CN217444305U

CN217444305U - Breaker outer casing

Info

Publication number: CN217444305U
Application number: CN202123297358.XU
Authority: CN
Inventors: 郭德鑫; 江华华; 王以盾; 胡广智
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-09-16
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a circuit breaker shell, its includes the housing and installs the lid on the housing, the lid is equipped with integrated into one piece's arc-extinguishing chamber, through with arc-extinguishing chamber and lid integrated into one piece, does not need to install the arc-extinguishing chamber alone, can avoid adopting DMC processing arc-extinguishing chamber, has convenient assembling, environmental protection and difficult cracked characteristics.

Description

Breaker outer casing

Technical Field

The utility model relates to a low voltage apparatus field especially relates to a circuit breaker housing.

Background

Circuit breakers are often used to control the make and break of lines and can break the line when the line fails. The shell of the existing circuit breaker needs to be respectively provided with a partition plate, a middle insertion piece and a rear insertion piece, so that the assembly efficiency is low, and if the shell is leaked, the inter-phase short circuit is caused, and even the problem that a mechanism inside the circuit breaker is blocked and fails is caused. In addition, the housing of the arc extinguishing mechanism needs to be separately installed, and the housing of the arc extinguishing mechanism is usually processed by DMC, so that the arc extinguishing mechanism has the defects of environmental pollution and easy fragmentation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a simple structure, convenient assembling's circuit breaker housing.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a circuit breaker housing includes a housing and a cover mounted on the housing, the cover being provided with an integrally formed arc chute.

Preferably, the housing is provided with an integrally formed middle insert.

Preferably, the cover casing is provided with a rear insertion piece which is integrally formed.

Preferably, the housing is provided with an integrally formed partition plate.

Preferably, still include with lid integrated into one piece's base structure, base structure and the spacing cooperation of arc extinguishing mechanism.

Preferably, a moving contact and an arc extinguishing mechanism are respectively arranged in the housing, the arc extinguishing cover is located between the arc extinguishing mechanism and the moving contact, an avoiding groove for avoiding the moving contact is formed in the arc extinguishing cover, and the moving contact can penetrate through the arc extinguishing cover from the avoiding groove when being disconnected.

Preferably, an inclined striking surface is arranged on the arc extinguishing cover and used for limiting the moving contact.

Preferably, two upper baffles are arranged in the cover, and the two middle inserting pieces are respectively arranged in parallel with the upper baffles and are respectively positioned on the outer sides of the two upper baffles.

Preferably, the cover is provided with an operation hole for avoiding the handle, the cover is correspondingly provided with arc-shaped first reinforcing ribs on two sides of the operation hole respectively, two ends of the two first reinforcing ribs are provided with a plurality of vertical second reinforcing ribs respectively, and the plurality of second reinforcing ribs are connected with the two first reinforcing ribs respectively.

Preferably, the arc extinguishing chamber includes two first arc isolating columns and sets up the second arc isolating column between two first arc isolating columns, forms the groove of stepping down that is used for dodging the moving contact between two first arc isolating columns, is equipped with the striking face that is used for spacing moving contact on the second arc isolating column.

Preferably, the arc extinguishing cover includes first flash barrier and the second flash barrier that the interval set up, be equipped with the groove of stepping down that is used for dodging the moving contact on the second flash barrier, first flash barrier sets up the one side of keeping away from arc extinguishing mechanism at the second flash barrier, be equipped with the third flash barrier that corresponds with the groove of stepping down on the second flash barrier on the first flash barrier, be equipped with the face of striking that is used for spacing moving contact on the third flash barrier.

Preferably, including at least two sets of circuit breaker looks utmost point, be equipped with the baffle between the adjacent circuit breaker looks utmost point respectively, every group circuit breaker looks utmost point is equipped with respectively the moving contact, at least two sets of circuit breaker looks utmost point moving contacts pass through the main shaft and connect, the baffle is equipped with the hole of dodging that is used for dodging the main shaft, well inserted sheet can insert dodge downtheholely, is equipped with the groove of dodging that is used for dodging the main shaft on well inserted sheet.

Preferably, be equipped with binding post in the housing, back inserted sheet can insert binding post's one side.

Preferably, two side walls of the cover opposite to each other are respectively provided with two partition boards, the outer walls of the two side walls of the housing opposite to each other are respectively provided with a groove corresponding to the partition boards, and the partition boards can be respectively inserted into the corresponding grooves.

The utility model discloses a circuit breaker shell through with arc-extinguish chamber 2 and 1 integrated into one piece of lid, does not need to install arc-extinguish chamber 2 alone, can avoid adopting DMC processing arc-extinguish chamber 2, has convenient assembling, environmental protection and difficult cracked characteristics.

In addition, after the moving contact 72 passes through the arc-extinguishing chamber 2 from the avoidance groove 41, the arc can be attracted to the side surface of the arc-extinguishing chamber 2, and the arc-extinguishing chamber 2 formed integrally can also reliably isolate the arc, high-temperature gas and metal particles.

Drawings

Fig. 1 is a schematic structural diagram of a cover in a first embodiment of the present invention;

figure 2 is another side perspective view of figure 2 of the present invention;

fig. 3 is an enlarged view of a portion of fig. 2 according to the present invention;

fig. 4 is a schematic structural diagram of the inside of the casing according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of a circuit breaker according to a first embodiment of the present invention;

figure 6 is a schematic view of the cover of figure 4 according to the present invention;

fig. 7 is a schematic structural diagram of an arc extinguishing mechanism according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of a cover in the second embodiment of the present invention;

figure 9 is another side view of the present invention from figure 7.

Detailed Description

The following describes the embodiments of the circuit breaker housing according to the present invention with reference to the embodiments shown in fig. 1 to 9. The circuit breaker case of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-4, the circuit breaker housing of the present invention comprises a housing 7 and a cover 1 mounted on the housing 7, wherein the cover 1 is provided with an integrally formed arc extinguishing chamber 2.

The utility model discloses a circuit breaker shell with arc-extinguish chamber 2 and 1 integrated into one piece of lid, does not need to install arc-extinguish chamber 2 alone, can avoid adopting DMC processing arc-extinguish chamber 2, has convenient assembling, environmental protection and difficult cracked characteristics.

As shown in fig. 1-2, the cover further includes a base structure 3 integrally formed with the cover 1, the base structure 3 is in limit fit with the arc extinguishing mechanism 8, and the arc extinguishing mechanism 8 is limited in the housing 7 through the base structure 3.

Further, a moving contact 72 and an arc extinguishing mechanism 8 are respectively arranged in the housing 7, the arc extinguishing chamber 2 is located between the arc extinguishing mechanism 8 and the moving contact 72, an avoiding groove 41 for avoiding the moving contact 72 is formed in the arc extinguishing chamber 2, the moving contact 72 can penetrate through the arc extinguishing chamber 2 from the avoiding groove 41 when the arc extinguishing chamber is disconnected, the moving contact 72 can attract electric arcs to the side face of the arc extinguishing chamber 2 after penetrating through the arc extinguishing chamber 2 from the avoiding groove 41, and the arc extinguishing chamber 2 formed integrally can be guaranteed to be capable of reliably isolating electric arcs, high-temperature gases and metal particles.

The plastic shell type circuit breaker comprises three groups of breaker phase poles which are arranged side by side, wherein the three groups of breaker phase poles respectively correspond to an A phase, a B phase and a C phase, the three groups of breaker phase poles respectively comprise two groups of wiring terminals 73 arranged at two ends of each circuit breaker phase pole, and a fixed contact 71, a movable contact 72, an arc extinguishing mechanism 8 and a release 74 which are arranged between the two groups of wiring terminals 73, an operating mechanism 80 is arranged above the middle breaker phase pole, the operating mechanism 80 is respectively matched with a main shaft 75 and a traction rod 76, the main shaft 75 is respectively matched with the movable contacts 72 of the three groups of breaker phase poles, and when the operating mechanism 80 is buckled, the movable contacts 72 of the three groups of breaker phase poles can be respectively driven by the main shaft 75 to be contacted with and separated from the corresponding fixed contacts 71, so that on-off control of a circuit is realized;

the draw bar 76 is respectively matched with the trippers 74 of the three sets of circuit breaker phase poles, and when a phase pole where any tripper 74 can be located fails, the draw bar 76 can trigger the operating mechanism 80 to trip, so that the operating mechanism 80 drives the three sets of moving contacts 72 which respectively drive the three sets of circuit breaker phase poles to be separated from the corresponding static contacts 71, and further the three sets of circuit breaker phase poles are disconnected, and the protection of a circuit is realized.

Be equipped with two baffles in the casing, two baffles divide the casing inner space into three looks utmost point space, and three looks utmost point space is used for holding respectively three group circuit breaker looks utmost point, and three group circuit breaker looks utmost point are A looks, B looks and C looks respectively, and B looks is well utmost point, and A looks and C looks are extremely for the side, the baffle is including corresponding overhead gage 10 and lower baffle 70 that sets up, overhead gage 10 and lower baffle 70 respectively with lid 1 and housing 7 integrated into one piece, lower baffle 70 and overhead gage 10 constitute the baffle when lid 1 is installed on housing 7, the position that lid 1 corresponds in well utmost point is equipped with the handle hole that is used for dodging operating device 80 upper handle 77, and handle 77 stretches the casing outside from the handle hole and supplies the operation, the thickness of baffle 70 is greater than overhead gage 10 down, dodge hole 78 and set up on baffle 70 down and be located one side of overhead gage 10, the two middle insertion pieces 4 are respectively arranged in parallel with the upper baffle plates 10 and are respectively positioned at the outer sides of the two upper baffle plates 10.

As shown in fig. 2-3, the cover 1 is provided with arc-shaped first reinforcing ribs corresponding to the two sides of the operation hole, a plurality of vertical second reinforcing ribs are provided at the two ends of the two first reinforcing ribs, and the plurality of second reinforcing ribs are connected with the two first reinforcing ribs.

As shown in fig. 2 to 6, the baffle is provided with an avoiding hole 78 for avoiding the main shaft 75, the cover 1 is provided with an integrally formed middle insert piece 4, the middle insert piece 4 can be inserted into the avoiding hole 78, an avoiding groove 41 for avoiding the main shaft 75 is provided on the middle insert piece 4, and the middle insert piece 4 can be inserted into the avoiding hole 78 to play a role of phase-to-phase insulation.

Specifically, on two lower baffles 70 of housing 7 between three sets of circuit breaker looks poles, be equipped with respectively and be used for dodging main shaft 75 dodging hole 78, main shaft 75 passes and crosses three sets of circuit breaker looks poles from dodging hole 78, two side looks poles of lid 1 are equipped with integrated into one piece's well inserted sheet 4 respectively in being close to one side of well utmost point, and inserted sheet 4 can insert in two one side of baffle 70 is equipped with the groove 41 of dodging that is used for dodging main shaft 75 on well inserted sheet 4. Preferably, the middle insert 4 in the two side phase electrodes is disposed at a distance from the two upper baffles 10, and is connected between the upper baffles 10 and the middle insert 4 by the reinforcing rib 42. Preferably, well inserted sheet 4 links to each other with the arc-extinguishing chamber 2 that corresponds the circuit breaker looks utmost point, not only can improve intensity between them, can improve the leakproofness of arc-extinguishing chamber 2 moreover.

Further, two opposite side walls of the cover 1 are respectively provided with an integrally formed partition plate 5, the outer walls of the two opposite side walls of the housing 7 are respectively provided with a groove 79 corresponding to the partition plate 5, the partition plates 5 can be respectively inserted into the corresponding grooves 79, and the partition plates 5 can be used for not only electric arcs generated when the insulating products are cut off, but also creepage distances between the inside and the outside of the housing can be increased.

Further, the cover 1 is provided with integrally formed rear insertion pieces 6 respectively corresponding to three groups of circuit breaker phase poles, and the rear insertion pieces 6 can be inserted into one side of the wiring terminal 73 in the housing 7 to separate the wiring terminal 73 from the corresponding phase pole space.

Example one

As shown in fig. 1-2, the base structure 3 of this embodiment is provided with two pairs of long limiting pieces 31 and a pair of short limiting pieces 32, the arc chute 2 of this embodiment includes two first arc-isolating columns 21 arranged at intervals, and an abdicating groove 20 for avoiding the moving contact 72 is formed between the two first arc-isolating columns 21, so as to reduce the internal damage of the circuit breaker.

Further, the arc extinguishing chamber 2 further includes a second arc isolating column 22 disposed between the two first arc isolating columns 21, the height of the second arc isolating column 22 is smaller than that of the first arc isolating columns 21, and an inclined striking surface 28 for blocking the movable contact 72 is disposed on the second arc isolating column 22.

As shown in fig. 7, the arc-extinguishing mechanism 8 of the present embodiment includes two side plates 81 disposed opposite to each other, and a plurality of arc-extinguishing grid plates 82 disposed between the two side plates 81, notch structures 83 and protrusion structures 84 respectively disposed on top sides of the two side plates 81, the long position-limiting plate 31 and the short position-limiting plate 32 of the base structure 3 respectively engaged with the notch structures 83 and the protrusion structures 84 on top sides of the two side plates 81,

the base structure 3 is respectively pressed on the top sides of the notch structure 83 and the protrusion structure 84 through the long limiting sheet 31 and the short limiting sheet 32, so that the two side plates 81 are respectively pressed on the housing 7, the whole arc extinguishing mechanism 8 is fixed in the housing 7, and structures for limiting the side plates, such as grooves, convex ribs and the like, can be arranged in the housing 7, and are not specifically limited here.

Example two

As shown in fig. 8-9, the arc extinguishing chamber 2 includes a first arc isolating plate 24 and a second arc isolating plate 25 which are arranged at an interval, the second arc isolating plate 25 is provided with a yielding groove 20 for yielding the movable contact 72, the first arc isolating plate 24 is arranged on one side of the second arc isolating plate 25 far away from the arc extinguishing mechanism 8, the first arc isolating plate 24 is provided with a third arc isolating column 23 corresponding to the yielding groove 20 on the second arc isolating plate 25, and the third arc isolating column 23 is provided with a striking surface 28 for limiting the movable contact 72. The base structure 3 of the present embodiment may be adjusted according to the shape of the arc extinguishing mechanism 8, and the arc extinguishing mechanism 8 may be pressed into the housing 7.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A circuit breaker housing, characterized by: the arc extinguishing cover comprises a cover shell (7) and a cover (1) arranged on the cover shell (7), wherein the cover (1) is provided with an arc extinguishing cover (2) which is integrally formed.

2. The circuit breaker housing of claim 1, wherein: and the housing (7) is provided with an integrally formed middle insert piece (4).

3. The circuit breaker housing of claim 1, wherein: and the housing (7) is provided with a rear inserting piece (6) which is integrally formed.

4. The circuit breaker housing of claim 1, wherein: the housing (7) is provided with an integrally formed partition plate (5).

5. The circuit breaker housing of claim 1, wherein: the arc extinguishing device is characterized by further comprising a base structure (3) integrally formed with the cover (1), wherein the base structure (3) is in limit fit with the arc extinguishing mechanism (8).

6. The circuit breaker housing of claim 1, wherein: be equipped with moving contact (72) and arc extinguishing mechanism (8) in housing (7) respectively, arc extinguishing chamber (2) are located between arc extinguishing mechanism (8) and moving contact (72), are equipped with dodge groove (41) that are used for dodging moving contact (72) on arc extinguishing chamber (2), moving contact (72) can pass arc extinguishing chamber (2) from dodging groove (41) when breaking.

7. The circuit breaker housing of claim 1, wherein: the arc extinguishing cover (2) is provided with an inclined striking surface (28), and the striking surface (28) is used for limiting the moving contact (72).

8. The circuit breaker housing of claim 2, wherein: two upper baffles (10) are arranged in the cover (1), and the two middle insertion pieces (4) are respectively arranged in parallel with the upper baffles (10) and are respectively positioned on the outer sides of the two upper baffles (10).

9. The circuit breaker housing of claim 1, wherein: the cover (1) is provided with an operation hole for avoiding the handle (77), the cover (1) is correspondingly provided with arc-shaped first reinforcing ribs on two sides of the operation hole respectively, a plurality of vertical second reinforcing ribs are arranged at two ends of the two first reinforcing ribs respectively, and the plurality of second reinforcing ribs are connected with the two first reinforcing ribs respectively.

10. The circuit breaker housing of claim 1, wherein: the arc extinguishing chamber (2) comprises two first arc isolating columns (21) and a second arc isolating column (22) arranged between the two first arc isolating columns (21), a yielding groove (20) used for yielding the moving contact (72) is formed between the two first arc isolating columns (21), and a striking face (28) used for limiting the moving contact (72) is arranged on the second arc isolating column (22).

11. The circuit breaker housing of claim 1, wherein: arc-extinguishing chamber (2) are including first flash barrier (24) and second flash barrier (25) that the interval set up, be equipped with groove (20) of stepping down that are used for dodging moving contact (72) on second flash barrier (25), one side of arc extinguishing mechanism (8) is kept away from in second flash barrier (25) in first flash barrier (24) setting, be equipped with on first flash barrier (24) and step down third flash column (23) that groove (20) correspond on second flash barrier (25), be equipped with on third flash column (23) and be used for striking face (28) of spacing moving contact (72).

12. The circuit breaker housing of claim 2, wherein: including at least two sets of circuit breaker looks utmost point, be equipped with the baffle between the adjacent circuit breaker looks utmost point respectively, every group circuit breaker looks utmost point is equipped with moving contact (72) respectively, and at least two sets of circuit breaker looks utmost point moving contacts (72) are connected through main shaft (75), the baffle is equipped with dodges hole (78) that are used for dodging main shaft (75), well inserted sheet (4) can be inserted dodge in hole (78), be equipped with dodging groove (41) that are used for dodging main shaft (75) on well inserted sheet (4).

13. The circuit breaker housing of claim 3, wherein: be equipped with binding post (73) in housing (7), one side that binding post (73) can be inserted in back inserted sheet (6).

14. The circuit breaker housing of claim 4, wherein: two opposite side walls of the cover (1) are respectively provided with two partition plates (5), the outer walls of the two opposite side walls of the housing (7) are respectively provided with a groove (79) corresponding to the partition plates (5), and the partition plates (5) can be respectively inserted into the corresponding grooves (79).