CN209896020U

CN209896020U - Melt with ceramic-coated surface

Info

Publication number: CN209896020U
Application number: CN201920830064.2U
Authority: CN
Inventors: 南式荣; 杨漫雪; 李赟
Original assignee: Nanjing Sart Science and Technology Development Co Ltd
Current assignee: Nanjing Sart Science and Technology Development Co Ltd
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-01-03
Anticipated expiration: 2029-06-03

Abstract

The utility model discloses a melt with a ceramic-coated surface, which comprises a melt strip; the melt strip comprises a middle plate body and connecting parts positioned at two ends of the middle plate body; the ceramic layers are covered on the upper surface and the lower surface of the middle plate body, so that the bending resistance is better, the phenomenon that a melt is easy to bend or even break caused by manual operation can be effectively reduced, and the consistency of product performance and the product yield are improved; meanwhile, the ceramic layer can play a role in locally sealing the melt, and is more beneficial to prolonging the storage and service life of the product.

Description

Melt with ceramic-coated surface

Technical Field

The utility model relates to a fuse technical field.

Background

The fuse is a power system protection device which has long been developed and has wide application range. Because of its low cost, small volume, simple structure, stable performance, it has wide application in many fields. This also causes the fuse to be of various kinds, different in structure, difficult to realize automation, mainly by manual work. And the melt of the product with smaller rated current specification is extremely thin, so that the narrow-diameter part of the melt is easy to damage or even break by manual operation in small-batch production, the effective utilization rate of the melt is low, and the product yield and the manufacturing efficiency are further influenced.

The fuse production process generally includes: the method comprises the following steps of melt stamping, inner cap assembling, melt welding, outer cap assembling, sand filling, solidifying and printing. Generally, different current specifications correspond to different melt strip widths, melt throat patterns, and melt thicknesses. During the process of welding, sand filling and solidifying the melt, the melt is easily bent in the porcelain tube and damaged or even broken at the narrow diameter of the melt due to the instability of manual operation, so that the product performance is unstable and the product yield is low.

Chinese patent application CN 108630500 a proposes a method of solidifying the melt first, followed by welding and assembly. This method has a disadvantage that only partial curing is performed for saving the curing time, and uniform curing is not performed for the whole, resulting in a decrease in vibration reliability.

Disclosure of Invention

The purpose of the invention is as follows: the utility model discloses a surface covers porcelain fuse-element can improve the stability of quality and the production efficiency of fuse-element in the fuse. Especially a flake melt.

The technical scheme is as follows: in order to achieve the above object, the utility model discloses can adopt following technical scheme:

a surface-coated ceramic melt comprises a melt strip; the melt strip comprises a middle plate body and connecting parts positioned at two ends of the middle plate body, the middle plate body is provided with an upper surface and a lower surface which are opposite, and a plurality of slots penetrating through the upper surface and the lower surface are symmetrically formed in two sides of the middle plate body; the upper surface of the middle plate body is covered with an upper ceramic layer, and the lower surface of the middle plate body is covered with a lower ceramic layer.

Further, the connecting portion is not covered with the ceramic layer.

Further, the melt strip is a straight strip or a folded strip.

Furthermore, the contour of the slot is one of circular arc, triangle, wave, square and trapezoid.

Furthermore, the connecting part is bent relative to the middle plate body.

Has the advantages that: compared with the prior art, the melt provided by the utility model has better bending resistance by covering the ceramic layers on the upper and lower surfaces of the middle plate body, thereby effectively reducing the phenomenon that the melt is easy to bend or even break caused by manual operation, and improving the consistency of product performance and product yield; meanwhile, the ceramic layer can play a part in sealing the melt, and is particularly beneficial to prolonging the storage and service life of the product at the narrow-diameter position between the slots at the two sides.

Drawings

FIG. 1 is a schematic structural view of a melt strip in a surface-coated ceramic melt according to the present invention;

FIG. 2 is a schematic structural view of the surface-coated ceramic melt of the present invention;

fig. 3 is a state diagram when the connecting portion is bent.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail and completely in conjunction with 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a melt coated with porcelain on the surface, including a melt strip. The melt strip is a straight strip or a folded strip. The melt strip comprises a middle plate body 1 and connecting parts 2 positioned at two ends of the middle plate body 1. When the fuse element is mounted in the fuse, the connecting portions 2 at both ends are soldered to electrodes (not shown) of the fuse element to form electrical connections. The middle plate body 1 is provided with an upper surface and a lower surface which are opposite, a plurality of slots 11 penetrating through the upper surface and the lower surface are symmetrically formed on two sides of the middle plate body 1, and narrow diameters 14 with narrow widths are formed between the symmetrical slots 11. The upper surface of the intermediate plate body 11 is covered with an upper ceramic layer 12, and the lower surface of the intermediate plate body is covered with a lower ceramic layer 13. Since the connection portion 2 requires welding as described above, the connection portion 2 is not covered with a ceramic layer. The contour of the slot 11 is one of circular arc, triangle, wave, square and trapezoid, and the triangular slot 11 is adopted in this embodiment. As shown in fig. 3, the connecting portion 2 may be bent with respect to the middle plate 1 according to some assembling requirements.

The material selection and coating process of the ceramic layer in the embodiment can be realized by selecting mature materials and spraying processes commonly used for ceramic materials in the prior art. For example, the ceramic material may be Al₂O₃、ZrO₂、Cr₂O₃One or more of metal ceramic, silicide ceramic and boride ceramic, and the coating form comprises a single coating, a composite coating and the like. The coating process can be selected from plasma spraying, flame spraying, supersonic spraying and other thermal spraying processes, vapor deposition, thermochemical reaction methods and other processes. Since all the techniques are prior art, they are not described herein again.

And the utility model provides a surface covers porcelain fuse-element and directly uses the fuse-element that the punching press was made to compare and has following advantage:

1. the bending resistance is better, the phenomenon that the melt is easy to bend and even break caused by manual operation can be effectively reduced, and the consistency of product performance and the product yield are improved;

2. the ceramic layer can play a local sealing role on the melt, and is particularly beneficial to prolonging the storage and the service life of the product at a narrow diameter.

Claims

1. The surface ceramic-coated melt is characterized by comprising a melt strip; the melt strip comprises a middle plate body and connecting parts positioned at two ends of the middle plate body, the middle plate body is provided with an upper surface and a lower surface which are opposite, and a plurality of slots penetrating through the upper surface and the lower surface are symmetrically formed in two sides of the middle plate body; the upper surface of the middle plate body is covered with an upper ceramic layer, and the lower surface of the middle plate body is covered with a lower ceramic layer.

2. The surface-ceramic-coated melt of claim 1, wherein the connecting portion is not covered with a ceramic layer.

3. The surface-porcelain-clad melt of claim 1, wherein the melt strip is a straight strip or a folded strip.

4. The surface-ceramic-coated melt of claim 1, 2 or 3, wherein the contour of the slot is one of circular arc, triangular, wavy, square and trapezoidal.

5. The surface-ceramic-coated melt body of claim 1, wherein the connecting portion is disposed at a bend with respect to the intermediate plate body.