CN113782288B - Drop-out gap lightning arrester suitable for high-resistance mountain area and production process thereof - Google Patents
Drop-out gap lightning arrester suitable for high-resistance mountain area and production process thereof Download PDFInfo
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- CN113782288B CN113782288B CN202111064101.1A CN202111064101A CN113782288B CN 113782288 B CN113782288 B CN 113782288B CN 202111064101 A CN202111064101 A CN 202111064101A CN 113782288 B CN113782288 B CN 113782288B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention relates to a drop-out gap arrester suitable for a high-resistance mountain area and a production process thereof, wherein the drop-out gap arrester comprises an arrester and a gap insulator, the arrester comprises a rain cap, a silicone rubber skirt sleeve and a drop-out device, the rain cap comprises an inverted U-shaped part and two sheet-shaped guide parts, the two sheet-shaped guide parts are connected with the lower part of one end of the inverted U-shaped part, and the other end of the inverted U-shaped part is connected with the upper end of an insulating rod; the falling device comprises a first conductive seat with a hook groove and a second conductive seat with a hook, the first conductive seat is connected with the lower end of the insulating rod, an arc-shaped guide groove is formed in the first conductive seat, and a guide protrusion matched with the arc-shaped guide groove is formed in the second conductive seat; 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 drop-out gap lightning arrester has high operation reliability and stability and low maintenance cost.
Description
Technical Field
The invention belongs to the technical field of lightning arresters, and particularly relates to a drop-out gap lightning arrester suitable for a high-resistance mountain area and a production process thereof.
Background
The 10kV overhead distribution line is wide in distribution, long in line and complex in terrain, the insulation level of the 10kV overhead distribution line is low, the insulator can be enabled to be flashover by lightning overvoltage, and a power frequency follow current blowing wire is formed on a lightning stroke flashover channel. The main reason for the wire breakage is that an arc is established on a lightning flashover channel to form power frequency follow current, the temperature of an arc root is high, a wire can be blown in a short time, and even if the wire is a bare wire, if the passing current is large, the wire can be blown.
The current arc-angle puncture wire clamp mode adopted in the field of distribution network line lightning protection can effectively protect line wires and line insulators. However, this method is a natural arc extinction at the zero crossing point of the arc current, and has poor extinction capability, long extinction time, and possibility of re-ignition, so that the trip rate of the line cannot be reduced, and the automatic reclosing device needs to be matched. The traditional zinc oxide arrester and series gap arrester overvoltage protector mode can effectively protect insulators from arc damage, reduces line lightning trip-out rate, but has the defects of zinc oxide resistor piece high-voltage aging, resistor piece sealing failure damp, complex series gap manufacturing process and the like, and has the defects of difficult device installation caused by large weight and volume, high operation and maintenance cost and limitation of large-scale popularization and application in distribution networks.
Disclosure of Invention
The invention aims to provide a drop-out gap lightning arrester suitable for a high-resistance mountain area and a production process thereof, wherein the drop-out gap lightning arrester has high operation reliability and stability and low maintenance cost.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a drop-out clearance arrester suitable for high resistance mountain area, includes arrester and clearance insulator that links together, the arrester includes rain-proof cap, silicone rubber skirt cover and the ware that falls that sets up in the top, rain-proof cap formula structure as an organic whole, including an inversion U type portion and two slice guiding parts, two slice guiding parts are connected with the one end lower part of inversion U type portion, the other end of inversion U type portion links to each other with the upper end of insulator, be equipped with the conductive member of taking the draw-in groove in the inversion U type portion; the falling device comprises a first conductive seat with a hook groove and a second conductive seat with a hook, wherein the first conductive seat is connected with the lower end of the insulator, an arc-shaped guide groove is formed in the first conductive seat, and a guide protrusion matched with the arc-shaped guide groove is formed in the second conductive seat;
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, wherein the gap insulator body is sleeved outside 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 lightning arrester; the insulating rod of the lightning arrester is in conductive connection with the connecting pipe of the gap insulator through the conductive element.
Further, in the vertical direction, the centers of gravity of the first discharge ball and the second discharge ball are in a parallel state.
Further, the distance between the second discharge ball of the discharge screw and the first discharge ball of the striking rod is 30-50 mm.
Further, the insulating rod is a peroxide-cured silicone insulating rod.
Further, the high-voltage end electrode and the connecting pipe are respectively provided with a moisture-proof ring.
The invention also provides a production process of the drop-out gap lightning arrester suitable for the high-resistance mountain area, which comprises the following steps of:
s1, preparing a rain cap with an integrated structure, a lightning arrester main body structure with a silicone rubber skirt sleeve, and a first conductive seat and a second conductive seat of a falling device;
s2, assembling the lightning arrester, connecting the rain hat with the upper end of the main body structure of the lightning arrester, connecting the arc-shaped guide groove of the first conductive seat with the guide protrusion of the second conductive seat in a matched manner, and then connecting the second conductive seat with the lower part of the main body structure of the lightning arrester;
s3, preparing a gap insulator upper structure with an insulating rod and a gap insulator lower structure with an epoxy rod;
s4, abutting the upper and lower structures of the gap insulator to obtain a gap insulator main body, coating a coupling agent on the surface of the gap insulator main body, preheating, performing one-time compression molding on the mixed silicon rubber outside the gap insulator main body, and drying and vulcanizing to obtain the gap insulator;
and S5, connecting the rain hat with the upper end of the insulating rod, and connecting the first conductive seat with the lower end of the insulating rod to obtain the drop-out gap lightning arrester.
Further, the preparation method of the gap insulator lower structure comprises the following steps: and respectively buckling two ends of the epoxy rod of the gap insulator with the high-voltage end electrode and the connecting pipe to form a whole, independently manufacturing and forming, buckling the arc striking rod on the high-voltage end electrode, and screwing the discharge screw on the connecting pipe to ensure that a set distance is kept between a second discharge ball of the discharge screw and a first discharge ball of the arc striking rod so as to form a fixed air gap, thereby obtaining the lower structure of the gap insulator.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts a pure air gap structure to be isolated from the power grid, does not bear system voltage and system operation overvoltage, ensures that the power grid stably operates, reduces power-off or reclosing operation of a power supply system, enhances the reliability, prolongs the service life and reduces the maintenance cost.
2. The invention has good lightning impulse volt-second curve, action characteristic, stable and reliable discharge; the lightning arrester is not limited by voltage gradient of the voltage-sensitive characteristic resistor disc, and the installation and use environment conditions are greatly reduced in terms of volume, weight and installation height.
3. The insulating rod provided by the invention adopts the peroxide-cured organosilicon, has excellent tracking performance, mechanical performance, hydrophobicity and flame-retardant electrical performance, does not contain metal oxide pressure sensitive elements, and avoids the problems of high-voltage electrical aging and overheat damage.
4. The rain hat disclosed by the invention combines the traditional rain hat and the guide fork into a whole, ensures that the rain hat of the drop-out arrester has a guide function, and can simplify the assembly process, so that the production efficiency is easy to improve.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a gap insulator according to an embodiment of the present invention.
In the figure: 1. the lightning arrester, 102, a silicone rubber skirt sleeve, 103, a rain cap, 104, a falling device, 103a, an inverted U-shaped part, 103b, a sheet-shaped guide part, 104a, a first conductive seat, 104b, a second conductive seat, 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, 206, a second metal end, 207, a first discharge ball, 208, a second discharge ball, 209, a connecting pipe, 210, an air gap, 211, an insulating rod, 3 and a conductive piece.
Detailed Description
The technical solutions 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.
As shown in fig. 1-2, this embodiment provides a drop-out gap arrester suitable for high-resistance mountain areas, which comprises an arrester 1 and a gap insulator 2 that are integrally connected, wherein the arrester 1 comprises a rain hat 103, a silicone rubber skirt 102 and a drop device 104 that are arranged at the top, the rain hat 103 is of an integral structure, an inverted U-shaped part 103a and two sheet-shaped guiding parts 103b,103a and 103b are welded, and the sheet-shaped guiding parts 103b are connected with the arrester through threads, wherein each sheet-shaped guiding part 103b is connected with the lower edge of the right end of the corresponding inverted U-shaped part 103 a. The left end of the inverted U-shaped part 103a is connected with the upper end of the insulator 2, and a conductive member with a clamping groove is arranged in the inverted U-shaped part 103a, and the dropper 104 comprises a first conductive seat 104a with a hook groove and a second conductive seat 104b with a hook. The first conductive seat 104a is connected with the lower end of the insulator 2, an arc-shaped guide is arranged on the first conductive seat 104a, and a guide protrusion matched with the arc-shaped guide groove is arranged on the second conductive seat 104 b; 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 outside 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 lightning arrester 1; the insulating rod 211 of the lightning arrester 1 is electrically connected to the connecting tube 209 of the gap insulator 2 by means of a conductive element.
The connection mode of the rain cap and other parts of the lightning arrester can be realized by adopting threaded connection, clamping groove type connection, integral connection and buckle type connection.
The arc-shaped guide groove is a crescent guide groove, and the guide bulge is a crescent guide bulge. The hooking connection is to maintain the connection relationship, and the guide groove connection is to prevent the crescent guide projection hanger bar from completely disengaging from the hooking groove 1401.
In the vertical direction, the centers of gravity of the first discharge ball 207 and the second discharge ball 208 are in a parallel state.
The distance between the second discharge ball 208 of the discharge screw 205 and the first discharge ball 207 of the striking rod 204 is 30-50 mm.
The insulating rod 211 is a peroxide-cured silicone insulating rod.
The high-voltage terminal electrode 203 and the connecting pipe 209 are respectively provided with a moisture-proof ring.
The embodiment also provides a production process of the drop-out gap lightning arrester suitable for the high-resistance mountain area, which comprises the following steps of:
s1, preparing a rain cap with an integrated structure, a lightning arrester main body structure with a silicone rubber skirt sleeve, and a first conductive seat and a second conductive seat of a falling device;
s2, assembling the lightning arrester, connecting the rain hat with the upper end of the main body structure of the lightning arrester, connecting the arc-shaped guide groove of the first conductive seat with the guide protrusion of the second conductive seat in a matched manner, and then connecting the second conductive seat with the lower part of the main body structure of the lightning arrester;
s3, preparing a gap insulator upper structure with an insulating rod and a gap insulator lower structure with an epoxy rod;
s4, abutting the upper and lower structures of the gap insulator to obtain a gap insulator main body, coating a coupling agent on the surface of the gap insulator main body, preheating, performing one-time compression molding on the mixed silicon rubber outside the gap insulator main body, and drying and vulcanizing to obtain the gap insulator;
and S5, connecting the rain hat with the upper end of the insulating rod, and connecting the first conductive seat with the lower end of the insulating rod to obtain the drop-out gap lightning arrester.
The preparation method of the gap insulator lower structure comprises the following steps: and respectively buckling two ends of the epoxy rod of the gap insulator with the high-voltage end electrode and the connecting pipe to form a whole, independently manufacturing and forming, buckling the arc striking rod on the high-voltage end electrode, and screwing the discharge screw on the connecting pipe to ensure that a set distance is kept between a second discharge ball of the discharge screw and a first discharge ball of the arc striking rod so as to form a fixed air gap, thereby obtaining the lower structure of the gap insulator.
The lightning protection principle of the lightning arrester comprises the following steps: the 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 transmitted to the inside of the multistage gap arc extinguishing system. At this time, all the electrical gaps between the intermediate bead-type metal electrodes are discharged one by one. The lightning arrester system of the invention converts a large arc generated by high-power lightning overvoltage into a large number of small arcs, and the small arcs are discharged from a small arc extinguishing chamber between two adjacent electrodes. In the process of releasing the arc, the through hole is the arc extinguishing chamber, and the generated high-pressure gas blows the arc into the surrounding air, so that the arc is extinguished. The maximum extinction time is not more than 20 milliseconds. The power grid can stably run, and the power-off or reclosing operation of the power supply system is reduced.
The main technical parameters of the lightning arrester are as follows:
a. rated voltage: 15kV;
b. rated frequency: 50Hz;
c. lightning wave with effective value of body impact current residual voltage: less than or equal to 50 and kV;
d. rated bending load: 1 kN;
e. high current rush current peak 4/10 mus: not more than 65 and kA;
f. nominal discharge current peak 8/20 mus: 5 kA;
g. creepage ratio distance: 3.1 kV/cm;
h. industrial frequency wet withstand voltage: not less than 30 and kV;
i. lightning impulse 50% discharge voltage peak: not more than 85 and kV;
j. the lightning impulse action voltage requires an air gap of 50mm + -5 mm:
(1) the lightning strike flashover protector does not operate at or below the surge voltage 50 kV.
(2) The lightning strike flashover protector operates effectively at and above the surge voltage 80 kV.
The installation method of the lightning arrester comprises the following steps: and each base pole is provided with a product, does not need to be grounded specially, and is installed in a staggered manner.
The lightning arrester suitable for the high-resistance mountain area is isolated from the power grid by adopting the pure air gap structure, does not bear system voltage and system operation overvoltage, ensures that the power grid stably operates, reduces power-off or reclosing operation of a power supply system, enhances the reliability, prolongs the service life and reduces the maintenance cost; the lightning arrester has good lightning impulse volt-second curve, action characteristic and stable and reliable discharge; the lightning arrester is not limited by voltage gradient of the voltage-sensitive characteristic resistor disc, and the installation and use environment conditions are greatly reduced in terms of volume, weight and installation height. The lightning arrester insulating rod adopts the organic silicon solidified by the peroxide, has excellent tracking performance, mechanical performance, hydrophobicity and flame-retardant electrical performance, does not contain metal oxide pressure sensitive elements, and avoids the problems of high-voltage electrical aging and overheat damage.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (6)
1. The utility model provides a drop-out gap arrester suitable for high resistance mountain area, its characterized in that includes arrester (1) and gap insulator (2) that link together, arrester (1) is including setting up rain-proof cap (103), silicone rubber skirt cover (102) and drop ware (104) at top, rain-proof cap (103) are integrated into one piece structure, including an inversion U type portion (103 a) and two slice guiding parts (103 b), two slice guiding parts (103 b) are connected with the one end lower part of inversion U type portion (103 a), the other end of inversion U type portion (103 a) links to each other with the upper end of insulator, be equipped with the conductive component of taking the draw-in groove in inversion U type portion (103 a); the falling device (104) comprises a first conductive seat (104 a) with a hook groove and a second conductive seat (104 b) with a hook, the first conductive seat (104 a) is connected with the lower end of the insulator, an arc-shaped guide groove is formed in the first conductive seat (104 a), and a guide protrusion matched with the arc-shaped guide groove is formed in the second conductive seat (104 b);
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 rod (205) and a second metal end (206), wherein the gap insulator body (202) is sleeved outside the epoxy rod (201), the high-voltage end electrode (203) and the discharge screw rod (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 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 the second metal end (206) is arranged at one end far away from the lightning arrester (1). The insulating rod (211) of the lightning arrester (1) is in conductive connection with the connecting pipe (209) of the gap insulator (2) through a conductive element;
the production process of the drop-out gap lightning arrester suitable for the mountain area with high resistance comprises the following steps of:
s1, preparing a rain cap with an integrated structure, a lightning arrester main body structure with a silicone rubber skirt sleeve, and a first conductive seat and a second conductive seat of a falling device;
s2, assembling the lightning arrester, connecting the rain hat with the upper end of the main body structure of the lightning arrester, connecting the arc-shaped guide groove of the first conductive seat with the guide protrusion of the second conductive seat in a matched manner, and then connecting the second conductive seat with the lower part of the main body structure of the lightning arrester;
s3, preparing a gap insulator upper structure with an insulating rod and a gap insulator lower structure with an epoxy rod;
s4, abutting the upper and lower structures of the gap insulator to obtain a gap insulator main body, coating a coupling agent on the surface of the gap insulator main body, preheating, performing one-time compression molding on the mixed silicon rubber outside the gap insulator main body, and drying and vulcanizing to obtain the gap insulator;
and S5, connecting the rain hat with the upper end of the insulating rod, and connecting the first conductive seat with the lower end of the insulating rod to obtain the drop-out gap lightning arrester.
2. A drop-out gap arrestor for high resistance mountainous areas according to claim 1, characterized in that the centers of gravity of the first (207) and second (208) discharge balls are in a parallel state in the vertical direction.
3. A drop-out gap arrestor for high resistance mountainous areas according to claim 1, characterized in that the distance between the second discharge ball (208) of the discharge screw (205) and the first discharge ball (207) of the striking rod (204) is 30-50 mm.
4. A drop-out gap arrestor suitable for use in high resistance mountain areas as claimed in claim 1, wherein the insulating rod (211) is a peroxide cured silicone insulating rod.
5. The drop-out gap lightning arrester suitable for high-resistance mountain areas according to claim 1, wherein the high-voltage terminal electrode (203) and the connecting pipe (209) are provided with moisture-proof rings.
6. The drop-out gap lightning arrester suitable for high-resistance mountain areas according to claim 1, wherein the preparation method of the gap insulator lower structure is as follows: and respectively buckling two ends of the epoxy rod of the gap insulator with the high-voltage end electrode and the connecting pipe to form a whole, independently manufacturing and forming, buckling the arc striking rod on the high-voltage end electrode, and screwing the discharge screw on the connecting pipe to ensure that a set distance is kept between a second discharge ball of the discharge screw and a first discharge ball of the arc striking rod so as to form a fixed air gap, thereby obtaining the lower structure of the gap insulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111064101.1A CN113782288B (en) | 2021-09-10 | 2021-09-10 | Drop-out gap lightning arrester suitable for high-resistance mountain area and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111064101.1A CN113782288B (en) | 2021-09-10 | 2021-09-10 | Drop-out gap lightning arrester suitable for high-resistance mountain area and production process thereof |
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| CN113782288B true CN113782288B (en) | 2023-05-12 |
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| CN205789354U (en) * | 2016-07-06 | 2016-12-07 | 常德威迪电气有限责任公司 | Drop-type arrester |
| CN105976955A (en) * | 2016-07-06 | 2016-09-28 | 常德威迪电气有限责任公司 | Falling type lightning arrester |
| CN112909741A (en) * | 2021-01-22 | 2021-06-04 | 国网福建省电力有限公司南平市延平区供电公司 | Multi-chamber lightning arrester suitable for high-resistance mountainous area and production process thereof |
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