CN211294774U - Effective explosion-proof plug-in type metal oxide arrester - Google Patents
Effective explosion-proof plug-in type metal oxide arrester Download PDFInfo
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- CN211294774U CN211294774U CN202020311421.7U CN202020311421U CN211294774U CN 211294774 U CN211294774 U CN 211294774U CN 202020311421 U CN202020311421 U CN 202020311421U CN 211294774 U CN211294774 U CN 211294774U
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Abstract
An effective explosion-proof plug-in metal oxide arrester comprises an arrester shell and an arrester core; the lightning arrester core body comprises an upper metal electrode, a lower metal electrode and at least two runway-shaped insulating fixing rings, a plurality of metal oxide resistance sheets are stacked in series to form a cylindrical resistance sheet cylinder body, the cylindrical resistance sheet cylinder body is arranged between the upper metal electrode and the lower metal electrode, the upper end of the cylindrical resistance sheet cylinder body is abutted to the inner bottom surface of the upper metal electrode through a jackscrew, the two runway-shaped insulating fixing rings are respectively sleeved on the upper metal electrode and the lower metal electrode at a preset distance, the runway-shaped insulating fixing rings are tensioned through the jackscrew positioned on the lower metal electrode, the cylindrical resistance sheet cylinder body is clamped by the runway-shaped insulating fixing rings to form a lightning arrester core body assembly, and an insulating composite outer sleeve is arranged on the outer wall of the lightning arrester core body assembly; an air body gap is arranged between the outer wall of the insulating composite outer sleeve and the shell of the lightning arrester, and a plurality of pressure relief holes communicated with the air body gap are arranged on the shell of the lightning arrester. The utility model has the advantages of firm structure and good explosion-proof performance.
Description
Technical Field
The utility model relates to a metal oxide arrester, especially an effective explosion-proof plug-in metal oxide arrester.
Background
The metal oxide arrester is an important overvoltage protection device in a power system, and when the metal oxide arrester runs on site, faults such as wetting, aging and the like can occur, even the metal oxide arrester can explode when the metal oxide arrester runs seriously, and the normal operation of the power system is threatened seriously.
In order to ensure that the inner core element, namely the nonlinear metal oxide resistor disc, can still keep good electrical contact when the plug-in metal oxide arrester is subjected to external force, in the prior art, various manufacturers adopt different structures such as a winding type structure, a cage type structure and the like to design and manufacture the plug-in metal oxide arrester.
However, in the actual use process of the product, the plug-in metal oxide arrester manufactured by adopting the winding type structure, the cage type structure and the like still has the problem of generating comminuted explosion when the fault occurs, and the arrester fragments generated by the comminuted explosion can cause serious damage to other surrounding electrical equipment and seriously affect the normal operation of the power system.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the utility model provides an explosion-proof plug-in metal oxide arrester with firm structure and good explosion-proof performance for the society.
The technical scheme of the utility model is that: the explosion-proof pluggable metal oxide arrester comprises an arrester shell and an arrester core body positioned in the arrester shell; the lightning arrester core body comprises an upper metal electrode, a lower metal electrode and at least two runway-shaped insulating fixing rings, a plurality of metal oxide resistance sheets are stacked in series to form a cylindrical resistance sheet cylinder, the cylindrical resistance sheet cylinder is arranged between the upper metal electrode and the lower metal electrode, the upper end of the cylindrical resistance sheet cylinder is abutted against the inner bottom surface of the upper metal electrode through a jackscrew, the two runway-shaped insulating fixing rings are respectively sleeved on the upper metal electrode and the lower metal electrode at a preset distance, and are tensioned through a grounding screw rod positioned on the lower metal electrode, so that the runway-shaped insulating fixing rings clamp the cylindrical resistance sheet cylinder to form a lightning arrester core body assembly, and an insulating composite outer sleeve is arranged on the outer wall of the lightning arrester core body assembly; an air body gap is arranged between the outer wall of the insulating composite outer sleeve and the shell of the lightning arrester, and a plurality of pressure relief holes communicated with the air body gap are formed in the shell of the lightning arrester.
As an improvement to the present invention, a first conductive elastic element is provided between the adjacent metal oxide resistance cards.
As an improvement to the present invention, the first conductive elastic member is a circular gasket made of an aluminum alloy.
As an improvement, the central part of the circular gasket is provided with a plurality of concentric circular raised bars.
As an improvement, a metal cushion block is arranged between the bottommost metal oxide resistance card and the jackscrew.
As an improvement of the present invention, a second conductive elastic element is provided between the metal pad and the lowermost metal oxide resistor sheet.
As an improvement of the utility model, the runway-shaped insulating fixing ring is made of epoxy glass fiber.
As right the utility model discloses an it is right as the improvement, arrester core body upper end be with regulation awl seat complex awl head arrester core body lower part is equipped with spring mechanism, and spring mechanism will the awl head top of arrester core body leans on in the awl seat.
As an improvement of the utility model, the upper metal electrode and/or the lower metal electrode are made of aluminum alloy or steel.
As a right improvement of the utility model, the upper metal electrode and the lower metal electrode are respectively provided with a U-shaped groove for nesting the runway-shaped insulating fixing ring.
The utility model discloses owing to adopted a plurality of metal oxide resistance card to establish ties and pile up and form cylinder resistance card cylinder, the cylinder resistance card cylinder is established between metal electrode and lower metal electrode, and will the upper end of cylinder resistance card cylinder top by on the interior bottom surface of metal electrode goes up, two runway shape insulation fixed ring separates the predetermined distance and overlaps respectively to hang on metal electrode and the lower metal electrode, and will runway shape insulation fixed ring tight structure that rises through the ground screw that is located the lower metal electrode, makes the utility model has the advantage of sound construction; because the utility model adopts the air body gap between the outer wall of the insulating composite outer sleeve and the lightning arrester shell, and the lightning arrester shell is provided with a plurality of pressure relief holes communicated with the air body gap, when the utility model breaks down, the generated high-pressure gas is effectively relieved by the air body gap between the lightning arrester shell and the core body; the pressure is released through the pressure relief hole formed in the arrester shell, and through tests, even if the fault is serious, the arrester shell can only be torn, the problem that other peripheral electrical equipment is damaged by spraying of crushing fragments can not be caused, the defect of crushing explosion when the plug-in type arrester breaks down can be effectively avoided, and the practical effect of effective explosion prevention is achieved.
Drawings
Fig. 1 is a schematic view of a partial cross-section structure according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of main components in fig. 1.
Fig. 3 is a schematic view of the structure of fig. 2 from another perspective.
Fig. 4 is a schematic structural view of the racetrack-shaped insulating fixing ring in fig. 2.
Fig. 5 is another view angle structure diagram of fig. 4.
Fig. 6 is a schematic view of the conductive elastic member of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, fig. 1 to 5 disclose an explosion-proof plug-in metal oxide arrester, which includes an arrester housing 1 and an arrester core 2 located in the arrester housing 1; the lightning arrester core body 2 comprises an upper metal electrode 21, a lower metal electrode 22 and at least two runway-shaped insulating fixing rings 23, wherein a plurality of metal oxide resistance sheets 24 are stacked in series to form a cylindrical resistance sheet cylinder, the cylindrical resistance sheet cylinder is arranged between the upper metal electrode 21 and the lower metal electrode 22, the upper end of the cylindrical resistance sheet cylinder is abutted against the inner bottom surface of the upper metal electrode 21 through a jackscrew 25, the two runway-shaped insulating fixing rings 23 are respectively sleeved on the upper metal electrode 21 and the lower metal electrode 22 at a preset distance, the runway-shaped insulating fixing rings 23 are tensioned through grounding screws 26 positioned on the lower metal electrode 22, the cylindrical resistance sheet cylinder is clamped by the runway-shaped insulating fixing rings 23 to form a lightning arrester core body assembly, an insulating composite outer sleeve 27 is arranged on the outer wall of the lightning arrester core body assembly, the utility model has the advantage of firm structure; the outer wall of insulating composite coat 27 with be equipped with air body clearance 11 between the arrester shell 1 be equipped with on the arrester shell 1 a plurality of with the communicating pressure release hole 12 in air body clearance 11 makes the utility model has the advantages of it is explosion-proof.
In order to adjust the suitability of the stacking length of the metal oxide resistance cards 24, a metal spacer 242 may be arranged between the lowermost metal oxide resistance card 24 and the jackscrew 25.
Preferably, a second conductive elastic element 243 is preferably provided between the metal pad 242 and the lowermost metal oxide resistor sheet 24. The structure of the second conductive elastic element 243 is identical to that of the first conductive elastic element 241, and the specific structure is explained with reference to fig. 6.
Preferably, the racetrack-shaped insulating fixing ring 23 can be made of glass fiber reinforced plastics for enhancing the insulating property.
Preferably, the upper end of the arrester core body 2 is a conical head, the inner part of the upper end of the arrester shell 1 is an inner conical head matched with the conical head, a spring mechanism 3 is arranged at the lower part of the arrester core body 2, and the conical head of the arrester core body 2 of the spring mechanism 3 abuts against the inner conical head.
Preferably, the upper metal electrode 21 and/or the lower metal electrode 22 are made of aluminum alloy or steel.
Preferably, the upper metal electrode 21 and the lower metal electrode 22 are respectively provided with a U-shaped groove for nesting the racetrack-shaped insulating fixing ring 23.
Referring to fig. 6, in order to improve the electrical contact between the metal oxide resistance cards 24 and prevent the silicone rubber, liquid silicone rubber or ethylene propylene diene monomer rubber adopted when the insulating composite outer casing 27 is made from permeating into the metal oxide resistance cards 24 during the injection and vulcanization processes, a first conductive elastic element 241 is arranged between the adjacent metal oxide resistance cards 24. The first conductive elastic member 241 may be a circular spacer made of an aluminum alloy. Preferably, a plurality of concentric circular protruding strips 2411 are provided at the center of the circular gasket to enhance electrical connection.
During the production process, when the metal oxide resistor disc 24 is placed and tightly pressed by the jackscrew 25, care must be taken to ensure that the metal oxide resistor disc 24 is centered and that the outer side of the illustrated metal oxide resistor disc 24 is spaced from the racetrack-shaped insulating fixing ring 23.
When in use, the utility model can be connected with other objects through the flange plate 4.
All equivalent changes made by the contents of the specification and the drawings of the utility model are included in the scope of the claims of the utility model without departing from the idea of the utility model.
Claims (10)
1. An effective explosion-proof plug-in metal oxide arrester comprises an arrester shell (1) and an arrester core body (2) positioned in the arrester shell (1); the method is characterized in that: the lightning arrester core body (2) comprises an upper metal electrode (21), a lower metal electrode (22) and at least two runway-shaped insulating fixing rings (23), a plurality of metal oxide resistance cards (24) are stacked in series to form a cylindrical resistance card cylinder, the cylindrical resistance card cylinder is arranged between the upper metal electrode (21) and the lower metal electrode (22), the upper end of the cylindrical resistance card cylinder is abutted against the inner bottom surface of the upper metal electrode (21) through a jackscrew (25), the two runway-shaped insulating fixing rings (23) are respectively sleeved on the upper metal electrode (21) and the lower metal electrode (22) at a preset distance, and the runway-shaped insulating fixing rings (23) are tightened through a grounding screw (26) positioned on the lower metal electrode (22) to arrest lightning so that the runway-shaped insulating fixing rings (23) clamp the cylindrical resistance card cylinder to form a core body assembly, an insulating composite outer sleeve (27) is arranged on the outer wall of the lightning arrester core body component; an air body gap (11) is arranged between the outer wall of the insulating composite outer sleeve (27) and the lightning arrester shell (1), and a plurality of pressure relief holes (12) communicated with the air body gap (11) are formed in the lightning arrester shell (1).
2. An effective explosion-proof pluggable metal oxide arrester as defined in claim 1, wherein: a first conductive elastic element (241) is arranged between the adjacent metal oxide resistor discs (24).
3. An effective explosion-proof pluggable metal oxide arrester as defined in claim 2, wherein: the first conductive elastic element (241) is a circular gasket made of an aluminum alloy.
4. An effective explosion-proof pluggable metal oxide arrester as claimed in claim 3, wherein: a plurality of concentric circular convex strips (2411) are arranged at the center of the circular gasket.
5. An effective explosion-proof pluggable metal oxide arrester as recited in any one of claims 1 to 4, characterized in that: and a metal cushion block (242) is arranged between the lowermost metal oxide resistor disc (24) and the jackscrew (25).
6. An effective explosion-proof pluggable metal oxide arrester as recited in claim 5, wherein: a second conductive elastic element (243) is arranged on the metal cushion block (242) and the metal oxide resistor disc (24) at the lowest part.
7. An effective explosion-proof pluggable metal oxide arrester as recited in any one of claims 1 to 4, characterized in that: the runway-shaped insulating fixing ring (23) is made of epoxy glass fiber.
8. An effective explosion-proof pluggable metal oxide arrester as recited in any one of claims 1 to 4, characterized in that: the lightning arrester is characterized in that the upper end of the lightning arrester core body (2) is provided with a conical head matched with a conical seat, the lower part of the lightning arrester core body (2) is provided with a spring mechanism (3), and the spring mechanism (3) enables the conical head of the lightning arrester core body (2) to be abutted against the conical seat.
9. An effective explosion-proof pluggable metal oxide arrester as recited in any one of claims 1 to 4, characterized in that: the upper metal electrode (21) and/or the lower metal electrode (22) are made of aluminum alloy or steel.
10. An effective explosion-proof pluggable metal oxide arrester as claimed in claim 9, wherein: u-shaped grooves for nesting the runway-shaped insulating fixing rings (23) are respectively arranged on the upper metal electrode (21) and the lower metal electrode (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020311421.7U CN211294774U (en) | 2020-03-13 | 2020-03-13 | Effective explosion-proof plug-in type metal oxide arrester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020311421.7U CN211294774U (en) | 2020-03-13 | 2020-03-13 | Effective explosion-proof plug-in type metal oxide arrester |
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| CN211294774U true CN211294774U (en) | 2020-08-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113744943A (en) * | 2021-09-02 | 2021-12-03 | 厦门Abb避雷器有限公司 | Core body structure of composite outer sleeve lightning arrester and composite outer sleeve lightning arrester |
| CN113820554A (en) * | 2021-08-24 | 2021-12-21 | 华明川 | Method for weakening electrodynamic destructive power and improving large current impact resistance of lightning arrester |
| CN114334325A (en) * | 2021-12-24 | 2022-04-12 | 宁波市镇海国创高压电器有限公司 | Lightning arrester with pressure relief device |
-
2020
- 2020-03-13 CN CN202020311421.7U patent/CN211294774U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820554A (en) * | 2021-08-24 | 2021-12-21 | 华明川 | Method for weakening electrodynamic destructive power and improving large current impact resistance of lightning arrester |
| CN113744943A (en) * | 2021-09-02 | 2021-12-03 | 厦门Abb避雷器有限公司 | Core body structure of composite outer sleeve lightning arrester and composite outer sleeve lightning arrester |
| CN113744943B (en) * | 2021-09-02 | 2023-01-24 | 厦门Abb避雷器有限公司 | Core body structure of composite outer sleeve lightning arrester and composite outer sleeve lightning arrester |
| CN114334325A (en) * | 2021-12-24 | 2022-04-12 | 宁波市镇海国创高压电器有限公司 | Lightning arrester with pressure relief device |
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