CN220172058U

CN220172058U - Outdoor high-voltage drop-out fuse

Info

Publication number: CN220172058U
Application number: CN202321544835.4U
Authority: CN
Inventors: 匡江华; 匡文敏; 吴明晓
Original assignee: Jiangxi Leierdunwei Electric Co ltd
Current assignee: Jiangxi Leierdunwei Electric Co ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2023-12-12
Anticipated expiration: 2033-06-16

Abstract

The utility model discloses an outdoor high-voltage drop-out fuse, which relates to the technical field of fuses and comprises an insulator, wherein a fixed support is arranged at the bottom of the insulator, a groove is formed in the inner side of the fixed support, the fuse is arranged at the top of the fixed support, a blocking structure is arranged in the fixed support, and a wiring terminal is arranged at the top and the bottom of the insulator respectively. According to the utility model, the blocking structure is arranged, when the fuse tube needs to be taken down from the high-voltage fuse, the L-shaped rod on the outer wall of the insulating rod is firstly put into the pull ring, then one end of the insulating rod is put into the inner side of the circular ring, the insulating rod is controlled to pull the circular ring downwards, the connecting rod is driven to move downwards, so that the movable rod drives the blocking block to move in the movable groove, the blocking state of the blocking block on the rotating shaft is relieved, and the connecting spring is compressed; under the action of gravity, the fuse tube slides down and is hung on the insulating rod through the pull ring, so that the broken fuse can be taken out rapidly.

Description

Outdoor high-voltage drop-out fuse

Technical Field

The utility model relates to the technical field of fuses, in particular to an outdoor high-voltage drop-out fuse.

Background

Drop-out fuses are one of the most commonly used types of short-circuit protection switches for 10kV distribution line branch lines and distribution transformers. The drop-out fuse is arranged on a branch line of a 10kV distribution line, so that the power failure range can be reduced, and the drop-out fuse has an obvious disconnection point, has the function of an isolating switch, and creates a safe operation environment for the line and equipment of an overhaul section; the device is arranged on a distribution transformer, can be used as a main protection of the distribution transformer, has the characteristics of economy, convenient operation, strong outdoor environment adaptability and the like, is widely applied to the primary side of a 10kV distribution line and the distribution transformer as protection and equipment switching operation, and is popularized.

The existing outdoor high-voltage drop-out fuse breaks away from the fuse tube after faults occur, the fuse tube is hung on the fixed support under the action of gravity, the fuse tube is required to be taken down through the insulating rod by manual operation at the moment, the insulating rod is long in length and can cause arm ache of staff due to long-time operation, and the longer the insulating rod works, the greater the threat that the safety of the staff receives is, so that the efficiency of fuse taking down is improved, the operation time of the insulating rod is reduced, and the outdoor high-voltage drop-out fuse is provided.

Disclosure of Invention

The utility model aims at: in order to achieve the purpose of quick removal of the fuse tube, the outdoor high-voltage drop-out fuse is provided.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the outdoor high-voltage drop-out fuse comprises an insulator, wherein a fixed support is arranged at the bottom of the insulator, a groove is formed in the inner side of the fixed support, a fuse is arranged at the top of the fixed support, the fuse comprises a rotating shaft, a blocking structure is arranged in the fixed support, and the blocking structure is used for limiting the rotating shaft;

the blocking structure comprises a circular ring, a connecting rod, a movable rod, a blocking block, a connecting spring and a movable groove;

the circular ring is arranged at the bottom of the fixed support, the connecting rod is fixedly arranged at the top of the circular ring, and the movable rod is fixedly arranged at the top end of the connecting rod and penetrates through the inside of the fixed support;

the blocking block is fixedly arranged at the top end of the movable rod and is attached to the side face of the rotating shaft, and the blocking block is used for blocking the fuse tube.

As still further aspects of the utility model: the fuse comprises an insulator, and is characterized in that a spring plate is arranged at the top of the insulator, the fuse further comprises a fuse tube, a lower moving contact, an upper end contact and a pull ring, wherein the inner sides of the spring plate and a fixed support are respectively provided with a fixed contact, the lower moving contact and the upper end contact are respectively contacted with the fixed contacts, and a fuse is arranged in the fuse tube;

the pull ring is fixedly arranged on the outer wall of the fuse tube and is used for pulling the fuse tube to be separated from the fixing support.

As still further aspects of the utility model: the movable groove is arranged in the fixed support, the movable groove is used for providing a moving space for the blocking block, the connecting spring is arranged in the movable groove and sleeved outside the movable rod, and one end of the connecting spring is fixedly connected to the bottom of the blocking block and the other end of the connecting spring is fixedly connected to the fixed support.

As still further aspects of the utility model: the top and the bottom of insulator respectively are provided with a binding post, binding post is used for the intercommunication electric current, the outer wall of insulator is provided with the installing support, the installing support is used for the insulator to be connected with external mounting support.

As still further aspects of the utility model: the spring plate is internally provided with a bump, the upper contact is limited and fixed by the bump, and the fixed contact and the spring plate are elastic.

As still further aspects of the utility model: the elastic force of the connecting spring is larger than the sum of the weights of the circular ring and the connecting rod.

As still further aspects of the utility model: one end of the blocking block, which is far away from the insulator, is formed with an arc.

Compared with the prior art, the utility model has the beneficial effects that:

through setting up the blocking structure, when the fuse tube needs to be taken down from the high-voltage fuse, the L-shaped rod on the outer wall of the insulating rod is put into the pull ring firstly, then one end of the insulating rod is put into the inner side of the circular ring, the insulating rod is controlled to pull the circular ring downwards, and the connecting rod is driven to move downwards, so that the movable rod drives the blocking block to move in the movable groove, the blocking state of the blocking block on the rotating shaft is relieved, and the connecting spring is compressed at the moment; under the action of gravity, the fuse tube slides down and is hung on the insulating rod through the pull ring, so that the broken fuse can be taken out rapidly.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2A in accordance with the present utility model;

FIG. 4 is a schematic view of another view of the present utility model;

FIG. 5 is an enlarged schematic view of the present utility model at B in FIG. 4;

fig. 6 is a schematic view of the fuse tube of the present utility model in its installed configuration.

In the figure: 1. an insulator; 2. a mounting bracket; 3. a stationary contact; 4. a spring plate; 5. a fuse; 501. a fuse tube; 502. a lower moving contact; 503. an upper contact; 504. a rotating shaft; 505. a pull ring; 6. a fixed bracket; 7. a blocking structure; 701. a circular ring; 702. a connecting rod; 703. a movable rod; 704. a blocking piece; 705. a connecting spring; 706. a movable groove; 8. and a connection terminal.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 6, in an embodiment of the present utility model, an outdoor high voltage drop-out fuse includes an insulator 1, a fixed bracket 6 is installed at the bottom of the insulator 1, a groove is formed on the inner side of the fixed bracket 6, a fuse 5 is disposed at the top of the fixed bracket 6, the fuse 5 includes a rotating shaft 504, a blocking structure 7 is disposed inside the fixed bracket 6, and the blocking structure 7 is used for limiting the rotating shaft 504;

the blocking structure 7 comprises a circular ring 701, a connecting rod 702, a movable rod 703, a blocking block 704, a connecting spring 705 and a movable groove 706;

the circular ring 701 is arranged at the bottom of the fixed bracket 6, the connecting rod 702 is fixedly arranged at the top of the circular ring 701, and the movable rod 703 is fixedly arranged at the top end of the connecting rod 702 and penetrates into the fixed bracket 6;

the blocking block 704 is fixedly installed at the top end of the movable rod 703 and is attached to the side surface of the rotating shaft 504, and the blocking block 704 is used for blocking the fuse tube 501.

The top of the insulator 1 is provided with a spring plate 4, the fuse 5 further comprises a fuse tube 501, a lower moving contact 502, an upper contact 503 and a pull ring 505, the inner sides of the spring plate 4 and the fixed support 6 are respectively provided with a fixed contact 3, the lower moving contact 502 and the upper contact 503 are respectively contacted with the fixed contact 3, and the fuse tube 501 is internally provided with a fuse;

a pull ring 505 is fixedly mounted to the outer wall of the fuse tube 501, the pull ring 505 being used to pull the fuse tube 501 off the fixing bracket 6.

The movable groove 706 is formed in the fixed support 6, the movable groove 706 is used for providing a moving space for the blocking block 704, the connecting spring 705 is located in the movable groove 706 and sleeved on the outer side of the movable rod 703, one end of the connecting spring 705 is fixedly connected to the bottom of the blocking block 704, and the other end of the connecting spring 705 is fixedly connected to the fixed support 6.

In this embodiment: when the device is in fault facing to the high-voltage line, at the moment, the fuse wire in the fuse wire tube 501 is blown due to the rapid increase of temperature, and the upper end contact 503 loses the tension of the fuse wire, so that the fuse wire tube 501 leaves the spring plate 4 and rotates in the fixed bracket 6 around the rotating shaft 504 under the action of gravity, and the upper end contact 503 is downward;

it should be noted that, two hooks are provided on the insulating rod for removing the fuse tube 501, one hook is located on the outer wall of the insulating rod, the other hook is located on the top of the insulating rod, when the fuse tube 501 needs to be removed from the high-voltage fuse, the hook on the outer wall of the insulating rod is placed into the pull ring 505, then the hook on the top of the insulating rod is placed into the inner side of the circular ring 701, the insulating rod is controlled to pull the circular ring 701 downward to drive the connecting rod 702 to move downward, so that the movable rod 703 drives the blocking piece 704 to move in the movable groove 706, the blocking state of the blocking piece 704 on the rotating shaft 504 is released, and the connecting spring 705 is compressed at this time;

the fuse tube 501 slides down under the action of gravity, and the fuse tube 501 is hung on an insulating rod through a pull ring 505, so that a broken fuse is quickly taken out;

the insulating rod is taken out, and the connecting spring 705 rebounds to drive the blocking block 704, the connecting rod 702 and the movable rod 703 to return to the original positions.

Referring to fig. 1, 2, 4 and 6, a connection terminal 8 is respectively arranged at the top and bottom of the insulator 1, the connection terminal 8 is used for communicating current, a mounting bracket 2 is arranged on the outer wall of the insulator 1, and the mounting bracket 2 is used for connecting the insulator 1 with an external mounting bracket.

In this embodiment: this structure can be with the current transportation to next transformer department through binding post 8 when the normal work of fuse, through fixing installing support 2 and outside installing support through the bolt to reach the purpose of the outdoor drop-out fuse of installation fixation.

Referring to fig. 5, the spring plate 4 has a bump formed therein, and the upper contact 503 is restrained and fixed by the bump, and the fixed contact 3 and the spring plate 4 are elastic.

In this embodiment: when the fuse works normally, the upper contact 503 is lifted upwards by a certain radian under the pulling of the fuse wire in the fuse tube 501, so that the upper contact 503 can be fixed through the internal protruding block of the spring plate 4, and thus, the current conduction work is carried out.

Referring to fig. 1 to 6, the elastic force of the connecting spring 705 is greater than the sum of the weights of the ring 701 and the link 702.

In this embodiment: in daily use of the outdoor drop-out fuse, the fuse tube 501 is prevented from falling off from the fixed support 6 due to the fact that the fuse tube 501 fails due to the connecting spring 705.

Referring to fig. 2 to 4, the end of the blocking piece 704 away from the insulator 1 is formed with a curvature.

In this embodiment: when the fuse tube 501 is replaced, the rotating shaft 504 at the bottom of the fuse tube 501 can be pushed by the insulating rod to squeeze the blocking block 704, so that the blocking block 704 moves downwards, and the rotating shaft 504 enters the groove in the fixed support 6, so that the fuse tube 501 can be quickly installed.

The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides an outdoor high voltage drop-out fuse, includes insulator (1), fixed bolster (6) are installed to the bottom of insulator (1), the inboard shaping of fixed bolster (6) has the recess, fixed bolster (6) top is provided with fuse (5), fuse (5) include pivot (504), its characterized in that, the inside of fixed bolster (6) is provided with blocking structure (7), blocking structure (7) are used for spacing pivot (504);

the blocking structure (7) comprises a circular ring (701), a connecting rod (702), a movable rod (703), a blocking block (704), a connecting spring (705) and a movable groove (706);

the circular ring (701) is arranged at the bottom of the fixed support (6), the connecting rod (702) is fixedly arranged at the top of the circular ring (701), and the movable rod (703) is fixedly arranged at the top end of the connecting rod (702) and penetrates into the fixed support (6);

the blocking block (704) is fixedly arranged at the top end of the movable rod (703) and is attached to the side face of the rotating shaft (504), and the blocking block (704) is used for blocking the fuse tube (501).

2. An outdoor high-voltage drop-out fuse according to claim 1, wherein a spring plate (4) is arranged at the top of the insulator (1), the fuse (5) further comprises a fuse tube (501), a lower moving contact (502), an upper end contact (503) and a pull ring (505), one fixed contact (3) is respectively arranged on the inner sides of the spring plate (4) and the fixed support (6), the lower moving contact (502) and the upper end contact (503) are respectively contacted with the fixed contact (3), and a fuse wire is arranged inside the fuse tube (501);

the pull ring (505) is fixedly arranged on the outer wall of the fuse tube (501), and the pull ring (505) is used for pulling the fuse tube (501) to be separated from the fixed support (6).

3. The outdoor high-voltage drop-out fuse according to claim 1, wherein the movable slot (706) is formed in the fixed support (6), the movable slot (706) is used for providing a moving space for the blocking block (704), the connecting spring (705) is located in the movable slot (706) and sleeved on the outer side of the movable rod (703), and one end of the connecting spring (705) is fixedly connected to the bottom of the blocking block (704) and the other end is fixedly connected to the fixed support (6).

4. An outdoor high-voltage drop-out fuse according to claim 1, wherein the top and bottom of the insulator (1) are respectively provided with a wiring terminal (8), the wiring terminals (8) are used for communicating current, the outer wall of the insulator (1) is provided with a mounting bracket (2), and the mounting bracket (2) is used for connecting the insulator (1) with an external mounting bracket.

5. An outdoor high voltage drop out fuse according to claim 2, wherein said spring plate (4) has internally formed projections, said upper contact (503) being restrained by the projections, said stationary contact (3) and spring plate (4) each having elasticity.

6. An outdoor high voltage drop out fuse according to claim 1, wherein the spring force of said connecting spring (705) is greater than the sum of the weights of the circular ring (701) and the connecting rod (702).

7. An outdoor high voltage drop out fuse as claimed in claim 1 wherein the end of the barrier block (704) remote from the insulator (1) is shaped with a curvature.