Structure of static contact termination bus and arc extinguishing chamber arranged behind switch and the switch

Abstract

The application relates to a structure of a static contact terminal strip and an arc extinguishing chamber arranged behind a switch and the switch, which comprises a shell, the shell being internally provided with a moving contact and a static contact, the joint and separation of the moving contact and the static contact controlling the on-off of the switch, and the arc generated when the moving contact and the static contact are separated entering the arc extinguishing chamber and being extinguished, characterized in that the static contact terminal strip and at least part of the arc extinguishing chamber are arranged behind the switch. In the case of not increasing the height of the disconnecting switch product, the space occupied by the arc extinguishing chamber can be increased, more arc extinguishing grid plates are arranged, the breaking capacity of the disconnecting switch is improved, and meanwhile, the mounting mode of the disconnecting switch is not changed.

Description

Technical Field

[0001] This invention belongs to the field of switch technology, specifically relating to a structure in which a stationary contact terminal block and an arc-extinguishing chamber are arranged behind a switch, and the switch thereof. Background Technology

[0002] Circuit breakers are a crucial component of electrical distribution equipment, primarily used in industrial low-voltage power systems. They connect and disconnect current in power grid circuits and protect lines and power equipment from faults such as overload, undervoltage, short circuit, and single-phase grounding. The circuit breaker's function of interrupting overload or short-circuit currents is mainly accomplished through the arc-extinguishing chamber installed within it. When a fault current occurs in the circuit, and the current value exceeds the protection range set by the intelligent controller, the operating mechanism is activated, causing the moving and stationary contacts of the circuit breaker to quickly open. At this moment, the voltage between the moving and stationary contacts causes air dielectric discharge, generating a high-temperature electric arc.

[0003] In the current low-voltage electrical appliance field, DC voltage can only reach DC 1500V. According to the latest development plan for low-voltage electrical appliance industry standards, the standard will expand to AC 2000V and DC 3000V. Existing DC 1500V products can no longer meet customer needs and urgently require upgrading.

[0004] Currently, most new frame-type circuit breakers or disconnectors on the market only achieve single-pole DC 750V and two-pole DC 1500V; none of the companies' products can reach DC 2500V. In traditional disconnectors, especially frame-type disconnectors, the arc-extinguishing chamber is typically placed above the moving and stationary contacts. The arc generated by the switch enters the arc-extinguishing chamber and is extinguished after the contacts open. The extinguishing of the arc is directly related to the arc voltage. The arc can only be successfully extinguished when the arc voltage is greater than the power supply voltage.

[0005]

[0006] In the formula, U c ----DC power supply voltage;

[0007] L----Circuit inductance;

[0008] R----Circuit resistance;

[0009] I----current;

[0010] U A ---- Arc voltage between contacts.

[0011] As can be seen from the above relationships, the number of arc-extinguishing grids in the arc-extinguishing chamber is most strongly correlated with the arc voltage. Research has shown that approximately 30V of voltage can be interrupted between each two grids. If calculated based on 30V, then approximately 50 grids are needed for 1500V, while approximately 66 grids are needed for 2000V.

[0012] However, conventional frame-type disconnecting switches, due to the small distance between the moving and stationary contacts, can only accommodate a limited number of arc-extinguishing grids. The grids cannot be too small and must also have sufficient heat capacity to withstand burn-out. Therefore, it is necessary to increase the space that the arc-extinguishing chamber can occupy, thereby increasing the number of arc-extinguishing grids.

[0013] In traditional frame circuit breakers or frame-type disconnect switches, the arc-extinguishing chamber is located above the moving and stationary contacts within the casing. The lines typically exit from the rear of the switch, directly below the arc-extinguishing chamber. This results in inefficient use of the space above the terminal block, making it impossible to arrange more arc-extinguishing grids to extinguish the arc generated during interruption. Summary of the Invention

[0014] The purpose of this invention is to address the limitations of existing frame-type disconnect switches, which occupy limited space and make it difficult to arrange more arc-extinguishing grids. This invention provides a structure where the stationary contact terminal block and the arc-extinguishing chamber are staggered on the rear side of the disconnect switch, and the resulting disconnect switch itself. This fully utilizes the height of the disconnect switch, with the terminal block and arc-extinguishing chamber arranged in an alternating manner. In this way, without increasing the height of the disconnect switch, the space occupied by the arc-extinguishing chamber can be increased, allowing for the arrangement of more arc-extinguishing grids, thereby improving the breaking capacity of the disconnect switch. Simultaneously, the installation method of the disconnect switch remains unchanged.

[0015] Technical solution

[0016] To achieve the above-mentioned technical objectives, the present invention provides a structure in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch. It includes a housing, in which a moving contact and a stationary contact are installed. The engagement and disengagement of the moving contact and the stationary contact control the on / off state of the disconnecting switch. When the moving contact and the stationary contact are disconnected, the arc generated enters the arc-extinguishing chamber and is extinguished. The characteristic feature is that the stationary contact terminal block and at least part of the arc-extinguishing chamber are located behind the switch.

[0017] In one embodiment, the projections of the stationary contact terminal block and the arc-extinguishing chamber in the first direction at least partially overlap.

[0018] In one embodiment, the stationary contact terminal block and the arc-extinguishing chamber are misaligned in the second direction.

[0019] In one embodiment, the moving contact terminal block and the arc-extinguishing chamber are aligned in a second direction.

[0020] In one embodiment, the stationary contact terminal block is located on both sides of all arc-extinguishing chambers as a whole.

[0021] In one embodiment, the stationary contact terminal wiring bar is arranged on the same side of the arc-extinguishing chamber.

[0022] In one embodiment, the stationary contact terminal block is integrated with the stationary contact.

[0023] In one embodiment, the stationary contact terminal block is U-shaped with the stationary contact.

[0024] In one embodiment, the arc-extinguishing chamber includes an arc-extinguishing grid, which includes an upper arc-extinguishing grid group and a lower arc-extinguishing grid group. The upper arc-extinguishing grid group is located in a space extending from above the moving contact to the rear of the switch, and the lower arc-extinguishing grid group is located in a space behind and below the stationary contact.

[0025] In one embodiment, the lower arc-extinguishing grid assembly is located behind the stationary contact and at least partially overlaps with the projection of the stationary contact in a third direction.

[0026] In one embodiment, the stationary contact is connected to the lower arc-extinguishing grid group via an arc-inducing plate one, and the lower arc-extinguishing grid group is connected to the upper arc-extinguishing grid group via an arc-inducing plate two.

[0027] In one embodiment, the arc-extinguishing chamber is shaped like the number 7.

[0028] The present invention provides a disconnecting switch, comprising the aforementioned stationary contact terminal block and arc-extinguishing chamber disposed at the rear of the switch.

[0029] Beneficial effects

[0030] This invention provides a structure in which the stationary contact terminal block and the arc-extinguishing chamber are located behind the switch. It includes a housing containing a moving contact and a stationary contact. The engagement and disengagement of the moving and stationary contacts control the on / off state of the disconnecting switch. When the moving and stationary contacts break, the arc generated enters the arc-extinguishing chamber and is extinguished. The stationary contact terminal block and the arc-extinguishing chamber are offset behind the disconnecting switch. Without increasing the height of the disconnecting switch, the space occupied by the arc-extinguishing chamber can be increased, allowing for the arrangement of more arc-extinguishing grids, thereby improving the breaking capacity of the disconnecting switch, while also maintaining the installation method of the disconnecting switch. Attached Figure Description

[0031] 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.

[0032] Appendix Figure 1 This is a schematic diagram of the product according to Embodiment 1 of the present invention;

[0033] Appendix Figure 2 This is a schematic diagram of the internal layout structure in Embodiment 1 of the present invention;

[0034] Appendix Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0035] Appendix Figure 4 This is a schematic diagram of the connection between the stationary contact and the stationary contact terminal in Embodiment 1 of the present invention;

[0036] Appendix Figure 5 This is a product diagram of the arc-extinguishing chamber in Embodiment 1 of the present invention;

[0037] Appendix Figure 6 This is a schematic diagram of the arc-extinguishing grid connection in Embodiment 1 of the present invention;

[0038] Appendix Figure 7 This is a schematic diagram of the product according to Embodiment 2 of the present invention; Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Example 1

[0045] In traditional frame circuit breakers or frame-type disconnect switches, the arc-extinguishing chamber is located above the moving and stationary contacts within the casing, and the wiring typically exits from the rear of the switch. This results in inefficient use of the space behind the arc-extinguishing chamber and above the terminal block, making it impossible to arrange more arc-extinguishing grids to extinguish the arc generated during breaking. To solve this problem, as shown in the attached... Figure 1 As shown in Figures 2 and 3, this embodiment provides a structure in which the stationary contact terminal block and the arc-extinguishing chamber are located behind the switch. It includes a housing 1, within which a moving contact 2 and a stationary contact 3 are housed. The engagement and disengagement of the moving contact 2 and the stationary contact 3 control the on / off state of the disconnecting switch. The arc generated when the moving contact 2 and the stationary contact 3 break enters the arc-extinguishing chamber 4 and is extinguished. The stationary contact terminal block 5 and at least part of the arc-extinguishing chamber 4 are located behind the switch. In this way, without increasing the height of the disconnecting switch, the space occupied by the arc-extinguishing chamber can be increased, allowing for the arrangement of more arc-extinguishing grids, thereby improving the breaking capacity of the disconnecting switch, while also not changing the installation method of the disconnecting switch.

[0046] As attached Figure 1As shown, let the horizontal left-right arrows along the rear side of the switch be the first direction, the vertical arrows along the rear side of the switch be the second direction, and the forward-backward arrows along the rear side of the switch be the third direction. The projections of the stationary contact terminal block 5 and the arc-extinguishing chamber 4 in the first direction at least partially overlap. The stationary contact terminal block 5 and the arc-extinguishing chamber 4 are not aligned in the second direction, while the moving contact terminal block 8 and the arc-extinguishing chamber 4 are aligned in the second direction. Specifically, as shown in the attached... Figure 1 As shown, in this embodiment, the stationary contact terminal wiring bar 5 is arranged on the same side of the arc-extinguishing chamber 4. (See attached diagram) Figure 4 As shown, the stationary contact terminal block 5 and the stationary contact 3 are integrated. The stationary contact terminal block 5 and the stationary contact 3 are U-shaped.

[0047] As attached Figure 2 As shown in Figures 3 and 5, the arc-extinguishing chamber 4 includes an arc-extinguishing grid a, which comprises an upper arc-extinguishing grid group a1 and a lower arc-extinguishing grid group a2. The upper arc-extinguishing grid group a1 is located in the space extending from above the moving contact 2 to the rear of the switch, and the lower arc-extinguishing grid group a2 is located in the space behind and downward of the stationary contact 3. Furthermore, the lower arc-extinguishing grid group a2, located in the space behind the stationary contact 3, at least partially overlaps with the projection of the stationary contact 3 in a third direction.

[0048] As attached Figure 6 As shown, the stationary contact 3 is connected to the lower arc-extinguishing grid group a2 via the arc-initiating plate 6, and the lower arc-extinguishing grid group a2 is connected to the upper arc-extinguishing plate group a1 via the arc-initiating plate 7. (See attached diagram) Figure 5 As shown, the arc-extinguishing chamber 4 is shaped like a "7". This structure of the arc-extinguishing chamber makes full use of the increased space after the positions of the stationary and moving contacts are changed.

[0049] Example 2

[0050] As attached Figure 7 As shown, the stationary contact terminal block 5 is located on both sides of all the arc-extinguishing chambers 4 as a whole, forming another structure in which the stationary contact terminal block 5 and the arc-extinguishing chamber 4 are arranged behind the switch. Other structures are the same as in Embodiment 1.

[0051] This embodiment also provides a switch, particularly a frame circuit breaker or frame-type disconnect switch, including the aforementioned stationary contact terminal block and arc-extinguishing chamber arranged behind the switch.

[0052] This invention can increase the space occupied by the arc-extinguishing chamber without increasing the height of the disconnecting switch, thereby arranging more arc-extinguishing grid plates and improving the breaking capacity of the disconnecting switch, without changing the orientation of the disconnecting switch.

[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 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 structure in which a stationary contact terminal block and an arc-extinguishing chamber are disposed behind a switch, comprising a housing (1), wherein a moving contact (2) and a stationary contact (3) are disposed within the housing (1), the engagement and disengagement of the moving contact (2) and the stationary contact (3) controlling the opening and closing of the disconnecting switch, and the arc generated when the moving contact (2) and the stationary contact (3) are disconnected entering the arc-extinguishing chamber (4) and being extinguished, characterized in that: The stationary contact terminal block (5) and at least part of the arc-extinguishing chamber (4) are located behind the switch; The arc-extinguishing chamber (4) includes an arc-extinguishing grid plate (a), which includes an upper arc-extinguishing grid plate group (a1) and a lower arc-extinguishing grid plate group (a2). The upper arc-extinguishing grid plate group (a1) is located in the space behind the switch extending from above the moving contact (2), and the lower arc-extinguishing grid plate group (a2) is located in the space behind and downward of the stationary contact (3). The stationary contact terminal block and the arc-extinguishing chamber are offset behind the disconnector.

2. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The projections of the stationary contact terminal block (5) and the arc-extinguishing chamber (4) in the first direction at least partially overlap.

3. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The stationary contact terminal block (5) and the arc-extinguishing chamber (4) are not aligned in the second direction.

4. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The moving contact terminal block (8) and the arc-extinguishing chamber (4) are aligned in the second direction.

5. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The stationary contact terminal block (5) is located on both sides of all the arc-extinguishing chambers (4).

6. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The stationary contact terminal block (5) is arranged on the same side of the arc extinguishing chamber (4).

7. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The stationary contact terminal block (5) is integrated with the stationary contact (3).

8. The structure described in claim 7, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The terminal block (5) of the stationary contact and the stationary contact (3) are in the shape of a U.

9. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The lower arc-extinguishing grid plate group (a2) is located behind the stationary contact (3) and at least partially overlaps with the projection of the stationary contact (3) in a third direction.

10. The structure described in claim 1, in which the stationary contact terminal block and the arc-extinguishing chamber are arranged behind the switch, is characterized in that: The stationary contact (3) is connected to the lower arc extinguishing grid group (a2) through the first arc-starting plate (6), and the lower arc extinguishing grid group (a2) is connected to the upper arc extinguishing plate group (a1) through the second arc-starting plate (7).

11. The structure of the stationary contact terminal block and the arc-extinguishing chamber arranged behind the switch as described in claim 1, characterized in that: The arc-extinguishing chamber (4) is shaped like the number 7.

12. A switch, characterized in that: The structure comprising the stationary contact terminal block and the arc-extinguishing chamber as described in any one of claims 1 to 11, wherein the terminal block and the arc-extinguishing chamber are disposed behind the switch.

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