CN118155965A - Multi-chamber arc blowing type lightning arrester - Google Patents

Abstract

The invention discloses a multi-chamber arc-blowing type arrester, which relates to the field of power system protection equipment and comprises a grounding assembly, wherein a supporting insulator and an arrester assembly are fixedly arranged on the grounding assembly, the top of the supporting insulator is connected with an electrode plate and a wire clamp, the top of the arrester assembly is connected with an electrode sleeve, a discharge gap is formed between the electrode plate and the electrode sleeve, the arrester assembly comprises an arrester body, the bottom of the arrester body is fixedly connected with the grounding assembly, the top of the arrester body is provided with the electrode sleeve, an arc extinguishing cavity is arranged in the arrester body, a plurality of intermediate electrodes are arranged in the arc extinguishing cavity, the arc extinguishing cavity is divided into a plurality of arc extinguishing chambers by the plurality of intermediate electrodes, an arc blowing unit is arranged in the arc extinguishing chamber, a plurality of arc blowing ports are arranged on the surface of the arrester body, which is far away from the supporting insulator, and are communicated with the arc extinguishing chambers; the multi-chamber arc blowing type lightning arrester can rapidly extinguish arc when suffering lightning stroke or other overvoltage through a plurality of arc extinguishing chambers and arc blowing units which are specially designed, so that a power system is effectively protected.

Description

Multi-chamber arc blowing type lightning arrester

Technical Field

The invention relates to the field of power system protection equipment, in particular to a multi-cavity arc blowing type lightning arrester.

Background

In electrical power systems, lightning arresters are critical devices that prevent lightning and other transient overvoltages from damaging the device. Conventional arresters typically employ a single arc chute, the arc extinguishing efficiency and response time of which are limited by the design and materials of the arc chute. Under extreme voltage conditions, these arresters may not provide sufficiently fast protection, resulting in equipment damage or system failure. Therefore, developing a new lightning arrester to improve arc extinguishing efficiency and overall safety of the system has become an important requirement in the field of power system protection.

Disclosure of Invention

The invention aims to provide a multi-chamber arc-blowing type lightning arrester, which can rapidly extinguish arc when suffering lightning stroke or other overvoltage through a plurality of arc extinguishing chambers and arc blowing units which are specially designed, so that a power system is more effectively protected.

The above-mentioned optimization structure of the invention is realized through the following technical scheme: the utility model provides a multichamber arc blowing formula arrester, includes the grounding subassembly, the last support insulator that has set firmly of grounding subassembly, lightning-arrest subassembly, the support insulator top is connected with electrode plate, fastener, the lightning-arrest subassembly top is connected with the electrode holder, the electrode plate with form the discharge gap between the electrode holder, the lightning-arrest subassembly includes the lightning-arrest body, lightning-arrest body bottom with grounding subassembly fixed connection, lightning-arrest body top is equipped with the electrode holder, be equipped with the explosion chamber in the lightning-arrest body, the explosion intracavity is equipped with a plurality of intermediate electrodes, a plurality of intermediate electrode will the explosion chamber separates into a plurality of explosion chambers, be equipped with the arc blowing unit in the explosion chamber, the lightning-arrest body is kept away from support insulator one side surface is equipped with a plurality of arc blowing mouths, the arc blowing mouths with explosion chamber intercommunication.

In some embodiments, the arc blowing unit comprises an arc blowing groove arranged at the bottom of the arc extinguishing chamber, the arc blowing groove is communicated with the arc extinguishing chamber through an arc blowing opening, an arc blowing component is arranged in the arc extinguishing chamber and can slide in the arc extinguishing chamber, and two ends of the arc blowing component are symmetrically provided with the middle electrode.

In some embodiments, the arc-blowing slot is a conical hole, the arc-extinguishing chamber is a cylindrical hole, the arc-blowing opening is a bell mouth, and the radius of the arc-blowing slot away from one end of the arc-extinguishing chamber is greater than the radius of the arc-extinguishing chamber, and the radius of the arc-blowing opening away from one end of the arc-extinguishing chamber is greater than the radius of the arc-extinguishing chamber.

In some embodiments, at least one chute is provided on the side wall of the arc extinguishing chamber, and at least one slide bar is provided on the arc blowing assembly, and the slide bar can slide in the chute.

In some embodiments, a rebound member is connected between the arc blowing groove and the arc blowing assembly, so as to drive the arc blowing assembly to reset.

In some embodiments, the arc blowing component comprises a soft iron core, a metal coil is wound on the soft iron core, two ends of the metal coil are respectively provided with a drainage ball, and a gap is reserved between the two drainage balls and the middle electrodes at two ends of the arc blowing component.

In some embodiments, at least three sheds are arranged on the lightning protection body, and at least one arc blowing port is arranged between two adjacent sheds.

In some embodiments, the soft iron cell is a hollow cylinder.

In some embodiments, the electrode plate is L-shaped, one end of the electrode plate is connected to the top of the supporting insulator, and the other end of the electrode plate is provided with an arc facing the electrode sleeve.

In some embodiments, an electrical terminal is arranged at the top of the arc extinguishing chamber, the electrode sleeve is sleeved on the electrical terminal, a grounding terminal is arranged at the bottom of the arc extinguishing chamber, and the grounding terminal is connected with the grounding assembly.

The above-mentioned one or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages: the arc-extinguishing chamber is provided with the arc-blowing unit, so that the arc-extinguishing chamber can rapidly extinguish the arc when suffering from lightning stroke or other overvoltage, the arc-extinguishing efficiency is improved, and the power system is more effectively protected; meanwhile, the lightning stroke or overvoltage event can be responded in extremely short time, and the reaction speed is high; and a rebound piece is arranged between the arc blowing component and the arc blowing groove, so that the arc blowing component can be quickly reset after the arc is extinguished, and preparation is made for the next lightning stroke.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of the present invention;

Figure 2 is a schematic cross-sectional view of a lightning protection assembly of the present invention;

Fig. 3 is an enlarged view of the invention at a.

In the figure: 1. a grounding assembly; 2. a support insulator; 3. a lightning protection assembly; 31. a lightning protection body; 32. an arc extinguishing chamber; 33. an intermediate electrode; 34. an arc blowing port; 35. umbrella skirt; 36. an electrical terminal; 37. a ground terminal; 38. an arc extinguishing chamber; 4. an electrode plate; 5. a wire clamp; 6. an electrode sleeve; 7. an arc blowing unit; 71. an arc blowing groove; 72. and an arc blowing assembly.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-3, a multi-chamber arc-blowing type lightning arrester comprises a grounding component 1, wherein a supporting insulator 2 and a lightning-protection component 3 are fixedly arranged on the grounding component 1, an electrode plate 4 and a wire clamp 5 are connected to the top of the supporting insulator 2, an electrode sleeve 6 is connected to the top of the lightning-protection component 3, a discharge gap is formed between the electrode plate 4 and the electrode sleeve 6, the lightning-protection component 3 comprises a lightning-protection body 31, the bottom of the lightning-protection body 31 is fixedly connected with the grounding component 1, the top of the lightning-protection body 31 is provided with the electrode sleeve 6, an arc-extinguishing cavity 32 is arranged in the lightning-extinguishing cavity 32, a grounding terminal 36 is arranged at the top of the arc-extinguishing cavity 32, the electrode sleeve 6 is sleeved on the grounding terminal 36, a grounding terminal 37 is arranged at the bottom of the arc-extinguishing cavity 32, the grounding terminal 37 is connected with the grounding component 1, the plurality of middle electrodes 33 are arranged along the length direction of the lightning-protection body 31, the lightning protection device can divide the arc extinguishing cavity 32 into a plurality of arc extinguishing chambers 38 by a plurality of intermediate electrodes 33 flowing through the lightning protection body 31, an arc blowing unit 7 is arranged in the arc extinguishing chambers 38, a plurality of arc blowing ports 34 are arranged on the surface of one side of the lightning protection body 31 far away from the supporting insulator 2, the arc blowing ports 34 are communicated with the arc extinguishing chambers 38, after lightning is impacted, the arc extinguishing chambers 32 between the electric terminals 36 and the grounding terminals 37 form lightning impulse discharge, the power frequency follow current arc is also formed along a lightning impulse discharge channel, the power frequency follow current arc is divided into a plurality of short arcs by the intermediate electrodes 33, the air in the arc extinguishing chambers 38 is rapidly heated by the high temperature generated by the short arcs to form expansion gas, so as to form air pressure difference with the outside, then the air is sprayed out along the arc blowing ports 34, meanwhile, the short arcs are taken out of the arc extinguishing chambers 38 together by the hot air flow, and are directly contacted with the air of the outside, so that the diffusion of plasma and the dissipation of heat in the short arcs are enhanced, the method accelerates the de-ionization process of the short electric arc to achieve the effect of rapidly interrupting the power frequency follow current electric arc of the system, so that the circuit is restored to the normal running state before the protection tripping criterion of the transformer substation breaker is established, and the power frequency running voltage born for a long time is reduced, thereby effectively solving the problem of electric arc reburning caused by multiple lightning strokes, avoiding the root cause of the thermal ionization reburning and eliminating the root cause of the occurrence of lightning stroke tripping and hard short circuit.

The arc blowing unit 7 comprises an arc blowing groove 71 arranged at the bottom of the arc extinguishing chamber 38, the arc extinguishing chamber 38 is communicated between the arc blowing groove 71 and the arc blowing opening 34, an arc blowing component 72 is arranged in the arc extinguishing chamber 38, the arc blowing component 72 can slide in the arc extinguishing chamber 38, the two ends of the arc blowing component 72 are symmetrically provided with intermediate electrodes 33, when current passes through the lightning protection component 3, the intermediate electrodes 33 and the arc blowing unit 7 divide the power frequency follow current arc into a plurality of short arcs, the air in the arc blowing groove 71 and the arc extinguishing chamber 38 is heated by a high Wen Xunsu generated by the short arc between the intermediate electrodes 33 and the arc blowing unit 7 to form expansion gas, then the expansion gas and the outside form air pressure difference, then the expansion gas is sprayed out along the arc blowing opening 34 to form plasma jet, the spraying force of the plasma jet drives the arc blowing component 72 to move towards the direction of the arc blowing opening 34, the length of the short arc between the intermediate electrodes 33 and the arc blowing unit 7 is prolonged, and accordingly the whole arc extinguishing performance is improved, and the arc extinguishing time is shortened.

The arc blowing groove 71 may be a conical hole, the arc extinguishing chamber 38 may be a cylindrical hole, the arc blowing opening 34 may be a horn opening, and the radius of the end of the arc blowing groove 71 away from the arc extinguishing chamber 38 is larger than the radius of the arc extinguishing chamber 38, the radius of the end of the arc blowing opening 34 away from the arc extinguishing chamber 38 is larger than the radius of the arc extinguishing chamber 38, under ideal conditions, the sum of kinetic energy, potential energy and pressure potential energy of a unit volume of fluid is constant at any section of the same flow tube according to the law of conservation of mechanical energy of the fluid, and it is deduced that: when the flow is equal in height, the flow speed is larger, and the pressure is smaller; the pressure in fluid mechanics is the pressure per unit area, namely the pressure in common physics; therefore, when the radii of the two ends of the arc extinguishing chamber 38 are larger than the radius of the arc extinguishing chamber 38, the gas flow speed in the arc extinguishing chamber 38 is larger than the speed of the arc blowing groove 71 flowing to the arc extinguishing chamber 38 and the gas flow speed of the arc blowing port 34, so that the gas flow speed in the arc extinguishing chamber 38 is improved, the arc extinguishing time is shortened, and the arc extinguishing capability is improved.

In some embodiments, at least one chute is provided in the sidewall of the arc chute 38, and at least one slide is provided in the arc blowing assembly 72, the slide being slidable in the chute to improve the stability of the arc blowing assembly 72 when sliding in the arc chute 38.

In some embodiments, a resilient member is connected between the arc blowing slot 71 and the arc blowing assembly 72, and the resilient member may be a spring, and may drive the arc blowing assembly 72 to reset after the arc blowing assembly 72 is blown toward the arc blowing opening 34 to be ready for the next arc extinction.

In some embodiments, the arc blowing assembly 72 includes a soft iron core, which may be a hollow cylinder, which may reduce the weight of the soft iron core, thereby reducing the weight of the arc blowing assembly 72, facilitating movement of the arc blowing assembly 72 under the influence of the inflation gas; the soft iron core is wound with a metal coil, both ends of the metal coil are respectively provided with a drainage ball, gaps are reserved between the two drainage balls and the middle electrodes 33 at both ends of the arc blowing component 72, when the power frequency follow current arc is divided into a plurality of short arcs by the middle electrodes 33 and the arc blowing unit 7, the short arcs flow to the arc blowing component 72, and the soft iron core is wound with the metal coil, so that the short arcs flow through the metal coil to enable the metal coil to generate a magnetic field, thereby driving the upper end and the lower end of the soft iron core to generate magnetic poles, further converting partial electric energy of the short arcs into magnetic energy and heat energy, weakening the intensity of the short arcs, and simultaneously heating the surrounding air by the heat energy generated by the metal coil, shortening the heating time of the air in the arc extinguishing chamber 38, and improving the sensitivity of arc extinguishing work.

In some embodiments, the connection port between the arc blowing port 34 and the arc extinguishing chamber 38 may be provided with a metal ring that can attract the magnet, and may be an iron ring, so that when the arc blowing component 72 is electrified to generate magnetism, the metal ring attracts the arc blowing component 72 mutually, so as to accelerate the moving speed of the arc blowing component 72, thereby improving the injection speed of the plasma jet, and at this time, the middle part of the arc blowing component 72 may be a hollow structure with a net shape.

In some embodiments, at least three umbrella skirts 35 are arranged on the lightning protection body 31, and at least one arc blowing port 34 is arranged between two adjacent umbrella skirts 35, so that the flashover distance on the lightning protection body 31 can be increased; and the resistance capability of surge and flashover discharge is improved, and the protected equipment is protected.

In some embodiments, the electrode plate 4 is L-shaped, one end is connected with the top of the supporting insulator 2, and the other end is provided with an arc facing the electrode sleeve 6, so that the lightning area between the electrode sleeve 6 and the electrode plate 4 can be increased, and the discharge stability between the supporting insulator 2 and the lightning protection component 3 can be improved.

The specific working principle is as follows:

When lightning current passes through the lightning arrester, the arc extinguishing chamber 32 between the electric terminal 36 and the grounding terminal 37 forms lightning impulse discharge, the power frequency follow current arc is also formed along a lightning impulse discharge channel, the middle electrode 33 and the arc blowing component 72 divide the power frequency follow current arc into a plurality of short arcs, the high Wen Xunsu generated by the short arcs heats the arc blowing groove 71 and air in the arc extinguishing chamber 38 to form expansion gas, the arc blowing groove 71 and the arc extinguishing chamber 38 form air pressure difference with the outside, and then the air pressure difference is sprayed out along the arc blowing opening 34, the short arcs are taken out of the arc extinguishing chamber 38 together to directly contact with the air of the outside, meanwhile, the hot air pushes the arc blowing component 72 to move towards the direction of the arc blowing opening 34, the length of the short arcs between the middle electrode 33 and the arc blowing unit 7 is prolonged, the diffusion and heat dissipation of plasma in the short arcs are enhanced, the de-ionization process of the short arcs is accelerated, the effect of the power frequency follow current arc of a rapid system is achieved, and the problem of heavy burning caused by multiple lightning strokes is effectively solved.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a multicavity formula arc arrester that blows, includes grounding subassembly (1), grounding subassembly (1) is last to have set firmly support insulator (2), lightning-arrest subassembly (3), support insulator (2) top is connected with electrode plate (4), fastener (5), lightning-arrest subassembly (3) top is connected with electrode cover (6), electrode plate (4) with form discharge gap between electrode cover (6), its characterized in that: the lightning protection assembly (3) comprises a lightning protection body (31), the bottom of the lightning protection body (31) is fixedly connected with the grounding assembly (1), the top of the lightning protection body (31) is provided with an electrode sleeve (6), an arc extinguishing cavity (32) is arranged in the lightning protection body (31), a plurality of middle electrodes (33) are arranged in the arc extinguishing cavity (32), the middle electrodes (33) divide the arc extinguishing cavity (32) into a plurality of arc extinguishing chambers (38), an arc blowing unit (7) is arranged in the arc extinguishing chambers (38), the lightning protection body (31) is far away from the surface of one side of the supporting insulator (2) is provided with a plurality of arc blowing ports (34), and the arc blowing ports (34) are communicated with the arc extinguishing chambers (38).

2. A multi-chamber arcing arrester as set forth in claim 1, wherein: the arc blowing unit (7) comprises an arc blowing groove (71) arranged at the bottom of the arc extinguishing chamber (38), the arc blowing groove (71) is communicated with the arc extinguishing chamber (38) through an arc blowing opening (34), an arc blowing component (72) is arranged in the arc extinguishing chamber (38), the arc blowing component (72) can slide in the arc extinguishing chamber (38), and two ends of the arc blowing component (72) are symmetrically provided with the middle electrode (33).

3. A multi-chamber arcing arrester as set forth in claim 2, wherein: the arc blowing groove (71) is a conical hole, the arc extinguishing chamber (38) is a cylindrical hole, the arc blowing opening (34) is a horn mouth, the radius of one end of the arc blowing groove (71) away from the arc extinguishing chamber (38) is larger than that of the arc extinguishing chamber (38), and the radius of one end of the arc blowing opening (34) away from the arc extinguishing chamber (38) is larger than that of the arc extinguishing chamber (38).

4. A multi-chamber arcing arrester as set forth in claim 2, wherein: the arc extinguishing chamber (38) is provided with at least one sliding groove on the side wall, the arc blowing component (72) is provided with at least one sliding bar, and the sliding bar can slide in the sliding groove.

5. A multi-chamber arcing arrester as set forth in claim 2, wherein: a rebound piece is connected between the arc blowing groove (71) and the arc blowing component (72) and can drive the arc blowing component (72) to reset.

6. A multi-chamber arcing arrester as set forth in claim 2, wherein: the arc blowing component (72) comprises a soft iron core, a metal coil is wound on the soft iron core, drainage balls are arranged at two ends of the metal coil, and a gap is reserved between the two drainage balls and the middle electrodes (33) at two ends of the arc blowing component (72).

7. A multi-chamber arcing arrester as set forth in claim 1, wherein: at least three umbrella skirts (35) are arranged on the lightning protection body (31), and at least one arc blowing port (34) is arranged between two adjacent umbrella skirts (35).

8. A multi-chamber arcing arrester as set forth in claim 1, wherein: the soft iron cell is a hollow cylinder.

9. A multi-chamber arcing arrester as set forth in claim 1, wherein: the electrode plate (4) is L-shaped, one end of the electrode plate is connected with the top of the supporting insulator (2), and the other end of the electrode plate is provided with an arc facing the electrode sleeve (6).

10. A multi-chamber arcing arrester as set forth in claim 1, wherein: the arc extinguishing chamber (32) top is equipped with electric terminal (36), the cover is equipped with on electric terminal (36) electrode cover (6), arc extinguishing chamber (32) bottom is equipped with ground terminal (37), ground terminal (37) with grounding component (1) are connected.