Circuit breaker with arc recoil prevention structure

Abstract

The utility model relates to a circuit breaker with an arc recoil prevention structure. The circuit breaker mainly solves the problem that recoil possibly exists when electric arcs of a conventional circuit breaker are discharged. The circuit breaker is characterized in that the circuit breaker also comprises a baffle wall (11) which is arranged in the shell, one side of the baffle wall is used for installing a wiring frame, and the other side of the baffle wall is arranged opposite to an air outlet groove (21) at the back of the arc extinguish chamber; and the arc guide plate (3) is arranged between the baffle wall and the arc extinguish chamber and is used for guiding the gas reflected by the baffle wall to a gas outlet. The utility model provides a circuit breaker with an arc backlash prevention structure, which can guide backlash gas to a gas outlet as much as possible and prevent the backlash gas from returning to an arc extinguish chamber.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a circuit breaker with an arc recoil protection structure. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time.

[0003] Most circuit breakers have an arc extinguishing chamber inside to extinguish the arc. An arc outlet groove is set on the back of the arc extinguishing chamber to discharge the arc out of the casing. Circuit breakers often have a retaining wall for installing a wiring frame, which will affect the arc discharge and even cause arc recoil. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a leakage protection switch with a terminal isolation protection structure, which mainly solves the problem that the arc of a conventional circuit breaker may have a recoil when it is discharged.

[0005] The technical solution of the utility model is:

[0006] A circuit breaker with an arc-recoil protection structure comprises a housing, an action mechanism and an arc-extinguishing mechanism are arranged in the housing, the arc-extinguishing mechanism comprises an arc-extinguishing chamber, an air outlet is arranged through the housing, and further comprises

[0007] A retaining wall is arranged in the housing, one side of the retaining wall is used to install the wiring frame, and the other side of the retaining wall is arranged opposite to the gas outlet groove at the back of the arc extinguishing chamber;

[0008] An arc guide plate is arranged between the baffle wall and the arc extinguishing chamber, and is used for guiding the gas reflected by the baffle wall to the gas outlet.

[0009] An air outlet channel is formed between the baffle wall and the inner wall of the bottom of the shell, one end of the arc guide plate is arranged opposite to the baffle wall, and the other end extends toward the air outlet channel.

[0010] There is a gap between the bottom of the arc guide plate and the bottom inner wall of the shell.

[0011] The arc guide plate is an arc-shaped plate structure.

[0012] The arc guide plates are provided on both inner walls of the shell.

[0013] It also includes an upper guide plate, one end of which is close to the blocking wall and the other end of which extends toward the top end surface of the arc guide plate.

[0014] An empty groove is provided between the upper guide plate and the arc guide plate.

[0015] The shell includes a middle shell, a front shell and a rear shell, the action mechanism is installed between the middle shell and the front shell, the reclosing mechanism is installed between the middle shell and the rear shell, the middle shell and the front shell are installed together by rivets, and the middle shell and the rear shell are connected by screws.

[0016] The beneficial effect of the utility model is that the utility model provides a circuit breaker with an arc recoil protection structure, which can guide the recoil gas to the gas outlet as much as possible to prevent the gas from returning to the arc extinguishing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is an exploded schematic diagram of an embodiment of the utility model.

[0018] Figure 2 It is a partial three-dimensional schematic diagram of an embodiment of the utility model.

[0019] Figure 3 It is a partial three-dimensional schematic diagram of an embodiment of the utility model.

[0020] Figure 4 It is a partial cross-sectional schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings: As shown in the figure, a circuit breaker with an arc-recoil protection structure includes a housing 1, wherein an action mechanism and an arc-extinguishing mechanism are arranged in the housing, wherein the arc-extinguishing mechanism includes an arc-extinguishing chamber 2, wherein an air outlet 12 is arranged through the housing, and further includes a baffle wall 11 arranged in the housing, wherein one side of the baffle wall is used to install a wiring frame, and the other side is arranged opposite to an air outlet groove 21 at the back of the arc-extinguishing chamber; an arc guide plate 3, wherein the arc guide plate is arranged between the baffle wall and the arc-extinguishing chamber, and the arc guide plate is used to guide the gas reflected back by the baffle wall to the air outlet. The gas in the arc-extinguishing chamber is reflected from the air outlet groove at the back of the arc-extinguishing chamber by the baffle wall. Due to the guidance of the arc guide plate, this part of the gas can be guided out of the housing. On the other hand, the back of the arc guide plate is also a smooth arc (which can be parallel to the front), and the gas in the arc-extinguishing chamber received by the back of the arc guide plate will also reach the air outlet channel with the guidance of the back.

[0022] In this embodiment, as shown in the figure, an air outlet channel 13 is formed between the baffle wall and the inner wall of the bottom of the housing, one end of the arc guide plate is arranged opposite to the baffle wall, and the other end extends toward the air outlet channel. The surface of the arc guide plate is a smooth arc surface, which is conducive to arc guiding.

[0023] In this embodiment, as shown in the figure, there is a gap between the bottom of the arc guide plate and the bottom inner wall of the shell.

[0024] In this embodiment, as shown in the figure, the arc guide plate is an arc-shaped plate structure.

[0025] In this embodiment, as shown in the figure, the inner walls on both sides of the shell are provided with the arc guide plates, so as to better realize the gas guide structure.

[0026] In this embodiment, as shown in the figure, an upper guide plate 4 is also included, one end of which is close to the baffle wall and the other end extends toward the top end surface of the arc guide plate. The upper guide plate is also an arc-shaped structure, which can better guide the airflow to the arc guide plate.

[0027] In this embodiment, as shown in the figure, an empty slot 33 is provided between the upper guide plate and the arc guide plate. It is not closed and will not affect the discharge.

[0028] In this embodiment, as shown in the figure, the shell includes a middle shell 101, a front shell 102 and a rear shell 103, the action mechanism is installed between the middle shell and the front shell, the reclosing mechanism is installed between the middle shell and the rear shell, the middle shell and the front shell are installed together by rivets 104, and the middle shell and the rear shell are connected by screws. The middle shell and the front shell are riveted and cannot be opened, mainly because the middle shell and the front shell are debugged (such as bimetallic lamps) and cannot be opened easily, otherwise there is no guarantee that the middle shell and the rear shell can be opened and the user can operate.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A circuit breaker with an arc-recoil protection structure, comprising a housing (1), an actuating mechanism and an arc-extinguishing mechanism being arranged in the housing, the arc-extinguishing mechanism comprising an arc-extinguishing chamber (2), an air outlet (12) being arranged through the housing, and characterized in that: Also includes A retaining wall (11) is arranged in the housing, one side of the retaining wall is used to install the wiring frame, and the other side of the retaining wall is arranged opposite to the gas outlet groove (21) at the back of the arc extinguishing chamber; An arc guide plate (3), the arc guide plate being arranged between the baffle wall and the arc extinguishing chamber, the arc guide plate being used to guide the gas reflected back by the baffle wall to the gas outlet.

2. The circuit breaker with arc-recoil protection structure according to claim 1, characterized in that: An air outlet channel (13) is formed between the baffle wall and the inner wall of the bottom of the shell, and one end of the arc guide plate is arranged opposite to the baffle wall, and the other end extends towards the air outlet channel.

3. The circuit breaker with arc-recoil protection structure according to claim 1, characterized in that: There is a gap between the bottom of the arc guide plate and the bottom inner wall of the shell.

4. The circuit breaker with arc-recoil protection structure according to claim 1, characterized in that: The arc guide plate is an arc-shaped plate structure.

5. The circuit breaker with arc-recoil protection structure according to claim 1, characterized in that: The arc guide plates are provided on both inner walls of the shell.

6. A circuit breaker with an arc-recoil protection structure according to any one of claims 1 to 5, characterized in that: It also comprises an upper guide plate (4), one end of which is close to the retaining wall and the other end of which extends towards the top end surface of the arc guide plate.

7. The circuit breaker with arc-recoil protection structure according to claim 6, characterized in that: An empty groove (33) is provided between the upper guide plate and the arc guide plate.

8. The circuit breaker with arc-recoil protection structure according to claim 1, characterized in that: The housing comprises a middle housing (101), a front housing (102) and a rear housing (103); the action mechanism is installed between the middle housing and the front housing; a reclosing mechanism is installed between the middle housing and the rear housing; the middle housing and the front housing are installed together via rivets (104); and the middle housing and the rear housing are connected via screws.

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