阅读说明：本技术 一种单反冲对吹灭弧装置 (Single-recoil opposite-blowing arc-extinguishing device ) 是由 王巨丰 王嬿蕾 卢杨 陈宇宁 谭思源 杨子童 李庆一 张镱义 黄萍 何琪文 郭克 于 2021-04-23 设计创作，主要内容包括：本发明公开了一种单反冲对吹灭弧装置,属于防雷灭弧技术领域,包括绝缘子串、上端固定装置、下端固定装置、上端反冲装置和下端反冲装置,上端固定装置和下端固定装置平行设置在绝缘子串的两端。本发明具有双向动态绝缘配合能力,确保在正常工作时不降低原有线路的绝缘强度和耐雷水平,在雷击条件下,反冲管绝缘配合距离自动降低,优先被击穿,避免发生绝缘子闪络,具有双反冲截断冲击电弧能力,经过反冲作用降低了雷击电流强度,弱化冲击电弧电离强度,增加电弧脆弱性和易短性,防雷的性价比提高。在发生恶性突变之前能够及时处理,避免雷击对避雷器的损坏,维修成本降低,对线路的保护程度提高。(The invention discloses a single-recoil-pair arc blowout device, which belongs to the technical field of lightning protection and arc extinction and comprises an insulator string, an upper end fixing device, a lower end fixing device, an upper end recoil device and a lower end recoil device, wherein the upper end fixing device and the lower end fixing device are arranged at two ends of the insulator string in parallel. The invention has bidirectional dynamic insulation matching capability, ensures that the insulation strength and lightning resistance level of the original circuit are not reduced during normal work, automatically reduces the insulation matching distance of the recoil pipe under the condition of lightning stroke, is preferentially punctured, avoids insulator flashover, has double-recoil cut-off impact electric arc capability, reduces the lightning stroke current strength through the recoil action, weakens the impact electric arc ionization strength, increases the electric arc fragility and shortness, and improves the cost performance of lightning protection. The lightning arrester can be timely treated before malignant mutation, damage of lightning stroke to the lightning arrester is avoided, maintenance cost is reduced, and the protection degree of a line is improved.)

1. The utility model provides a single recoil is to blowing arc control device which characterized in that: including insulator chain (1A), upper end fixing device (2A), lower extreme fixing device (3A), upper end recoil device (5A) and lower extreme recoil device (6A), upper end fixing device (2A) and lower extreme fixing device (3A) parallel arrangement are at the both ends of insulator chain (1A), upper end recoil device (5A) sets up on upper end fixing device (2A), lower extreme recoil device (6A) sets up on lower extreme fixing device (3A), upper end recoil device (5A) and lower extreme recoil device (6A) set up on the same vertical line, and the recoil mouth sets up relatively.

2. A single recoil pair arc extinguishing device according to claim 1, wherein: one end of the upper end fixing device (2A) is fixed at the upper end of the insulator string (1A), one end of the lower end fixing device (3A) is fixed at the lower end of the insulator string (1A), and the upper end fixing device and the lower end fixing device are both perpendicular to the insulator string (1A).

3. A single recoil pair blowout arc device according to claim 2, wherein: the upper end recoil device (5A) is fixed at one end of the upper end fixing device (2A) through a fixing screw rod (4A), and the lower end recoil device (6A) is fixed at one end of the lower end fixing device (3A) through a fixing screw rod (4A).

4. A single recoil pair blowout arc device according to claim 2, wherein: the upper end fixing device (2A) and the lower end fixing device (3A) are both arranged to be hardware fittings and made of metal or conducting materials, the upper end backflushing device (5A) and the lower end backflushing device (6A) are both arranged to be single backflushing or multi-stage backflushing devices, and skirt rims are arranged outside the upper end backflushing device (5A) and the lower end backflushing device (6A).

5. A single recoil pair arc extinguishing device according to claim 1, wherein: upper end recoil device (5A) and lower extreme recoil device (6A) all include ceramic body (1), top cover plate (2), fixing device (4), bottom cover plate (5), insulating overburden (6) and shirt rim (7), top cover plate (2) set up the top at ceramic body (1), bottom cover plate (5) set up the bottom at ceramic body (1), fixing device (4) pass top cover plate (2) and bottom cover plate (5), and fixed the setting, insulating overburden (6) set up the outside at ceramic body (1), shirt rim (7) set up the outside at insulating overburden (6), be provided with recoil orifice (8) on top cover plate (2).

6. A high strength recoil tube structure according to claim 5, wherein: the ceramic tube body (1) is internally provided with a hollow cylindrical structure, and the internal hollow hole of the ceramic tube body (1) and the recoil spray hole (8) are arranged on the same straight line.

7. A high strength recoil tube structure according to claim 5, wherein: the top cover plate (2) comprises a top cover plate cover (2.1) and a top cover plate edge (2.2), the top cover plate cover (2.1) is arranged to be of an upward concave structure, and the top cover plate edge (2.2) is arranged on the side edge of the bottom of the top cover plate cover (2.1).

8. A high strength recoil tube structure according to claim 5, wherein: bottom portion cover board (5) include end cover board upper shield (5.1) and end cover board edgewise (5.2), end cover board upper shield (5.1) set up to undercut structure, end cover board edgewise (5.2) set up on the top side of end cover board upper shield (5.1), top cover board upper shield (2.1) cover is established at the top of ceramic body (1), end cover board upper shield (5.1) cover is established in the bottom of ceramic body (1), top cover board edgewise (2.2) and end cover board upper shield (5.1) set up to circular structure, and the internal diameter is the same with the external diameter of ceramic body (1), insulating overburden (6) set up to the epoxy layer, cover at insulating screw rod, nut (3), top cover board edgewise (2.2) and end cover board upper shield (5.1), and inclusion ceramic body (1).

9. A high strength recoil tube structure according to claim 8, wherein: fixing device (4) sets up to insulating screw rod, all is provided with the screw of the same quantity and size on lamina tecti border (2.2) and the lamina tecti ways (5.1), and insulating screw rod passes the screw and sets up nut (3) and screws up the setting.

10. A high strength recoil tube structure according to claim 9, wherein: the top cover plate (2) and the bottom cover plate (5) are steel plates or zinc alloy plates, the bottom cover plate sleeve cover (5.1) bottom of the bottom cover plate sleeve cover (5) is provided with a fixed pier (9), the bottom of the fixed pier (9) is provided with an invaginated screw hole, and the fixed pier (9) is made of a conductive material and is integrally arranged with the bottom cover plate sleeve cover (5.1).

Technical Field

The invention relates to the technical field of electronics, in particular to a single-recoil pair arc extinguishing device.

Background

Lightning disasters are one of the most serious meteorological disasters, and the combined country textbook organization has listed lightning strokes as the third natural disasters of the destructive power of the nature, which can endanger the life safety of human beings and animals and destroy various buildings, and the lightning strokes form serious threats to the safety of national economy and human life.

Lightning has great harm to the safe operation of a power transmission line, and insulator flashover accidents are often caused. Impact flashover caused by lightning strike of a power transmission line causes flashover of a line insulator, then generates large power frequency follow current, damages an insulator string and hardware fittings, and can possibly cause the insulator string to be burnt and the overhead conductor to break in serious cases. Generally, a single-recoil arc extinguishing device is used for arc extinguishing, and at present, the single-recoil arc extinguishing device can attenuate partial lightning current and reduce the intensity of lightning stroke. In order to extinguish electric arcs more quickly and ensure the running safety of a power transmission line, a single-recoil opposite-blowing arc extinguishing device is provided.

Disclosure of Invention

The invention aims to provide a single-recoil opposite-blowing arc-extinguishing device, which solves the technical problems that the existing insulator lacks the rapid arc-extinguishing capability, the flashover of a line insulator is easy to occur, large power frequency follow current is generated, and an insulator string and hardware fittings are damaged.

The utility model provides a single recoil is to blowing out arc device, includes insulator chain, upper end fixing device, lower extreme fixing device, upper end recoil device and lower extreme recoil device, and upper end fixing device and lower extreme fixing device parallel arrangement are at the both ends of insulator chain, and the upper end recoil device sets up on the upper end fixing device, and the lower extreme recoil device sets up on the lower end fixing device, and upper end recoil device and lower extreme recoil device set up on the same vertical line, and the recoil mouth sets up relatively.

Furthermore, one end of the upper end fixing device is fixed at the upper end of the insulator string, and one end of the lower end fixing device is fixed at the lower end of the insulator string and is perpendicular to the insulator string.

Furthermore, the upper end backflushing device is fixed at one end of the upper end fixing device through a fixing screw rod, and the lower end backflushing device is fixed at one end of the lower end fixing device through a fixing screw rod.

Further, the upper end fixing device and the lower end fixing device are both set to be hardware fittings and made of metal or conducting materials.

Furthermore, the upper end backflushing device and the lower end backflushing device are both set to be single backflushing devices or multi-stage backflushing devices, and skirt rims are arranged outside the upper end backflushing device and the lower end backflushing device.

The upper end backflushing device and the lower end backflushing device respectively comprise a ceramic pipe body, a top cover plate, a fixing device, a bottom cover plate, an insulating cover layer and a skirt edge, the top cover plate is arranged at the top of the ceramic pipe body, the bottom cover plate is arranged at the bottom of the ceramic pipe body, the fixing device penetrates through the top cover plate and the bottom cover plate and is fixedly arranged, the insulating cover layer is arranged on the outer side of the ceramic pipe body, the skirt edge is arranged on the outer side of the insulating cover layer, and backflushing spray holes are formed in the top cover plate.

Further, the ceramic tube body is internally provided with a hollow cylindrical structure, and the hollow hole and the recoil spray hole in the ceramic tube body are arranged on the same straight line.

Further, top cover plate includes top cover plate upper shield and top cover plate edgewise, and the top cover plate upper shield sets up to the sunk structure that makes progress, and the top cover plate edgewise sets up on the bottom side of top cover plate upper shield.

Further, bottom cover plate includes end cover board upper shield and end cover board border, and the end cover board upper shield sets up to undercut structure, and the end cover board border sets up on the top side of end cover board upper shield.

Furthermore, fixing device sets up to insulating screw rod, all is provided with the screw of the same quantity and size on lamina tecti edgewise and the bottom apron ways, and insulating screw rod passes the screw and sets up the nut and screws up the setting.

Further, the top cover plate sleeve is sleeved at the top of the ceramic pipe body, the bottom cover plate sleeve is sleeved at the bottom of the ceramic pipe body, the edge of the top cover plate and the bottom cover plate sleeve are arranged to be of a circular structure, and the inner diameter of the top cover plate is the same as the outer diameter of the ceramic pipe body.

Further, the insulating covering layer is arranged to be an epoxy resin layer, covers the insulating screw rod, the nut, the edge of the top cover plate and the bottom cover plate and covers the insulating screw rod, the nut, the edge of the top cover plate and the bottom cover plate, and comprises the ceramic pipe body.

Further, the top sleeve cover plate and the bottom sleeve cover plate are steel plates or zinc alloy plates.

Furthermore, a fixing pier is arranged at the bottom of the bottom cover plate sleeve cover of the bottom cover plate, an invaginated screw hole is formed in the bottom of the fixing pier, and the fixing pier is made of a conductive material and is integrally arranged with the bottom cover plate sleeve cover.

By adopting the technical scheme, the invention has the following technical effects:

(1) the invention has bidirectional dynamic insulation matching capability, ensures that the insulation strength and lightning resistance level of the original circuit are not reduced during normal work, automatically reduces the insulation matching distance of the recoil pipe under the condition of lightning stroke, is preferentially punctured, avoids insulator flashover, has double-recoil cut-off impact electric arc capability, reduces the lightning stroke current strength through the recoil action, weakens the impact electric arc ionization strength, increases the electric arc fragility and shortness, and improves the cost performance of lightning protection. The lightning arrester can be timely treated before malignant mutation occurs, so that the lightning arrester is prevented from being damaged by lightning, the maintenance cost is reduced, and the protection degree of a line is improved;

(2) the recoil device enhances the stability of a recoil arc extinguishing structure, increases the air tightness of the device, avoids gas leakage in the recoil process, concentrates recoil energy on electric arcs, more effectively reduces lightning current, when the electric arcs approach the recoil device, a plurality of different-sign charges are accumulated on the surface of a steel plate to form a local field area, and plays a role of lightning induction through coulomb force, so that the electric arcs are discharged through a recoil channel preferentially. Meanwhile, the steel plate at the lower end of the recoil pipe plays a role of a good conductor, the current after attenuation can be smoothly guided into the grounding electrode, the strength of the recoil pipe can be greatly enhanced by sleeving the front metal plate and the rear metal plate, the condition of breakage in the recoil process is avoided, and the service life is prolonged.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a cross-sectional view of the recoil assembly structure of the present invention.

FIG. 3 is a top view of the recoil assembly structure of the present invention without the mounting skirt and epoxy.

FIG. 4 is a schematic diagram of a top cover plate structure of the recoil unit structure of the present invention.

FIG. 5 is a schematic diagram of a bottom cover plate structure of the recoil unit structure of the present invention.

FIG. 6 is a cross-sectional view of a recoil assembly structure of the present invention in a single recoil configuration.

Reference numbers in the figures: 1A-insulator string; 2A-upper end fixing device; 3A-lower end fixing means; 4A-fixing the screw rod; 5A-upper end back flushing device; 6A-lower end back flushing device; 1-a ceramic tube body; 2-top cover plate; 2.1-covering the top cover plate; 2.2-the top cover plate edge; 2.3-fixing holes along the edges of the top cover plate; 3-a nut; 4-a fixing device; 5-covering the cover plate at the bottom; 5.1-covering the bottom cover plate; 5.2-bottom cover plate edge; 5.3-fixing holes along the edges of the bottom cover plate; 6-insulating cover layer; 7-skirt edge; 8-backflushing spray holes; 9-fixing the pier; 10-screw hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments are given and the present invention is described in further detail. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

The utility model provides a single recoil is arc extinguishing device to blowing, as shown in fig. 1, including insulator chain 1A, upper end fixing device 2A, lower extreme fixing device 3A, upper end recoil device 5A and lower extreme recoil device 6A, upper end fixing device 2A and lower extreme fixing device 3A parallel arrangement are at insulator chain 1A's both ends, upper end recoil device 5A sets up on upper end fixing device 2A, lower extreme recoil device 6A sets up on lower extreme fixing device 3A, upper end recoil device 5A and lower extreme recoil device 6A set up on the same vertical line, and the recoil mouth sets up relatively.

In the embodiment of the invention, one end of an upper end fixing device 2A is fixed at the upper end of an insulator string 1A, and one end of a lower end fixing device 3A is fixed at the lower end of the insulator string 1A and is both perpendicular to the insulator string 1A.

In the embodiment of the invention, the upper end backflushing device 5A is fixed at one end of the upper end fixing device 2A through the arrangement of the fixing screw rod 4A, and the lower end backflushing device 6A is fixed at one end of the lower end fixing device 3A through the arrangement of the fixing screw rod 4A.

In the embodiment of the present invention, the upper end fixing device 2A and the lower end fixing device 3A are both made of metal or conductive material.

In the embodiment of the invention, the upper recoil device 5A and the lower recoil device 6A are both single recoil or multi-stage recoil devices, and skirt rims are arranged outside the upper recoil device 5A and the lower recoil device 6A.

The top end of the single recoil device is provided with a recoil pipe, the recoil pipe is not filled with a plasma conductor under the power frequency condition, and the recoil pipe is an insulator, so that the lightning resistance level of the insulator string is not influenced. Under the lightning stroke condition, the insulation matching distance of the recoil pipe is automatically reduced, the lightning stroke flashover distance is shortest in the full-gear distance range, the breakdown time is fastest, the breakdown voltage is lowest, and lightning is discharged through the recoil channel preferentially.

Intermittent discharge at the stage of forming an impact arc is cut off by a recoil arc extinguishing mechanism, the integrity of an arc building channel is damaged, and the arc building process is inhibited. The impact arc entering the interior of the recoil tube is greatly attenuated due to the following reasons:

synchronization of arc tapering and recoil generation: the arc is poured into the recoil thin tube along with the pouring of the arc, the arc form is thinned, the axial pressure is synchronously increased, and the recoil is generated by the inlet and the outlet of the tube to generate arc cutting. Synchronization of arc tapering with ohmic power temperature rise: the arc thinning is accompanied by the increase of the resistance value of the arc and the synchronous increase of the ohmic power value and the heat value, and the arc directional back impulse caused by the temperature difference and the pressure difference is also synchronously generated. Increased frictional heating due to arc thinning: the frictional heating has delayed and great property, can continuously and permanently provide high-pressure and high-temperature heat sources and generate strong directional recoil force. The electric arc and the high-pressure friction heating of the inner wall of the tube are increased: the high-speed friction between the thinned electric arc and the high-strength pressure of the inner wall of the urban harbor generates huge heat, and high-temperature expansion recoil force is formed. The wrapping property is serious; the radiation, conduction and convection channels of the high-temperature electric arc in the recoil pipe are all closed except the inlet, so that the electric arc wrapping temperature rise is formed, and the recoil force is assisted. Cavity effect of directional recoil airflow on the arc outside the outlet: the huge thrust of the recoil electric arc is used for hollowing out the outer electric arc at the outlet in a large scale to form large-scale crushing fracture of the outer electric arc. Under the superposition of the six forces, the combined arc extinguishing action of the fast force, the medium force and the slow force is formed.

When the tower is struck by lightning, the electric arc inevitably enters an arc extinguishing channel formed by the back flushing pipe due to the accumulation of plasma at the pipe orifice of the back flushing pipe. The recoil of the recoil pipe acts on the electric arc, so that the stay time of the electric arc in the recoil pipe is prolonged, the energy release time is prolonged, and the damage of instantaneous heavy current to electronic equipment and buildings is reduced.

The single recoil device consists of a recoil pipe, an umbrella skirt and a fixed screw rod. The recoil arc-extinguishing tube is made of a high-strength high-temperature-resistant high-pressure-resistant non-conductive material and is a core module for realizing a recoil process. The umbrella skirt increases the arc creepage distance, and ensures the overlapping of the lightning flashover path and the recoil arc extinguishing channel. The fixing screw is connected with the hardware fitting and is arranged on the tower.

As shown in fig. 1, a recoil arc extinguishing path capable of recoil arc extinguishing is designed. The two ends of the insulator string are respectively connected with a single recoil device in parallel, under the condition of lightning stroke, a recoil pipe orifice forms plasma through lightning wave corona and fills the recoil pipe, the effect of extending a lower electrode and changing insulation matching is achieved, the insulation strength of a gap is reduced, the discharge voltage of a recoil convection blow channel is lower than that of an insulator (string), a recoil arc-extinguishing channel preferentially breaks down to discharge, and an arc path is ensured to be in an arc-extinguishing channel. The recoil of the recoil pipe acts on the electric arc, so that the stay time of the electric arc in the recoil pipe is prolonged, and the energy of the electric arc is greatly attenuated after the electric arc passes through the recoil pipe.

As shown in fig. 2-3, each of the upper end back flushing device 5A and the lower end back flushing device 6A includes a ceramic pipe 1, a top cover plate 2, a fixing device 4, a bottom cover plate 5, an insulating cover layer 6 and a skirt 7, the top cover plate 2 is disposed on the top of the ceramic pipe 1, the bottom cover plate 5 is disposed on the bottom of the ceramic pipe 1, the fixing device 4 penetrates through the top cover plate 2 and the bottom cover plate 5 and is fixedly disposed, the insulating cover layer 6 is disposed on the outer side of the ceramic pipe 1, the skirt 7 is disposed on the outer side of the insulating cover layer 6, and the top cover plate 2 is provided with a back flushing nozzle 8. The ceramic tube body 1 is internally provided with a hollow cylindrical structure, and the hollow hole in the ceramic tube body 1 and the recoil spray hole 8 are arranged on the same straight line.

Fixing device 4 sets up to insulating screw rod, all is provided with the screw of the same quantity and size on lamina tecti border 2.2 and the lamina tecti ways 5.1, and insulating screw rod passes the screw and sets up 3 tightening settings of nut. The top cover plate sleeve cover 2.1 is sleeved at the top of the ceramic tube body 1, the bottom cover plate sleeve cover 5.1 is sleeved at the bottom of the ceramic tube body 1, the edge 2.2 of the top cover plate and the bottom cover plate sleeve cover 5.1 are arranged to be of a circular structure, and the inner diameter of the top cover plate is the same as the outer diameter of the ceramic tube body 1. The insulating covering layer 6 is arranged as an epoxy resin layer, covers the insulating screw rod, the nut 3, the top cover plate edge 2.2 and the bottom cover plate sleeve cover 5.1 and comprises the ceramic pipe body 1. The top sleeve cover plate 2 and the bottom sleeve cover plate 5 are steel plates or zinc alloy plates.

The method comprises the following steps of firstly, respectively and tightly adhering round steel plates with grooves to the upper and lower ends of a recoil pipe by using epoxy resin, wherein the center of the steel plate at the upper end of the recoil pipe is provided with an opening, and the size of the opening is consistent with the aperture size of the recoil pipe. 4 round holes capable of installing insulating bolts are further formed in the steel plate and are evenly distributed on the periphery of the steel plate. 8 nuts are respectively used at the upper end and the lower end of the 4 insulating screw rods to play a role in fixing the position of the recoil pipe. In order to avoid lightning stroke, the distance between the steel plates is too close to generate flashover, and the insulating screw, the ceramic tube and the nut are fully encapsulated by epoxy resin. The umbrella skirt is positioned at the outermost edge of the encapsulated epoxy resin cylinder.

As shown in fig. 4, the top sheathing board 2 includes a top sheathing board 2.1 and a top sheathing board rim 2.2, the top sheathing board 2.1 is provided in an upwardly concave configuration, and the top sheathing board rim 2.2 is provided on a bottom side of the top sheathing board 2.1. The top cover plate 2 is mainly used for fixing the upper end of the ceramic pipe body 1, then the top of the top cover plate cover 2.1 can be directly used as an arc striking electrode when being exposed, the fixation and the action of the arc striking electrode are realized, the double action is realized, meanwhile, the practical service life of the arc striking electrode can be very good, the arc fixing device has the fixation property, the thickness is thick enough, and after the arc is burnt for multiple times, the arc can normally work after being worn.

As shown in fig. 5, the bottom cover plate 5 includes a bottom cover plate cover 5.1 and a bottom cover plate rim 5.2, the bottom cover plate cover 5.1 is configured as a downward concave structure, and the bottom cover plate rim 5.2 is configured on the top side edge of the bottom cover plate cover 5.1. Bottom cover plate 5 mainly is used for entangling the bottom of fixed ceramic body 1, encases the bottom, the cracked condition can not appear, and simultaneously end cover plate upper shield 5.1 is as connecing the sudden strain of a muscle electrode, passes backward recoil surplus electric energy, solves original difficult fixed, the not long technical problem of life of connecing the sudden strain of a muscle electrode.

As shown in fig. 6, a bottom cover plate sleeve cover 5.1 of the bottom cover plate 5 is provided with a fixed pier 9 at the bottom, an invaginated screw hole is provided at the bottom of the fixed pier 9, and the fixed pier 9 is made of a conductive material and is integrated with the bottom cover plate sleeve cover 5.1. The fixed piers 9 are mainly used for fixing the whole recoil device on an external structure, so that the quick fixation is realized.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.