CN218826942U

CN218826942U - Bidirectional lightning protection drop-out fuse

Info

Publication number: CN218826942U
Application number: CN202222939637.XU
Authority: CN
Inventors: 杨建栋; 李永辉
Original assignee: Baoding Tongli Electric Equipment Co ltd
Current assignee: Baoding Tongli Electric Equipment Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-04-07
Anticipated expiration: 2032-11-04

Abstract

The utility model relates to a fuse technical field has proposed two-way lightning protection type drop out fuse, including the insulator, both ends are fixed with last lead wire end piezo-resistor and lower lead wire end piezo-resistor respectively about the inner chamber of insulator, and the both ends of insulator are connected with upper end contact and lower extreme contact respectively, and upper end contact and lower extreme contact respectively with the both ends fixed connection of fusion tube, the lower extreme contact and the insulator of fusion tube tail end are articulated through the pivot, the upper end contact and the insulator of fusion tube correspond the end joint. Through the technical scheme, the piezoresistor at the upper lead end and the piezoresistor at the lower lead end are added at the insulator part, so that the fuse has an overvoltage protection function and a bidirectional lightning protection function; no matter the lightning stroke is formed at the high-voltage leading-in end or the low-voltage leading-in end, the lightning stroke can be smoothly led into the ground under the characteristic action of the bidirectional resistance card, and the high-voltage line or the load equipment is prevented from being damaged due to the lightning stroke overvoltage.

Description

Bidirectional lightning protection drop-out fuse

Technical Field

The utility model relates to a fuse technical field, it is specific, relate to two-way lightning protection type drop out fuse.

Background

When the drop-out fuse operates normally, the fuse tube forms a closed position after being tensioned by the fuse wire. When the system is in fault, the fuse wire is quickly fused by fault current to form electric arc, the arc extinguishing tube is burnt by the electric arc to decompose a large amount of gas, so that high pressure is formed in the tube, the arc is strongly blown along the pipeline in a longitudinal direction, and the electric arc is quickly elongated and extinguished. After the fuse is fused, the lower static contact loses tension and turns downwards, so that the tightening mechanism releases the fuse tube, and the fuse tube falls to form an obvious cut-off position. When a load needs to be pulled, the moving contact is pulled open by the insulating rod, the active contact and the static contact are still in contact at the moment, the insulating rod is continuously used for pulling the contacts, the auxiliary contacts are also separated, electric arcs are generated between the outlets, the electric arcs are elongated in the slits of the arc-extinguishing cover, meanwhile, the arc-extinguishing cover generates gas, and when the current crosses zero, the electric arcs are extinguished;

the drop-out fuse is suitable for power system with frequency of 50HZ and rated voltage of 35KV and below, and is installed on high-voltage side of distribution transformer or main line of distribution. The main function is the place with low requirement on the protection performance, and the device can be used in combination with an isolating switch to replace an automatic air switch; the circuit breaker can also be matched with a load switch for use to replace a high-price circuit breaker. Meanwhile, the device also has short-circuit protection, overload and isolation circuits;

the existing drop-out fuse is installed outdoors in the actual use process, so that the risk of being struck by lightning exists, the lightning protection performance of the existing drop-out fuse is general, and the condition that a high-voltage line and load equipment are damaged easily occurs when the lightning is struck by overvoltage;

therefore, we propose a bidirectional lightning protection type drop-out fuse

SUMMERY OF THE UTILITY MODEL

The utility model provides a two-way lightning protection type drop out fuse has solved the two-way lightning protection type drop out fuse problem among the correlation technique.

The technical scheme of the utility model as follows:

the bidirectional lightning protection type drop-out fuse comprises an insulator, wherein an upper lead end piezoresistor and a lower lead end piezoresistor are respectively fixed at the upper end and the lower end of an inner cavity of the insulator;

the two ends of the insulator are respectively connected with the upper end contact and the lower end contact, the upper end contact and the lower end contact are respectively and fixedly connected with the two ends of the fusion tube, the lower end contact at the tail end of the fusion tube is hinged with the insulator through a rotating shaft, and the upper end contact of the fusion tube is clamped with the corresponding end of the insulator;

specifically, an upper lead end piezoresistor and a lower lead end piezoresistor are added at the insulator part, so that the insulator has an overvoltage protection function, and the fuse has a bidirectional lightning protection function; no matter the lightning stroke is formed at the high-voltage leading-in end or the low-voltage leading-in end, the lightning stroke can be smoothly led into the ground under the characteristic action of the bidirectional resistance card, and the high-voltage line or the load equipment is prevented from being damaged due to the lightning stroke overvoltage.

And the middle part of the outer wall of the insulator is fixedly connected with a grounding wire frame with a protection mechanism.

Preferably, the number of the through holes and the through holes formed in the surface of the grounding wire frame is two, a first bolt penetrates through the side wall of the grounding wire frame corresponding to the through hole, the first bolt penetrates through the through hole and is rotatably connected with a resisting and tightening plate, a housing is sleeved on the outer wall of the grounding wire frame, limiting rods are fixed on two sides of one end face of the housing, the limiting rods penetrate through the limiting blocks and are fixed on the outer wall of the grounding wire frame, and second bolts are inserted into the outer wall of the limiting blocks in a threaded mode perpendicular to the limiting rods.

Specifically, the first bolt can drive the abutting plate to abut against the ground wire for tight connection, so that the connection stability is improved, and the housing is moved to the joint of the ground wire and the ground wire frame, so that the housing can be protected when being wrapped.

Preferably, the outer wall of the limiting rod is provided with a limiting hole, and the second bolt penetrates through the surface of the limiting block and is inserted into the limiting hole.

Specifically, utilize the second bolt can carry out spacing firm to the gag lever post to avoid the housing to slide.

Preferably, the outer end of the limiting rod is fixed with an end plate.

Specifically, the setting of end plate can be further spacing to the gag lever post, avoids appearing the condition of slippage when not supporting tightly.

Preferably, the outer wall of the fusion tube is sleeved with an adaptive ultraviolet-proof sleeve.

Specifically, the protection effect on the fusion tube can be realized to a certain extent, and the service life is prolonged.

Preferably, a manual operation ring is fixed at one end of the fusion tube close to the upper end contact.

Specifically, the fusion tube is convenient for a worker to hang and connect with the manual operation ring by means of a tool and then pull the fusion tube.

Preferably, the outer wall of the abutting plate is provided with anti-skid grains.

Specifically, the anti-slip lines are arranged, so that the grounding wire can be tightly abutted, and the connection stability is improved.

Preferably, an upper wiring terminal and a lower wiring terminal are respectively fixed at two ends of the insulator.

Specifically, the upper terminal and the lower terminal are used for connecting with corresponding lines.

The utility model discloses a theory of operation and beneficial effect do:

1. in the utility model, the voltage-sensitive ceramic resistor is added at the supporting insulator part to ensure that the supporting insulator has the overvoltage protection function, and the fuse has the bidirectional lightning protection function; no matter the lightning stroke is formed at the high-voltage leading-in end or the low-voltage leading-in end, the lightning stroke can be smoothly led into the ground under the characteristic action of the bidirectional resistance card, and the high-voltage line or the load equipment is prevented from being damaged due to the lightning stroke overvoltage.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the grounding wire rack of the present invention;

FIG. 3 is a schematic view of the structure of the stop lever of the present invention;

fig. 4 is a schematic view of the fusion tube structure of the present invention.

In the figure: 1. an insulator; 2. an upper lead end varistor; 3. a piezoresistor at the lower lead end; 4. a lower connecting terminal; 5. an upper terminal; 6. a fusion tube; 7. an upper end contact; 8. a lower end contact; 9. a ground wire frame; 10. a through hole; 11. a first bolt; 12. a propping plate; 13. a housing; 14. a limiting rod; 15. a limiting block; 16. a second bolt; 17. an end plate; 18. a limiting hole; 19. an ultraviolet-proof sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work, are related to the scope of the present invention.

Example 1

As shown in fig. 1, the present embodiment provides a bidirectional lightning protection drop-out fuse, which includes an insulator 1, an upper lead end varistor 2 and a lower lead end varistor 3 are respectively fixed at two ends of an inner cavity of the insulator 1, two ends of the insulator 1 are respectively connected to an upper end contact 7 and a lower end contact 8, and the upper end contact 7 and the lower end contact 8 are respectively fixedly connected to two ends of a fuse tube 6;

an upper lead end piezoresistor 2 and a lower lead end piezoresistor 3 are added at the position of an insulator 1, so that the insulator has an overvoltage protection function, and the fuse has a bidirectional lightning protection function; no matter the lightning stroke is formed at the high-voltage leading-in end or the low-voltage leading-in end, the lightning stroke can be smoothly led into the ground under the characteristic action of the bidirectional resistance card, so that the high-voltage line or load equipment is prevented from being damaged due to lightning stroke overvoltage;

in this embodiment, a grounding wire frame 9 is fixed in the middle of the outer wall of the insulator 1, and the grounding wire frame 9 is arranged to be conveniently connected with a grounding wire, so that current generated by lightning strike can be introduced into the ground.

In this embodiment, the two ends of the insulator 1 are respectively fixed with an upper wiring terminal 5 and a lower wiring terminal 4, and the upper wiring terminal 5 and the lower wiring terminal 4 are respectively used for being connected with corresponding lines.

In this embodiment, the lower end contact 8 at the tail end of the fusion tube 6 is hinged to the insulator through the rotating shaft, and the upper end contact 7 of the fusion tube 6 is clamped with the corresponding end of the insulator 1, so that manual disconnection is conveniently performed.

In this embodiment, the end of the fusion tube 6 close to the upper end contact 7 is fixed with a manual operation ring, so that the worker can conveniently hang the fusion tube 6 by means of a tool and the manual operation ring and pull the fusion tube.

In this embodiment, the outer wall cover of fusion tube 6 is equipped with the ultraviolet protection sleeve pipe 19 of adaptation to can form the protection of removal to fusion tube 6, prolonged fusion tube 6 in open air life.

Example 2

As shown in fig. 3 to 4, based on the same concept as that of embodiment 1, the present embodiment further provides a ground wire frame 9 with a protection mechanism, the surface of the ground wire frame 9 is provided with two through holes 10, a first bolt 11 is threaded through a position of the side wall of the ground wire frame 9 corresponding to the through hole 10, the first bolt 11 penetrates through the through hole 10 and is rotatably connected with a fastening plate 12, a ground wire penetrates through the through hole 10, and then the first bolt 11 is rotated to drive the fastening plate 12 to fasten the ground wire, so that the connection stability is improved, and the outer wall of the fastening plate 12 is provided with anti-slip threads, so that the point stability is further improved;

in this embodiment, an adaptive housing 13 is sleeved on the outer wall of the ground wire frame 9, two sides of one end surface of the housing 13 are both fixed with a limiting rod 14, the limiting rod 14 movably penetrates through a limiting block 15, a second bolt 16 penetrates through a bolt on the outer wall of the limiting block 15, a limiting hole 18 is formed in the surface of the limiting rod 14, and the second bolt 16 is inserted into the limiting hole 18 for limiting;

the cover shell 13 is moved to the joint of the grounding wire and the grounding wire frame 9, so that the cover shell can be protected when being wrapped, the situation that the joint falls off due to invasion of external factors is avoided, and the connection safety is ensured;

in this embodiment, the limiting block 15 is fixed on the outer wall of the ground wire frame 9, and the outer end of the limiting rod 14 is fixed with the end plate 17, so that the slipping of the limiting rod 14 and the housing 13 is effectively avoided.

The embodiment provides a specific implementation principle of the bidirectional lightning protection type drop-out fuse, which is as follows: an upper lead end piezoresistor 2 and a lower lead end piezoresistor 3 are added at the position of the insulator 1, so that the insulator has an overvoltage protection function and the fuse has a bidirectional lightning protection function; no matter the thunderbolt is formed at the high-voltage leading-in end or the low-voltage leading-in end, can both introduce the ground smoothly by the characteristic effect of two-way resistance card, prevent causing high-voltage line or load equipment to cause the damage because of the thunderbolt overvoltage, when earth connection and ground wire frame 9 are connected in addition, pass through hole 10 with the earth connection, then rotatory first bolt 11, can drive and support tight board 12 and support tight connection to the earth connection, thereby the degree of stability of connection has been promoted, through removing housing 13 to earth connection and ground wire frame 9 junction, thereby can form the protection when wrapping up it, avoid receiving the invasion and attack of external factors and cause the condition that the junction drops to take place, the security of connection has been guaranteed, then peg graft in spacing hole 18 through rotatory second bolt 16 and carry on spacingly, thereby the stability of housing 13 has been guaranteed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The bidirectional lightning protection type drop-out fuse is characterized by comprising an insulator (1), wherein an upper lead end piezoresistor (2) and a lower lead end piezoresistor (3) are respectively fixed at the upper end and the lower end of an inner cavity of the insulator (1);

the two ends of the insulator (1) are respectively connected with an upper end contact (7) and a lower end contact (8), the upper end contact (7) and the lower end contact (8) are respectively fixedly connected with the two ends of the fusion tube (6), the lower end contact (8) at the tail end of the fusion tube (6) is hinged with the insulator (1) through a rotating shaft, and the upper end contact (7) of the fusion tube (6) is clamped with the corresponding end of the insulator (1);

and a grounding wire frame (9) with a protection mechanism is fixedly connected to the middle of the outer wall of the insulator (1).

2. The bidirectional lightning protection drop-out fuse according to claim 1, wherein the surface of the ground line frame (9) is provided with two through holes (10), the number of the through holes (10) is two, a first bolt (11) is threaded through the side wall of the ground line frame (9) corresponding to the through hole (10), the first bolt (11) is threaded through the through hole (10) and is rotatably connected with the tightening plate (12), the outer wall of the ground line frame (9) is sleeved with a housing (13), both sides of one end surface of the housing (13) are fixed with limit rods (14), the limit rods (14) are threaded through the limit blocks (15) and the limit blocks (15) are fixed on the outer wall of the ground line frame (9), and the outer wall of the limit blocks (15) is perpendicular to the threads of the limit rods (14) and is inserted with second bolts (16).

3. The bidirectional lightning protection drop-out fuse according to claim 2, wherein the outer wall of the limiting rod (14) is provided with a limiting hole (18), and the second bolt (16) penetrates through the surface of the limiting block (15) and is inserted into the limiting hole (18).

4. A bidirectional lightning protection drop-out fuse according to claim 2, characterized in that an end plate (17) is fixed to the outer end of the limit rod (14).

5. The bidirectional lightning protection drop-out fuse according to claim 1, characterized in that the outer wall of the fusion tube (6) is sleeved with an adaptive ultraviolet-proof sleeve (19).

6. A bidirectional lightning protection drop-out fuse according to claim 1, characterized in that a manual operating ring is fixed to one end of the fuse tube (6) close to the upper end contact (7).

7. The bidirectional lightning protection drop-out fuse according to claim 2, wherein the outer wall of the tightening plate (12) is provided with anti-slip lines.

8. A bidirectional lightning protection drop-out fuse according to claim 1, characterised in that the insulator (1) is fixed at its two ends with an upper terminal (5) and a lower terminal (4), respectively.