CN218274498U

CN218274498U - Arc extinction module of quick-opening high-breaking miniature circuit breaker

Info

Publication number: CN218274498U
Application number: CN202221642305.9U
Authority: CN
Inventors: 谭青松; 许可
Original assignee: Wenzhou Nagul Power Technology Co ltd
Current assignee: Wenzhou Nagul Power Technology Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2023-01-10
Anticipated expiration: 2032-06-28

Abstract

The utility model relates to a high disconnected miniature circuit breaker's of breaking of quick separating brake arc extinction module, including conductive elastic sheet, the arc extinguish chamber, PTC subassembly and arc extinguishing bars subassembly, conductive elastic sheet is including being used for the extension that links to each other with auxiliary contact complex conductive part and with the PTC subassembly, the extension passes through the lower extreme bending type of conductive part, the arc extinguish chamber of arc extinguish chamber including the installation cavity that is used for installing the PTC subassembly and being used for installing the arc extinguishing bars subassembly, the installation cavity corresponds casing dismouting direction opening setting, the installation cavity center is provided with the draw-in groove, draw-in groove and installation cavity diapire parallel arrangement, PTC subassembly both sides are inserted and are located in the draw-in groove, both sides are provided with first spring leaf and second spring leaf respectively about the PTC subassembly, first spring leaf sets up in PTC subassembly below, the second spring leaf sets up in PTC subassembly top. By adopting the technical scheme, the PTC component is matched with the arc-extinguishing grid component, so that the arc-extinguishing capacity is improved; the modular assembly is convenient and quick to install; the structure design is reasonable, the performance is reliable, the production cost is low and the practicability is good.

Description

Arc extinction module of quick-opening high-breaking miniature circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field especially relates to a quick separating brake high divides disconnected miniature circuit breaker's arc extinction module.

Background

The existing miniature circuit breaker comprises an operating system, an arc extinguishing system, a tripping mechanism, a contact system, a shell, an operating handle and the like, and a main contact of the miniature circuit breaker is manually operated or electrically switched on. After the main contact is closed, the free tripping mechanism locks the main contact at the closing position. The coil of the over-current release and the thermal element of the thermal release are connected with the main circuit in series, and the coil of the under-voltage release is connected with the power supply in parallel. When the circuit is short-circuited or seriously overloaded, the armature of the overcurrent release is attracted, so that the free release mechanism acts, and the main contact breaks the main circuit. When the circuit is overloaded, the thermal element of the thermal release heats up to bend the bimetallic strip and push the free release mechanism to act. When the circuit is under-voltage, the armature of the under-voltage release releases, and the free release mechanism also acts.

Only adopt the arc extinguishing bars subassembly in the current circuit breaker structure, arc extinguishing ability is weak, if electric arc can not get into the bars piece rapidly and cool off and cut, stays for a long time and lasts the burning between the contact, causes the sound contact serious ablation, the material loss, and contact surface local metal liquid drop splashes, finally leads to breaking failure. Therefore, how to improve the arc extinguishing capability of the arc extinguishing mechanism becomes a technical problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

To sum up, for overcoming prior art's not enough, the utility model provides a quick separating brake high divides disconnected miniature circuit breaker's arc extinction module.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an arc extinguishing module of high disconnected miniature circuit breaker of separating floodgate fast, includes conductive elastic piece, arc extinguishing cover, PTC subassembly and arc extinguishing bars subassembly, conductive elastic piece including be used for with auxiliary contact complex conductive part and with the extension that the PTC subassembly links to each other, the extension is through the lower extreme bending type of conductive part shaping, the arc extinguishing cover is including being used for the installation cavity of PTC subassembly and the arc extinguishing chamber that is used for installing the arc extinguishing bars subassembly, the installation cavity corresponds casing dismouting direction opening setting, the installation cavity center is provided with and is used for the installation the draw-in groove of PTC subassembly, draw-in groove and installation cavity diapire parallel arrangement, PTC subassembly both sides tip are inserted and are located in the draw-in groove, both sides are provided with first spring leaf and second spring leaf respectively about the PTC subassembly, first spring leaf set up in PTC subassembly below and with extension body coupling, the second spring leaf set up in PTC subassembly top be used for with tripping coil assembly elastic connection.

By adopting the technical scheme, the PTC component is adopted in the arc extinction mechanism, the resistance value of the PTC component is small in the normal state, and is generally several ohms to dozens of ohms, when short-circuit large current passes, the instantaneous resistance becomes an index, the larger the short-circuit current is, the shorter the reaction time is, and the short-circuit current 50KA can be clamped below 1KA in 0.5 ms; in the breaking process of the conductive elastic sheet, the elastic force generated by bending is applied to the auxiliary contacts, so that the moving contact and the static contact of the circuit breaker are more quickly broken, the purpose of quick breaking is realized, the breaking speed of the circuit breaker is improved, the distance between the contacts is greatly increased in the same time, the electric field intensity is reduced, and the conductive elastic sheet is matched with an arc-extinguishing grid assembly, so that the circuit breaker can play a powerful arc-extinguishing role in a shorter time, a gap after arc extinguishing can obtain higher insulating strength in a shorter time, and the arc extinguishing capability is improved; meanwhile, the arc-extinguishing grid and the PTC component are assembled in a modularized manner through the integrally formed arc-extinguishing cover, so that the installation is convenient and rapid; the PTC component is positioned through the first spring piece and the second spring piece, and meanwhile, the installation stability of the PTC component is further improved through matching with the clamping groove; the first spring piece is used for realizing the breaking of the auxiliary contact, and the second spring piece is used for realizing the elastic connection of the tripping coil assembly so as to realize the series connection of the auxiliary circuit; the installation cavity corresponds casing dismouting direction opening setting, promptly the installation cavity corresponds the direction of static contact, the arc-extinguishing cover plays the effect of separation protection to the installation cavity, can prevent that electric arc from influencing the PTC subassembly, structural design is reasonable, simple structure, it is easy to make, dependable performance, low in production cost and practicality are good.

The utility model discloses further set up: the PTC subassembly includes the contact piece and sets up the PTC component on two sides about the contact piece, the position that diapire and upper wall are pressed close to the installation cavity is provided with the installation slot respectively, the installation slot with draw-in groove parallel arrangement, the installation slot draw-in groove one end all opens the setting, first spring leaf include with the installation department of installation slot looks adaptation, the card portion that is used for connecting the PTC component and be used for the first connecting portion be connected with the extension, the second spring leaf include with the installation department of installation slot looks adaptation, the card portion that is used for connecting the PTC component and be used for the second connecting portion be connected with the trip coil subassembly.

By adopting the technical scheme, 2 PTC elements are adopted, compared with a plurality of PTC elements, the structure is simplified, the size of the module is reduced, the PTC element module can be used for a miniature circuit breaker, the structure is more reasonable, and PTC elements of different types can be adopted according to requirements, so that different current limiting capacities are achieved; the installation slot is arranged, the first spring piece and the second spring piece are installed in a clamping mode, and compared with welding, disassembly and replacement are convenient, so that the service life of a product is prolonged, and meanwhile, the installation is convenient and rapid, the stability of the first spring piece and the second spring piece is improved due to the arrangement of the installation slot, the opening is arranged towards the inner wall direction, assembly is carried out from the rear of the module, after the assembly of the module is completed, the arc extinction module is arranged in the shell, the shell plays a role in protecting the module, and the installation stability of the PTC component, the first spring piece and the second spring piece is further improved; the PTC component is connected with the clamping parts on the two sides, so that the PTC component is positioned, and the stability of the PTC component is improved; through first connecting portion and second connecting portion respectively with conducting strip, trip coil subassembly be connected, but first spring leaf and conducting strip integrated into one piece need not extra connecting piece, make things convenient for arc extinction mechanism integration, modularization, improve stability, while easy to assemble.

The utility model discloses further set up: the arc extinguishing chamber is provided with the type of falling L slot that is used for installing the second connecting portion above the open end that corresponds the installation slot that is close to the upper wall, and the type of falling L slot upper end opening sets up, the type of falling L slot is linked together with corresponding installation slot, the type of falling L slot and second connecting portion looks adaptation.

Through adopting above-mentioned technical scheme, when inserting the second spring leaf from the installation cavity rear end and locating on the arc extinguishing cover, the installation slot of locating in the installation cavity is inserted to the installation department of second spring leaf, and second connecting portion set up in the arc extinguishing cover upper end and link to each other with trip coil assembly's bottom, accomplish the equipment back when the second spring leaf, the thickness and the arc extinguishing cover shell parallel and level of second connecting portion (promptly the type of falling L slot with second connecting portion looks adaptation) for the module is changeed the installation with the casing, and is more stable.

The utility model discloses further set up: the second connecting portion are arranged at the upper end of the arc extinguishing chamber and provided with arched connecting points which are in elastic contact with the magnet yoke.

By adopting the technical scheme, the arc extinguishing chamber is convenient to clamp and install, is in elastic contact, and is more reasonable in arrangement and reliable in work.

The utility model discloses further set up: the arc extinguishing chamber is provided with the installation of being used for the installation below the open end of the installation slot that the arc extinguishing chamber corresponds and is close to the diapire the L type socket of first connecting portion, the upper end of L type socket is linked together with the open end of the installation slot that is close to the diapire, the lower extreme of L type socket with the arc extinguishing chamber is linked together, the lower extreme of L type socket corresponds one side opening setting of extension.

By adopting the technical scheme, the first connecting part is bent and inserted into the arc extinguishing chamber, the first connecting part is hidden at the rear end of the arc extinguishing chamber, and when the first connecting part is arranged in the shell of the circuit breaker, the stability of connection of the first spring piece is further improved through the protection of the shell and the arc extinguishing chamber, and the first spring piece is not easy to damage; the lower end of the L-shaped socket corresponds to an opening on one side of the extending part, and the opening is formed by integrally forming the first spring piece and the conductive elastic piece, so that the conductive elastic piece is convenient to mount.

The utility model discloses further set up: the lower end of the first connecting portion is inserted into an arc extinguishing cavity through an L-shaped socket, the arc extinguishing cavity corresponds to the opening in the direction of the extending portion, one end of the extending portion stretches into the arc extinguishing cavity from the opening and is connected with one side of the lower end of the first connecting portion, the arc extinguishing cavity and the first connecting portion are integrally formed, and the arc extinguishing grid assembly is arranged below the first connecting portion.

Through adopting above-mentioned technical scheme, the lower extreme of first connecting portion is inserted through L type socket and is located the arc extinguishing chamber, leads to the arc extinguishing chamber fast with the electric arc that the contact separation produced for arc extinguishing time has improved disjunction ability, has protected the contact, prevents simultaneously that electric arc from getting into the installation cavity, has protected the PTC subassembly.

The following description of the embodiments of the present invention refers to the accompanying drawings and examples.

Drawings

Fig. 1 is a perspective view 1 of an embodiment of the present invention;

fig. 2 is a perspective view 2 of an embodiment of the present invention;

fig. 3 is an exploded view of an embodiment of the present invention;

reference numerals: 1. the arc extinguishing cover comprises an arc extinguishing cover, 11 installation cavities, 111 clamping grooves, 112 installation slots, 113 inverted L-shaped slots, 114.L-shaped sockets, 12 arc extinguishing cavities, 2.PTC components, 21 first spring pieces, 211 installation portions, 212 clamping portions, 213 first connection portions, 22 second spring pieces, 221 second connection portions, 222 connection points, 23 contact pieces, 24.PTC components, 3 arc extinguishing grid components, 4 conductive spring pieces, 41 conductive portions and 42 extension portions.

Detailed Description

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Referring to fig. 1-3, the arc extinguishing module of the quick opening high breaking micro circuit breaker disclosed in this embodiment includes an arc extinguishing chamber 1, a PTC component 2, an arc extinguishing grid component 3 and a conductive elastic sheet 4, the conductive elastic sheet 4 includes a conductive portion 41 for cooperating with an auxiliary contact and an extension portion 42 connected to the PTC component 2, the extension portion 42 is formed by bending the lower end of the conductive portion 41, the arc extinguishing chamber 1 includes an installation cavity 11 for installing the PTC component 2 and an arc extinguishing cavity 12 for installing the arc extinguishing grid component 3, the installation cavity 11 is disposed corresponding to an opening in a disassembling and assembling direction of a housing, a clamping groove 111 for installing the PTC component 2 is disposed in the center of the installation cavity 11, the clamping groove 111 is disposed parallel to the bottom wall of the installation cavity 11, end portions at two sides of the PTC component 2 are inserted into the clamping groove 111, a first spring sheet 21 and a second spring sheet 22 are disposed at upper and lower sides of the PTC component 2, the first spring sheet 21 is disposed below the PTC component 2 and integrally connected to the extension portion 42, and the second spring sheet 22 is disposed above the PTC component 2 for elastically connecting to a tripping coil component.

The embodiment further provides that: PTC subassembly 2 includes contact piece 23 and sets up the PTC 24 on two sides about contact piece 23, the position that diapire and upper wall are pressed close to installation cavity 11 is provided with installation slot 112 respectively, installation slot 112 with draw-in groove 111 parallel arrangement, installation slot 112 the all opening settings of draw-in groove 111 one end, first spring leaf 21 include with the installation department 211 of installation slot 112 looks adaptation, the first connecting portion 213 that is used for connecting PTC 24's card portion 212 and is used for being connected with extension 42, second spring leaf 22 include with the installation department 211 of installation slot 112 looks adaptation, the card portion 212 that is used for connecting PTC 24 and the second connecting portion 221 that is used for being connected with trip coil assembly.

The embodiment further provides that: the arc extinguishing chamber 1 is provided with an inverted L-shaped slot 113 for installing the second connecting part 221 above the opening end of the installation slot 112 close to the upper wall, the upper end of the inverted L-shaped slot 113 is provided with an opening, the inverted L-shaped slot 113 is communicated with the corresponding installation slot 112, and the inverted L-shaped slot 113 is matched with the second connecting part 221.

The embodiment further provides that: the second connection portion 221 is provided at the upper end of the arc-extinguishing chamber 1, and the second connection portion 221 is provided with a connection point 222 for arching in elastic contact with the yoke.

The embodiment further provides that: the arc-extinguishing chamber 1 is provided with an L-shaped socket 114 used for installing the first connecting portion 213 below the opening end of the installation slot 112 close to the bottom wall, the upper end of the L-shaped socket 114 is communicated with the opening end of the installation slot 112 close to the bottom wall, the lower end of the L-shaped socket 114 is communicated with the arc-extinguishing chamber 12, and the lower end of the L-shaped socket 114 corresponds to the opening on one side of the extending portion 42.

The embodiment further provides that: the lower end of the first connecting portion 213 is inserted into the arc extinguishing chamber 12 through the L-shaped insertion opening 114, the arc extinguishing chamber 12 is arranged corresponding to the opening in the direction of the extending portion 42, one end of the extending portion 42 extends into the arc extinguishing chamber 12 from the opening and is connected with one side of the lower end of the first connecting portion 213, the two are integrally formed, and the arc extinguishing bar assembly 3 is arranged below the first connecting portion 213.

The above-mentioned "between" does not only mean between orientations and positions, but also means between the interactions of different parts.

In the description herein, it will be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings to simplify the description of the present invention, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Although the terms of the arc-extinguishing chamber 1, the mounting cavity 11, the card slot 111, the mounting slot 112, the inverted-L slot 113, the L-shaped socket 114, the arc-extinguishing chamber 12, the PTC component 2, the first spring plate 21, the mounting portion 211, the card portion 212, the first connecting portion 213, the second spring plate 22, the second connecting portion 221, the connection point 222, the contact piece 23, the PTC component 24, the arc-extinguishing grid component 3, the conductive elastic piece 4, the conductive portion 41, the extending portion 42, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a quick separating brake high divides disconnected miniature circuit breaker's arc extinction module which characterized in that: including conductive elastic sheet, arc extinguishing cover, PTC subassembly and arc extinguishing bars subassembly, conductive elastic sheet including be used for with auxiliary contact complex conductive part and with the extension that the PTC subassembly links to each other, the extension passes through the lower extreme bending type of conductive part, the arc extinguishing cover is including being used for the installation cavity of PTC subassembly and the arc extinguishing chamber that is used for installing the arc extinguishing bars subassembly, the installation cavity corresponds casing dismouting direction opening setting, the installation cavity center is provided with and is used for the installation the draw-in groove of PTC subassembly, draw-in groove and installation cavity diapire parallel arrangement, PTC subassembly both sides tip are inserted and are located in the draw-in groove, both sides are provided with first spring leaf and second spring leaf respectively about the PTC subassembly, first spring leaf set up in PTC subassembly below and with extension body coupling, the second spring leaf set up in PTC subassembly top be used for with trip coil subassembly elastic connection.

2. The arc extinction module of the rapid opening high breaking micro breaker of claim 1, characterized in that: the PTC subassembly includes the contact piece and sets up the PTC component on two sides about the contact piece, the position that diapire and upper wall are pressed close to the installation cavity is provided with the installation slot respectively, the installation slot with draw-in groove parallel arrangement, the installation slot draw-in groove one end all opens the setting, first spring leaf include with the installation department of installation slot looks adaptation, the card portion that is used for connecting the PTC component and be used for the first connecting portion be connected with the extension, the second spring leaf include with the installation department of installation slot looks adaptation, the card portion that is used for connecting the PTC component and be used for the second connecting portion be connected with the trip coil subassembly.

3. The arc extinction module of the quick opening high breaking miniature circuit breaker of claim 2, characterized in that: the arc extinguishing chamber is provided with the type of falling L slot that is used for installing the second connecting portion above the open end that corresponds the installation slot that is close to the upper wall, and the type of falling L slot upper end opening sets up, the type of falling L slot is linked together with corresponding installation slot, the type of falling L slot and second connecting portion looks adaptation.

4. The arc extinction module of the rapid opening high breaking micro breaker as claimed in claim 2, wherein: the second connecting portion are arranged at the upper end of the arc extinguishing chamber and provided with arched connecting points which are in elastic contact with the magnetic yoke.

5. The arc extinction module of the rapid opening high breaking micro breaker as claimed in claim 2, wherein: the arc extinguishing chamber is provided with the installation of being used for the installation below the open end of the installation slot that the arc extinguishing chamber corresponds and is close to the diapire the L type socket of first connecting portion, the upper end of L type socket is linked together with the open end of the installation slot that is close to the diapire, the lower extreme of L type socket with the arc extinguishing chamber is linked together, the lower extreme of L type socket corresponds one side opening setting of extension.

6. The arc extinction module of the rapid opening high breaking micro breaker of claim 5, characterized in that: the lower extreme of first connecting portion inserts through L type socket and locates in the arc extinguishing chamber, the arc extinguishing chamber corresponds extension direction opening sets up, extension one end stretches into from the opening part the arc extinguishing chamber links to each other with one side of the lower extreme of first connecting portion, both integrated into one piece, the arc extinguishing bars subassembly set up in the below of first connecting portion.