CN219203518U

CN219203518U - Lightning-protection grounding device for distribution line

Info

Publication number: CN219203518U
Application number: CN202320085372.3U
Authority: CN
Inventors: 陈学台
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-06-16
Anticipated expiration: 2033-01-30

Abstract

The utility model relates to the technical field of distribution line protection devices, in particular to a distribution line lightning-protection grounding device, which comprises a grounding electrode, a fixing sleeve, a connecting conductor and a grounding conductor: the grounding electrode comprises a rod body part and a rod head part which are connected, and the diameter of the rod head part is larger than that of the rod body part; the fixing sleeve is sleeved on the rod body part and is detachably connected with the rod head part; the connecting conductor is fixedly connected with the fixing sleeve; the end face of the fixing sleeve facing the head of the rod is provided with a convex part, and the end face of the head of the rod facing the fixing sleeve is provided with an inner concave part matched with the convex part. The fixing sleeve and the rod head can be conveniently detached, so that the grounding electrode can be conveniently pulled out for replacement or repair, the operation is simple, and the maintenance cost is low; the contact area of the head of the rod and the fixed sleeve piece is large, so that a better grounding effect is obtained, and the lightning protection effect is prevented from being influenced due to poor contact between the head of the rod and the fixed sleeve piece.

Description

Lightning-protection grounding device for distribution line

Technical Field

The utility model relates to the technical field of distribution line protection devices, in particular to a lightning-protection grounding device for a distribution line.

Background

The insulation of the 10kV line is a development trend of the current distribution line, and in order to prevent the insulated wires from being broken due to the fact that a large amount of lightning current cannot be released due to lightning strike, and the occurrence of the event of line outage is caused, a lightning arrester is generally installed on the distribution line and is grounded through a grounding device. Grounding device refers to the generic term of a grounding electrode buried under the ground and a connecting wire from the grounding electrode to equipment.

The patent with publication number CN103457044B discloses a grounding device of a 10kV power distribution network overhead line pole tower, which comprises a grounding down-lead of electrical equipment and a metal grounding body group buried in the ground, wherein the metal grounding body group buried in the ground consists of a surrounding pole tower, an iron annular grounding body buried in the ground horizontally and at least 3 rod-shaped grounding poles buried in the ground vertically, and the grounding device can effectively reduce the grounding resistance of the pole tower.

For areas with severe underground soil environments, the surface of the grounding electrode is easy to oxidize, so that the resistance of the grounding electrode is increased, and when lightning stroke occurs, the lightning protection effect is poor and a good protection effect cannot be achieved. The grounding electrode of the device is welded and fixed on the annular grounding body, after the surface of the grounding electrode is oxidized, the grounding electrode is inconvenient to pull out for repair treatment, and if the novel grounding electrode is directly replaced, the annular grounding body is also required to be replaced together, so that the maintenance cost is high.

Disclosure of Invention

The utility model provides a lightning-protection grounding device for a distribution line, which aims to solve the problems in the prior art.

The technical problems solved by the utility model are realized by adopting the following technical scheme:

a distribution line lightning-grounding device, comprising:

the grounding electrode comprises a rod body part and a rod head part which are connected, and the diameter of the rod head part is larger than that of the rod body part;

the fixing sleeve is sleeved on the rod body part and is detachably connected with the rod head part through a screw;

the connecting conductor is fixedly connected with the fixing sleeve;

and one end of the grounding conductor is connected with the connecting conductor, and the other end of the grounding conductor is used for being connected with the lightning arrester. The grounding conductor adopts flat iron.

Preferably, the head of the rod is provided with a mounting hole, the fixing sleeve is provided with through hole threads corresponding to the mounting hole, and the fixing sleeve and the head of the rod are detachably connected through screws which are arranged in the mounting hole and are in threaded connection with the through hole threads.

Preferably, the end face of the fixing sleeve facing the head part of the rod is provided with a convex part, the end face of the head part facing the fixing sleeve is provided with an inner concave part matched with the convex part, and the convex part is in plug-in fit with the inner concave part.

Preferably, the end face of the fixing sleeve facing the head part of the rod is provided with an inner concave part, the end face of the head part facing the fixing sleeve is provided with a convex part matched with the inner concave part, and the convex part is in plug-in fit with the inner concave part.

Preferably, the cross section of the protruding part is semicircular, trapezoidal or triangular.

Preferably, the end face of the club head part far away from the club body part is provided with a rotation adjusting groove. The rotation adjusting groove can be a straight groove, a cross groove, a plum blossom groove, an inner hexagonal groove, a triangular groove or an outer hexagonal groove and the like, and can conveniently drive the grounding electrode to rotate through an external tool.

Preferably, the end of the shaft portion remote from the head portion forms a pointed structure.

Preferably, the connecting conductor is in an annular structure, and is formed by splicing at least two arc plates.

Preferably, 2, 3, 4 or 5 fixing kits which are uniformly distributed are arranged on the connecting conductor.

Preferably, the connecting conductor is in a major arc structure, and 2 or 3 fixing sleeve members which are uniformly distributed are arranged on the connecting conductor.

The utility model has the beneficial effects that:

1. the fixing sleeve and the club head are detachably connected through the screw, and after the screw is screwed, the fixing sleeve and the club head are in direct contact, so that conductivity is facilitated; when the oxidized grounding electrode needs to be replaced or repaired, the fixing sleeve piece can be separated from the head of the rod by disassembling the screw, so that the grounding electrode can be conveniently pulled out for replacement and repair; then the replaced grounding electrode is inserted into the fixing sleeve piece and the original soil jack again, and the screw is installed, so that the operation is simple, and the maintenance cost is low;

2. through addding bellying and indent, can increase the area of contact of pole head and fixed external member to obtain better earthing effect, avoid leading to lightning-arrest effect to receive the influence because of pole head and fixed external member contact failure.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive faculty for a person skilled in the art.

Fig. 1 is a usage state diagram of embodiment 1 of the present utility model:

fig. 2 is a partial schematic view of a connection between a grounding electrode and a fixing sleeve:

fig. 3 is a top view of embodiment 1 of the present utility model (the ground electrode is not shown):

fig. 4 is a schematic structural diagram of embodiment 1 of the present utility model:

fig. 5 is a top view (ground electrode not shown) of embodiment 2 of the present utility model:

in the figure, 1, a grounding electrode; 11. a shaft portion; 12. a stem head; 121. a mounting hole; 122. an inner concave portion; 123. rotating the adjusting groove; 2. a fixing sleeve; 21. a through hole thread; 22. a boss; 3. a connection conductor; 31. an arc-shaped plate; 4. a ground conductor; 5. a lightning arrester; 6. a screw; 7. and (5) a pole tower.

Detailed Description

The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a distribution line lightning-protection grounding device including: a grounding electrode 1, a fixing sleeve 2, a connecting conductor 3 and a grounding conductor 4.

The grounding electrode 1 comprises a rod body 11 and a rod head 12 which are connected, wherein the diameter of the rod head 12 is larger than that of the rod body 11; one end of the shaft part 11 far away from the head part 12 forms a pointed structure; the club head 12 is disc-shaped, the club head 12 and the club body 11 are coaxially arranged, and the club body 11 can be conveniently embedded into the soil by knocking the club head 12; a galvanized layer can be arranged on the outer wall of the grounding electrode 1 for corrosion prevention;

the fixing sleeve 2 is sleeved on the rod body part 11 and is detachably connected with the rod head part 12 through the screw 6, and the grounding electrode 1 can be conveniently assembled and disassembled through the screw 6; after the screw 6 is detached, the grounding electrode 1 can be taken out, so that the replacement and repair of the grounding electrode 1 are realized; the fixed sleeve member 2 is in a ring disk shape or a cylindrical sleeve shape, and the fixed sleeve member 2 is in clearance fit with the rod body 11, so that the fixed sleeve member can be conveniently sleeved on the rod body 11, and meanwhile, the fixed sleeve member can guide the grounding electrode 1 when the grounding electrode 1 is embedded into soil, so that the grounding electrode 1 can be conveniently embedded into the soil in a vertical posture;

the connecting conductor 3 is fixedly connected with the fixing sleeve 2, specifically, the upper end surface of the connecting conductor 3 is welded with the bottom surface of the fixing sleeve 2; the connecting conductor 3 is of an annular structure as a whole, the connecting conductor 3 is formed by splicing two arc plates 31 which are of semicircular arc as a whole, and the arc plates 31 are disconnected or provided with holes at the connecting part of the fixing sleeve 2 so as to allow the club head 12 to pass through; after the two arc plates 31 clamp the tower, the two arc plates are welded together to form a state of surrounding the tower 7; the connecting conductors 3 may be distributed with 2, 3, 4 or 5 fixing members 2 distributed uniformly, in this embodiment, the connecting conductors 3 are disposed with 4 fixing members 2 distributed uniformly, i.e. two fixing members 2 are disposed on each arc plate 31.

One end of the grounding conductor 4 is connected with the connecting conductor 3, and the other end is used for being connected with the lightning arrester 5; the lightning arrester 5 is arranged on the pole tower 77 through a lightning arrester cross arm; the grounding conductor 4 adopts flat iron;

when the distribution line is struck by lightning, the lightning is discharged to the ground through the lightning arrester 5, the grounding conductor 4, the connecting conductor 3, the fixing sleeve piece 2 and the grounding electrode 1, so that a lightning protection effect is realized.

In this embodiment, in order to facilitate the connection between the fixing sleeve 2 and the head 12 by the screw 6, referring to fig. 3 and 4, a mounting hole 121 is formed in the head 12, a through hole thread 21 corresponding to the mounting hole 121 is formed in the fixing sleeve 2, the screw 6 passes through the mounting hole 121 and then is in threaded connection with the through hole thread 21, so as to realize the detachable connection between the fixing sleeve 2 and the head 12, and the through hole thread 21 in the fixing sleeve 2 and the mounting hole 121 in the head 12 are four. Thus, after the screw 6 is tightened, the fixing sleeve 2 and the club head 12 are in direct contact, so that electric conduction is facilitated. When the oxidized grounding electrode 1 needs to be replaced and repaired, the fixing sleeve member 2 and the rod head 12 can be separated by detaching the screw 6, so that the grounding electrode 1 can be conveniently pulled out for replacement and repair; then, the replaced grounding electrode 1 is inserted into the fixing sleeve member 2 and the original soil jack again, and the screw 6 is installed.

In this embodiment, in order to increase the contact area between the club head 12 and the fixing sleeve 2 and obtain a good grounding effect, as shown in fig. 2, the fixing sleeve 2 is provided with a plurality of protrusions 22 on the end face facing the club head 12, the protrusion 22 is provided with a plurality of concave portions 122 matching with the protrusions 22 on the end face facing the fixing sleeve 2, and the protrusions 22 are in plug-fit with the concave portions 122. The surface area of the fixing sleeve 2 can be increased by the arrangement of the protruding part 22, the surface area of the head 12 of the rod can be increased by the arrangement of the inner concave part 122, and the contact area between the head 12 of the rod and the fixing sleeve 2 can be increased after the protruding part 22 is in plug-in fit with the inner concave part 122, so that a better grounding effect is obtained, and the lightning protection effect is prevented from being influenced due to poor contact between the head 12 of the rod and the fixing sleeve 2. In other embodiments, the protruding portion 22 and the concave portion 122 may be disposed in opposite directions, that is, the end face of the fixing sleeve 2 facing the head 12 is provided with the concave portion 122, the end face of the head 12 facing the fixing sleeve 2 is provided with the protruding portion 22 matching with the protruding portion 22, and the protruding portion 22 is in plug-in fit with the concave portion 122, which also may increase the contact area between the head 12 and the fixing sleeve 2, but in this way, since the concave portion 122 is opened upwards, soil may enter the concave portion 122, which affects the protruding portion 22 to enter the concave portion 122, and the protruding portion 22 may be fully contacted with the concave portion 122 only by sufficiently cleaning the soil of the concave portion 122.

In the present embodiment, the protruding portion 22 is provided in a semicircular shape in cross section. In other embodiments, the boss 22 may be configured as a trapezoid or triangle, with the recess 122 conforming to the cross-section of the boss 22.

In this embodiment, referring to fig. 2 and 4, in order to facilitate the adjustment of the angle of the grounding electrode 1 after the grounding electrode 1 is inserted into the soil, the protruding portion 22 and the concave portion 122 are correspondingly angled, and are smoothly engaged and connected together, so that the screw 6 can be screwed down, and the end surface of the head portion 12 far from the shaft portion 11 is provided with a rotation adjustment groove 123. The rotation adjusting groove 123 may be a groove which can facilitate the rotation of the grounding electrode 1 driven by an external tool, such as a straight groove, a cross groove, a quincuncial groove, an inner hexagonal groove, a triangular groove, or an outer hexagonal groove.

During installation, firstly, a groove for placing the connecting conductor 3 is dug on the periphery of the tower pole, the groove depth is about 30cm, the distance between the inner side of the connecting conductor 3 and the outer wall of the tower pole is about 40cm, then one grounding electrode 1 is inserted into the fixing sleeve member 2, the fixing sleeve member 2 and the connecting conductor 3 are ensured to be in a horizontal posture or the grounding electrode 1 is ensured to be in a vertical posture through external auxiliary equipment, the head 12 of the pole is knocked, the body 11 of the pole is inserted into soil until the fixing sleeve member 2 is in contact with the head 12 of the pole, and then the head 12 of the pole is rotated by using a tool matched with the rotation adjusting groove 123, so that the concave part 122 of the head 12 of the pole is rotated to a position corresponding to the convex part 22 of the fixing sleeve member 2; then knocking the club head 12 again to ensure that the convex part 22 is completely inserted into the concave part 122, and the club head 12 is attached to the end face of the fixing sleeve 2; then, installing the screw 6 again, inserting the screw 6 into the installation hole 121, and screwing the screw 6 into the through hole thread 21 until the head part of the screw 6 is abutted with the rod head part 12 and cannot rotate continuously, so as to realize the detachable fixed connection of the rod head part 12 and the fixing sleeve part 2; after the rod head 12 and the fixing sleeve 2 are connected together, the anti-corrosion treatment can be performed by brushing asphalt or spraying anti-rust paint, so that the corrosion of the rod head is avoided. The installation manner of the grounding electrode 1 at other positions is the same as the installation manner described above, and will not be described again.

Example 2

Referring to fig. 5, this embodiment provides a lightning-protection grounding device for a distribution line, which is substantially the same as embodiment 1, and is different in that the connecting conductor 3 is not formed by splicing two arc plates 31, but is in a major arc structure, and the gap of the connecting conductor 3 is larger than the diameter of the lower part of the tower pole, so that the connecting conductor 3 can be conveniently and directly sleeved on the periphery of the tower pole, and the two arc plates 31 in embodiment 1 are not required to be welded together, so that the welding step is omitted, and the installation is more convenient. The connecting conductor 3 can be provided with 2 or 3 evenly distributed fixing sleeves 2. In this embodiment, 3 fixing kits 2 uniformly distributed on the connection conductor 3 are provided, so that the number of the fixing kits 2 is the largest and the ground resistance is the lowest under the condition of ensuring uniform distribution.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A distribution line lightning-arrest earthing device, characterized by comprising:

the grounding electrode (1) comprises a rod body part (11) and a rod head part (12) which are connected, wherein the diameter of the rod head part (12) is larger than that of the rod body part (11);

the fixing sleeve (2) is sleeved on the rod body part (11) and is detachably connected with the rod head part (12) through a screw (6);

the connecting conductor (3) is fixedly connected with the fixing sleeve (2);

and one end of the grounding conductor (4) is connected with the connecting conductor (3), and the other end of the grounding conductor is used for being connected with the lightning arrester (5).

2. The lightning-protection grounding device for the distribution line according to claim 1, wherein the rod head (12) is provided with a mounting hole (121), the fixing sleeve (2) is provided with through hole threads (21) corresponding to the mounting hole (121), and the fixing sleeve (2) and the rod head (12) are detachably connected through screws (6) which are arranged in the mounting hole (121) and are in threaded connection with the through hole threads (21).

3. The lightning-protection grounding device for the distribution line according to claim 1, wherein the end surface of the fixing sleeve (2) facing the head part (12) of the pole is provided with a protruding part (22), the end surface of the head part (12) facing the fixing sleeve (2) is provided with an inner concave part (122) matched with the protruding part (22), and the protruding part (22) is in plug-in fit with the inner concave part (122).

4. The lightning-protection grounding device for the distribution line according to claim 1, wherein an inner concave part (122) is arranged on the end face of the fixing sleeve part (2) facing the rod head part (12), a convex part (22) which is matched with the inner concave part (122) is arranged on the end face of the rod head part (12) facing the fixing sleeve part (2), and the convex part (22) is in plug-in fit with the inner concave part (122).

5. A distribution line lightning protection grounding device according to claim 3 or 4, characterized in that the cross section of the protruding portion (22) is semi-circular, trapezoidal or triangular.

6. The lightning-protection grounding device for a distribution line according to claim 5, wherein a rotation adjusting groove (123) is formed in an end surface of the rod head (12) away from the rod body (11).

7. The distribution line lightning-protection grounding device according to claim 1, characterized in that the end of the shaft portion (11) remote from the head portion (12) forms a pointed structure.

8. The lightning-protection grounding device for a distribution line according to claim 1, wherein the connecting conductor (3) has a ring-shaped structure, and the connecting conductor (3) is formed by splicing at least two arc-shaped plates (31).

9. Distribution line lightning-protection grounding device according to claim 8, characterized in that 2, 3, 4 or 5 evenly distributed fixing suites (2) are provided on the connection conductor (3).

10. The lightning-protection grounding device for a distribution line according to claim 1, wherein the connecting conductor (3) has a major arc structure, and 2 or 3 fixing kits (2) which are uniformly distributed are arranged on the connecting conductor (3).