阅读说明：本技术 一种灭弧断路装置 (Arc extinguishing and breaking device ) 是由 梁嘉年 徐启锋 方津 王志科 杨燕槟 欧阳书远 赖志杨 陈伙荣 于 2021-08-20 设计创作，主要内容包括：本发明涉及电力系统保护技术领域,尤其涉及一种灭弧断路装置,包括安装壳体、静触头、动触头和绝缘灭弧件；安装壳体具有沿第一方向设置的第一容纳腔和沿第二方向设置并连通至第一容纳腔的第二容纳腔；静触头设置于第一容纳腔；动触头沿第一容纳腔的延伸方向移动设置于第一容纳腔,动触头能够连接于静触头或与静触头分离以接通或断开电路,动触头与静触头连接处正对第二容纳腔；绝缘灭弧件沿第二容纳腔的延伸方向移动设置于第二容纳腔,当动触头与静触头分离时,绝缘灭弧件能够移动至动触头与静触头之间以隔绝电弧放电,本发明提供的灭弧断路装置通过绝缘件可以有效的切断空气间隔的电弧作用,保护动触头和静触头不被氧化,保持良好的导电特性。(The invention relates to the technical field of power system protection, in particular to an arc-extinguishing breaking device which comprises an installation shell, a static contact, a moving contact and an insulating arc-extinguishing member, wherein the installation shell is provided with a fixed contact and a fixed contact; the mounting shell is provided with a first accommodating cavity arranged along a first direction and a second accommodating cavity arranged along a second direction and communicated with the first accommodating cavity; the static contact is arranged in the first accommodating cavity; the moving contact is movably arranged in the first accommodating cavity along the extending direction of the first accommodating cavity, can be connected with the static contact or separated from the static contact so as to connect or disconnect a circuit, and the connection position of the moving contact and the static contact is opposite to the second accommodating cavity; the insulating arc extinguishing part is movably arranged in the second accommodating cavity along the extending direction of the second accommodating cavity, and when the moving contact is separated from the static contact, the insulating arc extinguishing part can move between the moving contact and the static contact to isolate arc discharge.)

1. An arc suppressing circuit interrupting device comprising;

the mounting shell is provided with a first accommodating cavity (1) arranged along a first direction and a second accommodating cavity (2) arranged along a second direction and communicated with the first accommodating cavity (1);

the static contact (3) is arranged in the first accommodating cavity (1);

the moving contact (4) is movably arranged in the first accommodating cavity (1) along the extending direction of the first accommodating cavity (1), the moving contact (4) can be connected to the static contact (3) or separated from the static contact (3) to connect or disconnect a circuit, and the joint of the moving contact (4) and the static contact (3) is opposite to the second accommodating cavity (2);

and the insulating arc extinguishing part (5) is arranged in the second accommodating cavity (2) along the extending direction of the second accommodating cavity (2) in a moving mode, and when the moving contact (4) is separated from the static contact (3), the insulating arc extinguishing part (5) can move to the position between the moving contact (4) and the static contact (3) to isolate arc discharge.

2. An arc-extinguishing circuit breaker device according to claim 1, further comprising a trigger component (6), wherein the trigger component (6) is disposed in the mounting housing, a tension spring (41) is disposed at an end of the movable contact (4) away from the fixed contact (3), a compression spring (51) is disposed at an end of the insulating arc-extinguishing member (5) away from a connection between the movable contact (4) and the fixed contact (3), the trigger component (6) has a first limit end (601) and a second limit end (602), the first limit end (601) abuts against the movable contact (4) so that the movable contact (4) is connected to the fixed contact (3), the second limit end (602) abuts against the insulating arc-extinguishing member (5) so that the insulating arc-extinguishing member (5) does not extend out of the second accommodating cavity (2), and when a voltage is overloaded, the trigger component (6) releases the limit of the movable contact (4) and the insulating arc-extinguishing member (5), the moving contact (4) is separated from the static contact (3) under the action of the tension spring (41), and the insulating arc extinguishing part (5) moves to a position between the moving contact (4) and the static contact (3) under the action of the pressure spring (51).

3. An arc-extinguishing circuit breaker device according to claim 2, characterized in that the triggering assembly (6) comprises a release (61), a linkage (62) and a latch (63), the release (61) is connected to the linkage (62), the first limiting end (601) is located at the linkage (62), the second limiting end (602) is located at the latch (63), one end of the latch (63) far away from the first limiting end (601) abuts against the linkage (62), and when the voltage is overloaded, the release (61) can move in the second direction to drive the linkage (62) to be far away from the movable contact (4), and simultaneously the latch (63) moves in the first direction relative to the linkage (62) to be far away from the insulating arc-extinguishing member (5).

4. An arc suppressing circuit interrupting device according to claim 3 wherein the linkage member (62) comprises an abutting plate (621) and a limiting plate (622) which are perpendicular to each other, the trip unit (61) is connected to the abutting plate (621), the first limiting end (601) is located at the limiting plate (622), and the latch tongue (63) abuts against the limiting plate (622).

5. An arc-extinguishing circuit breaking device according to claim 4, characterized in that the limiting plate (622) is provided with a guide projection (6221), the latch tongue (63) abuts against the guide projection (6221), and when the linkage member (62) moves along the first direction, the latch tongue (63) slides down from the guide projection (6221) and abuts against the surface of the linkage member (62) to separate from the limiting of the insulating arc-extinguishing member (5).

6. An arc-extinguishing circuit-breaking device according to claim 4, characterized in that the end of the limiting plate (622) remote from the first limiting end (601) is provided with a return spring (6222).

7. An arc-extinguishing circuit breaker device according to claim 2, characterized in that the movable contact (4) is provided with a first clamping protrusion (42), and the first limiting end (601) is clamped in the first clamping protrusion (42).

8. An arc-extinguishing circuit-breaking device according to claim 2, characterized in that the insulating arc-extinguishing member (5) is provided with a second clamping projection (52), and the second limiting end (602) is clamped in the second clamping projection (52).

9. An arc-extinguishing circuit-breaking device according to claim 2, characterized in that the insulating arc-extinguishing member (5) is provided with a return handle (53).

10. An arc extinguishing breaking device according to any one of claims 1 to 9, characterized in that it also comprises a manual closing switch arranged on the periphery of the mounting casing, said manual closing switch being able to move the movable contact (4) to make or break the electric circuit.

Technical Field

The invention relates to the technical field of power system protection, in particular to an arc extinguishing and breaking device.

Background

In the low-voltage air circuit breaker, an arc extinguishing medium is air, but actually, an arc still has certain conductivity in the air, so that after a contact of the low-voltage circuit breaker is tripped and opened for many times, oxides are generated on the surface of the contact, the contact resistance of the contact is increased, the current carrying temperature is increased, the oxidation of the contact is further accelerated due to the temperature rise, the damage of a low-voltage short-circuit device can be caused due to the vicious cycle, and even accidents such as fire and the like can occur.

Disclosure of Invention

The invention aims to provide an arc-extinguishing breaking device which can effectively block arc discharge in the air at the circuit breaking position and prevent a contact from being oxidized.

In order to achieve the purpose, the invention adopts the following technical scheme:

an arc quenching circuit breaker device comprising;

the mounting shell is provided with a first accommodating cavity arranged along a first direction and a second accommodating cavity arranged along a second direction and communicated to the first accommodating cavity;

the static contact is arranged in the first accommodating cavity;

the moving contact is movably arranged in the first accommodating cavity along the extending direction of the first accommodating cavity, can be connected with the static contact or separated from the static contact so as to connect or disconnect a circuit, and the connection part of the moving contact and the static contact is opposite to the second accommodating cavity;

and the insulating arc extinguishing part is movably arranged in the second accommodating cavity along the extending direction of the second accommodating cavity, and when the moving contact is separated from the static contact, the insulating arc extinguishing part can be moved to a position between the moving contact and the static contact to isolate arc discharge.

Preferably, the arc-extinguishing breaking device further comprises a triggering assembly, the triggering assembly is arranged in the mounting shell, a tension spring is arranged at one end of the moving contact far away from the static contact, a pressure spring is arranged at one end of the insulating arc-extinguishing member far away from the joint of the moving contact and the static contact, the trigger component is provided with a first limit end and a second limit end, the first limit end is abutted against the moving contact so that the moving contact is connected with the static contact, the second limit end abuts against the insulating arc extinguishing piece to prevent the insulating arc extinguishing piece from extending out of the second accommodating cavity, and when the voltage is overloaded, the trigger assembly releases the limit of the moving contact and the insulating arc extinguishing piece, the moving contact is separated from the static contact under the action of the tension spring, and the insulating arc extinguishing part moves to a position between the moving contact and the static contact under the action of the pressure spring.

Preferably, the trigger assembly includes a release, a linkage member and a lock tongue, the release is connected to the linkage member, the first limit end is located at the linkage member, the second limit end is located at the lock tongue, one end of the lock tongue, which is far away from the first limit end, abuts against the linkage member, when the voltage is overloaded, the release can move along the second direction to drive the linkage member to be far away from the movable contact, and meanwhile, the lock tongue moves relative to the linkage member along the first direction to be far away from the insulating arc extinguishing member.

Preferably, the linkage piece comprises an abutting plate and a limiting plate which are perpendicular to each other, the release is connected to the abutting plate, the first limiting end is located on the limiting plate, and the lock tongue abuts against the limiting plate.

Preferably, the limiting plate is provided with a guide protrusion, the lock tongue abuts against the guide protrusion, and when the linkage member moves along the first direction, the lock tongue slides down from the guide protrusion to abut against the surface of the linkage member so as to separate from the limit of the insulating arc extinguishing member.

Preferably, one end of the limiting plate, which is far away from the first limiting end, is provided with a return spring.

Preferably, the moving contact is provided with a first clamping protrusion, and the first limiting end is clamped in the first clamping protrusion.

Preferably, the insulating arc extinguishing part is provided with a second clamping protrusion, and the second limiting end is clamped in the second clamping protrusion.

Preferably, the insulating arc extinguishing piece is provided with a reset handle.

Preferably, the breaking arc-extinguishing device further comprises a manual closing switch arranged on the periphery of the mounting shell, and the manual closing switch can move the moving contact to connect or disconnect a circuit.

The invention has the beneficial effects that: in the prior art, only two contacts are separated to cut off power, and an electric arc still has certain conductivity in the air, so that after the contacts are tripped and separated for many times, the surfaces of the contacts can generate electric arc discharge to generate oxides, the contact resistance of the contacts is increased, the current carrying temperature is increased, the oxidation of the contacts can be further accelerated due to the temperature rise, and the low-voltage short-circuit device can be damaged even ignited and other accidents due to the vicious cycle.

Drawings

FIG. 1 is a schematic diagram of an arc-extinguishing circuit-breaking device according to the present invention;

fig. 2 is a schematic structural diagram of an arc-extinguishing circuit-breaking device according to the present invention when it is opened.

In the figure:

1. a first accommodating chamber;

2. a second accommodating chamber;

3. static contact;

4. a moving contact; 41. a tension spring; 42. a first clamping protrusion;

5. an insulating arc extinguishing member; 51. a pressure spring; 52. a second clamping protrusion; 53. a reset handle;

6. a trigger component; 601. a first limit end; 602. a second limit end; 61. a release; 62. a linkage member; 621. a butt joint plate; 622. a limiting plate; 6221. a guide projection; 6222. a return spring; 63. and a lock tongue.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-2, the present invention provides an arc-extinguishing circuit breaker, which includes a mounting housing, a static contact 3, a moving contact 4 and an insulating arc-extinguishing member 5; the mounting shell is provided with a first accommodating cavity 1 arranged along a first direction and a second accommodating cavity 2 arranged along a second direction and communicated to the first accommodating cavity 1; the static contact 3 is arranged in the first accommodating cavity 1; the moving contact 4 is movably arranged in the first accommodating cavity 1 along the extending direction of the first accommodating cavity 1, the moving contact 4 can be connected with the static contact 3 or separated from the static contact 3 to connect or disconnect a circuit, and the connection part of the moving contact 4 and the static contact 3 is opposite to the second accommodating cavity 2; insulating arc control spare 5 holds chamber 2 along the second extending direction removal and sets up in the second holds chamber 2, and when moving contact 4 and static contact 3 separated, insulating arc control spare 5 can remove to and discharge with isolated arc between moving contact 4 and the static contact 3, in this embodiment, first direction and second direction set up perpendicularly for the short distance removal of insulating arc control spare 5 just can separate moving contact 4 and static contact 3 completely, and isolated speed is fast.

In the prior art, the power is cut off only by separating two contacts, and the electric arc still has certain conductivity in the air, so that after the contacts are tripped and separated for many times, oxides can be generated on the surfaces of the contacts, the contact resistance of the contacts is increased, the current-carrying temperature is increased, the oxidation of the contacts can be further accelerated by the temperature rise, the damage of a low-voltage short-circuit device can be caused by the vicious damage, even accidents such as fire and the like occur, the arc-extinguishing circuit-breaking device provided by the embodiment can effectively cut off the arc action of air space through the insulating arc-extinguishing part 5, the moving contact 4 and the static contact 3 are protected from being oxidized, and good conductive characteristics are kept.

Specifically, still including triggering the subassembly 6, triggering the subassembly 6 and setting up in the installation casing, the moving contact 4 is kept away from the static contact 3 one end and is provided with extension spring 41, insulating arc extinguishing member 5 is kept away from moving contact 4 and static contact 3 junction one end and is provided with pressure spring 51, triggering the subassembly 6 and having first spacing end 601 and the spacing end 602 of second, first spacing end 601 butt makes the moving contact 4 connect in static contact 3 in moving contact 4, the spacing end 602 butt of second makes insulating arc extinguishing member 5 not stretch out from second holding chamber 2 in insulating arc extinguishing member 5, when voltage overloads, triggering the subassembly 6 can remove spacing to moving contact 4 and insulating arc extinguishing member 5, moving contact 4 separates with static contact 3 under the effect of extension spring 41, insulating arc extinguishing member 5 moves to between moving contact 4 and static contact 3 under the effect of pressure spring 51.

Furthermore, the triggering assembly 6 includes a release 61, a linkage 62 and a latch 63, wherein the release 61 can detect a real-time voltage, the release 61 is connected to the linkage 62, in this embodiment, the release 61 abuts against the linkage 62, in other embodiments, the release 61 and the linkage 62 can also be fixedly connected by a fixing member or bonded by an adhesive, the first limiting end 601 is located at the linkage 62, the second limiting end 602 is located at the latch 63, one end of the latch 63 far from the first limiting end 601 abuts against the linkage 62, when a voltage is overloaded, the release 61 can move in the second direction to drive the linkage 62 to be far away from the movable contact 4, and meanwhile, the latch 63 moves in the first direction relative to the linkage 62 to be far away from the insulating arc extinguishing member 5.

Specifically, linkage 62 includes butt plate 621 and limiting plate 622 that mutually perpendicular connects, release 61 is connected in butt plate 621, first spacing end 601 is located limiting plate 622, spring bolt 63 butts in limiting plate 622, further, limiting plate 622 is provided with guide protrusion 6221, spring bolt 63 butts in guide protrusion 6221, when linkage 62 moves along the first direction, spring bolt 63 slips off from guide protrusion 6221 and butts in linkage 62 surface in order to break away from spacing to insulating arc extinguishing member 5, in order to realize removing the spacing of first spacing end 601 to moving contact 4 simultaneously, spring bolt 63 moves along the second direction simultaneously and removes the restriction to insulating arc extinguishing member 5, guarantee that moving contact 4 separates the short-time insulating arc extinguishing member 5 after short circuit with static contact 3 and just moves to the arc discharge of separation air between static contact 3 and moving contact 4.

Specifically, a return spring 6222 is disposed at an end of the limiting plate 622 away from the first limiting end 601, when the circuit is broken, the release 61 drives the link 62 to compress the return spring 6222, when the circuit is closed, the release 61 is closed, and the return spring 6222 can automatically drive the link 62 and the release 61 to be reset together.

Specifically, the movable contact 4 is provided with a first clamping protrusion 42, the first limiting end 601 is clamped in the first clamping protrusion 42, the first clamping protrusion 42 is arranged on the adapter rod of the movable contact 4, the clamping is tight and solid, the first clamping protrusion 42 is provided with a first clamping surface and a first guide inclined surface, the first limiting end 601 is provided with a second clamping surface and a second guide inclined surface, the first clamping surface abuts against the second clamping surface during limiting, the first clamping surface and the second clamping surface are both planes, the linkage 62 can move along the second direction to be separated from the clamping, and the first guide inclined surface and the second guide inclined surface slide relatively to assist the return of the movable contact 4 when the movable contact 4 is returned to the original position.

Specifically, the insulating arc-extinguishing member 5 is provided with a second clamping protrusion 52, the second limiting end 602 is clamped in the second clamping protrusion 52, the second clamping protrusion 52 is provided with a third clamping surface and a third guiding inclined surface, and the second limiting end 602 is provided with a fourth clamping surface and a fourth guiding inclined surface, which have the same action principle.

Specifically, the insulating arc-extinguishing member 5 is provided with a reset knob 53, and the insulating arc-extinguishing member 5 is first returned by the reset knob 53 before the circuit is completed.

Specifically, the installation device further comprises a manual closing switch arranged on the periphery of the installation shell, and the manual closing switch can move the moving contact 4 to connect or disconnect the circuit.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.