Layout structure of arc extinguish chamber and contact system of frame circuit breaker or disconnecting switch

Abstract

A layout structure of an arc extinguish chamber and a contact system of a frame circuit breaker or a disconnecting switch is characterized in that the layout structure comprises a moving contact and a static contact, the moving contact and the static contact are arranged in a shell and located below the arc extinguish chamber, and electric arcs generated when the moving contact and the static contact are disconnected can be guided into the arc extinguish chamber to be extinguished. The maximum distance between the moving silver point on the moving contact and the static silver point on the static contact in the rotating process of the moving contact is the rotating opening distance of the moving contact, and the ratio of the opening distance to the width of the arc extinguish chamber is 1: (2.9-3.3). The relative positions of the arc extinguish chamber, the moving contact and the static contact of the frame circuit breaker or the disconnecting switch are improved, so that the capacity of the arc extinguish chamber of the frame circuit breaker or the disconnecting switch is increased, arc extinguish grid plates can be arranged in the arc extinguish chamber as many as possible, and meanwhile, the arc extinguish grid plates can be arranged in the arc extinguish chamber. The arc generated when the moving contact and the static contact are disconnected can enter the arc extinguish chamber in the fastest and optimal path to be extinguished, so that the disconnecting performance of the frame circuit breaker or the disconnecting switch is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of frame circuit breakers or disconnectors, and in particular relates to a layout structure of an arc extinguishing chamber and a contact system of a frame circuit breaker or disconnector. Background Art

[0002] A circuit breaker or disconnector is a type of electrical switch that can connect, carry, and disconnect current under normal circuit conditions, as well as connect, carry, and disconnect current for a specified period of time under specified abnormal circuit conditions. With the development of DC power systems such as photovoltaics, energy storage, rail transit, and data centers, switches are becoming increasingly common in DC systems. Traditional circuit breakers or disconnectors are primarily used in AC power systems, with fewer used in DC power systems. Unlike AC systems, DC systems lack a natural zero-crossing phenomenon and cannot extinguish the arc at the instant the AC current crosses zero. Instead, they rely on rapidly lengthening and cooling the arc to cause the arc voltage to exceed the power supply voltage, extinguishing the arc. The relative positions of the moving contact, the static contact and the arc extinguishing chamber can affect the arc extinguishing ability of the arc extinguishing chamber of the frame circuit breaker or the disconnector. In the prior art, due to the unreasonable relative position arrangement between the moving contact, the static contact and the arc extinguishing chamber, the maximum opening distance that the moving contact and the static contact can rotate when opening is limited, and the number of arc extinguishing grids that can be arranged in the arc extinguishing chamber is also limited, which makes it difficult to effectively extend the arc and the arc entering the arc extinguishing chamber is difficult to be effectively extinguished, thereby reducing the breaking performance of the frame circuit breaker or the disconnector. Summary of the Invention

[0003] The purpose of the present invention is to address the defects that the relative positions of the above-mentioned existing moving contacts, static contacts and arc extinguishing chambers are unreasonable, resulting in a limited rotational distance between the moving contacts and the static contacts when they are disconnected, and the number of arc extinguishing grids that can be arranged in the arc extinguishing chamber is limited, which makes it difficult for the arc to be effectively elongated and the arc entering the arc extinguishing chamber to be effectively extinguished. A layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnecting switch is provided, and by improving the relative positions between the arc extinguishing chamber, moving contacts and static contacts of the frame circuit breaker or disconnecting switch, the capacity of the arc extinguishing chamber of the frame circuit breaker or disconnecting switch is increased, which is conducive to arranging as many arc extinguishing grids as possible in the arc extinguishing chamber. At the same time, the arc generated when the moving contact and the static contact are disconnected can enter the arc extinguishing chamber and be extinguished in the fastest and optimal path, thereby improving the breaking performance of the frame circuit breaker or disconnecting switch.

[0004] Technical Solution

[0005] In order to achieve the above technical objectives, the present invention provides a layout structure of an arc extinguishing chamber and contact system of a frame circuit breaker or disconnector, which includes a moving contact and a static contact. The moving contact and the static contact are arranged in a housing and located below the arc extinguishing chamber. The arc generated when the moving contact and the static contact are disconnected can be guided into the arc extinguishing chamber and extinguished. It is characterized in that: the maximum distance between the moving silver point on the moving contact and the static silver point on the static contact during the rotation of the moving contact is the opening distance of the moving contact, and the ratio of the opening distance to the width of the arc extinguishing chamber is 1:(2.9~3.3).

[0006] In one embodiment, the ratio of the opening distance to the width of the arc extinguishing chamber is 1:3.1.

[0007] In one embodiment, the ratio of the distance from the static silver point to the leftmost arc-extinguishing grid in the arc-extinguishing grid group to the width of the arc-extinguishing chamber is 1:(1.00-1.26).

[0008] Furthermore, the ratio of the distance from the static silver point to the leftmost arc-extinguishing grid in the arc-extinguishing grid group to the width of the arc-extinguishing chamber is preferably 1:1.15.

[0009] In one embodiment, the ratio of the distance from the moving silver point to the rightmost arc extinguishing grid piece 2 in the arc extinguishing grid piece group to the width of the arc extinguishing chamber is 1:(2.00-2.50).

[0010] Furthermore, the ratio of the distance from the moving silver point to the rightmost arc extinguishing grid piece 2 in the arc extinguishing grid piece group to the width of the arc extinguishing chamber is preferably 1:2.25.

[0011] In one embodiment, the ratio of the height to the width of the arc extinguishing chamber is 1:(0.9-1.1).

[0012] Furthermore, the ratio of the height to the width of the arc extinguishing chamber is preferably 1:1.

[0013] In one embodiment, the ratio of the length to the width of the arc extinguishing grid in the arc extinguishing chamber is (1.1-1.35):1.

[0014] Furthermore, the ratio of the length to the width of the arc extinguishing grid in the arc extinguishing chamber is preferably 1.2:1.

[0015] In one embodiment, the ratio of the distance between the moving arc silver point and the static arc silver point to the distance between the moving silver point and the static silver point is 1:(0.8-1.0).

[0016] Furthermore, the ratio of the distance between the moving arc silver point and the static arc silver point to the distance between the moving silver point and the static silver point is preferably 1:0.9.

[0017] In one embodiment, the ratio of the distance from the static arc silver point to the leftmost arc quenching grid in the arc quenching grid group to the width of the arc quenching chamber is 1:(1.00-1.26).

[0018] Furthermore, the ratio of the distance from the static arc silver point to the leftmost arc extinguishing grid in the arc extinguishing grid group to the width of the arc extinguishing chamber is preferably 1:1.15.

[0019] In one embodiment, the ratio of the distance from the moving arc silver point to the rightmost arc extinguishing grid 2 in the arc extinguishing grid group to the width of the arc extinguishing chamber is 1:(1.80-2.3).

[0020] Furthermore, the ratio of the distance from the moving arc silver point to the rightmost arc extinguishing grid piece 2 in the arc extinguishing grid piece group to the width of the arc extinguishing chamber is preferably 1:2.05.

[0021] Beneficial effects

[0022] The present invention provides a layout structure for an arc extinguishing chamber and contact system for a frame circuit breaker or disconnector, characterized in that it includes a moving contact and a stationary contact, the moving contact and the stationary contact being arranged within a housing below the arc extinguishing chamber. The arc generated when the moving and stationary contacts are disconnected can be guided into the arc extinguishing chamber and extinguished. The maximum distance between the moving and stationary points on the moving contact during rotation of the moving contact is the moving contact's rotational distance, and the ratio of the moving contact's rotational distance to the width of the arc extinguishing chamber is 1:(2.9-3.3). By improving the relative positions of the arc extinguishing chamber, the moving contact, and the stationary contact of the frame circuit breaker or disconnector, the capacity of the arc extinguishing chamber of the frame circuit breaker or disconnector is increased, facilitating the arrangement of as many arc extinguishing grids as possible within the arc extinguishing chamber. At the same time, the arc generated when the moving and stationary contacts are disconnected can enter the arc extinguishing chamber and be extinguished along the fastest and most optimal path, thereby improving the disconnecting performance of the frame circuit breaker or disconnector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Attachment Figure 1 This is a product diagram of a frame circuit breaker or disconnector in an open state according to an embodiment of the present invention.

[0025] Attachment Figure 2 It is attached Figure 1 A-axis sectional view.

[0026] Attachment Figure 3 This is a product diagram of the arc extinguishing chamber in an embodiment of the present invention.

[0027] Attachment Figure 4 It is attached Figure 3 Middle B-direction sectional view. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0030] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0033] Example

[0034] In the prior art, due to the unreasonable relative position arrangement between the moving contact, the static contact and the arc extinguishing chamber, the maximum opening distance that the moving contact and the static contact can rotate when opening is limited, and the number of arc extinguishing grids that can be arranged in the arc extinguishing chamber is also limited, resulting in the arc being difficult to be effectively extended, and the arc entering the arc extinguishing chamber is also difficult to be effectively extinguished, thereby reducing the breaking performance of the frame circuit breaker or disconnector.

[0035] In order to solve the above problems. Figure 1 and 2 As shown, this embodiment provides a layout structure of an arc extinguishing chamber and contact system for a frame circuit breaker or disconnector, which includes a moving contact 1 and a static contact 2. The moving contact 1 and the static contact 2 are arranged in a housing 3 below the arc extinguishing chamber 4. The arc generated when the moving contact 1 and the static contact 2 are disconnected can be guided into the arc extinguishing chamber 4 and extinguished. The maximum distance between the moving silver point 101 on the moving contact 1 and the static silver point 201 on the static contact 2 during the rotation of the moving contact 1 is the opening distance m of the moving contact 1, and the ratio of the opening distance m to the width K of the arc extinguishing chamber 4 is 1:(2.9-3.3). In this embodiment, the opening distance m is preferably 43-56 mm, and the ratio of the opening distance m to the width K of the arc extinguishing chamber 4 is 1:3.1.

[0036] Moving contact 101 and static contact 201, as well as moving arcing contact 1a and static arcing contact 2a, are the corresponding contact points between moving contact 2 and static contact 3 when the frame circuit breaker or disconnector is closed. Moving contact 101 and moving arcing contact 1a are located on the long contact piece 100 in moving contact 1. By improving the relative positions between the arc extinguishing chamber 4, moving contact 1, and static contact 2 of the frame circuit breaker or disconnector, the arc generated when the moving and static contacts are disconnected can enter the arc extinguishing chamber and be extinguished via the fastest and most optimal path, thereby improving the breaking performance of the frame circuit breaker or disconnector.

[0037] The relative positions of the moving contact, the static contact and the arc extinguishing chamber are further defined below with reference to the accompanying drawings.

[0038] As attached Figure 2As shown, the ratio of the distance P between the static silver point 201 and the leftmost arc-quenching grid 4a01 in the arc-quenching grid group 4a to the width K of the arc-quenching chamber 4 is 1:(1.00-1.26). In this embodiment, the ratio of the distance P between the static silver point 201 and the leftmost arc-quenching grid 4a01 in the arc-quenching grid group 4a to the width K of the arc-quenching chamber 4 is preferably 1:1.15. The ratio of the distance S between the moving silver point 101 and the rightmost arc-quenching grid 4a02 in the arc-quenching grid group 4a to the width K of the arc-quenching chamber 4 is 1:(2.00-2.50). In this embodiment, the ratio of the distance S between the moving silver point 101 and the rightmost arc-quenching grid 4a02 in the arc-quenching grid group 4a to the width K of the arc-quenching chamber 4 is preferably 1:2.25.

[0039] As attached Figure 3 and 4 As shown, the ratio of the height to the width K of the arc extinguishing chamber 4 is 1:(0.9-1.1). In this embodiment, the ratio of the height to the width K of the arc extinguishing chamber 4 is preferably 1:1. The ratio of the length to the width of the arc extinguishing grid in the arc extinguishing chamber 4 is (1.1-1.35):1. In this embodiment, the ratio of the length to the width of the arc extinguishing grid in the arc extinguishing chamber 4 is preferably 1.2:1.

[0040] The ratio of the distance Q between the moving arc point 1a and the static arc point 2a to the distance between the moving arc point 101 and the static arc point 201 is 1:(0.8-1.0). In this embodiment, the ratio of the distance Q between the moving arc point 1a and the static arc point 2a to the distance between the moving arc point 101 and the static arc point 201 is preferably 1:0.9. The ratio of the distance from the static arc point 2a to the leftmost arc quenching grid 4a01 in the arc quenching grid group 4a to the width K of the arc quenching chamber 4 is 1:(1.00-1.26). In this embodiment, the ratio of the distance from the static arc point 2a to the leftmost arc quenching grid 4a01 in the arc quenching grid group 4a to the width K of the arc quenching chamber 4 is preferably 1:1.15.

[0041] As attached Figure 2As shown, the ratio of the distance T between the moving arc point 1a and the rightmost arc quenching grid 4a02 in the arc quenching grid group 4a to the width K of the arc quenching chamber 4 is 1:(1.80-2.3). In this embodiment, the ratio of the distance T between the moving arc point 1a and the rightmost arc quenching grid 4a02 in the arc quenching grid group 4a to the width K of the arc quenching chamber 4 is preferably 1:2.05. By defining the relative positions between the arc quenching chamber, the moving contact, and the static contact of the frame circuit breaker or disconnector, the capacity of the arc quenching chamber of the frame circuit breaker or disconnector can be maximized, which is conducive to arranging as many arc quenching grids as possible within the arc quenching chamber. At the same time, the arc generated when the moving contact and the static contact are disconnected can enter the arc quenching chamber and be extinguished through the fastest and most optimal path, thereby improving the breaking performance of the frame circuit breaker or disconnector. It should be noted that this embodiment uses a frame circuit breaker or a disconnector as an illustrative object. In fact, any technical solution inspired by this embodiment should be considered to fall within the protection scope of the present invention.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0043] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A layout structure of an arc extinguishing chamber and a contact system of a frame circuit breaker or disconnector, comprising a movable contact (1) and a stationary contact (2), wherein the movable contact (1) and the stationary contact (2) are arranged in a housing (3) below the arc extinguishing chamber (4), and an arc generated when the movable contact (1) and the stationary contact (2) are disconnected can be guided into the arc extinguishing chamber (4) and extinguished, characterized in that: The maximum distance between the moving silver point (101) on the moving contact (1) and the static silver point (201) on the static contact (2) during the rotation of the moving contact (1) is the opening distance (m) of the moving contact (1), and the ratio of the opening distance (m) to the width (K) of the arc extinguishing chamber (4) is 1:(2.9-3.3).

2. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the opening distance (m) to the width (K) of the arc extinguishing chamber (4) is 1:3.

1.

3. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the distance (P) between the static silver point (201) and the leftmost arc extinguishing grid piece (4a01) in the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:(1.00-1.26).

4. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 3, characterized in that: The ratio of the distance (P) between the static silver point (201) and the leftmost arc extinguishing grid piece (4a01) in the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:1.

15.

5. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the distance (S) between the moving silver point (101) and the second arc extinguishing grid piece (4a02) on the rightmost side of the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:(2.00-2.50).

6. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 5, characterized in that: The ratio of the distance (S) between the moving silver point (101) and the second arc extinguishing grid piece (4a02) on the rightmost side of the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:2.

25.

7. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the height to the width (K) of the arc extinguishing chamber (4) is 1:(0.9-1.1).

8. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 7, characterized in that: The ratio of the height to the width (K) of the arc extinguishing chamber (4) is 1:

1.

9. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the length to the width of the arc extinguishing grid in the arc extinguishing chamber (4) is (1.1-1.35):

1.

10. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 9, characterized in that: The ratio of the length to the width of the arc extinguishing grid in the arc extinguishing chamber (4) is 1.2:

1.

11. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the distance (Q) between the moving arc silver point (1a) and the static arc silver point (2a) to the distance between the moving silver point (101) and the static silver point (201) is 1:(0.8-1.0).

12. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 11, characterized in that: The ratio of the distance (Q) between the moving arc silver point (1a) and the static arc silver point (2a) to the distance between the moving silver point (101) and the static silver point (201) is 1:0.

9.

13. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the distance from the static arc silver point (2a) to the leftmost arc extinguishing grid piece (4a01) in the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:(1.00-1.26).

14. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 13, characterized in that: The ratio of the distance between the static arc silver point (2a) and the leftmost arc extinguishing grid piece (4a01) in the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:1.

15.

15. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 1, characterized in that: The ratio of the distance (T) between the moving arc silver point (1a) and the rightmost arc extinguishing grid piece 2 (4a02) in the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:(1.80-2.3).

16. The layout structure of the arc extinguishing chamber and contact system of a frame circuit breaker or disconnector according to claim 15, characterized in that: The ratio of the distance (T) between the moving arc silver point (1a) and the rightmost arc extinguishing grid piece 2 (4a02) in the arc extinguishing grid piece group (4a) to the width (K) of the arc extinguishing chamber (4) is 1:2.05.

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