CN218039077U - Passive protection type quick breaker - Google Patents
Passive protection type quick breaker Download PDFInfo
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- CN218039077U CN218039077U CN202221858661.4U CN202221858661U CN218039077U CN 218039077 U CN218039077 U CN 218039077U CN 202221858661 U CN202221858661 U CN 202221858661U CN 218039077 U CN218039077 U CN 218039077U
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Abstract
The utility model provides a quick breaker of passive protection formula, include: the device comprises a gas generating device, a breaking grid sheet, an insulating shell, a breaking copper bar, an electric arc channel and an arc extinguish chamber; the gas generating device is used for receiving an external trigger signal, generating energy after being triggered and pushing the breaking grid plate to move towards the arc channel; the blade of the grid breaking piece cuts off the cutting piece from the center line of the cutting piece, and two sides of the cutting piece are connected with the first copper bar and the second copper bar; cutting off the blade of the grid sheet and entering an electric arc channel; the arc generated by cutting off the cut-off copper bar by the cut-off grid sheet is extruded to enter the arc extinguish chamber through the arc channel; a first spiral tooth-shaped structure is circumferentially arranged on the outer surface of the body, in which a steel wire mesh for arc extinction is arranged in the arc extinguishing chamber, and the breaking grid sheet is arranged; and a second spiral tooth-shaped structure matched with the first spiral tooth-shaped structure is arranged on the inner wall of the insulating shell. The utility model provides the security of high use.
Description
Technical Field
The utility model belongs to the technical field of circuit protection, concretely relates to quick ware that opens of passive protection formula.
Background
The fuse is an electric appliance which uses a metal conductor as a melt to be connected in series in a circuit, and when overload or short-circuit current passes through the melt, the fuse is fused due to self heating, so that the circuit is cut off. Fuse simple structure, convenient to use is an electrical apparatus that plays safety protection effect in distribution system, and the fuse wide application is in electric wire netting protection and consumer protection, when electric wire netting or consumer take place short-circuit fault or overload, but automatic cutout circuit avoids electrical equipment to damage, prevents that the accident from stretching.
Various novel fuses begin to appear at present, and the most widely applied fuse is an initiating explosive device breaker.
The function of the initiating explosive device breaker is mainly to protect the protection blind area of the traditional fuse wire, the initiating explosive device breaker and the traditional fuse wire are connected in series in a loop when in use, and when the traditional fuse wire cannot act during short circuit, an automobile BMS (battery management system) can send a signal to the initiating explosive device breaker to break the initiating explosive device breaker, so that the protection is completed.
When the fuse wire is normally used for passing through, current can flow through the through copper bar, and the endurance capacity of the fuse wire is greatly improved compared with that of a traditional fuse wire.
When short circuit occurs, the initiating explosive device receives an ignition signal and is ignited, the high temperature and high pressure generated when the initiating explosive device is ignited push the insulating grid plate to move, and break the through-flow copper bar, so that the through-flow copper bar is divided into two parts and insulated and isolated. In the breaking process, the generated electric arc can enter the arc extinguish chamber containing the energy absorption substance, so as to absorb energy and cool, and finally break.
At present, most initiating explosive device breakers are connected in series with a traditional fuse wire to be protected together when in use. Because adopt the initiating explosive device as gas generator, the instantaneous energy of its production is huge, leads to easily opening the bars piece and assaults and kick-backs the copper bar that opens and shuts, influences the stability of product.
In the prior art, two stress grooves are respectively cut on the front side and the back side in the middle of a copper bar through a laser cutting technology, when the grid piece is cut off, the copper bar can be disconnected from the stress grooves, but the fracture of the copper bar is easily irregular due to the mode, and the descending of the grid piece is influenced. Simultaneously, because the energy that the initiating explosive device produced in the twinkling of an eye is very big, lead to breaking the high-speed operation of bars piece, directly caused very big impact to the body of breaking copper bar and breaker shell, be unfavorable for the stability of product, have the safety risk.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art, providing a passive protection type quick breaker, and improving the safety of the using process.
The utility model adopts the technical proposal that: a passive protective quick disconnect comprising: the device comprises a gas generating device, a breaking grid piece, an insulating shell, a breaking copper bar, an electric arc channel and an arc extinguish chamber; the gas generating device, the breaking grid piece, the breaking copper bar, the arc channel and the arc extinguish chamber are coaxially arranged inside the insulating shell from top to bottom in sequence;
the breaking grid piece comprises a body and a blade; the blade extends from the body of the cut-off grid piece to the cut-off copper bar;
the breaking copper bar comprises a cutting part, a first copper bar and a second copper bar; the cutting part is arranged between the first copper bar and the second copper bar; the cutting-off piece enables the first copper bar to be conducted with the second copper bar;
the gas generating device is used for receiving an external trigger signal, generating energy after being triggered and pushing the breaking grid plate to move towards the arc channel; the blade of the grid breaking sheet cuts off the grid breaking sheet from the center line of the cutting part, and two sides of the cutting part are connected with the first copper bar and the second copper bar; cutting off the blade of the grid sheet and entering an electric arc channel; the electric arc generated by cutting off the cut-off copper bar by the cut-off grid sheet is extruded to enter the arc extinguish chamber through the electric arc channel; a steel wire mesh for arc extinction is arranged in the arc extinction chamber; the electric arc enters the arc extinguish chamber and then contacts with the steel wire mesh;
a first spiral tooth-shaped structure is arranged on the outer surface of the body of the cut-off grid sheet in the circumferential direction; a second spiral tooth-shaped structure matched with the first spiral tooth-shaped structure is arranged on the inner wall of the insulating shell; the second spiral tooth-shaped structure is positioned between the gas generating device and the cut-off copper bar; the first spiral tooth-shaped structure and the second spiral tooth-shaped structure are mutually matched to prevent the breaking grid sheet from moving to the gas generating device.
In the technical scheme, an installation groove is fixedly formed in the arc extinguish chamber; the steel wire mesh is clamped in the mounting groove.
In the technical scheme, the steel wire mesh is arranged opposite to the outlet of the electric arc channel.
In the technical scheme, the steel wire mesh is formed by pressing 304 stainless steel wires into a structure matched with the shape of the mounting groove.
In the technical scheme, the upper part of the arc channel is provided with a step-shaped avoidance groove; the avoidance groove is positioned at two sides below the cut-off part; after the blade of the breaking grid sheet enters the electric arc channel, the broken cutting part is pushed to bend towards two sides and enter the corresponding avoidance grooves.
In the technical scheme, the bottom surfaces of the connection parts of the cut-off parts and the first copper bar and the second copper bar are provided with bending grooves; the bending groove and the avoiding groove are arranged oppositely; the inner wall of one side of the bending groove and the inner wall of the corresponding avoidance groove are on the same plane; the inner wall of the other side of the bending groove and the inner wall of the electric arc channel are in the same plane.
In the technical scheme, the top surface of the cut-off grid sheet is attached to the energy output end of the gas generating device and the inner wall of the insulating shell.
In the technical scheme, the cutting-off part and the blade of the grid-breaking sheet have the same width; the blade end part of the breaking grid sheet is in a sharp knife shape; the blade end of the breaking grid sheet is opposite to the center line of the cutting part.
In the technical scheme, a stress concentration groove with a downward opening is formed in the center line of the bottom surface of the cutting part; the stress concentration groove is a V-shaped groove which is opened towards the arc channel; the top end of the stress concentration groove is opposite to the end part of the blade of the grid-breaking piece.
In the technical scheme, the device also comprises a reinforcing piece; the reinforcing parts are fixedly distributed in the insulating shell outside the gas generating device and the cut-off grid piece.
The beneficial effects of the utility model are that: the breaking capacity is strong, the response speed is high, and the reliability and the safety are improved; the processing difficulty and the assembly difficulty are reduced, and the method also has the advantages of simple process and low cost. The periphery of the upper part of the on-off grid sheet is provided with the spiral tooth-shaped structure and is matched with the spiral tooth-shaped structure on the upper part of the inner side of the insulating shell, so that the on-off grid sheet can run forwards and is clamped when reverse running is required, the reverse running is prevented, and the safety of a product is improved; meanwhile, the speed of the broken grid piece can be reduced in the descending process of the broken grid piece, and the influence on the overall stability of the product due to overlarge impact on the copper bar is avoided. When the gas generating device receives an external trigger signal, the gas generating device pushes the cut-off grid plate to move downwards; the tip of the break grid plate can cut off the break copper bar. The cut-off part divided into two parts is connected with the first copper bar and the second copper bar, and is further pushed into the avoidance groove by the breaking grid piece under the action of the breaking grid piece, so that the influence on the movement of the breaking grid piece is avoided, meanwhile, the unnecessary electric arc generated in the execution process of the protection action is avoided, and the safety of the whole device is enhanced. The blade end of the breaking grid sheet is in a sharp knife shape and is opposite to the stress concentration groove on the bottom surface of the breaking groove, so that the maximum stress concentration effect is generated at the center line of the cutting part, the acting force of the breaking grid sheet is concentrated in the middle of the cutting part when the breaking copper bar is cut off, the cutting part is guaranteed to break from the center line, and the breaking grid sheet completely enters the avoiding groove. The electric arc generated by the break grid blade after the copper bar is cut off can enter the electric arc channel along with the break grid blade to be elongated, and an electric arc voltage higher than a system voltage is formed, so that the current on the break copper bar is reduced.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic view of the breaking grid of the present invention;
FIG. 3 is a partial schematic view of the present invention;
fig. 4 is a schematic diagram of an arc chute of the present invention.
The gas generating device comprises a gas generating device body 1, an insulating shell 2, a first spiral tooth-shaped structure 3, a second spiral tooth-shaped structure 4, a reinforcing piece 5, a first copper bar 6, an arc extinguish chamber 7, a steel wire mesh 8, an electric arc channel 9, a cut-off piece 10, a second copper bar 11, a blade 12, a grid cut-off piece 13, a limiting plate 14, a stress concentration groove 15, a relief groove 16, a bending groove 17 and a mounting groove 18.
Detailed Description
The invention will be further described in detail with reference to the drawings and the following detailed description, which are provided for the purpose of clearly understanding the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model provides a quick breaker of passive protection formula, include: the device comprises a gas generating device 1, a breaking grid sheet 13, an insulating shell 2, a breaking copper bar, an electric arc channel 9 and an arc extinguish chamber 7; the gas generating device 1, the breaking grid sheet 13, the breaking copper bar, the arc channel 9 and the arc extinguish chamber 7 are coaxially arranged in the insulating shell 2 from top to bottom in sequence;
the cut-off copper bar comprises a cut-off part 10, a first copper bar 6 and a second copper bar 11; the cutting piece 10 is arranged between the first copper bar 6 and the second copper bar 11; the cutting-off piece 10 leads the first copper bar 6 to be communicated with the second copper bar 11;
the breaking grid piece 13 comprises a body and a blade 12; the blade 12 extends from the body of the break grid 13 to the break copper bar. The energy source of the gas generating device can be initiating explosive devices. The gas generating device 1 is used for receiving an external trigger signal, generating energy after being triggered, and pushing the breaking grid piece 13 to move towards the arc channel 9; a blade 12 of a breaking grid piece 13 cuts the cutting piece 10 from the center line of the cutting piece, and two sides of the cutting piece 10 are connected with the first copper bar 6 and the second copper bar 11; the blade 12 of the breaking grid piece 13 enters the arc channel 9; the electric arc generated by cutting off the cut-off copper bar by the cut-off grid sheet 13 is extruded to enter the arc extinguish chamber 7 through the electric arc channel 9; a steel wire mesh 8 for arc extinction is arranged in the arc extinction chamber 7; the electric arc enters the arc extinguish chamber 7 and then contacts with the steel wire mesh 8.
The edges of the two sides of the blade 12 are symmetrically extended along the circumferential direction of the body of the grid-breaking piece 13 by taking the edges as the center line to form limit plates 14; the outer surface of the limiting plate 14 and the outer surface of the body are on the same curved surface. The length of the blade 12 is greater than the length of the cutting member 10. The limiting plate 14 is located at the outer side of the corresponding broken copper bar.
As shown in fig. 2, a first spiral-type tooth-shaped structure 3 is circumferentially arranged on the outer surface of the body of the breaking grid piece 13; a second spiral tooth-shaped structure matched with the first spiral tooth-shaped structure 3 is arranged on the inner wall of the insulating shell 2; the second spiral toothed structure 4 is positioned between the gas generating device 1 and the cut-off copper bar; the first helical tooth structure 3 and the second helical tooth structure cooperate with each other to prevent the switching-off grid 13 from moving towards the gas generating device 1. Through the arrangement, the breaking grid piece 13 can operate in the forward direction, and is clamped when reverse operation is desired, so that the reverse operation is prevented.
As shown in fig. 3, a step-shaped avoiding groove 16 is arranged at the upper part of the arc channel 9; the avoidance grooves 16 are positioned at both sides below the cut-off member 10; after the blade 12 of the breaking grid piece 13 enters the arc channel 9, the broken breaking piece 10 is pushed to bend towards two sides and enter the corresponding avoidance groove 16, so that the broken breaking piece 10 completely leaves a descending path of the blade 12, and the blade 12 drives the arc to enter the arc extinguishing chamber 7. The blade 12 of the breaking grid piece 13 generates electric arc on the breaking and cutting part 10, the electric arc enters the electric arc channel 9 to be elongated, and electric arc voltage higher than system voltage is formed, so that current on the breaking copper bar is reduced. The avoiding groove 16 is formed by cutting at the top of the arc channel 9, and the arc channel 9 with the avoiding groove 16 can also be formed by splicing two pieces with different sizes.
Specifically, the bottom surfaces of the joints of the cut-off parts 10 with the first copper bar 6 and the second copper bar 11 are provided with bending grooves 17; the bending groove 17 is opposite to the avoidance groove 16; the inner wall of one side of the bending groove 17 and the inner wall of the avoidance groove 16 opposite to the bending groove are in the same plane; the other side inner wall of the bending groove 17 and the inner wall of the arc channel 9 are in the same plane. When the cut-off part 10 after being broken is bent towards two sides, the bending groove 17 can prevent the bent root part from generating excessive extrusion and resistance, so that the bent root part has a bending space, and the cut-off part 10 after being broken can be bent by 90 degrees to completely enter the avoiding groove 16. The bending of the cutting member 10 when the shutter 13 is moved downward causes resistance to its movement. The thickness of the cutting part 10 determines the force required for bending 90 degrees to a certain extent, so that the moving speed of the grid can be adjusted by adjusting the thickness of the cutting part 10, and when the grid moves too fast, the thickness of the cutting part 10 can be cut off, so that the bending force is larger, the resistance for cutting off the grid 13 is larger, and the speed is slower.
In the above technical solution, the cutting member 10 and the blade 12 of the grid-breaking blade 13 have the same width; the end part of the blade 12 of the breaking grid piece 13 is in a sharp knife shape; the end of the blade 12 of the breaking grid piece 13 is opposite to the center line of the cutting part 10. A stress concentration groove 15 with a downward opening is formed in the center line of the bottom surface of the cutting part 10; the stress concentration groove 15 is a V-shaped groove which is opened towards the arc channel 9; the top end of the stress concentration groove 15 is opposite to the end part of the blade 12 of the grid-opening sheet 13. When the breaking grid piece 13 moves downwards, the stress concentration groove 15 can enable the cutting part 10 to generate the maximum stress concentration effect in the center, and the cutting part 10 is guaranteed to be broken from the center line, so that the broken cutting part 10 can completely enter the avoidance groove 16.
In the above technical solution, the top surface of the open-close grid piece 13 is attached to the energy output end of the gas generating device 1 and the inner wall of the insulating housing 2. A reinforcement 5 is provided inside the insulating housing 2. The reinforcing members 5 are fixedly distributed inside the insulating housing 2 outside the gas generating device 1 and the breaking grid pieces 13. The reinforcing piece 5 is positioned above the break copper bar, so that the overall stability of the product is ensured in the process that the gas generating device 1 acts on the break grid piece 13.
As shown in fig. 4, an installation groove 18 is fixedly arranged in the arc extinguish chamber 7; the steel wire mesh 8 is clamped in the mounting groove 18. The steel wire mesh 8 is arranged opposite to the outlet of the arc channel 9. The steel mesh 8 is formed by pressing 304 stainless steel wires. The steel wire mesh 8 placed in the arc extinguish chamber 7 can be pressed into a special shape by 304 stainless steel wires, so that the steel wire mesh can be matched with the inner cavity structure of the arc extinguish chamber 7 to facilitate clamping and installation, meanwhile, the contact area with electric arcs is larger, and the energy absorption efficiency is higher. The electric arc is cooled through the steel wire mesh 8, and the whole breaking process is completed after energy absorption.
Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A passive protective quick disconnect, comprising: the device comprises a gas generating device, a breaking grid piece, an insulating shell, a breaking copper bar, an electric arc channel and an arc extinguish chamber; the gas generating device, the breaking grid piece, the breaking copper bar, the arc channel and the arc extinguish chamber are coaxially arranged inside the insulating shell from top to bottom in sequence;
the breaking grid piece comprises a body and a blade; the blade extends from the body of the cut-off grid piece to the cut-off copper bar;
the breaking copper bar comprises a cutting part, a first copper bar and a second copper bar; the cutting part is arranged between the first copper bar and the second copper bar; the cutting-off piece enables the first copper bar to be conducted with the second copper bar;
the gas generating device is used for receiving an external trigger signal, generating energy after being triggered and pushing the breaking grid plate to move towards the arc channel; the blade of the grid breaking piece cuts off the cutting piece from the center line of the cutting piece, and two sides of the cutting piece are connected with the first copper bar and the second copper bar; cutting off the blade of the grid sheet and entering an electric arc channel; the arc generated by cutting off the cut-off copper bar by the cut-off grid sheet is extruded to enter the arc extinguish chamber through the arc channel; a steel wire mesh for arc extinction is arranged in the arc extinction chamber; the electric arc enters the arc extinguish chamber and then contacts with the steel wire mesh;
a first spiral tooth-shaped structure is arranged on the outer surface of the body of the breaking grid piece in the circumferential direction; a second spiral tooth-shaped structure matched with the first spiral tooth-shaped structure is arranged on the inner wall of the insulating shell; the second spiral toothed structure is positioned between the gas generating device and the cut-off copper bar; the first spiral tooth-shaped structure and the second spiral tooth-shaped structure are mutually matched to prevent the breaking grid piece from moving towards the gas generating device.
2. A passive protective quick disconnect according to claim 1, wherein: an installation groove is fixedly arranged in the arc extinguishing chamber; the steel wire mesh is clamped in the mounting groove.
3. A passive protective quick disconnect according to claim 1 wherein: the steel wire mesh is arranged opposite to the outlet of the electric arc channel.
4. A passive protective quick disconnect according to claim 1, wherein: the steel wire mesh is pressed by 304 stainless steel wires to form a structure matched with the shape of the mounting groove.
5. A passive protective quick disconnect according to claim 1, wherein: the upper part of the arc channel is provided with a step-shaped avoidance groove; the avoidance grooves are positioned on two sides below the cut-off part; and after the blade of the breaking grid sheet enters the arc channel, the broken cutting part is pushed to bend towards two sides and enter the corresponding avoiding groove.
6. A passive protective quick disconnect according to claim 5 wherein: bending grooves are formed in the bottom surfaces of the connecting positions of the cut-off pieces and the first copper bars and the second copper bars; the bending groove and the avoiding groove are arranged oppositely; the inner wall of one side of the bending groove and the inner wall of the avoidance groove opposite to the bending groove are in the same plane; the inner wall of the other side of the bending groove and the inner wall of the electric arc channel are in the same plane.
7. A passive protective quick disconnect according to claim 1, wherein: before the gas generating device is triggered, the top surface of the breaking grid piece is attached to the energy output end of the gas generating device and the inner wall of the insulating shell.
8. A passive protective quick disconnect according to claim 1, wherein: the cutting part and the blade of the grid-breaking sheet have the same width; the blade end part of the breaking grid sheet is in a sharp knife shape; the blade end of the breaking grid sheet is opposite to the center line of the cutting part.
9. A passive protective quick disconnect according to claim 1 wherein: a stress concentration groove with a downward opening is formed in the center line of the bottom surface of the cutting part; the stress concentration groove is a V-shaped groove which is opened towards the arc channel; the top end of the stress concentration groove is opposite to the end part of the blade of the grid-breaking piece.
10. A passive protective quick disconnect according to claim 1 wherein: also includes a reinforcement; the reinforcing parts are fixedly distributed in the insulating shell outside the gas generating device and the cut-off grid piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221858661.4U CN218039077U (en) | 2022-07-19 | 2022-07-19 | Passive protection type quick breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221858661.4U CN218039077U (en) | 2022-07-19 | 2022-07-19 | Passive protection type quick breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218039077U true CN218039077U (en) | 2022-12-13 |
Family
ID=84384684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221858661.4U Active CN218039077U (en) | 2022-07-19 | 2022-07-19 | Passive protection type quick breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218039077U (en) |
-
2022
- 2022-07-19 CN CN202221858661.4U patent/CN218039077U/en active Active
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