Fully-insulated and fully-sealed solid-cabinet fuse tube

Abstract

The invention discloses a fully-insulated and fully-sealed solid-cabinet fuse tube. The fully-insulated and fully-sealed solid-cabinet fuse tube comprises a tube body and a connecting part, wherein a guiding component is fixedly mounted inside the inner cavity of the tube body; a plurality of guiding holes are formed in the guiding component; at least one lattice bar capable of axially moving along the guiding hole is arranged inside each guiding hole; an elastic component or an oppositely-homopolar magnetic component is further arranged inside the inner cavity of the tube body; one end of the elastic component or the magnetic component is in contact with the top of the inner cavity of the tube body, and the other end of the elastic component or the magnetic component is in contact with the lattice bar; when the fuse tube is not in use, the upper end part of the lattice bar is propped against the upper surface of the guiding component under the action of the elastic component or the oppositely-homopolar magnetic component. The fully-insulated and fully-sealed solid-cabinet fuse tube is simple in structure, low in cost, and stable and reliable in working state, saves the space, can assemble and disassemble tightening components with different specifications and cover all the tightening components, and can meet a using requirement; in an aspect of matching with other tools, through a standard interface, the fully-insulated and fully-sealed solid-cabinet fuse tube is also applicable for connecting parts of almost all the existing electric wrenches, pneumatic wrenches and manual wrenches, so that the application range of the fully-insulated and fully-sealed solid-cabinet fuse tube is widened and the adaptability of the fully-insulated and fully-sealed solid-cabinet fuse tube is improved.

Description

technical field [0001] The invention relates to high-voltage electrical equipment, in particular to solid insulation switchgear in high-voltage electrical products. Background technique [0002] With the State Grid's efforts to promote solid insulated switch products in recent years, manufacturers of solid insulated products on the market have gradually increased, but there are still many defects in the load switch combination electrical unit of the product, resulting in solid insulated load switch combination The reason for the problem of the electrical unit is the fuse box. The main problems of the solid cabinet fuse box products on the market are as follows: [0003] 1. The auxiliary grounding of the fuse cartridge is insulated by air, resulting in a large product with complex structure and difficult to uniform electric field distribution, and the auxiliary grounding knife is not fully sealed, which is easily affected by dust, water vapor and condensation. [0004] 2. Th...

AI Technical Summary

Problems solved by technology

[0003] 1. The auxiliary grounding of the fuse cartridge is insulated by air, resulting in a large product size, complex structure, and difficult uniform distribution of the electric field, and the auxiliary grounding knife is not fully sealed, which is easily affected by dust, water vapor and condensation

[0004] 2. The auxiliary grounding is insulated by transformer oil, and the structure is also complicated. During the assembly process, it takes a lot of time and manpower to deal with the problem of sealing performance, and the oil insulation is greatly affected by the temperature. Once there is a problem with the sealing and oil quality , will cause fatal damage to the product and the product cannot be used in severe cold regions

[0005] 3. When the fuse barrel cover is installed, the fuse is not supported in the fuse barrel, which may easily cause the fuse to not be in place after installation and the contact between the fuse and the plum blossom contact is poor, and it needs to be pulled out repeatedly before installation.

[0006] 4. The insulation method between the fuse cartridge cover and the conductive parts of the fuse cartridge adopts a circular extrusion insulation method. This method has a large extrusion force and laborious installation. After installation, there is a gap between the fuse cartridge cover and the fuse cartridge. Squeeze the uneven interface. This kind of interface will generate large partial discharge when the product is running. It belongs to the type of bubble discharge. Long-term discharge will cause the product insulation to age rapidly, and the long-term operation of the product has potential safety hazards.

[0007] 5. The fuse cartridge is installed vertically and obliquely. Although it saves space, when the product is running or when the fuse tube is installed and replaced, the water vapor accumulated at the installation port of the fuse cartridge due to condensation and humidity will flow into the fuse cartridge. Inside the fuse cartridge, it is not easy to be noticed and found, resulting in electrical insulation and product safety accidents

[0008] 6. For the application scheme, only European-style cable joints or American-style cable joints can be used alone. Unless multiple sets of molds are made, it cannot meet the requirements of users in different regions

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