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Drop type fuse protector and installation tool thereof

A drop-type fuse and fuse technology, applied in emergency protection devices, electrical components, circuits, etc., can solve the problems of fuse relaxation, inconvenience in removing and re-hanging, affecting the reliability of power supply, etc. drop effect

Inactive Publication Date: 2017-10-03
大成电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the overall structure of various drop-out fuses currently on the market has great advantages and disadvantages, they all have the following common defects: First, when replacing the fuse tube, due to poor design of the fuse tube and operating tools, it may be removed. It is very inconvenient to hang it up again, and it often falls during the operation; second, when replacing the fuse, because the fuse rotates with the compression screw, the fuse is pulled tighter and tighter, causing the fuse to break. The fuse is easy to cause the fuse to loosen, and the replacement of the fuse becomes a "technical activity", which seriously affects the reliability of the power supply. Whether the contacts are in place after closing
[0003] Because the design ideas of dropout fuses are mainly dominated by foreign manufacturers, they generally do not know enough about China's national conditions, resulting in the above defects that have not been resolved for a long time

Method used

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  • Drop type fuse protector and installation tool thereof
  • Drop type fuse protector and installation tool thereof
  • Drop type fuse protector and installation tool thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 , 2 As shown in , 3, a dropout fuse includes a body 1 and a fuse tube 2, the body 1 includes an insulator 11 and an upper static contact 12 and a lower static contact 13 arranged at both ends of the insulator 11;

[0024] like Figure 4 , 5 , 6, the melting tube 2 includes a tube body 201, a fuse 202, an upper base 203, a lower base 204, an upper moving contact 205, and a lower moving contact 206, and the upper base 203 and the lower base 204 are set respectively At both ends of the tube body 201, the upper moving contact 205 is arranged on the upper base 203, and the lower moving contact 206 is connected to the lower base 204 through the swing arm 207, and the lower base 204 is provided with a ball head 208 and a limit angle 209. And the fuse fixing device 210, one end of the swing arm 207 is axially connected to the lower base 204, and the other end is axially connected to the fuse tensioning device, and the fuse tensioning device includes a locking e...

Embodiment 2

[0029] like figure 1 , 2 , 3, compared with Embodiment 1, in the present embodiment, the upper static contact 12 is also provided with a rainproof cover 14, the side of the rainproof cover 14, the side of the upper moving contact 205, Reflective blocks 15 are arranged on the side of the lower static contact 13 , the side of the lower moving contact 206 and the operation ring 214 .

[0030] More preferably, the upper static contact 12 is also provided with an arc extinguishing plate 16 , and the lower base 204 is also provided with a flow guide plate 17 .

Embodiment 3

[0032] like Figure 8 As shown, an operating tool is used to install the above-mentioned drop-out fuse, which includes an operating handle 31 and an operating head 32. The operating head 32 is provided with a transverse cross arm 321, and the cross arm 321 is provided with anti-slip lines or The anti-slip groove, the cross arm 321 can be inserted into the operation ring 214 on the upper base 203 of the drop-out circuit breaker, the end surface of the operating head 32 is provided with an arcuate groove 322, and the arcuate groove 322 is connected to the lower base 204 The ball head 208 on the top is matched, that is, the arc surface of the arc surface groove 322 can accommodate the ball head 208, so that when the melting tube 2 is hung on the arc surface groove 322 of the operating tool through the ball head 208, even if the operating tool and the melting tube There is a large angle change between the two, and the melting tube 2 will not fall.

[0033] The working principle o...

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Abstract

The invention relates to a drop type fuse protector. The drop type fuse protector comprises a body and a fusion tube, wherein the fusion tube comprises a tube body, a fuse wire, an upper base, a lower base, an upper moving contact and a lower moving contact, and also comprises a fuse wire tensioning device and a ball head, wherein the fuse wire tensioning device comprises a locking spring plate and a reset spring; a wire clamping groove is formed in one end of the locking spring plate, one end of the locking spring plate is folded, and the other end of the locking spring plate can clamp a limiting angle on the lower base; an operation ring is further arranged on the upper base; and a buckle is arranged at the end, connected with the fuse wire tensioning device, of the fuse wire. The drop type fuse protector is further provided with a reflector. The invention also relates to an operation tool, wherein the operation tool comprises a curved groove matched with the ball head. The curved groove is matched with the ball head, and the reflector is added, so that the drop type fuse protector can be convenient to install; and the fuse wire tensioning device can guarantee the safety of the fuse wire, so that the reliability of power supply is guaranteed.

Description

technical field [0001] The invention relates to a fuse, in particular to a drop-out fuse and an installation tool thereof. Background technique [0002] Dropout fuses are widely used in the control and protection of distribution transformers because of their low cost and easy maintenance. Although the overall structure of various drop-out fuses currently on the market has great advantages and disadvantages, they all have the following common defects: First, when replacing the fuse tube, due to poor design of the fuse tube and operating tools, it may be removed. It is very inconvenient to hang it up again, and it often falls during the operation; second, when replacing the fuse, because the fuse rotates with the compression screw, the fuse is pulled tighter and tighter, causing the fuse to break. The fuse is easy to cause the fuse to loosen, and the replacement of the fuse becomes a "technical activity", which seriously affects the reliability of the power supply. Whether t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/02H01H85/54
CPCH01H85/0208H01H85/54
Inventor 张仲
Owner 大成电气有限公司
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