impulse resistance, and a long service life, matching the lifespan of the pole body. This eliminates the need for periodic inspection and replacement, significantly reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a pole tower with a built-in grounding electrode plate. Background Technology

[0002] Lightning strikes are among the most serious natural disasters. They have numerous and severe impacts on power distribution lines. When lightning strikes, powerful lightning bolts can cause overvoltages in the lines, leading to short circuits and tripping of protection circuit breakers. Outdoor equipment in substations struck by lightning can malfunction or even catch fire. Lightning surges generated after a lightning strike can travel along transmission and distribution lines into substations, posing a significant threat to substation equipment and potentially causing widespread power outages, severely impacting social production and residents' lives. Internal substation distribution lines can develop lightning voltage after a lightning strike, potentially causing transformer high-voltage lines to experience inter-turn insulation breakdown. Therefore, the impact of lightning strikes on power distribution lines is enormous and cannot be ignored, necessitating effective lightning protection measures to ensure the safe, reliable, and stable operation of the power system.

[0003] Pole towers are commonly used supports in overhead power distribution lines, but they can also be used as lightning conductors. Therefore, pole towers can be connected to grounding electrodes to conduct lightning current into the ground, thereby reducing lightning voltage. Existing grounding electrodes are generally 1.5m long, 45mm*45mm hot-dip galvanized angle steel driven into the ground.

[0004] However, the existing structure of the external grounding electrode on the tower has the following problems:

[0005] 1) The underground grounding electrode is easily corroded, and its condition generally needs to be checked every five years, which is difficult and costly to maintain;

[0006] 2) The grounding resistance is relatively high, and multiple grounding electrodes may be necessary;

[0007] 3) The lifespan of the tower and the lifespan of the grounding electrode are not the same. If either fails prematurely, it will affect the conductivity. Summary of the Invention

[0008] Based on the above problems, the purpose of this invention is to provide a pole with a built-in grounding plate.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A pole with a built-in grounding electrode plate includes a pole body with a plurality of internal drainage ribs extending from the upper end to the lower end. The lower end of the pole body is buried underground, and at least a portion of the buried surface of the pole body is covered with a grounding electrode plate. A grounding nut is pre-embedded at the upper end of the pole body. The grounding electrode plate and the grounding nut are welded to the internal drainage ribs for electrical connection.

[0011] As an alternative, the grounding electrode is made of stainless steel, and the grounding electrode is welded to the drain rib using stainless steel welding rods.

[0012] As an alternative, the grounding nut is a stainless steel tube with a through bolt for fixing and connecting the crossarm. One end of the grounding nut is welded to the inner rib of the drain using a stainless steel welding rod, and the other end of the grounding nut is flush with or protrudes from the surface of the pole.

[0013] As an alternative, the pole body is a cement pole made of reinforced concrete, and the drainage reinforcement is a longitudinal steel bar pre-embedded in the cement pole, with multiple drainage reinforcement bars distributed in a ring around the axis of the pole body.

[0014] As an alternative, a reinforcing steel bar is sandwiched between part of the drainage inner rib and the grounding electrode plate, and the reinforcing steel bar is welded to the drainage inner rib and the grounding electrode plate respectively.

[0015] As an alternative, the grounding electrode is installed near the lower end of the pole, and the height of the grounding electrode is 1 / 3 of the depth to which the pole is buried in the ground.

[0016] As an alternative, the grounding nuts are distributed in three layers on the pole: upper, middle and lower. The distance between the upper grounding nut and the upper end of the pole is 10cm, the distance between the middle grounding nut and the upper grounding nut is 50cm to 100cm, and the distance between the lower grounding nut and the middle grounding nut is 50cm to 100cm.

[0017] As an optional solution, four grounding nuts are provided in each layer, and the four grounding nuts are evenly distributed around the circumference.

[0018] The beneficial effects of this invention are:

[0019] This pole with its own grounding plate integrates the grounding electrode directly onto the pole. The grounding nut at the top is connected to the grounding electrode at the bottom through the internal ribs inside the pole. This meets the requirement of conducting lightning current to the ground to protect the power distribution lines. Furthermore, the enclosed grounding electrode has a large contact area, low lightning impulse resistance, and a long service life, which can be equal to the life of the pole itself. This eliminates the need for regular inspection and replacement, greatly reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of a tower with a built-in grounding electrode provided in an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Cross-sectional view at point AA.

[0022] In the attached image:

[0023] 1. Pole body; 2. Drainage inner reinforcement; 3. Grounding electrode plate; 4. Grounding nut; 5. Reinforcing steel bar. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0028] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0029] Please see Figure 1 and Figure 2As shown, this embodiment provides a pole with a built-in grounding electrode plate, including a pole body 1. The pole body 1 is provided with a plurality of internal drainage ribs 2 extending from the upper end to the lower end. The lower end of the pole body 1 is buried in the ground, and at least a portion of the buried surface of the pole body 1 is covered with a grounding electrode plate 3. A grounding nut 4 is pre-embedded at the upper end of the pole body 1. The grounding electrode plate 3 and the grounding nut 4 are respectively welded to the internal drainage ribs 2 for conduction.

[0030] In at least one embodiment, the grounding electrode 3 is a stainless steel plate, and the grounding electrode 3 is welded to the draining inner rib 2 by stainless steel welding rods. Alternatively, the grounding electrode 3 may also be made of other corrosion-resistant conductive materials.

[0031] In at least one embodiment, the grounding nut 4 is a stainless steel tube, and a through bolt for fixing and connecting the crossarm is inserted in the grounding nut 4. One end of the grounding nut 4 is welded to the inner rib 2 of the drainage through a stainless steel welding rod, and the other end of the grounding nut 4 is flush with or protrudes from the surface of the rod body 1.

[0032] In at least one embodiment, the pole 1 is a cement pole made of reinforced concrete, and the drainage reinforcement 2 is a longitudinal steel bar pre-embedded in the cement pole, with multiple drainage reinforcement 2 distributed in a ring around the axis of the pole 1. It should be noted that the drainage reinforcement 2 utilizes the original structural reinforcing steel bars in the cement pole without adding any additional structure.

[0033] In the manufacturing process of this cement pole, a steel cage is first built by longitudinal steel bars and stirrups; then, a grounding nut 4 is inserted at the required position at the top of the steel cage, and a grounding electrode plate 3 is wrapped around the bottom of the steel cage. The grounding nut 4 and the grounding electrode plate 3 are welded to the steel cage respectively; finally, a template is built outside the steel cage, concrete is poured in, and it is solidified by centrifugation.

[0034] In some embodiments, a reinforcing steel bar 5 is sandwiched between a portion of the inner drainage rib 2 and the grounding electrode plate 3, and the reinforcing steel bar 5 is welded to both the inner drainage rib 2 and the grounding electrode plate 3, such as... Figure 2 As shown, the reinforcing steel bars 5 are arranged close to the outer surface of the longitudinal steel bars, thereby ensuring both the reliable conductivity of the grounding plate 3 and the structural stability.

[0035] In some embodiments, the grounding plate 3 is disposed near the lower end of the rod 1, and the height of the grounding plate 3 is 1 / 3 of the depth to which the rod 1 is buried in the ground, but is not limited thereto.

[0036] Specifically, the dimensions of the grounding electrode plate 3 are designed according to the following requirements: the area of ​​the stainless steel grounding electrode plate 3 is such that the grounding resistance is no more than 4 ohms in ordinary soil with medium acidity and alkalinity, and the thickness is such that it has a service life of 40 years under a corrosion rate of 0.05mm / a, matching the service life of the cement pole.

[0037] In some embodiments, the grounding nuts 4 are distributed in three layers on the pole 1, with the upper layer grounding nuts 4 10cm away from the upper end of the pole 1, the middle layer grounding nuts 4 50cm to 100cm away from the upper layer grounding nuts 4, and the lower layer grounding nuts 4 50cm to 100cm away from the middle layer grounding nuts 4, thus meeting the arrangement requirements of the crossarm supporting the overhead power distribution line.

[0038] Furthermore, each layer has four grounding nuts 4, which are evenly distributed around the circumference, allowing for staggered arrangement between the upper and lower crossarms.

[0039] In summary, this tower with its own grounding plate has the following advantages:

[0040] 1) The grounding plate 3 and the pole 1 are integrated into one piece, which makes the construction more convenient and meets the high conductivity requirements at the same time;

[0041] 2) The stainless steel grounding plate 3 has a long service life, which can be the same as the pole body 1. It does not need to be inspected every five years, which greatly reduces the difficulty and cost of maintenance.

[0042] 3) The grounding electrode plate 3 with the enclosed form has a low grounding resistance, which can meet the requirement that the resistance is not greater than 4 ohms, and there is no need to set up an additional grounding electrode;

[0043] 4) The lightning current on the upper distribution line can be conducted to the ground through the inner rib 2 inside the pole 1. The inner rib 2 plays both a mechanical stress-bearing role and an electrical conduction role.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pole with a built-in grounding plate, comprising a pole body (1), characterized in that, The rod (1) is provided with a plurality of drainage inner ribs (2) extending from the upper end to the lower end. The lower end of the rod (1) is buried underground, and at least part of the buried surface of the rod (1) is covered with a grounding electrode plate (3). A grounding nut (4) is pre-embedded at the upper end of the rod (1). The grounding electrode plate (3) and the grounding nut (4) are respectively welded to the drainage inner ribs (2) for conduction.

2. The pole tower with its own grounding electrode plate according to claim 1, characterized in that, The grounding electrode plate (3) is a stainless steel plate, and the grounding electrode plate (3) and the drain inner rib (2) are welded together by stainless steel welding rods.

3. The pole with its own grounding electrode plate according to claim 1, characterized in that, The grounding nut (4) is a stainless steel tube. A through bolt for fixing and connecting the crossarm is inserted in the grounding nut (4). One end of the grounding nut (4) is welded to the inner rib (2) of the drainage through a stainless steel welding rod. The other end of the grounding nut (4) is flush with or protrudes from the surface of the rod body (1).

4. The pole tower with its own grounding electrode plate according to claim 1, characterized in that, The pole (1) is a cement pole made of reinforced concrete, and the drainage inner reinforcement (2) is a longitudinal steel bar pre-embedded in the cement pole. Multiple drainage inner reinforcements (2) are distributed in a ring around the axis of the pole (1).

5. The pole tower with its own grounding electrode plate according to claim 4, characterized in that, A reinforcing steel bar (5) is sandwiched between the inner rib (2) and the grounding electrode plate (3), and the reinforcing steel bar (5) is welded to the inner rib (2) and the grounding electrode plate (3) respectively.

6. The pole with its own grounding electrode plate according to claim 1, characterized in that, The grounding electrode plate (3) is located near the lower end of the rod (1), and the height of the grounding electrode plate (3) is 1 / 3 of the depth to which the rod (1) is buried underground.

7. The pole with its own grounding electrode plate according to claim 1, characterized in that, The grounding nuts (4) are distributed in three layers on the rod (1), with the upper layer grounding nuts (4) 10cm away from the upper end of the rod (1), the middle layer grounding nuts (4) 50cm to 100cm away from the upper layer grounding nuts (4), and the lower layer grounding nuts (4) 50cm to 100cm away from the middle layer grounding nuts (4).

8. The pole with its own grounding electrode plate according to claim 7, characterized in that, Four grounding nuts (4) are provided in each layer, and the four grounding nuts (4) are evenly distributed around the circumference.

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