CN115693406A - Structured medium-voltage overhead line lightning protection device - Google Patents
Structured medium-voltage overhead line lightning protection device Download PDFInfo
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- CN115693406A CN115693406A CN202211310998.6A CN202211310998A CN115693406A CN 115693406 A CN115693406 A CN 115693406A CN 202211310998 A CN202211310998 A CN 202211310998A CN 115693406 A CN115693406 A CN 115693406A
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Abstract
The invention discloses a structured medium-voltage overhead line lightning protection device which comprises a connecting bracket, a supporting insulator and a plurality of arc extinguishing structure units, wherein the connecting bracket is arranged on the upper part of the connecting bracket; the connecting support is fixedly installed at the top and the bottom of the pin type composite insulator, the arc extinguishing structural units are symmetrically arranged from high to low, each arc extinguishing structural unit is of a semicircular structure, and an air gap outer electrode is arranged on each arc extinguishing structural unit. The arc extinguishing structural unit of the structured medium-voltage overhead line lightning protection device adopts an independent arc extinguishing chamber structure, has good high-temperature resistance and heat insulation performance, and can greatly prolong the service life of equipment; in addition, the arc extinguishing structural unit of the structured medium-voltage overhead line lightning protection device adopts a structural design, and as an independent component in a lightning protection product, the arc extinguishing structural unit or the independent arc extinguishing cavity structure can be replaced only when necessary, so that the whole replacement of the lightning protection device is avoided, the cost is saved, and the maintenance is facilitated.
Description
Technical Field
The invention relates to a lightning protection device technology, in particular to a structured medium-voltage overhead line lightning protection device.
Background
The composite outer sleeve of the multi-cavity gap body of the multi-cavity structure lightning arrester is easily burnt under the high-temperature and high-heat effects of multiple arc blowing, the arc blowing performance is gradually deteriorated, and the service life and the reliability of the whole equipment are influenced; generally, the whole lightning arrester needs to be replaced integrally after a core component of the lightning arrester is in failure or damaged, and the lightning arrester is inconvenient to maintain.
Disclosure of Invention
In order to solve the problems, the invention provides a structured medium-voltage overhead line lightning protection device, an arc extinguishing structural unit of which adopts an independent arc extinguishing chamber structure, has good high-temperature resistance and heat insulation performance, and can greatly prolong the service life of equipment; in addition, the arc extinguishing structural unit of the structured medium-voltage overhead line lightning protection device adopts a structural design, and as an independent component in a lightning protection product, the structural unit can be conveniently disassembled and assembled, and the whole replacement of the lightning protection device can be avoided only by replacing the arc extinguishing structural unit or the independent arc extinguishing cavity structure when necessary, so that the cost is saved, and the structural unit is convenient to maintain.
The technical scheme adopted by the invention is as follows:
a structured medium-voltage overhead line lightning protection device comprises a connecting bracket, a supporting insulator and a plurality of arc extinguishing structure units; the utility model discloses a high-voltage arc extinguishing structure unit, including support insulator, connecting bracket, and all the other arc extinguishing structure units, support insulator is pin type composite insulator, connecting bracket fixed mounting is in pin type composite insulator's top and bottom, support insulator can install on the overhead line of middling pressure through connecting bracket, set up by high to low symmetry among a plurality of arc extinguishing structure units, the arc extinguishing structure unit that is located the highest place and is located the lowest installs on connecting bracket, all the other arc extinguishing structure units are installed on support insulator, every arc extinguishing structure unit all is semi-circular structure, be equipped with the air gap outer electrode on the arc extinguishing structure unit, be formed with outer air gap between arc extinguishing structure unit and the arc extinguishing structure unit.
Further, the arc extinguishing structural unit comprises a bracket connecting accessory, a mounting rail and a plurality of independent arc extinguishing cavities; the mounting rail is a semicircular rail, an open slot matched with the independent arc extinguishing cavity for mounting is formed in the outer side of the mounting rail, and the inner side of the mounting rail is connected with the bracket connecting accessory; the independent arc extinguishing cavities are arranged in an open slot of the mounting rail in a sliding manner, and are connected and detachable through metal electrodes; the number of independent arc extinguishing cavities can be adjusted according to the voltage class of the overhead line.
Further, the independent arc extinguishing cavity comprises a short-gap arc extinguishing chamber and an air spraying chamber; the short-gap arc extinguish chamber is of a cuboid structure made of ceramic or high-molecular insulating materials, holes are formed in the left end face, the right end face and the upper end face of the short-gap arc extinguish chamber, the lower end face of the short-gap arc extinguish chamber is an arc face matched with the arc-shaped track, the three holes are communicated smoothly, and metal electrodes can be inserted into the holes in the left end face and the right end face; the air spraying chamber is of a cylinder structure made of ceramic or high-molecular insulating materials and is fixedly mounted on the upper end face of the short-gap arc extinguishing chamber, a penetrating air spraying outlet is formed in the air spraying chamber, and the air spraying outlet is communicated with a hole in the upper end face of the short-gap arc extinguishing chamber.
Furthermore, an air gap is formed between the two metal electrodes inserted into the holes on the left end surface and the right end surface of the short-gap arc extinguish chamber, and the air gap is positioned between the insertion ends of the two metal electrodes.
Furthermore, holes in the left end face and the right end face of the short-gap arc extinguish chamber are located on a concentric circle with the installation rail as the circle center, and the holes in the left end face and the right end face of the short-gap arc extinguish chamber are communicated with the inside of the short-gap arc extinguish chamber; the central axis of the hole on the upper end face of the short-gap arc extinguish chamber is vertically intersected with the central axes of the holes on the left end face and the right end face, and the intersection point is positioned at the central point of the central axes of the holes on the left end face and the right end face; the holes of the left end face, the right end face and the upper end face are respectively located at the center positions of planes, and the three holes are communicated with each other smoothly.
Further, be equipped with the constant head tank of the short clearance explosion chamber of cooperation in the mounting rail outside open slot, be equipped with the locating pin that can slide in the constant head tank on the terminal surface around the short clearance explosion chamber.
Furthermore, the metal electrode is a circular arc-shaped cylinder made of a high-strength metal material, the surface of the metal electrode is polished smoothly, two ends of the metal electrode are inserted into the two adjacent short-gap arc-extinguishing chambers through holes in the left end face and the right end face of the two adjacent short-gap arc-extinguishing chambers respectively, and the middle of the metal electrode is exposed outside the two short-gap arc-extinguishing chambers.
Furthermore, the outer sides of the independent arc extinguishing cavities positioned on two sides in the plurality of independent arc extinguishing cavities are connected with the air gap outer electrodes.
Further, this structured medium voltage overhead line lightning protection device can satisfy the overhead line's of different voltage classes lightning protection demand through the quantity of adjustment arc extinguishing structure unit or independent arc extinguishing cavity.
The beneficial effects of the invention are:
the arc extinguishing structure unit of the structured medium-voltage overhead line lightning protection device adopts an independent arc extinguishing chamber structure, has good high temperature resistance and heat insulation performance, and can greatly prolong the service life of equipment; in addition, the arc extinguishing structural unit of the structured medium-voltage overhead line lightning protection device adopts a structural design, and as an independent component in a lightning protection product, the arc extinguishing structural unit or the independent arc extinguishing cavity structure can be replaced only when necessary, so that the whole replacement of the lightning protection device is avoided, the cost is saved, and the maintenance is facilitated. In addition, the independent arc extinguishing chamber structure main body of the arc extinguishing structure unit is made of ceramic materials, has good high temperature resistance and heat insulation performance, can well protect the insulating layer of the arc blowing lightning protection equipment from being burnt, greatly prolongs the service life of the lightning protection equipment, and enhances the reliability of the lightning protection equipment.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of an arc extinguishing structural unit according to the present invention;
FIG. 3 is a schematic diagram of the connection of several independent arc extinguishing chambers according to the present invention;
FIG. 4 is a schematic diagram of the internal structure of an independent arc extinguishing chamber according to the present invention;
FIG. 5 is a schematic view of the connection of the mounting rail to the independent arc extinguishing chamber according to the present invention;
in fig. 1-5, 1-connecting bracket, 2-supporting insulator, 3-arc extinguishing structural unit, 4-air gap external electrode, 5-external air gap, 6-bracket connecting fitting, 7-mounting rail, 8-independent arc extinguishing cavity, 9-open slot, 10-metal electrode, 11-short gap arc extinguishing chamber, 12-air spraying chamber, 13-hole, 14-air spraying outlet, 15-air gap, 16-positioning slot, 17-positioning pin.
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 of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without inventive step, are within the scope of the present invention.
The embodiment discloses a structured medium-voltage overhead line lightning protection device, as shown in fig. 1, the structured medium-voltage overhead line lightning protection device comprises a connecting bracket 1, a supporting insulator 2 and four arc extinguishing structural units 3; wherein, support insulator 2 is the synthetic insulator of pin type, connecting bracket 1 fixed mounting is in the top and the bottom of the synthetic insulator of pin type, support insulator 2 can install on the overhead line of middling pressure through connecting bracket 1, set up by high to low symmetry in four arc extinguishing constitutional units 3, the arc extinguishing constitutional unit 3 that is located the highest point and is located the lowest is installed on connecting bracket 1, all the other two arc extinguishing constitutional units 3 are installed on support insulator 2, every arc extinguishing constitutional unit 3 all is the semicircular structure, be equipped with outer electrode 4 in the air gap on the arc extinguishing constitutional unit 3, be formed with outer air gap 5 between arc extinguishing constitutional unit 3 and the arc extinguishing constitutional unit 3.
The structured medium-voltage overhead line lightning protection device is installed on a 35kV medium-voltage overhead line, a conductive drainage wire is connected below the arc extinguishing structure unit 3 located at the lowest position, electric arcs are transmitted between the four arc extinguishing structure units 3 through the outer electrode 4 and the outer air gap 5 in the air gap from bottom to top, and each arc extinguishing structure unit 3 absorbs the energy of the electric arc by using a solid medium to accelerate the cooling of the electric arc to extinguish the electric arc or enable the electric arc to rapidly pass through a low-temperature medium to be in close contact with the low-temperature medium to be cooled. At this time, under the strong diffusion and recombination action, ionization is greatly weakened, deionization is greatly enhanced, and arc extinction is completed in a certain arc extinction structural unit 3. This structured medium voltage overhead line lightning protection device's arc extinguishing structural unit 3 adopts the structural design, and as independent subassembly in the lightning protection product, make things convenient for the dismouting, when the overhead line in the face of different voltage classes, the distance of outer air gap 5 between 3 quantity of adjustable arc extinguishing structural unit, the arc extinguishing structural unit 3 to satisfy the lightning protection demand of the overhead line of different voltage classes. In addition, the arc extinguishing structural unit 3 can be replaced only when necessary, so that the overall replacement of the lightning protection device is avoided, the cost is saved, and the maintenance is convenient.
Compare a plurality of arc extinguishing constitutional units 3 with current lightning protection device by the height to the biggest advantage of low mode of setting up in can adjusting outer air gap 5 according to different operational environment to adapt to different circuit demands, effectively avoid the lightning protection in-process that fixed distance's outer air gap 5 brought the not enough frequent maloperation problem that causes of refusing of arcing voltage and the not enough arouses in clearance. In addition, the arc extinguishing structural units 3 are symmetrically arranged from high to low, so that the contact length and area of the electric arc and the external cold air can be increased in the gas spraying process, and the arc extinguishing is facilitated; meanwhile, aerodynamic force in all directions in the gas spraying process is balanced, so that the device is stressed uniformly in all directions, and the long-term stable operation of the lightning protection device is ensured.
The specific structure and function of the further arc extinguishing structural unit 3 are as follows:
as shown in fig. 2 and 5, each arc extinguishing structural unit 3 includes a bracket connecting fitting 6, a mounting rail 7 and a plurality of independent arc extinguishing chambers 8; the installation track 7 is a semicircular track, the radius range of the arc is 200mm-300mm, the outer side of the installation track 7 is provided with an open slot 9 which is matched with the independent arc extinguishing cavity 8 for installation, the width of the open slot 9 is 8mm-23mm, and the inner side of the installation track 7 is connected with the bracket connecting accessory 6; as shown in fig. 3, the independent arc extinguishing cavities 8 are slidably mounted in the open slot 9 of the mounting rail 7, a positioning slot 16 is arranged in the open slot 9, the independent arc extinguishing cavities 8 and the independent arc extinguishing cavities 8 are connected and detachable through metal electrodes 10, and the outer sides of the independent arc extinguishing cavities 8 on two sides in the independent arc extinguishing cavities 8 are connected with the air gap outer electrode 4. Each arc extinguishing structural unit 3 can be installed on the insulator through the bracket connecting fittings 6, and the number of the independent arc extinguishing cavities 8 can be adjusted according to the voltage grade of the overhead line.
Arc extinguishing structure unit 3 designs for arc and compares linear type arc extinguishing structure, and the length and the surface area of electric arc after blowing arc are bigger, can lengthen electric arc more fast, are favorable to cooling electric arc and the diffusion of electrified mass point for the recovery of medium intensity, have more advantages in the arc extinguishing effect. Secondly, arc extinguishing structure unit 3 designs for arc, and occupation space is little, and is compacter, and especially when utilizing this arc extinguishing structure combination of multi-disc to become higher voltage level lightning protection device, the circular arc type structure can be more advantageous on spatial layout. In addition, considering that the lightning arrester runs outdoors, the general wind speed is higher, and the arc-shaped structure is less influenced by the wind force than a linear structure after being installed, so that the stability of the lightning arrester can be improved.
The specific structure and function of the further independent arc extinguishing chamber 8 are as follows:
as shown in fig. 4 and 5, the independent arc extinguishing chamber 8 includes a short-gap arc extinguishing chamber 11 and an air injection chamber 12; short clearance explosion chamber 11 is ceramic or polymer insulating material's cuboid structure, length scope 13mm-15mm, width scope 9mm-11mm, thickness scope 8mm-23mm, short clearance explosion chamber 11's left end face, right-hand member face and up end all are equipped with hole 13, the hole 13 diameter on left end face, the right-hand member face is 11mm-15mm, short clearance explosion chamber 11's lower terminal surface is the circular arc face of cooperation circular arc orbital, the circular arc radian is 120-270, smooth intercommunication between three hole 13, metal electrode 10 can be inserted to hole 13 on left end face, the right-hand member face, be equipped with on the short clearance explosion chamber 11 front and back terminal surface and can be in gliding locating pin 17 of constant head tank 16. The air injection chamber 12 is of a cylinder structure made of ceramic or high polymer insulating materials, the length range is 23mm-28mm, the air injection chamber 12 is fixedly installed on the upper end face of the short-gap arc extinguish chamber 11, a penetrating air injection outlet 14 is arranged on the air injection chamber 12, the diameter range of the air injection outlet 14 is 3mm-5mm, the air injection outlet 14 is communicated with a hole 13 in the upper end face of the short-gap arc extinguish chamber 11, and the air injection outlet is inclined downwards by an angle ranging from 5 degrees to 30 degrees towards an arc horizontal plane. Holes 13 on the left end surface and the right end surface of the short-gap arc extinguish chamber 11 are positioned on a concentric circle with the mounting rail 7 as the center of a circle, and the holes 13 on the left end surface and the right end surface of the short-gap arc extinguish chamber 11 are communicated inside the short-gap arc extinguish chamber 11; the central axis of the hole 13 on the upper end surface of the short-gap arc extinguish chamber 11 is vertically intersected with the central axes of the holes 13 on the left end surface and the right end surface, and the intersection point is positioned at the central point of the central axes of the holes 13 on the left end surface and the right end surface; the holes 13 on the left end face, the right end face and the upper end face are respectively positioned at the center of the plane, and the insides of the three holes are smoothly communicated. The holes 13 on the left end surface, the right end surface and the upper end surface are respectively positioned at the center of the plane, and the interiors of the three holes are smoothly communicated; the holes 13 on the left end face and the right end face can be inserted with the metal electrodes 10, so that the independent arc extinguishing cavities 8 can be connected in series through the metal electrodes 10, and the holes 13 on the upper end face of the short-gap arc extinguishing chamber 11 are communicated with the air injection outlet 14 of the air injection chamber 12, so that high temperature and high heat during arc extinguishing can be discharged; in addition, an air gap 15 is formed between the two metal electrodes 10 inserted from the holes 13 on the left end surface and the right end surface of the short-gap arc extinguish chamber 11 in each independent arc extinguish chamber 8, the air gap 15 is positioned between the insertion ends of the two metal electrodes 10, and the air gap 15 is used for extinguishing arcs. The metal electrode 10 is an arc-shaped cylinder made of a high-strength metal material, the surface of the metal electrode is polished smooth, two ends of the metal electrode are respectively inserted into the two adjacent short-gap arc-extinguishing chambers 11 through holes 13 on the left end face and the right end face of the two adjacent short-gap arc-extinguishing chambers 11, and the middle of the metal electrode is exposed outside the two short-gap arc-extinguishing chambers 11.
The short-gap arc extinguish chamber 11 and the gas spraying chamber 12 of each independent arc extinguish chamber 8 are made of ceramic or polymer insulating materials, and the volumes of the short-gap arc extinguish chamber 11 and the gas spraying chamber 12 cannot instantaneously expand at high temperature and high pressure in the arc extinguish process, so that the gas pressure in the short-gap arc extinguish chamber 11 is higher; the high-temperature gas can blow arc under larger pressure in the arc extinguishing process, so that the arc is elongated, the compounding and the diffusion of charged particles are enhanced, the charged particles in an arc gap are blown away, and the effects of cooling the arc, weakening heat dissociation and quickly recovering the dielectric strength of a medium are achieved; compared with the existing arc extinguishing cavities, each arc extinguishing cavity in the arc extinguishing structural unit 3 is independent, the number of the arc extinguishing cavities can be split and adjusted, and the arc extinguishing time of each independent arc extinguishing cavity 8 is shorter and the efficiency is higher.
In conclusion, the arc extinguishing structural unit 3 of the structured medium-voltage overhead line lightning protection device adopts an independent arc extinguishing chamber structure, has good high-temperature resistance and heat insulation performance, and can greatly prolong the service life of equipment; in addition, the arc extinguishing structural unit 3 of the structured medium-voltage overhead line lightning protection device adopts a structured design, is taken as an independent component in a lightning protection product, is convenient to disassemble and assemble, can only replace the arc extinguishing structural unit 3 or an independent arc extinguishing cavity structure when necessary, avoids the whole replacement of the lightning protection device, saves the cost and is convenient to maintain; in addition, the main structure body of the independent arc extinguishing chamber of the arc extinguishing structural unit 3 is made of ceramic materials, so that the high-temperature resistance and heat insulation performance are good, the insulating layer of the arc blowing lightning protection equipment can be well protected from being burnt, the service life of the lightning protection equipment is greatly prolonged, and the reliability of the lightning protection equipment is enhanced; by combining the advantages, the structured medium-voltage overhead line lightning protection device can meet the lightning protection requirements of overhead lines with different voltage levels by adjusting the number of the arc extinguishing structure units 3 or the independent arc extinguishing cavities 8.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a structured middling pressure overhead line lightning protection device which characterized in that: the structured medium-voltage overhead line lightning protection device comprises a connecting bracket, a supporting insulator and a plurality of arc extinguishing structure units; the utility model discloses a high-voltage arc extinguishing structure unit, including support insulator, connecting bracket, and all the other arc extinguishing structure units, support insulator is pin type composite insulator, connecting bracket fixed mounting is in pin type composite insulator's top and bottom, support insulator can install on the overhead line of middling pressure through connecting bracket, set up by high to low symmetry among a plurality of arc extinguishing structure units, the arc extinguishing structure unit that is located the highest place and is located the lowest installs on connecting bracket, all the other arc extinguishing structure units are installed on support insulator, every arc extinguishing structure unit all is semi-circular structure, be equipped with the air gap outer electrode on the arc extinguishing structure unit, be formed with outer air gap between arc extinguishing structure unit and the arc extinguishing structure unit.
2. The structured medium voltage overhead line lightning protection device according to claim 1, characterized in that: the arc extinguishing structural unit comprises a bracket connecting accessory, a mounting rail and a plurality of independent arc extinguishing cavities; the mounting rail is a semicircular rail, an open slot matched with the independent arc extinguishing cavity for mounting is formed in the outer side of the mounting rail, and the inner side of the mounting rail is connected with the bracket connecting accessory; the independent arc extinguishing cavities are arranged in the open grooves of the mounting rail in a sliding mode, and are connected and detachable through metal electrodes; the number of independent arc extinguishing cavities can be adjusted according to the voltage class of the overhead line.
3. The structured medium voltage overhead line lightning protection device according to claim 2, characterized in that: the independent arc extinguishing cavity comprises a short-gap arc extinguishing chamber and an air spraying chamber; the short-gap arc extinguish chamber is of a cuboid structure made of ceramic or high-molecular insulating materials, holes are formed in the left end face, the right end face and the upper end face of the short-gap arc extinguish chamber, the lower end face of the short-gap arc extinguish chamber is an arc face matched with the arc-shaped track, the three holes are communicated smoothly, and metal electrodes can be inserted into the holes in the left end face and the right end face; the air spraying chamber is of a cylinder structure made of ceramic or high-molecular insulating materials and is fixedly mounted on the upper end face of the short-gap arc extinguishing chamber, a penetrating air spraying outlet is formed in the air spraying chamber, and the air spraying outlet is communicated with a hole in the upper end face of the short-gap arc extinguishing chamber.
4. The structured medium voltage overhead line lightning protection device according to claim 3, wherein: an air gap is formed between the two metal electrodes inserted into the holes on the left end surface and the right end surface of the short-gap arc extinguish chamber, and the air gap is positioned between the insertion ends of the two metal electrodes.
5. The structured medium voltage overhead line lightning protection device according to claim 3, characterized in that: holes in the left end face and the right end face of the short-gap arc extinguish chamber are positioned on a concentric circle with the installation track as the circle center, and the holes in the left end face and the right end face of the short-gap arc extinguish chamber are communicated with the inside of the short-gap arc extinguish chamber; the central axis of the hole on the upper end face of the short-gap arc extinguish chamber is vertically intersected with the central axes of the holes on the left end face and the right end face, and the intersection point is positioned at the central point of the central axes of the holes on the left end face and the right end face; the holes of the left end face, the right end face and the upper end face are respectively positioned at the center of the plane, and the insides of the three holes are smoothly communicated.
6. The structured medium voltage overhead line lightning protection device according to claim 3, wherein: the mounting rail is characterized in that a positioning groove matched with the short-gap arc extinguish chamber is formed in an open groove in the outer side of the mounting rail, and positioning pins capable of sliding in the positioning groove are arranged on the front end face and the rear end face of the short-gap arc extinguish chamber.
7. The structured medium voltage overhead line lightning protection device according to claim 2, characterized in that: the metal electrode is a circular arc-shaped cylinder made of a high-strength metal material, the surface of the metal electrode is polished smoothly, two ends of the metal electrode are inserted into the two adjacent short-gap arc-extinguishing chambers through holes in the left end face and the right end face of the two adjacent short-gap arc-extinguishing chambers respectively, and the middle of the metal electrode is exposed out of the two short-gap arc-extinguishing chambers.
8. The structured medium voltage overhead line lightning protection device according to claim 2, characterized in that: the outer sides of the independent arc extinguishing cavities positioned at two sides in the plurality of independent arc extinguishing cavities are connected with the outer electrode of the air gap.
9. The structured medium voltage overhead line lightning protection device according to claim 1, characterized in that: the structured medium-voltage overhead line lightning protection device can meet the lightning protection requirements of overhead lines with different voltage grades by adjusting the number of the arc extinguishing structure units or the independent arc extinguishing cavities.
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| CN202211310998.6A CN115693406B (en) | 2022-10-25 | 2022-10-25 | Structured medium-voltage overhead line lightning protection device |
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| CN202211310998.6A CN115693406B (en) | 2022-10-25 | 2022-10-25 | Structured medium-voltage overhead line lightning protection device |
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| CN115693406B CN115693406B (en) | 2023-08-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217112A (en) * | 2018-09-30 | 2019-01-15 | 武汉微创元电子科技有限责任公司 | Combined arrester based on dish type Multiple level arc extinguishing lightning protection device |
| CN109273988A (en) * | 2018-09-30 | 2019-01-25 | 武汉微创元电子科技有限责任公司 | Dish type Multiple level arc extinguishing lightning protection device based on double hemisphere T-type ceramic discharge tubes |
| CN210349473U (en) * | 2019-04-22 | 2020-04-17 | 中国电力科学研究院有限公司 | Composite insulator device with built-in piezoresistor unit |
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2022
- 2022-10-25 CN CN202211310998.6A patent/CN115693406B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217112A (en) * | 2018-09-30 | 2019-01-15 | 武汉微创元电子科技有限责任公司 | Combined arrester based on dish type Multiple level arc extinguishing lightning protection device |
| CN109273988A (en) * | 2018-09-30 | 2019-01-25 | 武汉微创元电子科技有限责任公司 | Dish type Multiple level arc extinguishing lightning protection device based on double hemisphere T-type ceramic discharge tubes |
| CN210349473U (en) * | 2019-04-22 | 2020-04-17 | 中国电力科学研究院有限公司 | Composite insulator device with built-in piezoresistor unit |
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