阅读说明：本技术 一种快速直流熔断器 (Quick direct current fuse ) 是由 耿鹏 夏星煜 周兴 龚博 葛启桢 于 2020-12-22 设计创作，主要内容包括：本发明公开了一种快速直流熔断器,包括外壳、设置在外壳内的填充物以及从外壳引出的两个电极对,正电极对由相对设置的正电极一和正电极二组成,负电极对由相对设置的负电极一和负电极二组成,正电极对和负电极之间设置有隔离绝缘片,所述的外壳内设置有与电极连接的电极接头,电极接头上连接有导电连接片,所述的导电连接片由多个导电片通过熔体粘合的方式首尾连接而成；该熔断器同时导通正极电流和负极电流,利用短路电流的热效应和电磁效应的同时作用,达到快速熔断的目的。(The invention discloses a rapid direct current fuse, which comprises a shell, a filler arranged in the shell and two electrode pairs led out from the shell, wherein the positive electrode pair consists of a positive electrode I and a positive electrode II which are oppositely arranged; the fuse simultaneously conducts the anode current and the cathode current, and achieves the purpose of quick fusing by utilizing the simultaneous action of the heat effect and the electromagnetic effect of the short-circuit current.)

1. A fast direct current fuse, characterized by: including shell (6), set up filler (5) in shell (6) and two electrode pairs of drawing forth from shell (6), the positive electrode is to forming by relative positive electrode one (1) and positive electrode two (3) that set up, and the negative electrode is to forming by relative negative electrode one (2) and negative electrode two (4) that set up, is provided with between positive electrode pair and the negative electrode and keeps apart insulating piece (8), shell (6) in be provided with electrode joint (9) with electrode connection, be connected with the conductive connection piece on electrode joint (9), the conductive connection piece form through the mode end to end connection of fuse-element bonding by a plurality of conducting strips (7).

2. A fast dc-fuse according to claim 1, characterized in that said insulating spacer sheet (8) is a mica sheet.

3. A fast dc fuse as claimed in claim 1, characterised in that said insulating spacer (8) is connected at each end to said casing (6) by means of a turret (10).

4. A fast dc-fuse according to claim 1, characterized in that said conducting strip (7) is provided with teeth at each end.

Technical Field

The invention belongs to the technical field of electric power, relates to protection of a direct current system, and particularly relates to a novel rapid direct current fuse.

Background

The fuse is one of protection devices commonly used in the electrical field, and the general fuse utilizes the thermal effect principle of conductor through-flow, when larger fault current occurs, the thermal effect melts the conductor inside the fuse to form an open circuit, so as to obtain the fault isolation effect.

The existing direct current fuse which simply utilizes the heat effect to fuse the melt in the fuse quickly has the defect of overlong action time.

Disclosure of Invention

The present invention is directed to provide a novel fast dc fuse, which utilizes the thermal effect and electromagnetic effect of short-circuit current to accelerate the fuse operation.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a quick direct current fuse, includes the shell, sets up filler in the shell and two electrode pairs that draw forth from the shell, the positive electrode is to forming by relative positive electrode one and positive electrode two that set up, and the negative electrode is to forming by relative negative electrode one and negative electrode two that set up, is provided with the isolation insulating piece between positive electrode pair and the negative electrode, the shell in be provided with the electrode joint with electrode connection, the last electrically conductive connection piece that is connected with of electrode joint, electrically conductive connection piece form through melt-bonding's mode end to end by a plurality of conducting strips.

The quick direct current fuse is characterized in that the isolation insulation sheet is a mica sheet.

The two ends of the isolation insulation sheet of the rapid direct current fuse are respectively connected with the shell through the tower.

The two ends of the conducting strip of the rapid direct current fuse are respectively provided with a tooth part.

The invention has the beneficial effects that: two electrode pairs of during operation switch on positive pole electric current and negative pole electric current respectively, when the fuse later stage takes place positive negative pole short circuit, short-circuit current will form the return circuit through two inside electrode branch roads of fuse and short-circuit point, short-circuit current makes junction conductor between the conducting strip fusing that generates heat on the one hand, on the other hand, when short-circuit current flows through two branch roads, will produce the electromagnetic force that becomes tangential direction with the conducting strip, weak junction between the conducting strip is cut off, utilize short-circuit current's heat effect and electromagnetic effect acceleration fuse action, two factors combined action, reach the purpose of shortening fuse action time.

Drawings

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

FIG. 2 is a schematic structural view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of a conductive sheet according to the present invention;

fig. 4 shows the through-current circuit and the direction of the electromagnetic force of the fuse according to the invention.

The figures are numbered: 1-positive electrode one, 2-negative electrode one, 3-positive electrode two, 4-negative electrode two, 5-filler, 6-shell, 7-conducting strip, 8-isolating insulating strip, 9-electrode joint and 10-tower.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Referring to fig. 1, the invention discloses a novel fast dc fuse, comprising a housing 6, a filler 5 arranged in the housing 6, and a positive electrode pair and a negative electrode pair led out from the housing 6, wherein the filler 5 plays roles of arc extinction, heat dissipation and the like, the positive electrode pair consists of a first positive electrode 1 and a second positive electrode 3 which are oppositely arranged, the negative electrode pair consists of a first negative electrode 2 and a second negative electrode 4 which are oppositely arranged, the two electrode pairs are arranged in parallel, the first positive electrode 1 and the first negative electrode 2 are arranged on one side of the housing 6, the second positive electrode 3 and the second negative electrode 4 are arranged on one side of the housing and are respectively conducted with a positive current and a negative current, an isolation insulation sheet 8 is arranged between the positive electrode pair and the negative electrode, wherein the isolation insulation sheet 8 is a mica sheet which plays a role of arc extinction and insulation and is connected with the positive and negative, the electrode joint 9 is connected with a conductive connecting sheet, as shown in fig. 2, the conductive connecting sheet is formed by connecting a plurality of conductive sheets 7 end to end in a melt bonding mode, the weak connection part of the melt bonding part generates heat and is easy to melt or vaporize after the fuse has a current exceeding the rated current, and the higher the current is, the faster the fuse is; as shown in fig. 3, the conductive plate 7 has teeth at both ends.

The direct current fuse accelerates the action of the fuse by using the thermal effect and the electromagnetic effect of the short-circuit current: two pairs of electrodes respectively conduct positive current and negative current, when the fuse rear stage takes place positive and negative interelectrode short circuit, short circuit current will form the return circuit through inside two electrode branch roads of fuse and short circuit point, short circuit current makes junction conductor between conducting strip 7 generate heat fusing on the one hand, on the other hand, when short circuit current flows through two branch roads, will produce the electromagnetic force that becomes tangential direction with conducting strip 7, weak junction between conducting strip 7 is cut off, by two factor combined action, reach the purpose that makes the quick fusing of fuse.

Furthermore, two ends of the isolation insulation sheet 8 are respectively connected with the shell 6 through a tower 10, and a tower structure is arranged between the two poles in the fuse, so that the creepage distance between the positive and negative pole plates is increased, and the insulativity is improved.

The novel direct current fuse not only utilizes the thermal effect to fuse the melt in the fuse quickly, but also utilizes the electromagnetic force of current to accelerate the fracture of the conductor and the current column, thereby shortening the action time of the fuse.

Referring to fig. 4, when a short-circuit fault occurs between the positive and negative bus bars in the subsequent stage of the fuse, the short-circuit current Isc flow path is positive bus bar-fuse positive pole loop-short circuit point-fuse negative pole loop-negative bus bar. Firstly, Isc heats and melts or vaporizes a melt to form an electrical open circuit; secondly, because of the electromagnetic effect of the Isc, a tangential electromagnetic force Fem is generated in the diagram direction, and under the action of the force, the melt and a flow column generated by the melt are more easily cut off, and are accelerated to form an open circuit, so that the aim of quick fusing is fulfilled.

The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.