CN220106423U - Excitation fuse with striking lug conducting plate - Google Patents
Excitation fuse with striking lug conducting plate Download PDFInfo
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- CN220106423U CN220106423U CN202321110301.0U CN202321110301U CN220106423U CN 220106423 U CN220106423 U CN 220106423U CN 202321110301 U CN202321110301 U CN 202321110301U CN 220106423 U CN220106423 U CN 220106423U
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- arc
- breaking
- arc extinguishing
- cavity
- striking
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- 230000005284 excitation Effects 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 claims abstract description 51
- 230000001960 triggered effect Effects 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims abstract description 3
- 238000010891 electric arc Methods 0.000 claims abstract description 3
- 238000002955 isolation Methods 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides an excitation fuse with striking utmost point ear current-conducting plate, including a plurality of casings, a current-conducting plate is fixed on one of them casing, be equipped with the cavity in the casing of current-conducting plate both sides respectively, be equipped with excitation device in the cavity of one side wherein in proper order, piston device, be equipped with the arc extinguishing device in the cavity of opposite side, the excitation device that is triggered produces driving force in order to promote piston device and breaks the current-conducting plate, the current-conducting plate middle part forms the portion of breaking in advance that can be broken by piston device, the both ends in the length direction of breaking in advance are connected in the current-conducting plate, be equipped with a striking utmost point ear outward in the width direction both ends respectively, the arc extinguishing device includes the arc extinguishing metal group that has the arc extinguishing effect, the portion of breaking in advance who is broken downwards drops from the cavity that the arc extinguishing metal group forms, the striking utmost point ear contacts in the arc extinguishing metal group and forms the connection, the broken electric arc is led to the arc extinguishing device along with the striking utmost point ear. The utility model can lead the disconnected arc to fall into the arc extinguishing device rapidly to effectively extinguish the arc, and ensure the insulation performance of the conducting plate after the disconnection.
Description
Technical Field
The utility model relates to a fuse, in particular to an excitation fuse with an arc striking lug conductive plate.
Background
The conventional electric vehicle battery pack protection device has a structure for rapidly cutting off a conductive part, namely exciting the fuse, and gradually expanding the application range, and mainly aims to overcome the defects of large heating value, high power consumption, large volume weight, limited current impact resistance, long breaking time and uncontrolled breaking process of the conventional fuse. Common structures for energizing fuses include: the device comprises a shell, an excitation device, a piston device and a conductive plate with a pre-fracture, wherein the excitation device (such as a gas generating device) generates high-pressure gas to drive the piston device to break the conductive plate, and the conductive plate falls down into a containing cavity in the shell after breaking, so that the purpose of quick circuit breaking is realized.
However, in the existing excitation fuse, after the middle part of the conductive plate is broken by the piston, the conductive plate falls down to the accommodating cavity below after breaking, an arc is generated at the fracture of the conductive plate, and then an arc extinguishing medium needs to be filled. In addition, the middle part of the conductive plate is broken and then falls into the cavity, so as to enhance the insulation after breaking, for example, a multi-fracture excitation fuse broken in groups is disclosed in Chinese patent application No. 202011461044.6, which is provided with a melt at the cutting structure, and when the broken conductive plate part is displaced to be close to the cutting structure and is not broken, two ends of the broken weak part of the broken conductive plate part can be connected with two ends of the melt; the breaking capacity and the arc extinguishing capacity of the fuse are improved by adding the parallel arc extinguishing melt. For the mode of adding parallel melt, the structure of the fuse is complicated, the size of the fuse is increased, and the cost of the fuse is further increased. The present case results therefrom.
Disclosure of Invention
The utility model aims to provide an excitation fuse with an arc striking lug conductive plate, which can enable a disconnected arc to quickly fall into an arc extinguishing device to effectively extinguish the arc and ensure the insulation performance of the conductive plate after the conductive plate is disconnected.
In order to achieve the above object, the solution of the present utility model is:
the utility model provides an excitation fuse with striking utmost point ear current-conducting plate, including a plurality of casings, a current-conducting plate is fixed on one of them casing, be equipped with the cavity in the casing of current-conducting plate both sides respectively, be equipped with excitation device in proper order in the cavity of one side wherein, piston device, be equipped with the arc extinguishing device in the cavity of the opposite side, the excitation device that is triggered produces drive force in order to promote piston device and breaks the current-conducting plate, the current-conducting plate middle part forms the portion of breaking in advance that can be broken by piston device, the both ends in the length direction are connected in the current-conducting plate in advance of breaking part, be equipped with a striking utmost point ear outward in width direction both ends respectively, the arc extinguishing device includes the arc extinguishing metal group that has the quenching effect, the portion of breaking in advance who breaks down drops from the cavity that the arc extinguishing metal group forms, the striking utmost point ear contacts in the arc extinguishing metal group and forms the connection, the breaking off arc is led to the arc extinguishing device along with the utmost point ear, the portion of breaking in advance after breaking down falls into the bottom isolation chamber that separates with the arc extinguishing device after the arc extinguishing device
Further, the conductive plate is a conductive copper bar, the two arc striking lugs protrude out in the width direction of the conductive copper bar and are symmetrically distributed, and connecting grooves for the arc striking lugs to be inserted into and in contact connection with are correspondingly concavely arranged in the arc extinguishing metal groups.
Further, the arc striking tab forms an oval tab, and the length of the oval tab is greater than the width of the pre-break portion.
Further, two parallel pre-breaking lines are arranged in the middle of the conductive plate, a pre-breaking part is formed between the two pre-breaking lines, the pre-breaking lines are formed by forming U-shaped grooves or V-shaped grooves on one surface or two surfaces of the conductive copper bars, and the pre-breaking lines are broken by a pushed piston device.
Further, the material of the arc extinguishing metal group is stainless steel.
Further, arc extinguishing metal clusters are respectively arranged on two sides of the lower portion of the pre-breaking part, an arc extinguishing cavity for the pre-breaking part to fall off is formed between the two arc extinguishing metal clusters, a notch for the arc striking lug to be inserted into and connected with is concavely formed in the inner side of the arc extinguishing cavity, and a bottom isolation cavity for the pre-breaking part to fall into and not contact with the arc extinguishing metal clusters is formed in the lower portion of the arc extinguishing cavity.
Further, the plurality of shells are respectively a first shell, a second shell and a third shell, the conducting plate is erected on the second shell and is positioned between the first shell and the second shell, an excitation device and a piston device are arranged in a cavity formed by the first shell, and an arc extinguishing device is arranged in a cavity formed by combining the second shell and the third shell.
Further, the middle part of the third shell is enclosed by the baffle plate to form an accommodating cavity with an upper opening, an isolating groove for the pre-breaking part to fall into the bottom is formed in the middle part of the accommodating cavity to form a bottom isolating cavity, and slots for positioning and placing arc extinguishing metal groups are formed on two sides of the isolating groove.
Further, an arc extinguishing cavity is formed between the inner side surfaces of the two arc extinguishing metal groups, the inner side surfaces of the arc extinguishing metal groups comprise an upper section and a lower section, the upper section forms a contact surface contacted with the pre-breaking part, the upper section is arranged above the isolation groove, and a yielding groove positioned outside the isolation groove is formed in the lower section.
Further, a positioning groove for limiting the arrangement of the conductive plate is formed in the second shell, and an opening for the pre-breaking part to fall off and move towards the third shell is formed in the middle of the positioning groove.
After the structure is adopted, when fault current occurs, the triggered excitation device can generate driving force to push the piston device to move downwards and break the conductive plate, the pre-breaking part in the conductive plate breaks, and as the pre-breaking part after breaking is provided with the arc striking lug, the arc striking lug can be quickly contacted and connected with the arc extinguishing metal group when the pre-breaking part is broken and falls down, so that an arc is easier to fall into the arc extinguishing device for arc extinction, the structure is simpler, the efficiency and the effectiveness of arc extinction are greatly improved, meanwhile, the arc striking lug and the pre-breaking part are broken at the bottom at last and are disconnected with the arc extinguishing device, the insulation performance after breaking is ensured, and the current breaking capacity can be improved.
Drawings
Fig. 1 and 2 are schematic perspective views of the present utility model;
FIG. 3 is an exploded view of the structure of the present utility model;
FIG. 4 is a longitudinal cross-sectional view of the present utility model;
FIG. 5 is a schematic view of the structure of the conductive plate above the second housing according to the present utility model;
fig. 6 is an exploded view of the structure between the conductive plate and the second, third and arc extinguishing metal clusters in the present utility model;
fig. 7 is a schematic view showing a structure of an arc extinguishing device in a third case according to the present utility model;
fig. 8 and 9 are schematic structural views of the conductive plate according to the present utility model.
Detailed Description
In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.
Referring to fig. 1 to 4, the utility model discloses an excitation fuse with an arc striking lug conductive plate, which comprises a plurality of shells, wherein a conductive plate is fixed on one of the shells, cavities are respectively arranged in the shells on two sides of the conductive plate, an excitation device and a piston device are sequentially arranged in the cavity on one side, and an arc extinguishing device is arranged in the cavity on the other side. The plurality of shells are respectively a first shell 1, a second shell 2 and a third shell 3, and the three shells can be assembled through nuts corresponding to the plurality of bolts 9, in this embodiment, four bolts 9. Each housing may be made of an insulating material, and the first housing 1 may be provided with a cover 11. The conducting plate 4 is arranged on the second shell 2 and is positioned between the first shell 1 and the second shell 2, an excitation device 5 and a piston device 6 are arranged in a cavity formed by the first shell 1, and an arc extinguishing device 7 is arranged in a cavity formed by combining the second shell 2 and the third shell 3. The exciting means 5 can penetrate from the upper end of the first housing 1, and the piston means 6 is located below the exciting means 5 and is slidably located in the first housing 1. When fault current occurs, the triggered excitation device 5 can generate driving force to push the piston device 6 to move downwards so as to break the conductive plate 4, and the purpose of quick circuit breaking is achieved.
Referring to fig. 3, 8 and 9, in the present utility model, a pre-breaking portion 41 that can be broken by the piston device 3 is formed in the middle of the conductive plate 4, two ends of the pre-breaking portion 41 in the length direction are connected to the conductive plate 4, and an arc striking tab 411 is respectively protruding outwards in two ends in the width direction. In this embodiment, the conductive plate 4 is a conductive copper bar, and the two arc striking lugs 411 protrude in the width direction of the conductive copper bar 4 to form symmetrical distribution. In this embodiment, the arc striking tab 411 may extend outward at two ends of the pre-breaking portion to form an oval tab, and the length of the oval tab may be greater than the width of the pre-breaking portion 41. For the conductive plate 4, in order to enable the conductive plate 4 to be broken rapidly, a breaking weak point is arranged in the conductive plate 4 corresponding to the piston device 6, in this embodiment, two parallel pre-breaking lines 42 are arranged in the middle of the conductive plate 4, and a pre-breaking portion 41 is formed between the two pre-breaking lines 42. The pre-break line 42 may be a U-shaped groove or V-shaped groove formed on one or both sides of the conductive copper bar, and the pre-break line 42 may be broken by a pushed piston device.
Referring to fig. 3 to 7, in the present utility model, the arc extinguishing device 7 includes an arc extinguishing metal block 71 (illustrated by a block structure in the figure) having an arc extinguishing function, and the interrupted pre-interruption portion 41 drops down from a cavity formed by the arc extinguishing metal block 71, and meanwhile, a connecting slot for inserting and contacting the arc striking tab 411 is correspondingly concavely formed in the arc extinguishing metal block 71, the connecting slot corresponds to the shape of the arc striking tab 411, and two ends of the arc striking tab 411 contact with the side wall surface of the connecting slot. In the breaking process, the arc striking tab 411 can be directly and quickly contacted with the arc extinguishing metal group 71 to form connection, so that the broken arc is guided to an arc extinguishing device along with the arc striking tab 411 to extinguish the arc. As shown in fig. 5 and 6, a positioning groove 21 for limiting the supporting position of the conductive plate 4 is formed on the second housing 2, and an opening 22 for the pre-breaking portion 41 to fall off in the direction of the third housing 3 is formed in the middle of the positioning groove 21. The arc extinguishing device can be made of existing electric and heat conducting metal, and the arc extinguishing metal block 71 can be made of stainless steel. In this embodiment, the arc extinguishing metal groups may be formed into a group-like structure by concentrated lamination of metal mesh of arc extinguishing metal, and the arc may be extinguished by heat dissipation of the arc extinguishing metal groups. Meanwhile, the broken pre-breaking part 41 can finally fall into a bottom isolation cavity isolated from the arc extinguishing device after passing through the arc extinguishing device 7, and is disconnected with the arc extinguishing device, so that the insulation performance after disconnection is ensured. In this embodiment, the two sides below the pre-breaking portion 41 are respectively provided with an arc-extinguishing metal group 71, an arc-extinguishing cavity 8 for the pre-breaking portion 41 to drop off is formed between the two arc-extinguishing metal groups 71 at intervals, a notch 81 for the arc-striking tab 411 to fall into is further provided in the inner side of the arc-extinguishing cavity 8 corresponding to the protruding portion of the arc-striking tab 411, the notch 81 may be formed by concave-concave shape of the inner side surface of the arc-extinguishing metal group 71 corresponding to the shape of the arc-striking tab 411 and the drop-off position, and two opposite notches 81 form a connecting slot for the arc-striking tab to insert. Meanwhile, a bottom isolation chamber 82, in which the pre-breaking portion 41 is not in contact with the arc extinguishing metal mass 71 after falling, may be formed at the lower portion of the arc extinguishing chamber 8. Insulating gel or liquid arc extinguishing medium can also be added to the isolation chamber 82. Specifically, the middle part of the third casing 3 is enclosed by the baffle 31 to form a containing cavity with an opening at the upper part, the middle part of the containing cavity forms an isolation groove 32 for the pre-breaking part 41 to fall into the bottom to form a bottom isolation cavity, and two sides of the isolation groove 32 form slots 33 for positioning and placing the arc extinguishing metal clusters 71. Outer convex groove bodies 321 for inserting the arc striking lugs are formed on two sides of the isolation groove 32, and the outer convex groove bodies 321 are correspondingly arranged below the notch grooves 81. An arc extinguishing chamber 8 is formed between the inner side surfaces of the two arc extinguishing metal groups 71, a step can be formed in the inner side surface of the arc extinguishing metal group 71, the inner side surface of the arc extinguishing metal group 71 comprises an upper section 711 and a lower section 712, the upper section 711 forms a contact surface with the pre-breaking part 41, the upper section 711 is arranged above the isolation groove 32, and a relief groove positioned outside the isolation groove 32 is formed in the lower section 712, so that the lower part of the arc extinguishing metal is isolated outside the isolation groove 32.
When the electric arc quenching device is used, when fault current occurs, the triggered excitation device 5 can generate driving force to push the piston device 6 to move downwards and then break the conducting plate 4, the pre-breaking part 41 in the conducting plate 4 breaks, the pre-breaking part 41 after breaking is provided with the arc striking lugs 411, when the pre-breaking part 41 is broken and falls off downwards, the protruding arc striking lugs 411 can provide guiding effect for the pre-breaking part 41 when falling down, the arc striking lugs 411 can quickly form contact connection with the arc extinguishing metal clusters 71 (forming the defect grooves 82), and in the movement process, the arc can be contacted with the arc extinguishing metal clusters along with the arc striking lugs 411, the arc extinguishing metal of the left chamber and the right chamber can be connected to form equal potential, and the voltage price of the arc can fall into the arc extinguishing metal chambers at two sides to be kept horizontal, so that the arc can fall into the arc quenching device more easily, the heat dissipation of the metal at two sides is facilitated to be extinguished, the arc extinguishing structure is simpler, and the arc extinguishing efficiency and the effectiveness are greatly improved. Meanwhile, the arc striking tab 411 and the pre-breaking part 41 can be disconnected in the isolation chamber at the bottom after being finally disconnected and disconnected with the arc extinguishing device, so that the insulation performance after disconnection is ensured, and the breaking current capacity can be improved.
The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.
Claims (10)
1. The utility model provides an excitation fuse with striking utmost point ear current conducting plate, includes a plurality of casings, and a current conducting plate is fixed on one of them casing, is equipped with the cavity respectively in the casing of current conducting plate both sides, is equipped with excitation device, piston device in proper order in the cavity of one side wherein, is equipped with the arc extinguishing device in the cavity of opposite side, and the excitation device that is triggered produces driving force in order to promote piston device to break the current conducting plate, its characterized in that: the electric conduction plate middle part forms the portion of breaking in advance that can be broken by piston device, the portion of breaking in advance is connected in the electric conduction plate at the both ends of length direction, be equipped with an arc striking utmost point ear to the evagination respectively in width direction both ends, arc extinguishing device is including the arc extinguishing metal group that has the arc extinguishing effect, the portion of breaking in advance that is broken down drops from the cavity that the arc extinguishing metal group formed, the arc striking utmost point ear contacts in the arc extinguishing metal group and forms the connection, the disconnection electric arc is led to arc extinguishing device along with the arc striking utmost point ear, the portion of breaking in advance after being broken falls into the bottom isolation chamber that separates with arc extinguishing device after the arc extinguishing device.
2. An energized fuse having an arc striking tab conductive plate as defined in claim 1 wherein: the conducting plate is a conducting copper bar, the two arc striking lugs protrude out in the width direction of the conducting copper bar and are symmetrically distributed, and connecting grooves for the arc striking lugs to be inserted into and in contact connection with are correspondingly concavely arranged in the arc extinguishing metal groups.
3. An energized fuse having an arc striking tab conductive plate as defined in claim 2 wherein: the arc striking tab forms an oval tab, and the length of the oval tab is greater than the width of the pre-breaking portion.
4. An energized fuse having an arc striking tab conductive plate as defined in claim 2 wherein: the middle part of the conductive plate is provided with two parallel pre-breaking lines, a pre-breaking part is formed between the two pre-breaking lines, the pre-breaking lines are formed by forming U-shaped grooves or V-shaped grooves on one surface or two surfaces of the conductive copper bar, and the pre-breaking lines are broken by a pushed piston device.
5. An energized fuse having an arc striking tab conductive plate as defined in claim 1 wherein: the arc extinguishing metal block is made of stainless steel.
6. An energized fuse having an arc striking tab conductive plate as defined in any one of claims 1 to 5 wherein: the two sides below the pre-breaking part are respectively provided with an arc-extinguishing metal group, an arc-extinguishing cavity for the pre-breaking part to fall off is formed between the two arc-extinguishing metal groups at intervals, a notch for the arc-striking lug to be inserted and connected is concavely formed in the inner side of the arc-extinguishing cavity, and a bottom isolation cavity for the pre-breaking part to fall into and not contact with the arc-extinguishing metal groups is formed in the lower part of the arc-extinguishing cavity.
7. An energized fuse having an arc striking tab conductive plate as defined in claim 6 wherein: the multiple shells are respectively a first shell, a second shell and a third shell, the conducting plates are erected on the second shell and are located between the first shell and the second shell, an excitation device and a piston device are arranged in a cavity formed by the first shell, and an arc extinguishing device is arranged in a cavity formed by combining the second shell and the third shell.
8. An energized fuse having an arc striking tab conductive plate as defined in claim 5 wherein: the middle part of the third shell is enclosed by the baffle plate to form an accommodating cavity with an upper opening, the middle part of the accommodating cavity forms an isolating groove for the pre-breaking part to fall into the bottom to form a bottom isolating cavity, and two sides of the isolating groove form slots for positioning and placing arc extinguishing metal groups.
9. An energized fuse having an arc striking tab conductive plate as defined in claim 8 wherein: an arc extinguishing cavity is formed between the inner side surfaces of the two arc extinguishing metal groups, the inner side surfaces of the arc extinguishing metal groups comprise an upper section and a lower section, the upper section forms a contact surface contacted with the pre-breaking part, the upper section is arranged above the isolation groove, and a yielding groove positioned outside the isolation groove is formed in the lower section.
10. An energized fuse having an arc striking tab conductive plate as defined in claim 7 wherein: the second shell is provided with a positioning groove for limiting the arrangement of the conductive plate, and an opening for the pre-breaking part to fall off and move towards the third shell is formed in the middle of the positioning groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321110301.0U CN220106423U (en) | 2023-05-10 | 2023-05-10 | Excitation fuse with striking lug conducting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321110301.0U CN220106423U (en) | 2023-05-10 | 2023-05-10 | Excitation fuse with striking lug conducting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220106423U true CN220106423U (en) | 2023-11-28 |
Family
ID=88843218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321110301.0U Active CN220106423U (en) | 2023-05-10 | 2023-05-10 | Excitation fuse with striking lug conducting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220106423U (en) |
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2023
- 2023-05-10 CN CN202321110301.0U patent/CN220106423U/en active Active
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