An extractable load switch, fuse combination appliance

Abstract

The utility model discloses a kind of extractable load switch, fuse combination electrical apparatus, including insulating pole, fuse is arranged in the insulating pole, vacuum bubble, the vacuum bubble includes ceramic shell, and shielding cover is arranged in ceramic shell, the shielding cover includes cover body and sleeve portion being arranged at the both ends of cover body, the sleeve portion is used for static conducting rod and dynamic conducting rod are loaded, one end of the static conducting rod is connected with static contact, one end of the dynamic conducting rod is connected with dynamic contact, the outer wall surface of the shielding cover is provided with magnetic element, the magnetic element is distributed on the circumferential direction of the outer wall surface.The utility model has the beneficial effects that: the magnetic field generated by magnetic element enhances arc control ability, reduces the risk of re-ignition;Opening simplifies contact assembly process, reduces the possibility of pollution;Annular magnet and shielding cover integration design avoid magnetic field deviation.

Description

Technical Field

[0001] This utility model relates to the field of power switchgear technology, specifically to a withdrawable load switch and fuse combination appliance, and particularly to the optimized design of the shielding cover structure. Background Technology

[0002] Traditional load switch and fuse combination appliances have the following problems: the vacuum interrupter shielding cover only adsorbs metal vapor through physical structure, which is inefficient; the contact installation requires disassembly of the shielding cover, which is complicated and easy to introduce pollution; uneven magnetic field distribution leads to limited arc diffusion and unstable arc extinguishing performance. Summary of the Invention

[0003] The purpose of this utility model is to provide a removable load switch and fuse combination appliance to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A removable load switch and fuse combination appliance, characterized in that it includes an insulating pole, in which a fuse and a vacuum bulb are disposed, the vacuum bulb includes a ceramic shell and a shielding cover disposed within the ceramic shell, the shielding cover includes a cover body and sleeve portions disposed at both ends of the cover body, the sleeve portions are used for inserting a stationary conductive rod and a moving conductive rod, one end of the stationary conductive rod is connected to a stationary contact, one end of the moving conductive rod is connected to a moving contact, and the outer wall surface of the shielding cover is provided with magnetic elements, the magnetic elements being distributed in the circumferential direction of the outer wall surface.

[0006] The present invention further provides that the shielding cover is provided with at least one opening for installing the moving contact and the stationary contact into the shielding cover.

[0007] The present invention further provides that the magnetic element is a ring magnet, and the protrusion on the ring magnet is used to fit the opening, and the ring is mounted on the outer wall of the shielding cover through the opening and the protrusion.

[0008] The present invention further provides that the surface of the magnetic element is covered with an arc-resistant insulating coating.

[0009] The beneficial effects of this invention are: the magnetic field generated by the magnetic element enhances the arc control capability and reduces the risk of reignition; the opening simplifies the contact assembly process and reduces the possibility of contamination; the integrated design of the ring magnet and the shielding cover avoids magnetic field deviation. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0011] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0012] Figure 2 This is a perspective view of the shielding cover according to an embodiment of the present utility model.

[0013] Figure 3 This is a schematic diagram of the shielding cover in an embodiment of the present invention.

[0014] Reference numerals: 10, insulating pole; 20, fuse; 30, vacuum bulb; 40, shielding cover; 401, cover body; 402, sleeve part; 403, magnetic element; 4031, protrusion; 404, opening; Detailed Implementation

[0015] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0016] like Figure 1-3 As shown, this utility model is a removable load switch and fuse combination electrical appliance, including an insulating pole, in which a fuse and a vacuum bulb are disposed. The vacuum bulb includes a ceramic shell and a shielding cover disposed inside the ceramic shell. The shielding cover includes a cover body and sleeve portions disposed at both ends of the cover body. The sleeve portions are used to install a stationary conductive rod and a moving conductive rod. One end of the stationary conductive rod is connected to a stationary contact, and one end of the moving conductive rod is connected to a moving contact. Magnetic elements are disposed on the outer wall surface of the shielding cover, and the magnetic elements are distributed in the circumferential direction of the outer wall surface.

[0017] This invention further includes a shielding cover with at least one opening for installing the moving and stationary contacts inside the shielding cover. When two openings are provided, they are symmetrically arranged. The inner diameter of the sleeve portion of the shielding cover (made of oxygen-free copper) is fitted with the stationary / moving conductive rod with a clearance fit (tolerance ±0.1mm).

[0018] The magnetic element is a ring magnet, and the protrusion on the ring magnet is used to fit the opening, and the ring is installed on the outer wall of the shielding cover through the opening and the protrusion.

[0019] The opening consists of two symmetrical rectangular holes, each measuring 15mm × 8mm. The inner wall of the ring magnet (made of neodymium iron boron) has a protrusion, the thickness of which matches the depth of the opening. The magnet is then fitted into the opening via hot pressing.

[0020] In this embodiment, the surface of the magnetic element is covered with an arc-resistant insulating coating.

[0021] The magnetic element of this invention generates a magnetic field that enhances arc control and reduces the risk of reignition; the opening simplifies the contact assembly process and reduces the possibility of contamination; the integrated design of the annular magnet and the shielding cover prevents magnetic field deviation.

[0022] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0023] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0024] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A withdrawable load switch and fuse combination appliance, characterized in that, The device includes an insulating pole, in which a fuse and a vacuum bulb are disposed. The vacuum bulb includes a ceramic shell and a shielding cover disposed within the ceramic shell. The shielding cover includes a cover body and sleeve portions disposed at both ends of the cover body. The sleeve portions are used to insert a stationary conductive rod and a moving conductive rod. One end of the stationary conductive rod is connected to a stationary contact, and one end of the moving conductive rod is connected to a moving contact. Magnetic elements are disposed on the outer wall surface of the shielding cover, and the magnetic elements are distributed in the circumferential direction of the outer wall surface.

2. The withdrawable load switch and fuse combination appliance according to claim 1, characterized in that, The shielding cover is provided with at least one opening for installing the moving contact and the stationary contact into the shielding cover.

3. The withdrawable load switch and fuse combination electrical appliance according to claim 2, characterized in that, The magnetic element is a ring magnet, and the protrusion on the ring magnet is used to fit the opening, and the ring is installed on the outer wall of the shielding cover through the opening and the protrusion.

4. A withdrawable load switch and fuse combination appliance according to claim 3, characterized in that, The surface of the magnetic element is covered with an arc-resistant insulating coating.

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