CN201408727Y - Fuse base - Google Patents

Abstract

The utility model discloses a fuse base, comprising a shell, a mounting base, a middle conductive ring and a front end conductive ring; wherein the mounting base, the middle conductive ring and the front conductive ring are respectively arranged at rear portion, middle portion and front portion of the base, a mounting guide portion is provided between the mounting base and the middle conductive ring, an interphase guide portion is provided between the middle guiding ring and the front conducive ring, the mounting guide portion has a variable-diameter end near the middle conductive ring, whilethe inner diameter of the shell thereof is reduced gradually to be equal to the inner diameter of the middle conductive ring, the middle conductive ring and the front conductive ring have variable-diameter sections connected with the interphase guide portion, and the two variable-diameter section are gradually increased towards the interphase guide portion to be equal to the inner diameter of theinterphase guide portion. The fuse base can reduce the compression force between contact spring and base guide portion, to prevent residual metal powder on the inner wall of base after friction, and prevent ground insulation property of fuse from reduction.

Description

A kind of fuse base

Technical field

The utility model relates to a kind of fuse base.

Background technology

From the nineties, China introduces U.S.'s box-type substation, and structurally with on-load switch, loop networks switch and fuse structure simplification are put into oil tank of transformer and be immersed in oil.American case becomes the high-pressure side and adopts the fuse protection, and on-load switch only plays the function of switching conversion and cutoff high load current.When a phase fuse failure appears in the high-pressure side, the voltage of low-pressure side just reduces, and moulds under voltage protection of shell automatic air-break switch or overcurrent protection and will move, and low pressure operation can not take place.

Fuse generally includes base 1, fuse member 2 and handle 3, as shown in Figure 1.Fuse member 2 is removably mounted in the support 31 of handle 3.And fuse member 2 two ends contact with the set spring 31 2 in support 31 two ends respectively.Fuse member 2 and handle 3 are installed in base 1 inside jointly, and described spring 312 contacts with two conducting rings 13,14 on the base 1 respectively.

Fuse has plug-in type and bus-type according to the installation form branch.Vertical plug-in type tubular fuse base of prior art, because between middle part conducting ring and the mounting base, guide section promptly is installed, internal diameter size is consistent with the conducting ring internal diameter of contact connection, install in the plug process at handle and fuse member, the compression stress of contact spring and base guide section is big, the build-up of pressure friction, metal dust after base inner wall stays friction reduces even puncture fuse insulation property relatively.

Summary of the invention

The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of fuse base of features simple structure to be provided, and it can reduce the friction of base inner guide segments effectively.

The technical scheme that realizes above-mentioned purpose is: a kind of fuse base, described fuse comprises base cylindraceous and fuse member, described fuse member is installed on base inside, described handle inserts base inside, described fuse member and handle removably link together in base inside, described fuse base comprises shell, mounting base, middle part conducting ring and front end conducting ring, wherein

Described mounting base, middle part conducting ring and front end conducting ring lay respectively at rear portion, middle part and the front portion of described base, it is Wrapping formed that described shell strengthens composite insulating material by epoxy glass fiber, and described mounting base and two conducting rings are connected as one.

For guide section is installed, be alternate guide section between described middle part conducting ring and the front end conducting ring between described mounting base and the middle part conducting ring, the internal diameter of outer cover of described installation guide section and alternate guide section equates.

Described installation guide section is a reducer near an end of middle part conducting ring, and the internal diameter of outer cover of this reducer is contracted to gradually with middle part conducting ring internal diameter and equates.

The position that described middle part conducting ring, front end conducting ring are connected with alternate guide section is a reducer, and described two reducers enlarge gradually towards alternate guide section direction internal diameter, until equating with alternate guide section internal diameter.

Described installation guide section is a conical surface transition near the reducer inwall of middle part conducting ring one end.

Owing to adopted the technical scheme of a kind of fuse base of the present utility model, enlarged the internal diameter of base inner guide segments, make its internal diameter greater than conducting ring; Simultaneously, reducer between two guide sections and two conducting rings is a gradual transition, it is conical surface transition that the close reducer inwall that is positioned at conducting ring one end at middle part of guide section especially is installed, its beneficial effect is: when handle and fuse member insertion base inside, reduced the compression stress of contact spring and base guide section, reduce friction, avoid the metal dust after base inner wall stays friction, ensured that also fuse insulation property relatively do not reduce when promptly lowering handle installation contact engaging and separating force.

Description of drawings

Fig. 1 is the overall structure schematic diagram of fuse;

Fig. 2 is the structural representation of a kind of fuse base of the present utility model;

Fig. 3 is the enlarged drawing at A position among Fig. 2.

Embodiment

In order to understand the technical solution of the utility model better, below by embodiment particularly and be described in detail in conjunction with the accompanying drawings:

See also Fig. 2 and Fig. 3, a kind of fuse base of the present utility model, described fuse comprises base cylindraceous and fuse member, described fuse member is installed on base inside, described handle inserts base inside, and described fuse member and handle removably link together in base inside, and described fuse base comprises shell 11, mounting base 12, middle part conducting ring 13 and front end conducting ring 14, wherein

Described mounting base 12, middle part conducting ring 13 and front end conducting ring 14 lay respectively at rear portion, middle part and the front portion of described base, it is Wrapping formed that described shell 11 strengthens composite insulating material by epoxy glass fiber, and described mounting base 12, middle part conducting ring 13 and front end conducting ring 14 are connected as one;

For guide section 15 is installed, be alternate guide section 16 between described middle part conducting ring 13 and the front end conducting ring 14 between described mounting base 12 and the middle part conducting ring 13, the internal diameter of outer cover of described installation guide section 15 and alternate guide section 16 equates;

Described installation guide section 15 is a reducer 150 near middle part conducting ring 13 1 ends, and the internal diameter of outer cover of this reducer 150 is contracted to gradually with middle part conducting ring 13 internal diameters and equates;

The position that described middle part conducting ring 13, front end conducting ring 14 are connected with alternate guide section 16 is a reducer, and described two reducers 130,140 enlarge gradually towards alternate guide section 16 direction internal diameters, until equating with alternate guide section 16 internal diameters.

Described installation guide section 15 is a conical surface transition near reducer 150 inwalls of middle part conducting ring 13 1 ends.

When handle and fuse member insertion base inside, successively by guide section 15, middle part conducting ring 13, the alternate guide section 16 of front end and conducting ring 14 are installed.Because the internal diameter of the internal diameter of outer cover of guide section 15 and alternate guide section 16 greater than middle part conducting ring 13 and front end conducting ring 14 is installed, and internal diameter varies is progressive formation, can smooth transition, therefore, the technical scheme of a kind of fuse base that the utility model adopts, reduced the compression stress of contact spring and base guide section, reduce friction, avoid the metal dust after base inner wall stays friction, ensured that also fuse insulation property relatively do not reduce when promptly lowering handle installation contact engaging and separating force.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims (2)

1. fuse base, described fuse comprises base cylindraceous and fuse member, described fuse member is installed on base inside, described handle inserts base inside, described fuse member and handle removably link together in base inside, described fuse base comprises shell, mounting base, middle part conducting ring and front end conducting ring, it is characterized in that

Described mounting base, middle part conducting ring and front end conducting ring lay respectively at rear portion, middle part and the front portion of described base, it is Wrapping formed that described shell strengthens composite insulating material by epoxy glass fiber, and described mounting base, middle part conducting ring and leading portion conducting ring are connected as one;

For guide section is installed, be alternate guide section between described middle part conducting ring and the front end conducting ring between described mounting base and the middle part conducting ring, the internal diameter of outer cover of described installation guide section and alternate guide section equates;

Described installation guide section is a reducer near middle part conducting ring one end, and the internal diameter of outer cover of this reducer is contracted to gradually with the internal diameter of middle part conducting ring and equates;

The position that described middle part conducting ring, front end conducting ring are connected with alternate guide section is a reducer, and described two reducers enlarge gradually towards alternate guide section direction internal diameter, until equating with alternate guide section internal diameter.

2. according to claim 1 fuse base, it is characterized in that described installation guide section is a conical surface transition near the reducer inwall of middle part conducting ring one end.

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