A modular circuit breaker terminal cover assembly

Abstract

The utility model discloses a modularized circuit breaker terminal cover assembly, characterized in that: it includes a independent and one pole of circuit breaker matched terminal cover body, the terminal cover body inside has at least one arc extinguishing chamber, at least two front and rear parallel arc separation board installation slot of arranging in the arc extinguishing chamber, arc separation board is installed in the front and rear parallel arc separation board installation slot and divides into several chambers to form arc extinguishing chamber, the cover plate is installed on the opening face of terminal cover body, and the opening face of terminal cover body is closed. The terminal cover assembly is a modularized ionization elimination unit, when being used for multipole circuit breaker, can freely select whether each pole is assembled terminal cover, and the installation mode is simple, flexible, and the installation strength and sealing performance of terminal cover are enhanced, and the adverse consequences of phase-to-phase breakdown and zero flying arc failure are further avoided.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a modular circuit breaker terminal cover assembly. Background Technology

[0002] When molded case circuit breakers are subjected to large short-circuit currents, they are prone to phase-to-phase short circuits at external wiring points or short circuits between adjacent products, which can cause damage to the distribution box or injury to operators. Therefore, in order to avoid phase-to-phase short circuits at external wiring points or short circuits between adjacent products when molded case circuit breakers are subjected to large short-circuit currents, resulting in damage to the distribution box, existing molded case circuit breakers have terminal covers installed at the circuit breaker terminals.

[0003] Currently, most existing terminal covers in the industry, when containing multiple anti-ionization units, are integrally molded structures. These require the design of mounting features on the terminal cover to mate with the circuit breaker's multi-pole configuration for secure installation. With the development of power distribution technology, the breaking capacity of circuit breakers is constantly increasing, and the breaking energy is also growing. The mounting features of the terminal cover are prone to breakage during the breaking process due to insufficient strength, leading to the terminal cover being blown away by the high-speed airflow generated during the break, causing adverse effects such as phase-to-phase breakdown. On the other hand, because the arc-blocking plate is inserted into the slots inside the terminal cover in layers, the terminal cover is not sealed in the insertion direction. Therefore, arcing can also occur in this direction, leading to adverse consequences such as phase-to-phase breakdown and zero-arc failure. Utility Model Content

[0004] The purpose of this utility model is to address the defects of the existing circuit breaker terminal covers by providing a modular circuit breaker terminal cover assembly. This terminal cover assembly is a modular anti-ionization unit. When used in multi-pole circuit breakers, it allows for the free selection of whether or not to equip each pole with a terminal cover. The installation method is simple and flexible, and it enhances the installation strength and sealing performance of the terminal cover, further avoiding the adverse consequences of phase-to-phase breakdown and zero-arc failure.

[0005] Technical solution

[0006] To achieve the above technical objectives, this utility model provides a modular circuit breaker terminal cover assembly, which includes an independent terminal cover body that matches one pole of the circuit breaker. The terminal cover body has at least one arc-extinguishing chamber inside, and at least two arc-isolating plate mounting slots arranged in parallel front and rear are provided in the arc-extinguishing chamber. The arc-isolating plates are installed in the parallel arc-isolating plate mounting slots to divide the arc-extinguishing chamber into several chambers. The front end face and / or rear end face of the circuit breaker housing has terminal cover mounting slots, and the terminal cover body is inserted into the end face of the circuit breaker housing from the back to the front.

[0007] Preferably, the cover plate is installed on the opening surface of the terminal cover body perpendicular to the insertion direction of the arc-blocking plate, and closes the end of the terminal cover body near the back of the circuit breaker.

[0008] Preferably, at least one protruding pin is provided on the front side of the terminal cover body, and the at least one protruding pin is inserted into the terminal cover mounting groove on the front end face and / or rear end face of the circuit breaker housing. One end of the at least one protruding pin is stopped by the top limiting surface of the terminal cover mounting groove, and the other end is interference-fitted with the terminal cover mounting groove.

[0009] Preferably, the upper end of the cover plate is inserted into a slot inside the inner cavity of the terminal cover body, and mounting protrusions are provided on both sides of the lower end of the cover plate. The mounting protrusions are pressed into the corresponding small slots on the left and right sides of the terminal cover body.

[0010] Preferably, the circuit breaker housing includes a base and a cover, and the terminal cover mounting groove is located on the end face of the base.

[0011] Preferably, a plurality of protrusions are provided on the inner wall of the arc-extinguishing chamber inside the terminal cover body at a position outside the plurality of chambers. The plurality of protrusions and the outer wall of the arc-blocking plate mounting groove form a mounting groove for placing the arc-extinguishing grid or the arc-blocking plate.

[0012] Preferably, the upper end of the cover plate is inserted into a slot inside the inner cavity of the terminal cover body, and mounting protrusions are provided on both sides of the lower end of the cover plate. The mounting protrusions are pressed into corresponding buckles on the left and right sides of the terminal cover body.

[0013] Preferably, the cover plate is connected to the opening surface of the terminal cover body by fasteners.

[0014] Preferably, the upper end of the cover plate is inserted into a slot inside the opening surface of the terminal cover body, and the cover plate is connected to the opening surface of the terminal cover body by fasteners.

[0015] Preferably, the terminal cover body is independent and matches one pole of the circuit breaker, and can be installed on each pole of a multi-pole circuit breaker. There is a gap between adjacent terminal cover bodies, and spacers are inserted between the poles of the circuit breaker housing.

[0016] Beneficial effects

[0017] This utility model provides a modular circuit breaker terminal cover assembly, which includes an independent terminal cover body that matches one pole of the circuit breaker. The terminal cover body contains at least one arc-extinguishing chamber, and each arc-extinguishing chamber has at least two parallel arc-isolating plate mounting slots. The arc-isolating plates are installed in these slots, dividing the arc-extinguishing chamber into several compartments. A cover plate is installed on the opening surface of the terminal cover body, sealing the opening. This terminal cover assembly is a modular anti-ionization unit. When used in multi-pole circuit breakers, it allows for flexible selection of whether or not a terminal cover is installed on each pole. The installation method is simple and flexible, and it enhances the installation strength and sealing performance of the terminal cover, further avoiding the adverse consequences of phase-to-phase breakdown and zero-arc failure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Appendix Figure 1 This is a schematic diagram of the terminal cover assembly structure in Embodiment 1 of this utility model;

[0020] Appendix Figure 2 This is a schematic diagram of the assembly of the terminal cover and the arc-blocking plate in Embodiment 1 of this utility model;

[0021] Appendix Figure 3 This is a schematic diagram of the terminal cover structure in Embodiment 1 of this utility model;

[0022] Appendix Figure 4 This is a schematic diagram of the cover plate structure in Embodiment 1 of this utility model;

[0023] Appendix Figure 5 This is a schematic diagram of the assembly of the terminal cover and the cover plate in Embodiment 1 of this utility model;

[0024] Appendix Figure 6 This is a schematic diagram of the assembly of the terminal cover and phase spacer with the circuit breaker housing in Embodiment 1 of this utility model;

[0025] Appendix Figure 7 This is a schematic diagram of the circuit breaker housing structure according to Embodiment 1 of this utility model;

[0026] Appendix Figure 8 This is a schematic diagram of the terminal cover and cover plate fitting together in Embodiment 2 of this utility model;

[0027] Appendix Figure 9 This is a schematic diagram of the terminal cover and cover plate fitting together in Embodiment 3 of this utility model;

[0028] Appendix Figure 10 It is attached Figure 6 Corresponding exploded view;

[0029] Appendix Figure 11a This is a structural diagram of a metal wire mesh arc-damping plate;

[0030] Appendix Figure 11b This is a structural diagram of a perforated metal arc-blocking plate;

[0031] Appendix Figure 12 This is another schematic diagram of the terminal cover structure of this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0037] Example 1

[0038] As attached Figure 1 , 2 As shown in Figure 12, a modular circuit breaker terminal cover assembly includes a separate terminal cover body 1 that matches one pole of the circuit breaker. The terminal cover body 1 contains at least one arc-extinguishing chamber 2. At least two arc-damping plate mounting slots 3 are arranged side-by-side in the arc-extinguishing chamber 2. Arc-damping plates 4 are installed in the side-by-side arc-damping plate mounting slots 3, dividing the arc-extinguishing chamber 2 into several chambers 5. The ends of the outer side walls 31 of the mounting slots 3 form openings 1a. A cover plate 6 is installed on the opening 1a at the bottom of the terminal cover body 1, closing the opening 1a of the terminal cover body 1. Preferably, as shown in the attached figure... Figure 4 The cover plate 6 shown is installed on the opening surface 1a of the terminal cover body 1, which is perpendicular to the insertion direction of the arc-blocking plate 4, as shown in the attached figure. Figure 5 As shown. Cover plate 6 closes the end of terminal cover body 1 near the back of the circuit breaker.

[0039] To be detailed, as shown in the attached document. Figure 3 As shown, at least one protruding pin 7 is provided on the front side of the terminal cover body 1, as illustrated in the attached figure. Figure 6 and attached Figure 10 As shown, the at least one protruding pin 7 is inserted from the back of the circuit breaker into the terminal cover mounting groove 9 on the front and / or rear face of the circuit breaker housing 8, as illustrated in the attached diagram. Figure 7 As shown, the end of the at least one protruding pin 7 away from the cover plate 6 is stopped by the top limiting surface 10 of the terminal cover mounting groove 9, and the other end of the pin 7 near the cover plate 6 is interference-fitted with the terminal cover mounting groove 9. Further, the circuit breaker housing 8 includes a base 81 and a cover 82, with the mounting groove 9 located on the end face of the base 81. For example, the mounting groove 9 may have the same width vertically, and the lower end of the pin 7 may be slightly wider than the mounting groove 9. During installation, the terminal cover body 1 is inserted from the back of the circuit breaker towards the front, with the pin 7 interference-fitted with the lower end of the mounting groove 9, and the end of the pin 7 away from the cover plate 6 being stopped by the top limiting surface 10 of the terminal cover mounting groove 9.

[0040] As attached Figure 5 and attached Figure 8As shown, the upper end 61 of the cover plate 6 is inserted into the slot 11 inside the cavity of the terminal cover body 1, and the lower end 62 of the cover plate 6 is provided with mounting protrusions 12 on both sides. The mounting protrusions 12 are pressed into the corresponding small slots 13 on the left and right sides of the terminal cover body 1. During installation, the surface of the cover plate 6 abuts against the opening surface 1a of the terminal cover body 1.

[0041] Furthermore, as shown in the attached document. Figure 3 and Figure 12 As shown, several protrusions 14 are provided on the inner wall of the arc-extinguishing chamber 2 inside the terminal cover body 1, near the back of the terminal cover body 1. The height of the protrusions 14 can be the same as or lower than the height of the outer wall of the arc-extinguishing plate mounting groove 3, which facilitates mold making. The several protrusions 14 and the outer wall of the arc-extinguishing plate mounting groove 3 form a mounting groove 15 for placing the arc-extinguishing grid or arc-extinguishing plate 4. The arc-extinguishing plate 4 can be a perforated metal plate or a wire mesh plate. The arc-extinguishing plate 4 can be made of only one material or two materials can be used simultaneously and inserted into the slot inside the terminal cover. Protrusions 41 can be provided on both sides of the arc-extinguishing plate, and the arc-extinguishing plate 4 is secured in the slot by the protrusions 41, making the installation more stable.

[0042] Figure 11a This is a structural diagram of a metal wire mesh arc-damping plate. Protrusions 41 are provided on both sides of the arc-damping plate, allowing it to be securely fitted into slots via these protrusions 41, resulting in a more stable installation.

[0043] The arc-blocking plate 4 can be a metal wire mesh plate with protrusions on both sides, or it can be like... Figure 11a The arc-blocking plate 4 is composed of two metal wire mesh panels. After the two metal wire mesh panels are bonded together, they are flattened and pressed into a single piece. Then, protrusions are set on both sides of the arc-blocking plate 4. The arc-blocking plate 4 is composed of two metal wire mesh panels, which increases the thickness of the arc-blocking plate 4 and enhances the arc-blocking effect.

[0044] Figure 11b This is a structural diagram of a perforated metal arc-damping plate. Protrusions 41 with opposite upward directions are provided on both sides of the arc-damping plate. The arc-damping plate 4 is secured in the slot via these protrusions, resulting in a more stable installation.

[0045] The terminal cover body 1 is independent. The terminal cover body 1, which is matched with one pole of the circuit breaker, can be installed on each pole of the multi-pole circuit breaker. There is a gap between adjacent terminal cover bodies 1, and the phase spacer 18 is inserted between each pole of the circuit breaker housing 8.

[0046] Example 2

[0047] As attached Figure 8As shown, in this embodiment, the upper end 61 of the cover plate 6 is inserted into the slot 11 inside the inner cavity of the terminal cover body 1, and the lower end 62 of the cover plate 6 is provided with mounting protrusions 12 on both sides. The mounting protrusions 12 are pressed into the corresponding buckles 16 on the left and right sides of the terminal cover body 1.

[0048] Example 3

[0049] As attached Figure 9 As shown, in this embodiment, the upper end of the cover plate 6 is inserted into the slot 11 inside the cavity of the terminal cover body 1. The cover plate 6 is connected to the terminal cover body 1 by fasteners 17, for example, the cover plate 6 is connected to the opening surface 1a of the terminal cover body 1 by fasteners 17.

[0050] Example 4

[0051] In this embodiment, during installation, the surface of the cover plate 6 abuts against the opening surface 1a of the terminal cover body 1. The cover plate 6 is connected to the terminal cover body 1 by fasteners 17, for example, the cover plate 6 is connected to the opening surface 1a of the terminal cover body 1 by fasteners 17.

[0052] This utility model provides a modular circuit breaker terminal cover assembly, which is a modular anti-ionization unit. When used in multi-pole circuit breakers, it allows for the free selection of whether or not to equip each pole with a terminal cover. The installation method is simple and flexible, and it enhances the installation strength and sealing performance of the terminal cover, further avoiding the adverse consequences of phase-to-phase breakdown and zero-arc failure.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A modular circuit breaker terminal cover assembly, characterized in that: It includes a separate terminal cover body (1) that matches one pole of the circuit breaker. The terminal cover body (1) has at least one arc-extinguishing chamber (2) inside. The arc-extinguishing chamber (2) is provided with at least two arc-blocking plate mounting slots (3) arranged in parallel. The arc-blocking plate (4) is installed in the arc-blocking plate mounting slots (3) arranged in parallel to divide the arc-extinguishing chamber (2) into several chambers (5). The front and / or rear faces of the circuit breaker housing (8) have terminal cover mounting slots (9). The terminal cover body (1) is inserted into the end face of the circuit breaker housing (8) from the back to the front.

2. The modular circuit breaker terminal cover assembly as described in claim 1, characterized in that: The cover plate (6) is installed on the opening surface (1a) of the terminal cover body (1) perpendicular to the insertion direction of the arc-blocking plate (4), and closes the end of the terminal cover body (1) near the back of the circuit breaker.

3. A modular circuit breaker terminal cover assembly as described in claim 1, characterized in that: At least one protruding pin (7) is provided on the front side of the terminal cover body (1). The at least one protruding pin (7) is inserted into the terminal cover mounting groove (9) on the front and / or rear face of the circuit breaker housing (8). One end of the at least one protruding pin (7) is stopped by the top limiting surface (10) of the terminal cover mounting groove (9), and the other end is interference-fitted with the terminal cover mounting groove (9).

4. A modular circuit breaker terminal cover assembly as described in claim 1, characterized in that: The upper end (61) of the cover plate (6) is inserted into the slot (11) inside the cavity of the terminal cover body (1), and the lower end (62) of the cover plate (6) is provided with mounting protrusions (12) on both sides. The mounting protrusions (12) are pressed into the corresponding small slots (13) on the left and right sides of the terminal cover body (1).

5. A modular circuit breaker terminal cover assembly as described in claim 1, characterized in that: The circuit breaker housing (8) includes a base (81) and a cover (82), and the terminal cover mounting groove (9) is located on the end face of the base (81).

6. A modular circuit breaker terminal cover assembly as described in claim 1, characterized in that: The inner wall of the arc-extinguishing chamber (2) inside the terminal cover body (1) is provided with several protrusions (14) located outside the several chambers (5). The several protrusions (14) and the outer wall of the arc-blocking plate mounting groove (3) form a mounting groove (15) for placing the arc-extinguishing grid or the arc-blocking plate (4).

7. A modular circuit breaker terminal cover assembly as described in claim 2, characterized in that: The upper end (61) of the cover plate (6) is inserted into the slot (11) inside the cavity of the terminal cover body (1), and the lower end (62) of the cover plate (6) is provided with mounting protrusions (12) on both sides. The mounting protrusions (12) are pressed into the corresponding buckles (16) on the left and right sides of the terminal cover body (1).

8. A modular circuit breaker terminal cover assembly as described in claim 2, characterized in that: The cover plate (6) is connected to the opening surface (1a) of the terminal cover body (1) by fasteners (17).

9. A modular circuit breaker terminal cover assembly as described in claim 2, characterized in that: The upper end of the cover plate (6) is inserted into the slot (11) inside the opening surface (1a) of the terminal cover body (1), and the cover plate (6) is connected to the opening surface (1a) of the terminal cover body (1) by fasteners (17).

10. A modular circuit breaker terminal cover assembly as described in claim 1, characterized in that: The terminal cover body (1) is independent and matches one pole of the circuit breaker. It can be installed on each pole of a multi-pole circuit breaker. There is a gap between adjacent terminal cover bodies (1), and a spacer plate (18) is inserted between each pole of the circuit breaker housing (8).

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