CN205723422U - A kind of high-voltage explosion fuse - Google Patents

Abstract

nullThe utility model discloses a kind of high-voltage explosion fuse，Including fully closed shell，Described enclosure upper end is provided with upper locking device，Described enclosure lower end is provided with lower locking device，Described upper locking device and lower locking device both sides are provided with dropout，Described dropout contacts with inner surface of outer cover，Described upper locking device draws spring to be connected with fusion tube by axle，Described fusion tube is installed on lower locking device，Described fusion tube is provided with melt，Described melt is positioned at lower locking device，Described inner surface of outer cover is provided with epoxy tube，It is provided with arc quenching material plate between described epoxy tube and fusion tube，The outer surface of described shell is provided with silica gel outer insulator，Outdoor fuse breaking capacity to system breaking current can be significantly increased，Meet the growing needs of power distribution network，Have employed full-enclosed structure，The unexpected ground short circuit of system can be effectively prevented，Environmental factor is reduced or eliminated like rain、Snow、The impact on its performance for the factors such as icing.

Description

A kind of high-voltage explosion fuse

Technical field

The utility model relates to a kind of high-voltage explosion fuse, particularly relates to a kind of totally enclosed type High-voltage explosion fuse, belong to fuse field.

Background technology

With the rapid emergence of China's economic strength, supply network each side is wanted by entire society Asking and increasing substantially, distribution network also will occur many great changes.Town and country power distribution network by Low side configuration quickly strides forward to high end configuration, and power distribution network capacity increases substantially, and way to manage is entered One-step optimization.The requirement of power distribution network has been brought up to a front institute by the construction of intelligent power network especially Not some height.And outdoor drop-out fuse occupies important function in terms of distribution protection, Outdoor drop-out fuse is a kind of simple in construction, protects outdoor high-voltage reliable, with low cost Electrical protection apparatus, has the features such as easy to operate, environmental suitability is strong.It can be used for distribution The overload of circuit and distribution transformer, short-circuit protection and isolated from power.

Exactly because its simple in construction, operating principle and the version of fuse switch are tens of Substantially there is not the change of essence in year.Outdoor drop-out fuse was once considered as one Low-end product, it captures Chinese market in a large number, for a long time, until external in recent years height End product enters, and people just really recognize its advantage, and as power supply reliability is wanted by society The raising asked, people also more recognize the importance of this product.

As a ripe traditional product, fuse switch has simple in construction, is fabricated to The advantages such as this is low, easy to use, but also feature Just because of this, just make this product Structure and performance many decades there is no the change of essence.With being continually changing and each side of electrical network The raising that face requires, the property of following 3 aspects of its existence of the structures shape of tradition fuse switch Energy defect:

A) tradition fuse switch is complete exposed structure, and it is influenced by environmental conditions non- Chang great.One is that arc-extinguishing tube is aging, and research shows, a qualified outdoor drop-out fuse, After running 1 year out of doors, its breaking capacity will decline more than 10%.Two are as amblent air temperature bar The change of part, its unstable properties.Its performance is had by the different weather conditions such as rain, snow, ice Significantly impact, and the type approval test project of product is all not related to these contents.In addition, by Entirely expose in product live part, cause the possibility of electrical network accidental short circuit to increase.Current China Major part urban distribution network all employs insulated conductor, and whole power distribution network all takes insulating protection and arranges Execute, but fuse becomes an obvious weak spot.

B) breaking capacity is low, increasingly can not meet the growing requirement of electrical network.At present I State's electrical network substantially requires that its breaking capacity reaches 12.5KA, and some users also require its single Destructive breaking capacity reaches 16KA.At north America region, much important user have employed one Planting the Large Copacity fuse with arc-extinguishing medium, its connecting-disconnecting function is 12.5KA, 16KA, has Even more high.In China, although the manufacturer that great majority produce tradition fuse switch can The production-type test report enough providing connecting-disconnecting function to be 12.5KA, but actually produce in batches The product really being able to reach this level is simultaneously few.And with the development of China's electrical network, The requirement improving further is also had to this parameter.

C) fusion tube size is mated bad with fuse fixed contact position size, easily loosens, Operation runs into external force effect, vibration or strong wind sleety weather, easily voluntarily malfunction and fall.

The existence of above-mentioned 3 aspect defects, not only adds the workload of rural power attendant, and And easily cause the improper use of attendant, and owing to its capacity is unsatisfactory for requiring, fall The due defencive function of the formula that falls fuse is not in full use.Therefore, for tradition drop type The shortcoming that fuse exists, it is necessary to develop a kind of totally-enclosed, breaking capacity is high and dependable performance Novel drop type fuse.

Utility model content

The purpose of this utility model is: provide a kind of high-voltage explosion fuse, can be significantly Improve the outdoor breaking capacity to system breaking current for the fuse, meet power distribution network growing Need, have employed full-enclosed structure, the unexpected ground short circuit of system can be effectively prevented, subtract Little or eliminate environmental factor like rain, the impact on its performance for the factor such as snow, icing.Due to This product have employed full-enclosed structure, also can slow down the aging of fusion tube, improves the use of product Life-span.

For achieving the above object, the utility model is by the following technical solutions:

A kind of high-voltage explosion fuse, including fully closed shell, in described enclosure End is provided with upper locking device, and described enclosure lower end is provided with lower locking device, described upper locking Device and lower locking device both sides are provided with dropout, and described dropout contacts with inner surface of outer cover, institute Stating upper locking device draws spring to be connected with fusion tube by axle, and described fusion tube is installed on lower locking device On, described fusion tube is provided with melt, and described melt is positioned at lower locking device, in described shell Surface is provided with epoxy tube, is provided with arc quenching material plate, described shell between described epoxy tube and fusion tube Outer surface be provided with silica gel outer insulator.

Preferably, described silica gel outer insulator is equidistantly located at some wedge angle contacts.

The beneficial effects of the utility model are, outdoor fuse can be significantly increased to system The breaking capacity of breaking current, meets the growing needs of power distribution network, have employed totally enclosed type Structure, can be effectively prevented the unexpected ground short circuit of system, be reduced or eliminated environmental factor like rain, The impacts on its performance for the factor such as snow, icing.Owing to this product have employed totally enclosed type knot Structure, also can slow down the aging of fusion tube, have employed special structure and arc quenching material, breaking capacity Can be greatly improved；Electric and the mechanical performance of this novel high-pressure fuse switch can be very steady Fixed, not only replace fuse very convenient, and can avoid because Rig up error causes fuse Voluntarily malfunction and fall, can effectively reduce the trip-out rate of circuit and the fault of distribution transformer Rate, reduces the workload of attendant.

Brief description

If Fig. 1 is the utility model overall structure schematic diagram；

Wherein, 1-shell；2-upper locking device；Locking device under 3-；4-threads off；5-axle draws Spring；6-fusion tube；7-melt；8-epoxy tube；9-arc quenching material plate；10-silica gel external insulation Body；11-wedge angle contact.

Detailed description of the invention

For make the utility model realize technological means, creation characteristic, to reach purpose easy with effect In clear understanding, below in conjunction with detailed description of the invention, the utility model is expanded on further.

Embodiment

As it is shown in figure 1, a kind of high-voltage explosion fuse, it is characterised in that include totally-enclosed The shell 1 of formula, described shell 1 inner upper end is provided with upper locking device 2, in described shell 1 Subordinate's end is provided with lower locking device 3, described upper locking device 2 and lower locking device 3 both sides peace Equipped with dropout 4, described dropout 4 contacts with shell 1 inner surface, and described upper locking device 2 leads to Crossing axle draws spring 5 to be connected with fusion tube 6, and described fusion tube 6 is installed on lower locking device 3, institute Stating fusion tube 6 and being provided with melt 7, described melt 7 is positioned at lower locking device 3, described shell 1 inner surface is provided with epoxy tube 8, is provided with arc quenching material plate between described epoxy tube 8 and fusion tube 6 9, the outer surface of described shell 1 is provided with silica gel outer insulator 10；

It is equidistantly located at some wedge angle contacts 11 on described silica gel outer insulator 10.

Concrete, operation principle: when this fuse is properly functioning, melt is by pull spring Tensile force makes fuse be in closure state.When system jam, fault current makes fuse Fusing rapidly, pull spring can pull fusion tube to move up quickly, without barrier.Arc quenching material Heat produced by plate can make its a number of inert gas of generation that disappears, the rapid movement of fusion tube With the arc extinguishing effect of inert gas, can extinguish rapidly, cut off short circuit current, when pull spring fortune When moving top, making the upper and lower locking device of fuse unclamp, come off fusion tube.

Based on above-mentioned, outdoor fuse blocking energy to system breaking current can be significantly increased Power, meets the growing needs of power distribution network, have employed full-enclosed structure, can effectively prevent The unexpected ground short circuit of locking system, be reduced or eliminated environmental factor like rain, the factor such as snow, icing Impact on its performance.Owing to this product have employed full-enclosed structure, also can slow down molten Pipe aging, have employed special structure and arc quenching material, and breaking capacity can be greatly improved；Should Electric and the mechanical performance of novel high-pressure fuse switch can be highly stable, not only replaces fuse Very convenient, and can avoid because Rig up error causes fuse malfunction voluntarily to fall, Can effectively reduce the trip-out rate of circuit and the fault rate of distribution transformer, reduce attendant's Workload.

Those of ordinary skill in the art is it should be appreciated that above embodiment is only to use The utility model is described, and is not used as to restriction of the present utility model, as long as in this reality With in novel spirit, change, the modification of embodiment described above all will be fallen In right of the present utility model.

Claims (2)

1. a high-voltage explosion fuse, it is characterised in that include fully closed shell, Described enclosure upper end is provided with upper locking device, and described enclosure lower end is provided with lower locking dress Putting, described upper locking device and lower locking device both sides are provided with dropout, described dropout and shell Inner surface contacts, and described upper locking device draws spring to be connected with fusion tube by axle, and described fusion tube is pacified Being loaded on lower locking device, described fusion tube is provided with melt, and described melt is positioned at lower locking device In, described inner surface of outer cover is provided with epoxy tube, is provided with arc extinguishing material between described epoxy tube and fusion tube Flitch, the outer surface of described shell is provided with silica gel outer insulator.

2. a kind of high-voltage explosion fuse according to claim 1, it is characterised in that It is equidistantly located at some wedge angle contacts on described silica gel outer insulator.