CN211700926U - Multi-chamber vacuum arrester with series resistor discs - Google Patents
Multi-chamber vacuum arrester with series resistor discs Download PDFInfo
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- CN211700926U CN211700926U CN202020689704.5U CN202020689704U CN211700926U CN 211700926 U CN211700926 U CN 211700926U CN 202020689704 U CN202020689704 U CN 202020689704U CN 211700926 U CN211700926 U CN 211700926U
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Abstract
The utility model relates to a series resistance card multi-chamber vacuum arrester, including the arrester shell, insulating inner core, electrode group and the insulating inner core setting of zinc oxide resistance card are inside the arrester shell, the inside of insulating inner core is equipped with the cylindricality vacuum cavity along its center, electrode group and zinc oxide resistance card all set up in the vacuum cavity, the electrode group includes the upper electrode, lower electrode and middle electrode group, middle electrode group sets up between upper electrode and lower electrode, between upper electrode and its adjacent middle electrode, form the vacuum arc extinguishing space of mutual isolation between lower electrode and its adjacent middle electrode and between two adjacent middle electrodes. Compare in current multi-chamber arrester, the utility model discloses an arrester has the operating characteristic that does not have chopped wave, clearance and does not receive advantages such as environmental factor influence, compares in ordinary zinc oxide arrester, the utility model discloses an arrester has advantages such as through-flow capacity is big, no leakage current.
Description
Technical Field
The utility model relates to a lightning-arrest equipment technical field, concretely relates to series resistance card multi-chamber vacuum arrester.
Background
The lightning arrester is used for protecting various electrical equipment in an electric power system from being damaged by lightning overvoltage, operation overvoltage and power frequency transient overvoltage impact. The types of arresters are mainly protection gap, valve type arresters and zinc oxide arresters. The protective gap lightning arrester is mainly used for limiting atmospheric overvoltage and is generally used for protecting incoming line sections of power distribution systems, lines and substations. The valve type lightning arrester and the zinc oxide lightning arrester are used for protecting a substation and a power plant, are mainly used for limiting atmospheric overvoltage in a system of 500KV and below, and are also used for limiting internal overvoltage or performing backup protection on the internal overvoltage in an ultrahigh voltage system.
The existing multi-chamber lightning arrester has the following defects: 1. the chopper easily threatens the safety of the winding equipment. 2. The operating characteristics of the gap are greatly affected by environmental factors such as air humidity and air pressure. 3. Two phases operating simultaneously will produce an interphase short circuit. The existing zinc oxide lightning arrester has the following defects: 1. the through-flow capacity is small. 2. The zinc oxide resistor disc is aged quickly due to leakage current, and the aging vicious circle caused by uneven potential distribution is easily caused by the characteristic parameter difference of the series resistor disc, so that the lightning arrester is damaged finally. 3. The aging aggravation of the zinc oxide resistance card is avoided when the over-voltage of the energy infinite type is deeply inhibited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem not enough, provide a series resistance card multi-chamber vacuum arrester.
The utility model discloses a solve above-mentioned technical problem not enough, the technical scheme who adopts is: a series resistance card multi-chamber vacuum arrester comprises an arrester shell, an insulating inner core, an electrode group and a zinc oxide resistance card, wherein a plurality of insulating umbrella skirts are uniformly sleeved outside the arrester shell from top to bottom, the insulating inner core is arranged inside the arrester shell, a cylindrical vacuum cavity is arranged inside the insulating inner core along the center of the insulating inner core, the electrode group and the zinc oxide resistance card are both arranged in the vacuum cavity, the electrode group comprises an upper electrode, a lower electrode and a middle electrode group, the middle electrode group is arranged between the upper electrode and the lower electrode, the middle electrode group comprises a plurality of middle electrodes which are arranged from top to bottom at intervals, the upper electrode and the lower electrode are both in a conical structure, the upper electrode and the lower electrode are respectively arranged at the upper end and the lower end of the vacuum cavity, and the top electrode and the bottom electrode are arranged oppositely, and mutually isolated vacuum arc extinguishing gaps are formed between the top electrode and the adjacent middle electrode, between the bottom electrode and the adjacent middle electrode and between the two adjacent middle electrodes.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: and the outer wall of the insulating inner core and the inner wall of the lightning arrester shell are provided with threads matched with each other.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: the volumes of the plurality of vacuum arc extinguishing gaps are the same.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: the insulating inner core is made of epoxy resin or rubber.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: the insulating inner core is internally provided with reinforcing ribs which are distributed around the electrode group.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: the middle electrode group comprises a plurality of sub-electrodes, and the upper end face and the lower end face of each sub-electrode are conical faces.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: the zinc oxide resistance card is arranged at the lower end of the vacuum cavity, and the upper end of the zinc oxide resistance card is attached to the plane end of the lower electrode.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: the middle electrode is divided into a mother electrode and a child electrode, the mother electrode is in a conical structure, the upper end face and the lower end face of the child electrode are conical surfaces, and the middle electrode group comprises two mother electrodes and a plurality of child electrodes symmetrically arranged on the upper side and the lower side of the two mother electrodes.
As the utility model relates to a further optimization of series resistance card multi-chamber vacuum arrester: a gap is formed between the two female electrodes, the zinc oxide resistance chip is embedded in the gap between the two female electrodes, and the upper end face and the lower end face of the zinc oxide resistance chip are respectively attached to the two female electrodes.
The utility model discloses a multicavity room vacuum arrester has following beneficial effect:
compare in current multi-chamber arrester, this structure arrester has following 3 big advantages:
1. and no chopping exists, so that the threat to the safety of winding equipment is avoided.
2. The action characteristic of the gap is not influenced by environmental factors such as air humidity and air pressure;
3. the two phases act simultaneously, so that interphase short circuit cannot be generated;
compared with the common zinc oxide lightning arrester:
this structure arrester has following 3 big advantages:
1. the through-flow capacity is large;
2. the resistor has no leakage current, delays the aging of the zinc oxide resistor disc, and avoids the damage caused by aging vicious circle due to the uneven potential distribution caused by the characteristic parameter difference of the series resistor disc.
3. The aging aggravation of the zinc oxide resistance card is avoided when the over-voltage of the energy infinite type is deeply inhibited.
Drawings
Fig. 1 is a schematic view of the external structure of the multi-chamber vacuum arrester of the present invention;
fig. 2 is a schematic view of an external structure of the multi-chamber vacuum arrestor in example 1;
fig. 3 is a schematic view showing an external structure of a multi-chamber vacuum arrestor in example 2;
the labels in the figure are: 1. the lightning arrester comprises a lightning arrester shell, 2, an insulating inner core, 3, a zinc oxide resistance card, 4, a vacuum cavity, 5, an upper electrode, 6, a lower electrode, 7, a middle electrode, 8, a vacuum arc extinguishing gap, 9, a conducting rod, 10, an insulating umbrella skirt, 7-1, a female electrode, 7-2 and a sub-electrode.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1 and 2: a series resistance card multi-chamber vacuum arrester comprises an arrester shell 1, an insulating inner core 2, an electrode group and a zinc oxide resistance card 3, wherein a plurality of insulating umbrella skirts 10 are uniformly sleeved outside the arrester shell 1 from top to bottom, the insulating inner core 2 is arranged inside the arrester shell 1, and the insulating inner core 2 is made of epoxy resin or rubber. The outer wall of the insulating inner core 2 and the inner wall of the arrester shell 1 are provided with mutually matched threads, and the insulating inner core 2 and the arrester shell 1 are screwed together.
The insulating inner core 2 is internally provided with a cylindrical vacuum cavity 4 along the center thereof, an electrode group and a zinc oxide resistance card 3 are arranged in the vacuum cavity 4, the electrode group comprises an upper electrode 5, a lower electrode 6 and a middle electrode group, the middle electrode group is arranged between the upper electrode 5 and the lower electrode 6, the middle electrode group comprises a plurality of middle electrodes 7 which are arranged from top to bottom at intervals, the upper electrode 5 and the lower electrode 6 are in a conical structure, the upper electrode 5 and the lower electrode 6 are respectively arranged at the upper end and the lower end of the vacuum cavity 4, the pointed ends of the upper electrode 5 and the lower electrode 6 are oppositely arranged, mutually isolated vacuum arc extinguishing gaps 8 are formed between the upper electrode 5 and the adjacent middle electrode 7, between the lower electrode 6 and the adjacent middle electrode 7 and between the adjacent two middle electrodes 7, the volume of each vacuum arc extinguishing gap 8 is the same, and the upper end face and the lower end face, the zinc oxide resistance chip 3 is arranged at the lower end of the vacuum cavity 4, and the upper end of the zinc oxide resistance chip 3 is attached to the plane end of the lower electrode 6. The upper end of the upper electrode 5 and the lower end of the zinc oxide resistance chip 3 are respectively connected with a conductive rod 9, and the conductive rod 9 extends out of the insulating inner core 2.
The reinforcing ribs are arranged inside the insulating inner core 2 and distributed around the electrode group, and the reinforcing ribs are used for enhancing the stability and rigidity of the insulating inner core 2 and preventing the conical electrode from inclining inside the lightning arrester.
Example 2
As shown in fig. 1 and 3: a series resistance card multi-chamber vacuum arrester comprises an arrester shell 1, an insulating inner core 2, an electrode group and a zinc oxide resistance card 3, wherein a plurality of insulating umbrella skirts are uniformly sleeved outside the arrester shell 1 from top to bottom, the insulating inner core 2 is arranged inside the arrester shell 1, and the insulating inner core 2 is made of epoxy resin or rubber. The outer wall of the insulating inner core 2 and the inner wall of the arrester shell 1 are provided with mutually matched threads, and the insulating inner core 2 and the arrester shell 1 are screwed together.
The insulating inner core 2 is internally provided with a cylindrical vacuum cavity 4 along the center thereof, an electrode group and a zinc oxide resistor disc 3 are arranged in the vacuum cavity 4, the electrode group comprises an upper electrode 5, a lower electrode 6 and a middle electrode group, the middle electrode group is arranged between the upper electrode 5 and the lower electrode 6, the middle electrode group comprises a plurality of middle electrodes 7 which are arranged from top to bottom at intervals, the upper electrode 5 and the lower electrode 6 are both in a conical structure, the upper electrode 5 and the lower electrode 6 are respectively arranged at the upper end and the lower end of the vacuum cavity 4, the pointed ends of the upper electrode 5 and the lower electrode 6 are oppositely arranged, mutually isolated vacuum arc extinguishing gaps 8 are formed between the upper electrode 5 and the adjacent middle electrode 7, between the lower electrode 6 and the adjacent middle electrode 7 and between the adjacent two middle electrodes 7, and the volume of each vacuum arc extinguishing gap 8 is the,
the middle electrode 7 is divided into a mother electrode 7-1 and a sub-electrode 7-2, the mother electrode 7-1 is in a conical structure, the upper end face and the lower end face of the sub-electrode 7-2 are conical surfaces, and the middle electrode group comprises two mother electrodes 7-1 and a plurality of sub-electrodes 7-2 which are symmetrically arranged on the upper side and the lower side of the two mother electrodes 7-1. A gap is arranged between the two mother electrodes, the zinc oxide resistance chip 3 is embedded in the gap between the two mother electrodes 7-1, and the upper end face and the lower end face of the zinc oxide resistance chip 3 are respectively attached to the two mother electrodes 7-1. The upper end of the upper electrode 5 and the lower end of the lower electrode 6 are respectively connected with a conducting rod 9, and the conducting rod 9 extends out of the insulating inner core 2.
The utility model discloses vacuum arrester's theory of operation does: when the tower pole or the lightning conductor is struck by lightning, the high voltage caused by lightning current enables the series gap to be punctured and discharged, the potential difference between the cross arm and the conductor is reduced, and the insulator is guaranteed not to flashover any more, so that the power failure caused by tripping of the circuit is avoided, after the series gap acts, the residual voltage of the zinc oxide resistor is limited to be far lower than the flashover voltage of the insulator, and under the power frequency voltage of a system after the lightning voltage passes, due to the current limiting effect of the resistor and the extremely strong arc extinguishing capability of the vacuum gap, the power frequency follow current can be extinguished at the first zero crossing point after the lightning current passes, and the normal power supply is guaranteed.
Because the arc extinguishing space is vacuum, make easier arc extinguishing on the one hand, on the other hand can let the zinc oxide resistance card be difficult to wet, prolongs the life of zinc oxide resistance card, and ordinary arrester zinc oxide resistance card because sealed not enough, easily wets, arouses leakage current, causes ageing, shortens life. Also, when the lightning arrester is operated (when lightning discharge occurs), a very high temperature is not generated. If the gas is heated, the expansion is exploded, but the vacuum gap is not expanded, and even if the temperature is increased, the expansion is not generated, and the internal pressure is not changed.
The utility model discloses an arrester includes the vacuum arc extinguishing clearance of a plurality of series connection for electric arc energy dispersion, a clearance can bear the energy too big, and the many clearances is with the energy split, and the energy is low, and the temperature rise is also low, and the arc extinguishing is realized more easily.
The utility model discloses an electrode of arrester has the toper face, and the conical electrode is metal material, under the thunder and lightning effect, gathers at most advanced production electric charge, produces strong electric field, under strong electric field's effect, arouses very easily and discharges, has inhomogeneous electric field between the conical electrode, and dull and stereotyped electrode is difficult to discharge, and conical electrode is most advanced easily to discharge. A conductive path is formed between the conical electrodes, so that the arc starting is more stable, the divergence is small, the electric field of the flat electrode is uniform, the arc starting voltage is unstable, the divergence is large, and the discharge can be realized between the conical electrodes at about 100 v. The unique electrode structure has a conical gap, so that the arcing is more stable, the gap is connected with the zinc oxide resistance sheet (valve sheet) in series, no current passes through the gap (leakage current cannot be generated) at ordinary times, the valve sheet is protected, and the service life of the valve sheet is prolonged.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (9)
1. The utility model provides a series resistance card multi-chamber vacuum arrester which characterized in that: the lightning arrester comprises a lightning arrester shell (1), an insulating inner core (2), an electrode group and a zinc oxide resistance card (3), wherein a plurality of insulating umbrella skirts (10) are uniformly sleeved outside the lightning arrester shell (1) from top to bottom, the insulating inner core (2) is arranged inside the lightning arrester shell (1), a cylindrical vacuum cavity (4) is arranged inside the insulating inner core (2) along the center of the insulating inner core, the electrode group and the zinc oxide resistance card (3) are arranged in the vacuum cavity (4), the electrode group comprises an upper electrode (5), a lower electrode (6) and a middle electrode group, the middle electrode group is arranged between the upper electrode (5) and the lower electrode (6), the middle electrode group comprises a plurality of middle electrodes (7) which are arranged at intervals from top to bottom, the upper electrode (5) and the lower electrode (6) are of a conical structure, and the upper electrode (5) and the lower electrode (6) are respectively arranged at the upper end and, and the pointed ends of the upper electrode (5) and the lower electrode (6) are oppositely arranged, and vacuum arc extinguishing gaps (8) which are mutually isolated are formed between the upper electrode (5) and the adjacent middle electrode (7), between the lower electrode (6) and the adjacent middle electrode (7) and between the two adjacent middle electrodes (7).
2. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 1, wherein: and the outer wall of the insulating inner core (2) and the inner wall of the arrester shell (1) are provided with threads matched with each other.
3. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 1, wherein: the volumes of the vacuum arc extinguishing gaps (8) are the same.
4. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 1, wherein: the insulating inner core (2) is made of epoxy resin or rubber.
5. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 1, wherein: the insulating inner core (2) is internally provided with reinforcing ribs which are distributed around the electrode group.
6. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 1, wherein: the upper end surface and the lower end surface of the middle electrode (7) are conical surfaces.
7. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 6, wherein: the zinc oxide resistance card (3) is arranged at the lower end of the vacuum cavity (4), and the upper end of the zinc oxide resistance card (3) is attached to the plane end of the lower electrode (6).
8. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 1, wherein: the middle electrode (7) is divided into a mother electrode (7-1) and a sub-electrode (7-2), the mother electrode (7-1) is in a conical structure, the upper end face and the lower end face of the sub-electrode (7-2) are conical surfaces, and the middle electrode group comprises two mother electrodes (7-1) and a plurality of sub-electrodes (7-2) symmetrically arranged on the upper side and the lower side of the two mother electrodes (7-1).
9. A series resistor disc multi-chamber vacuum arrestor as set forth in claim 8, wherein: a gap is arranged between the two mother electrodes, the zinc oxide resistance chip (3) is embedded in the gap between the two mother electrodes (7-1), and the upper end face and the lower end face of the zinc oxide resistance chip (3) are respectively attached to the two mother electrodes (7-1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020689704.5U CN211700926U (en) | 2020-04-29 | 2020-04-29 | Multi-chamber vacuum arrester with series resistor discs |
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| CN202020689704.5U CN211700926U (en) | 2020-04-29 | 2020-04-29 | Multi-chamber vacuum arrester with series resistor discs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431034A (en) * | 2020-04-29 | 2020-07-17 | 河南四达电力设备股份有限公司 | Multi-chamber vacuum arrester with series resistor discs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431034A (en) * | 2020-04-29 | 2020-07-17 | 河南四达电力设备股份有限公司 | Multi-chamber vacuum arrester with series resistor discs |
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Effective date of registration: 20220606 Address after: 510000 room A207, room 404, No. 1, Mingzhu 1st Street, Hengli Town, Nansha District, Guangzhou City, Guangdong Province (office only) Patentee after: China Southern Power Grid General Aviation Service Co.,Ltd. Address before: 461500 middle section of Xingshan Road, Changge, Xuchang, Henan province (electrical porcelain Industrial Park) Patentee before: FOUR OF HENAN ELECTRIC POWER EQUIPMENT Co.,Ltd. |
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