CN219370956U - Arc extinguishing chamber and circuit breaker - Google Patents
Arc extinguishing chamber and circuit breaker Download PDFInfo
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- CN219370956U CN219370956U CN202320046996.4U CN202320046996U CN219370956U CN 219370956 U CN219370956 U CN 219370956U CN 202320046996 U CN202320046996 U CN 202320046996U CN 219370956 U CN219370956 U CN 219370956U
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Abstract
The utility model relates to the technical field of low-voltage circuit breakers, in particular to an arc extinguishing chamber and a circuit breaker. The arc extinguishing chamber is provided with a side plate with a first end and a second end which are opposite, three groups of grid sheet groups are sequentially arranged along the direction from the first end to the second end, the circuit breaker comprises a moving contact and a fixed contact, and all the grid sheet groups are positioned between a moving arc striking plate at the moving contact and a fixed arc striking plate of the fixed contact. An included angle A is formed between any arc extinguishing gate sheet and the horizontal plane, and the angle A is more than or equal to 0 degree and less than or equal to 90 degrees. A first arc striking plate for striking an arc is arranged between two adjacent grid sheet groups. Through setting up three bars group of arranging in the direction of first end to second end, compare in the arc extinguishing bars piece overall arrangement in current explosion chamber, changed the arrangement of arc extinguishing bars piece, can arrange more arc extinguishing bars piece, further elongate electric arc, improve the ability of quenching arcs, simple structure, rationally distributed.
Description
Technical Field
The utility model relates to the technical field of low-voltage circuit breakers, in particular to an arc extinguishing chamber and a circuit breaker.
Background
A circuit breaker refers to a switching device capable of closing, carrying and breaking a current under a normal circuit while closing, carrying and breaking a current under an abnormal circuit condition within a prescribed time.
Under normal conditions, the circuit breaker comprises a moving contact, a fixed contact, an arc extinguishing chamber and other structures, wherein the moving contact and the fixed contact are connected with a circuit, when the moving contact and the fixed contact are disconnected, an arc can be generated, and the generated arc is required to be cut by utilizing an arc extinguishing grid sheet arranged in the arc extinguishing chamber so as to extinguish the arc.
In the prior art, the arc-extinguishing gate sheets in the arc-extinguishing chamber are generally arranged in parallel with the moving contact along the opening direction of the moving contact and are vertically arranged in the arc-extinguishing chamber. Therefore, due to the limitation of the space of the circuit breaker, too many arc-extinguishing bars cannot be arranged in the arc-extinguishing chamber, so that the arc-extinguishing path is short, the arc-extinguishing capability in the arc-extinguishing chamber is limited, and the arc generated when the moving contact and the fixed contact are disconnected cannot be completely extinguished after entering the arc-extinguishing chamber.
Disclosure of Invention
The utility model solves the problems that: the number of the arc-extinguishing grid plates in the arc-extinguishing chamber of the existing circuit breaker is small, so that the arc-extinguishing capability in the arc-extinguishing chamber is limited.
(II) technical scheme
In order to solve the technical problems, an embodiment of the utility model provides an arc extinguishing chamber, which is used for a circuit breaker, wherein the circuit breaker comprises a contact system, the contact system comprises a moving contact and a fixed contact, a moving arc striking plate is arranged at the moving contact, and a fixed arc striking plate is arranged at the fixed contact; the arc extinguishing chamber is provided with a side plate, the side plate is provided with a first end and a second end which are oppositely arranged, three groups of grid sheet groups are sequentially arranged on the side plate along the direction from the first end to the second end, each group of grid sheet groups comprises a plurality of arc extinguishing grid sheets, and all the grid sheet groups are positioned between the movable arc striking plate and the static arc striking plate;
a first arc striking plate is arranged between two adjacent grid plate groups, the first arc striking plate comprises a first plate body and a second plate body, and one end of the first plate body, which is close to the contact system, is connected with one end of the second plate body, which is close to the contact system; the first plate body directs an arc to the set of grid plates adjacent to the first plate body; the second plate body directs an arc to the grid set adjacent to the second plate body;
an included angle A is formed between any one arc extinguishing grid sheet and the horizontal plane, wherein the included angle A is more than or equal to 0 degree and less than or equal to 90 degrees.
Further, along the direction from the second end to the first end, the three grid sheet sets are a first grid sheet set, a second grid sheet set and a third grid sheet set respectively;
the first grid plate group comprises a plurality of first arc-extinguishing grid plates, all the first arc-extinguishing grid plates are arranged at intervals in the transverse direction, and any one of the first arc-extinguishing grid plates is parallel to the static arc striking plate;
the second grid plate group comprises a plurality of second arc-extinguishing grid plates, and all the second arc-extinguishing grid plates are arranged at intervals along the vertical direction;
the third grid plate group comprises a plurality of third arc-extinguishing grid plates, and all the third arc-extinguishing grid plates are distributed in an arc shape.
Further, the second arc-extinguishing gate sheet is arranged horizontally or is arranged obliquely.
Further, the first striking plate positioned between the first grid sheet set and the second grid sheet set further comprises a first extension part;
the first extension part extends along the direction of the second plate body towards the end close to the contact system, one end of the first extension part is connected with the end, close to the contact system, of the first plate body, and the other end of the first extension part is connected with the end, close to the contact system, of the second plate body.
Further, along the direction from the second end to the first end, the three grid sheet sets are a first grid sheet set, a second grid sheet set and a third grid sheet set respectively;
the first grid plate group comprises a plurality of first arc-extinguishing grid plates, and all the first arc-extinguishing grid plates are arranged in an arc shape;
the second grid plate group comprises a plurality of second arc-extinguishing grid plates, and all the second arc-extinguishing grid plates are arranged at intervals along the vertical direction;
the third grid plate group comprises a plurality of third arc-extinguishing grid plates, and all the third arc-extinguishing grid plates are distributed in an arc shape.
Further, the second arc-extinguishing gate sheet is arranged horizontally or is arranged obliquely.
Further, the length of the first plate body is the same as the length of the second plate body.
Further, any two second arc extinguishing grid plates are arranged in parallel.
Further, a sinking structure which is sunken towards the direction away from the side plate is arranged on one side of the static contact close to the side plate;
and a magnetism increasing piece is arranged in the sinking structure.
The embodiment of the utility model further provides a circuit breaker, which comprises the arc extinguishing chamber in any embodiment.
The utility model has the beneficial effects that:
the utility model provides an arc extinguish chamber, which is used for a circuit breaker, wherein the circuit breaker comprises a contact system, the contact system comprises a moving contact and a fixed contact, a side plate is arranged in the arc extinguish chamber, the side plate is provided with a first end and a second end which are oppositely arranged, three groups of grid sheet groups are sequentially arranged along the direction from the first end to the second end, and each group of grid sheet group comprises a plurality of arc extinguish grid sheets; a movable arc striking plate is arranged at the movable contact, and a static arc striking plate is arranged at the static contact; all the grid sheet groups are positioned between the movable arc striking plate and the static arc striking plate. An included angle A is formed between any arc extinguishing gate sheet and the horizontal plane, wherein the included angle A is more than or equal to 0 degree and less than or equal to 90 degrees. A first arc striking plate is arranged between two adjacent grid sheet groups, the first arc striking plate comprises a first plate body and a second plate body, and one end of the first plate body, which is close to the contact system, is connected with one end of the second plate body, which is close to the contact system; the first plate body guides the electric arc to a grid sheet group adjacent to the first plate body; the second plate directs the arc to a set of grid plates adjacent the second plate.
According to the arc extinguishing chamber, the three groups of the grid plate groups extending along the direction from the first end to the second end are arranged, compared with the existing arc extinguishing chamber, the arc extinguishing chamber has the advantages that more arc extinguishing grid plates can be arranged by changing the arrangement mode of the arc extinguishing grid plates, the arc is further lengthened, the arc extinguishing capability is improved, the structure is simple, and the layout is reasonable; meanwhile, a movable arc striking plate, a static arc striking plate and a first arc striking plate are arranged, electric arcs are introduced into corresponding grid plate groups, and the problem that the electric arcs are difficult to introduce into an arc extinguishing chamber is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first circuit breaker according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a second circuit breaker according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a third circuit breaker according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a fourth circuit breaker according to an embodiment of the present utility model.
Icon: 1-a first grid set; 11-a first arc chute sheet;
2-a second set of gate sheets; 21-a second arc extinguishing grid piece;
3-a third grid set; 31-a third arc extinguishing grid piece;
4-fourth grid set; 41-fourth arc extinguishing grid plates;
5-a fifth grid set; 51-fifth arc extinguishing grid plates;
61-a first striking plate; 611-a first plate; 612-a second plate; 613-a first extension; 62-static arc striking plate; 621-a third plate body; 622-fourth plate body; 623-transition segment; 624-a second extension; 63-moving an arc striking plate;
7-contact systems; 71-a moving contact; 711-first contacts; 72-a fixed contact; 721-second contacts;
8-side plates; 81-a first end; 82-a second end;
9-magnetism increasing piece.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 4, one embodiment of the present utility model provides a circuit breaker comprising a contact system 7 and an arc chute, the contact system 7 being capable of generating an arc.
Optionally, the contact system 7 includes a moving contact 71 and a fixed contact 72, a first contact 711 is disposed on the moving contact 71, a second contact 721 is disposed on the fixed contact 72, and the first contact 711 and the second contact 721 both extend into the arc extinguishing chamber. The circuit breaker further comprises an operating mechanism, the operating mechanism is connected with the moving contact 71, and the moving contact 71 can rotate under the action of the operating mechanism, so that the first contact 711 can swing in the arc extinguishing chamber. An arc is generated between the first contact 711 and the second contact 721.
The circuit breaker provided by the embodiment has an upper end and a lower end which are oppositely arranged. The upper end is an operation end, and the lower end is used for being connected with a power supply and a load. The vertical direction is vertical, and the direction perpendicular to the vertical direction on the paper surface, namely the left-right direction is horizontal.
In the present embodiment, the stationary contact 72 extends in the vertical direction.
The arc chute is provided with a side plate 8, the side plate 8 having oppositely disposed first and second ends 81, 82. The first end 81 of the side plate 8 is the end near the upper end, the second end 82 is the end near the lower end, and the side plate 8 is an i-shaped plate (extending vertically). Three groups of grating sheet groups are sequentially arranged along the direction from the first end 81 to the second end 82, and each group of grating sheet group comprises a plurality of arc extinguishing grating sheets. An included angle A is formed between any one arc-extinguishing grid sheet and the horizontal plane, wherein the included angle A is more than or equal to 0 degree and less than or equal to 90 degrees, so that openings between two adjacent arc-extinguishing grid sheets in the same group are all directed to the contact system 7.
In the present embodiment, the gate group provided on the side plate 8 extends in the direction from the first end 81 to the second end 82, that is, in the vertical direction.
In this embodiment, it is preferred that the openings between two adjacent arc-extinguishing bars within the same group are each directed towards the contact system 7, so that the arc can blow all into the arc-extinguishing bars under the effect of magnetic blow-off forces to extinguish the arc.
Optionally, by adjusting the angle between the arc-extinguishing bars and the horizontal plane, the openings between any two adjacent arc-extinguishing bars are directed towards the contact system 7. Alternatively, the arc extinguishing bars may be inclined or arc-shaped, as will be described in detail below.
Optionally, in this embodiment, when the arc extinguishing gate is disposed horizontally, an included angle between the arc extinguishing gate and the horizontal plane is 0 °; when the arc extinguishing grid plates are vertically arranged, the included angle between the arc extinguishing grid plates and the horizontal plane is 90 degrees; when the arc-extinguishing grid plates are obliquely arranged, the included angle between the arc-extinguishing grid plates and the horizontal plane is an acute angle, namely 0 degree < A < 90 degrees.
Alternatively, the arc-extinguishing bars in the same group may have a plurality of different angle values with respect to the horizontal plane.
In this embodiment, the horizontal plane is only used as a reference surface, and when the side plate 8 is placed vertically, the horizontal plane is used as a reference; if the side plates 8 are placed horizontally, reference can also be made to a vertical plane.
In this embodiment, through setting up three bars piece group of arranging along the direction of first end 81 to second end 82 at the explosion chamber, compare in the arc extinguishing bars piece overall arrangement of current explosion chamber, through the mode of arranging that changes the arc extinguishing bars piece, can arrange more arc extinguishing bars piece, further elongate electric arc, improve the ability of putting out the arc, simple structure, it is rationally distributed, solved the problem that the electric arc is difficult to introduce the explosion chamber.
Alternatively, as shown in fig. 1 to 4, a first striking plate 61 is provided between two adjacent gate sheet groups. The first striking plate 61 is used for connecting two adjacent arc extinguishing grid sheet groups.
In this embodiment, by providing the first striking plate 61, the arc is introduced into the corresponding grid plate group, so as to improve the arc extinguishing capability, and solve the problem that the arc is difficult to be introduced into the arc extinguishing chamber.
Alternatively, the first striking plate 61 may have various structures due to different arrangement angles of the arc extinguishing bars in each of the bar groups, which will be described in detail below in connection with the layout of the bar groups.
As shown in fig. 1 to 4, the first striking plate 61 includes a first plate body 611 and a second plate body 612, and an end of the first plate body 611 near the contact system 7 is connected to an end of the second plate body 612 near the contact system 7. The first plate 611 directs the arc to the set of grid plates adjacent to the first plate 611. The second plate 612 directs the arc to the set of grid plates adjacent to the second plate 612.
In this embodiment, the end of the first plate 611 near the contact system 7 is connected to the end of the second plate 612 near the contact system 7, so as to seal the gap between two adjacent grid sets, prevent the arc from escaping to burn the casing and other structures of the circuit breaker, and simultaneously accelerate the transfer of the arc, so that the arc extinguishing grid of the grid set adjacent to the first striking plate 61 breaks down rapidly.
And, the first plate body 611 is used to introduce an arc into the grid sheet group adjacent to the first plate body 611 to extinguish the arc. The second plate 612 is used to introduce an arc into the set of grid plates adjacent to the second plate 612 to extinguish the arc.
Alternatively, the first plate body 611 extends toward the gate sheet group adjacent to the first plate body 611, and the second plate body 612 extends toward the gate sheet group adjacent to the second plate body 612.
As shown in fig. 1 to 4, a moving arc striking plate 63 is provided at the moving contact 71, and a stationary arc striking plate 62 is provided at the stationary contact 72. All the gate sheet sets are located between the movable striking plate 63 and the stationary striking plate 62.
In the present embodiment, the movable arc striking plate 63 is located at a position where the first contact 711 is farthest from the second contact 721 when the second contact 721 is disconnected from the first contact 711.
In this embodiment, all the grid sheet sets are disposed between the movable arc striking plate 63 and the static arc striking plate 62, and the electric arc generated when the movable contact 71 and the static contact 72 are disconnected can all enter the arc extinguishing grid sheets under the action of magnetic blowing force, so as to prevent the electric arc from escaping and improve the arc extinguishing effect.
In the present embodiment, for convenience of description, three sets of the grating sheet sets are the first grating sheet set 1, the second grating sheet set 2, and the third grating sheet set 3, respectively, in the direction from the second end 82 to the first end 81.
In the present embodiment, the first gate group 1, the second gate group 2, and the third gate group 3 have a plurality of arrangements.
In this embodiment, the oblique direction is a direction having a certain included angle with both the transverse direction and the vertical direction.
Example 1
As shown in fig. 1, the first grid set 1 includes a plurality of first arc extinguishing grid plates 11, and all the first arc extinguishing grid plates 11 are arranged at intervals in the lateral direction. In the present embodiment, the first arc-extinguishing bars 11 in all the first bar groups 1 are arranged in sequence from left to right, and optionally, the first arc-extinguishing bars 11 are arranged obliquely so that the opening between two adjacent arc-extinguishing bars can point to the arc. At the same time, any one of the first arc extinguishing gate sheets 11 is parallel to the static striking plate 62.
The second grid set 2 includes a plurality of second arc-extinguishing grid plates 21, and all the second arc-extinguishing grid plates 21 are arranged at vertical intervals. The arc-extinguishing bars of the second bar group 2 are sequentially arranged from top to bottom, and optionally, the second arc-extinguishing bars 21 can be arranged parallel to the horizontal plane or obliquely arranged, so that the opening between two adjacent second arc-extinguishing bars 21 can be ensured to point to an electric arc.
The third grid set 3 includes a plurality of third arc-extinguishing grid plates 31, and all the third arc-extinguishing grid plates 31 are arranged in an arc shape.
In this embodiment, through changing the arrangement mode of arc extinguishing bars in the explosion chamber, set up more arc extinguishing bars in the explosion chamber for the electric arc is elongated, has improved the arc extinguishing ability, has solved the problem that the electric arc is difficult to introduce the explosion chamber.
In the present embodiment, the movable contact 71 extends into the second grid set 2 and is outside the first grid set 1 and the third grid set 3.
In the present embodiment, the first striking plate 61 located between the first grid sheet set 1 and the second grid sheet set 2 is in the shape of "7"; the first plate body 611 extends toward the second grid set 2 and introduces an arc into the second grid set 2; the second plate 612 extends in the direction of the first grid set 1 and introduces an arc into the first grid set 1.
Optionally, in order to improve the arcing effect, the first arcing plate 61 between the first grid set 1 and the second grid set 2 further has a first extension portion 613, where the first extension portion 613 extends along the second plate 612 towards a direction close to one end of the contact system 7, and two ends of the first extension portion 613 are respectively connected to one end of the first plate 611 close to the contact system 7 and one end of the second plate 612 close to the contact system 7.
By providing the first extension portion 613, the arc generated when the moving contact 71 and the fixed contact 72 are disconnected can be quickly introduced into the first grid sheet group 1, and the arc striking effect is improved.
In the present embodiment, the first striking plate 61 located between the second gate group 2 and the third gate group 3 is in a "V" shape.
Optionally, the length of the first plate 611 is the same as the length of the second plate 612.
According to the circuit breaker provided by the embodiment of the utility model, two grid plate groups can be arranged in the arc extinguishing chamber.
Example two
As shown in fig. 2, in the present embodiment, the first grid set 1 includes a plurality of first arc extinguishing grid plates 11, and the angle value of the included angle a between each first arc extinguishing grid plate 11 and the horizontal plane is different. Preferably, all the first arc-extinguishing bars 11 are arranged in an arc shape.
The second grid set 2 includes a plurality of second arc extinguishing grid plates 21, and all the second arc extinguishing grid plates 21 are arranged at vertical intervals, that is, sequentially from top to bottom. Alternatively, the second arc extinguishing gate sheet 21 may be disposed parallel to the horizontal plane or may be disposed obliquely.
The third grating group 3 comprises a plurality of third arc-extinguishing grating plates 31, and the angle value of the included angle A between each third arc-extinguishing grating plate 31 and the horizontal plane is different. Preferably, all third arc extinguishing bars 31 are arranged in an arc shape.
In the present embodiment, the first grid set 1 and the second grid set 2 are arc-shaped, and the first grid set 1, the second grid set 2 and the third grid set 3 are sequentially arranged, so that all the arc-extinguishing grid pieces (the first arc-extinguishing grid piece 11, the second arc-extinguishing grid piece 21 and the third arc-extinguishing grid piece 31) on the side plate 8 are arc-shapedAnd (5) arranging in a shape. The space in the explosion chamber is fully utilized, the arc is further elongated, so that the explosion chamber has high arc extinguishing capability, and meanwhile, the structure is simple and the layout is reasonable.
Alternatively, in the present embodiment, any two second arc extinguishing gate sheets 21 are disposed in parallel.
In the present embodiment, the movable contact 71 is outside the first gate group 1, the second gate group 2, and the third gate group 3.
In the present embodiment, the first striking plate 61 located between the second grid set 2 and the third grid set 3, and the first striking plate 61 located between the first grid set 1 and the second grid set 2 are each in a "V" shape.
Optionally, the length of the first plate 611 is the same as the length of the second plate 612.
In the present embodiment, the first plate body 611 located between the second grid set 2 and the third grid set 3 extends in the direction of the third grid set 3, and introduces an arc into the third grid set 3; the second plate 612 located between the second and third groups 2 and 3 extends in the direction of the second group 2 and introduces an arc into the second group 2.
In the present embodiment, the first plate body 611 located between the first grid set 1 and the second grid set 2 extends in the direction of the second grid set 2, and introduces an arc into the second grid set 2; the second plate 612 located between the second grid set 2 and the first grid set 1 extends in the direction of the first grid set 1 and introduces an arc into the first grid set 1.
In this embodiment, through changing the arrangement mode of the arc extinguishing bars in the arc extinguishing chamber, more arc extinguishing bars are arranged in the arc extinguishing chamber, so that the arc is lengthened, the arc extinguishing capability is improved, and the problem that the arc is difficult to introduce into the arc extinguishing chamber is solved.
Alternatively, two sets of gate sheet sets may be disposed in the arc extinguishing chamber according to the embodiment of the present utility model, as shown in fig. 3 and fig. 4, where the arc extinguishing chamber is provided with two sets of gate sheet sets, and the two sets of gate sheet sets are respectively the fourth gate sheet set 4 and the fifth gate sheet set 5 along the direction from the first end 81 to the second end 82.
In this embodiment, through changing the arrangement mode of arc extinguishing bars in the arc extinguishing chamber, set up two group bars group in the arc extinguishing chamber for the electric arc is elongated, has improved the arc extinguishing ability, has solved the electric arc and has been difficult to introduce the problem of explosion chamber.
Example III
As shown in fig. 3, in the present embodiment, the fourth grid set 4 includes a plurality of fourth arc extinguishing grid plates 41, and all the fourth arc extinguishing grid plates 41 are disposed vertically. The fifth grid set 5 includes a plurality of fifth arc-extinguishing grid plates 51, and all the fifth arc-extinguishing grid plates 51 are arranged along the transverse direction. By arranging the fourth arc-extinguishing grid plates 41 vertically arranged and the fifth arc-extinguishing grid plates 51 transversely arranged, the original arrangement mode of the arc-extinguishing grid plates is changed, so that the arc is lengthened, and the arc-extinguishing capability is improved.
Alternatively, in this embodiment, the fourth arc extinguishing gate 41 may be disposed obliquely or horizontally, and in this embodiment, an oblique arrangement is adopted.
The fifth arc extinguishing gate sheet 51 may be disposed obliquely or vertically, and in this embodiment, a vertical arrangement is adopted.
As shown in fig. 3, in the present embodiment, the first striking plate 61 further includes a first extension 613. The first extension 613 extends along the second plate 612 in a direction towards one end of the contact system 7; the first extension 613 is connected at one end to an end of the first plate 611 adjacent to the contact system 7, and is connected at the other end to an end of the second plate 612 adjacent to the contact system 7.
In this embodiment, by providing the first extension portion 613, an arc generated when the moving contact 71 and the fixed contact 72 are disconnected can be more quickly introduced into the fifth grid set 5, and an arc striking effect is improved.
As shown in fig. 3, in the present embodiment, the stationary contact 72 includes a third plate 621, a fourth plate 622, a second extension 624, and a transition section 623. The third plate 621 is connected to the fixed contact 72, specifically, the third plate 621 is connected to a lower end of the fixed contact 72 at an end where the second contact 721 is disposed; the fourth plate 622 is disposed on a side of the fourth grid set 4, which is close to the contact system 7, the second extending portion 624 is connected with an end of the fourth plate 622, which is close to the contact system 7, the second extending portion 624 extends along a direction from an end of the fourth plate 622, which is close to the contact system 7, to a direction, which is close to the first extending portion 613, the transition section 623 is connected with an end, which is far away from the fourth plate 622, of the second extending portion 624 and the third plate 621, and an arc striking channel is formed between the transition section 623 and the first extending portion 613.
In this embodiment, a downward magnetic blowing force can be formed at the second extension portion 624, and by providing the second extension portion 624, an electric arc generated when the moving contact 71 and the fixed contact 72 are disconnected can be more quickly introduced into the fifth grid sheet set 5, so that an arc striking effect is improved, and the breaking reliability of a product is ensured.
Optionally, in this embodiment, the transition section 623 is a transition arc, and is an arc plate, and a narrow channel is formed between the transition arc and the first extension portion 613, which can play a role of attracting an arc, that is, forming the arc striking channel. When the arc passes through the arc striking channel, the arc generated when the moving contact 71 and the fixed contact 72 are disconnected can be more quickly introduced into the fifth grid set 5 under the action of the first extension part 613 and the second extension part 624. Meanwhile, the transition section 623 is arc-shaped, the transition is smooth, and the arc-absorbing effect is good.
Optionally, in this embodiment and the first, second and fourth embodiments, the first plate 611 and the second plate 612 are also in arc transition; when the first striking plate 61 further includes the first extension portion 613, the first plate body 611, the second plate body 612, and the first extension portion 613 also adopt an arc transition therebetween.
In this embodiment, the first extension portion 613 and the second extension portion 624 are both sheet-like structures.
Alternatively, in this embodiment, as shown in fig. 3, all the fifth arc-extinguishing gate sheets 51 are staggered up and down, so that the electric arc can be prevented from being shorted at one side of the fifth arc-extinguishing gate sheet 51 far from the moving contact 71, and the breaking effect is affected.
Example IV
As shown in fig. 4, the fourth grid set 4 includes a plurality of fourth arc-extinguishing grid plates 41, a portion of the fourth arc-extinguishing grid plates 41 near the contact system 7 is disposed along a transverse direction, and a portion of the fourth arc-extinguishing grid plates 41 away from the contact system 7 is disposed along an oblique direction.
In this embodiment, the fourth arc-extinguishing grid 41 far away from the contact system 7 is disposed along an oblique direction, so that the distance between the contact system 7 and the fourth arc-extinguishing grid 41 is shortened, and the arc can enter the fourth grid set 4 rapidly.
The fifth grid set 5 includes a plurality of fifth arc-extinguishing grid plates 51, a portion of the fifth arc-extinguishing grid plates 51 close to the contact system 7 is disposed along a transverse direction, and a portion of the fifth arc-extinguishing grid plates 51 far from the contact system 7 is disposed along an oblique direction.
In this embodiment, the fifth arc extinguishing gate 51 far away from the contact system 7 is obliquely arranged, so that the distance between the contact system 7 and the fifth arc extinguishing gate 51 is shortened, and the arc can quickly enter the fifth gate group 5.
Preferably, as shown in fig. 4, the fourth gate group 4 and the fifth gate group 5 are symmetrically disposed.
In the present embodiment, the movable contact 71 is outside the fourth gate group 4 and the fifth gate group 5.
In the present embodiment, the first striking plate 61 is disposed between the fourth grid group 4 and the fifth grid group 5. The first plate body 611 extends towards the direction of the fourth grid set 4 to introduce an arc into the fourth grid set 4; the second plate 612 extends in the direction of the fifth grid set 5 to introduce an arc into the fifth grid set 5.
Optionally, in order to improve the arc striking capability, the first arc striking plate 61 is further provided with a first extending portion 613, the first extending portion 613 is V-shaped, the first extending portion 613 points to the contact system 7, and two ends of the first extending portion 613 are respectively connected to the first plate body 611 and the second plate body 612.
Optionally, as shown in fig. 1 to 4, in the arc extinguishing chamber provided by the utility model, a magnetism increasing member 9 is arranged in a direction of the fixed contact 72 close to the side plate 8.
In this embodiment, the magnetism increasing member 9 is provided to enhance the self-excitation magnetic field, ensure that the electric arc can be transferred quickly, reduce the breaking time of the circuit breaker, reduce the burn of the electric arc to the moving contact 71 and the fixed contact 72, and improve the current limiting capability.
Alternatively, as shown in fig. 1 to 4, the stationary contact 72 is provided with a sinking structure recessed away from the side plate 8. The magnetism increasing member 9 is disposed in the sinking structure, and the second contact 721 is located on an outer sidewall of the sinking structure, which is close to the moving contact 71.
In this embodiment, by arranging the sinking structure containing magnetism increasing member 9 on the fixed contact 72, the self-excitation magnetic field at the fixed contact 72 can be enhanced, the magnetic blowing force can be increased, the electric arc can be quickly transferred, and the breaking time of the circuit breaker can be reduced.
Alternatively, in this embodiment, the static striking plate 62 is located to the right of the opening of the submerged structure.
The utility model further provides a circuit breaker, which comprises the arc extinguishing chamber in any embodiment.
The circuit breaker provided in this embodiment includes all advantages of the arc extinguishing chamber, and is not described herein.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. An arc extinguishing chamber for a circuit breaker, the circuit breaker comprises a contact system (7), the contact system (7) comprises a moving contact (71) and a fixed contact (72), and the circuit breaker is characterized in that a moving arc striking plate (63) is arranged at the moving contact (71), and a fixed arc striking plate (62) is arranged at the fixed contact (72); the arc extinguishing chamber is provided with a side plate (8), the side plate (8) is provided with a first end (81) and a second end (82) which are oppositely arranged, three groups of grid sheet groups are sequentially arranged on the side plate (8) along the direction from the first end (81) to the second end (82), each group of grid sheet groups comprises a plurality of arc extinguishing grid sheets, and all the grid sheet groups are positioned between the movable arc striking plate (63) and the static arc striking plate (62);
a first arc striking plate (61) is arranged between two adjacent grid plate groups, the first arc striking plate (61) comprises a first plate body (611) and a second plate body (612), and one end of the first plate body (611) close to the contact system (7) is connected with one end of the second plate body (612) close to the contact system (7); the first plate body (611) directs an arc to the set of grid plates adjacent to the first plate body (611); -the second plate (612) directs an arc to the set of grid plates adjacent to the second plate (612);
an included angle A is formed between any one arc extinguishing grid sheet and the horizontal plane, wherein the included angle A is more than or equal to 0 degree and less than or equal to 90 degrees.
2. The arc chute of claim 1 wherein three of said sets of gate sheets are a first set of gate sheets (1), a second set of gate sheets (2) and a third set of gate sheets (3), respectively, in a direction from said second end (82) to said first end (81);
the first grid plate group (1) comprises a plurality of first arc extinguishing grid plates (11), all the first arc extinguishing grid plates (11) are arranged at intervals in the transverse direction, and any one of the first arc extinguishing grid plates (11) is parallel to the static arc striking plate (62);
the second grid plate group (2) comprises a plurality of second arc-extinguishing grid plates (21), and all the second arc-extinguishing grid plates (21) are arranged at intervals along the vertical direction;
the third grid plate group (3) comprises a plurality of third arc-extinguishing grid plates (31), and all the third arc-extinguishing grid plates (31) are arranged in an arc shape.
3. The arc chute according to claim 2, characterized in that the second arc chute sheet (21) is arranged horizontally or the second arc chute sheet (21) is arranged obliquely.
4. The arc chute according to claim 2, characterized in that said first striking plate (61) between said first set of grid plates (1) and said second set of grid plates (2) further comprises a first extension (613);
the first extension part (613) extends along the second plate body (612) towards a direction close to one end of the contact system (7), one end of the first extension part (613) is connected with one end of the first plate body (611) close to the contact system (7), and the other end of the first extension part is connected with one end of the second plate body (612) close to the contact system (7).
5. The arc chute of claim 1 wherein three of said sets of gate sheets are a first set of gate sheets (1), a second set of gate sheets (2) and a third set of gate sheets (3), respectively, in a direction from said second end (82) to said first end (81);
the first grid plate group (1) comprises a plurality of first arc-extinguishing grid plates (11), and all the first arc-extinguishing grid plates (11) are arranged in an arc shape;
the second grid plate group (2) comprises a plurality of second arc-extinguishing grid plates (21), and all the second arc-extinguishing grid plates (21) are arranged at intervals along the vertical direction;
the third grid plate group (3) comprises a plurality of third arc-extinguishing grid plates (31), and all the third arc-extinguishing grid plates (31) are arranged in an arc shape.
6. The arc chute of claim 5 wherein said second arc chute sheet (21) is disposed horizontally or said second arc chute sheet (21) is disposed obliquely.
7. The arc chute of claim 1 wherein the length of the first plate (611) is the same as the length of the second plate (612).
8. The arc chute according to claim 2 or 5, characterized in that any two of said second arc chute plates (21) are arranged in parallel.
9. The arc extinguishing chamber according to claim 1, characterized in that the side of the stationary contact (72) close to the side plate (8) is provided with a sinking structure recessed away from the side plate (8);
a magnetism increasing piece (9) is arranged in the sinking structure.
10. A circuit breaker comprising an arc chute as claimed in any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222347154 | 2022-09-02 | ||
| CN2022223471540 | 2022-09-02 |
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| Publication Number | Publication Date |
|---|---|
| CN219370956U true CN219370956U (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320046996.4U Active CN219370956U (en) | 2022-09-02 | 2023-01-06 | Arc extinguishing chamber and circuit breaker |
| CN202320046373.7U Active CN219370955U (en) | 2022-09-02 | 2023-01-06 | Arc extinguishing chamber and circuit breaker |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320046373.7U Active CN219370955U (en) | 2022-09-02 | 2023-01-06 | Arc extinguishing chamber and circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313589A (en) * | 2023-04-06 | 2023-06-23 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
-
2023
- 2023-01-06 CN CN202320046996.4U patent/CN219370956U/en active Active
- 2023-01-06 CN CN202320046373.7U patent/CN219370955U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313589A (en) * | 2023-04-06 | 2023-06-23 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
| CN116313589B (en) * | 2023-04-06 | 2023-11-17 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN219370955U (en) | 2023-07-18 |
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