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

A Lightning Protection Structure for Electric Pole with Insulated Cross Arm

technical field

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

Background technique

When the 10kV insulated wire is struck by lightning, the strong lightning current will cause the line to generate high temperature, but due to the poor heat dissipation conditions of the insulated wire, it is easy to cause a lightning strike disconnection accident. After several years of exploration and practice, the lightning protection technology of insulated wires is basically mature, such as lightning protection insulators and lightning arresters and other lightning protection facilities, which have played a very good lightning protection effect. With the popularization and application of insulating cross-arms in the past two years, because insulating cross-arms are made of insulating materials, there is no suitable location for installing lightning protection facilities on insulating cross-arms (as shown in Figure 3), and neither lightning insulators nor arresters can be installed on insulating cross-arms. It is impossible to prevent direct lightning strikes from causing overvoltage and overcurrent damage to insulated lines.

Utility model content

The purpose of this utility model is to provide a lightning protection structure for electric poles with insulating cross-arms, and install lightning-proof insulators and lightning arresters with lightning protection gaps on the electric poles without changing the original insulating cross-arm structure , can effectively prevent direct lightning strikes from causing overvoltage and overcurrent damage to insulated lines, and solve the above-mentioned problems in the background technology.

The technical scheme of the utility model is:

A lightning protection structure for electric poles with an insulating cross arm, comprising a lightning arrester structure arranged on the lightning arrester shoulder, the lightning arrester structure comprising the lightning arrester shoulder, the upper lead wire of the lightning arrester, the puncture wire clip, the lightning arrester insulator, the arc striking rod, and the arc suppression ball 1. Insulating bushing 1, angular electrode, arc suppressing ball 2, insulating bushing 2, zinc oxide resistance piece, lightning arrester base, grounding lead wire 2, grounding pole 2 and insulating cover. The lightning arrester is installed on the pole, and the lightning arrester The insulator is set on the shoulder of the arrester through the base of the arrester, and the base of the arrester is connected to the second grounding electrode through the second grounding lead; the insulator of the arrester is provided with a zinc oxide resistor, and the angular electrode is welded on the upper end of the zinc oxide resistor, and the angular electrode is connected to the zinc oxide Resistive sheet connection, arc-extinguishing ball two is welded at the end of the angular electrode, and insulating sleeve two is wrapped outside the middle of the angular electrode, and insulating sleeve two wraps two-thirds of the arc-extinguishing ball two; The upper end of the insulator is connected with the upper lead wire of the arrester. The arc-extinguishing ball 1 is welded at the end of the arc-starting rod, and the insulating sleeve 1 is wrapped from the middle of the arc-starting rod. The insulating sleeve 1 wraps the arc-extinguishing ball 1 by two-thirds; The upper lead wire of the lightning arrester is connected with the insulated wire through the parallel hook piercing clamp, and an insulating cover is arranged outside the parallel hook piercing clamp.

Further, the lightning arrester shoulder is tightly hugged on the electric pole through a hoop structure and fixed by bolts, and both ends of the lightning arrester shoulder are provided with lightning arrester structures. The installation quantity of the lightning arrester structure matches the quantity of the insulated wires.

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

Further, the utility model also includes a lightning rod structure arranged on the electric pole, and the lightning rod structure includes a lower hoop, an upper hoop, a lightning rod body, a needle body, a needle body two, a needle body three, a ground lead wire 1 and a ground wire Pole one, the lightning rod body is arranged on the upper part of the pole through the lower hoop and the upper hoop, and the top of the lightning rod body is provided with needle body one, needle body two and needle body three, wherein needle body one is vertically arranged, and needle body two and the needle body three are respectively obliquely arranged on both sides of the needle body one, and the bottom of the lightning rod body is connected to the ground electrode one through the ground lead one.

Further, the lightning rod body is a round tube, the lower end of the lightning rod body is welded to the lower hoop and the upper hoop, and the upper end of the lightning rod body is welded to the first, second and third pin bodies.

Further, the needle body 1, needle body 2 and needle body 3 are all galvanized round steel, the angle between the needle body 2 and the needle body 3 and the needle body 1 is 60 degrees, and the lightning rod structure of the trident needle body is adopted , increase the protection angle around the line, and provide all-round lightning protection.

Further, the lightning rod structure is arranged on the straight pole.

The positive effect of the utility model: without changing the structure of the original insulating cross-arm, a lightning protection insulator and a lightning arrester with a discharge gap are installed on the pole, and the direct lightning overvoltage and overcurrent on the line are passed through the grounding lead, The ground electrode leaks into the ground, which effectively prevents direct lightning strikes from causing overvoltage and overcurrent damage to insulated lines; at the same time, the improved arrester is not easily damaged by lightning, has a long service life, reduces the number of power outages, and reduces maintenance costs.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the utility model lightning arrester;

Fig. 3 is a schematic diagram of the structure of the insulating cross-arm in the background technology;

In the figure: pole one 1, straight insulated cross arm 2, insulated wire 3, lower hoop 4, upper hoop 5, lightning rod body 6, needle body 1 7, needle body 2 8, needle body 3 9, grounding lead 1 10. Ground pole 1 11, pole 2 12, pole 3 13, pole 4 14, tension insulation cross arm 15, arrester arm 16, arrester upper lead 17, puncture wire clip 18, arrester insulator 19, arc strike rod 20. Arc suppressing ball 1 21, insulating bushing 1 22, angular electrode 23, arc suppressing ball 2 24, insulating bushing 2 25, zinc oxide resistance sheet 26, arrester base 27, grounding lead 2 28, grounding pole 2 29, Insulation cover 30.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

In conjunction with accompanying drawing 1, electric pole one 1, electric pole two 12, electric pole three 13 and electric pole four 14 are arranged successively, electric pole one 1, electric pole two 12 and electric pole three 13 are straight electric poles, electric pole one 1 1. Electric pole two 12 and electric pole three 13 are provided with linear insulation cross arm 2, electric pole four 14 is a tension pole, and electric pole four 14 is provided with tension insulation cross arm 15. In this embodiment, a lightning rod structure is set on the pole 1, and a lightning arrester structure is set on the pole 4 14. The lightning rod structure and the lightning arrester structure work together to discharge the direct lightning overvoltage and overcurrent on the line through the grounding lead wire and the grounding electrode. It can effectively prevent direct lightning strikes from causing overvoltage and overcurrent damage to insulated lines.

With reference to Figure 1, the structure of the lightning rod in this embodiment includes a lower hoop 4, an upper hoop 5, a lightning rod body 6, a needle body 1 7, a needle body 2 8, a needle body 3 9, a grounding lead 10 and a grounding electrode 11 , the lightning rod body 6 is arranged on the upper part of the electric pole 1 through the lower hoop 4 and the upper hoop 5, and the lower hoop 4 and the upper hoop 5 are fastened by bolts. The top of the lightning rod body 6 is provided with a needle body 1 7, a needle body 2 8 and a needle body 3 9, wherein the needle body 1 7 is vertically arranged, and the needle body 2 8 and the needle body 3 9 are arranged obliquely on both sides of the needle body 1 7 respectively. , the bottom of the lightning rod body 6 is connected to the ground electrode one 11 through the ground lead one 10 .

In this embodiment, the lightning rod body 6 is a round tube with a diameter of 30 mm and a wall thickness of 3 mm; the lower end of the lightning rod body 6 is welded to the lower hoop 4 and the upper hoop 5, and the distance between the lower hoop 4 and the upper hoop 5 is 500 mm; the lightning rod The upper end of the 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 all galvanized round steels with a diameter of 18mm; The included angle is 60 degrees; the ground lead 10 is a 25mm² copper insulated wire; the ground electrode 11 is two, and the ground lead 10 is connected to the two ground electrodes 11 respectively.

In the utility model, the lightning rod structure is connected to the two grounding poles through the grounding lead one, so that the grounding point is increased, and the grounding effect is better. At the same time, the trident needle-type lightning rod structure is adopted to increase the protection angle around the line and provide all-round lightning protection, which will not affect the safe operation of the line, and can also play a good lightning protection effect.

Combined with accompanying drawing 2 (only one side of the arrester structure is shown in the figure), the arrester structure in this embodiment has a discharge gap, which specifically includes the upper lead wire 17 of the arrester, the puncture wire clamp 18, the arrester insulator 19, the arc striking rod 20, and the arc extinction Ball one 21, insulating bushing one 22, angular electrode 23, arc suppressing ball two 24, insulating bushing two 25, zinc oxide resistor sheet 26, arrester base 27, grounding lead two 28, grounding pole two 29 and insulating cover 30, The lightning arrester bearer 16 is installed on the electric pole four 14, and is located below the strain-resistant insulating cross arm 15. The lightning arrester insulator 19 is arranged on the lightning arrester bearer 16 through the lightning arrester base 27, and the lightning arrester base 27 is connected with the grounding lead wire 2 28 and the grounding pole 2 29. Connection; the arrester insulator 19 is provided with a zinc oxide resistor 26, the angular electrode 23 is welded to the upper end of the zinc oxide resistor 26, and the angular electrode 23 is connected to the zinc oxide resistor 26, and the end of the angular electrode 23 is welded with an arc-extinguishing ball Two 24, starting from the middle part of the angular electrode 23, wrap the insulating sleeve two 25, and the insulating sleeve two 25 wraps the arc-extinguishing ball two 24 for two-thirds; The upper lead wire 17 is connected, the arc-extinguishing ball-21 is welded at the end of the arc-starting rod 20, and the insulating sleeve-22 is wrapped outside from the middle of the arc-starting rod 20, and the insulating sleeve-22 wraps two-thirds of the arc-extinguishing ball-21; The setting of the insulating bushing one 22 and the insulating bushing two 25 makes the arc suppressing ball one 21 and the arc suppressing ball two 24 not fully exposed to prevent accidental grounding accidents. The upper lead wire 17 of the lightning arrester is connected to the insulated wire 3 through the parallel hook piercing clamp 18, and an insulating cover 30 is arranged outside the parallel hook piercing clamp 18.

Preferably, the lightning arrester shoulder 16 is fastened to the pole through a hoop structure and fixed by bolts, and both ends of the lightning arrester shoulder 16 are provided with lightning arrester structures. The number of arrester structures matches the number of insulated wires 3, and the number of arrester structures can be increased by increasing the arrester load 16. For example, when there are three insulated wires 3, two lightning arrester loads 16 can be provided, wherein an arrester structure is arranged at both ends of one lightning arrester load 16, and a lightning arrester structure is set at one end of the other lightning arrester load 16, and each insulated wire 3 is passed through the puncture The wire clips 18 are respectively connected with the upper lead wires 17 of the arrester on the corresponding arrester structure.

In this embodiment, the second grounding lead 28 is a 25mm² copper insulated wire; there are two second grounding electrodes 29, and the second grounding lead 28 is respectively connected to the two second grounding electrodes.

In the utility model, the first arc-extinguishing ball 21 and the second arc-extinguishing ball 24 are provided with the first insulating sleeve 22 and the second insulating sleeve 25, so that the first arc-extinguishing ball 21 and the second arc-extinguishing ball 24 will not be completely exposed to prevent accidental grounding accidents . The angular electrode 23 is welded on the upper end of the zinc oxide resistance piece 26 and connected with the zinc oxide resistance piece 26. When an overvoltage is generated by a lightning strike on the line, most of the overvoltage and overcurrent will be released through the discharge gap on the arrester structure, and then pass through the zinc oxide resistance piece. The resistor sheet filters and leaks into the ground, the structure of the arrester is not easy to be damaged by breakdown, and the circuit is not easy to cause grounding trip and power failure.

The concrete installation process of the present utility model is as follows:

In the first step, the lower end of the lightning rod body 6 is welded to the lower hoop 4 and the upper hoop 5, and the distance between the lower hoop 4 and the upper hoop 5 is 50 cm.

In the second step, the upper end of the lightning rod body 6 is welded to the needle body 1 7, the needle body 2 8 and the needle body 3 9, the needle body 1 7 is set upright, the needle body 2 8 is perpendicular to the line and is 60 to the needle body 1 7 degree angle, the needle body three 9 is perpendicular to the line and forms a 60 degree angle with the needle body one 7.

In the third step, the lightning rod body 6 is installed on the tip of the electric pole 1 through the lower hoop 4 and the upper hoop 5, and the upper hoop 5 is 10 cm away from the pole head.

The fourth step is to smash the ground electrode-11 into the bottom of the electric pole-1.

The fifth step is to connect the grounding lead 10 to the lightning rod body 6 and the grounding pole 11 respectively.

In the sixth step, the angular electrode 23 is welded on the upper end of the zinc oxide resistance sheet 26 and connected with the zinc oxide resistance sheet 26, the end of the angular electrode 23 is welded with an arc-extinguishing ball 24, and the middle part of the angular electrode 23 is wrapped with an insulating sleeve 225, Insulating sleeve two 25 and two-thirds of arc suppression ball two 24 wraps;

The seventh step is to weld the arc striker 20 on the upper end of the arrester insulator 19, and connect it to the upper lead wire 17 of the arrester. The end of the arc striker 20 is welded with an arc suppression ball 21, and the middle position of the arc striker 20 starts with an insulating sleeve 22 Wrap, insulating sleeve 1 22 and wrap arc suppressing ball 1 21 by two-thirds, so as not to be completely exposed to prevent accidental grounding accidents;

In the eighth step, the two lightning arresters 16 are installed on the electric pole four 14 through the hoop structure, and the lightning arresters welded in the seventh step are installed on the lightning arresters 16 .

In the ninth step, use an insulating cover 30 to cover the connection between the parallel hook piercing clamp 18 and the insulated wire 3 and the lead wire 17 on the arrester;

In the tenth step, smash the ground electrode 2 29 into the bottom of the pole 4 14 .

In the eleventh step, connect the grounding lead 2 28 to the arrester base 27 and the grounding pole 2 29 respectively.

Claims (5)

1. A lightning protection structure for electric poles with an insulating cross arm, characterized in that: it includes a lightning arrester structure arranged on the lightning arrester bearer (16), and the lightning arrester structure includes an upper lead wire (17) of the lightning arrester, a piercing wire clip (18 ), lightning arrester insulator (19), arc strike rod (20), arc suppressing ball one (21), insulating bushing one (22), angular electrode (23), arc suppressing ball two (24), insulating bushing two ( 25), zinc oxide resistor (26), lightning arrester base (27), grounding lead two (28), grounding pole two (29) and insulating cover (30), and the lightning arrester bearer (16) is installed on the pole, The lightning arrester insulator (19) is arranged on the lightning arrester shoulder (16) through the lightning arrester base (27), and the lightning arrester base (27) is connected to the grounding electrode 2 (29) through the grounding lead wire 2 (28); the lightning arrester insulator (19) is provided with Zinc oxide resistance sheet (26) is arranged, and angle electrode (23) is welded on zinc oxide resistance sheet (26) upper end, and angle electrode (23) is connected with zinc oxide resistance sheet (26), and the end of angle electrode (23) is welded with The arc suppressing ball two (24), from the middle of the angular electrode (23), wraps the insulating sleeve two (25) outside, and the insulating sleeve two (25) wraps the arc suppressing ball two (24) for two thirds; The arc rod (20) is set on the upper end of the arrester insulator (19) and connected to the upper lead wire (17) of the arrester. The end of the arc rod (20) is welded with an arc suppression ball (21), starting from the middle of the arc rod (20). Wrap the insulating sleeve 1 (22) outside, and the insulating sleeve 1 (22) wraps the arc suppressing ball 1 (21) by two-thirds; Conductor (3) is connected, and is provided with insulating cover (30) outside hook piercing wire clip (18). 2. A lightning protection structure for electric poles with insulating cross arms according to claim 1, characterized in that: the lightning arrester bearer (16) is tightly held on the electric pole through a hoop structure and fixed by bolts, and the lightning arrester Both ends of the bearer (16) are provided with arrester structures. 3. A lightning protection structure for electric poles with insulating cross arms according to claim 1, characterized in that it also includes a lightning rod structure arranged on the electric pole, and the lightning rod structure includes a lower hoop (4), Upper hoop (5), lightning rod body (6), needle body one (7), needle body two (8), needle body three (9), ground lead wire one (10) and ground electrode one (11), the The lightning rod body (6) is set on the upper part of the pole through the lower hoop (4) and the upper hoop (5), and the top of the lightning rod body (6) is provided with needle body one (7), needle body two (8) and needle body Three (9), wherein the needle body one (7) is vertically arranged, the needle body two (8) and the needle body three (9) are arranged obliquely on both sides of the needle body one (7), and the bottom of the lightning rod body (6) passes through Ground lead one (10) is connected with ground electrode one (11). 4. A lightning protection structure for electric poles with insulating cross arms according to claim 3, characterized in that: the lightning rod body (6) is a round tube, and the lower end of the lightning rod body (6) is connected to the lower hoop (4 ) and the upper hoop (5) are welded, and the upper end of the lightning rod body (6) is welded with the needle body one (7), the needle body two (8) and the needle body three (9). 5. A lightning protection structure for electric poles with an insulating cross arm according to claim 4, characterized in that: the first needle body (7), the second needle body (8) and the third needle body (9) are all Be galvanized round steel, form 60 degree angles between needle body two (8) and needle body three (9) and needle body one (7).