CN210403648U - Auxiliary arc extinguishing structure of excitation fuse - Google Patents
Auxiliary arc extinguishing structure of excitation fuse Download PDFInfo
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- CN210403648U CN210403648U CN201921812787.6U CN201921812787U CN210403648U CN 210403648 U CN210403648 U CN 210403648U CN 201921812787 U CN201921812787 U CN 201921812787U CN 210403648 U CN210403648 U CN 210403648U
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- 230000005284 excitation Effects 0.000 title claims abstract description 26
- 238000004880 explosion Methods 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 12
- 239000000084 colloidal system Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 3
- 230000003094 perturbing effect Effects 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 description 16
- 230000008033 biological extinction Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000000670 limiting effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000001960 triggered effect Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
An auxiliary arc extinguishing structure of an excitation fuse comprises an upper shell, a lower shell and a conducting plate arranged between the upper shell and the lower shell; an electronic ignition and explosion device and a piston are arranged in the accommodating cavity of the upper shell from top to bottom; an accommodating cavity for the conductive plate to fall off after being disconnected is formed in the lower shell; the arc extinguishing device is characterized in that an auxiliary arc extinguishing device is arranged on the piston, the conductive plate or the bottom of the containing cavity of the lower shell separately or at least two parts simultaneously. The auxiliary arc extinguishing structure can improve the breaking capacity of the excitation fuse and improve the working reliability.
Description
Technical Field
The invention relates to the field of power control and electric automobiles, in particular to an auxiliary arc extinguishing structure for an excitation fuse for cutting off a current transmission circuit through external signal control.
Background
The product of circuit overcurrent protection is a fuse which is fused based on heat generated by current flowing through the fuse, and the main problem is the matching relationship between the thermal fuse and a load. For example, in the case of main loop protection of a new energy vehicle, if the load is overloaded by a low multiple or short-circuited, the fuse with the low current specification cannot meet the condition of short-time overshoot of current, and if the fuse with the high current specification is selected, the requirement of rapid protection cannot be met. In the lithium battery pack which provides energy for the current new energy vehicles, the output current is about several times of the rated current under the condition of short circuit, and the protection time of the fuse can not meet the requirement, so that the battery pack generates heat and burns. Because the resistance current heating and the breaking current heating melting are both from the current flowing through the fuse, the protection device adopting the heating melting of the current cannot achieve the breaking speed of the fault current with a certain amplitude value which is fast enough under the condition of having a larger rated current or resisting stronger short-time overload/impact current (such as short-time heavy current when an electric automobile is started or climbs a slope), or achieve a higher rated current under the condition of the protection speed of the fault current with a certain amplitude value which is fast enough, or can resist the larger overload/impact current without damage.
Another fuse has a problem in that it cannot communicate with external devices and cannot be triggered by signals other than current, such as a vehicle ECU, BMS, or other sensors. If the circuit cannot be cut off in time under the conditions of serious collision, water soaking, overhigh temperature of the battery after insolation and the like of the vehicle, the serious event that the vehicle is finally damaged due to the combustion of the battery pack can be caused.
At present, a quick-breaking cut-off opening structure exists in the market, and mainly comprises a gas generating device, a current-conducting plate and a containing cavity after the current-conducting plate falls off, wherein the gas generating device generates high-pressure gas to drive a piston to break the current-conducting plate, and the broken current-conducting plate falls downwards into the containing cavity, so that the purpose of quick disconnection of a circuit is realized. However, it also has some drawbacks and drawbacks, resulting in a limited arc extinguishing capacity: limited by air, large fault currents are difficult to break; the electric arc is directly cooled by air, and the breaking capacity is greatly influenced by air pressure and temperature and humidity; in the breaking process, the electric arc directly burns the piston knife, and the combustion of the piston knife can influence smooth arc extinction; in the breaking process, except for limited disturbance of the piston knife to the electric arc, no other structure or mechanism assists arc extinction.
Disclosure of Invention
The invention aims to provide an auxiliary arc extinguishing device for exciting a fuse, which can more effectively extinguish a large amount of arcs generated when the fuse is disconnected, improve the breaking capacity and improve the electrical performance of the fuse.
In order to solve the technical problem, the technical scheme provided by the invention is an auxiliary arc extinguishing structure of an excitation fuse, which comprises an upper shell, a lower shell and a conductive plate arranged between the upper shell and the lower shell; an electronic ignition and explosion device and a piston are arranged in the accommodating cavity of the upper shell from top to bottom; an accommodating cavity for the conductive plate to fall off after being disconnected is formed in the lower shell; the arc extinguishing device is characterized in that auxiliary arc extinguishing devices are arranged on the piston, the conducting plate or the bottom of the containing cavity of the lower shell independently or at least in a pairwise combination mode.
The piston comprises a piston body and a knife-shaped structure positioned below the piston body; and the auxiliary arc extinguishing devices are respectively arranged on the upper surface of the piston body or two side surfaces of the knife-shaped structure, which are in contact with the conductive plate.
The auxiliary arc extinguishing device arranged on the piston body is a magnetic north pole and a magnetic south pole which are arranged on the piston body from top to bottom; the magnetic north and south poles may form a perturbing arc, which moves the arc away from, elongates, and cools the magnetic field.
The auxiliary arc extinguishing device on the knife-shaped structure is arc isolating sheets arranged on two side faces of the knife-shaped structure.
The conductive plate is provided with a fracture notch, and the auxiliary arc extinguishing device is arc extinguishing coating or colloid coated at the fracture notch.
An auxiliary arc extinguishing device is arranged on the conducting plate positioned at the containing cavities of the upper shell and the lower shell, and the auxiliary arc extinguishing device is an arc disturbing sheet.
At least one layer of arc-disturbing sheet is respectively arranged on the upper surface and the lower surface of the conductive plate positioned in the accommodating cavities of the upper shell and the lower shell; one end of the arc disturbing sheet is firmly fixed on the current conducting plate, and the other end of the arc disturbing sheet is fixed on the current conducting plate with smaller binding force.
The auxiliary arc extinguishing device is arranged at the bottom of the accommodating cavity on the lower shell; when the conductive plate is broken, the conductive plate which is rotationally broken along the fixed end can be contacted with the auxiliary arc extinguishing device.
The auxiliary arc extinguishing device comprises an arc extinguishing liquid substance or an arc extinguishing solid substance arranged at the bottom of the accommodating cavity; the arc extinguishing liquid substance or the arc extinguishing solid substance is sealed at the bottom of the accommodating cavity through a sealing film.
The auxiliary arc extinguishing device is arranged on different components singly or together, and the auxiliary arc extinguishing is carried out by various technical means such as magnetic field magnetic arc quenching, arc extinguishing by arc extinguishing substances (arc extinguishing liquid or solid), arc extinguishing by arc isolating plates, arc extinguishing by arc disturbing plates and the like. Each auxiliary arc extinguishing device has the advantages that: the arc extinction of large current can be realized rapidly; arc extinguishing liquid, solid, arc isolating sheets, arc disturbing sheets and the like are insensitive to air pressure and environment temperature and humidity, and arc extinguishing reliability can be improved; the piston knife is protected by the arc isolating sheet, and the electric arc hardly damages the piston knife; the arc extinguishing process is safer. Through setting up supplementary arc control device, can improve excitation fuse breaking capacity, improve operational reliability.
Drawings
FIG. 1 is a schematic cross-sectional view of an excitation fuse provided with arc-isolating plates.
FIG. 2 is a schematic cross-sectional view of an excitation fuse provided with a magnetic field.
Fig. 3 is a schematic structural view of applying an auxiliary arc-extinguishing coating or an arc-extinguishing colloid to the fracture notch of the conductive plate. The figure a is the structural diagram before the conductive plate is disconnected, and the figure b is the structural diagram after the conductive plate is disconnected.
Fig. 4 is a schematic structural view of an auxiliary arc extinguishing device arranged at the bottom of the accommodating cavity of the lower housing. The figure a is the structural diagram before the conductive plate is disconnected, and the figure b is the structural diagram after the conductive plate is disconnected.
Fig. 5 is a schematic cross-sectional view of a structure in which the arc-deflecting piece is provided on the conductive plate.
Fig. 6 is a schematic diagram showing the structural relationship between the arc-disturbing pieces and the conductive plates after the conductive plates are disconnected. Wherein, the diagrams a, b, c, d and e are the structural schematic diagrams of five installation modes of the arc-disturbing sheet after the conductive plate is disconnected.
Fig. 7 is a schematic structural view of an auxiliary arc extinguishing device installed at the upper piston, the conductive plate, the lower housing accommodating cavity and the like of the excitation fuse. The figure a is the structural diagram before the conductive plate is disconnected, and the figure b is the structural diagram after the conductive plate is disconnected.
Detailed Description
The above technical solutions will be specifically described with reference to the drawings by way of examples. The fast current cut-off device of the present invention mainly comprises an upper shell, a conductive plate, a lower shell, a gas generating device, etc., and refer to fig. 1 to 6, wherein.
The housing, in this embodiment, is formed by splicing an upper housing 1 and a lower housing 2. A conducting plate 3 is arranged between the contact surfaces of the upper shell and the lower shell, and the upper shell, the lower shell and the conducting plate are fixed together through screws between the upper shell and the lower shell. The contact parts of the conductive plate and the end surfaces of the upper shell and the lower shell are sealed.
Set up the holding chamber in last casing, in this embodiment, this holding chamber divide into two parts about and link up the setting, and last holding intracavity is fixed and is provided with electronic ignition explosion device 4, and electronic ignition explosion device upper end is fixed a position it through setting up the clamp plate. The piston 5 is arranged in the lower accommodating cavity, the piston and the lower accommodating cavity are in interference fit, and the interference fit degree meets the requirement that the piston can be separated from interference fit constraint and does impact motion downwards when being impacted by high-pressure gas. The electronic ignition explosion device is a gas generating device, and generates high-pressure gas by receiving an external signal to ignite so as to push the piston to displace.
And the piston 5 comprises a piston body with a cylindrical structure, and the piston body is in interference fit with the lower accommodating cavity of the upper shell. A knife-like structure 51 is provided below the piston body. The two side ends of the knife-shaped structure protrude out of the side wall of the piston body, and limiting lugs protruding out of the two side ends are arranged on the front side and the rear side of the lower part of the two side ends of the knife-shaped structure protruding out of the piston body. The width of the knife-shaped structure is larger than that of the conductive plate and is positioned right above the fracture notch of the conductive plate. The lower surface of the knife-shaped structure is provided with an inclined plane, so that the shearing force is conveniently and intensively applied, and the conductive plate is conveniently cut off. Vertical grooves corresponding to two side ends of the knife-shaped structure are formed in the lower accommodating cavity wall, and the vertical grooves extend downwards to the lower end face of the upper shell and are communicated with the accommodating cavity of the lower shell. A notch for accommodating the limit bump is also arranged in the groove. When the piston is arranged in the lower accommodating cavity, the two side ends of the knife-shaped structure are respectively positioned in the vertical grooves corresponding to the knife-shaped structure, and the limiting convex block is positioned in the grooves. So set up, vertical recess can fix a position the piston, prevents its rotation, guarantees that sword column structure can aim at the required position of cutting off of current conducting plate when assaulting. The limiting convex block is positioned in the notch to limit the upper position and the lower position of the piston, so that the piston is prevented from damaging a fracture notch of the current-conducting plate under the vibration condition.
When the knife-like piston structure impacts the conductive plate, referring to fig. 1, arc-isolating pieces 52 for auxiliary arc extinguishing are respectively arranged on two side surfaces contacting the conductive plate. The arc isolating sheet is attached to the side face of the knife-shaped structure. The arc-isolating sheet is made of refractory materials such as ceramic sheets or mica sheets. And arc extinguishing gas generating substances can be added on the side surfaces of the arc isolating pieces in an auxiliary manner according to the requirement. When the excitation fuse is triggered by an external trigger signal, the conductive plate is broken from the pre-fracture, and an electric arc is generated at the fracture. And the arc isolating pieces are attached to the two ends of the piston cutter, the arc isolating pieces enable the arc space to be enlarged and cool for arc extinction, and arc extinction gas can be released by the aid of arc extinction gas generation substances added in an auxiliary mode for arc extinction. The arc isolating sheet arranged on the piston has the advantages that the arc extinguishing of large current is realized rapidly with the help of the arc isolating sheets on the two sides of the piston knife; the arc-isolating sheet is insensitive to air pressure and environmental temperature and humidity, so that the arc-extinguishing reliability is improved; the piston knife is protected by the arc isolating sheet, and the electric arc hardly damages the piston knife; the arc extinguishing process is safer.
On the upper surface of the piston body, referring to fig. 2, two magnetic substances, namely a magnetic north pole 53 and a magnetic south pole 54, are arranged from top to bottom in sequence, so that a strong magnetic field is formed at the piston. When the excitation fuse is triggered by an external trigger signal, the conductive plate is broken from the pre-fracture, and an electric arc is generated at the fracture. The piston knife is provided with a strong magnetic field, the magnetic field acts on the electric arc, and the electric arc is blown open and elongated to be cooled, so that magnetic arc extinction is realized. The magnetic arc quenching has the advantages that under the action of the magnetic field of the piston knife, the arc quenching on large current is realized rapidly; magnetic quenching improves the arc extinguishing reliability; the magnetic field acts on the electric arc to enable the electric arc to be far away, and the piston knife is hardly damaged; the arc extinguishing process is safer.
When the piston is not impacted by external force, the piston can be positioned in the lower accommodating cavity. When the piston is impacted by high-pressure gas, the piston moves downwards, the limiting boss breaks to lose the limiting effect on the piston, and the piston moves downwards under the guidance of the vertical groove to cut off the conductive plate. The knife-shaped structure of the piston is eccentrically arranged relative to the piston body, so that the reverse installation of the piston can be prevented.
The lower shell is provided with an accommodating cavity at a position corresponding to the upper shell, and the upper part of the accommodating cavity is wider than the lower part of the accommodating cavity, so that a limiting step is formed at the lower end of the upper part of the accommodating cavity. The conducting plate 3 is downward recessed towards the containing cavity of the lower shell, and a flat-bottom notch is formed in the containing cavity of the lower shell, so that the whole conducting plate is of an inverted-U-shaped structure. The bottom both ends of the flat bottom notch of the current conducting plate lean against the position limiting step formed by the lower end of the upper part of the accommodating cavity to support the accommodating cavity. The flat bottom part of the notch of the conductive plate at the bottom of the accommodating cavity is provided with a fracture gap 31 and a bending gap 32 at intervals. Each notch penetrates the width of the conductive plate. The shape of each notch can be a V-shaped structure, a U-shaped structure or U, V notch combination. The piston knife-shaped structure is positioned above the fracture gap.
At the fracture knife edge, referring to fig. 3, arc extinguishing paint or colloid 33 for assisting arc extinguishing is coated, and the arc extinguishing paint or colloid is made of silicon rubber or similar substances capable of generating gas at high temperature. When the excitation fuse is triggered by an external trigger signal, the conductive plate is broken from the pre-breaking position, an electric arc is generated at the breaking position, arc extinguishing substances at the breaking position release arc extinguishing gas due to the high temperature of the electric arc, and arc extinguishing is completed by the aid of the arc extinguishing substances and the released arc extinguishing gas 34. The scheme has the advantages that the arc extinction of the large current is rapidly realized under the help of the arc extinction substance at the pre-fracture of the current conducting plate; the arc extinguishing coating and the colloid are insensitive to air pressure and environmental temperature and humidity, and arc extinguishing reliability is improved; the electric arc is quickly extinguished, and the piston knife is hardly influenced; the arc extinguishing coating and the colloid can quickly extinguish the arc, so that the arc extinguishing process is safer.
The lower housing accommodating cavity where the conductive plate is located can be used for the piston to move downwards along the accommodating cavity. The containing cavity below the conductive plate can be used for the knife-shaped structure of the piston to pass through. The conductive plate is a flat plate structure, and in this embodiment, the conductive plate is made of copper, which has a small resistance.
An auxiliary arc extinguishing device is arranged at the bottom of the accommodating cavity below the conductive plate. Referring to fig. 4, the auxiliary arc extinguishing device includes an arc extinguishing medium 61 and a sealing film 62 sealing the arc extinguishing medium. The arc-extinguishing medium may be liquid or solid. The arc extinguishing liquid or the arc extinguishing solid is sealed at the bottom of the accommodating cavity through a sealing film. The arc extinguishing liquid is liquid arc extinguishing substances such as fluorinated liquid and the like, and the arc extinguishing solid is powder or granular arc extinguishing substances such as quartz sand and the like. When the excitation fuse is triggered by an external trigger signal, the conducting plate which is broken from the pre-breaking opening breaks through a sealing film of the arc extinguishing device and enters arc extinguishing liquid or arc extinguishing solid, and arc extinguishing is assisted to finish arc extinguishing through the arc extinguishing liquid or the arc extinguishing solid. The arc extinguishing device has the advantage that the arc extinguishing device can quickly extinguish large current with the help of liquid or solid arc extinguishing substances. The liquid arc extinguishing substance is insensitive to air pressure and environment temperature and humidity, and arc extinguishing reliability is improved; the quartz sand and other powder or granular arc extinguishing substances can extinguish the arc with high reliability; the arc is quickly extinguished, and the piston knife is hardly influenced.
The auxiliary arc extinguishing device can also adopt a flexible structure, wherein an arc disturbing sheet 7 is arranged at the pre-breaking position of the conducting plate and is a plastic film or aramid paper high molecular polymer. Referring to fig. 5, the arc-disturbing pieces may be disposed on the conductive plate, below the conductive plate, or above and below the pre-cut of the conductive plate. One end of the arc disturbing sheet positioned on the current conducting plate is fixed on the current conducting plate, and the other end of the arc disturbing sheet is a free end and is lapped on the current conducting plate. The two ends of the arc disturbing sheet positioned below the current conducting plate are respectively fixed on the current conducting plate. The installation of arc disturbing pieces is flexible, and can be adjusted according to circuit requirements, so that the arc extinguishing capability is enhanced. The following five layout schemes can be used and adjusted more flexibly in practical use so as to achieve the best arc extinguishing effect. Meanwhile, the shape of the arc disturbing sheet can be adjusted according to the requirement, such as the arc disturbing sheet with arc bending and the like. Referring to fig. 6 a and b, the arc-disturbing pieces are installed on the upper and lower surfaces of the current-conducting plate, the same end of the arc-disturbing piece on the upper and lower surfaces of the current-conducting plate is firmly fixed on the current-conducting plate, the other end of the arc-disturbing piece is fixed on the current-conducting plate with a small binding force, when the piston impacts the current-conducting plate, the end with the small binding force of the arc-disturbing piece is separated from the current-conducting plate after the current-conducting plate is disconnected, and arc extinction is assisted along with the downward. In the figure c, two layers of arc-disturbing sheets are respectively arranged on the upper surface and the lower surface of the current-conducting plate, wherein the same end of each arc-disturbing sheet on the upper surface and the lower surface is firmly fixed at one end of the current-conducting plate, and the other end is fixed at the other end of the current-conducting plate by smaller binding force; the other layer is fixed at the opposite ends. When the piston impacts the conducting plate, after the conducting plate is disconnected, under the impact of the piston and the conducting plate, the two layers of arc disturbing pieces move downwards respectively to be in contact with the bottom of the accommodating cavity, and arc extinguishing is assisted through the arc disturbing pieces. In the diagrams d and e, the upper surface and the lower surface of the current-conducting plate are respectively provided with a layer of arc-disturbing sheets, the firm fixed end of the arc-disturbing sheet on the current-conducting plate is arranged opposite to the firm fixed end of the arc-disturbing sheet below the current-conducting plate, and the fixed end with smaller binding force of the arc-disturbing sheet on the current-conducting plate is also arranged opposite to the fixed end with smaller binding force of the arc-disturbing sheet below the current-conducting plate. When the piston impacts the conducting plate to disconnect the conducting plate, the arc disturbing pieces move downwards and are connected together in a lap joint mode under the driving of the piston and the conducting plate to form an approximate U-shaped or V-shaped arc disturbing piece sealing structure, an isolation cavity is formed, and arc extinguishing capacity is further enhanced. The arc-disturbing piece has the advantages that the arc-disturbing piece is used for rapidly extinguishing the large current with the help of the arc-disturbing piece; the arc-disturbing pieces can improve the arc-extinguishing reliability; because the arc-disturbing sheet disturbs and cuts off the electric arc, the electric arc hardly damages the piston cutter; the arc extinguishing process is safer.
On the excitation fuse, the auxiliary arc extinguishing devices are arranged at different positions (a piston, a conductive plate and the like), the auxiliary arc extinguishing devices at different positions can be independently arranged, or can be combined at a plurality of positions, and referring to fig. 7, the auxiliary arc extinguishing during the disconnection of the excitation fuse is realized.
By arranging the auxiliary arc extinguishing device, the arc extinguishing capability can be improved, so that the breaking capability and the working reliability of the excitation fuse are improved.
Claims (9)
1. An auxiliary arc extinguishing structure of an excitation fuse comprises an upper shell, a lower shell and a conducting plate arranged between the upper shell and the lower shell; an electronic ignition and explosion device and a piston are arranged in the accommodating cavity of the upper shell from top to bottom; an accommodating cavity for the conductive plate to fall off after being disconnected is formed in the lower shell; the arc extinguishing device is characterized in that an auxiliary arc extinguishing device is arranged on the piston, the conductive plate or the bottom of the containing cavity of the lower shell separately or at least two parts simultaneously.
2. The excitation fuse auxiliary arc extinguishing structure according to claim 1, wherein the piston includes a piston body and a knife-like structure located below the piston body; and the auxiliary arc extinguishing devices are respectively arranged on the upper surface of the piston body or two side surfaces of the knife-shaped structure, which are in contact with the conductive plate.
3. The excitation fuse auxiliary arc extinguishing structure according to claim 2, wherein the auxiliary arc extinguishing means provided on the piston body is a magnetic north pole and a magnetic south pole provided on the piston body from top to bottom; the magnetic north and south poles may form a perturbing arc, which moves the arc away from, elongates, and cools the magnetic field.
4. The auxiliary arc extinguishing structure of the excitation fuse of claim 2, wherein the auxiliary arc extinguishing device on the knife-like structure is an arc-isolating piece arranged on two sides of the knife-like structure.
5. The excitation fuse auxiliary arc extinguishing structure according to claim 2, wherein a breaking notch is formed on the conductive plate, and the auxiliary arc extinguishing device is arc extinguishing paint or colloid coated at the breaking notch.
6. The excitation fuse auxiliary arc extinguishing structure according to claim 1, wherein an auxiliary arc extinguishing device is provided on the conductive plate at the receiving cavities of the upper and lower cases, the auxiliary arc extinguishing device being an arc-disturbing piece.
7. The excitation fuse auxiliary arc extinguishing structure according to claim 1, wherein at least one layer of arc-disturbing pieces is respectively arranged on the upper and lower surfaces of the conductive plate at the accommodating cavities of the upper and lower shells; one end of the arc disturbing sheet is firmly fixed on the current conducting plate, and the other end of the arc disturbing sheet is fixed on the current conducting plate with smaller binding force.
8. The excitation fuse auxiliary arc extinguishing structure according to claim 1, wherein the auxiliary arc extinguishing device is disposed at the bottom of the accommodating chamber on the lower housing; when the conductive plate is broken, the conductive plate which is rotationally broken along the fixed end can be contacted with the auxiliary arc extinguishing device.
9. The excitation fuse auxiliary arc extinguishing structure according to claim 8, wherein the auxiliary arc extinguishing device comprises an arc extinguishing liquid substance or an arc extinguishing solid substance disposed at the bottom of the accommodating chamber; the arc extinguishing liquid substance or the arc extinguishing solid substance is sealed at the bottom of the accommodating cavity through a sealing film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921812787.6U CN210403648U (en) | 2019-10-27 | 2019-10-27 | Auxiliary arc extinguishing structure of excitation fuse |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921812787.6U CN210403648U (en) | 2019-10-27 | 2019-10-27 | Auxiliary arc extinguishing structure of excitation fuse |
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| CN210403648U true CN210403648U (en) | 2020-04-24 |
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| CN201921812787.6U Active CN210403648U (en) | 2019-10-27 | 2019-10-27 | Auxiliary arc extinguishing structure of excitation fuse |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571113A (en) * | 2019-10-27 | 2019-12-13 | 西安中熔电气股份有限公司 | Auxiliary arc extinguishing structure of excitation fuse |
| JP2021174746A (en) * | 2020-04-30 | 2021-11-01 | 太平洋精工株式会社 | Electric circuit breaker device |
| CN115241023A (en) * | 2022-08-03 | 2022-10-25 | 东莞市艾德乐电器有限公司 | Quick arc extinguishing device |
-
2019
- 2019-10-27 CN CN201921812787.6U patent/CN210403648U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571113A (en) * | 2019-10-27 | 2019-12-13 | 西安中熔电气股份有限公司 | Auxiliary arc extinguishing structure of excitation fuse |
| JP2021174746A (en) * | 2020-04-30 | 2021-11-01 | 太平洋精工株式会社 | Electric circuit breaker device |
| WO2021220588A1 (en) * | 2020-04-30 | 2021-11-04 | 太平洋精工株式会社 | Electric circuit-breaker device |
| CN115241023A (en) * | 2022-08-03 | 2022-10-25 | 东莞市艾德乐电器有限公司 | Quick arc extinguishing device |
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Address after: 710075 Zhongrong Electric Industrial Base, No. 97, Jinye Second Road, High tech Zone, Xi'an, Shaanxi Patentee after: XI'AN ZHONGRONG ELECTRIC Co.,Ltd. Address before: Room 3-10303, East District, modern enterprise center, No.12, zone a, pioneer R & D Park, 69 Jinye Road, high tech Zone, Xi'an City, Shaanxi Province, 710077 Patentee before: XI'AN ZHONGRONG ELECTRIC Co.,Ltd. |