CN104037029B - A kind of overcurrent protective device - Google Patents
A kind of overcurrent protective device Download PDFInfo
- Publication number
- CN104037029B CN104037029B CN201410275138.2A CN201410275138A CN104037029B CN 104037029 B CN104037029 B CN 104037029B CN 201410275138 A CN201410275138 A CN 201410275138A CN 104037029 B CN104037029 B CN 104037029B
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- contact chip
- fusing
- connecting rod
- wall
- air bag
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Abstract
The invention discloses a kind of overcurrent protective device, comprise fusing room sidewall, fusing chamber upper wall and fusing room lower wall, described fusing chamber upper wall and fusing room lower wall are fixed with upper connecting rod and lower connecting rod respectively, described upper connecting rod and one end of lower connecting rod are fixed with the upper contact chip and lower contact chip that contact respectively, described lower contact chip and/or upper contact chip are magnesium sheet metal, the side of described upper contact chip is provided with air bag, oxygen is filled in described air bag, described air bag arranges opening, opening is near upper contact chip, and opening is sealed by wax.Its advantage is: structure is simple, circuit disconnect fast effectively and circuit disconnects time can not bring burden to circuit.
Description
Technical field
The present invention relates to power line protection device field, specifically, relate to a kind of overcurrent protective device.
Background technology
In high and low voltage electric distribution system and control system and power consumption equipment, when overload and short circuit appear in circuit, circuit is very dangerous.Existing short circuit or overcurrent protective device, it generally adopts fuse, when electric current exceedes setting, with the heat that self produces, melt is fused, open circuit.Existing fuse, such as fuse switch, when overload or short circuit appear in circuit, cartridge fuse falls, and pulls, bring threat to circuit structure because cartridge fuse falls to cause to circuit.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of structure is simple, circuit disconnect fast effectively and circuit disconnects time can not bring the overcurrent protective device of burden to circuit.
The present invention's adopted technical scheme that solves the problem is:
A kind of overcurrent protective device; comprise fusing room sidewall, fusing chamber upper wall and fusing room lower wall; described fusing chamber upper wall and fusing room lower wall are fixed with upper connecting rod and lower connecting rod respectively; described upper connecting rod and one end of lower connecting rod are fixed with the upper contact chip and lower contact chip that contact respectively; described lower contact chip and/or upper contact chip are magnesium sheet metal; the side of described upper contact chip is provided with air bag; oxygen is filled in described air bag; described air bag arranges opening; opening is near upper contact chip, and opening is sealed by wax.
As preferably, described fusing chamber upper wall and/or fusing room lower wall made of aluminum.
Further, described fusing chamber upper wall is made of aluminum.
As preferably, described lower contact chip and upper contact chip are magnesium sheet metal.
To sum up, the invention has the beneficial effects as follows:
1, the present invention utilizes the magnesium sheet metal of low ignition point as the contact chip of upper connecting rod and lower connecting rod, when there is overload or short circuit in circuit, heat on magnesium sheet metal sharply increases, and makes lower contact chip and/or the burning of upper contact chip, lower contact chip ambient temperature is raised, wax melts, oxygen in air bag gushes, the burning of aggravation magnesium sheet metal, and the air pressure of fusing indoor sharply rises, fusing chamber upper wall and fusing room lower wall are expanded outwardly, and namely upper connecting rod and lower connecting rod disconnect.
2, upper connecting rod of the present invention and lower connecting rod are when disconnecting, and can not cause and pull, namely can not bring burden to circuit to circuit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Mark and corresponding parts title in accompanying drawing: 1, fuse room sidewall; 2, fuse chamber upper wall; 3, upper contact chip; 4, upper connecting rod; 5, fuse room lower wall; 6, lower connecting rod; 7, lower contact chip; 8, air bag.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
Embodiment 1:
A kind of overcurrent protective device as shown in Figure 1, comprise fusing room sidewall 1, fusing chamber upper wall 2 and fusing room lower wall 5, described fusing chamber upper wall 2 and fusing room lower wall 5 are fixed with upper connecting rod 4 and lower connecting rod 6 respectively, described upper connecting rod 4 and one end of lower connecting rod 6 are fixed with the upper contact chip 3 and lower contact chip 7 that contact respectively, described lower contact chip 7 and/or upper contact chip 3 are magnesium sheet metal, the side of described upper contact chip 3 is provided with air bag 8, oxygen is filled in described air bag 8, described air bag 8 arranges opening, opening is near upper contact chip 3, and opening is sealed by wax.
In the present embodiment, fusing room is made up of the room sidewall 1 that fuses, fusing chamber upper wall 2 and fusing room lower wall 5.Upper connecting rod 4 is connected in circuit with lower connecting rod 6, and when circuit normally works, this device normally works.In employing, contact chip 3 and lower contact chip 7 carry out the connection of circuit, and its contact-making surface is large, ensure effectively to contact, the reliability that intensifier circuit connects.When there is overload or short circuit in circuit, electric current is excessive, heat on contact chip 3 and lower contact chip 7 is sharply increased, because magnesium is low ignition point metal, upper contact chip 3 and lower contact chip 7 take fire, due to the restriction of the indoor oxygen density that fuses, the oxygen content making fusing indoor is limited, namely can not support that magnesium sheet metal burns completely.Because air bag has wax to seal, the fusing point of wax is low, when upper contact chip 3 and lower contact chip 7 take fire, wax is melted, and the oxygen in air bag overflows, and further supports the burning of magnesium sheet metal.Because fusing room is confined space, the burning of magnesium sheet metal makes the temperature rising fusing indoor, fusing chamber upper wall 2 and fusing room lower wall 5 are expanded respectively to two ends, the movement of contact chip 3 and lower contact chip 7 in drive, namely make contact chip 3 and lower contact chip 7 disconnect, reach the object of open circuit.In the present embodiment, fusing chamber upper wall 2 and/or fusing room lower wall 5 should select the stronger material of expansion force to make, such as aluminium; Fusing room sidewall should select the harder material of hardness to make, but it should not select the material of conduction when fusing chamber upper wall 2 and/or fusing room lower wall 5 select conductive material, during to ensure that fusing chamber upper wall 2 and fusing room lower wall 5 are expanded at phase two ends, fusing room sidewall can not be out of shape, the reliability that in raising, contact chip 3 and lower contact chip 7 disconnect.
Embodiment 2:
A kind of overcurrent protective device as shown in Figure 1, the present embodiment has done following optimization on the basis of embodiment 1, namely described fusing chamber upper wall 2 and/or fusing room lower wall 5 made of aluminum.
Embodiment 3:
A kind of overcurrent protective device as shown in Figure 1, the present embodiment has done following optimization on the basis of above-described embodiment, and described fusing chamber upper wall 2 is made of aluminum.Fusing chamber upper wall 2 and fusing room lower wall 5 are fixed upper connecting rod 4 and lower connecting rod 6 respectively, only fusing chamber upper wall 2 is set to aluminum, when short circuit or overload appear in circuit, is only upwards expanded by fusing chamber upper wall 2, both reach the object of open circuit, and also make its structure more stable.When fusing chamber upper wall 2 and fusing room lower wall 5 or only having fusing room lower wall 5 made of aluminum, because upper connecting rod 4 and lower connecting rod 6 are made by metal material, general employing low price, the copper that electric conductivity is good, its quality is large, presses down fusing room lower wall 5, easily makes fusing room lower wall 5 be out of shape, namely make upper connecting rod 4 be connected instability with lower connecting rod 6, therefore only make fusing chamber upper wall 2 made of aluminum.
Embodiment 4:
A kind of overcurrent protective device as shown in Figure 1, the present embodiment has done following optimization on the basis of above-described embodiment, and described lower contact chip 7 and upper contact chip 3 are magnesium sheet metal.Lower contact chip 7 and upper contact chip 3 are magnesium sheet metal, adopt magnesium sheet metal compared to lower contact chip 7 or upper contact chip 3, and the heat that its burning produces is many, ensure effective expansion of fusing chamber upper wall 2 and/or fusing room lower wall 5, namely ensure effective disconnection of circuit.
As mentioned above, the present invention can be realized preferably.
Claims (3)
1. an overcurrent protective device, it is characterized in that: comprise fusing room sidewall (1), fusing chamber upper wall (2) and fusing room lower wall (5), described fusing chamber upper wall (2) and fusing room lower wall (5) are fixed with upper connecting rod (4) and lower connecting rod (6) respectively, described upper connecting rod (4) and one end of lower connecting rod (6) are fixed with the upper contact chip (3) and lower contact chip (7) that contact respectively, described lower contact chip (7) and/or upper contact chip (3) are magnesium sheet metal, the side of described upper contact chip (3) is provided with air bag (8), oxygen is filled in described air bag (8), described air bag (8) arranges opening, opening is near upper contact chip (3), and opening is sealed by wax, described fusing chamber upper wall (2) and/or fusing room lower wall (5) made of aluminum, described upper connecting rod (4) and lower connecting rod (6) are copper.
2. a kind of overcurrent protective device according to claim 1, is characterized in that: described fusing chamber upper wall (2) is made of aluminum.
3. a kind of overcurrent protective device according to claim 1, is characterized in that: described lower contact chip (7) and upper contact chip (3) are magnesium sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410275138.2A CN104037029B (en) | 2014-06-19 | 2014-06-19 | A kind of overcurrent protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410275138.2A CN104037029B (en) | 2014-06-19 | 2014-06-19 | A kind of overcurrent protective device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104037029A CN104037029A (en) | 2014-09-10 |
| CN104037029B true CN104037029B (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410275138.2A Active CN104037029B (en) | 2014-06-19 | 2014-06-19 | A kind of overcurrent protective device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104037029B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB473335A (en) * | 1936-04-07 | 1937-10-07 | Belling & Lee Ltd | Improvements in and relating to fusible electric cutouts |
| US3735315A (en) * | 1971-10-15 | 1973-05-22 | Stanger & Co Ltd | Fuse links for dropout expulsion fuses |
| CN101527235B (en) * | 2008-03-06 | 2011-12-21 | 颜琼章 | Overcurrent protection device and manufacturing method thereof |
| EP2495746A1 (en) * | 2011-03-02 | 2012-09-05 | Siemens Aktiengesellschaft | Subsea fuse assembly |
| CN103730301B (en) * | 2013-12-20 | 2016-02-24 | 苏州宏奇锐自动化有限公司 | Fuse |
| CN203882934U (en) * | 2014-06-19 | 2014-10-15 | 国网四川省电力公司成都市新都供电分公司 | Overcurrent protective device |
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2014
- 2014-06-19 CN CN201410275138.2A patent/CN104037029B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104037029A (en) | 2014-09-10 |
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