CN104037029A - Over-current protection device - Google Patents
Over-current protection device Download PDFInfo
- Publication number
- CN104037029A CN104037029A CN201410275138.2A CN201410275138A CN104037029A CN 104037029 A CN104037029 A CN 104037029A CN 201410275138 A CN201410275138 A CN 201410275138A CN 104037029 A CN104037029 A CN 104037029A
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- Prior art keywords
- contact chip
- fusing chamber
- wall
- connecting rod
- fusing
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Abstract
The invention discloses an over-current protection device, comprising a fusing chamber side wall, a fusing chamber upper wall and a fusing chamber lower wall, wherein an upper connecting rod and a lower connecting rod are respectively fixed on the fusing chamber upper wall and the fusing chamber lower wall, an upper contact sheet and a lower contact sheet contacted with each other are respectively fixed on the upper and lower connecting rods, the lower contact sheet and/or the upper contact sheet are magnesium sheets, an air bag is arranged on one side of the upper contact sheet and filled with oxygen, the air bag is provided with an opening close to the upper contact sheet, and the opening is sealed by wax. The over-current protection device has the advantages of being simple in structure, rapid and effective in circuit disconnection and free of burden to a circuit when the circuit is disconnected.
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, in the time that overload and short circuit appear in circuit, circuit is very dangerous.Existing short circuit or overcurrent protective device, it generally adopts fuse, and in the time that electric current exceedes setting, the heat producing with self makes melt fusing, open circuit.Existing fuse, such as fuse switch, in the time that overload or short circuit appear in circuit, cartridge fuse falls, and can cause and pull to circuit because cartridge fuse falls, and brings threat to circuit structure.
Summary of the invention
Technical problem to be solved by this invention is to provide the overcurrent protective device that can not bring burden to circuit when a kind of simple in structure, circuit disconnects fast effectively and circuit disconnects.
The present invention addresses the above problem adopted technical scheme:
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 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, in the time 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 invention and lower connecting rod, in the time disconnecting, can not cause and pull to circuit, can not bring burden to circuit.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
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 present invention is done to detailed description further, but embodiments of the present invention are 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 is made up 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, and in the time that circuit is normally worked, this device is normally worked.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 contact, the reliability that intensifier circuit connects.In the time 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 it should not select the material of conduction in the time that fuse chamber upper wall 2 and/or fusing chamber lower wall 5 are selected conductive material, while expansion at phase two ends with guarantee 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 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 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, in the time that 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 made its structure more stable.In the time fusing chamber upper wall 2 and fusing chamber lower wall 5 or only have 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 the chamber lower wall 5 that easily makes to fuse is out of shape, 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 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 than 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 chamber lower wall 5, ensure effective disconnection of circuit.
As mentioned above, can realize preferably the present invention.
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 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), in described air bag (8), fill oxygen, on described air bag (8), opening is set, 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 |
|---|---|---|---|
| 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 true CN104037029A (en) | 2014-09-10 |
| CN104037029B CN104037029B (en) | 2015-09-30 |
Family
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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 |
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| Country | Link |
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| CN (1) | CN104037029B (en) |
Citations (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 |
| CN101527235A (en) * | 2008-03-06 | 2009-09-09 | 颜琼章 | Overcurrent protective device and manufacture method thereof |
| CN103403834A (en) * | 2011-03-02 | 2013-11-20 | 西门子公司 | Subsea fuse assembly |
| CN103730301A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Fuse cutout |
| 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 |
-
2014
- 2014-06-19 CN CN201410275138.2A patent/CN104037029B/en active Active
Patent Citations (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 |
| CN101527235A (en) * | 2008-03-06 | 2009-09-09 | 颜琼章 | Overcurrent protective device and manufacture method thereof |
| CN103403834A (en) * | 2011-03-02 | 2013-11-20 | 西门子公司 | Subsea fuse assembly |
| CN103730301A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Fuse cutout |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104037029B (en) | 2015-09-30 |
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