Fuse housing and fuse

Abstract

The utility model discloses a fuse housing and a fuse, and belongs to the field of circuit protection devices. The shell comprises an inner shell and an outer shell, the outer shell is provided with a containing cavity, the inner shell is of a tubular structure, the inner shell is attached to the inner wall of the outer shell, the inner shell is made of high-temperature-resistant and impact-resistant materials, and the outer shell is made of ceramic materials. According to the utility model, the inner shell made of the high-temperature-resistant and impact-resistant material is attached to the outer shell, so that the probability that the shell bursts and sprays arcs due to internal impact can be reduced, and the problem that large-area electrical equipment is damaged due to the fact that the shell in the prior art is prone to bursting and spraying arcs due to internal impact is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of circuit protection devices, specifically a fuse housing and a fuse. Background Technology

[0002] In the prior art, a fuse consists of a housing and a fusible element. The fusible element is located inside the housing. It is a device that breaks the circuit by disconnecting the current after a certain period of time when the current exceeds a specified value. In the prior art, the housing is generally made of ceramic material. When the fusible element melts and burns, it generates a huge impact, which can easily cause the housing to burst and cause large-area damage to electrical equipment. Utility Model Content

[0003] The purpose of this utility model is to provide a fuse housing and a fuse, wherein the inner shell, made of high-temperature resistant and impact-resistant material, is attached to the outer shell, which can reduce the probability of the housing bursting and arcing due to internal impact, and solve the problem that the housing of the prior art is easily bursted and arced due to internal impact, causing large-area damage to electrical equipment.

[0004] The technical solution of this utility model is as follows: Firstly, a fuse housing includes an inner shell and an outer shell.

[0005] The outer shell has a receiving cavity, and the inner shell is a tubular structure.

[0006] The inner shell is fitted to the inner wall of the outer shell.

[0007] The inner shell is made of a high-temperature resistant and impact-resistant material, while the outer shell is made of ceramic.

[0008] In a further embodiment of the first aspect, the high-temperature resistant and impact-resistant material includes one of melamine material and epoxy glass fiber material. When the high-temperature resistant and impact-resistant material is melamine material, the inner shell of melamine can also generate arc-quenching gas to reduce the accident rate when an electric arc is generated, causing the melamine to decompose at high temperature.

[0009] In a further embodiment of the first aspect, the wall thickness of the inner shell is between 2 and 6 mm.

[0010] In a further embodiment of the first aspect, the wall thickness of the inner shell is between 3 and 5 mm.

[0011] In a further embodiment of the first aspect, the inner shell is bonded to the inner wall of the outer shell, which can ensure the connection strength between the inner shell and the outer shell and facilitate subsequent assembly.

[0012] In a further embodiment of the first aspect, the inner shell is bonded to the inner wall of the outer shell by epoxy resin.

[0013] In a further embodiment of the first aspect, the inner shell and the outer shell are flush at their ends.

[0014] In a second aspect, a fuse includes: a contact blade, a fusible element, a cover plate, an arc-extinguishing medium, and the housing described in the first aspect.

[0015] The melt is installed between two contact blades, the two contact blades are respectively installed on two cover plates, the two cover plates are respectively installed at both ends of the housing, and the melt and the arc extinguishing medium are disposed inside the housing.

[0016] In a further embodiment of the second aspect, the fuse includes a sealing gasket disposed between the cover plate and the housing.

[0017] In a further embodiment of the second aspect, the fuse includes at least one fusible element.

[0018] The beneficial effects of this utility model are as follows: This application uses an inner shell made of high-temperature resistant and impact-resistant melamine material or epoxy glass fiber material to adhere to the outer shell. When an electric arc is generated and the circuit breaker's internal structure impacts the outer shell, the inner shell made of high-temperature resistant and impact-resistant material can withstand the internal impact, reducing the impact on the ceramic outer shell. This reduces the probability of the outer shell bursting and arcing due to internal impact, and solves the problem of the existing technology where the outer shell is easily damaged by internal impact and arcing, causing large-area damage to electrical equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded casing of this utility model.

[0020] Figure 2 This is a schematic diagram of the fuse of this utility model in explosion.

[0021] Figure 3 This is a cross-sectional schematic diagram of the fuse of this utility model.

[0022] The attached figures are labeled as follows: outer shell 1, inner shell 2, contact blade 3, melt 4, cover plate 5, arc extinguishing medium 6, and sealing gasket 7. Detailed Implementation

[0023] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0024] A fuse housing and fuse are disclosed. The inner shell, made of high-temperature resistant and impact-resistant material, is attached to the outer shell. When an electric arc is generated and the circuit breaker's interior impacts the housing, the inner shell can withstand the internal impact, reducing the impact on the ceramic outer shell. This reduces the probability of the housing bursting and arcing due to internal impact, solving the problem of existing technology where the housing is easily bursted and arced due to internal impact, causing large-area damage to electrical equipment.

[0025] Firstly, the housing includes: an inner shell 2 and an outer shell 1.

[0026] like Figure 1 The outer shell 1 shown has a receiving cavity, and the inner shell 2 is a tubular structure.

[0027] The inner shell 2 is attached to the inner wall of the outer shell 1.

[0028] The inner shell 2 is made of high-temperature resistant and impact-resistant material, and the outer shell 1 is made of ceramic material. The high-temperature resistant and impact-resistant material includes either melamine or epoxy fiberglass.

[0029] Regarding inner shell 2, the wall thickness of inner shell 2 is between 2 and 6 mm.

[0030] In a preferred embodiment, the wall thickness of the inner shell 2 is between 3 and 5 mm.

[0031] Generally, a wall thickness of ≥2mm for the inner shell 2 is sufficient to allow the melamine inner shell 2 to withstand impacts and reduce the impact on the ceramic outer shell 1. However, a wall thickness of >6mm for the inner shell 2 would lead to increased costs and waste. A wall thickness of 3~5mm for the inner shell 2 can balance the above effects and production costs. Furthermore, a wall thickness of 3mm is preferred for the inner shell 2.

[0032] In this embodiment, the inner shell 2 is bonded to the inner wall of the outer shell 1. The inner shell 2 is bonded to the inner wall of the outer shell 1 using epoxy resin, wherein the bonding material includes, but is not limited to, epoxy resin.

[0033] In this embodiment, the inner shell 2 is flush with the end of the outer shell 1, that is, the inner shell 2 and the inner wall of the outer shell 1 are at the same height, so that the inner shell 2 and the inner wall of the outer shell 1 are fully fitted, which can provide more protection for the outer shell 1.

[0034] Regarding casing 1, as Figure 1 The outer shell 1 shown is a cuboid, with adjacent sidewalls connected by arc-shaped surfaces, and the cuboid has a receiving cavity that extends through both ends.

[0035] Secondly, the fuse includes: a contact blade 3, a fusible element 4, a cover plate 5, an arc-extinguishing medium 6, and the housing described in the first aspect.

[0036] The melt 4 is installed between two contact blades 3, which are respectively installed on two cover plates 5. The two cover plates 5 are respectively installed at both ends of the shell. The melt 4 and the arc-extinguishing medium 6 are disposed inside the shell. The arc-extinguishing medium 6 can be a material such as quartz sand. The contact blades 3 can be installed on the cover plates 5 by bolts, or as... Figure 2 The contact blade 3 is inserted into the cover plate 5 via an insert-type structure, as shown.

[0037] In this embodiment, the fuse includes a sealing gasket 7, which is disposed between the cover plate 5 and the housing, thereby improving the sealing performance at the connection between the cover plate 5 and the housing.

[0038] In this embodiment, the fuse includes: at least one fusible element 4, such as Figure 1 The diagram shows two columns of melts 4, with four melts 4 in each column.

[0039] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A fuse housing, characterized in that, include: Inner shell and outer shell; The outer shell has a receiving cavity, and the inner shell has a tubular structure; The inner shell is fitted to the inner wall of the outer shell; The inner shell is made of a high-temperature resistant and impact-resistant material, while the outer shell is made of ceramic.

2. The fuse housing according to claim 1, characterized in that, The high-temperature resistant and impact-resistant material includes one of the following: melamine material and epoxy glass fiber material.

3. A fuse housing according to claim 2, characterized in that, The wall thickness of the inner shell is between 2 and 6 mm.

4. A fuse housing according to claim 3, characterized in that, The wall thickness of the inner shell is between 3 and 5 mm.

5. A fuse housing according to claim 1, characterized in that, The inner shell is bonded to the inner wall of the outer shell.

6. A fuse housing according to claim 5, characterized in that, The inner shell is bonded to the inner wall of the outer shell with epoxy resin.

7. A fuse housing according to claim 1, characterized in that, The inner shell and the outer shell are flush at their ends.

8. A fuse, characterized in that, include: The contact blade, the melt, the cover plate, the arc-extinguishing medium, and the housing as described in any one of claims 1-7; The melt is installed between two contact blades, the two contact blades are respectively installed on two cover plates, the two cover plates are respectively installed at both ends of the housing, and the melt and the arc extinguishing medium are disposed inside the housing.

9. A fuse according to claim 8, characterized in that, include: A sealing gasket is disposed between the cover plate and the housing.

10. A fuse according to claim 8, characterized in that, include: At least one melt.

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