CN220272237U - Arrester core and arrester - Google Patents
Arrester core and arrester Download PDFInfo
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- CN220272237U CN220272237U CN202321558660.2U CN202321558660U CN220272237U CN 220272237 U CN220272237 U CN 220272237U CN 202321558660 U CN202321558660 U CN 202321558660U CN 220272237 U CN220272237 U CN 220272237U
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- 239000004593 Epoxy Substances 0.000 claims description 5
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000011900 installation process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The embodiment discloses a lightning arrester core and a lightning arrester, wherein the lightning arrester core comprises a core unit and a discharge gap assembly which are sequentially connected in a multi-section manner and have the same structure; the discharge gap assembly is connected with the core units at the lowest section, and each core unit comprises a first electrode, a second electrode, a resistor disc and a plurality of first insulating rods; the first electrode and the second electrode are respectively stuck to two ends of the resistor disc and are connected with the resistor disc, a first connecting hole is formed in the surface, deviating from the resistor disc, of the first electrode, and a second connecting hole is formed in the surface, deviating from the resistor disc, of the second electrode; the plurality of first insulating rods are wound on the periphery of the resistor disc, and two ends of each first insulating rod are respectively connected with the first electrode and the second electrode; the adjacent core units are fixedly connected through connecting columns. The problem that the concentricity of the resistor pieces is easy to deviate in the installation process can be effectively reduced, the resistor pieces are ensured to be stressed uniformly, the resistor pieces are prevented from being damaged, and reliable electrical contact can be realized between the resistor pieces.
Description
Technical Field
The utility model relates to the technical field of lightning protection engineering, in particular to a lightning arrester core body and a lightning arrester.
Background
Because 35kV overhead lines in China are mostly not erected with overhead lightning conductors, when lightning directly strikes the conductors, particularly high-amplitude lightning current strikes the conductors of nearby line arresters, large impact current can be generated, and the arrester body needs to bear the impact current and discharge the impact current into the ground, so that a power system can stably operate. The impact energy tolerance of the lightning arrester affects the operation effect and the self failure rate of the line lightning arrester.
The existing lightning arrester core body with the 35kV cage-shaped structure consists of a resistor disc, electrodes and a first insulating rod, wherein the electrodes are arranged at two ends of the resistor disc, and the first insulating rod is arranged outside the resistor disc. The interface treatment between the resistive sheets is one of the key factors affecting the electrical performance of the arrester, and sufficiently good contact of the end aluminum conductive layers between the resistive sheets will facilitate an increase in the high current tolerance level of the resistive sheets. At present, in the production process of the lightning arrester core body, the production quality requirement on workers is high due to the fact that the number of the resistor discs to be assembled is large. In addition, be difficult to guarantee the concentricity of resistance card when stacking a lot of resistance card, can exist the deviation because of the resistance card concentricity like this to when making the electrode at both ends exert pressure and fix the resistance card, can make the resistance card atress uneven, easily make the resistance card receive the damage, thereby influence the electrical property of resistance card.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a lightning arrester core body and a lightning arrester.
In a first aspect, an embodiment of the present application provides a lightning arrester core, including a plurality of core units and a discharge gap assembly, where the core units are sequentially connected and have the same structure;
the discharge gap assembly is connected with the core unit at the lowest section;
each core unit comprises a first electrode, a second electrode, a resistor disc and a plurality of first insulating rods;
the first electrode and the second electrode are respectively attached to two ends of the resistor disc and are connected with the resistor disc, a first connecting hole is formed in the surface, facing away from the resistor disc, of the first electrode, and a second connecting hole is formed in the surface, facing away from the resistor disc, of the second electrode;
the plurality of first insulating rods are wound on the periphery of the resistor disc, and two ends of each first insulating rod are respectively connected with the first electrode and the second electrode;
wherein, adjacent core units are fixedly connected through connecting columns.
In one embodiment, a first mounting groove is formed in one end, facing the resistor disc, of the first electrode, a second mounting groove is formed in one end, facing the resistor disc, of the second electrode, and two ends of the resistor disc are respectively clamped into the first mounting groove and the second mounting groove.
In one embodiment, the diameters of the first and second mounting grooves are equal to the diameter of the resistor sheet.
In one embodiment, the first electrode is provided with a plurality of first blind holes along a first direction, and the plurality of first blind holes are distributed on the periphery of the first mounting groove;
the second electrode is provided with a plurality of second blind holes along the first direction, and the second blind holes are distributed on the periphery of the second mounting groove;
the two ends of the first insulating rod are respectively inserted into the first blind hole and the second blind hole to be fixed.
In one embodiment, the first insulating rod is an epoxy fiberglass rod.
In one embodiment, the discharge gap assembly comprises a first discharge electrode, a second discharge electrode and a second insulating rod, wherein the first discharge electrode and the second discharge electrode are respectively fixed at two ends of the second insulating rod, and the first discharge electrode is connected with the second electrode in the core unit at the lowest section;
the outer side face of the first discharge electrode is connected with a first discharge section, the outer side face of the second discharge electrode is connected with a second discharge section, the second discharge section and the first discharge section are located on the same side, and a discharge gap is formed between the second discharge section and the first discharge section.
In one embodiment, a third connecting hole is formed in the surface, facing away from the second insulating rod, of the first discharge electrode, a mounting column is inserted into the third connecting hole, and the other end of the mounting column is inserted into the second connecting hole in the lowest section of the core unit.
In one embodiment, a first threaded hole is formed in the outer side surface of the first discharge electrode, and a first external thread matched with the first threaded hole is formed at the end part of the first discharge section;
the outer side face of the second discharge electrode is provided with a second threaded hole, and the end part of the second discharge section is provided with a second external thread matched with the second threaded hole.
In a second aspect, the embodiment further provides a lightning arrester, including an outer sleeve and the lightning arrester core body of the first aspect, where the lightning arrester core body is disposed in the outer sleeve.
Compared with the prior art, the above technical scheme provided by the embodiment of the application has the beneficial effects that:
the lightning arrester core is formed by sequentially connecting the plurality of sections of core units, each section of core unit adopts the first electrode, the second electrode and the resistor disc arranged between the first electrode and the second electrode, so that the resistor disc can be installed in a segmented mode, compared with the traditional mode of stacking and installing a plurality of resistor discs, the problem that the concentricity of the resistor disc is easy to deviate in the installation process can be effectively reduced, the stress uniformity of the resistor disc is ensured, and the resistor disc is prevented from being damaged by mechanical force; the dislocation of the resistor pieces caused by process spread in the batch production process can be avoided, so that the resistor pieces are reliably in electrical contact, and side flashover during operation is prevented; the discharge gap can isolate the system voltage in a non-lightning state, and long-term charged operation of the resistor disc is avoided. In addition, the lightning arrester core body can be produced in sections and then combined during production, so that the process difficulty and the production cost are effectively reduced.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a lightning arrester core of the present application;
fig. 2 is a schematic structural view of a lightning arrester core in which two core units are connected;
fig. 3 is a schematic structural view of a first electrode in a lightning arrester core according to the present application;
fig. 4 is a schematic view of the structure of the lightning arrester core at another angle;
fig. 5 is a schematic structural view of a second electrode in a lightning arrester core according to the present application;
fig. 6 is a schematic view of a structure of a second electrode in a lightning arrester core according to another angle of the present application;
fig. 7 is a schematic diagram of connection of a core unit in a lightning arrester core to a discharge gap device.
Reference numerals in the drawings:
10. a lightning arrester core; 11. a first core unit; 111. a first electrode; 111a, a first mounting groove; 111b, a first blind hole; 111c, first connection holes; 112. a second electrode; 112a, a second mounting groove; 112b, second blind holes; 112c, a second connection hole; 113. a resistor sheet; 114. a first insulating rod; 12. a second core unit; 13. a third core unit; 14. a discharge gap device; 141. a first discharge electrode; 142. a second discharge electrode; 143. a second insulating rod; 144. a first discharge section; 145. a second discharge section; 20. a connecting column; 30. and (5) mounting a column.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Fig. 1 is a schematic structural view of an embodiment of a lightning arrester core of the present application; fig. 2 is a schematic structural view of a lightning arrester core body in which two core units are connected.
Referring to fig. 1 and 2, the disclosed embodiment provides a lightning arrester core including a plurality of core units connected in sequence and having the same structure, each core unit including a first electrode 111, a second electrode 112, a resistive sheet 113, and a plurality of first insulating rods 114.
Specifically, the first electrode 111 and the second electrode 112 are respectively attached to two ends of the resistor 113 and are connected to the resistor 113, a first connection hole 111c is formed on a surface of the first electrode 111 facing away from the resistor 113, and a second connection hole 112c is formed on a surface of the second electrode 112 facing away from the resistor 113; a plurality of first insulating rods 114 are wound around the outer periphery of the resistor sheet 113, and both ends of the first insulating rods 114 are connected to the first electrode 111 and the second electrode 112, respectively; wherein adjacent core units are fixedly connected through connecting columns 20.
Here, it should be noted that the above-mentioned "first insulating rod 114" is mainly used to limit the resistor 113, and the resistor 113 may be further fixed, so that the resistor 113 is not displaced, thereby ensuring that the lightning arrester has a good current-passing capability. In addition, the "plural" mentioned above may be three or more, and the specific number of the settings is required according to the actual situation, for example: if three first insulating rods 114 are provided, the three first insulating rods 114 need to be distributed on the outer periphery of the resistor 113 in a triangular shape to achieve the effect of limiting the resistor 113, but are not limited thereto.
Illustratively, the epoxy fiberglass rod has good insulation properties due to its high mechanical strength. For this reason, in this embodiment, the first insulating rod 114 may be an epoxy glass fiber rod, and the bending resistance and torsion resistance of the lightning arrester may be effectively improved by using the epoxy glass fiber rod annularly arranged on the outer periphery of the resistor sheet 113.
In order to facilitate understanding of the assembly method of the lightning arrester core of the present application, the following embodiments will be described with reference to three core units connected in series, but are not limited thereto. The method comprises the following steps:
referring to fig. 1, the three-stage core units are the first core unit 11, the second core unit 12 and the third core unit 13, respectively, one end of the connecting post 20 is inserted into the second connecting hole 112c of the second electrode 112 in the first core unit 11, then the other end of the connecting post 20 is inserted into the first connecting hole 111c of the first electrode 111 in the second core unit 12, so that the first core unit 11 is fixedly connected with the second core unit 12, then one end of the connecting post 20 is inserted into the second connecting hole of the second electrode in the second core unit 12, and then the other end of the connecting post 20 is inserted into the first connecting hole of the first electrode in the third core unit 13, so that the third core unit 13 is fixedly connected with the second core unit 12, thereby completing the assembly of the three-stage core unit with simple structure and convenient installation.
In addition, the first connection hole 111c and the second connection hole 112c are screw holes, and correspondingly, the connection column 20 is a bolt, and the bolts are used for connecting the first connection hole 111c and the second connection hole 112c, so as to realize the fixed connection of the multi-stage core unit.
The lightning arrester core body based on the technical characteristics is formed by sequentially connecting the plurality of sections of core body units, each section of core body unit adopts the first electrode 111, the second electrode 112 and the resistor 113 arranged between the first electrode 111 and the second electrode 112, so that the resistor 113 can be installed in a segmented manner, and compared with the traditional mode of stacking and installing a plurality of resistor 113, the problem that the concentricity of the resistor 113 is easy to deviate in the installation process can be effectively reduced, the uniformity of stress of the resistor 113 is ensured, and the resistor 113 is prevented from being damaged by mechanical force; the resistor disc dislocation caused by process dispersion in the batch production process can be avoided, reliable electrical contact is formed between the resistor discs 113, side flashovers during operation are prevented, the discharge gap can isolate system voltage under a non-lightning stroke state, and long-term charged operation of the resistor discs is avoided. In addition, the lightning arrester core body 10 can be produced in sections and then combined during production, so that the process difficulty and the production cost are effectively reduced.
Fig. 3 is a schematic structural view of a first electrode in a lightning arrester core according to the present application; fig. 4 is a schematic view of the structure of the lightning arrester core at another angle; fig. 5 is a schematic structural view of a second electrode in a lightning arrester core according to the present application; fig. 6 is a schematic view of another angle of the second electrode in the arrester core of the present application.
Referring to fig. 3 and 5, in one embodiment, a first mounting groove 111a is provided at an end of the first electrode 111 facing the resistor sheet 113, a second mounting groove 112a is provided at an end of the second electrode 112 facing the resistor sheet 113, and both ends of the resistor sheet 113 are respectively engaged into the first mounting groove 111a and the second mounting groove 112 a. Wherein the diameters of the first and second mounting grooves 111a and 112a are equal to the diameter of the resistor sheet 113.
Illustratively, since the resistive sheets 113 disposed between the first electrode 111 and the second electrode 112 in each segment of the core unit are sequentially stacked, a specific number of the arrangements may be correspondingly arranged according to the total length of the arrester core 10 to be assembled, which is not limited.
Three resistor sheets provided between the first electrode 111 and the second electrode 112 are described below as an example.
Three resistor sheets are stacked in sequence, then the uppermost resistor sheet is clamped into the first mounting groove 111a, the lowermost resistor sheet is clamped into the second mounting groove 112a, concentricity between the resistor sheets 113 can be effectively guaranteed, meanwhile, when pressure is applied to electrodes at two ends, the resistor sheets 113 are uniformly stressed, damage to the resistor sheets 113 is avoided, and good through-flow capacity of the lightning arrester is further guaranteed.
Referring to fig. 3 and 5, in one embodiment, the first electrode 111 is provided with a plurality of first blind holes 111b along a first direction (refer to an X direction in fig. 3), and the plurality of first blind holes 111b are distributed on an outer circumference of the first mounting groove 111 a; the second electrode 112 is provided with a plurality of second blind holes 112b along the first direction (refer to the X direction in fig. 5), and the plurality of second blind holes 112b are distributed on the periphery of the second mounting groove 112 a; the two ends of the first insulating rod 114 are inserted into the first blind hole 111b and the second blind hole 112b, respectively, to be fixed.
Illustratively, a plurality of first blind holes 111b and second blind holes 112b are formed along the first direction in the first electrode 111 and the second electrode 112, and then two ends of the first insulating rod 114 are inserted into the first blind holes 111b and the second blind holes 112b respectively, so as to fix the first insulating rod 114, thereby realizing that the first insulating rod 114 is arranged on the periphery of the resistor sheet 113.
Fig. 7 is a schematic diagram of the connection of the core unit to the discharge gap device 14 in the arrester core 10 of the present application.
Referring to fig. 7, in one embodiment, the discharge gap assembly includes a first discharge electrode 141, a second discharge electrode 142, and a second insulation rod 143, the first discharge electrode 141 and the second discharge electrode 142 are respectively fixed at both ends of the second insulation rod 143, and the first discharge electrode 141 is connected to the second electrode 112 in the lowermost core unit; the outer side surface of the first discharge electrode 141 is connected with a first discharge segment 144, the outer side surface of the second discharge electrode 142 is connected with a second discharge segment 145, the second discharge segment 145 and the first discharge segment 144 are located at the same side, and a discharge gap 146 is formed between the second discharge segment 145 and the first discharge segment 144.
Illustratively, the diameter of the first discharge electrode is greater than the diameter of the second discharge electrode described above.
Illustratively, when the lightning arrester is struck by lightning, high voltage generated by the lightning acts on the first electrode 111 and causes the resistor 113 to be conducted, so that the high voltage generated by the lightning is transferred to the first discharge electrode 141, and since a discharge gap 146 is formed between the first discharge section 144 on the outer side surface of the first discharge electrode 141 and the second discharge section 145 of the second discharge electrode 142, the high voltage transferred to the first discharge electrode 141 is transferred to the second discharge electrode 142 through the discharge gap 146, and then the high voltage is conducted to the ground by the second discharge electrode 142, thereby limiting the voltage amplitude and effectively protecting the power line and the equipment insulation. When the high voltage generated by the lightning disappears, the resistive sheet 113 resumes the insulating state, so that the first electrode 111 and the electrode are in a non-conductive state, and the power line and the device resume normal operation. Since the discharge gap between the first discharge segment 144 and the second discharge segment 145 is insulated at the normal system voltage, the resistor sheet can be isolated from the system voltage, so that the resistor sheet can not run in a long-term charge, and the service life is prolonged. In addition, the second insulating rod 143 is not broken down by lightning in the process of conducting high voltage to the ground, and maintains an insulating state all the time.
In one embodiment, a third connection hole (not shown) is formed in a surface of the first discharge electrode 141 facing away from the second insulating rod 143, a mounting post 30 is inserted into the third connection hole, and the other end of the mounting post 30 is inserted into the second connection hole 112c in the lowermost core unit.
In one embodiment, the outer side surface of the first discharge electrode 141 is provided with a first threaded hole, and the end of the first discharge section 144 is provided with a first external thread matched with the first threaded hole; the outer side surface of the second discharge electrode 142 is provided with a second threaded hole, and the end part of the second discharge section 145 is provided with a second external thread matched with the second threaded hole.
Illustratively, the end of the first discharge segment 144 is inserted into the first threaded hole, and is screwed with the first threaded hole by using the first external thread, so as to fix the first discharge segment 144 on the first discharge electrode 141; likewise, the end of the second discharging section 145 extends into the second threaded hole, and is in threaded connection with the second threaded hole by using the second external thread, so that the second discharging section 145 is fixed on the second discharging electrode 142, the structure is simple, the installation is convenient, and the quick assembly and disassembly of the first discharging section 144 and the second discharging section 145 can be realized. In addition, in order to prevent the first and second discharge sections 144 and 145 from rotating at random, the first and second discharge sections 144 and 145 are locked by a lock nut.
The lightning arrester core body provided by the embodiment has the advantages of small production difficulty, convenience in overall assembly of the lightning arrester, good through-flow capacity and mechanical strength, strong impact-resistant high-current capacity and long operation life.
The application also provides a lightning arrester, and it includes lightning arrester core and overcoat among the above-mentioned embodiment mode of this application, and the inside of overcoat is located to the lightning arrester core.
According to the lightning arrester disclosed by the embodiment of the utility model, the technical effect of the lightning arrester core is consistent with that of the lightning arrester core, and the lightning arrester core is not described herein.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. The lightning arrester core is characterized by comprising a plurality of core units and discharge gap components, wherein the core units and the discharge gap components are sequentially connected and have the same structure;
the discharge gap assembly is connected with the core unit at the lowest section;
each core unit comprises a first electrode, a second electrode, a resistor disc and a plurality of first insulating rods;
the first electrode and the second electrode are respectively attached to two ends of the resistor disc and are connected with the resistor disc, a first connecting hole is formed in the surface, facing away from the resistor disc, of the first electrode, and a second connecting hole is formed in the surface, facing away from the resistor disc, of the second electrode;
the plurality of first insulating rods are wound on the periphery of the resistor disc, and two ends of each first insulating rod are respectively connected with the first electrode and the second electrode;
wherein, adjacent core units are fixedly connected through connecting columns.
2. The lightning arrester core according to claim 1, wherein a first mounting groove is formed in an end of the first electrode facing the resistor disc, a second mounting groove is formed in an end of the second electrode facing the resistor disc, and two ends of the resistor disc are respectively clamped into the first mounting groove and the second mounting groove.
3. The arrester core of claim 2 wherein the first and second mounting grooves have diameters equal to the diameter of the resistor sheet.
4. The lightning arrester core according to claim 2, wherein the first electrode is provided with a plurality of first blind holes along a first direction, the plurality of first blind holes being distributed on the outer periphery of the first mounting groove;
the second electrode is provided with a plurality of second blind holes along the first direction, and the second blind holes are distributed on the periphery of the second mounting groove;
the two ends of the first insulating rod are respectively inserted into the first blind hole and the second blind hole to be fixed.
5. The arrester core of claim 4 wherein the first insulating rod is an epoxy fiberglass rod.
6. The arrester core of claim 1 wherein the discharge gap assembly includes a first discharge electrode, a second discharge electrode, and a second insulating rod, the first discharge electrode and the second discharge electrode being secured to respective ends of the second insulating rod, and the first discharge electrode being connected to the second electrode in the lowermost section of the core unit;
the outer side face of the first discharge electrode is connected with a first discharge section, the outer side face of the second discharge electrode is connected with a second discharge section, the second discharge section and the first discharge section are located on the same side, and a discharge gap is formed between the second discharge section and the first discharge section.
7. The arrester core according to claim 6, wherein a third connection hole is provided on a surface of the first discharge electrode facing away from the second insulating rod, a mounting post is inserted into the third connection hole, and the other end of the mounting post is inserted into the second connection hole in the lowermost section of the core unit.
8. The lightning arrester core according to claim 6, wherein the outer side surface of the first discharge electrode is provided with a first threaded hole, and the end of the first discharge section is provided with a first external thread adapted to the first threaded hole;
the outer side face of the second discharge electrode is provided with a second threaded hole, and the end part of the second discharge section is provided with a second external thread matched with the second threaded hole.
9. The arrester core of claim 6 wherein the diameter of the first discharge electrode is greater than the diameter of the second discharge electrode.
10. A lightning arrester comprising an outer jacket and a lightning arrester core according to any of claims 1 to 9, the lightning arrester core being provided inside the outer jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321558660.2U CN220272237U (en) | 2023-06-16 | 2023-06-16 | Arrester core and arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321558660.2U CN220272237U (en) | 2023-06-16 | 2023-06-16 | Arrester core and arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220272237U true CN220272237U (en) | 2023-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321558660.2U Active CN220272237U (en) | 2023-06-16 | 2023-06-16 | Arrester core and arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220272237U (en) |
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2023
- 2023-06-16 CN CN202321558660.2U patent/CN220272237U/en active Active
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