CN108933341B - A tower grounding device - Google Patents

Abstract

The invention provides a grounding device for a tower, comprising a first connecting beam, a second connecting beam, a grounding plate and a grounding diverging ball, wherein a plurality of the first connecting beams are provided, and the first connecting beams are connected end-to-end to form a closed enclosure ring, the first connecting beam is connected with a second connecting beam, one end of the second connecting beam is located in the closed ring, the other end is located outside the closed ring, and one end of the second connecting beam is located in the closed ring A grounding plate is provided, an end of the second connecting beam located outside the closed ring is provided with a grounded diverging ball, and the second connecting beam is arranged at a certain angle with the plane where the closed ring is located. The plane of the closed ring formed by the second connecting beam and the first connecting beam is arranged at a certain angle, so that the second connecting beam is inclined downward, which can improve the lightning guiding performance of the grounding device. The second connecting beam is inclined from the inner side of the closed ring. It extends downward to the outside of the closed ring and is radially arranged, which increases the effective cross-sectional area of the grounding device and improves the lightning protection efficiency of the grounding device.

Description

A tower grounding device

technical field

The invention belongs to the technical field of transmission line construction, and in particular relates to a pole tower grounding device.

Background technique

With the continuous increase of the power transmission capacity of the power grid, when the transmission line fails, the magnitude of the short-circuit current also increases. Insulator short to ground fault.

At present, the grounding device of a transmission line tower includes a grounding body and a grounding downconductor. The grounding body, also known as the grounding electrode, refers to a metal conductor buried in the ground and in direct contact with the soil to discharge current to the ground. The grounding downconductor is a wire used to connect the lightning protection wire and the grounding body. Its function is to conduct the lightning current on the lightning protection wire, and flow into the earth through the grounding body. It is an important part of the transmission line to avoid lightning strikes. Therefore, the grounding device must be Reliable and effective, in order to reduce the lightning trip rate of the transmission line.

The existing grounding equipment mainly has the following problems:

1. The grounding equipment is simple in structure, solidified in form, and has poor lightning protection effect;

2. The contact area between the grounding electrode of the grounding equipment and the soil is small, which cannot meet the requirements of discharging large currents to the ground;

3. The grounding device cannot collect the leakage generated by the lightning strike, and the lightning protection leakage efficiency is low, and there are certain safety hazards.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned problems in the prior art, and to provide a tower grounding device. The second connecting beam is arranged at a certain angle with the plane where the closed ring is located, which can improve the lightning guiding performance of the grounding device. The beams extend obliquely downward from the inner side of the closed ring to the outer side of the closed ring, and are arranged radially, which increases the effective cross-sectional area of the grounding device and improves the lightning protection efficiency of the grounding device.

The present invention is achieved through the following technical solutions:

A tower grounding device includes a first connecting beam, a second connecting beam, a grounding plate and a grounding diverging ball, the first connecting beam is provided with a plurality of, and the first connecting beams are connected end to end to form a closed loop, the The first connecting beam is connected with a second connecting beam, one end of the second connecting beam is located in the closed ring, the other end is located outside the closed ring, and one end of the second connecting beam located in the closed ring is provided with a grounding plate , the end of the second connecting beam located outside the closed ring is provided with a grounded diverging ball, and the second connecting beam and the plane where the closed ring is located are arranged at a certain angle. The plane of the closed ring formed by the second connecting beam and the first connecting beam is arranged at a certain angle, so that the second connecting beam is inclined downward, which can improve the lightning guiding performance of the grounding device. The second connecting beam is inclined from the inner side of the closed ring. It extends downward to the outside of the closed ring and is radially arranged, which increases the effective cross-sectional area of the grounding device and improves the lightning protection efficiency of the grounding device.

The first connecting beam and the second connecting beam are welded or integrally formed. Welding the first connecting beam and the second connecting beam together to form a whole, or directly integrally forming the first connecting beam and the second connecting beam, can increase the integrity between adjacent parts and improve the lightning guiding performance.

The second connecting beam includes a horizontal section and an inclined section, one end of the horizontal section is connected to the ground plate, the other end is connected to the inclined section, one end of the inclined section is connected to the horizontal section, and the other end is connected to the ground diverging ball. The second connecting beam is set into two parts, one part is a horizontal section, the other part is an inclined section, the horizontal section can increase the collection effect of lightning strikes near the ground, and the inclined section can enhance the lightning guide flow field of the second connecting beam type, and collectively transport the collected lightning strikes to the bottom of the grounding device.

The included angle between the second connecting beam and the plane where the closed ring is located is 30°≤α≤60°. Setting the inclination angle of the second connecting beam between 30° and 60° can not only ensure the smoothness of lightning guidance, but also ensure the effective cross-sectional area of the grounding device.

The included angle between the second connecting beam and the plane where the closed ring is located is 45°. The angle between the second connecting beam and the plane where the closed ring is located is set to 45°, which can achieve the maximum lightning guide performance and sufficient effective cross-sectional area.

The grounding plate is vertically arranged with the second connecting beam. The grounding plate is vertically arranged with the second connecting beam, and can play a certain role in fixing the second connecting beam after the burial is completed, so as to avoid the sliding phenomenon of the second connecting beam, affecting the connection stability with the tower and reducing the lightning protection effect.

The grounded diverging sphere includes a sphere and a diverging rod, the sphere is fixed at the end of the second connecting beam, a plurality of diverging rods are arranged on the sphere, the diverging rods are radially arranged on the sphere, and the diverging rods face toward the sphere. Tilt down setting. Dispersing balls are arranged at the bottom of the grounding device, which can increase the contact area with the ground, and can effectively evacuate lightning strikes in a timely manner to ensure safe use.

The end of the diverging rod is provided with a rod tip. The end of the diverging rod is provided with a rod tip, which can improve the discharge performance of the diverging rod and ensure the safety of use.

The closed ring is a polygon. The first connecting beam is enclosed into a polygon, and the tower is enclosed to avoid leakage due to lightning strikes and improve the safety of use.

The surfaces of the first connecting beam, the second connecting beam, the grounding plate and the grounding diverging ball are provided with conductive paste coating. Setting the conductive paste coating can effectively increase the conductive effect of the grounding device, reduce the contact resistance, and improve the lightning protection effect.

Compared with the prior art, the beneficial effects of the present invention are:

1. In a tower grounding device of the present invention, the plane of the closed ring formed by the second connecting beam and the first connecting beam is arranged at a certain angle, so that the second connecting beam is inclined downward, which can improve the lightning guiding performance of the grounding device. , the second connecting beam extends obliquely downward from the inner side of the closed ring to the outer side of the closed ring, and is arranged radially, which increases the effective cross-sectional area of the grounding device and improves the lightning protection efficiency of the grounding device;

2. In a tower grounding device of the present invention, the first connecting beam and the second connecting beam are welded together to form a whole, or the first connecting beam and the second connecting beam are directly integrally formed, which can increase the adjacent parts. The integration between them can improve the performance of mine guidance;

3. In a tower grounding device of the present invention, the second connecting beam is set into two parts, one part is a horizontal section, the other part is an inclined section, and the horizontal section can be set to increase the collection effect of lightning strikes near the ground. It can enhance the lightning-guiding flow field pattern of the second connecting beam, and jointly transport the collected lightning strikes to the bottom of the grounding device;

4. In a tower grounding device of the present invention, the inclination angle of the second connecting beam is set between 30° and 60°, which can not only ensure the smoothness of lightning guidance, but also ensure the effective cross-sectional area of the grounding device;

5. In a tower grounding device of the present invention, the grounding plate is vertically arranged with the second connecting beam, and can play a certain role in fixing the second connecting beam after the burying is completed, so as to avoid the sliding phenomenon of the second connecting beam, which affects the connection with the tower. improve the connection stability and reduce the lightning protection effect;

6. In a tower grounding device of the present invention, a diverging ball is set at the bottom of the grounding device, which can increase the contact area with the ground, can evacuate lightning strikes in a timely and effective manner, and ensure safe use. The end of the diverging rod is set with a pole tip , which can improve the discharge performance of the diverging rod and ensure the safety of use.

Description of drawings

Fig. 1 is the top view structure schematic diagram of the present invention;

Fig. 2 is the side view structure schematic diagram of the present invention;

Fig. 3 is the second connecting beam structure schematic diagram of the present invention;

4 is a schematic diagram of acupuncture position structure of the present invention;

5 is a schematic side view of the grounded diverging sphere of the present invention;

FIG. 6 is a schematic top view of the grounded diverging sphere of the present invention;

Fig. 7 is C-C cross-sectional structure schematic diagram in Fig. 4;

Among them, 1, the first connecting beam, 2, the ground plate, 3, the second connecting beam, 4, the ground diverging ball, 5, the horizontal section, 6, the inclined section, 7, the sphere, 8, the diverging rod, 9, the acupuncture .

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in further detail:

As shown in Figures 1-2, a tower grounding device includes a first connecting beam 1, a second connecting beam 3, a grounding plate 2 and a grounding diverging ball 4, the first connecting beam 1 is provided with a plurality of The first connecting beam 1 is connected end to end to form a closed ring, and the closed ring is a polygon. The first connecting beam 1 is enclosed into a polygon, and the tower is enclosed to avoid leakage due to lightning strikes, thereby improving the safety of use. In this application, the closed ring is a quadrilateral. The connection of the first connection beam 1 is provided with a second connection beam 3, that is, the connection of two adjacent first connection beams 1 is provided with a second connection beam 3, and one end of the second connection beam 3 is located at the closed end. In the ring, the other end is located outside the closed ring, one end of the second connecting beam 3 located in the closed ring is provided with a grounding plate 2, and one end of the second connecting beam 3 located outside the closed ring is provided with a grounding diverging ball 4, so The second connecting beam 3 is arranged at a certain angle α with the plane where the closed ring is located. The plane of the closed ring formed by the second connecting beam 3 and the first connecting beam 1 is arranged at a certain angle, so that the second connecting beam 3 is inclined downward, which can improve the lightning guiding performance of the grounding device. The inner side of the ring extends obliquely downward to the outer side of the closed ring, and the radial arrangement increases the effective cross-sectional area of the grounding device and improves the lightning protection efficiency of the grounding device.

The first connecting beam 1 and the second connecting beam 3 are welded or integrally formed. Welding the first connecting beam 1 and the second connecting beam 3 together to make them a whole, or the first connecting beam 1 and the second connecting beam 3 are directly integrally formed, which can increase the integrity between adjacent components and improve the Lightning performance. In this application, the first connecting beam 1 and the second connecting beam 3 are connected by welding.

As shown in FIG. 3 , the second connecting beam 3 includes a horizontal section 5 and an inclined section 6. One end of the horizontal section 5 is connected to the ground plate 2, and the other end is connected to the inclined section 6. One end of the inclined section 6 is connected It is connected to the horizontal section 5, and the other end is connected to the grounded diverging ball 4. The second connecting beam 3 is set into two parts, one part is the horizontal section 5, the other part is the inclined section 6, the horizontal section 5 can be set to increase the collection effect of lightning strikes near the ground, and the inclined section 6 can be set to strengthen the second connecting beam. 3's lightning-guiding flow field type, which collectively transports the collected lightning strikes to the bottom of the grounding device.

As shown in FIG. 2 , the included angle α between the second connecting beam 3 and the plane where the closed ring is located is 30°≤α≤60°. Setting the inclination angle of the second connecting beam 3 between 30° and 60°, that is, 30°≤α≤60°, can not only ensure the smoothness of lightning guidance, but also ensure the effective cross-sectional area of the grounding device. The included angle α between the second connecting beam 3 and the plane where the closed ring is located is 45°. The angle between the second connecting beam 3 and the plane where the closed ring is located is set to 45°, which can achieve the maximum lightning guide performance and sufficient effective cross-sectional area.

The grounding plate 2 is perpendicular to the second connecting beam 3 . The grounding plate 2 is arranged vertically with the second connecting beam 3, and can play a certain role in fixing the second connecting beam 3 after the burying is completed, so as to avoid the sliding phenomenon of the second connecting beam 3, affecting the connection stability with the tower and reducing the anti-corrosion effect. Thunder effect.

As shown in FIGS. 5-6 , the grounded diverging ball 4 includes a ball body 7 and a diverging rod 8 , the ball body 7 is fixed at the end of the second connecting beam 3 , and a plurality of diverging rods 8 are arranged on the ball body 7 , so The diverging rods 8 are radially arranged on the sphere 7 , and the diverging rods 8 are inclined downward. Dispersing balls are arranged at the bottom of the grounding device, which can increase the contact area with the ground, and can effectively evacuate lightning strikes in a timely manner to ensure safe use. The end of the diverging rod 8 is provided with a rod tip. The end of the diverging rod 8 is provided with a rod tip, which can improve the discharge performance of the diverging rod 8 and ensure the safety of use.

The surfaces of the first connecting beam 1 , the second connecting beam 3 , the ground plate 2 and the ground diverging ball 4 are provided with conductive paste coating. Setting the conductive paste coating can effectively increase the conductive effect of the grounding device, reduce the contact resistance, and improve the lightning protection effect.

As shown in FIG. 4 and FIG. 7 , the second connecting beam 3 is provided with a needle punch 9 , and the needle punch 9 is arranged at one end of the second connecting beam 3 located outside the closed ring, and is provided on the second connecting beam 3 The needling 9 can increase the shunt acupuncture 9, which is conducive to the rapid introduction of current into the soil, and at the same time, the current dissipation capability of the grounding device can be improved. The needle punches 9 are evenly distributed on the second connecting rod, and the needle punches 9 are arranged divergently outward on the outer surface of the second connecting beam 3 . It is more uniform, reduces the grounding resistance of the grounding device, and improves the grounding effect.

The above technical solution is only an embodiment of the present invention. For those skilled in the art, on the basis of the application methods and principles disclosed in the present invention, it is easy to make various types of improvements or deformations, not limited to The methods described in the above-mentioned specific embodiments of the present invention, therefore, the methods described above are only preferred, and have no restrictive meaning.

Claims (10)

1. A pole tower grounding device is characterized in that, comprising a first connecting beam, a second connecting beam, a ground plate and a ground diverging ball, the first connecting beam is provided with a plurality of, and the first connecting beam is connected end to end to enclose A closed ring is formed, a second connecting beam is arranged at the connection of the first connecting beam, one end of the second connecting beam is located in the closed ring, the other end is located outside the closed ring, and the second connecting beam is located in the closed ring One end of the second connecting beam is provided with a grounding plate, one end of the second connecting beam located outside the closed ring is provided with a grounding diverging ball, and the second connecting beam and the plane where the closed ring is located are arranged at a certain angle; The second connecting beam is provided with acupuncture, the acupuncture is arranged at one end of the second connecting beam located outside the closed ring, the acupuncture is evenly distributed on the second connecting beam, and the acupuncture is located on the second connecting beam The outer surface is set divergently towards the outside. 2 . The tower grounding device according to claim 1 , wherein the first connecting beam and the second connecting beam are welded or integrally formed. 3 . 3. A tower grounding device according to claim 1, wherein the second connecting beam comprises a horizontal section and an inclined section, one end of the horizontal section is connected with the grounding plate, and the other end is connected with the inclined section, One end of the inclined section is connected with the horizontal section, and the other end is connected with the grounded diverging ball. 4 . The tower grounding device according to claim 1 , wherein the angle between the second connecting beam and the plane where the closed ring is located is 30°≤α≤60°. 5 . 5 . The tower grounding device according to claim 4 , wherein the included angle between the second connecting beam and the plane where the closed ring is located is 45°. 6 . 6 . The tower grounding device according to claim 1 , wherein the grounding plate is vertically arranged with the second connecting beam. 7 . 7 . The tower grounding device according to claim 1 , wherein the grounding diverging sphere comprises a sphere and a diverging rod, the sphere is fixed at the end of the second connecting beam, and the sphere is provided with a plurality of The diverging rod is radially arranged on the sphere, and the diverging rod is inclined downward. 8 . The tower grounding device according to claim 7 , wherein the end of the diverging rod is provided with a rod tip. 9 . 9 . The tower grounding device according to claim 1 , wherein the closed ring is a polygon. 10 . 10 . The tower grounding device according to claim 1 , wherein a conductive paste coating is provided on the surfaces of the first connecting beam, the second connecting beam, the grounding plate and the grounding diverging ball. 11 .

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