CN211266426U - Lightning-protection power transmission conductor protection device - Google Patents

Abstract

The utility model discloses a lightning protection electricity shielding failure transmission line protection device, including the conductive needle, insulation support, the needle body bottom plate, the lightning conductor, preformed armor rod protects lines and counter weight hammer, the conductive needle includes conductive needle upper segment and conductive needle hypomere, the top of conductive needle upper segment is located to the needle point of conductive needle, the insulation support is located to the conductive needle upper segment, the clearance has between conductive needle upper segment and the insulation support, preformed armor rod protects the periphery of lines winding at the lightning conductor, the conductive needle hypomere is fixed on the needle body bottom plate, two pipe clamps protect the both ends centre gripping of lines with preformed armor rod, the both ends of needle body bottom plate are fixed together with two pipe clamps respectively, the bottom that is located preformed armor rod between two pipe clamps protects the lines is fixed with counterweight construction bolt, a counter weight hammer is connected respectively on counterweight construction bolt's both sides, make through the counter weight hammer keep perpendicular upwards. The utility model discloses can solve the thunder and lightning and around attacking the problem that transmission line caused the tripping operation.

Description

A kind of protection device for lightning protection transmission wire

technical field

The utility model relates to the technical field of electric power equipment, in particular to a protection device for lightning protection and electric shielding power transmission conductors.

Background technique

At present, in order to protect the conductors of the transmission line from being struck by lightning (shielding), it is commonly used to set up lightning protection lines. Article 7 of the State Grid Corporation's enterprise standard Q/GDW 11452-2015 "Guidelines for Lightning Protection of Overhead Transmission Lines": The first use of lightning protection lines in the lightning protection design of transmission lines is recommended. Article 6.1.2 of my country's power industry standard DL/T 620-1997 "Overvoltage Protection and Insulation Coordination of AC Electrical Loads" stipulates that 110KV lightning protection lines should be erected along the entire line. In mountainous areas and areas with particularly strong lightning activities, it should be erected along the entire line. Double lightning protection lines; 220KV and above lines are set up with double lightning protection lines.

However, the lightning-inducing ability of the lightning protection line is insufficient. After various conventional lightning protection measures have been adopted in the transmission line, there are still many lightning-induced trips in the transmission line. According to the statistical results of trip times of transmission lines in foreign countries and in Fujian, Guangdong, Hubei, Northeast, and North China, among the trip times caused by various reasons, the number of trips caused by lightning strikes the first place in the total number of trips. Practice has proved that due to the insufficient lightning-inducing ability of the lightning protection wire, the transmission wire cannot be well protected, so the trip caused by the lightning shielding of the transmission wire is still a technical problem to be solved.

Utility model content

The purpose of the utility model is to propose a protection device for lightning protection transmission conductors, so as to solve the problem of tripping caused by lightning protection transmission conductors.

The utility model relates to a protection device for lightning protection and transmission conductors, comprising a conductive needle, an insulating sleeve, a needle body bottom plate, a lightning protection wire, a pre-twisted wire guard strip and a counterweight hammer, wherein the conductive needle comprises an upper section of the conductive needle and a lower section of the conductive needle, The needle tip of the conductive needle is arranged on the top of the upper section of the conductive needle, the upper section of the conductive needle is arranged in the insulating sleeve, and the bottom of the upper section of the conductive needle is fixed with the insulating sleeve by tightening screws , there is a gap between the upper section of the conductive needle and the insulating sleeve, the pre-twisted wire grommet is wound around the outer circumference of the lightning protection wire, the lower section of the conductive needle is fixed on the bottom of the needle body, and the two The pipe clamp clamps both ends of the pre-twisted wire guard strip, the two ends of the needle base plate are respectively fixed with the two pipe clamps, and the A counterweight mounting bolt is fixed on the bottom of the twisted wire protector, and two sides of the counterweight mounting bolt are respectively connected with a counterweight hammer, and the conductive needle is kept vertically upward by the counterweight hammer.

According to the protection device for lightning protection transmission conductors proposed by the utility model, the pre-twisted wire protection wire is wound around the outer circumference of the traditional lightning protection wire, the two ends of the pre-twisted wire protection wire are clamped by two pipe clamps, and then the two A needle body base plate is fixed between the pipe clamps, a conductive needle is installed on the needle body base plate, and the upper part of the conductive needle is set in an insulating sleeve, so as to realize the combination of an insulating tubular lightning rod and a lightning protection wire. Prevent the disappearance of space charge, so that the electric field in the local area near the upper section of the conductive needle is not weakened, keep the air near the needle tip continuously ionized, continuously generate space charge, and promote the continuous growth of the upward oncoming pilot discharge, so it can attract lightning strikes Significantly enhanced, and the lightning protection range and lightning protection effect have also been improved, which can effectively solve the problem of tripping caused by lightning shielding transmission wires.

In addition, according to the protection device for lightning protection and transmission wire protection provided by the present utility model, it can also have the following additional technical features:

Further, the surface of the pre-twisted wire guard strip is provided with concave curved stripes, and the surface of the pipe clip in contact with the pre-twisted wire guard strip is provided with convex curved stripes matching the concave curved stripes.

Further, the upper section of the conductive needle is threadedly connected to the lower section of the conductive needle, the bottom of the upper section of the conductive needle is provided with an external thread, and the top of the lower section of the conductive needle is provided with an internal thread matched with the external thread.

Further, the length of the upper section of the conductive needle is smaller than the length of the lower section of the conductive needle.

Further, the gap between the upper section of the conductive needle and the insulating sleeve is 1-5 mm.

Further, the outer side of the insulating sleeve is provided with a rain-proof skirt that is inclined downward, the inner diameter of the rain-proof skirt is the same as the outer diameter of the insulating sleeve, and the rain-proof skirt is the same as the insulating skirt. The sleeves are bonded together.

Further, the number of the rainproof skirts is 2-4.

Further, the pipe clamp is clamped and fixed on the pre-twisted wire girdle by fastening bolts, and the fastening bolts pass through the needle body bottom plate.

Further, the counterweight is connected with the installation bolt of the counterweight through the self-contained galvanized steel strand.

Further, the material of the conductive pin is any one of steel, aluminum alloy, and copper, the height of the conductive pin is 0.3-3 m, and the diameter of the conductive pin is 10-20 mm.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural diagram of a lightning protection power transmission wire protection device according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for the purpose of illustration only and are not intended to indicate or imply the referred device or Elements must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , the protection device for lightning protection transmission conductors proposed by an embodiment of the present invention includes a conductive needle 11 , an insulating sleeve 12 , a needle body bottom plate 13 , a lightning protection wire 14 , a pre-twisted wire protective wire 15 and Counterweight 16.

The conductive needle 11 includes an upper conductive needle section 111 and a lower conductive needle section 112 , and the tip of the conductive needle 11 is disposed on the top of the conductive needle upper section 111 . Preferably, the length of the upper section 111 of the conductive needle is smaller than the length of the lower section 112 of the conductive needle.

Wherein, the material of the conductive needles 11 is any one of steel, aluminum alloy, and copper. The total height of the conductive needles 11 depends on the voltage level and the span length of the transmission line. Preferably, the height of the conductive needles 11 is 0.3-3m , the diameter of the conductive needle is 10-20 mm. For example, the height of the conductive needle 11 is 2 m, the height of the upper section 111 of the conductive needle is 0.8 m, and the height of the lower section 112 of the conductive needle is 1.2 m.

The upper section 111 of the conductive needle is threadedly connected to the lower section 112 of the conductive needle, the bottom of the upper section 111 of the conductive needle is provided with an external thread, and the top of the lower section 112 of the conductive needle is provided with an internal thread matched with the external thread , in order to realize the threaded connection of the two.

The upper section 111 of the conductive needle is arranged in the insulating sleeve 12, and there is a gap between the upper section 111 of the conductive needle and the insulating sleeve 12. Preferably, the upper section 111 of the conductive needle and the insulating sleeve 12 have a gap. The gap between 12 is 1 to 5 mm. The height of the insulating sleeve 12 is slightly higher than the height of the upper section 111 of the conductive needle, for example, the height of the upper section 111 of the conductive needle is 0.8 m, and the height of the insulating sleeve 12 is 0.815 m.

The bottom of the upper section 111 of the conductive needle is fixed with the insulating sleeve 12 by fastening screws 17 . In addition, on the basis of tightening the screws 17, super glue can be used to bond the bottom of the upper section 111 of the conductive needle and the insulating sleeve 12 together.

The pre-twisted wire guard strip 15 is wound around the outer periphery of the lightning protection wire 14 , and the pre-twisted wire guard strip 15 can form a rigid structure together with the lightning protection wire 14 . The provision of pre-twisted wire guard strips 15 reduces the torsion force on the roots of the conductive needles 111 .

The lower section 112 of the conductive needle is fixed on the needle body base plate 13 , and can be specifically defined on the needle body base plate 13 by bolts.

The two pipe clamps 18 clamp both ends of the pre-twisted wire guard strip 15 , and the two ends of the needle body base plate 13 are respectively fixed with the two pipe clamps 18 . Specifically, the pipe clamp 18 is clamped and fixed on the pre-twisted wire grommet 15 by fastening bolts 20 , and the fastening bolt 20 passes through the needle body bottom plate 13 to realize the pre-twisted wire grommet 15 , the pipe clamp 18 and the needle body base plate 13 are fixed.

Preferably, the surface of the pre-twisted wire bead 15 is provided with concave curve stripes, and the surface of the pipe clip 18 in contact with the pre-twisted bead 18 is provided with a convex curve matching the concave curve stripes stripe.

A counterweight mounting bolt 19 is fixed to the bottom of the pre-twisted wire grommet 15 between the two pipe clips 18. Specifically, the counterweight mounting bolt 19 is arranged corresponding to the conductive needle 11, Two sides of the counterweight mounting bolt 19 are respectively connected with a counterweight 16 , and the conductive needle 11 is kept vertically upward by the counterweight 16 . Specifically, the counterweight 16 is connected to the counterweight mounting bolt 19 through its own galvanized steel strand 161 .

In this embodiment, the outer side of the insulating sleeve 12 is provided with a rain-proof skirt 21 which is inclined downward. The inner diameter of the rain-proof skirt 21 is the same as the outer diameter of the insulating sleeve 12. The skirt 21 is bonded to the insulating sleeve 12 . Preferably, the number of the rainproof skirts 21 is 2-4. The material of the rain-proof skirt 21 can be epoxy glass steel plate with a thickness of 4-6 mm. The outer diameter of the rain skirt 21 can be selected from 100mm to 150mm.

According to the protection device for lightning protection power transmission conductors proposed in this embodiment, the pre-twisted wire protective wire 15 is wound around the outer circumference of the traditional lightning protection wire 14, and the two ends of the pre-twisted wire protective wire 15 are clamped by two pipe clamps 18. Then, a needle body base plate 13 is fixed between the two pipe clamps 18, the conductive needle 11 is installed on the needle body base plate 13, and the upper section 111 of the conductive needle is arranged in the insulating sleeve 12, so as to realize the insulating tube type lightning rod and the The combination of lightning protection lines uses the insulating sleeve 12 to prevent the disappearance of space charges, so that the electric field in the local area near the upper section 111 of the conductive needle is not weakened, and the air near the needle tip is kept ionized continuously, and space charges are continuously generated, prompting the upward facing leader With the continuous growth of the discharge, the ability to attract lightning strikes is significantly enhanced, and the lightning protection range and lightning protection effect are also improved, which can effectively solve the problem of tripping caused by lightning around the transmission conductor.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (10)

1. A lightning-protection electric shielding failure transmission wire protection device is characterized by comprising a conductive needle, an insulating sleeve, a needle body bottom plate, a lightning conductor, a pre-twisted wire protection strip and a counterweight hammer, wherein the conductive needle comprises a conductive needle upper section and a conductive needle lower section, a needle point of the conductive needle is arranged at the top of the conductive needle upper section, the conductive needle upper section is arranged in the insulating sleeve, the bottom of the conductive needle upper section is fixed with the insulating sleeve through a fastening screw, a gap is formed between the conductive needle upper section and the insulating sleeve, the pre-twisted wire protection strip is wound on the periphery of the lightning conductor, the conductive needle lower section is fixed on the needle body bottom plate, two pipe clamps clamp the two ends of the pre-twisted wire protection strip, the two ends of the needle body bottom plate are respectively fixed with the two pipe clamps together, and an object mounting bolt is fixed at the bottom of the pre-twisted wire protection strip between the two counterweight pipe clamps, and two sides of the counterweight mounting bolt are respectively connected with a counterweight hammer, and the conductive needle is kept vertically upwards through the counterweight hammer.

2. The lightning protection surround-strike power conductor protection device according to claim 1, wherein the surface of the preformed armor wire strip is provided with concave curved stripes, and the surface of the pipe clamp in contact with the preformed armor wire strip is provided with convex curved stripes matching the concave curved stripes.

3. The lightning protection power shielding failure transmission conductor protection device according to claim 1, wherein the upper section of the conductive pin is in threaded connection with the lower section of the conductive pin, the bottom of the upper section of the conductive pin is provided with an external thread, and the top of the lower section of the conductive pin is provided with an internal thread matched with the external thread.

4. The lightning protection electrical surround stroke power conductor protection device of claim 3, wherein the length of the upper segment of the conductive pin is less than the length of the lower segment of the conductive pin.

5. The lightning protection power shielding failure transmission conductor protection device according to claim 1, wherein a gap between the upper section of the conductive pin and the insulating sleeve is 1-5 mm.

6. The lightning protection power shielding failure transmission conductor protection device according to claim 1, wherein the outer side of the insulating sleeve is provided with a rain skirt which is inclined downwards, the inner diameter of the rain skirt is the same as the outer diameter of the insulating sleeve, and the rain skirt is bonded with the insulating sleeve.

7. The lightning protection power shielding failure transmission conductor protection device according to claim 6, wherein the number of the rain-proof skirts is 2-4.

8. The lightning protection surround-strike power conductor protection device according to claim 1, wherein the tube clamp is clamped and fixed on the pre-twisted wire guard bar by a fastening bolt, and the fastening bolt penetrates through the needle body bottom plate.

9. The lightning protection surround-strike power conductor protection device of claim 1, wherein the counterweight is bolted to the counterweight mounting bolts by a self-contained galvanized steel strand.

10. The lightning protection power shielding failure transmission conductor protection device according to claim 1, wherein the conductive pins are made of any one of steel, aluminum alloy and copper, the height of the conductive pins is 0.3-3 m, and the diameter of the conductive pins is 10-20 mm.

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