CN218456053U - Active protection type short-circuit protection device - Google Patents
Active protection type short-circuit protection device Download PDFInfo
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- CN218456053U CN218456053U CN202221858442.6U CN202221858442U CN218456053U CN 218456053 U CN218456053 U CN 218456053U CN 202221858442 U CN202221858442 U CN 202221858442U CN 218456053 U CN218456053 U CN 218456053U
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Abstract
The utility model provides an active protection formula short-circuit protection device, include: the arc extinguishing chamber comprises an arc trigger, a gas generating device, a breaking grid piece, an insulating shell, a breaking copper bar, an arc channel and an arc extinguishing chamber; the arc trigger is connected in series with the cut-off copper bar; the gas generating device is used for receiving an external trigger signal and a trigger signal from the arc generator, generating energy after being triggered, pushing the breaking grid piece to move towards the arc channel, and cutting off the corresponding cut-off part by the blade of the breaking grid piece and entering the arc channel; the cutting parts are cut off along the central line of the cutting part and are kept connected with the blade of the breaking grid piece through the root parts of the cutting parts, so that the electric arcs generated by cutting the corresponding cutting parts are extruded to enter the corresponding electric arc channels; the electric arc enters the arc extinguishing 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; the cut-off grid piece body is internally provided with a weight increasing block. The utility model provides the high whole security that opens the ware.
Description
Technical Field
The utility model belongs to the technical field of circuit protection, concretely relates to initiative protection formula short-circuit protection device.
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. The fuse has the advantages of simple structure, convenient use, safety protection in a power distribution system, wide application in power grid protection and electric equipment protection, automatic circuit cutting when short circuit fault or overload occurs to the power grid or the electric equipment, avoidance of electric equipment damage and prevention of accident spreading.
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 is normally through-flowed, current can flow through the through-flow copper bar, and the endurance capacity of the fuse is greatly improved compared with that of a traditional fuse.
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 an arc extinguish chamber containing energy-absorbing substances, so that energy absorption and temperature reduction are realized, and breaking is finally completed.
In the initiating explosive device breaker, the insulation grid sheet breaks the copper bar, which is the most critical link in the breaking process. The material of general grid is insulating material such as plastics or pottery, and intensity is relatively poor in comparing in the copper bar, consequently need make the grid break the copper bar smoothly through special design.
In the prior art, through the laser cutting technique, two stress grooves are respectively cut on the front side and the back side in the middle of the copper bar, when the copper bar is cut off by the grid plate, the copper bar can be disconnected from the stress grooves, the scheme can not ensure that the disconnected copper bar can not enter an electric arc channel, and the descending of an electric arc and a grid plate can be influenced. Simultaneously, because the energy that the initiating explosive device produced in the twinkling of an eye is very big, lead to breaking bars piece high-speed operation, directly caused very big impact to the body of breaking copper bar and breaker shell, be unfavorable for the stability of product, had the safety risk.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art, providing an active protection type short-circuit protection device, and improving the overall safety of the breaker.
The utility model adopts the technical proposal that: an active protective short circuit protection device comprising: the arc extinguishing chamber comprises an arc trigger, a gas generating device, a breaking grid piece, an insulating shell, a breaking copper bar, an arc channel and an arc extinguishing chamber; the gas generating device, the breaking grid piece, the breaking copper bar, the arc channel and the arc extinguish chamber are sequentially arranged in the insulating shell from top to bottom; the arc trigger is connected in series with the cut-off copper bar; the arc trigger is arranged in the insulating shell and is positioned on one side of the cut-off copper bar; the signal output end of the arc trigger is electrically connected with the signal input end of the gas generating device; the arc trigger is used for detecting the current flowing through the cut-off copper bar and generating a trigger signal to trigger the gas generating device when the current exceeds a threshold value;
the breaking grid piece comprises a body and a blade; the two blades are arranged in parallel; the blade extends from the body of the breaking grid plate to the breaking copper bar; the cut-off copper bar is provided with two cut-off gaps with the same width as the cut-off copper bar, and a cut-off part is arranged between the end parts of the opened copper bars corresponding to the two sides of each cut-off gap; the cutting-off piece enables the cut-off copper bar to be conducted; the cutting-off part is respectively arranged opposite to the two blades; before the gas generating device is triggered, the blade end part of the breaking grid sheet is positioned above the corresponding cutting part;
the two arc channels are coaxially and correspondingly arranged with the two blades respectively; the arc extinguishing chambers comprise two arc extinguishing chambers which are coaxially and correspondingly arranged with the two arc channels respectively;
the gas generating device is used for receiving an external trigger signal and a trigger signal from the arc generator, generating energy after being triggered, pushing the cut-off grid sheet to move towards the arc channel, and cutting off the corresponding cut-off part by the blade of the cut-off grid sheet and entering the arc channel; the cutting part is disconnected along the middle line of the cutting part and is kept connected with the disconnected copper bar through the root part of the cutting part;
the blade of the breaking grid piece cuts off the electric arc generated by the corresponding cutting part and is extruded into the corresponding electric arc channel; the electric arc enters the arc extinguishing 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;
and the weight increasing block is arranged in the cut-off grid piece body.
In the technical scheme, 2 mounting grooves are formed in the arc extinguish chamber; the steel wire mesh comprises two steel wire meshes which are respectively clamped in the corresponding mounting grooves; the steel wire mesh is arranged opposite to the outlet of the electric arc channel.
In the technical scheme, the top of the arc channel is provided with an avoidance groove correspondingly matched with the root of the cut-off part; the cut-off part after being cut off is pushed into the avoidance groove by the blade of the grid-breaking piece entering the arc channel.
In the technical scheme, a square bending groove with a downward opening is formed in the bottom surface of the joint of the cut-off copper bar and the cut-off part; the square bending groove and the avoidance groove are correspondingly arranged; the inner wall of the outer side of the square bending groove and the inner wall of the corresponding avoiding groove are on the same plane.
In the technical scheme, the end part of the blade of the breaking grid piece is of a V-shaped structure. The middle line of the lower surface of the cutting part is provided with a stress concentration groove with a downward opening, and the stress concentration groove is opposite to the tip of the end part of the blade of the breaking grid piece.
In the technical scheme, an isolating circuit is arranged among the trigger, the gas generating device and an external device.
In the technical scheme, the top of the break-off grid piece is provided with an installation groove matched with the end part of the output energy of the gas generating device; before the gas generating device is triggered, the end part of the output energy of the gas generating device is arranged in the mounting groove.
In the technical scheme, the end part of the output energy of the gas generating device is attached to the bottom surface of the mounting groove; the end face of the cut-off grid piece close to the gas generating device is attached to the inner wall of the insulating shell.
In the technical scheme, two ends of each blade are provided with limiting plates; the limiting plate vertically extends from the edge of the body of the breaking grid piece to the bottom end of the blade along the edge of the blade; the outer side surface of the bottom of each limiting plate is provided with a wedge-shaped limiting groove; the inner wall of the insulating shell, which is positioned at two sides of the electric arc channel and is opposite to the limiting plate, is provided with a limiting table; the limiting table and the limiting groove are mutually matched and are positioned above one side of the outlet of the arc channel.
In the technical scheme, the weight increasing block is positioned between the mounting groove and the top end of the blade of the grid-breaking sheet.
The utility model has the advantages that: 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 sheet can cut the break copper bar. The cut-off part divided into two parts is further pushed into the avoidance groove by the cut-off grid piece under the action of the cut-off grid piece, so that the motion of the cut-off grid piece is prevented from being influenced, unnecessary electric arcs generated in the execution process of protection actions are prevented, and the safety of the whole device is enhanced. The blade end part 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 on the middle line of the breaking part, the acting force is concentrated in the middle of the breaking part when the breaking grid sheet cuts off the breaking copper bar, the breaking part is guaranteed to break from the middle line, and the breaking part completely enters the avoidance groove. The utility model discloses a set up and dodge the groove of bending that the groove corresponds, leave the space of dodging for the in-process that the cutting off part was buckled to both sides, make it bent more easily. 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.
The utility model discloses an at the inside embedded weight that increases that is equipped with of disconnected bars piece for increase weight under the unchangeable condition of disconnected bars piece keeps original volume, because the thrust that gas generating device produced is unanimous basically, the quality of disconnected bars piece is heavier, and its acceleration that produces under the same thrust is less, and whole functioning speed is slow more, thereby can avoid disconnected bars piece to produce the striking because of the speed is too fast, leads to disconnected bars piece to break and damages. Meanwhile, the process of cutting the copper bar by the breaking grid plate is at the initial stage of the movement of the breaking grid plate, the speed of the breaking grid plate is increased from zero, and the speed is low, so that the weight of the breaking grid plate is changed, the process of cutting the copper bar and the subsequent arcing process of the copper bar are not greatly influenced, and the overall effectiveness of the product effect is effectively ensured.
Meanwhile, the weight increasing block can enhance the overall structural strength of the break gate piece and reduce the risk of breakage. The material of the weight-increasing block can be selected from 304 stainless steel, and sufficient strength and weight are provided. The weight increasing block is concentric with the excircle of the break-off grid piece, the diameter of the weight increasing block is at least more than 4mm smaller than that of the break-off grid piece, the weight increasing block is wrapped by plastic and is not exposed, and the plastic on the periphery of the break-off grid piece has enough strength and cannot be damaged during movement. The weight-increasing block is located in the middle of the solid part at the top of the grid-breaking sheet, and needs to be kept away from the lower surface of the solid part of the grid-breaking sheet by a distance of more than 3mm, so that the root of the blade at the lower part of the grid-breaking sheet has enough strength and does not break during movement and impact.
The utility model discloses a trigger is as initiative trigger function module, can make this breaker detect short-circuit current by oneself under the condition that need not receive outside trigger signal to trigger the breaker part and accomplish the branch and divide, realize not needing the active protection of outside intervention. The gas generating device is connected to an external connector and a trigger, both of which can trigger the gas generating device. The trigger is provided with an isolating circuit among the gas generating device and the external connector, and aims to isolate a high-voltage loop of the trigger part from an external low-voltage loop connected with the external connector and avoid damage to the low-voltage loop.
The utility model discloses a spacing platform and spacing groove's cooperation realizes the limit function to breaking the bars piece, guarantees to break the bars piece down can't continue down or the recoil under the effect of reaction force promptly after to the assigned position, further reinforces the whole security of breaking the ware.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a partial schematic view a of the present invention;
fig. 3 is a schematic view of the breaking grid of the present invention;
fig. 4 is a partial schematic view b of the present invention.
The device comprises a gas generating device 1, a mounting groove 2, an isolating circuit 3, an arc trigger 4, a cutting notch 5, an arc extinguish chamber 6, a steel wire mesh 7, an arc channel 8, a copper bar 9, a blade 10, a grid 11, an insulating shell 12, a weight increasing block 13, a bending groove 14, a avoidance groove 15, an emergency concentration groove 16, a limiting plate 17, a limiting groove 18 and a limiting table 19.
Detailed Description
The invention will be further described in detail with reference to the drawings and the following detailed description, which are not intended to limit the invention.
As shown in fig. 1, the utility model relates to an active protection formula short-circuit protection device, include: the device comprises an arc trigger 4, a gas generating device 1, a breaking grid sheet 11, an insulating shell 12, a breaking copper bar 9, an arc channel 8 and an arc extinguish chamber 6; the gas generating device 1, the breaking grid sheet 11, the breaking copper bar 9, the arc channel 8 and the arc extinguish chamber 6 are sequentially arranged in the insulating shell 12 from top to bottom; the arc trigger 4 is connected in series with the on-off copper bar 9; the arc trigger 4 is arranged in the insulating shell 12 and is positioned on one side of the break copper bar 9; the arc trigger 4 is used for detecting that the current flowing through the cut-off copper bar 9 exceeds a threshold value to generate a trigger signal to trigger the gas generating device 1.
The breaking grid piece 11 comprises a body and a blade 10; the blades 10 comprise two blades which are arranged in parallel; the blade 10 extends from the body of the cut-off grid piece 11 to the cut-off copper bar 9; the cut-off copper bar 9 is provided with two cut-off gaps 5 with the same width as the cut-off copper bar, and a cut-off part is arranged between the corresponding ends of the opened copper bar at two sides of each cut-off gap 5; the cutting-off piece enables the cut-off copper bar 9 to be conducted; the cutting parts are respectively arranged opposite to the two blades 10; before the gas generating device 1 is triggered, the end part of the blade 10 of the breaking grid piece 11 is positioned in the cutting notch 5 above the corresponding cutting part.
The two arc channels 8 are coaxially and correspondingly arranged with the two blades 10 respectively; the arc extinguish chambers 6 are arranged coaxially and correspondingly to the two arc channels 8.
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 and a trigger signal from the arc generator, generating energy after being triggered, pushing the breaking grid piece 11 to move towards the arc channel 8, and cutting off a corresponding cut-off part by the blade 10 of the breaking grid piece 11 and enabling the cut-off part to enter the arc channel 8; the cutting piece is disconnected along the middle line of the cutting piece and is kept connected with the disconnected copper bar 9 through the root of the cutting piece;
the blade 10 of the breaking grid sheet 11 cuts off the electric arc generated by the corresponding cutting part and is extruded into the corresponding electric arc channel 8; the arc enters the arc chute 6 via the arc channel 8; a steel wire mesh 7 for arc extinction is arranged in the arc extinguish chamber 6; the electric arc enters the arc extinguish chamber 6 and then contacts the steel wire mesh 7; the two blades 10 of the breaking grid 11 generate electric arcs after cutting off the cut-off part, the electric arcs respectively enter the corresponding electric arc channels 8 to be elongated and are connected in series to form electric arc voltage higher than system voltage, and then the current on the breaking copper bar 9 is reduced.
And a weighting block 13 is arranged in the body of the breaking grid plate 11. The weight 13 is located between the mounting groove 2 and the top end of the blade 10 of the breaking grid 11. The utility model discloses can control its velocity of motion through the weight of control weight gain piece 13, avoid breaking the striking problem of breaking that 11 fast lead to of disconnected bars piece to and the arc that draws that the speed leads to too slowly divides the disconnected failure problem of branch too slowly. The weight 13 may increase the structural strength of the break-away fence 11, reducing the risk of breakage. The material of the weight 13 may be selected from 304 stainless steel, which provides sufficient strength and weight. The weight increasing block 13 is concentric with the excircle of the break-off grid sheet 11, so that the weight increasing block 13 is not exposed by plastic wrapping of the break-off grid sheet 11, and the plastic on the periphery of the break-off grid sheet 11 has enough strength and cannot be damaged during movement. The upper and lower surfaces of the weight 13 are spaced from the top surface of the break-away fence 11 and the blades 10 at all, ensuring that the roots of the blades 10 below the fence are strong enough not to break during movement and impact.
Specifically, 2 mounting grooves 2 are arranged in the arc extinguish chamber 6; the steel wire mesh 7 comprises two steel wire meshes which are respectively clamped in the corresponding mounting grooves 2; the steel wire mesh 7 is arranged opposite to the outlet of the arc channel 8. The steel wire mesh 7 is formed by pressing 304 stainless steel wires into a special shape, so that the steel wire mesh can be clamped in the inner cavity of the arc extinguish chamber 6, meanwhile, the steel wire mesh has a larger contact area with electric arc, and the energy absorption efficiency is higher. The electric arc is cooled through the steel wire mesh 7, and the whole breaking process is completed after energy absorption.
As shown in fig. 3, the top of the arc channel 8 is provided with an avoiding groove 15 correspondingly matched with the root of the cut-off piece; the cut-off part after being cut off is pushed by the blade 10 of the cut-off grid piece 11 entering the arc channel 8 to enter the avoiding groove 15, so that the blade 10 is avoided, the blade 10 can continuously move downwards, and the condition that the arc extinguishing effect is poor and danger is brought due to blocking is avoided.
A square bending groove 14 with a downward opening is formed in the bottom surface of the joint of the cut-off copper bar 9 and the cut-off part; the square bending groove 14 is arranged corresponding to the avoidance groove 15; the inner wall of the outer side of the square bending groove 14 and the corresponding inner wall of the avoiding groove 15 are on the same plane, and an avoiding space is reserved for the process that the cut-off piece is bent towards two sides after being cut off, so that the cut-off piece is more easily bent, the bent cut-off piece can completely enter the avoiding groove 15, and the descending path of the breaking grid piece 11 is prevented from being blocked.
In the above technical solution, the end of the blade 10 of the opening grid 11 is a V-shaped structure. A stress concentration groove 16 which is opened downwards is arranged at the midline of the lower surface of the cutting part, and the stress concentration groove 16 is opposite to the tip of the end part of the blade 10 of the breaking grid sheet 11. Through the cooperation of the tip of the blade 10 and the emergency concentrated groove, stress concentration is generated at the center line of the cut-off part, and the cut-off grid piece 11 is easier to cut off the cut-off part from the middle position, so that the cut-off part can be further ensured to completely enter the avoidance groove 15.
In the above technical solution, an isolation circuit 3 is provided between the trigger, the gas generating apparatus 1 and an external device. The trigger part is used for detecting the current and generating an arc when the current exceeds a threshold value, triggering the gas generating device 1. The trigger is used as an active starting function module, so that the breaker can automatically detect short-circuit current without receiving an external trigger signal, and trigger the breaker part to complete breaking, thereby realizing active protection without external intervention. The gas generator 1 is connected to an external connector and a trigger, both of which can trigger the gas generator 1. An isolating circuit 3 is arranged between the trigger, the gas generating device 1 and the external connector, and aims to isolate a high-voltage loop of the trigger part from an external low-voltage loop connected with the external connector and avoid damage to the low-voltage loop.
In the technical scheme, the end face of the break-off grid sheet 11 close to the gas generating device 1 is provided with a mounting groove 2 matched with the end part of the gas generating device 1 for outputting energy; the end part of the gas generating device 1 for outputting energy is arranged in the mounting groove 2. The end part of the gas generating device 1 for outputting energy is attached to the bottom surface of the mounting groove 2. The end surface of the break-off grid plate 11 close to the gas generating device 1 is attached to the inner wall of the insulating shell 12. The breaking grid 11 is closely attached to the gas generating device 1 in the initial state, when the gas generating device 1 is triggered, a large amount of gas is generated, the energy of the gas is amplified by narrow space description, and the breaking grid 11 is pushed to move.
As shown in fig. 3 and 4, the two ends of each blade 10 are provided with a limit plate 17; the length of the blade is greater than the length of the cutting notch. The limiting plate is positioned on the outer side of the corresponding cut-off copper bar. The limit plate 17 extends vertically from the edge of the body of the breaking fence 11 to the bottom end of the blade 10. The bottom outer surface of each limit plate 17 is provided with a wedge-shaped limit groove 18. And limiting tables 19 are arranged on the inner walls of the insulating shell 12 which are positioned at two sides of the arc channel 8 and are opposite to the limiting plates 17. The limiting table 19 and the limiting groove 18 are mutually matched and are positioned above one side of the outlet of the arc channel 8. In the descending process of the breaking grid plate 11, the strong acting force of the gas generating device 1 enables the breaking grid plate 11 to extrude the limiting table 19 and enables the limiting table 19 to enter the limiting groove 18. However, after the limiting table 19 enters the limiting groove 18 and is clamped, the cut-off grid sheet 11 is limited and cannot move downwards or return, so that the cut-off grid sheet 11 is limited, the cut-off grid sheet 11 cannot move downwards or return under the action of a reaction force after moving downwards to a specified position, and the overall safety of the cut-off device is further enhanced.
Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. An active protection type short-circuit protection device, comprising: the arc extinguishing device comprises an arc trigger, a gas generating device, a breaking grid sheet, an insulating shell, a breaking copper bar, an arc channel and an arc extinguishing chamber; the gas generating device, the breaking grid piece, the breaking copper bar, the arc channel and the arc extinguish chamber are sequentially arranged in the insulating shell from top to bottom; the arc trigger is connected in series with the cut-off copper bar; the arc trigger is arranged in the insulating shell and is positioned on one side of the cut-off copper bar; the signal output end of the arc trigger is electrically connected with the signal input end of the gas generating device;
the breaking grid piece comprises a body and a blade; the two blades are arranged in parallel; the blade extends from the body of the cut-off grid piece to the cut-off copper bar; the cutting copper bar is provided with two cutting gaps with the same width as the cutting copper bar, and a cutting part is arranged between the end parts of the corresponding opening copper bars at the two sides of each cutting gap; the cutting-off piece enables the cut-off copper bar to be conducted; the cutting-off part is respectively opposite to the two blades; before the gas generating device is triggered, the blade end part of the breaking grid sheet is positioned above the corresponding cutting part;
the two arc channels are coaxially and correspondingly arranged with the two blades respectively; the arc extinguishing chambers are coaxially and correspondingly arranged with the two arc channels respectively;
the gas generating device is used for receiving a trigger signal from an external device and a trigger signal from the arc generator, generating energy after being triggered, pushing the cut-off grid sheet to move towards the arc channel, and cutting off the corresponding cut-off part by the blade of the cut-off grid sheet and enabling the cut-off part to enter the arc channel; the cutting piece is disconnected along the middle line of the copper bar and is connected with the disconnected copper bar through the root of the cutting piece;
the blade of the breaking grid piece cuts off the electric arc generated by the corresponding cutting part and is extruded into the corresponding electric arc channel; the electric arc enters the arc extinguishing 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;
and the weight increasing block is arranged in the cut-off grid piece body.
2. An active protection type short-circuit protection device according to claim 1, wherein: 2 mounting grooves are formed in the arc extinguish chamber; the steel wire mesh comprises two steel wire meshes which are respectively clamped in the corresponding mounting grooves; the steel wire mesh is arranged opposite to the outlet of the electric arc channel.
3. The active short-circuit protection device according to claim 1, wherein: the top of the arc channel is provided with an avoidance groove correspondingly matched with the root of the cut-off part; the cut-off part after being cut off is pushed into the avoidance groove by the blade of the grid-breaking piece entering the arc channel.
4. An active protection type short-circuit protection device according to claim 3, wherein: a square bending groove with a downward opening is formed in the bottom surface of the joint of the cut-off copper bar and the cut-off part; the bending groove and the avoiding groove are correspondingly arranged; the inner wall of the outer side of the bending groove and the inner wall of the corresponding avoiding groove are on the same plane.
5. An active protection type short-circuit protection device according to claim 1, wherein: the end part of the blade of the breaking grid piece is of a V-shaped structure; and a stress concentration groove with a downward opening is formed in the center line of the lower surface of the cutting part, and the stress concentration groove is opposite to the tip of the blade end of the breaking grid piece.
6. The active short-circuit protection device according to claim 1, wherein: an isolating circuit is arranged between the trigger and the gas generating device.
7. An active protection type short-circuit protection device according to claim 1, wherein: the top of the cut-off grid sheet is provided with an installation groove matched with the end part of the output energy of the gas generating device; before the gas generating device is triggered, the end part of the output energy of the gas generating device is arranged in the mounting groove.
8. The active short-circuit protection device according to claim 7, wherein: the end part of the gas generating device for outputting energy is attached to the bottom surface of the mounting groove; the end face of the cut-off grid piece close to the gas generating device is attached to the inner wall of the insulating shell.
9. An active protection type short-circuit protection device according to claim 8, wherein: the weight increasing block is positioned between the mounting groove and the top end of the blade of the grid breaking piece.
10. An active protection type short-circuit protection device according to claim 1, wherein: limiting plates are arranged at two ends of each blade; the limiting plate vertically extends from the edge of the body of the grid-breaking piece to the bottom end of the blade along the edge of the blade; a wedge-shaped limiting groove is formed in the outer side surface of the bottom of each limiting plate; the inner wall of the insulating shell, which is positioned at two sides of the electric arc channel and is opposite to the limiting plate, is provided with a limiting table; the limiting table and the limiting groove are mutually matched and are positioned above one side of the outlet of the arc channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221858442.6U CN218456053U (en) | 2022-07-19 | 2022-07-19 | Active protection type short-circuit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221858442.6U CN218456053U (en) | 2022-07-19 | 2022-07-19 | Active protection type short-circuit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218456053U true CN218456053U (en) | 2023-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221858442.6U Active CN218456053U (en) | 2022-07-19 | 2022-07-19 | Active protection type short-circuit protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218456053U (en) |
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2022
- 2022-07-19 CN CN202221858442.6U patent/CN218456053U/en active Active
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