CN218730774U

CN218730774U - Totally-enclosed fuse structure

Info

Publication number: CN218730774U
Application number: CN202222641225.8U
Authority: CN
Inventors: 孙涛; 唐玉峰
Original assignee: Shanghai Electric Porcelain Works Co ltd
Current assignee: Shanghai Electric Porcelain Works Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-03-24
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a totally-enclosed fuse structure, which comprises a fuse base, a fuse carrier, an upper lead assembly and a lower lead, wherein the fuse base is hollow, the upper end of the fuse base is provided with an insulating terminal, the upper lead assembly is provided with a wire inlet sleeve and an upper inlet wire, the top of the wire inlet sleeve is provided with a sealing rubber strip, the upper inlet wire penetrates through the wire inlet sleeve, and the upper inlet wire is connected with an external circuit through the insulating terminal; the lower lead is arranged on one side of the lower end of the fuse base, the lower lead extends into the cavity of the fuse base, the fuse carrier is assembled in the cavity of the fuse base, and an upper contact and a lower contact of the fuse carrier are respectively connected with the upper inlet wire and the lower lead; the fuse base is also provided with a hoop structure, and the hoop structure comprises an upper hoop body, a lower hoop body and an anti-falling module which are hinged with each other. The utility model discloses will carry and melt the piece, go up the lead wire subassembly and all seal up in the base with the lower lead wire to wrap up the inlet wire through joint strip, avoid its condition that appears leaking, reached the requirement of high insulation.

Description

Totally-enclosed fuse structure

Technical Field

The utility model relates to a fuse field specifically is a totally closed fuse structure.

Background

Conventionally, a drop-out fuse is often used to protect a transformer or a distribution line. The load drop-out fuse (hereinafter referred to as fuse) is suitable for distribution lines and distribution transformers with rated voltage of 10kV, rated current of less than 200A and frequency of 50Hz, and is used for overload and short-circuit protection and load current division and combination. The fuse consists of two parts, namely a base and an arc extinction device. When the fuse is at the switch-on position, the movable and static contacts are pressed by the compression spring to ensure enough pressure between the contacts, the lower end of the arc-extinguishing tube is provided with a rotatable torsion spring, and after the melt is loaded, the torsion spring is twisted tightly to ensure that the fuse wire is in a tensioned state to ensure the self-locking of the arc-extinguishing tube at the switch-on position.

As the upper and lower moving and static contact conductors of the drop-out fuse are exposed, foreign matters and trees are easy to hang to cause interphase or grounding short circuit of the fuse, and the drop-out fuse is one of key fault sources of an overhead line. In addition, the exposed conductor is easy to be rusted, which causes overheating caused by poor contact of the contact, the spring is annealed, and the overheating of the contact can cause vicious circle of resistance increase, so that the fusion tube is dropped to malfunction and power failure, or the contact is fused into a whole to cause the fusion tube not to fall off and lose function, therefore, in the prior art, an upper moving contact and a lower moving contact are generally sealed in a base to ensure that the condition that foreign matters are easy to hang cannot occur, namely, a fully-closed fuse structure, such as the fuse provided by the application number CN201520369986.X, although the fuse can certainly avoid the conditions of poor contact and the like of the drop-out fuse, after the inventor uses the invention for a long time, the hoop installed in the middle of the insulation of the base body porcelain of the fuse uses the commonly-used electric hoop fittings, and the hoop is easy to loosen, and therefore, the fully-closed fuse structure with the anti-dropping effect is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a totally closed fuse structure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a totally-enclosed fuse structure comprises a fuse base, a fuse carrying piece, an upper lead assembly and a lower lead, wherein the fuse base is hollow, an insulating terminal is arranged at the upper end of the fuse base, the upper lead assembly is provided with a wire inlet sleeve and an upper inlet wire, a sealing rubber strip is arranged at the top of the wire inlet sleeve, the upper inlet wire penetrates through the wire inlet sleeve, and the upper inlet wire is connected with an external circuit in a stringing mode through the insulating terminal; the lower lead is arranged on one side of the lower end of the fuse base, the lower lead extends into the cavity of the fuse base, the fuse carrier is assembled in the cavity of the fuse base, and an upper contact and a lower contact of the fuse carrier are respectively connected with the upper inlet wire and the lower lead; the fuse base is also provided with a hoop structure, the hoop structure comprises an upper hoop body, a lower hoop body and an anti-falling module, wherein the upper hoop body and the lower hoop body are hinged, and the rear ends of the upper hoop body and the lower hoop body are hinged.

Preferably, the front ends of the upper hoop body and the lower hoop body are locked and fixed through bolts and nuts to form a hoop part, the anti-falling modules are provided with a plurality of anti-falling modules and distributed on the inner side of the hoop part, and each anti-falling module comprises an anti-falling elastic sheet, a stud and a top block.

Preferably, the anti-falling elastic sheet is provided with edges and an elastic sheet shell, wherein the edges are integrally connected to two sides of the elastic sheet shell, and the edges are fixed on the hoop through screws.

Preferably, the elastic sheet shell is provided with a deformable inner cavity, the inner side of the elastic sheet shell is provided with a jacking block, the jacking block is in a semi-circular arc shape, and the upper end of the jacking block is connected with the stud.

Preferably, the stud thread penetrates through the spring piece shell and the hoop member and extends out of the hoop member, a screw head is arranged on the stud, and the stud can drive the ejector block to press the spring piece shell when rotating and enable the spring piece shell to deform so as to tightly abut against the fuse base.

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

the utility model seals the fuse-carrying part, the upper lead assembly and the lower lead in the base, and wraps the incoming line through the sealing rubber strip, thereby avoiding the leakage of the incoming line and meeting the requirement of high insulation; and adopt neotype staple bolt structure, utilize the double-screw bolt to compress tightly the anticreep shell fragment, make the anticreep shell fragment warp and then closely support the pressure with the base to realize better anticreep fixed effect.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is the schematic view of the hoop structure of the present invention.

In the figure: 1. a fuse base; 2. carrying a melting piece; 3. an upper lead assembly; 4. a down lead; 5. an anti-drop module; 501. an anti-falling elastic sheet; 502. a stud; 503. a top block; 6. an upper band body; 7. a lower hoop body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a totally-enclosed fuse structure comprises a fuse base 1, a fuse carrier 2, an upper lead component 3 and a lower lead 4, wherein the fuse base 1 is hollow, an insulation terminal is arranged at the upper end of the fuse base 1, the upper lead component 3 is provided with a wire inlet sleeve and an upper inlet wire, a sealing rubber strip is arranged at the top of the wire inlet sleeve, the wire inlet sleeve is internally penetrated with the upper inlet wire, and the upper inlet wire is connected with an external circuit in a stringing mode through the insulation terminal; the lower lead 4 is arranged on one side of the lower end of the fuse base 1, the lower lead 4 extends into the cavity of the fuse base 1, the fuse carrier 2 is assembled in the cavity of the fuse base 1, and an upper contact and a lower contact of the fuse carrier are respectively connected with the upper inlet wire and the lower lead 4; fuse base 1 still is equipped with the staple bolt structure, and the staple bolt structure includes articulated last hoop 6, lower hoop 7 to and anticreep module 5, wherein go up the

hoop

6, 7 rear end hinges of hoop down.

In this embodiment, the front ends of the upper hoop body 6 and the lower hoop body 7 are locked and fixed by bolts and nuts to form a hoop member, the anti-falling modules 5 are provided with a plurality of anti-falling pieces and distributed on the inner side of the hoop member, and each anti-falling module 5 comprises an anti-falling elastic piece 501, a stud 502 and a top block 503.

In this embodiment, the anti-releasing spring plate 501 has an edge and a spring plate shell, wherein the edge is integrally connected to two sides of the spring plate shell, and the edge is fixed on the hoop member by a screw.

In this embodiment, the shell fragment shell has a deformable inner cavity, the inner side of the shell fragment shell is provided with a top block 503, the top block 503 is in a semi-circular arc shape, and the upper end of the top block 503 is connected with the stud 502.

In this embodiment, the screw thread of the stud 502 penetrates through the spring plate shell and the hoop member and extends to the outside of the hoop member, the stud 502 is provided with a screw head, and the stud 502 can drive the ejector block 503 to press the spring plate shell when rotating, and the spring plate shell is deformed to tightly abut against the fuse base 1.

In this embodiment, the fuse carrier 2, the upper lead assembly 3 and the lower lead 4 are all sealed in the base, and the incoming line is wrapped by the sealing rubber strip, so that the situation of leakage is avoided, and the requirement of high insulation is met; and adopt neotype staple bolt structure, utilize double-screw bolt 502 to compress tightly anticreep shell fragment 501, make anticreep shell fragment 501 warp and then closely support the pressure with the base to realize the fixed effect of better anticreep.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A totally-enclosed fuse structure is characterized by comprising a fuse base (1), a fuse carrier (2), an upper lead assembly (3) and a lower lead (4), wherein the fuse base (1) is hollow, an insulating terminal is arranged at the upper end of the fuse base (1), the upper lead assembly (3) is provided with a wire inlet sleeve and an upper inlet wire, a sealing rubber strip is arranged at the top of the wire inlet sleeve, the upper inlet wire penetrates through the wire inlet sleeve, and the upper inlet wire is connected with an external circuit in a stringing mode through the insulating terminal; the lower lead (4) is arranged on one side of the lower end of the fuse base (1), the lower lead (4) extends into the cavity of the fuse base (1), the fuse carrier (2) is assembled in the cavity of the fuse base (1), and an upper contact and a lower contact of the fuse carrier are respectively connected with the upper inlet wire and the lower lead (4); fuse base (1) still is equipped with the staple bolt structure, and the staple bolt structure includes articulated last hoop body (6), lower hoop body (7) to and anticreep module (5), wherein go up hoop body (6), lower hoop body (7) rear end hinge.

2. A hermetically sealed fuse structure in accordance with claim 1, further comprising: go up hoop body (6), hoop body (7) front end down and pass through bolt, nut locking fixed and form a hoop spare, anticreep module (5) are equipped with a plurality ofly and it distributes in this hoop spare is inboard, and each anticreep module (5) all include anticreep shell fragment (501), double-screw bolt (502) and kicking block (503).

3. A hermetically sealed fuse structure in accordance with claim 2, further comprising: the anti-falling elastic sheet (501) is provided with edges and an elastic sheet shell, wherein the edges are integrally connected to two sides of the elastic sheet shell, and the edges are fixed on the hoop through screws.

4. A all-enclosed fuse structure according to claim 3, further comprising: the shell fragment shell has a deformable inner cavity, the inner side of the shell fragment shell is provided with a top block (503), the top block (503) is in a semi-circular arc shape, and the upper end of the top block (503) is connected with a stud (502).

5. A all-enclosed fuse structure according to claim 4, wherein: the screw thread of the stud (502) penetrates through the spring piece shell and the hoop part and extends out of the hoop part, a screw head is arranged on the stud (502), and the stud (502) can drive the ejector block (503) to press the spring piece shell tightly when rotating and enable the spring piece shell to deform so as to tightly abut against the fuse base (1).