CN219534884U - Lightning protection structure for pole with insulating cross arm - Google Patents

Abstract

The utility model relates to a lightning protection structure for an electric pole with an insulating cross arm, and belongs to the technical field of power distribution lightning protection. The technical proposal is as follows: the lightning arrester support (16) is arranged on the electric pole, and the lightning arrester insulator (19) is arranged on the lightning arrester support (16) through the lightning arrester base (27); the lightning arrester insulator is provided with a zinc oxide resistor piece (26), an angle electrode (23) is welded at the upper end of the zinc oxide resistor piece (26), the tail end of the angle electrode (23) is welded with a second arc extinguishing ball (24), and an insulating sleeve (25) is wrapped outside the middle part of the angle electrode (23); the arc striking rod is arranged at the upper end of the lightning arrester insulator, the first arc extinguishing ball is welded at the tail end of the arc striking rod, and the first insulating sleeve is wrapped outside the middle part of the arc striking rod. According to the utility model, under the condition that the original insulating cross arm is not changed, the lightning protection insulator and the lightning arrester with the discharge gap are arranged on the electric pole, so that the over-voltage and over-current damage to an insulating circuit caused by direct lightning strike is effectively prevented.

Description

Lightning protection structure for pole with insulating cross arm

Technical Field

The utility model relates to a lightning protection structure for an electric pole with an insulating cross arm, and belongs to the technical field of power distribution lightning protection.

Background

Under the condition that the 10kV insulated wire is struck by lightning, strong lightning current can enable the line to generate high temperature, but lightning breakage accidents are easy to occur due to poor heat dissipation conditions of the insulated wire. Through exploration and practice for several years, the insulated wire lightning protection technology is basically mature, such as lightning protection facilities of lightning protection insulators, lightning arresters and the like, and has good lightning protection effect. Along with the popularization and application of the insulating cross arm in the last two years, because the insulating cross arm belongs to insulating materials, lightning protection facilities (shown in figure 3) are installed at the positions which are not suitable for the insulating cross arm, the lightning protection insulator and the lightning arrester cannot be installed on the insulating cross arm, and the direct lightning stroke cannot be prevented from causing overvoltage and overcurrent damage to an insulating circuit.

Disclosure of Invention

The utility model aims to provide a lightning protection structure for an electric pole with an insulating cross arm, and under the condition that the original insulating cross arm structure is not changed, a lightning protection insulator and a lightning arrester with a lightning protection gap are arranged on the electric pole, so that overvoltage and overcurrent damage to an insulating circuit caused by direct lightning strike can be effectively prevented, and the problems existing in the background art are solved.

The technical scheme of the utility model is as follows:

the lightning protection structure for the electric pole with the insulating cross arm comprises a lightning arrester structure arranged on the lightning arrester arm, wherein the lightning arrester structure comprises the lightning arrester arm, an upper lead of the lightning arrester, a puncture wire clamp, a lightning arrester insulator, an arc striking rod, a first arc extinguishing ball, a first insulating sleeve, an angle electrode, a second arc extinguishing ball, a second insulating sleeve, a zinc oxide resistor sheet, a lightning arrester base, a second grounding lead, a second grounding electrode and an insulating cover; the lightning arrester insulator is provided with a zinc oxide resistor, the horn electrode is welded at the upper end of the zinc oxide resistor, the horn electrode is connected with the zinc oxide resistor, the tail end of the horn electrode is welded with a second arc extinguishing ball, the middle part of the horn electrode is wrapped with a second insulating sleeve, and the second insulating sleeve wraps two thirds of the arc extinguishing ball; the arc striking rod is arranged at the upper end of the lightning arrester insulator and is connected with an upper lead of the lightning arrester, the end of the arc striking rod is welded with an arc extinguishing ball I, an insulating sleeve I is wrapped outside the middle part of the arc striking rod, and the insulating sleeve I wraps two thirds of the arc extinguishing ball I; and the upper lead of the lightning arrester is connected with the insulated wire through a parallel hook puncture wire clamp, and an insulating cover is arranged outside the parallel hook puncture wire clamp.

Further, the arrester arm is held tightly on the electric pole through the anchor ear structure and is fixed through the bolt, and both ends of the arrester arm all are equipped with the arrester structure. The number of installed lightning arrester structures is matched with the number of insulated wires.

Further, the arrester structure is mounted on a tension pole or a corner pole.

Further, the lightning rod structure comprises a lower anchor ear, an upper anchor ear, a lightning rod body, a first needle body, a second needle body, a third needle body, a first grounding lead and a first grounding electrode, wherein the lightning rod body is arranged on the upper portion of the electric pole through the lower anchor ear and the upper anchor ear, the first needle body, the second needle body and the third needle body are arranged on the top of the lightning rod body, the first needle body is vertically arranged, the second needle body and the third needle body are respectively and obliquely arranged on two sides of the first needle body, and the bottom of the lightning rod body is connected with the first grounding electrode through the first grounding lead.

Further, the lightning rod body is the pipe, and lightning rod body lower extreme and down staple bolt and last staple bolt welding, lightning rod body upper end and needle body one, needle body two and needle body three welding.

Further, the first needle body, the second needle body and the third needle body are galvanized round steel, an included angle of 60 degrees is formed between the second needle body and the third needle body and the first needle body, a three-fork-needle-type lightning rod structure is adopted, the protection angle is enlarged on the periphery of the line, and the line is comprehensively lightning-protected.

Further, the lightning rod structure is arranged on the linear electric pole.

The utility model has the positive effects that: under the condition that the original insulating cross arm structure is not changed, a lightning protection insulator and a lightning arrester with a discharge gap are arranged on an electric pole, direct lightning overvoltage and overcurrent on a line are discharged into the ground through a grounding lead and a grounding electrode, and the direct lightning overvoltage and overcurrent damage to an insulating line is effectively prevented; meanwhile, the improved lightning arrester is not easy to be damaged by lightning, has long service life, reduces the times of power failure and reduces maintenance cost.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view of the structure of the lightning arrester of the present utility model;

FIG. 3 is a schematic view of a structure of a background insulating cross arm;

in the figure: the electric pole comprises a first electric pole 1, a linear insulating cross arm 2, an insulating wire 3, a lower hoop 4, an upper hoop 5, a lightning rod body 6, a first needle body 7, a second needle body 8, a third needle body 9, a first grounding lead 10, a first grounding electrode 11, a second electric pole 12, a third electric pole 13, a fourth electric pole 14, a tension-resistant insulating cross arm 15, a lightning arrester arm 16, an upper lightning arrester lead 17, a puncture wire clamp 18, a lightning arrester insulator 19, an arc striking rod 20, a first arc extinguishing ball 21, a first insulating sleeve 22, an angle electrode 23, a second arc extinguishing ball 24, a second insulating sleeve 25, a zinc oxide resistor 26, a lightning arrester base 27, a second grounding lead 28, a second grounding electrode 29 and an insulating cover 30.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

referring to fig. 1, a first pole 1, a second pole 12, a third pole 13 and a fourth pole 14 are sequentially arranged, the first pole 1, the second pole 12 and the third pole 13 are linear poles, a linear insulating cross arm 2 is arranged on the first pole 1, the second pole 12 and the third pole 13, the fourth pole 14 is a tension-resistant pole, and a tension-resistant insulating cross arm 15 is arranged on the fourth pole 14. In this embodiment, set up the lightning rod structure on pole one 1, set up the arrester structure on pole four 14, lightning rod structure and arrester structure combined action are through ground lead, earthing pole with the direct lightning overvoltage overcurrent on the circuit let into the earth, effectively prevent that direct lightning from causing overvoltage and overcurrent injury to insulated wire.

Referring to fig. 1, in this embodiment, the lightning rod structure includes a lower anchor ear 4, an upper anchor ear 5, a lightning rod body 6, a first needle body 7, a second needle body 8, a third needle body 9, a first grounding lead 10 and a first grounding electrode 11, where the lightning rod body 6 is disposed on an upper portion of the electric pole 1 through the lower anchor ear 4 and the upper anchor ear 5, and the lower anchor ear 4 and the upper anchor ear 5 are fastened by bolts. The top of lightning rod body 6 is equipped with first needle body 7, second needle body 8 and third needle body 9, and wherein the vertical setting of first needle body 7, second needle body 8 and third needle body 9 incline the setting respectively in first needle body 7 both sides, and the bottom of lightning rod body 6 is connected with earthing pole one 11 through earthing lead one 10.

In the embodiment, the lightning rod body 6 is a circular tube with the diameter of 30mm and the wall thickness of 3mm; the lower end of the lightning rod body 6 is welded with the lower anchor ear 4 and the upper anchor ear 5, and the interval between the lower anchor ear 4 and the upper anchor ear 5 is 500mm; the upper end of the lightning rod body 6 is welded with the first needle body 7, the second needle body 8 and the third needle body 9.

The first needle body 7, the second needle body 8 and the third needle body 9 are galvanized round steel, and the diameter is 18mm; the needle body I7 is vertically upwards arranged, and an included angle of 60 degrees is formed between the needle body II 8, the needle body III 9 and the needle body I7; the first grounding lead 10 is a copper insulated wire with the diameter of 25 mm; the number of the grounding poles 11 is two, and the grounding leads 10 are respectively connected with the two grounding poles 11.

According to the lightning rod structure, the grounding lead is connected to the first grounding electrode, the grounding point is increased, and the grounding effect is better. Meanwhile, the three-fork-shaped needle type lightning rod structure is adopted, the protection angle is increased on the periphery of the circuit, the circuit is comprehensively protected from lightning, the safe operation of the circuit is not affected, and a good lightning protection effect can be achieved.

Referring to fig. 2 (only one side of the arrester structure is shown in the drawing), the arrester structure in this embodiment has a discharge gap, and specifically comprises an arrester upper lead 17, a puncture wire clip 18, an arrester insulator 19, an arc striking rod 20, an arc extinguishing ball 21, an insulating sleeve one 22, an angle electrode 23, an arc extinguishing ball two 24, an insulating sleeve two 25, a zinc oxide resistor 26, an arrester base 27, a grounding lead two 28, a grounding electrode two 29 and an insulating cover 30, wherein the arrester arm 16 is mounted on an electric pole four 14 and is positioned below the tension-resisting insulating cross arm 15, the arrester insulator 19 is arranged on the arrester arm 16 through the arrester base 27, and the arrester base 27 is connected with the grounding electrode two 29 through the grounding lead two 28; the lightning arrester insulator 19 is provided with a zinc oxide resistor 26, the horn electrode 23 is welded at the upper end of the zinc oxide resistor 26, the horn electrode 23 is connected with the zinc oxide resistor 26, the tail end of the horn electrode 23 is welded with a second arc extinction ball 24, an insulating sleeve II 25 is wrapped outside the middle part of the horn electrode 23, and the second arc extinction ball 24 is wrapped by the insulating sleeve II 25 by two thirds; the arc striking rod 20 is arranged at the upper end of the lightning arrester insulator 19 and is connected with the lightning arrester upper lead 17, the end of the arc striking rod 20 is welded with an arc extinguishing ball I21, an insulating sleeve I22 is wrapped outside the middle part of the arc striking rod 20, and the insulating sleeve I22 wraps two thirds of the arc extinguishing ball I21; the arrangement of the first insulating sleeve 22 and the second insulating sleeve 25 prevents the first arc extinguishing ball 21 and the second arc extinguishing ball 24 from being completely exposed to prevent the accident of grounding. The upper lead 17 of the lightning arrester is connected with the insulated wire 3 through the parallel hook puncture clamp 18, and an insulating cover 30 is arranged outside the parallel hook puncture clamp 18.

Preferably, the lightning arrester arm 16 is tightly held on the electric pole through a hoop structure and is fixed through bolts, and the lightning arrester structure is arranged at two ends of the lightning arrester arm 16. The number of arrester structures matches the number of insulated conductors 3, and the number of arrester structures can be increased by increasing the arrester arms 16. For example, when the insulated wires 3 are three, two arrester arms 16 may be provided, wherein two ends of one arrester arm 16 are provided with arrester structures, one end of the other arrester arm 16 is provided with an arrester structure, and each insulated wire 3 is connected with an arrester upper lead 17 on the corresponding arrester structure through a puncture wire clamp 18.

In this embodiment, the second grounding lead 28 is a 25mm copper insulated wire; the number of the second grounding electrode 29 is two, and the second grounding lead 28 is respectively connected with the two second grounding electrodes.

According to the utility model, the first insulating sleeve 22 and the second insulating sleeve 25 are sleeved outside the first arc extinguishing ball 21 and the second arc extinguishing ball 24, so that the first arc extinguishing ball 21 and the second arc extinguishing ball 24 are not completely exposed, and the grounding accident caused by accidents is prevented. The horn electrode 23 is welded at the upper end of the zinc oxide resistor 26 and is connected with the zinc oxide resistor 26, when overvoltage is generated by lightning strike on a circuit, most of overvoltage and overcurrent are released through a discharge gap on a lightning arrester structure, then the overvoltage and overcurrent are filtered by the zinc oxide resistor and discharged into the ground, the lightning arrester structure is not easy to break down to cause damage, and the circuit is not easy to cause ground tripping power failure accidents.

The specific installation process of the utility model is as follows:

first step, the lower end of the lightning rod body 6 is welded with the lower anchor ear 4 and the upper anchor ear 5, and the interval between the lower anchor ear 4 and the upper anchor ear 5 is 50cm.

And secondly, welding a first needle body 7, a second needle body 8 and a third needle body 9 at the upper end of the lightning rod body 6, wherein the first needle body 7 is vertically upwards arranged, the second needle body 8 and the first needle body 7 are perpendicular to the line and form an included angle of 60 degrees, and the third needle body 9 and the first needle body 7 are perpendicular to the line and form an included angle of 60 degrees.

And thirdly, mounting the lightning rod body 6 on the tip of the pole 1 through the lower anchor ear 4 and the upper anchor ear 5, wherein the distance between the upper anchor ear 5 and the pole head is 10cm.

Fourth, the first grounding electrode 11 is crashed into the bottom of the first electric pole 1.

And fifthly, connecting the first grounding lead 10 with the lightning rod body 6 and the first grounding electrode 11 respectively.

Sixthly, welding an angle electrode 23 on the upper end of a zinc oxide resistor 26 and connecting the angle electrode 23 with the zinc oxide resistor 26, welding a second arc extinction ball 24 at the tail end of the angle electrode 23, wrapping the middle part of the angle electrode 23 by a second insulating sleeve 25, and wrapping the second insulating sleeve 25 by two thirds of the arc extinction ball 24;

seventh, welding the arc striking rod 20 at the upper end of the lightning arrester insulator 19 and connecting the arc striking rod 20 with the upper lead 17, wherein the tail end of the arc striking rod 20 is welded with an arc extinguishing ball I21, the middle part of the arc striking rod 20 is wrapped by an insulating sleeve I22, the insulating sleeve I22 wraps two thirds of the arc extinguishing ball I21, and the arc extinguishing ball I is not completely exposed to prevent an accident from being caused by grounding;

and eighth step, two lightning arrester arms 16 are arranged on the fourth pole 14 through a hoop structure, and the lightning arresters welded in the seventh step are arranged on the lightning arrester arms 16.

Ninth, the joint of the parallel hook puncture clamp 18, the insulated wire 3 and the upper lead 17 of the lightning arrester is covered by an insulating cover 30;

tenth, the second grounding electrode 29 is crashed into the bottom of the fourth pole 14.

Eleventh, the second grounding lead 28 is connected to the arrester base 27 and the second grounding electrode 29, respectively.

Claims (5)

1. Lightning protection structure for pole with insulating cross arm, its characterized in that: the lightning arrester comprises a lightning arrester structure arranged on a lightning arrester support (16), wherein the lightning arrester structure comprises a lightning arrester upper lead (17), a puncture wire clamp (18), a lightning arrester insulator (19), an arc striking rod (20), an arc extinguishing ball I (21), an insulating sleeve I (22), an angle electrode (23), an arc extinguishing ball II (24), an insulating sleeve II (25), a zinc oxide resistor (26), a lightning arrester base (27), a grounding lead II (28), a grounding electrode II (29) and an insulating cover (30), the lightning arrester support (16) is arranged on an electric pole, the lightning arrester insulator (19) is arranged on the lightning arrester support (16) through a lightning arrester base (27), and the lightning arrester base (27) is connected with the grounding electrode II (29) through the grounding lead II (28); the lightning arrester insulator (19) is provided with a zinc oxide resistor (26), the horn electrode (23) is welded at the upper end of the zinc oxide resistor (26), the horn electrode (23) is connected with the zinc oxide resistor (26), the tail end of the horn electrode (23) is welded with a second arc extinguishing ball (24), the middle part of the horn electrode (23) is wrapped with a second insulating sleeve (25), and the second insulating sleeve (25) wraps the second arc extinguishing ball (24) by two thirds; the arc striking rod (20) is arranged at the upper end of the lightning arrester insulator (19) and is connected with the upper lead (17) of the lightning arrester, the first arc extinguishing ball (21) is welded at the tail end of the arc striking rod (20), the first insulating sleeve (22) is wrapped outside the middle part of the arc striking rod (20), and the first insulating sleeve (22) wraps two thirds of the first arc extinguishing ball (21); the lightning arrester upper lead (17) is connected with the insulated wire (3) through a parallel hook puncture wire clamp (18), and an insulating cover (30) is arranged outside the parallel hook puncture wire clamp (18).

2. The lightning protection structure for an electric pole having an insulating cross arm according to claim 1, wherein: the lightning arrester arm (16) is tightly held on the electric pole through the anchor ear structure and is fixed through bolts, and both ends of the lightning arrester arm (16) are all provided with the lightning arrester structure.

3. The lightning protection structure for an electric pole having an insulating cross arm according to claim 1, wherein: still contain the lightning rod structure of setting on the pole, the lightning rod structure contains down staple bolt (4), goes up staple bolt (5), lightning rod body (6), first (7) of needle body, second (8) of needle body, third (9) of needle body, first (10) of ground lead and first (11) of ground electrode, lightning rod body (6) are equipped with first (7) of needle body, second (8) of needle body and third (9) of needle body through last staple bolt (5) setting on pole upper portion down, the top of lightning rod body (6) is equipped with, first (7) of needle body, wherein first (7) of needle body are vertical to be set up, and second (8) of needle body and third (9) of needle body slope set up respectively in first (7) both sides of needle body, and the bottom of lightning rod body (6) is connected with first (11) of ground lead through first (10) of ground lead.

4. A lightning protection structure for an electric pole having an insulating cross arm as claimed in claim 3, wherein: the lightning rod body (6) is a circular tube, the lower end of the lightning rod body (6) is welded with the lower anchor ear (4) and the upper anchor ear (5), and the upper end of the lightning rod body (6) is welded with the first needle body (7), the second needle body (8) and the third needle body (9).

5. The lightning protection structure for an electric pole having an insulating cross arm according to claim 4, wherein: the first needle body (7), the second needle body (8) and the third needle body (9) are galvanized round steel, and an included angle of 60 degrees is formed between the second needle body (8), the third needle body (9) and the first needle body (7).