CN201549457U - Fuse-type falling safety device - Google Patents
Fuse-type falling safety device Download PDFInfo
- Publication number
- CN201549457U CN201549457U CN2009202243233U CN200920224323U CN201549457U CN 201549457 U CN201549457 U CN 201549457U CN 2009202243233 U CN2009202243233 U CN 2009202243233U CN 200920224323 U CN200920224323 U CN 200920224323U CN 201549457 U CN201549457 U CN 201549457U
- Authority
- CN
- China
- Prior art keywords
- fuse
- mounting bracket
- fusion tube
- point line
- safety device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a fuse-type falling safety device which comprises an insulation body, a mounting bracket and a fusion tube; a low melting-point line is arranged between elastic pieces on the upper and lower ends of the mounting bracket inside the fusion tube, and the low melting-point line is shorter than a fuse. In the utility model, as the low-melting point line is arranged in the fusion tube and connected between the elastic pieces on the upper and lower ends of mounting bracket, and the low melting-point line is shorter than the fuse, the low-melting point line is in tensioned state when the fuse-type falling safety device is mounted, and no force is applied on the fuse so that the fuse cannot be easily disconnected even problems existing in the mounting process of the falling safety device, when the system is in fault state, the fault current fuses the fuse rapidly to form an electric arc, and an arc extinction tube is heated to fuse the low-melting point line, and the fusion tube falls smoothly to form obvious cut-off position under the assistance of the elastic piece on the lower end of the bracket.
Description
Technical field
The utility model belongs to power supply locking device technical field, particularly a kind of Fuse Type fall insurance.
Background technology
Drop type fusing insurance is an outdoor high-voltage protection electrical equipment, and it is contained in short circuit, overload protection and branch, the load current that distribution transformer insures on high-pressure side or the distribution wire service main road, is used as transformation insurance and circuit.Drop type fusing insurance is made up of insulating support and cartridge fuse two parts, and fixed contact is installed in the insulating support two ends, divides contact to be installed in an end of insulating support.Moving contact is installed in the cartridge fuse two ends, and cartridge fuse is made up of the expulsion tube of internal layer and outer field phenolic aldehyde paper tube or epoxy stringing.The fusing insurance of pulling load drop type strengthen elasticity auxiliary contact and arc-extinguish chamber, with minute, close load current.
Drop type fusing insurance is when operate as normal, and cartridge fuse is in closure state by the fuse tensioning.When system broke down, fault current made the fuse quick-break, formed electric arc, and expulsion tube is subjected to thermic arc scorching hot, decomposes a large amount of gas, made and formed very high pressure in the pipe, and form vertical blowing along pipeline, and electric arc is elongated the back rapidly and extinguishes.Fuse failure rear lower contact lose tension force and under turn over, locking machinery discharges cartridge fuse, cartridge fuse falls, and forms significantly to cut-off the position.
But the problem that exists is, when drop type fusing insurance is installed with the link rod high-altitude, fuse in the cartridge fuse just is in tensioned state, in case appearance is installed inaccurate or drop type fusing is insured from coming off in the air, fuse in the cartridge fuse will break, a fusing insurance sometimes is installed expends several fuses, increased cost widely.
The utility model content
The Fuse Type fall insurance that fuse can not disconnect easily when the utility model provided a kind of the installation.
A kind of Fuse Type fall insurance, comprise insulator, mounting bracket and fusion tube, described fusion tube lower end is connected with the mounting bracket axle, the upper end is connected with the mounting bracket contact, setting operation ring on the described fusion tube, described mounting bracket upper end is connected by the fuse that passes fusion tube with the shell fragment of mounting bracket lower end, between the shell fragment of described fusion tube inherent mounting bracket upper end and mounting bracket lower end an eutectic dotted line is set, and described eutectic dotted line is shorter than fuse.
Described eutectic dotted line is a nylon wire.
Because the utility model is provided with an eutectic dotted line in described fusion tube, be connected between the shell fragment of mounting bracket upper end and mounting bracket lower end, and described eutectic dotted line is shorter than fuse, like this when the Fuse Type fall insurance is installed, the eutectic dotted line is in tight state, and that fuse does not have is stressed, even install in the process of fall insurance, there are some problems, fuse can not disconnect easily yet, and when system broke down, fault current made the fuse quick-break, form electric arc, expulsion tube is subjected to thermic arc scorching hot, and the fusing of eutectic dotted line does not influence under the help of support lower end shell fragment, cartridge fuse falls, and forms significantly to cut-off the position.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of Fuse Type fall insurance, comprise insulator 1, mounting bracket 2 and fusion tube 3, described fusion tube 3 lower ends are connected with 2 of mounting brackets, the upper end is connected with mounting bracket 2 contacts, setting operation ring 4 on the described fusion tube 3, and described mounting bracket 2 upper ends are connected by the fuse 5 that passes fusion tube 3 with the shell fragment 7 of mounting bracket 2 lower ends, between the shell fragment 7 of described fusion tube 3 inherent mounting bracket 2 upper ends and mounting bracket 2 lower ends an eutectic dotted line 6 is set, described eutectic dotted line 6 is shorter than fuse 5.
Described eutectic dotted line 6 is a nylon wire.
Because the utility model is provided with an eutectic dotted line in described fusion tube, be connected between the shell fragment of mounting bracket upper end and mounting bracket lower end, and described eutectic dotted line is shorter than fuse, like this when the Fuse Type fall insurance is installed, the eutectic dotted line is in tight state, and that fuse does not have is stressed, even install in the process of fall insurance, there are some problems, fuse can not disconnect easily yet, and when system broke down, fault current made the fuse quick-break, form electric arc, expulsion tube is subjected to thermic arc scorching hot, and the fusing of eutectic dotted line does not influence under the help of support lower end shell fragment, cartridge fuse falls, and forms significantly to cut-off the position.
Claims (2)
1. Fuse Type fall insurance, comprise insulator, mounting bracket and fusion tube, described fusion tube lower end is connected with the mounting bracket axle, the upper end is connected with the mounting bracket contact, setting operation ring on the described fusion tube, described mounting bracket upper end is connected by the fuse that passes fusion tube with the shell fragment of mounting bracket lower end, it is characterized in that: between the shell fragment of described fusion tube inherent mounting bracket upper end and mounting bracket lower end an eutectic dotted line is set, described eutectic dotted line is shorter than fuse.
2. Fuse Type fall insurance as claimed in claim 1 is characterized in that: described eutectic dotted line is a nylon wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202243233U CN201549457U (en) | 2009-10-22 | 2009-10-22 | Fuse-type falling safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202243233U CN201549457U (en) | 2009-10-22 | 2009-10-22 | Fuse-type falling safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201549457U true CN201549457U (en) | 2010-08-11 |
Family
ID=42604636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202243233U Expired - Fee Related CN201549457U (en) | 2009-10-22 | 2009-10-22 | Fuse-type falling safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201549457U (en) |
-
2009
- 2009-10-22 CN CN2009202243233U patent/CN201549457U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20121022 |