CN220106308U - Circuit breaker - Google Patents

Abstract

The utility model provides a circuit breaker, which relates to the technical field of low-voltage electrical appliances and comprises a shell, wherein an arc extinguishing system and a wiring terminal are arranged in the shell, the arc extinguishing system is provided with an exhaust port for exhausting gas generated by arc extinction, and the exhaust port of the arc extinguishing system is positioned on the wiring terminal. The gas generated by arc extinction is discharged through the gas outlet, and the interface of the wiring terminal is used as the gas outlet, so that the special gas outlet is not independently arranged on the shell, the gas outlet is hidden at the wiring terminal, and the appearance attractiveness of the shell is improved. And the exhaust port is only used for exhausting, so that the zero flashover function can be realized.

Description

Circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a circuit breaker.

Background

The circuit breaker is a common electrical device, and the principle is that an operating mechanism is driven to act through a control handle, so that a moving contact and a fixed contact are contacted and switched on or separated from each other. When the circuit breaker is disconnected, an arc can be generated between the contacts, and at the moment, current in the circuit continues to flow until the arc is extinguished, and the current is disconnected after the contact gap becomes an insulating medium. The arc is introduced into the arc extinguishing chamber through the arc striking plate to extinguish the arc, gas and arc particles are generated after the arc is extinguished and are discharged through the exhaust port on the shell, and the special exhaust port on the shell influences the appearance of the circuit breaker.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a circuit breaker, wherein an exhaust port is hidden at a wiring terminal position, so that the attractiveness of the circuit breaker is improved, and zero flashover is realized.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the utility model is as follows:

the embodiment of the utility model provides a circuit breaker, which comprises a shell, wherein an arc extinguishing system and a wiring terminal are arranged in the shell, the arc extinguishing system is provided with an exhaust port for exhausting gas generated by arc extinction, and the exhaust port of the arc extinguishing system is positioned on the wiring terminal.

Optionally, the arc extinguishing system comprises an arc extinguishing chamber, an arc channel is arranged at an outlet of the arc extinguishing chamber, and the arc channel is communicated with the exhaust port.

Optionally, a filter screen is further arranged between the tail end of the arc channel and the exhaust port, and is used for intercepting arc particles of the leakage screen.

Optionally, the plurality of the arc channels are stacked along the first direction.

Optionally, in the first direction, a total height of the plurality of arc channels at an end near the arc extinguishing chamber is greater than a total height of the plurality of arc channels at an end near the exhaust port, so that the stacked plurality of arc channels form a funnel structure.

Optionally, a particle collecting structure is arranged below the arc channel to intercept arc particles generated by arc extinction.

Optionally, the particle collecting structure includes a plurality of collection platforms that connect gradually, and is a plurality of collection platforms is followed the arc way direction forms step structure, is close to the first collection platform of explosion chamber is in the height of first direction is less than the third collection platform that is close to the gas vent is in the height of first direction.

Optionally, the arc extinguishing chamber is an L pole arc extinguishing chamber.

Optionally, the arc extinguishing system further comprises an N-pole arc extinguishing chamber, and an inlet of the N-pole arc extinguishing chamber corresponds to the N-pole moving contact and the N-pole fixed contact above.

Optionally, the N pole arc extinguishing chamber and the L pole arc extinguishing chamber are stacked in a staggered manner, and the N pole arc extinguishing chamber is isolated from the L pole arc extinguishing chamber.

The beneficial effects of the utility model include:

the utility model provides a circuit breaker, wherein an arc extinguishing system and a connecting terminal are arranged in a shell, the arc extinguishing system is provided with an exhaust port for exhausting gas generated by arc extinction, and the exhaust port of the arc extinguishing system is positioned at the connecting terminal. The gas generated by arc extinction is discharged through the gas outlet, and the interface of the wiring terminal is used as the gas outlet, so that the special gas outlet is not independently arranged on the shell, the gas outlet is hidden at the wiring terminal, and the appearance attractiveness of the shell is improved. And the exhaust port is only used for exhausting, so that the zero flashover function can be realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present utility model;

fig. 2 is an external schematic view of a circuit breaker according to an embodiment of the present utility model;

fig. 3 is a second schematic structural diagram of a circuit breaker according to an embodiment of the present utility model;

fig. 4 is a third schematic structural diagram of a circuit breaker according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a circuit breaker according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a circuit breaker according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a circuit breaker according to an embodiment of the present utility model.

Icon: 10-a housing; 11-a middle cover; 100-arc extinguishing chamber; 101-an arc striking plate; 101 a-arc striking angle; 102-arc path; 103-filtering the mixture; 104-particle collection structure; 104 a-a first collection platform; 104 b-a second collection platform; 104 c-a third collection platform; 105-exhaust port; 106-N pole arc extinguishing chambers; 106 a-an arc striking channel; 107-N pole arc striking plate; 107 a-arc ignition angle; 201-L pole moving contact; 202-L pole static contact; 203-N pole movable contacts; 204-N pole static contact; 300-connecting terminals; f1-a first direction; f2-thickness direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. It should be noted that, under the condition of no conflict, the features of the embodiments of the present utility model may be combined with each other, and the combined embodiments still fall within the protection scope of the present utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "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; 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.

Referring to fig. 1 and 2, an embodiment of the present utility model provides a circuit breaker, which includes a housing 10, wherein an arc extinguishing system and a connection terminal 300 are disposed in the housing 10, the arc extinguishing system has an exhaust port 105 for exhausting gas generated by arc extinguishing, and the exhaust port 105 of the arc extinguishing system is located in the connection terminal 300.

The arc extinguishing system is positioned in the middle of the bottom of the shell 10, the wiring terminals 300 are respectively arranged at two sides of the bottom of the shell 10, and gas generated during arc extinguishing of the arc extinguishing system is discharged from the gas outlet 105; the connection terminal 300 can be spliced for external connection; of course, the terminal 300 in the form of a conventional screw may also be adapted to the arc extinguishing structure of the present utility model.

In the present utility model, as shown in fig. 2 and 3, the air outlet 105 is located in the connection terminal 300, in other words, the plug interface of the connection terminal 300 is used as the air outlet 105, so that the case 10 is prevented from being separately provided with an additional air outlet.

Thus, in the circuit breaker provided by the embodiment of the utility model, the arc extinguishing system and the connecting terminal 300 are arranged in the shell, the arc extinguishing system is provided with the exhaust port 105 for exhausting gas generated by arc extinction, and the exhaust port 105 of the arc extinguishing system is positioned on the connecting terminal 300. The gas generated by arc extinction is discharged through the gas outlet 105, and the plug-in port of the wiring terminal 300 is adopted as the gas outlet 105, so that a special gas outlet is not independently arranged on the shell 10, the gas outlet 105 is hidden at the wiring terminal 300, and the appearance attractiveness of the shell 10 is improved. The exhaust port 105 is used only for exhaust, and a zero arcing function can be realized.

In one embodiment of the present utility model, the circuit breaker of the present utility model is a circuit breaker of a dual contact system, in which an L-pole contact system and an N-pole contact system are stacked in a thickness direction F2 inside the case 10, and correspondingly, an L-pole arc extinguishing system and an N-pole arc extinguishing system are stacked in the thickness direction F2 inside the case 10; the L-pole arc extinguishing system corresponds to the L-pole contact system, and arc extinguishing of the L-pole contact system is completed; the N-pole arc extinguishing system corresponds to the N-pole contact system, and arc extinguishing of the N-pole contact system is completed; the L pole and the N pole are isolated by a middle cover 11.

The L-stage arc extinguishing system comprises an L-stage arc extinguishing chamber and an L-stage arc striking plate which are respectively arranged at two sides of the L-stage contact system, wherein at this time, the arc extinguishing chamber 100 is the L-stage arc extinguishing chamber, the arc striking plate 101 is the L-stage arc striking plate, and the arc extinguishing chamber 100 is taken as the L-stage arc extinguishing chamber for illustration; the arc striking plate 101 extends to the arc extinguishing chamber 100, an arc passage 102 is arranged at the outlet of the arc extinguishing chamber 100, and the arc passage 102 is communicated with the exhaust port 105; the arc of the L-pole contact system is introduced into the arc extinguishing chamber 100 through the striking plate 101 and then flows to the exhaust port 105 through the arc chute 102.

For the L pole, as shown in FIG. 1, the L pole contact system is positioned at the middle part of the shell 10 to the right, the L pole static contact 202 is positioned at the left side in the length direction in the shell 10, and the L pole moving contact 201 is positioned at the right side; and the arc extinguishing chamber 100 is positioned between the L pole static contact 202 and the bottom of the shell 10, the upper end arc striking angle 101a of the arc striking plate 101 is positioned on the right side of the L pole moving contact 201, and the whole arc striking plate 101 extends downwards the shell 10 until extending to the lower part of the arc extinguishing chamber 100.

The inlet of the arc extinguishing chamber 100 corresponds to the arc striking plate 101, and an arc channel 102 is arranged at the outlet of the arc extinguishing chamber 100; the contact point of the L-pole moving contact 201 and the L-pole fixed contact 202 is positioned above the arc striking plate 101, when the circuit breaker breaks, an arc generated between the L-pole moving contact 201 and the L-pole fixed contact 202 is introduced into the arc extinguishing chamber 100 through the arc striking plate 101 to extinguish the arc, and gas generated after the arc extinguishing flows out of the shell 10 after passing through the arc passage 102 and the exhaust port 105 in sequence.

Further, an arc path 102 is formed on the middle cover 11, the arc path 102 and the middle cover 11 are in an integral structure, and the tail end of the arc path 102 forms an outlet on the middle cover 11, and the outlet is communicated with the wiring terminal 300, so that gas generated by arc extinction is discharged; it is also possible that a partition plate is provided in the housing 10 between the tail end of the arc path 102 and the connection terminal 300, and an outlet is provided on the partition plate, the outlet is communicated with the connection terminal 300, and the gas is discharged through the tail end of the arc path 102, the outlet and the gas outlet 105.

Particularly, as shown in fig. 4, the arc path 102 of the present utility model is an S-shaped arc path, which is advantageous for collecting and extinguishing the arc compared with the existing common arc path due to the arrangement of the S-shaped arc path, so that the path of the arc path 102 is increased; meanwhile, in the limited space of the shell 10, the S-shaped arc channel occupies small space, space can be effectively utilized, the L-pole arc extinguishing system is compact in arrangement and reasonable in layout, and the space utilization rate in the shell 10 is high.

In addition, a filter screen 103 is disposed between the tail end of the arc channel 102 and the exhaust port 105 for intercepting arc particles of the leaky mesh. The filter screen 103 is arranged to intercept arc particles of the leakage net, and gas generated by arc extinction is discharged from the exhaust port 105 of the wiring terminal 300 after passing through the filter screen 103, and the arc particles are not discharged from the exhaust port 105 due to interception, so that the zero arcing function of the circuit breaker can be realized.

The terminals 300 are respectively provided at both sides in the length direction within the housing 10 to serve as an inlet terminal and an outlet terminal; the connecting terminal 300 positioned at the left side in the shell 10 and at the outlet of the arc channel 102 can be used as the air outlet 105 at the same time, thereby effectively utilizing the space in the shell 10. And the right-hand terminal 300 in the housing 10 is located below the striking corner 101a of the striking plate 101.

Further, there are a plurality of the arc channels 102, the plurality of the arc channels 102 are stacked along the first direction F1, and in the first direction F1, the total height of the plurality of the arc channels 102 at an end near the arc extinguishing chamber 100 is greater than the total height of the plurality of the arc channels 102 at an end near the exhaust port 105, so that the stacked plurality of the arc channels 102 form a funnel structure.

The arc channels 102 are stacked in the first direction F1, the first direction F1 is the height direction of the housing 10, and the arc channels 102 are stacked upward from the bottom of the housing 10, so that the gas generated by arc extinction flows out from the arc extinguishing chamber 100 and then flows out through the arc channels 102.

Because the arc passage 102 is the arc passage 102, the end of the arc passage 102 connected with the arc extinguishing chamber 100 is higher than the end of the arc passage 102 connected with the exhaust port 105, so that when a plurality of arc passages 102 are stacked, the total height of a plurality of arc passages 102 close to one end of the arc extinguishing chamber 100 is larger than the total height of a plurality of arc passages 102 close to one end of the exhaust port 105, so that the plurality of arc passages 102 are integrally formed into a funnel-shaped structure (a dotted line area in fig. 4) with high right end and low left end, and the arrangement is beneficial to the collection and extinction of electric arcs, and further enhances the arc extinguishing effect.

On the basis, a particle collecting structure 104 is arranged below the bottommost arc channel 102 in the first direction F1 to further intercept arc particles generated by arc extinction.

The particle collecting structure 104 includes a plurality of collecting platforms connected in sequence, the collecting platforms form a step structure along the arc path 102, and the height of the first collecting platform 104a near the arc extinguishing chamber 100 in the first direction F1 is smaller than the height of the third collecting platform 104c near the exhaust port 105 in the first direction F1.

As shown in fig. 4 and 5, the plurality of arc channels 102 are laminated along the first direction F1, that is, the height direction of the housing 10, and a step structure formed by a plurality of collecting platforms is provided on the inner bottom wall of the housing 10 below the bottommost arc channel 102, and the step structure is provided along the airflow direction of the arc channel 102, that is, from the arc extinguishing chamber 100 to the exhaust port 105; the height of the first collecting platform 104a near the arc extinguishing chamber 100 in the first direction F1 is smaller than the height of the third collecting platform 104c near the exhaust port 105 in the first direction F1, in other words, the plurality of collecting platforms are arranged from low to high along the airflow direction of the arc chute 102, so that the outflow of the exhaust airflow is not affected. Illustratively, three collection platforms are shown in fig. 1, namely a first collection platform 104a, a second collection platform 104b, and a third collection platform 104c, with the first collection platform 104a, the second collection platform 104b, and the third collection platform 104c being arranged from low to high.

The collecting platform is used for intercepting arc particles, the arc particles generated by arc extinction fall onto the collecting platform under the action of gravity, and scattered arc particles are collected in a layered and segmented mode through steps, so that the arc particles are prevented from being sprayed out of the exhaust port 105.

The above-mentioned case of taking the arc-extinguishing chamber 100 as the L-pole arc-extinguishing chamber as an example, when the circuit breaker is a single-contact circuit breaker, i.e., the circuit breaker is a conventional circuit breaker, the circuit breaker has one contact system and one arc-extinguishing system (one arc-extinguishing chamber 100), and the above-mentioned structure can be commonly used in the conventional circuit breaker.

When the circuit breaker is a double-contact circuit breaker and has an L-stage arc extinguishing system and an N-stage arc extinguishing system, the N-stage arc extinguishing system corresponds to the N-stage arc extinguishing system, and as shown in fig. 6, in the height direction of the housing 10, the N-stage contact system is located above the N-stage arc extinguishing chamber 106, and the inlet of the N-stage arc extinguishing chamber 106 corresponds to the N-stage moving contact 203 and the N-stage stationary contact 204 above.

The inlet of the N-pole arc-extinguishing chamber 106 faces the N-pole moving contact 203 and the N-pole fixed contact 204, and when the breaker breaks, an electric arc generated by the N-pole moving contact 203 and the N-pole fixed contact 204 directly enters the N-pole arc-extinguishing chamber 106 to be extinguished under the action of the N-pole arc striking plate 107.

The two sides of the N-pole arc extinguishing chamber 106 are respectively provided with an N-pole fixed contact 204 and an N-pole arc striking plate 107, so that an arc striking channel 106a is formed at the inlet of the N-pole arc extinguishing chamber 106, and the contact point of the N-pole moving contact 203 and the N-pole fixed contact 204 is positioned in the arc striking channel 106 a.

The arc-extinguishing chamber inlet of the traditional 1P+N circuit breaker faces to the right, N-pole electric arcs are weaker than L-pole electric arcs, and the traditional N-pole arc-extinguishing structure occupies more space.

In the utility model, an N-pole arc extinguishing chamber 106 is positioned at the right side of the bottom of a shell 10, and the right side of the N-pole arc extinguishing chamber is a wiring terminal 300; an N-pole fixed contact 204 is tightly attached to the left side of the N-pole arc-extinguishing chamber 106, the bottom of the N-pole fixed contact 204 is flush with the bottom of the N-pole arc-extinguishing chamber 106, and the upper end of the N-pole fixed contact 204 is folded back and extends upwards beyond the upper end of the N-pole arc-extinguishing chamber 106; the right side of the N-pole arc extinguishing chamber 106 is tightly attached with an N-pole arc striking plate 107, and is consistent with the N-pole fixed contact 204, the bottom of the N-pole arc striking plate 107 is level with the bottom of the N-pole arc extinguishing chamber 106, and an arc striking angle 107a at the upper end of the N-pole arc striking plate 107 extends upwards beyond the upper end of the N-pole arc extinguishing chamber 106; in this way, the N-pole arc extinguishing chamber 106 is clamped by the N-pole fixed contact 204 and the N-pole arc striking plate 107, and because the N-pole fixed contact 204 and the N-pole arc striking plate 107 extend beyond the upper end of the N-pole arc extinguishing chamber 106, an arc striking channel 106a is formed at the inlet position of the N-pole arc extinguishing chamber 106, and the contact point between the N-pole moving contact 203 and the N-pole fixed contact 204 is located in the arc striking channel 106a, so that the arc generated between the N-pole moving contact 203 and the N-pole fixed contact 204 is directly introduced into the N-pole arc extinguishing chamber 106 below through the N-pole arc striking plate 107 via the arc striking channel 106a, and arc extinguishing is completed in the N-pole arc extinguishing chamber 106, thus solving the problem of overlong arc striking channel of the N-pole arc extinguishing chamber 106 of the traditional circuit breaker, and avoiding space occupation.

The N-pole contact system, the N-pole arc extinguishing system, the L-pole contact system and the L-pole arc extinguishing system are isolated by the middle cover 11 to isolate the L-pole and the N-pole. For the arc extinguishing chamber, as shown in fig. 7, the N-pole arc extinguishing chamber 106 and the L-pole arc extinguishing chamber are stacked in a staggered manner, and the N-pole arc extinguishing chamber 106 and the L-pole arc extinguishing chamber are also isolated by the middle cover 11.

Not only range upon range of, keep apart between N utmost point explosion chamber 106 and the L utmost point explosion chamber, and N utmost point explosion chamber 106 and the dislocation set of L utmost point explosion chamber to carry out the arc extinguishing respectively, can make the whole comprehensive arc extinguishing's of circuit breaker effect best like this.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The circuit breaker is characterized by comprising a shell (10), wherein an arc extinguishing system and a wiring terminal (300) are arranged in the shell (10), the arc extinguishing system is provided with an exhaust port (105) for exhausting gas generated by arc extinguishing, and the exhaust port (105) of the arc extinguishing system is positioned on the wiring terminal (300).

2. The circuit breaker according to claim 1, characterized in that the arc extinguishing system comprises an arc extinguishing chamber (100), the outlet of the arc extinguishing chamber (100) being provided with an arc channel (102), the arc channel (102) being in communication with the exhaust opening (105).

3. Circuit breaker according to claim 2, characterized in that a screen (103) is also provided between the tail end of the arc channel (102) and the exhaust opening (105) for intercepting the arc particles of the leaky screen.

4. A circuit breaker according to claim 3, characterized in that there are a plurality of said arc tracks (102), a plurality of said arc tracks (102) being stacked along a first direction (F1).

5. The circuit breaker according to claim 4, characterized in that in the first direction (F1), the total height of the plurality of arc channels (102) at an end near the arc extinguishing chamber (100) is greater than the total height of the plurality of arc channels (102) at an end near the exhaust port (105), so that the stacked plurality of arc channels (102) form a funnel-shaped structure.

6. The circuit breaker according to claim 4, characterized in that a particle collection structure (104) is provided below the arc chute (102) to intercept arc particles generated by arc extinction.

7. The circuit breaker according to claim 6, characterized in that the particle collection structure (104) comprises a plurality of collection platforms connected in sequence, a plurality of which form a step structure along the arc path (102), the height of the first collection platform (104 a) near the arc extinguishing chamber (100) in the first direction (F1) being smaller than the height of the third collection platform (104 c) near the exhaust opening (105) in the first direction (F1).

8. Circuit breaker according to any of claims 2 to 7, characterized in that the arc chute (100) is an L-pole arc chute.

9. The circuit breaker of claim 8, wherein the arc extinguishing system further comprises an N-pole arc extinguishing chamber (106), an inlet of the N-pole arc extinguishing chamber (106) corresponding to an upper N-pole moving contact (203) and an N-pole stationary contact (204).

10. The circuit breaker of claim 9, wherein the N-pole arc chute (106) and the L-pole arc chute are stacked in a staggered manner, and wherein the N-pole arc chute (106) is isolated from the L-pole arc chute.