CN210378956U

CN210378956U - Drop-out fuse

Info

Publication number: CN210378956U
Application number: CN201921690484.1U
Authority: CN
Inventors: 顾立立; 周宗良; 刘慧科; 章卫杰
Original assignee: SUNRISE GROUP CO Ltd
Current assignee: SUNRISE GROUP CO Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-04-21
Anticipated expiration: 2029-10-10

Abstract

The utility model relates to a drop-out fuse, including insulator, upper bracket, lower carriage and fusion tube, be equipped with the static contact on the upper bracket, fusion tube one end is equipped with the moving contact that can contact the electrical connection with the static contact, be equipped with the fuse in the fusion tube, the fuse still includes and turns over board, lower copper sheathing and lower movable connecting piece, lower movable connecting piece is articulated with lower copper sheathing and turning over the board respectively, the fuse free end is fixed on the fixed column of lower movable connecting piece upper end, lower copper sheathing outer end is equipped with the lug, the lug offsets with lower movable connecting piece lower extreme in order to restrict lower copper sheathing rotation when the fuse is not cracked; the drop-out fuse further comprises a torsion spring assembly which is connected with the lower moving connecting piece in a matched mode, and when the fuse wire is broken, the torsion spring assembly pushes the lug to enable the lower copper sleeve to rotate, so that the moving contact is separated from the fixed contact. By adopting the design, the fusion tube can ensure falling under the action of the torsion and gravity of the torsion spring assembly.

Description

Drop-out fuse

Technical Field

The utility model relates to a power equipment technical field, concretely relates to drop out fuse.

Background

The drop-out fuse is used as a protection device and widely applied to a high-voltage distribution system and a control system, and the working principle of the drop-out fuse is that when the current exceeds a specified value, the melt of the fuse is fused by the heat generated by the drop-out fuse, and a contact at one end of a fuse tube of the fuse is dropped and disconnected, so that a circuit is disconnected, and the purpose of circuit breaking protection is realized. However, due to structural limitation, the existing drop-out fuse has the problem that a fusion tube is easy to drop after a melt is fused, so that the use safety is affected; and the umbrella skirt of the existing drop-out fuse insulating part is equivalent in size, which is not beneficial to improving the power frequency voltage of the drop-out fuse.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a can ensure the drop out fuse that the fusion tube can fall and be favorable to the power frequency voltage to improve when fuse-element fusing.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a drop out fuse, includes the insulator, sets up upper bracket and the lower carriage at the insulator both ends and the fusion tube that sets up side by side with the insulator, be equipped with the static contact on the upper bracket, fusion tube one end is equipped with the moving contact that can contact the electricity with the static contact and be connected, be equipped with the fuse wire that stretches out from the fusion tube other end in the fusion tube, its characterized in that: the drop-out fuse further comprises a turning plate fixed on the lower support, a lower copper sleeve sleeved at the other end of the fuse tube and a lower movable connecting piece used for connecting the turning plate and the lower copper sleeve, wherein the lower movable connecting piece is respectively hinged with the lower copper sleeve and the turning plate; the drop-out fuse further comprises a torsion spring assembly which is connected with the lower moving connecting piece in a matched mode, and when the fuse wire is broken, the torsion spring assembly pushes the lug to enable the lower copper sleeve to rotate, so that the moving contact is separated from the fixed contact.

Further, the torsional spring subassembly includes torsional spring and tongue piece, be equipped with the fixed axle on the connector that moves down, the shaping of tongue piece both sides has the connection piece, torsional spring and connection piece activity cover are established on the fixed axle, the both ends of torsional spring respectively with connector and tongue piece fixed connection move down, when the fuse breaks, the torsion of torsional spring is used in the tongue piece in order to push down the copper sheathing rotation.

Furthermore, the lower end section of the tongue piece is designed in a V shape. This may increase the strength of the tongue.

Furthermore, a groove matched with the shape of the end part of the moving contact is formed on the static contact. Therefore, the movable contact and the static contact can be matched more stably and reliably.

Furthermore, articulated shafts hinged with the turning plates are arranged on two sides of the downward moving connecting piece, and the fixed shafts and the articulated shafts are coaxially arranged.

Furthermore, a plurality of sheds arranged at intervals are formed in the radial direction of the insulator, and each shed comprises a large shed and a small shed which are adjacent to each other.

Compared with the prior art, the utility model has the advantages of it is following: by arranging the torsion spring assembly, when the fuse wire is broken, the torsion spring assembly pushes the lug to enable the lower copper sleeve to rotate, and an extra force is applied on the basis of the self gravity of the fusion tube to enable the fusion tube to fall more reliably, so that the use safety is improved; the umbrella skirt on the insulator is designed to be an adjacent structure of the large umbrella skirt and the small umbrella skirt, so that the power frequency withstand voltage of the drop-out fuse can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a drop-out fuse according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural diagram of a drop-out fuse according to a preferred embodiment of the present invention in another direction;

fig. 3 is a schematic diagram of an explosion structure of a drop-out fuse according to a preferred embodiment of the present invention;

fig. 4 is a schematic view of a tongue structure according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the terms of orientation and positional relationship indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of protection of the present invention.

As shown in fig. 1 to 4, which are schematic structural diagrams of a preferred embodiment of the present invention, as shown in the drawings, the drop-out fuse includes an insulator 100, an upper bracket 200 and a lower bracket 300 disposed at two ends of the insulator 100, and a fuse tube 400 disposed side by side with the insulator 100, the upper bracket 200 is provided with a static contact 210, one end of the fuse tube 400 is provided with a movable contact 410 capable of contacting with the static contact 210 for electrical connection, a fuse wire (not shown in the drawings) extending from the other end of the fuse tube 400 is disposed in the fuse tube 400, the drop-out fuse further includes a flip 310 fixed on the lower bracket 300, a lower copper sleeve 420 disposed at the other end of the fuse tube 400, and a lower movable connector 320 for connecting the flip 310 and the lower copper sleeve 420, the lower movable connector 320 is respectively hinged to the lower copper sleeve 420 and the flip 310, the free end of the fuse wire is fixed on a fixed column 321 at the upper end of the, the bump 421 abuts against the lower end of the downward moving connecting piece 320 to limit the rotation of the lower copper sleeve 420 when the fuse is not broken; the drop-out fuse further comprises a torsion spring component cooperatively connected with the lower moving connector 320, and when the fuse is broken, the torsion spring component pushes the protrusion 421 to rotate the lower copper sleeve 420, so that the moving contact 410 is separated from the stationary contact 210. In the normal use process of the falling device, the bump 421 on the lower copper sleeve 420 is abutted against the downward moving connecting piece 320 and is fixedly connected through a fuse wire, so that the lower copper sleeve 420 at the lower end of the fuse is in a rigid state, the downward moving connecting piece 320 and the turning plate 310 are in a rigid state, after the fuse wire of the fuse is fused, the bump 421 is pushed to enable the lower copper sleeve 420 to rotate under the action of the torsion spring assembly, so that the fuse tube obtains an extra force outside the gravity, the falling of the fuse tube 400 is more reliable, and the use safety is improved.

Specifically, the torsional spring subassembly includes torsional spring 330 and tongue piece 331, be equipped with fixed axle 322 on the connector 320 that moves down, the shaping of tongue piece 331 both sides has connection piece 332, torsional spring 330 and connection piece 332 activity cover are established on fixed axle 322, the both ends of torsional spring 330 respectively with connector 320 and tongue piece 331 fixed connection move down, when the fuse breaks, torsional spring 330's torsion is used in the tongue piece 331 in order to push up copper sheathing 420 down and rotate.

In this embodiment, the cross section of the lower end of the tongue 331 is designed in a V shape. This may increase the strength of the tongue.

In this embodiment, a groove 211 matching with the shape of the end of the movable contact 410 is formed on the fixed contact 210. This makes the engagement between the movable contact 410 and the stationary contact 210 more stable and reliable.

In this embodiment, two sides of the downward movement connector 320 are provided with a hinge shaft 323 hinged to the turning plate 310, and the fixed shaft 322 is coaxial with the hinge shaft 323.

In this embodiment, the insulator 100 is radially formed with a plurality of sheds 110 arranged at intervals, and the sheds 110 include a large shed and a small shed adjacent to each other. By adjusting the size and the distance of the umbrella skirt 110, the power frequency withstand voltage (wet test) of the fuse can be improved from the original 34kV/1min to more than 48kV/1min, so that the requirement that the power frequency withstand voltage (wet test) of the outdoor drop-out fuse of national network companies also needs to reach 48kV/1min is met.

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 above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a drop out fuse, includes the insulator, sets up upper bracket and the lower carriage at the insulator both ends and the fusion tube that sets up side by side with the insulator, be equipped with the static contact on the upper bracket, fusion tube one end is equipped with the moving contact that can contact the electricity with the static contact and be connected, be equipped with the fuse wire that stretches out from the fusion tube other end in the fusion tube, its characterized in that: the drop-out fuse further comprises a turning plate fixed on the lower support, a lower copper sleeve sleeved at the other end of the fuse tube and a lower movable connecting piece used for connecting the turning plate and the lower copper sleeve, wherein the lower movable connecting piece is respectively hinged with the lower copper sleeve and the turning plate; the drop-out fuse further comprises a torsion spring assembly which is connected with the lower moving connecting piece in a matched mode, and when the fuse wire is broken, the torsion spring assembly pushes the lug to enable the lower copper sleeve to rotate, so that the moving contact is separated from the fixed contact.

2. A drop out fuse as claimed in claim 1, wherein: the torsion spring assembly comprises a torsion spring and a tongue piece, a fixed shaft is arranged on the downward moving connecting piece, connecting pieces are formed on two sides of the tongue piece, the torsion spring and the connecting pieces are movably sleeved on the fixed shaft, two ends of the torsion spring are fixedly connected with the downward moving connecting piece and the tongue piece respectively, and when a fuse wire is broken, the torsion force of the torsion spring acts on the tongue piece to push the lower copper sleeve to rotate.

3. A drop out fuse as claimed in claim 2, wherein: the lower end section of the tongue piece is designed in a V shape.

4. A drop out fuse as claimed in claim 3, wherein: and a groove matched with the shape of the end part of the moving contact is formed on the static contact.

5. The drop out fuse of claim 4, wherein: articulated shafts hinged with the turning plates are arranged on two sides of the downward moving connecting piece, and the fixed shaft and the articulated shafts are coaxially arranged.

6. A drop out fuse as claimed in any one of claims 1 to 5, wherein: the insulator is radially formed with a plurality of sheds that the interval set up, the sheds include adjacent big sheds and little sheds each other.