CN210778065U - Multi-cavity arc blowing type lightning protection insulating cross arm - Google Patents
Multi-cavity arc blowing type lightning protection insulating cross arm Download PDFInfo
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- CN210778065U CN210778065U CN201922197636.0U CN201922197636U CN210778065U CN 210778065 U CN210778065 U CN 210778065U CN 201922197636 U CN201922197636 U CN 201922197636U CN 210778065 U CN210778065 U CN 210778065U
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- arc
- lightning protection
- cross arm
- insulating
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Abstract
The utility model relates to a multi-chamber arc blowing type lightning protection insulating cross arm, which comprises a cross arm body, wherein the cross arm body comprises an insulating core rod which runs through the setting, the outer side of the insulating core rod is provided with an insulating layer, the two ends of the insulating core rod are provided with a puncture wire clamp and a lever tower mounting base, one end of the insulating core rod, which is close to the puncture wire clamp, is provided with an arc striking electrode and a terminal electrode, an air gap is arranged between the arc striking electrode and the terminal electrode, the other side of the terminal electrode is provided with a lightning protection device, and the lightning protection device comprises an arc extinguish chamber and at least two electrode chambers which; the electrode chamber is internally provided with a bead-shaped electrode, the bead-shaped electrode is partially arranged in the arc extinguish chamber, the surface of the insulating layer is provided with an arc blowing channel communicated with the arc extinguish chamber, an insulator is arranged between the lightning protection device and the tower mounting base, the lightning protection device, the insulator and the cross arm body are integrally arranged, a pure air gap structure is adopted to be isolated from a power grid, the system voltage and the system operation overvoltage are not born, the reliability is enhanced, the service life is prolonged, and the maintenance cost is reduced.
Description
Technical Field
The utility model relates to an electric power system high tension transmission line lightning protection technical field, concretely relates to insulating cross arm of multicavity room arc blowing formula lightning protection.
Background
With the continuous and deep research of the lightning arrester of the power system line, the application of various novel lightning arresters is rapidly developed. The multi-chamber gap lightning arrester utilizes the characteristic that multi-section electric arcs are generated by gas gap discharge in a high-voltage technology to carry out lightning protection design.
In the practical application process, under the action of lightning impulse current, air in the cavity in the multi-cavity gap can expand rapidly under the action of combustion arc plasma to generate explosive force, and under the combined action of the explosive force and electromagnetic power, the arc blowing channel guides the energy of high-temperature and high-pressure gas to be rapidly and powerfully released to the atmospheric environment, so that the arc blowing and extinguishing effects are realized.
In the arc extinguishing process of the multi-cavity gap lightning protection device, the structural design of the arc blowing channel directly determines physical quantities such as the arc blowing direction, speed and pressure intensity of the lightning protection device, and the key physical quantities determine the capability of the lightning protection device for rapidly cutting off power frequency follow current and the time for recovering the insulation strength of a line, so that the lightning protection function of the lightning protection device is an effective judgment standard.
The existing multi-chamber arc blowing type lightning protection device adopts a split structure, a split structure is adopted between arc striking electrodes, a product body and the arc striking electrodes are respectively installed on a tower and an overhead line, a discharge gap needs to be adjusted in a field measurement mode, and the overhead line implementation procedure is very complex and is not suitable for operation. In addition, the outdoor operation condition is severe, the lead is waved by external environmental factors for a long time, and finally, the discharge gap is displaced, so that the arc striking and arc extinguishing effects are seriously influenced, even the functional failure of the product is caused, and the safe operation of a power supply line is seriously influenced.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an insulating cross arm of multicavity room arc blowing formula lightning protection.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a multi-cavity arc blowing type lightning protection insulating cross arm comprises a cross arm body, wherein the cross arm body comprises an insulating core rod which is arranged in a penetrating mode, an insulating layer is sleeved on the outer side of the insulating core rod, one end of the insulating core rod is provided with a puncture wire clamp, the other end of the insulating core rod is provided with a lever tower mounting base, one end, close to the puncture wire clamp, of the insulating core rod is provided with an arc striking electrode and a terminal electrode, an air gap is formed between the arc striking electrode and the terminal electrode, the other side of the terminal electrode is provided with a lightning protection device, and the lightning protection device comprises an arc extinguish chamber and at least two electrode chambers which are arranged in; arc extinguishing chambers and electrode chambers are staggered in sequence, bead type electrodes are arranged in the electrode chambers, bead type electrode parts are arranged in the arc extinguishing chambers, gaps between adjacent bead type electrodes are 0.5mm, an arc blowing channel communicated with the arc extinguishing chambers is arranged on the surface of the insulating layer, insulators formed by a plurality of insulating sheds are arranged between the lightning protection device and the pole tower mounting base, and the lightning protection device, the insulators and the cross arm body are integrally arranged.
The arc extinguish chamber has smooth inner wall surface and two openings communicated with the electrode chamber.
The diameter of the bead-type electrode is 10 mm.
And the axis of the arc blowing channel is collinear with the symmetry line of the two bead-type electrodes.
And a first electrode and a second electrode are respectively arranged at two ends of the lightning protection device.
The first electrode and the second electrode comprise a first flash joint, a second flash joint and a connector for connecting the first flash joint and the second flash joint.
The surface of the connecting body is provided with an anti-loosening convex-concave structure.
The first and second flashing heads are hemispherical and have a gap with the adjacent spherical electrode.
The utility model has the advantages that: the pure air gap structure is adopted to be isolated from a power grid, the system voltage and the system operation overvoltage are not born, the reliability is enhanced, the service life is prolonged, and the maintenance cost is reduced.
This product direct mount has had support, insulating and lightning protection three major functions concurrently on the shaft tower, practices thrift the cost greatly, reduces the circuit cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the first electrode of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
A multi-cavity arc blowing type lightning protection insulating cross arm comprises a cross arm body, wherein the cross arm body comprises an insulating core rod 2 which penetrates through the insulating core rod, an insulating layer 14 is sleeved on the outer side of the insulating core rod, one end of the insulating core rod is provided with a puncture wire clamp 1, the other end of the insulating core rod is provided with a lever tower mounting base 13, one end, close to the puncture wire clamp, of the insulating core rod is provided with an arc ignition electrode 7 and a terminal electrode 8, an air gap is formed between the arc ignition electrode and the terminal electrode, the other side of the terminal electrode is provided with a lightning protection device, and the lightning protection device comprises an arc extinguish chamber 4 and at least two electrode chambers which are arranged in; arc extinguishing chambers and electrode chambers are staggered in sequence, bead type electrodes 3 are arranged in the electrode chambers, bead type electrode parts are arranged in the arc extinguishing chambers, gaps between adjacent bead type electrodes are 0.5mm, an arc blowing channel 5 communicated with the arc extinguishing chambers is arranged on the surface of an insulating layer, insulators 6 formed by a plurality of insulating sheds are arranged between the lightning protection device and a tower mounting base, and the lightning protection device, the insulators and the cross arm body are integrally arranged.
The arc blowing channel 5 is arranged opposite to the direction of the arc striking electrode.
When lightning strike happens, the multi-cavity arc blowing lightning protection insulating cross arm receives indirect overvoltage, and an air gap between the arc striking electrode and the terminal electrode is broken down. The discharge phenomenon between the external electrodes then propagates to the interior of the multi-stage gap arc extinguishing system. At this time, the electrical gaps between all the middle bead-type metal electrodes are discharged one by one. The system converts a large arc generated by a high-power lightning overvoltage into a large number of small arcs, and the small arcs are discharged by a small arc extinguish chamber between two adjacent electrodes. The high-pressure gas generated by the arc chute during the discharge of the arc blows the arc into the surrounding air, thus extinguishing the arc. The maximum arc extinguishing time does not exceed 10 msec. The power grid can stably run, and the power supply system power failure or reclosing operation can be reduced.
The arc extinguish chamber has smooth inner wall surface and two openings communicated with the electrode chamber. The explosion chamber inner wall surface is slick and sly, and the inner wall is slick and sly, and when suffering the thunderbolt, explosion chamber inner wall charge distribution is even, does not have the charge accumulation effect, under the same gap voltage, is difficult to be punctured, can improve the circuit insulation level, especially on high voltage distribution network, can avoid lightning protection device frequent maloperation to discharge, arouses high voltage distribution network voltage to seriously descend, leads to distribution network voltage fluctuation to influence distribution quality.
Simultaneously can add in the arc extinguish chamber and increase and climb the groove for the creepage distance between the extension adjacent electrode improves the inside surface flashover voltage of explosion chamber, ensures that overvoltage flashover takes place on the shortest physical link route between the adjacent electrode at every turn, makes the explosion chamber lightning impulse action voltage value discreteness at every turn little. Especially when the arc extinguish chamber is spherical, the arc extinguish chamber has the same volume, the spherical area is the smallest, the creepage distance is the shortest, and the added creepage increasing groove can effectively improve the insulation grade of the line.
The arc extinguishing chambers are designed to be groove type, so that the cross arc spraying phenomenon between the adjacent arc extinguishing chambers can be eliminated, and the durability is improved.
When the diameter of the bead-shaped electrode is 10mm and the gap is 0.5mm, the bead-shaped electrode has the best arc extinguishing effect.
And the axis of the arc blowing channel is collinear with the symmetry line of the two bead-type electrodes.
And a first electrode and a second electrode are respectively arranged at two ends of the lightning protection device.
The first electrode and the second electrode comprise a first flash connector 9, a second flash connector 11 and a connecting body 10 for connecting the two.
The surface of the connecting body is provided with an anti-loosening convex-concave structure 12 which plays a role in fixing. The connecting part cross-section is less than the first sudden strain of a muscle joint maximum cross-section, is less than the second sudden strain of a muscle joint maximum cross-section. Namely, the section of the upper electrode or the lower electrode is in a structure with two convex ends and a concave middle.
The first and second flashing heads are hemispherical and have a gap with the adjacent spherical electrode.
The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.
Claims (8)
1. The utility model provides an insulating cross arm of multicavity room arc blowing formula lightning protection, its includes the cross arm body, its characterized in that: the cross arm body comprises an insulating core rod which is arranged in a penetrating mode, an insulating layer is sleeved on the outer side of the insulating core rod, one end of the insulating core rod is provided with a puncture wire clamp, the other end of the insulating core rod is provided with a lever tower mounting base, one end, close to the puncture wire clamp, of the insulating core rod is provided with an arc striking electrode and a terminal electrode, an air gap is formed between the arc striking electrode and the terminal electrode, the other side of the terminal electrode is provided with a lightning protection device, and the lightning protection device comprises an arc extinguish chamber and at least two electrode chambers which are arranged in the; arc extinguishing chambers and electrode chambers are arranged in sequence in a staggered mode, bead type electrodes are arranged in the electrode chambers, one part of each bead type electrode is arranged in each arc extinguishing chamber, gaps between adjacent bead type electrodes are 0.5mm, an arc blowing channel communicated with the arc extinguishing chambers is arranged on the surface of each insulating layer, insulators formed by a plurality of insulating sheds are arranged between the lightning protection device and the tower mounting base, and the lightning protection device, the insulators and the cross arm body are integrally arranged.
2. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 1, characterized in that: the arc extinguish chamber has smooth inner wall surface and two openings communicated with the electrode chamber.
3. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 1, characterized in that: the diameter of the bead-type electrode is 10 mm.
4. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 1, characterized in that: and the axis of the arc blowing channel is collinear with the symmetry line of the two bead-type electrodes.
5. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 1, characterized in that: and a first electrode and a second electrode are respectively arranged at two ends of the lightning protection device.
6. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 5, characterized in that: the first electrode and the second electrode comprise a first flash joint, a second flash joint and a connector for connecting the first flash joint and the second flash joint.
7. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 6, wherein: the surface of the connecting body is provided with an anti-loosening convex-concave structure.
8. The multi-chamber arc-blowing lightning protection insulating cross arm according to claim 6, wherein: the first and second flashing heads are hemispherical and have a gap with the adjacent spherical electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922197636.0U CN210778065U (en) | 2019-12-10 | 2019-12-10 | Multi-cavity arc blowing type lightning protection insulating cross arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922197636.0U CN210778065U (en) | 2019-12-10 | 2019-12-10 | Multi-cavity arc blowing type lightning protection insulating cross arm |
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| Publication Number | Publication Date |
|---|---|
| CN210778065U true CN210778065U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922197636.0U Expired - Fee Related CN210778065U (en) | 2019-12-10 | 2019-12-10 | Multi-cavity arc blowing type lightning protection insulating cross arm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909741A (en) * | 2021-01-22 | 2021-06-04 | 国网福建省电力有限公司南平市延平区供电公司 | Multi-chamber lightning arrester suitable for high-resistance mountainous area and production process thereof |
-
2019
- 2019-12-10 CN CN201922197636.0U patent/CN210778065U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909741A (en) * | 2021-01-22 | 2021-06-04 | 国网福建省电力有限公司南平市延平区供电公司 | Multi-chamber lightning arrester suitable for high-resistance mountainous area and production process thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 Termination date: 20211210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |