CN220253163U - Circuit breaker with contact cover - Google Patents

Abstract

The utility model provides a circuit breaker with a contact cover, which comprises a fixed contact system and a moving contact system, wherein the moving contact system comprises a long contact assembly and a short contact assembly, the short contact assembly is distributed at two sides or one side of the long contact assembly, and the part of the long contact assembly extending out of the short contact assembly is wrapped with an inner contact cover which is heated to generate gas to blow the arc into an arc extinguishing grid sheet when the arc is generated.

Description

Circuit breaker with contact cover

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with a contact cover.

Background

The circuit breaker is the most important distribution equipment in low-voltage distribution system, along with the continuous improvement of the requirement of power transmission and distribution equipment, the requirement on the product for circuit protection switch performance is also higher and higher, miniaturization, high performance, modularization, high reliability are the main development direction of circuit breaker at present, contact and arc extinguishing system are the important component part of circuit breaker, contact shape and size design in the contact system are critical, the electrical life and breaking capacity of circuit breaker are directly related to, in the prior art, in the application of publication No. CN108597969A, the circuit breaker includes the movable contact system, the movable contact system includes short contact subassembly and long contact subassembly, when the circuit breaker breaks the floodgate, long contact subassembly is with electric current conduction to short contact subassembly, the electric arc that short contact subassembly produced gets into the arc extinguishing grid piece through the guide of striking arc extinguishing grid piece in, but the array arrangement of multi-piece arc extinguishing grid piece, and the depth that the arc extinguishing grid piece is arranged and formed is longer, because there is not rear thrust in the time of reaching the arc extinguishing grid piece, can only stay in the grid piece position that compares the entry, the position of entering grid piece, thereby the bad effect is not led to.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defect of poor arc extinguishing effect caused by the fact that the arc only stays at the position of the entrance of the arc extinguishing grid sheet when the arc enters the arc extinguishing grid sheet in the prior art, and thereby the circuit breaker with the contact cover sleeved outside the long contact assembly is provided.

To this end, the utility model provides a circuit breaker with a contact cover, comprising: the circuit breaker comprises a fixed contact system and a moving contact system, wherein the moving contact system comprises a long contact assembly and a short contact assembly, the short contact assembly is distributed at two sides or one side of the long contact assembly, and the part, extending out of the short contact assembly, of the long contact assembly wraps an inner contact cover which is heated to generate gas to blow an arc into an arc extinguishing grid when the arc is generated.

Further: the fixed contact system comprises a first fixed contact in contact with a long contact assembly and a second fixed contact in contact with a short contact assembly, wherein the long contact assembly is composed of at least one conductive sheet, one end of the conductive sheet, which is in contact with the first fixed contact, is provided with a contact point, and an avoidance groove for avoiding the contact point is formed in a contact cover.

Further: the contact cover is provided with a plurality of separation sheets, and each separation sheet is inserted between two adjacent conductive sheets to separate the conductive sheets.

Further: the contact cover comprises a first connecting cover provided with an avoidance groove and/or a separation sheet and a second connecting cover detachably connected with the first connecting cover, and the first connecting cover and the second connecting cover enclose an avoidance space for wrapping the long contact assembly.

Further: the avoidance groove is arranged on the first connecting cover, and the separation sheet is arranged on the second connecting cover.

Further: the conducting strip includes extension piece and is equipped with the rotor piece of contact, the rotor piece is "L" structural setting with the extension piece, the extension piece extends towards one side of keeping away from first stationary contact and second stationary contact, the separation piece is including the first spacer that is used for separating the extension piece and the second spacer that is used for separating the rotor piece, the length of first spacer is longer than the length of extension piece.

Further: the first spacer 51 has a length of more than 0mm and less than 100mm.

The technical scheme of the utility model has the following advantages:

1. according to the circuit breaker with the contact cover, when the circuit breaker is opened, the moving contact system comprises the long contact assembly and the short contact assembly, the electric arc is concentrated onto the long contact assembly from the short contact assembly along with opening of the circuit breaker, the electric arc is guided into the arc extinguishing grid sheet through the arc striking plate, namely, the arc extinguishing chamber is arranged, in order to enable the electric arc to enter a deeper position of the arc extinguishing chamber, the contact cover is arranged outside the long contact assembly and made of an arc blowing material, the circuit breaker can generate the electric arc in the opening process, so that the temperature of the long contact assembly is increased, the long contact assembly conducts heat to the contact cover, a large amount of arc blowing gas is generated by the contact cover, and accordingly thrust is given to the electric arc, the electric arc is pushed to the deeper position of the arc extinguishing chamber, and therefore the arc extinguishing effect of a product is improved.

2. The utility model provides a circuit breaker with a contact cover, wherein a fixed contact system comprises a first fixed contact and a second fixed contact, a long contact assembly can be composed of 2-4 conductive sheets, the conductive sheets are provided with contacts, the contacts are used for contacting with the first fixed contact when the circuit breaker is switched on, and in order to ensure that the long contact assembly can contact with the contacts of the first fixed contact, the contact cover is provided with an avoidance groove for avoiding the contacts, so that the long contact assembly can contact with the first fixed contact, and switching-on and electrifying are completed.

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 sectional view of an overall structure of a circuit breaker;

fig. 2 is a schematic sectional structure of a circuit breaker;

FIG. 3 is a diagram of the positional relationship between a moving and stationary contact system and an arc chute;

FIG. 4 is a schematic diagram of the overall structure of the moving contact assembly;

fig. 5 is a schematic view of the overall structure of the contact cover.

Reference numerals illustrate:

1. a long contact assembly; 11. a conductive sheet; 111. a rotating piece; 112. an extension piece; 12. a contact; 2. a short contact assembly; 21. a rotating lever; 22. a driving mechanism; 3. a contact cover; 31. a first connection cover; 32. a second connection cover; 4. a first stationary contact; 41. a second stationary contact; 5. a separator sheet; 51. a first spacer; 52. a second spacer; 6. avoiding the groove.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" 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 either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between 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.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The embodiment provides a circuit breaker with contact cover, includes: the circuit breaker comprises a fixed contact system and a moving contact system, wherein the moving contact system comprises a long contact assembly 1, short contact assemblies 2 are distributed on two sides and/or one side of the long contact assembly 1, and the part, extending out of the short contact assemblies 2, of the long contact assembly 1 wraps an inner contact cover 3 which is heated to generate gas to blow an arc into an arc extinguishing grid when the arc is generated.

The specific improvement is as follows: the circuit breaker includes static contact system and moving contact system, when closing a floodgate, moving contact system and static contact system contact circular telegram, moving contact system includes long contact subassembly 1 and short contact subassembly 2, short contact subassembly 2 distributes in the both sides of long contact subassembly 1, set up contact cover 3 on the long contact subassembly 1, in the moment that the switching-on state switches to the separating brake, can produce the electric arc, the production of electric arc leads to the temperature rise of long contact subassembly 1, long contact subassembly 1 will heat conduction to contact cover 3 on, contact cover 3 produces a large amount of arc gases that blow, thereby give electric arc a thrust, push electric arc to the deeper position department of explosion chamber, thereby improve the arc extinguishing effect of product.

Based on the above embodiments: the fixed contact system comprises a first fixed contact 4 in contact with a long contact assembly and a second fixed contact 41 in contact with a short contact assembly, the long contact assembly 1 is composed of at least one conductive sheet 11, one end of the conductive sheet 11 in contact with the first fixed contact 4 is provided with a contact 12, and the contact cover 3 is provided with an avoidance groove 6 for avoiding the contact 12.

The specific improvement is as follows: as shown in fig. 1-4, the long contact assembly 1 is mostly formed by arranging 1-6 conductive sheets 11, the specific number of the conductive sheets 11 can be freely selected according to the actual situation of a product, the static contact system comprises a first static contact 4 and a second static contact 41, the first static contact 4 is contacted with a contact 12 of the long contact assembly 1, the second static contact 41 is contacted with a silver point of the short contact assembly 2, in order to ensure that the contact 12 of the long contact assembly 1 can be contacted with the first static contact 4, an avoidance groove 6 for avoiding the contact 12 is arranged on the contact cover 3, the long contact assembly 1 can be contacted with the first static contact 4 through the arrangement of the avoidance groove 6, the short contact assembly 2 is firstly separated from the second static contact 41 when the breaker is opened, at this time, the current can be completely transferred from the short contact assembly 2 to the long contact assembly 1, then the long contact assembly 1 is separated from the first fixed contact 4, an arc is generated in the moment of separation, the long contact assembly 1 is nearer to the arc extinguishing chamber, the number of conductive sheets 11 of the long contact assembly 1 is smaller, the conductive sheets 11 can be enabled to be in quick contact with the arc extinguishing chamber when the arc is generated, in addition, after the arc is generated, the contact cover 3 can generate a large amount of gas in a high-temperature environment to blow the arc into the arc extinguishing chamber, so that quick arc extinguishing is realized, and the first connecting cover 31 and the second connecting cover 32 form air blowing in the high-temperature environment, so that the burning time of the arc on the contacts 12 can be effectively reduced, and the service life of products is prolonged.

Based on the above embodiments: the contact cover 3 is provided with a plurality of separation sheets 5, and each separation sheet 5 is inserted between two adjacent conductive sheets 11 to separate the conductive sheets 11.

The specific improvement is as follows: as shown in fig. 5, a plurality of separation sheets 5 are arranged on the contact cover 3, the separation sheets 5 are inserted between two adjacent conductive sheets 11, the separation sheets 5 are used for separating the conductive sheets 11, the placement sequence is that the separation sheets 5-conductive sheets 11-separation sheets 5-conductive sheets 11, the circuits of the conductive sheets 11 are connected in parallel, according to ohm's law, the parallel circuit divides current, the current passing between each conductive sheet 11 is 25A assuming that the current is 100A, if the conductive sheets 11 are 4 sheets, if the separation sheets 5 are not arranged, the adjacent conductive sheets 11 are easily welded together under the condition of high temperature due to the fact that the gap between the adjacent conductive sheets 11 is relatively short, the current passing through the welded conductive sheets 11 is equal to one circuit, the current passing through the welded conductive sheets is changed from 25A to 100A instantly, thus the instant damage of products is easily caused, and through the arrangement of the separation sheets 5, even under the high temperature environment, the conductive sheets 11 between the adjacent conductive sheets are not welded together, and the products are well protected.

Based on the above embodiments: the contact cover 3 comprises a first connecting cover 31 provided with an avoidance groove 6 and/or a separation sheet 5 and a second connecting cover 32 detachably connected with the first connecting cover 31, and the first connecting cover 31 and the second connecting cover 32 enclose to form an avoidance space for wrapping the long contact assembly 1.

Based on the above embodiments: the avoidance groove 6 is arranged on the first connecting cover 31, and the separation sheet 5 is arranged on the second connecting cover 32.

The specific improvement is as follows: as shown in fig. 5, the contact cover 3 includes a first connection cover 31 and a second connection cover 32, the first connection cover 31 and the second connection cover 32 can be connected by adopting various detachable connection modes such as fastening, clamping, screw connection and the like, so long as the first connection cover 31 and the second connection cover 32 can be fixed together, the first contact cover 3 and the second contact cover 3 are wrapped outside the long contact assembly 1, an avoidance space avoiding the long contact assembly 1 is formed inside the first contact cover 3 and the second contact cover 3, in the actual use process, as long as the first contact cover 3 or the second contact cover 3 can be fixed on the long contact assembly 1 and can ensure synchronous swing among the plurality of conductive sheets 11, the first contact cover 3 and the second contact cover 3 can also be independently used, the first contact cover 3 and the second contact cover 3 can connect the plurality of conductive sheets 11 together, in the brake-off or brake-on process, the first contact cover 3 and the second contact cover 3 buckle a plurality of conductive sheets 11 together, can ensure the consistency of the swing of the conductive sheets 11, reduce the relative swing between the conductive sheets 11, and in the process of opening the switch, a rotating rod 21 is penetrated between the long contact component 1 and the short contact component 2, when the long contact component 1 and the short contact component 2 are switched on and off, the rotating rod 21 can be used as a hinging point to rotate clockwise or anticlockwise, a driving mechanism 22 is connected behind the rotating rod 21, how the driving mechanism 22 is linked like the rotating rod 21 and how to drive the moving contact system to move is the prior art, the moving contact system is not additionally provided with spring pressure from the driving component and electric repulsive force opposite to the spring pressure, when the switch is opened, the electric repulsive force is larger than the spring pressure, the moving contact system is separated from the fixed contact system, after the switch is separated, because under the effect of electric repulsion and spring pressure, the moving contact system can swing as if around the direction of the hinge point because of inertia, and through the setting of contact cover 3, contact cover 3 ties a plurality of conducting strips 11 together, and whole weight is great relatively, and corresponding wobbling inertia then can reduce, just so can reduce the relative spring of conducting strip 11 in the separating brake in-process.

Based on the above embodiments: the conductive sheet 11 comprises an extension sheet 112 and a rotating sheet 111 provided with contacts, the rotating sheet 111 and the extension sheet 112 are arranged in an L-shaped structure, the extension sheet 112 extends towards one side far away from the first fixed contact 4 and the second fixed contact 41, the separation sheet 5 comprises a first separation sheet 51 for separating the extension sheet 112 and a second separation sheet 52 for separating the rotating sheet 111, and the length of the first separation sheet 51 is longer than that of the extension sheet 112.

Based on the above embodiments: the first spacer 51 has a length of more than 0mm and less than 100mm.

The specific improvement is as follows: as shown in fig. 4, the conductive sheet 11 includes an extension sheet 112 and a rotating sheet 111 on which the contact 12 is disposed, the separation sheet 5 includes a first separation sheet 51 and a second separation sheet 52, the first separation sheet 51 is used for separating the extension sheet 112, the second separation sheet 52 is used for separating the rotating sheet 111, by disposing the first separation sheet 51 and the second separation sheet 52, the rotating sheet 111 and the extension sheet 112 can be effectively prevented from being welded together in a high-temperature environment, the length of the first separation sheet 51 is longer than that of the extension sheet 112, the extension sheet 112 is located in the first separation sheet 51, when the first separation sheet 51 is disposed longer, the generated arc blowing gas is more, the formed area is larger, the arc blowing effect is stronger, and thus the arc can reach a deeper position of the arc extinguishing chamber, and effective arc extinguishing is realized.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (7)

1. A circuit breaker with contact cover, characterized in that: comprising the following steps: the circuit breaker comprises a fixed contact system and a moving contact system, wherein the moving contact system comprises a long contact assembly (1) and a short contact assembly (2), the short contact assembly (2) is distributed at two sides or one side of the long contact assembly (1), and a part, extending out of the short contact assembly (2), of the long contact assembly (1) is wrapped with a contact cover (3) which is heated to generate gas to blow an arc into an arc extinguishing grid when the arc is generated.

2. A circuit breaker with contact cover according to claim 1, characterized in that: the fixed contact system comprises a first fixed contact (4) in contact with a long contact assembly and a second fixed contact (41) in contact with a short contact assembly, the long contact assembly (1) is composed of at least one conducting sheet (11), one end of the conducting sheet (11) in contact with the first fixed contact (4) is provided with a contact (12), and an avoidance groove (6) for avoiding the contact (12) is formed in the contact cover (3).

3. A circuit breaker with contact cover according to claim 2, characterized in that: the contact cover (3) is provided with a plurality of separation sheets (5), and each separation sheet (5) is inserted between two adjacent conductive sheets (11) to separate the conductive sheets (11).

4. A circuit breaker with contact cover according to claim 3, characterized in that: the contact cover (3) comprises a first connecting cover (31) provided with an avoidance groove (6) and/or a separation sheet (5) and a second connecting cover (32) detachably connected with the first connecting cover (31), and the first connecting cover (31) and the second connecting cover (32) enclose to form an avoidance space for wrapping the long contact assembly (1).

5. The circuit breaker with contact cover of claim 4, wherein: the avoidance groove (6) is arranged on the first connecting cover (31), and the separation sheet (5) is arranged on the second connecting cover (32).

6. A circuit breaker with contact cover as claimed in claim 5, wherein: the conductive sheet (11) comprises an extension sheet (112) and a rotating sheet (111) provided with a contact, the rotating sheet (111) and the extension sheet (112) are arranged in an L-shaped structure, the extension sheet (112) extends towards one side far away from the first fixed contact (4) and the second fixed contact (41), the separation sheet (5) comprises a first separation sheet (51) for separating the extension sheet (112) and a second separation sheet (52) for separating the rotating sheet (111), and the length of the first separation sheet (51) is longer than that of the extension sheet (112).

7. The circuit breaker with contact cover of claim 6, wherein: the first spacer (51) has a length of greater than 0mm and less than 100mm.