CN203882934U - Overcurrent protective device - Google Patents
Overcurrent protective device Download PDFInfo
- Publication number
- CN203882934U CN203882934U CN201420328524.9U CN201420328524U CN203882934U CN 203882934 U CN203882934 U CN 203882934U CN 201420328524 U CN201420328524 U CN 201420328524U CN 203882934 U CN203882934 U CN 203882934U
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- CN
- China
- Prior art keywords
- contact chip
- fusing chamber
- wall
- fusing
- connecting rod
- 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.)
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Abstract
The utility model discloses an overcurrent protective device comprising a fusing chamber side wall, a fusing chamber top wall, and a fusing chamber bottom wall. A top connection rod is fixed to the fusing chamber top wall and a bottom connection rod is fixed to the fusing chamber bottom wall. A top contact sheet is fixed to one end of the top connection rod. A bottom contact sheet is fixed to one end of the bottom connection rod. The top contact sheet contacts the bottom contact sheet. The top contact sheet and/or the bottom contact sheet are magnesium sheets. An air bag filled with oxygen and equipped with an opening is disposed on a side of the top contact sheet. The opening is close to the top contact sheet and is sealed by wax. The overcurrent protective device is advantageous in simple structure, rapid and effective circuit disconnection, and no circuit burden in disconnection.
Description
Technical field
The utility model relates to power line protection device field, specifically, relates 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, and when electric current surpasses setting, the heat producing with self makes melt fusing, open circuit.Existing fuse, such as fuse switch, when overload or short circuit appear in circuit, cartridge fuse falls, and because cartridge fuse falls, can cause and pull to circuit, to circuit structure, brings threat.
Utility model content
Technical problem to be solved in the utility model is to provide when a kind of simple in structure, circuit disconnects fast effectively and circuit disconnects can not bring the overcurrent protective device of burden to circuit.
The technical scheme in the invention for solving the above technical problem is:
A kind of overcurrent protective device; comprise fusing chamber sidewall, fusing chamber upper wall and fusing chamber lower wall; on described fusing chamber upper wall and fusing chamber lower wall, be fixed with respectively upper connecting rod and lower connecting rod; on described upper connecting rod and one end of lower connecting rod, be fixed with respectively the upper contact chip and the lower contact chip that contact; described lower contact chip and/or upper contact chip are magnesium sheet metal; one side of described upper contact chip is provided with air bag; in described air bag, fill oxygen; on described air bag, opening is set; opening is near upper contact chip, and opening is sealed by wax.
As preferably, described fusing chamber upper wall and/or fusing chamber lower wall are 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 beneficial effects of the utility model are:
1, the utility model 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, and lower contact chip surrounding temperature is raise, wax melts, oxygen in air bag gushes, the burning of aggravation magnesium sheet metal, and the indoor air pressure that fuses sharply rises, the chamber upper wall that makes to fuse expands outwardly with fusing chamber lower wall, and upper connecting rod and lower connecting rod disconnect.
2, upper connecting rod of the present utility model and lower connecting rod, when disconnecting, can not cause and pull to circuit, can not bring burden to circuit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Mark and corresponding parts title in accompanying drawing: 1, fusing chamber sidewall; 2, fusing chamber upper wall; 3, upper contact chip; 4, upper connecting rod; 5, fusing chamber lower wall; 6, lower connecting rod; 7, lower contact chip; 8, air bag.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but execution mode of the present utility model is not limited to this.
Embodiment 1:
A kind of overcurrent protective device as shown in Figure 1, comprise fusing chamber sidewall 1, fusing chamber upper wall 2 and fusing chamber lower wall 5, on described fusing chamber upper wall 2 and fusing chamber lower wall 5, be fixed with respectively upper connecting rod 4 and lower connecting rod 6, on described upper connecting rod 4 and one end of lower connecting rod 6, be fixed with respectively the upper contact chip 3 and the lower contact chip 7 that contact, described lower contact chip 7 and/or upper contact chip 3 are magnesium sheet metal, one side of described upper contact chip 3 is provided with air bag 8, the interior filling oxygen of described air bag 8, on described air bag 8, opening is set, opening is near upper contact chip 3, and opening is sealed by wax.
In the present embodiment, fusing chamber consists of the chamber sidewall 1 that fuses, fusing chamber upper wall 2 and fusing chamber lower wall 5.Upper connecting rod 4 and lower connecting rod 6 are connected in circuit, when circuit is normally worked, and the normal work of this device.In employing, contact chip 3 and lower contact chip 7 carry out the connection of circuit, and its contact-making surface is large, guarantee effectively 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 of fusing, the indoor oxygen content that makes to fuse is limited, can not support the completing combustion of magnesium sheet metal.Because air bag has wax sealing, 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 chamber is confined space, the burning of magnesium sheet metal raises the temperature that fuses indoor, fusing chamber upper wall 2 and fusing chamber lower wall 5 are expanded to two ends respectively, the movement of contact chip 3 and lower contact chip 7 in drive, 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 chamber lower wall 5 should select the material that expansion force is stronger to make, such as aluminium; Fusing chamber sidewall should select the harder material of hardness to make, but when fuse chamber upper wall 2 and/or fusing chamber lower wall 5 are selected conductive material, it should not select the material of conduction, while expanding at phase two ends with assurance fusing chamber upper wall 2 and fusing chamber lower wall 5, fusing chamber 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 been done following optimization on the basis of embodiment 1, and described fusing chamber upper wall 2 and/or fusing chamber lower wall 5 are made of aluminum.
Embodiment 3:
A kind of overcurrent protective device as shown in Figure 1, the present embodiment has been 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 chamber 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, only by upwards expansion of fusing chamber upper wall 2, both reach the object of open circuit, and also made its structure more stable.When fusing chamber upper wall 2 and fusing chamber lower wall 5 or only having fusing chamber lower wall 5 made of aluminum, because upper connecting rod 4 and lower connecting rod 6 are made by metal material, the general low price that adopts, the copper that electric conductivity is good, its quality is large, presses down fusing chamber lower wall 5, and 5 distortion of chamber lower wall easily make to fuse, make upper connecting rod 4 be connected with lower connecting rod 6 unstable, therefore the chamber upper wall 2 that only makes to fuse is made of aluminum.
Embodiment 4:
A kind of overcurrent protective device as shown in Figure 1, the present embodiment has been 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, than lower contact chip 7 or upper contact chip 3, adopt magnesium sheet metal, and the heat that its burning produces is many, guarantee effective expansion of fusing chamber upper wall 2 and/or fusing chamber lower wall 5, guarantee effective disconnection of circuit.
As mentioned above, can realize preferably the utility model.
Claims (4)
1. an overcurrent protective device, it is characterized in that: comprise fusing chamber sidewall (1), fusing chamber upper wall (2) and fusing chamber lower wall (5), on described fusing chamber upper wall (2) and fusing chamber lower wall (5), be fixed with respectively upper connecting rod (4) and lower connecting rod (6), on one end of described upper connecting rod (4) and lower connecting rod (6), be fixed with respectively the upper contact chip (3) and the lower contact chip (7) that contact, described lower contact chip (7) and/or upper contact chip (3) are magnesium sheet metal, one side of described upper contact chip (3) is provided with air bag (8), in described air bag (8), fill oxygen, described air bag arranges opening on (8), opening is near upper contact chip (3), and opening is sealed by wax.
2. a kind of overcurrent protective device according to claim 1, is characterized in that: described fusing chamber upper wall (2) and/or fusing chamber lower wall (5) are made of aluminum.
3. a kind of overcurrent protective device according to claim 2, is characterized in that: described fusing chamber upper wall (2) is made of aluminum.
4. a kind of overcurrent protective device according to claim 1 and 2, 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 |
|---|---|---|---|
| CN201420328524.9U CN203882934U (en) | 2014-06-19 | 2014-06-19 | Overcurrent protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328524.9U CN203882934U (en) | 2014-06-19 | 2014-06-19 | Overcurrent protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203882934U true CN203882934U (en) | 2014-10-15 |
Family
ID=51683408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420328524.9U Active CN203882934U (en) | 2014-06-19 | 2014-06-19 | Overcurrent protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203882934U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037029A (en) * | 2014-06-19 | 2014-09-10 | 国网四川省电力公司成都市新都供电分公司 | Over-current protection device |
| CN107689317A (en) * | 2016-08-06 | 2018-02-13 | 天津中电华利电器科技集团有限公司 | A kind of efficient arc extinguishing fuse |
-
2014
- 2014-06-19 CN CN201420328524.9U patent/CN203882934U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037029A (en) * | 2014-06-19 | 2014-09-10 | 国网四川省电力公司成都市新都供电分公司 | Over-current protection device |
| CN107689317A (en) * | 2016-08-06 | 2018-02-13 | 天津中电华利电器科技集团有限公司 | A kind of efficient arc extinguishing fuse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |