An arc extinguishing system for rotary disconnect switches

Abstract

This utility model relates to an arc-extinguishing system for a rotary disconnector, comprising: a moving contact that reciprocates between a closed position and an open position within a housing; a stationary contact positioned in the closed position within the housing; an arc-extinguishing chamber positioned on the housing between the closed and open positions; an arc-inducing plate positioned on the stationary contact and guiding the arc segment from the stationary contact side into the arc-extinguishing chamber; and a U-shaped plate with a magnetic block to create a magnetic field within its U-shaped cavity. The U-shaped plate is positioned on the open position side and close to the arc-extinguishing chamber, with the U-shaped cavity facing the stationary contact. During the rotation of the moving contact from the closed position to the open position, the first half of the moving contact's movement is extinguished by the arc-extinguishing chamber, while the second half enters the U-shaped cavity, and the arc on the moving contact is blown into the arc-extinguishing chamber by the Lorentz force for arc extinguishing. This arc-extinguishing system enhances the magnetic blow-out effect while also improving the utilization rate of each arc-extinguishing grid within the arc-extinguishing chamber.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment, specifically to an arc extinguishing system for a rotary disconnector switch. Background Technology

[0002] A rotary disconnector is a switchgear specifically designed for low-voltage DC applications. This type of disconnector is rated at 1500V DC and can provide current from 63A to 630A, specifically for isolation protection in low-voltage DC environments. An arc-extinguishing system is installed between the moving and stationary contacts of the rotary switch. When the moving contact switches between the open and closed positions, an electric arc is generated; this arc is extinguished by the arc-extinguishing system.

[0003] Current arc extinguishing systems mainly involve setting up multiple arc-extinguishing grids inside the arc extinguishing chamber. These grids extinguish the electric arc. To increase the arc extinguishing capacity of the arc extinguishing chamber, magnetic blocks are added to the outside of the chamber. These magnetic blocks guide and concentrate the magnetic field, driving the electric arc into the chamber and improving the arc extinguishing effect.

[0004] See the prior patent CN2809830Y-Magnetic blowout arc extinguishing device for dual power automatic transfer switch. By adding a U-shaped iron plate outside the arc extinguishing chamber and magnetizing the U-shaped iron plate with a magnetic block, the arc extinguishing chamber structure has a large part of the magnetic field lines passing through the arc extinguishing grid plates inside the arc extinguishing chamber. In actual operation, the magnetic field force inside the U-shaped iron plate is weakened, and the utilization rate of each arc extinguishing grid plate inside the arc extinguishing chamber is also reduced.

[0005] In summary, in the current arc extinguishing system, the magnetic field region of the magnetic block overlaps with that of each arc extinguishing grid, which affects the magnetic blowing effect of the magnetic block during operation and also reduces the utilization rate of each arc extinguishing grid. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an arc extinguishing system for rotary disconnect switches, thereby solving the technical problem of low utilization rate of arc extinguishing grid plates in current arc extinguishing systems.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] An arc extinguishing system for a rotary disconnector is provided, comprising:

[0009] The moving contact reciprocates between the closed and open positions within the housing;

[0010] The stationary contact is located in the closed position on the casing;

[0011] The arc-extinguishing chamber is installed on the casing and located between the closed and open positions;

[0012] An arc-starting plate is installed on the stationary contact and introduces the arc segment on the stationary contact side into the arc-extinguishing chamber.

[0013] A U-shaped plate is provided with a magnetic block to form a magnetic field inside the U-shaped cavity. The U-shaped plate is located on the side of the open position and close to the arc-extinguishing chamber. The U-shaped cavity faces the stationary contact.

[0014] During the process of the moving contact rotating from the closed position to the open position, the first half of the moving contact is extinguished by the arc-extinguishing chamber, and the second half of the moving contact enters the U-shaped cavity. The electric arc on the moving contact is blown into the arc-extinguishing chamber by the Lorentz force to extinguish the arc.

[0015] Furthermore, the arc-extinguishing chamber has an "L" shaped structure, so that a corner opening is formed on the arc-extinguishing chamber. The corner opening is located at the end corner of the arc-extinguishing chamber near the open position, and the U-shaped plate extends into the corner opening.

[0016] Furthermore, a U-shaped bracket is provided on the housing, and the area of ​​the U-shaped bracket corresponds to the travel area of ​​the moving contact end;

[0017] The front half of the U-shaped bracket is engaged with each of the arc-extinguishing grid plates in the arc-extinguishing chamber, and the U-shaped plate is connected to the rear half of the U-shaped bracket.

[0018] Furthermore, the U-shaped bracket has an arc-shaped structure.

[0019] Furthermore, an installation opening is provided on the middle side plate of the U-shaped plate, and the magnetic block is disposed in the installation opening.

[0020] Furthermore, the arc-extinguishing chamber includes a top plate, a bottom plate, and multiple arc-extinguishing grids;

[0021] Each arc-extinguishing grid is disposed between the top plate and the bottom plate. Each arc-extinguishing grid is divided into a front grid and a rear grid, and the length of the front grid is greater than that of the rear grid.

[0022] The moving contact moves in the first half of its travel within each front grid plate, while each rear grid plate is located on one side of the U-shaped plate.

[0023] The beneficial effects of this utility model are:

[0024] The rotary disconnector switch arc extinguishing system of this invention separates the magnetic blowing area from the arc extinguishing chamber area to avoid mutual interference between the arc extinguishing grid and the magnetic field in the arc extinguishing chamber. The arc extinguishing of the first half of the moving contact's stroke is handled by the arc extinguishing chamber, while the arc extinguishing of the second half of the moving contact's stroke is handled by the magnetic field blowing. The electric arc on the moving contact is blown into the arc extinguishing chamber by the Lorentz force to extinguish the arc.

[0025] This arc-extinguishing system enhances the magnetic blow-out effect while also improving the utilization rate of each arc-extinguishing grid plate in the arc-extinguishing chamber. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a perspective view of the arc extinguishing system for the rotary disconnector switch of this utility model;

[0028] Figure 2 This is a structural diagram of the U-shaped plate and the U-shaped bracket;

[0029] Figure 3 This is a schematic diagram of the arc-extinguishing chamber;

[0030] Figure 4 This is a structural diagram of the arc-extinguishing chamber and the U-shaped support;

[0031] Figure 5 This is a top view of the arc extinguishing system for the rotary disconnector switch of this utility model;

[0032] Among them, 1. housing, 11. moving contact, 12. stationary contact, 13. arc-starting plate;

[0033] 2. Arc extinguishing chamber; 21. Top plate; 22. Bottom plate; 23. Front grid plate; 24. Rear grid plate;

[0034] 3. U-shaped bracket;

[0035] 4. U-shaped plate, 41. Magnetic block. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] This application provides an arc-extinguishing system for a rotary disconnector switch, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0038] To address the technical problem of low utilization rate of arc-extinguishing grid plates in existing arc-extinguishing systems, an embodiment of this application provides an arc-extinguishing system for rotary disconnect switches. This is described in detail below.

[0039] like Figures 1 to 5 As shown, an arc-extinguishing system for a rotary disconnector includes...

[0040] The moving contact 11 reciprocates between the closed and open positions within the housing 1.

[0041] The stationary contact 12 is located in the closed position of the housing 1;

[0042] Arc-extinguishing chamber 2 is installed on the casing 1 and is located between the closed and open positions;

[0043] An arc-starting plate 13 is disposed on the stationary contact 12 and introduces the arc segment on the side of the stationary contact 12 into the arc-extinguishing chamber 2.

[0044] U-shaped plate 4, on which magnetic blocks 41 are provided to form a magnetic field in its U-shaped cavity, the U-shaped plate 4 is located on the side of the open position and close to the arc extinguishing chamber 2, the U-shaped cavity is facing the stationary contact 12;

[0045] During the process of rotating the moving contact 11 from the closed position to the open position, the first half of the moving contact 11 is extinguished by the arc-extinguishing chamber 2, and the second half of the moving contact 11 enters the U-shaped cavity. The electric arc on the moving contact 11 is blown into the arc-extinguishing chamber 2 by the Lorentz force to extinguish the arc.

[0046] The arc extinguishing process in the first half of the process is carried out by arc extinguishing chamber 2, which means that the arc is extinguished by dividing the electric arc through arc extinguishing grid plates.

[0047] Specifically, the U-shaped plate 4 is made of iron, which allows it to be affected by the magnetic field of the magnetic block 41.

[0048] Specifically, as an optional implementation method in this embodiment, such as Figure 3 and Figure 4 As shown, the arc-extinguishing chamber 2 has an "L" shaped structure, so that a corner opening is formed on the arc-extinguishing chamber 2. The corner opening is located at the end corner of the arc-extinguishing chamber 2 near the open position, and the U-shaped plate 4 extends into the corner opening.

[0049] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 5 As shown, a U-shaped bracket 3 is provided on the housing 1, and the area of ​​the U-shaped bracket 3 corresponds to the travel area of ​​the end of the moving contact 11;

[0050] The front half of the U-shaped bracket 3 is engaged with the arc-extinguishing grid plate at the front position in the arc-extinguishing chamber 2, and the U-shaped plate 4 is connected to the rear half of the U-shaped bracket 3.

[0051] Specifically, the U-shaped bracket 3 has multiple slots at its front end, and the arc-extinguishing grid plate is engaged with the slots to achieve the engagement and positioning of the arc-extinguishing grid plate.

[0052] Specifically, the U-shaped plate 4 is directly sleeved on the outside of the U-shaped bracket 3 and fixed inside the housing 1 along with the U-shaped bracket 3.

[0053] In this embodiment, the U-shaped bracket 3 is made of nylon.

[0054] Specifically, such as Figure 2 As shown, the U-shaped bracket 3 has an arc-shaped structure. The arc-shaped U-shaped bracket 3 is perfectly adapted to the moving area of ​​the end of the moving contact 11.

[0055] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, an installation opening is provided on the middle side plate of the U-shaped plate 4, and the magnetic block 41 is disposed within the installation opening. The installation opening is rectangular.

[0056] The mounting port on the U-shaped plate 4 is not limited to the middle side plate; a magnetic block 41 can also be set at the upper and lower ends of the U-shaped plate 4.

[0057] In this embodiment, the U-shaped plate 4 can also be replaced by two flat plates, that is, the middle side plate of the U-shaped plate 4 is omitted, and then the magnetic blocks 41 are installed on the two flat plates respectively. The flat plates are installed on the U-shaped bracket 3, and at this time, a magnetic field can also be generated between the upper and lower flat plates.

[0058] Specifically, as an optional implementation method in this embodiment, such as Figure 3 and Figure 4 As shown, the arc-extinguishing chamber 2 includes a top plate 21, a bottom plate 22, and multiple arc-extinguishing grids;

[0059] Each arc-extinguishing grid is disposed between the top plate 21 and the bottom plate 22. Each arc-extinguishing grid is divided into a front grid 23 and a rear grid 24, wherein the length of the front grid 23 is greater than that of the rear grid 24.

[0060] The moving contact 11 moves in the first half of its travel within each front grid plate 23, while each rear grid plate 24 is located on one side of the U-shaped plate 4.

[0061] In this embodiment, the boundary between the first and second halves of the moving contact 11 is one-third of the number of arc-extinguishing chamber plates. The front grid plate 23 is a long plate, with a quantity of 6 plates, and the rear grid plate 24 is a short plate, with a quantity of 12 plates. The moving contact 11 is in the first half of its travel when it is located in the area of ​​the front grid plate 23, and in the second half of its travel when it is located in the area of ​​the rear grid plate 24.

[0062] Each arc-extinguishing grid plate is clamped between the top plate 21 and the bottom plate 22 at both ends. The arc-extinguishing grid plates are arranged in parallel. Each front grid plate 23 is located at the front of the arc-extinguishing chamber 2, and each rear grid plate 24 is located at the rear of the arc-extinguishing chamber 2. When the moving contact 11 enters the arc-extinguishing chamber 2, it first enters between each front grid plate 23, where the arc is extinguished by each front grid plate 23. As the moving contact 11 rotates into the U-shaped plate 4 in the second half of the stroke, the arc on the moving contact 11 is affected by the magnetic field, that is, the arc is subjected to the Lorentz force and blown into the arc-extinguishing chamber 2. At this time, the arc is extinguished by each rear grid plate 24 in the arc-extinguishing chamber 2.

[0063] In this embodiment, the arc-initiating plate 13 is located between the stationary contact 12 and the front grid plate 23 of the arc-extinguishing chamber 2. The stationary contact 12 is connected to the power supply. During operation, the arc segment on the side of the stationary contact 12 is introduced into the arc-extinguishing chamber 2 by the arc-initiating plate 13.

[0064] In the arc extinguishing system of this utility model, the initial arc on the stationary contact 12 side is driven to the arc extinguishing chamber 2 by the self-excitation of the arc ignition plate 13. The arc extinguishing in the first half of the stroke relies on the front grid plates 23. In the second half of the stroke, the arc root is given a little help by arranging a magnetic field to blow it into the arc extinguishing chamber 2, where it is extinguished by the rear grid plates 24.

[0065] The rotary disconnect switch in this embodiment is referred to... Figure 1 The moving contact 11 rotates with the housing 1 at its middle position. The housing 1 is equipped with two arc-extinguishing systems. The two ends of the moving contact 11 switch between the open and closed positions respectively. When the moving contact 11 contacts the stationary contact 12, the rotary switch is in the closed state. When the moving contact 11 opens, the moving contact 11 separates from the stationary contact 12. The first half of the moving contact 11 is extinguished by the front grid plate 23, and the second half enters the U-shaped cavity. The arc is blown into each rear grid plate 24 by the Lorentz force and extinguished by each rear grid plate 24.

[0066] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0067] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0068] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0070] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0071] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0072] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An arc extinguishing system for a rotary disconnector, characterized in that include The moving contact (11) reciprocates between the closed and open positions within the housing (1); The stationary contact (12) is located in the closed position of the housing (1); Arc-extinguishing chamber (2) is installed on the casing (1) and located between the closed and open positions; An arc-starting plate (13) is installed on the stationary contact (12) and introduces the arc segment on the side of the stationary contact (12) into the arc-extinguishing chamber (2); U-shaped plate (4), on which magnetic blocks (41) are provided to form a magnetic field in the U-shaped cavity. The U-shaped plate (4) is located on the side of the open position and close to the arc-extinguishing chamber (2). The U-shaped cavity faces the stationary contact (12). During the process of the moving contact (11) rotating from the closed position to the open position, the first half of the moving contact (11) is extinguished by the arc-extinguishing chamber (2), and the second half of the moving contact (11) enters the U-shaped cavity. The electric arc on the moving contact (11) is blown into the arc-extinguishing chamber (2) by the Lorentz force to extinguish the arc.

2. The arc-extinguishing system for a rotary disconnector according to claim 1, characterized in that, The arc-extinguishing chamber (2) has an "L" shaped structure, so that a corner opening is formed on the arc-extinguishing chamber (2). The corner opening is located at the end corner of the arc-extinguishing chamber (2) near the open position, and the U-shaped plate (4) extends into the corner opening.

3. The arc-extinguishing system for a rotary disconnector according to claim 1, characterized in that, A U-shaped bracket (3) is provided on the housing (1), and the area of ​​the U-shaped bracket (3) corresponds to the travel area of ​​the end of the moving contact (11); The front half of the U-shaped bracket (3) is engaged with each arc-extinguishing grid plate in the arc-extinguishing chamber (2), and the U-shaped plate (4) is connected to the rear half of the U-shaped bracket (3).

4. The arc-extinguishing system for a rotary disconnector according to claim 3, characterized in that, The U-shaped bracket (3) has an arc-shaped structure.

5. The arc-extinguishing system for a rotary disconnector according to claim 1, characterized in that, An installation opening is provided on the middle side plate of the U-shaped plate (4), and the magnetic block (41) is disposed in the installation opening.

6. The arc-extinguishing system for a rotary disconnector according to claim 1, characterized in that, The arc-extinguishing chamber (2) includes a top plate (21), a bottom plate (22), and multiple arc-extinguishing grids; Each arc-extinguishing grid is disposed between the top plate (21) and the bottom plate (22). Each arc-extinguishing grid is divided into a front grid (23) and a rear grid (24). The front grid (23) is longer than the rear grid (24). The moving contact (11) moves in the front grid (23) for the first half of its journey, and the rear grid (24) is located on one side of the U-shaped plate (4).

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