KR20190064164A - High voltage fuse - Google Patents

Abstract

The present invention relates to a high-voltage fuse. A housing (10) forms the exterior of the fuse according to the present invention. An inner space (12) is formed inside the housing (10). A fuse element (20) is installed in the inner space (12). The fuse element (20) has mounting plates (21) on both ends thereof and a plurality of fusing portions (26) connecting the mounting plates (21). A first cap (30) having a first terminal portion (32) or a second terminal portion (30′), and a second cap (30′) are coupled to the mounting plates (21). A plurality of blocking members (42) are installed in the inner space (12) of the housing (10). The blocking members (42) are made of water glass and have a rod shape. The blocking members (42) block heat generated by the fusing portions (26) from affecting the housing (10) or the like. The present invention can effectively block heat from being transferred to a housing.

Description

High voltage fuse

The present invention relates to a high voltage fuse, and more particularly to a high voltage fuse having a water glass member capable of absorbing a thermal shock when used at a high voltage.

The fuse protects the load by blocking the overcurrent on the circuit. To this end, the fuse is provided with a fusing element in the fuse element, which is a conductor, and melts and breaks due to the overcurrent in the fusing part, thereby blocking the overcurrent.

In the elements of the fuse used at a high voltage, high temperature heat is generated. Such heat damages the housing constituting the appearance and disadvantageously makes it impossible to properly manage the time at which the melting portion melts and breaks.

A cylindrical sleeve is generally used to prevent the housing from being damaged by the heat generated at the fusing part. The sleeve is made of ceramic to prevent the transmission of sparks and thermal shocks to the housing. However, it is difficult to make the sleeve into a cylindrical shape due to poor workability, and merely functions to block heat transmitted to the housing.

In the high-voltage fuse, the socket for filling the spark generated in the fusing part is filled in the inner space of the housing. In addition, since the space for filling the socket is wider, filling operation is relatively cumbersome and takes a lot of time.

Japanese Patent Laid-Open No. 1993-075730 Japanese Patent Laid-Open No. 2005-135845

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to absorb a thermal shock generated from a fusing end of a fuse element in a fuse used at a high voltage so as not to affect the housing.

Another object of the present invention is to make a heat-generating end member made of water glass into a rod shape and to easily manufacture the fuse while ensuring accurate operation performance of the fuse.

It is a further object of the present invention to more uniformly fill the inner space of the housing with the soot making the soaking action.

According to an aspect of the present invention for achieving the above object, the present invention provides a fuse assembly comprising: a housing having an inner space opened at both ends; a fuse element positioned in the inner space and having a fusing end; A first terminal portion and a second terminal portion which are electrically connected to both ends of the fuse element and are protruded to the outside of the housing and connected to the circuit; And a blocking member that is formed of a water glass and absorbs heat generated at the free end portion.

The blocking member is formed into a bar shape.

The first terminal is integrally formed with the first cap, and the second terminal is integrally formed with the second cap.

The fuse element includes a mounting plate coupled to the first cap and the second cap at both ends thereof, and a plurality of fusing parts are provided to connect the mounting plates.

At both ends of the free end portion, a coupling piece is formed and coupled to a coupling surface formed on the mounting plate.

The first cap and the second cap have mounting grooves on which the mounting plates are seated. The mounting grooves are provided with a plurality of fastening protrusions for fastening with the mounting plate.

The first cap and the second cap are provided with clogging plates for closing both ends of the housing. The clogging plate of the first cap is formed with a through-hole for pouring the lather into the inner space.

The following effects can be obtained in the high-voltage fuse according to the present invention.

First, in the present invention, since the heat end member made of a water glass is arranged around the inner surface of the inner space of the housing, the heat generated in the heating end can be effectively prevented from being transmitted to the housing. Therefore, it is possible to increase the durability of the fuse by blocking the thermal shock from the housing, more effectively absorb the heat generated at the fusing part, and control the fusing performance of the fusing part, thereby improving the operating characteristic of the fuse.

According to the present invention, if the heat terminal member is made into a rod shape, it is relatively easy to manufacture due to the characteristics of the material of the water glass, thereby simplifying the manufacturing process of the components constituting the fuse.

In addition, in the present invention, the heat shield member is formed into a bar shape to guide the fire extinguisher in the process of filling the fire extinguisher in the internal space of the housing, and at the same time, So that it is easier and more effective to fill the inner space of the main body with the soother.

1 is a perspective view showing a fuse according to a preferred embodiment of the present invention.
2 is an exploded perspective view showing a configuration of an embodiment of the present invention.
3 is a cross-sectional perspective view showing an internal configuration of an embodiment of the present invention.
4 is a perspective view showing a fuse element constituting an embodiment of the present invention.
5 is a perspective view showing a second cap constituting an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the understanding why the present invention is not intended to be interpreted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

According to the drawings, the housing 10 forms the appearance of the fuse of the embodiment of the present invention. The housing 10 is made of an insulating synthetic resin. The housing 10 is formed into a cylindrical shape, and an inner space 12 formed therein is opened to both ends of the housing 10. [ An inlet of the inner space 12 is formed by the first end portion 14 and the second end portion 16 which are both ends of the housing 10. A plurality of engaging holes 18 are formed so as to surround the outer circumferential surfaces of the second end portion 14 and the second end portion 16 of the housing 10. A coupling pin 40 to be described below is inserted into the through hole 18 so that the first cap 30 and the second cap 30 'described below are coupled to the housing 10.

A fuse element 20 is installed in the inner space 12 of the housing 10. At both ends of the fuse element 20, a mounting plate 21 is provided. The mounting plate 21 is made of a conductive metal material. The mounting plate 21 has the same configuration as a hexahedron having an approximately open surface. The mounting plate 21 is formed with a plurality of fastening holes 24 for engagement with the first cap 30 or the second cap 30 ', which will be described below. A coupling surface (22) is formed on each of the slopes of the mounting plate (21). The engaging surface 22 is engaged with the engaging piece 28 of the fusing end 26 to be described below.

A plurality of free ends 26 are provided between the engaging surfaces 22 of the mounting plate 21. The distal end portion 26 is formed of a strip-shaped metal plate, and melts and breaks when an overcurrent flows. The shape of the distal end 26 can be varied. In this embodiment, the free end 26 is formed into a sinusoidal shape when viewed from the side. At both ends of the free end 26, there is a coupling piece 28. The engaging piece 28 is joined to the engaging surface 22 by, for example, blazing welding. The distal end portion 26 is also made of a conductive metal material such as the mounting plate 21.

At both ends of the fuse element 20, a first cap 30 and a second cap 30 'are integrally formed. The first cap 30 and the second cap 30 'are formed separately from the fuse elements 20, particularly the mounting plate 21, but are integrally fastened to each other. The first cap 30 and the second cap 30 'are made of a conductive metal.

A first terminal (32) is formed on the first cap (30). The first terminal 32 is formed with a fastening hole 33 for passing a bolt therethrough. A second terminal 32 'is formed on the second cap 30' and a fastening hole 33 'is formed on the second terminal 32'.

The first cap 30 and the second cap 30 'are provided with blocking plates 34 for blocking the openings of the first end 14 and the second end 16 of the housing 10. The blocking plate 34 is formed in the shape of a disk having the same cross-sectional shape as the housing 10. A coupling hole 35 is formed at a position corresponding to the coupling hole 18 of the housing 10 surrounding the outer periphery of the blocking plate 34.

Mounting grooves 36 are formed on the surfaces of the first and second caps 30 and 30 'facing the inner space 12 of the housing 10, respectively. A part of the mounting plate 21 is located in the mounting groove 36. A plurality of fastening protrusions 38 are formed in the mounting groove 36 to penetrate through the fastening holes 24 of the mounting plate 21 to connect the mounting plate 21 and the first cap 30 or the second cap 30 ') To each other.

The through hole (39) is formed through the barrier plate (34) of the first cap (30). The through hole 39 serves as a passage through which the SOHO yarn is injected into the inner space 12 of the housing 10. In this embodiment, two through holes 39 are formed. The through hole 39 is closed by a cap 39 '. In a state in which the stopper 39 'is not provided, the center pin 39 is inserted into the inner space 12 through the through hole 39 and the stopper 39' is closed with the stopper 39 'when the injection of the pinion is completed.

A coupling pin 40 is used for coupling the housing 10 with the first cap 30 and the second cap 30 '. The coupling pin 40 is engaged with the coupling hole 40 of the housing 10 18 and is fastened to the coupling hole 35 of the first cap 30 or the second cap 30 '. A threaded portion may be formed on the outer circumferential surface of the coupling pin 40 so as to be fastened to a threaded portion formed on the inner surface of the coupling hole 18, 35. Of course, the engaging pin 40 may be press-fitted into the engaging holes 18 and 25 to perform a fastening action.

A plurality of blocking members 42 surrounding the edges of the inner space 12 of the housing 10 are provided. The blocking member 42 has both end portions seated in a seating groove formed in the blocking plate 34 of the first and second caps 30 and 30 'so that the first and second caps 30 and 30' ). ≪ / RTI > The blocking member 42 is formed into a bar shape in this embodiment. The blocking member 42 is made of water glass, and the heat absorbing property is good due to the characteristics of the material. As the blocking member 42 smoothly absorbs heat, it is possible to minimize the transfer of heat generated in the free end 26 to the housing 10 and the like.

Hereinafter, the high voltage fuse according to the present invention having the above-described structure will be described in detail.

 In the present invention, the fuse elements 20 are connected in parallel by the mounting plate 21 with a plurality of terminal ends 26. The first and second caps 30 and 30 'are mounted on both ends of the fuse element 20. To this end, the fastening holes 24 of the mounting plate 21 are passed through the fastening protrusions 38 of the first cap 30 or the second cap 30 ', and the diameter of the fastening protrusions 38 So that the mounting plate 21, the first cap 30 and the second cap 30 'are engaged with each other. The first terminal 32 and the second terminal 32 'are protruded from opposite ends of the fuse element 20 in opposite directions.

At this time, the blocking member 42 is installed between the first cap 30 and the blocking plate 34 of the second cap 30 '. A plurality of the blocking members 42 are installed at predetermined intervals. The number of the blocking members 42 depends on the design conditions such as the capacity of the fuse.

The blocking member 42 is installed in a state in which the mounting plate 21 of the fuse element 20 is coupled to the second cap 30 ' The plate 34 is provided with the blocking member 42 by using a jig. The blocking plate 34 of the first cap 30 is engaged with the opposite end of the blocking members 42 while the blocking member 42 is installed. At this time, the end portions of the blocking members 42 corresponding to the through holes 39 are positioned at the entrance of the through holes 39. The diameter of the blocking member 42 is smaller than the inner diameter of the through hole 39, thereby blocking only a part of the through hole 39.

Next, the assembly is inserted into the inner space 12 of the housing 10. At this time, the fuse elements 20 are located in the inner space 12 and the first and second caps 30 and 30 'are located at the openings of the opposite ends 14 and 16 of the housing 10 . In this state, the blocking plates 34 close the openings on both sides of the inner space 12 of the housing 10, respectively. The first terminal 32 and the second terminal 32 'protrude outward on both sides of the housing 10.

Next, the side of the first cap 30 with the through hole 39 is positioned above the gravity direction, and the small hole is injected into the inner space 12 through the through hole 39. The SOHO injected through the through hole 39 is guided along the blocking member 42 and enters the inner space 12. At this time, the SOHO is guided along the blocking member 42 to the inner space 12 in which the blocking members 42 are disposed at regular intervals. It is necessary to apply a certain degree of vibration to the housing 10 in the process of filling the inner space 12 of the housing 10 with the softener.

When the small space is filled in the inner space 12, the through hole 39 'is closed with the stopper 39'. In this way, the assembly of the fuse of the present invention is completed. Additional post-operations can be performed if necessary.

The completed fuse connects the first terminal portion 32 and the second terminal portion 32 'to the circuit. For example, the power source side and the first terminal portion 32 are connected, and the load side and the second terminal portion 32 'are connected to each other. When power is supplied to the circuit in this state, current flows through the first terminal portion 32, the mounting plate 21, the plurality of terminal ends 26, the opposite mounting plate 21 and the second terminal portion 32 ' .

A large amount of heat is generated in the fusing part 26 during use of the fuse. When the overcurrent flows, the distal end 26 melts and breaks. The heat generated from the free end 26 can be transmitted to the blocking member 42 through the louver 40. The blocking member 42 is capable of absorbing heat and is generated in the free end 26, Absorbing heat to be prevented from being transmitted to the housing 10. Therefore, the heat generated from the free end 26 can be continuously transmitted to the blocking member 42 without staying in the free end 26, thereby preventing the free end 26 from being continuously influenced by heat. can do.

The spark generated during the melting process of the free end portion 26 due to the overcurrent is minimized by the small burner and the heat generated when the spark is generated is also absorbed by the blocking member 42, The damper 10 can be prevented from being damaged.

While the present invention has been described in connection with what is presently considered to be the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

For example, in the illustrated embodiment, the fuse elements 20 are in the form of a plurality of fused ends 26 connected in parallel, but this is not necessarily the case. Only one fusible end 26 may be present in the fuse element 20.

10: housing 12: inner space
14: first end 16: second end
18: Coupling hole 20: Fuse element
21: mounting plate 22: coupling surface
24: fastening hole 26:
28: engaging piece 30: first cap
30 ': second cap 32: first terminal portion
32 ': second terminal portion 33: first fastening hole
33 ': second fastening hole 34: blocking plate
35: engaging hole 36: mounting groove
38: fastening protrusion 39: through hole
39 ': Marge 40: Binding pin
42:

Claims (7)

A housing having an inner space open to both ends,
A fuse element located in the inner space and having a fusing part;
A first cap and a second cap for shielding the opened inner space at both ends of the housing,
A first terminal portion and a second terminal portion electrically connected to both ends of the fuse element and protruding outside the housing to be connected to the circuit,
And a blocking member disposed at a plurality of positions surrounding the fuse element in the inner space and made of waterglass to absorb heat generated at the fusing part.
The high voltage fuse according to claim 1, wherein the blocking member is made of a rod.
The high-voltage fuse according to claim 2, wherein the first terminal is integrally formed with the first cap, and the second terminal is integrally formed with the second cap.
The fuse according to any one of claims 1 to 3, wherein the fuse element includes a mounting plate coupled to the first cap and the second cap at both ends thereof, and a high-voltage fuse having a plurality of terminal ends for connecting between the mounting plates, .
5. The high-voltage fuse according to claim 4, wherein coupling ends are formed at both ends of the fusing part to engage with coupling surfaces formed in the fitting plate.
[6] The apparatus of claim 5, wherein the first cap and the second cap have mounting grooves on which the mounting plates are seated, the mounting grooves having a plurality of fastening protrusions for fastening with the mounting plate, fuse.
[7] The apparatus as claimed in claim 6, wherein the first cap and the second cap are provided with blocking plates for closing both ends of the housing, and a through-hole for injecting the soot into the inner space is provided in the blocking plate of the first cap, High voltage fuse.

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