A frame circuit breaker

Abstract

The present invention relates to a frame circuit breaker, comprising a base, a moving busbar and a static busbar arranged on the base, and a moving contact assembly movably arranged in the base, wherein the static busbar and the moving busbar are roughly arranged opposite to each other in an upper and lower direction, and further comprising an arc extinguishing chamber assembly, wherein the arc extinguishing chamber assembly is installed in the base and roughly extends up and down, and the moving contact assembly is relatively arranged on one side of the arc extinguishing chamber assembly, wherein the moving busbar and the static busbar are respectively arranged at the upper and lower ends of the arc extinguishing chamber assembly, and the moving busbar and the static busbar are separated by the arc extinguishing chamber assembly to fully utilize the height dimension of the base, increase the arc running distance, and increase the number of arc extinguishing grids. At the same time, the arc extinguishing chamber assembly extending up and down and having a height separates the static busbar and the moving busbar, thereby improving the heat dissipation capacity, reducing the current proximity effect, improving the effective current carrying capacity of the busbar, and avoiding heat accumulation between the busbars that are prone to heat.

Description

Technical Field

[0001] The present invention relates to a circuit breaker, and more particularly to a frame circuit breaker with improved space layout. Background Art

[0002] A frame circuit breaker generally includes a base, an operating mechanism, an arc extinguishing chamber, a moving contact assembly, and moving and static busbars. In a conventional structure, the moving contact assembly is generally located in the middle, the operating mechanism and the moving and static busbars are respectively arranged on both sides of the moving contact assembly, and the arc extinguishing chamber is arranged above the moving contact assembly. However, since the arc extinguishing chamber is installed on the upper part of the moving contact assembly (usually arranged horizontally), it is limited by the depth direction of the frame circuit breaker, resulting in a relatively small number of arc extinguishing chamber grids and a short arc running distance, resulting in a relatively low arc extinguishing capacity at high rated voltages. At the same time, since the arc extinguishing chamber is set at a high position, it occupies the entire upper space of the frame circuit breaker, and the spacing between the moving and static busbars has to be set relatively small. Since the moving and static busbars are conductive bodies and are prone to heat, if the moving and static busbars are too close, the heat dissipation performance of the frame circuit breaker will be affected, resulting in excessive temperature rise of the frame circuit breaker. Conventional means of improving heat dissipation capacity, such as increasing the cross-sectional area of the moving and static busbars, will increase copper consumption, leading to increased costs. In addition, the internal structure of conventional frame circuit breakers is sealed, which affects air circulation and makes it difficult to dissipate heat. Summary of the Invention

[0003] Therefore, in order to solve the above problems, the present invention proposes a frame circuit breaker with optimized structure.

[0004] The present invention is implemented by the following technical solutions:

[0005] The present invention proposes a frame circuit breaker, comprising a base, a moving busbar and a stationary busbar arranged on the base, and a moving contact assembly movably arranged in the base, wherein the stationary busbar and the moving busbar are arranged roughly opposite to each other in an up-and-down manner. The circuit breaker also comprises an arc extinguishing chamber assembly, which is installed in the base and extends roughly in an up-and-down manner, and the moving contact assembly is arranged relatively on one side of the arc extinguishing chamber assembly.

[0006] Among them, in order to separate the dynamic busbar and the static busbar to avoid heat accumulation between the busbars and affect heat dissipation, and at the same time to reduce the current proximity effect and improve the effective current carrying capacity of the busbar, in one embodiment, the dynamic busbar and the static busbar are respectively arranged at the upper and lower ends of the arc extinguishing chamber assembly, and the arc extinguishing chamber assembly separates the lead-out ends of the dynamic busbar and the static busbar.

[0007] In order to achieve the best arc extinguishing effect and make the internal structure of the frame circuit breaker compact and reasonable, in one embodiment, the frame circuit breaker also includes a static contact, and the relative movement of the moving contact assembly and the static contact constructs a motion trajectory for achieving conduction or disconnection, and the motion trajectory is between the static busbar and the moving busbar.

[0008] In order to utilize the gravity of the moving contact assembly itself to assist the disconnection of the moving and static contacts, in one embodiment, the moving contact assembly is pivotally connected to the base and can swing up and down roughly along the extension direction of the arc extinguishing chamber assembly.

[0009] Among them, based on installation considerations, in one embodiment, it also includes an operating mechanism, which is installed outside the base and is linked to the moving contact assembly by means of a connecting rod mechanism; the moving contact assembly is arranged in the middle, and the operating mechanism and the arc extinguishing chamber assembly are respectively arranged on both sides of the moving contact assembly.

[0010] In order to improve the heat dissipation effect, in one embodiment, the base further has a heat dissipation channel, and the heat dissipation channel passes through the base substantially from bottom to top.

[0011] In order to remove heat from the conductive circuit that is prone to heat generation, in one embodiment, the heat dissipation channel passes through the extension path of the moving busbar and passes through the swinging activity area of the moving contact assembly.

[0012] Among them, in order to take away the heat of the conductive circuit that is prone to heat, based on installation and manufacturing considerations, in one embodiment, the heat dissipation channel extends roughly along the extension path of the moving busbar, and a diverter is also provided in the base. The diverter is used to divert the airflow flowing through the extension path of the moving busbar to the active area of the moving contact assembly.

[0013] In order to simplify the structural design, in one embodiment, the diverter is disposed below the movable contact assembly and is also provided with a stopper to limit the swing stroke of the movable contact assembly. Preferably, the diverter is a structure with a pointed cone at the lower end.

[0014] Among them, based on installation considerations, in order to form a more coherent heat dissipation channel, in one embodiment, the moving busbar and the static busbar extend from the outside of the base to the peripheral side of the moving contact assembly inside the base, and the static busbar, the moving busbar and the arc extinguishing chamber assembly are roughly concentrated on one side inside the base, so that there is free space on the peripheral side of the moving contact assembly on the side opposite to the arc extinguishing chamber assembly to form a linear and coherent heat dissipation channel.

[0015] The present invention has the following beneficial effects: the present invention arranges the arc extinguishing chamber assembly in the circuit breaker base and extends it up and down along the height direction of the base to fully utilize the height dimension of the base, increase the arc running distance, increase the number of arc extinguishing grids, and improve the arc extinguishing ability of the product at high voltage. At the same time, the arc extinguishing chamber assembly extending up and down with a height separates the static busbar and the dynamic busbar, thereby improving the heat dissipation capacity and avoiding heat accumulation between the busbars that are prone to heat. In addition, the moving contact assembly is arranged to swing up and down, and the gravity of the moving contact assembly itself can be used as a driving force to assist the frame circuit breaker in opening, thereby increasing the opening speed and further improving the breaking performance. At the same time, a heat dissipation channel is also provided. The heat dissipation channel passes through the dynamic busbar and flows through the moving contact assembly. By utilizing the air convection capacity, the heat dissipation channel can discharge the heat generated by the conductive circuit, thereby improving the heating of the frame circuit breaker and reducing the temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a frame circuit breaker in an embodiment;

[0017] Figure 2 is a schematic diagram of an outer shell of a frame circuit breaker in an embodiment;

[0018] Figure 3 is a schematic diagram of a frame circuit breaker (including an operating mechanism) in an embodiment;

[0019] Figure 4 1 is a schematic diagram of a heat dissipation channel in an embodiment (part 1);

[0020] Figure 5 2 is a schematic diagram of the heat dissipation channel in the embodiment;

[0021] Figure 6 Schematic diagram of the heat dissipation channel in the embodiment (part 3). DETAILED DESCRIPTION

[0022] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0024] See Figure 1As shown, this embodiment provides a frame circuit breaker, comprising a base 1, a moving contact assembly 2, a static busbar 3, a moving busbar 4 and an arc extinguishing chamber assembly 5, wherein two bases 1 are joined together to form an outer shell 200 of the frame circuit breaker (see Figure 2 ), in this embodiment, the frame circuit breaker is installed and used, that is, Figure 1 The static orientation of the state shown is the direction of this embodiment, and the moving contact assembly 2, the static busbar 3, the moving busbar 4 and the arc extinguishing chamber assembly 5 are arranged in the outer shell 200, and the static busbar 3 and the moving busbar 4 are roughly arranged relative to each other up and down, and the moving contact assembly 2 is relatively arranged on one side of the arc extinguishing chamber assembly 5, wherein the static busbar 3 is relatively located above the moving busbar 4, and the moving contact assembly 2 is relatively located on the left side of the arc extinguishing chamber assembly 5, then the moving contact assembly 2 and the arc extinguishing chamber assembly 5 are roughly arranged left and right, and the arc extinguishing chamber assembly 5 extends up and down along the height direction of the base 1 to make full use of the height dimension of the base, increase the arc running distance, increase the number of arc extinguishing grids, and improve the arc extinguishing ability of the product at high voltage. The static busbar 3 and the moving busbar 4 are respectively arranged at the upper and lower ends of the arc extinguishing chamber assembly 5, and are led out of the outer shell 200 to become the two terminal blocks of the frame circuit breaker, formed by the upper and lower The arc extinguishing chamber assembly 5 extending in height separates the lead-out ends of the static busbar 3 and the dynamic busbar 4, thereby improving the heat dissipation capacity and preventing heat from accumulating between the busbars that are prone to heat. The dynamic busbar 4 is electrically connected to the dynamic contact assembly 2. The static busbar 3 first extends horizontally and then vertically, thereby roughly forming an L shape. The end of the vertical extension section of the static busbar 3 has a static contact 31, and correspondingly, there is a dynamic contact 21 on the dynamic contact assembly 2. The dynamic contact assembly 2 is arranged between the static busbar 3 and the dynamic busbar 4, and the dynamic contact assembly 2 is integrally pivoted to the base 1, so that the dynamic contact 21 can swing up and down to approach or away from the static contact 31 to control the conduction and disconnection of the frame circuit breaker. The way in which the dynamic contact assembly 2 swings up and down can also use the gravity of the dynamic contact assembly 2 itself as a driving force to assist the opening of the frame circuit breaker, thereby increasing the opening speed and further improving the breaking performance. The frame circuit breaker also includes an operating mechanism 6, see Figure 3 The operating mechanism 6 is located to the left of the moving contact assembly 2. It is mounted outside the outer housing 200 and is linked to the moving contact 21 via a linkage mechanism, driving the movement of the contact 21 to help open and close the circuit breaker. The placement of the operating mechanism 6 is a conventional option and will not be described in detail in this example. In terms of overall layout, the frame circuit breaker has the moving contact assembly 2 positioned in the center, with the operating mechanism 6 and the arc extinguishing chamber assembly 5 positioned on the left and right sides of the moving contact assembly 2, respectively. This effectively utilizes the frame circuit breaker's installation space.

[0025] See Figure 4-6In this embodiment, a heat dissipation channel 15 is further provided on the base 1. The heat dissipation channel 15 is formed in the base 1. It first extends from the bottom of the base 1 along the extension path of the moving busbar 4, and then extends upward to the top of the base 1 at a position close to the left side of the moving contact assembly 2, thereby forming a roughly chimney-shaped channel from bottom to top, thereby accelerating the air convection speed. Since the static busbar 3, the moving busbar 4 and the arc extinguishing chamber assembly 5 are roughly concentrated on the right side inside the base 1, there is relatively ample space around the moving contact assembly 2 and on its left side, thereby forming a relatively linear and coherent heat dissipation channel 15. A block 16 for stopping the moving contact assembly 2 is also provided in the base 1. The block 16 is used to limit the swing stroke of the moving contact assembly 2, and the lower end of the block 16 is in a pointed cone shape, thereby forming a diversion structure for diverting the airflow passing through the extension path of the moving busbar 4 to the active area of the moving contact assembly 2, so that the heat dissipation channel 15 passes through the moving busbar 4 and flows through the active area of the moving contact assembly 2. By utilizing the air convection capacity, the heat dissipation channel 15 can discharge the heat generated by the conductive circuit, thereby improving the heating of the frame circuit breaker and reducing the temperature rise.

[0026] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the scope of protection of the present invention.

Claims

1. A frame circuit breaker, comprising a base, a moving busbar and a stationary busbar disposed on the base, and a moving contact assembly movably disposed in the base, wherein the stationary busbar and the moving busbar are substantially disposed in an upper and lower direction relative to each other, and characterized in that: It also includes an arc extinguishing chamber assembly, which is installed in the base and extends roughly up and down. The moving contact assembly is relatively arranged on one side of the arc extinguishing chamber assembly. The moving busbar and the static busbar are respectively arranged at the upper and lower ends of the arc extinguishing chamber assembly, and the arc extinguishing chamber assembly separates the lead ends of the moving busbar and the static busbar.

2. The frame circuit breaker according to claim 1, characterized in that: It also includes a static contact, and the relative movement between the dynamic contact assembly and the static contact constructs a motion trajectory for achieving conduction or disconnection, and the motion trajectory is located between the static busbar and the dynamic busbar.

3. The frame circuit breaker according to claim 1, characterized in that: The moving contact assembly is pivotally connected to the base and can swing up and down substantially along the extension direction of the arc extinguishing chamber assembly.

4. The frame circuit breaker according to claim 1, characterized in that: It also includes an operating mechanism, which is installed outside the base and is linked to the moving contact assembly by a connecting rod mechanism; the moving contact assembly is arranged in the middle, and the operating mechanism and the arc extinguishing chamber assembly are respectively arranged on both sides of the moving contact assembly.

5. The frame circuit breaker according to claim 1, characterized in that: The base is also provided with a heat dissipation channel, which passes through the base substantially from bottom to top.

6. The frame circuit breaker according to claim 5, characterized in that: The heat dissipation channel passes through the extension path of the moving busbar and passes through the active area of the moving contact assembly.

7. The frame circuit breaker according to claim 6, characterized in that: The heat dissipation channel extends substantially along the extension path of the moving busbar. A diverter is further provided in the base, and the diverter is used to divert the airflow flowing through the extension path of the moving busbar to the active area of the moving contact assembly.

8. The frame circuit breaker according to claim 7, characterized in that: The diverter is arranged at a position below the moving contact assembly. The diverter is also stopped to limit the swing stroke of the moving contact assembly. The diverter is a structure with a pointed cone at the lower end.

9. The frame circuit breaker according to claim 5, characterized in that: The moving busbars and the static busbars extend from the outside of the base to the peripheral side of the moving contact assembly inside the base. The static busbars, the moving busbars and the arc extinguishing chamber assembly are roughly concentrated on one side inside the base, so that there is free space on the peripheral side of the moving contact assembly on the side opposite to the arc extinguishing chamber assembly to form a linear and coherent heat dissipation channel.

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