CN112909741A - Multi-chamber lightning arrester suitable for high-resistance mountainous area and production process thereof - Google Patents
Multi-chamber lightning arrester suitable for high-resistance mountainous area and production process thereof Download PDFInfo
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- CN112909741A CN112909741A CN202110087918.4A CN202110087918A CN112909741A CN 112909741 A CN112909741 A CN 112909741A CN 202110087918 A CN202110087918 A CN 202110087918A CN 112909741 A CN112909741 A CN 112909741A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
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Abstract
The invention relates to a multi-chamber lightning arrester suitable for high-resistance mountainous areas and a production process thereof, and the multi-chamber lightning arrester comprises a multi-chamber gap lightning arrester and a gap insulator which are integrally connected, wherein the multi-chamber gap lightning arrester comprises an insulating rod, a plurality of bead-shaped metal electrodes, a first metal end and a silicon rubber skirt sleeve, the bead-shaped metal electrodes are linearly arranged and installed along the length direction of the insulating rod, and a through hole is arranged between every two bead-shaped metal electrodes; the gap insulator comprises an epoxy rod, a gap insulator body, a high-voltage end electrode, an arc striking rod, a discharging screw rod and a second metal end, wherein the gap insulator body is sleeved on the epoxy rod, the high-voltage end electrode and the discharging screw rod are respectively arranged at two ends of the epoxy rod, the high-voltage end electrode is connected with the arc striking rod, and the arc striking rod and the discharging screw rod are respectively connected with a first discharging ball and a second discharging ball. The invention adopts a pure air gap structure to be isolated from the power grid, reduces the power-off or reclosing operation of a power supply system, enhances the reliability, prolongs the service life and reduces the maintenance cost.
Description
Technical Field
The invention relates to the technical field of lightning arresters, in particular to a multi-chamber lightning arrester suitable for high-resistance mountainous areas and a production process thereof.
Background
10kV distribution lines that make somebody a mere figurehead distributes that the line distributes widely, and the circuit is long, and the topography of locating is complicated, and 10kV distribution lines's insulation level is low, and the thunder and lightning overvoltage can make the insulator take place the flashover, forms power frequency afterflow on thunderbolt flashover passageway and blows the wire. The main reason for causing the broken wire is to build an arc on the lightning stroke flashover channel to form power frequency follow current, the temperature of the arc root is very high, the wire can be blown in a short time, even if the bare wire is, if the passing current is very large, the wire can also be blown.
The arc striking angle (puncture wire clamp) mode adopted in the field of lightning protection of distribution network lines at present can effectively protect line wires and line insulators. However, in this method, arc is naturally extinguished at the zero crossing point of the arc current, the arc extinguishing capability is poor, the arc extinguishing time is long, and re-ignition is possible, so that the trip rate of the line cannot be reduced, and the automatic reclosing device needs to be matched with the automatic reclosing device. The traditional mode of the zinc oxide arrester and the series gap arrester (overvoltage protector) can effectively protect the insulator from being damaged by electric arcs and reduce the lightning trip-out rate of a line, but has the defects of high-voltage electricity aging of a zinc oxide resistor disc, sealing failure of the resistor disc, dampness, complex series gap manufacturing process and the like, and the device is difficult to install due to large weight and size, high in operation and maintenance cost and limited to be popularized and applied in a distribution network on a large scale.
Disclosure of Invention
The present invention aims to solve the above technical problems and disadvantages, and provides a multi-chamber lightning arrester suitable for high-resistance mountainous areas and a production process thereof.
In order to solve the technical problems, the invention adopts the technical scheme that: a multi-chamber arrester suitable for high-resistance mountainous areas comprises a multi-chamber gap arrester and a gap insulator which are integrally connected, wherein the multi-chamber gap arrester and the gap insulator are coaxially butted together; the multi-chamber gap lightning arrester comprises an insulating rod, a plurality of bead-shaped metal electrodes, a first metal end and a silicon rubber skirt sleeve, wherein the bead-shaped metal electrodes are linearly arranged along the length direction of the insulating rod, a penetrating hole is formed between every two bead-shaped metal electrodes, and the silicon rubber skirt sleeve is sleeved on the outer sides of the insulating rod and the bead-shaped metal electrodes; the first metal end is arranged at one end far away from the gap insulator; the gap insulator comprises an epoxy rod, a gap insulator body, a high-voltage end electrode, an arc striking rod, a discharge screw rod and a second metal end, the gap insulator body is sleeved on the epoxy rod, the high-voltage end electrode and the discharge screw rod are respectively arranged at two ends of the epoxy rod, the high-voltage end electrode is connected with the arc striking rod, the discharge screw rod is fixed at the end of the epoxy rod through a connecting pipe, the arc striking rod and the discharge screw rod are respectively connected with a first discharge ball and a second discharge ball, an air gap is formed between the first discharge ball and the second discharge ball, and the second metal end is arranged at one end far away from the multi-chamber gap arrester; the insulating rod of the multi-chamber gap lightning arrester is in conductive connection with the connecting pipe of the gap insulator through the conductive piece.
The multi-chamber lightning arrester suitable for the high-resistance mountainous area is further optimized as follows: the centers of gravity of the first discharge ball and the second discharge ball are positioned on different planes.
The multi-chamber lightning arrester suitable for the high-resistance mountainous area is further optimized as follows: and the distance between the second discharge ball of the discharge screw and the first discharge ball of the arc striking rod is 30-50 mm.
The multi-chamber lightning arrester suitable for the high-resistance mountainous area is further optimized as follows: the insulating rod is an organic silicon insulating rod cured by peroxide.
The multi-chamber lightning arrester suitable for the high-resistance mountainous area is further optimized as follows: and the high-voltage end electrode and the connecting pipe are both provided with damp-proof rings.
The multi-chamber lightning arrester suitable for the high-resistance mountainous area is further optimized as follows: the silicon rubber skirt sleeve and the gap insulator body are of an integrally formed structure.
The production process of the multi-chamber lightning arrester suitable for the high-resistance mountainous area comprises the following steps:
firstly, a plurality of bead-type metal electrodes are linearly arranged on an insulating rod along the length direction of the insulating rod, and a penetrating hole is reserved between every two bead-type metal electrodes to obtain a core body of the multi-cavity gap lightning arrester for later use;
secondly, respectively buckling and pressing two ends of an epoxy rod of the gap insulator with a high-voltage end electrode and a connecting pipe to form a whole, independently manufacturing and molding the whole in a vulcanizing machine mold, then buckling and pressing an arc striking rod in a crimping hole on the high-voltage end electrode, and then screwing a discharging screw on the connecting pipe to enable a second discharging ball of the discharging screw and a first discharging ball of the arc striking rod to be within a distance of 30-50 mm to form a fixed air gap; obtaining a gap insulator semi-finished product for later use;
thirdly, butting the core body of the multi-chamber gap lightning arrester with the semi-finished product of the gap insulator, so that one end of the multi-chamber gap lightning arrester is in conductive connection with one end of the gap insulator installation connecting pipe through a conductive piece, a first metal end is installed at the other end of the multi-chamber gap lightning arrester, and a second metal end is installed at the other end of the gap insulator, so that the core body of the lightning arrester is obtained for later use;
coating a coupling agent on the surface of the lightning arrester core body, preheating, and performing one-time compression molding on the mixed silicon rubber outside the lightning arrester core body to obtain a semi-finished product of the lightning arrester;
and fifthly, transferring the semi-finished product of the lightning arrester into the drying oven again for vulcanization, and respectively installing binding posts on the first metal end and the second metal end after vulcanization, namely completing the preparation of the multi-chamber lightning arrester suitable for the high-resistance mountainous area.
The invention has the following beneficial effects:
the multi-chamber lightning arrester suitable for the high-resistance mountainous area adopts a pure air gap structure to be isolated from a power grid, does not bear system voltage and system operation overvoltage, enables the power grid to stably operate, reduces power-off or reclosing operations of a power supply system, enhances reliability, prolongs service life and reduces maintenance cost.
The lightning arrester has a good lightning impulse volt-second curve, and has the characteristics of stable and reliable discharge; the lightning arrester is not limited by the voltage gradient of the pressure sensitive resistance card, and the installation and use environmental conditions of the lightning arrester are greatly reduced in size, weight and installation height.
The insulating rod of the arrester adopts peroxide cured organic silicon, has excellent tracking performance, mechanical property, hydrophobicity and flame retardant property, does not contain a metal oxide pressure sensitive element, and avoids the problems of high-voltage electrical aging and overheating damage.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
reference numerals:
1. the lightning arrester comprises a multi-cavity gap lightning arrester body, an insulating rod, a bead-type metal electrode, a first metal end 104, a silicon rubber skirt, a second metal end 105, a penetrating hole, a second metal end 2, a gap insulator 201, an epoxy rod 202, a gap insulator body 203, a high-voltage end electrode 204, an arc striking rod 205, a discharge screw rod 206, a second metal end 207, a first discharge ball 208, a second discharge ball 209, a connecting pipe 210, an air gap 3 and a conducting piece.
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. 1-2, a multi-chamber arrester suitable for high-resistance mountainous areas comprises a multi-chamber gap arrester 1 and a gap insulator 2 which are integrally connected, wherein the multi-chamber gap arrester 1 and the gap insulator 2 are coaxially butted together; the multi-chamber gap lightning arrester 1 comprises an insulating rod 101, a plurality of bead-shaped metal electrodes 102, a first metal end 103 and a silicone rubber skirt sleeve 104, wherein the bead-shaped metal electrodes 102 are arranged in a linear manner along the length direction of the insulating rod 101, a penetrating hole 105 is formed between every two bead-shaped metal electrodes 102, and the silicone rubber skirt sleeve 104 is sleeved on the outer sides of the insulating rod 101 and the bead-shaped metal electrodes 102; the first metal end 103 is arranged at one end far away from the gap insulator 2; the gap insulator 2 comprises an epoxy rod 201, a gap insulator body 202, a high-voltage end electrode 203, an arc striking rod 204, a discharge screw 205 and a second metal end 206, wherein the gap insulator body 202 is sleeved on the epoxy rod 201, the high-voltage end electrode 203 and the discharge screw 205 are respectively arranged at two ends of the epoxy rod 201, the high-voltage end electrode 203 is connected with the arc striking rod 204, the discharge screw 205 is fixed at the end of the epoxy rod 201 through a connecting pipe 209, the arc striking rod 204 and the discharge screw 205 are respectively connected with a first discharge ball 207 and a second discharge ball 208, an air gap 210 is formed between the first discharge ball 207 and the second discharge ball 208, and the second metal end 206 is arranged at one end far away from the multi-chamber gap arrester 1; the insulating rod 101 of the multi-chamber gap arrester 1 is electrically connected to the connecting pipe 209 of the gap insulator 2 via the conductive member 3.
The centers of gravity of the first discharge ball 207 and the second discharge ball 208 are located on different planes.
The distance between the second discharge ball 208 of the discharge screw 205 and the first discharge ball 207 of the arc ignition rod 204 is 30-50 mm.
The insulating rod 101 is a peroxide cured silicone insulating rod.
And the high-voltage end electrode 203 and the connecting pipe 209 are both provided with damp-proof rings.
The silicone rubber skirt 104 and the gap insulator body 202 are integrally formed.
The production process of the multi-chamber lightning arrester suitable for the high-resistance mountainous area comprises the following steps:
firstly, a plurality of bead-type metal electrodes are linearly arranged on an insulating rod along the length direction of the insulating rod, and a penetrating hole is reserved between every two bead-type metal electrodes to obtain a core body of the multi-cavity gap lightning arrester for later use;
secondly, respectively buckling and pressing two ends of an epoxy rod of the gap insulator with a high-voltage end electrode and a connecting pipe to form a whole, independently manufacturing and molding the whole in a vulcanizing machine mold, then buckling and pressing an arc striking rod in a crimping hole on the high-voltage end electrode, and then screwing a discharging screw on the connecting pipe to enable a second discharging ball of the discharging screw and a first discharging ball of the arc striking rod to be within a distance of 30-50 mm to form a fixed air gap; obtaining a gap insulator semi-finished product for later use;
thirdly, butting the core body of the multi-chamber gap lightning arrester with the semi-finished product of the gap insulator, so that one end of the multi-chamber gap lightning arrester is in conductive connection with one end of the gap insulator installation connecting pipe through a conductive piece, a first metal end is installed at the other end of the multi-chamber gap lightning arrester, and a second metal end is installed at the other end of the gap insulator, so that the core body of the lightning arrester is obtained for later use;
coating a coupling agent on the surface of the lightning arrester core body, preheating, and performing one-time compression molding on the mixed silicon rubber outside the lightning arrester core body to obtain a semi-finished product of the lightning arrester;
and fifthly, transferring the semi-finished product of the lightning arrester into the drying oven again for vulcanization, and respectively installing binding posts on the first metal end and the second metal end after vulcanization, namely completing the preparation of the multi-chamber lightning arrester suitable for the high-resistance mountainous area.
The lightning protection principle of the lightning arrester of the invention is as follows: the multi-chamber lightning arrester receives indirect overvoltage, firstly, an air gap between a high-voltage electrode and a discharge screw rod is broken down, and then, a discharge phenomenon is spread to the interior of a 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 lightning arrester system converts large electric arcs generated by high-power lightning overvoltage into a large number of small electric arcs, and the small electric arcs are discharged by the small arc extinguish chambers between two adjacent electrodes. The hole, i.e. the arc chute, is penetrated during the arc discharge and the high-pressure gas generated blows the arc into the surrounding air, thus extinguishing the arc. The maximum arc extinguishing time does not exceed 20 milliseconds. The power grid can stably run, and the power supply system power failure or reclosing operation can be reduced.
The main technical parameters of the lightning arrester are as follows:
a. rated voltage: 15 kV;
b. rated frequency: 50 Hz;
c. bulk inrush current residual voltage effective value (lightning wave): less than or equal to 50 kV;
d. rated bending load: 1 kN;
e. peak high current surge current (4/10 μ s): less than or equal to 65 kA;
f. nominal discharge current peak (8/20 μ s): 5 kA;
g. creepage ratio distance: 3.1 kV/cm;
h. power frequency wet withstand voltage: not less than 30 kV;
i. lightning impulse 50% discharge voltage peak: less than or equal to 85 kV;
j. lightning impulse action voltage requirement (air gap 50mm +/-5 mm):
firstly, the lightning flashover protector does not act under the impact voltage of 50kV and below.
And secondly, the lightning flashover protector effectively acts at the impulse voltage of 80kV or above.
The installation method of the lightning arrester comprises the following steps: each base of electric pole is provided with one product, special grounding is not needed, and the electric poles are installed in a phase-changing and staggered mode.
The multi-chamber lightning arrester suitable for the high-resistance mountainous area adopts a pure air gap structure to be isolated from a power grid, does not bear system voltage and system operation overvoltage, enables the power grid to stably run, reduces power-off or reclosing operations of a power supply system, enhances reliability, prolongs service life and reduces maintenance cost; the lightning arrester has a good lightning impulse volt-second curve, and has the characteristics of stable and reliable discharge; the lightning arrester is not limited by the voltage gradient of the pressure sensitive resistance card, and the installation and use environmental conditions of the lightning arrester are greatly reduced in size, weight and installation height. The insulating rod of the arrester adopts peroxide cured organic silicon, has excellent tracking performance, mechanical property, hydrophobicity and flame retardant property, does not contain a metal oxide pressure sensitive element, and avoids the problems of high-voltage electrical aging and overheating damage.
The foregoing description of specific embodiments of the present 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 one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (7)
1. The utility model provides a multi-chamber arrester suitable for high resistance mountain area which characterized in that: the lightning arrester comprises a multi-chamber gap lightning arrester body (1) and a gap insulator (2) which are integrally connected, and the multi-chamber gap lightning arrester body (1) and the gap insulator (2) are coaxially butted together;
the multi-chamber gap lightning arrester (1) comprises an insulating rod (101), a plurality of bead-shaped metal electrodes (102), a first metal end (103) and a silicone rubber skirt sleeve (104), wherein the bead-shaped metal electrodes (102) are linearly arranged along the length direction of the insulating rod (101), a penetrating hole (105) is formed between every two bead-shaped metal electrodes (102), and the silicone rubber skirt sleeve (104) is sleeved on the outer sides of the insulating rod (101) and the bead-shaped metal electrodes (102); the first metal end (103) is arranged at one end far away from the gap insulator (2); the gap insulator (2) comprises an epoxy rod (201), a gap insulator body (202), a high-voltage terminal electrode (203), an arc striking rod (204), a discharge screw (205) and a second metal end (206), the gap insulator body (202) is sleeved on an epoxy rod (201), a high-voltage end electrode (203) and a discharge screw rod (205) are respectively arranged at two ends of the epoxy rod (201), the high-voltage end electrode (203) is connected with an arc striking rod (204), the discharge screw rod (205) is fixed at the end of the epoxy rod (201) through a connecting pipe (209), the arc striking rod (204) and the discharge screw rod (205) are respectively connected with a first discharge ball (207) and a second discharge ball (208), an air gap (210) is formed between the first discharge ball (207) and the second discharge ball (208), and a second metal end (206) is arranged at one end far away from the multi-chamber gap lightning arrester (1);
the insulating rod (101) of the multi-chamber gap lightning arrester (1) is in conductive connection with the connecting pipe (209) of the gap insulator (2) through the conductive piece (3).
2. A multi-chamber arrester as claimed in claim 1, which is adapted for use in high-impedance mountainous areas, wherein: the centers of gravity of the first discharge ball (207) and the second discharge ball (208) are positioned on different planes.
3. A multi-chamber arrester as claimed in claim 1 or 2, which is adapted for use in high-impedance mountainous areas, wherein: the distance between the second discharge ball (208) of the discharge screw (205) and the first discharge ball (207) of the arc striking rod (204) is 30-50 mm.
4. A multi-chamber arrester as claimed in claim 1, which is adapted for use in high-impedance mountainous areas, wherein: the insulating rod (101) is a peroxide cured organic silicon insulating rod.
5. A multi-chamber arrester as claimed in claim 1, which is adapted for use in high-impedance mountainous areas, wherein: and the high-voltage end electrode (203) and the connecting pipe (209) are both provided with a damp-proof ring.
6. A multi-chamber arrester as claimed in claim 1, which is adapted for use in high-impedance mountainous areas, wherein: the silicon rubber skirt (104) and the gap insulator body (202) are of an integrally formed structure.
7. A process for producing a multi-chamber arrester suitable for use in high-impedance mountainous areas, according to claim 1, wherein: the method comprises the following steps:
firstly, a plurality of bead-type metal electrodes are linearly arranged on an insulating rod along the length direction of the insulating rod, and a penetrating hole is reserved between every two bead-type metal electrodes to obtain a core body of the multi-cavity gap lightning arrester for later use;
secondly, respectively buckling and pressing two ends of an epoxy rod of the gap insulator with a high-voltage end electrode and a connecting pipe to form a whole, independently manufacturing and molding the whole in a vulcanizing machine mold, then buckling and pressing an arc striking rod in a crimping hole on the high-voltage end electrode, and then screwing a discharging screw on the connecting pipe to enable a second discharging ball of the discharging screw and a first discharging ball of the arc striking rod to be within a distance of 30-50 mm to form a fixed air gap; obtaining a gap insulator semi-finished product for later use;
thirdly, butting the core body of the multi-chamber gap lightning arrester with the semi-finished product of the gap insulator, so that one end of the multi-chamber gap lightning arrester is in conductive connection with one end of the gap insulator installation connecting pipe through a conductive piece, a first metal end is installed at the other end of the multi-chamber gap lightning arrester, and a second metal end is installed at the other end of the gap insulator, so that the core body of the lightning arrester is obtained for later use;
coating a coupling agent on the surface of the lightning arrester core body, preheating, and performing one-time compression molding on the mixed silicon rubber outside the lightning arrester core body to obtain a semi-finished product of the lightning arrester;
and fifthly, transferring the semi-finished product of the lightning arrester into the drying oven again for vulcanization, and respectively installing binding posts on the first metal end and the second metal end after vulcanization, namely completing the preparation of the multi-chamber lightning arrester suitable for the high-resistance mountainous area.
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| CN202110087918.4A CN112909741A (en) | 2021-01-22 | 2021-01-22 | Multi-chamber lightning arrester suitable for high-resistance mountainous area and production process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113782288A (en) * | 2021-09-10 | 2021-12-10 | 福建省电力有限公司泉州电力技能研究院 | Drop-out gap arrester suitable for high-resistance mountainous area and production process thereof |
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| CN111210955A (en) * | 2020-02-28 | 2020-05-29 | 广东电科院能源技术有限责任公司 | Multi-cavity gap lightning arrester |
| CN210779497U (en) * | 2019-12-10 | 2020-06-16 | 江苏赛福电气有限公司 | Multi-cavity arc blowing type lightning protection device |
| CN210778065U (en) * | 2019-12-10 | 2020-06-16 | 江苏赛福电气有限公司 | Multi-cavity arc blowing type lightning protection insulating cross arm |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108023278A (en) * | 2017-12-07 | 2018-05-11 | 武汉水院电气有限责任公司 | A kind of forming method of multi-chamber arrester |
| CN110829183A (en) * | 2019-11-20 | 2020-02-21 | 国网河南省电力公司漯河供电公司 | Lightning arrester for power transmission line |
| CN210779497U (en) * | 2019-12-10 | 2020-06-16 | 江苏赛福电气有限公司 | Multi-cavity arc blowing type lightning protection device |
| CN210778065U (en) * | 2019-12-10 | 2020-06-16 | 江苏赛福电气有限公司 | Multi-cavity arc blowing type lightning protection insulating cross arm |
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| CN113782288A (en) * | 2021-09-10 | 2021-12-10 | 福建省电力有限公司泉州电力技能研究院 | Drop-out gap arrester suitable for high-resistance mountainous area and production process thereof |
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Application publication date: 20210604 |