A circuit breaker contact system connection device

Abstract

This utility model provides a circuit breaker contact system connection device, including a moving contact, a stationary contact that cooperates with the moving contact, a U-shaped insert, a bridge-type contact, a drawer seat U-shaped insert, and a drawer seat busbar; through the linkage design of the double heat dissipation grooves of the U-shaped insert and the drawer seat U-shaped insert, combined with the rectangular wave-shaped cross-section structure of busbar one and busbar two, a three-dimensional heat dissipation path is formed: the wave-shaped busbar increases the effective heat dissipation area, and with the guiding effect of the trapezoidal cross-section heat dissipation groove, the efficiency of natural air convection is improved.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a circuit breaker contact system connection device. Background Technology

[0002] As a core protection device in the power distribution system, the frame circuit breaker undertakes the protection functions of circuit overload, short circuit, ground fault and other conditions. Its performance directly affects the reliability and stability of the power system.

[0003] When existing intelligent frame circuit breakers are upgraded to a fixed current frame, they generally face the technical bottleneck of excessive temperature rise. Specifically, this manifests as: insufficient heat dissipation design under space constraints: the electronic components of the intelligent circuit breaker occupy the heat dissipation channels inside the cabinet, and the traditional "natural convection + top fan" heat dissipation method cannot effectively remove the heat generated by the contacts and busbars. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a circuit breaker contact system connection device that can increase the rated current and improve temperature rise within a limited space.

[0005] This utility model is achieved through the following technical solution:

[0006] A circuit breaker contact system connection device includes a moving contact and a stationary contact cooperating with the moving contact; the circuit breaker contact system connection device also includes a U-shaped insert, a bridge-type contact, a drawer-type U-shaped insert, and a drawer-type busbar; the moving contact is connected to a threaded hole three of the U-shaped insert through a threaded hole one; the stationary contact is connected to the threaded hole three of the U-shaped insert through a threaded hole two; two rows of busbars one are provided on the U-shaped insert; the bridge-type contact is installed on the busbars one of the U-shaped insert; a heat dissipation groove one is provided on the U-shaped insert at a position between the busbars one; two rows of busbars two are provided on the drawer-type U-shaped insert; the bridge-type contact has an opening one and an opening two at both ends, wherein opening one is engaged with the busbar one of the U-shaped insert, and opening two is engaged with the busbar two of the drawer-type U-shaped insert; the drawer-type... A second heat dissipation groove is provided between the two busbars of the U-shaped insert; the U-shaped insert of the drawer seat is connected to the threaded hole five on the busbar of the drawer seat through the threaded hole four; the first and second heat dissipation grooves have a trapezoidal cross-section structure, and the bottom width of the groove is greater than the opening width; the bridge-type contact is made of silver-copper alloy, and the contact surface of its opening one and opening two is plated with a palladium-nickel alloy layer with a thickness of 5-10μm; the cross-section of the first and second busbars is rectangular wavy, and the height of the wave crest is 1 / 3 of the thickness of the first and second busbars; anti-loosening nuts are provided on the threaded holes one, two, and four, and the anti-loosening nuts have the opposite thread direction to the corresponding threaded holes.

[0007] The beneficial effects of this utility model are:

[0008] By linking the U-shaped insert and the drawer-type U-shaped insert with a dual heat dissipation groove design, and combining the rectangular wave-shaped cross-section structure of busbar one and busbar two, a three-dimensional heat dissipation path is formed: the wave-shaped busbar increases the effective heat dissipation area, and with the flow guiding effect of the trapezoidal cross-section heat dissipation groove, the efficiency of natural air convection is improved. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the structure of the moving contact described in this utility model.

[0012] Figure 3 This is a schematic diagram of the structure of the stationary contact described in this utility model.

[0013] Figure 4 This is a schematic diagram of the U-shaped insert described in this utility model.

[0014] Figure 5 This is a schematic diagram of the bridge-type contact described in this utility model.

[0015] Figure 6 This is a schematic diagram of the structure of the drawer seat U-shaped insert knife described in this utility model.

[0016] Figure 7 This is a schematic diagram of the structure of the drawer seat busbar described in this utility model.

[0017] As shown in the figure: 1-Moving contact; 1a-Threaded hole one; 2-Stationary contact; 2a-Threaded hole two; 3-U-shaped insert; 3a-Threaded hole three; 3b-Busbar one; 3c-Heat sink one; 4-Bridge contact; 4a-Opening one; 4b-Opening two; 5-Drawer seat U-shaped insert; 5a-Busbar two; 5b-Threaded hole four; 5c-Heat sink two; 6-Drawer seat busbar; 6a-Threaded hole five. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0021] like Figures 1-7 The circuit breaker contact system connection device shown includes a moving contact 1, a stationary contact 2 that cooperates with the moving contact, a U-shaped insert 3, a bridge-type contact 4, a drawer seat U-shaped insert 5, and a drawer seat busbar 6.

[0022] The moving contact 1 is connected to the threaded hole 3a of the U-shaped insert 3 through the threaded hole 1a.

[0023] The stationary contact 2 is connected to the threaded hole 3a of the U-shaped insert 3 through the threaded hole 2a.

[0024] The U-shaped insert 3 is provided with two rows of busbars 3b, and a heat dissipation groove 3c is provided on the U-shaped insert 3 between the busbars 3b.

[0025] The bridge-type contact 4 is installed on the busbar 3b of the U-shaped insert 3.

[0026] The drawer seat U-shaped insert 5 is provided with two rows of busbars 5a. The bridge-type contact 4 has openings 4a and 4b at both ends, respectively. Opening 4a is connected to busbar 3b of the U-shaped insert 3, and opening 4b is connected to busbar 5a of the drawer seat U-shaped insert 5. A heat dissipation groove 5c is provided between the busbars 5a of the drawer seat U-shaped insert 5. The drawer seat U-shaped insert 5 is connected to the threaded hole 6a on the drawer seat busbar 6 through threaded hole 5b.

[0027] In order to enhance air convection efficiency through the trapezoidal slot design, while avoiding electric field distortion caused by sharp edges of the slot opening, and taking into account both heat dissipation performance and electrical safety, the heat dissipation slot 1 3c and heat dissipation slot 2 5c have trapezoidal cross-section structures, and the width of the slot bottom is greater than the width of the slot opening.

[0028] The bridge-type contact 4 is made of silver-copper alloy. The contact surfaces of its opening 4a and opening 4b are plated with a palladium-nickel alloy layer with a thickness of 5-10μm. The silver-copper alloy substrate ensures conductivity and mechanical strength, while the palladium-nickel alloy plating enhances oxidation resistance and arc erosion resistance, thus extending the life of the contact system.

[0029] The cross-sections of busbar 3b and busbar 5a are rectangular wavy, and the height of the wave crest is 1 / 3 of the thickness of busbar 3b and busbar 5a. The wavy busbars increase the surface area while maintaining the current carrying capacity, and together with the heat sink, they form a composite heat dissipation path, which can effectively reduce the temperature rise.

[0030] Each of the threaded holes 1a, 2a, and 5b is provided with a locking nut, and the locking nut has the opposite thread direction to the corresponding threaded hole.

[0031] The working principle of this utility model is as follows:

[0032] Through the dual heat dissipation groove linkage design of U-shaped insert 3 and drawer seat U-shaped insert 5, combined with the rectangular wave-shaped cross-section structure of busbar 1 3b and busbar 2 5a, a three-dimensional heat dissipation path is formed: the wave-shaped busbar increases the effective heat dissipation area, and with the flow guiding effect of the trapezoidal cross-section heat dissipation groove, the efficiency of natural air convection is improved.

[0033] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A circuit breaker contact system connection device, comprising a moving contact (1) and a stationary contact (2) cooperating with the moving contact, characterized in that: It also includes a U-shaped insert (3), a bridge-type contact (4), a drawer-type U-shaped insert (5), and a drawer-type busbar (6); the moving contact (1) is connected to the threaded hole three (3a) of the U-shaped insert (3) through a threaded hole one (1a); the stationary contact (2) is connected to the threaded hole three (3a) of the U-shaped insert (3) through a threaded hole two (2a); two rows of busbars one (3b) are provided on the U-shaped insert (3); the bridge-type contact (4) is installed on the busbars one (3b) of the U-shaped insert (3); a heat dissipation groove one (3c) is provided on the U-shaped insert (3) between the busbars one (3b); The drawer seat U-shaped insert (5) is provided with two rows of busbars (5a); the bridge contact (4) is provided with opening one (4a) and opening two (4b) at both ends, wherein opening one (4a) is engaged with busbar one (3b) of U-shaped insert (3), and opening two (4b) is engaged with busbar two (5a) of drawer seat U-shaped insert (5); heat dissipation groove two (5c) is provided between busbars two (5a) of drawer seat U-shaped insert (5); the drawer seat U-shaped insert (5) is connected to the threaded hole five (6a) on the drawer seat busbar (6) through threaded hole four (5b).

2. A circuit breaker contact system connecting device according to claim 1, characterized in that: The heat dissipation slot 1 (3c) and heat dissipation slot 2 (5c) have a trapezoidal cross-section structure, and the width of the bottom of the slot is greater than the width of the opening.

3. The circuit breaker contact system connecting device of claim 1, wherein: The bridge-type contact (4) is made of silver-copper alloy, and its contact surfaces of opening one (4a) and opening two (4b) are plated with a palladium-nickel alloy layer with a thickness of 5-10μm.

4. The circuit breaker contact system connecting device of claim 1, wherein: The cross-sections of busbar 1 (3b) and busbar 2 (5a) are rectangular wavy, and the height of the wave crest is 1 / 3 of the thickness of busbar 1 (3b) and busbar 2 (5a).

5. The circuit breaker contact system connecting device of claim 1, wherein: Anti-loosening nuts are provided on threaded hole one (1a), threaded hole two (2a) and threaded hole four (5b), and the anti-loosening nuts are opposite to the thread direction of the corresponding threaded holes.

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