Structure with static contact end line bank and arc extinguish chamber arranged behind switch and switch

Abstract

A structure with a static contact end line bank and an arc extinguish chamber arranged behind a switch and the switch, the structure comprises a housing, a moving contact and a static contact are arranged in the housing, the connection and disconnection of the moving contact and the static contact control the on-off of the switch, and the arc generated when the moving contact and the static contact are disconnected enters the arc extinguish chamber to be extinguished. The circuit breaker is characterized in that the static contact end line bank and at least part of the arc extinguish chamber are arranged behind the switch. Under the condition that the height of the disconnecting switch product is not increased, the space occupied by the arc extinguishing chamber can be increased, so that more arc extinguishing grid sheets are arranged, the breaking capacity of the disconnecting switch is further improved, and meanwhile, the mounting mode of the disconnecting switch is not changed.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to a structure in which a static contact terminal bank and an arc extinguishing chamber are arranged behind a switch, and the switch. Background Art

[0002] Circuit breakers are an important part of power distribution equipment. They are mainly used in industrial low-voltage power systems to connect and disconnect currents in power grid circuits and protect lines and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. The circuit breaker's function of disconnecting overload or short-circuit currents is mainly accomplished through the arc extinguishing chamber installed in the circuit breaker. When a fault current appears in the circuit and the current value exceeds the set protection range of the intelligent controller, the operating mechanism is driven to operate, causing the moving and static contacts of the circuit breaker to disconnect quickly. At this time, the voltage between the moving and static contacts causes the air medium to discharge, thereby generating a high-temperature arc.

[0003] In the existing technology, in the field of low-voltage electrical appliances, direct current can only reach DC1500V. According to the latest low-voltage electrical appliance industry standard development plan, it will develop to AC2000V and DC3000V. The existing DC1500V products can no longer meet the needs of customers and are in urgent need of replacement.

[0004] Among the frame circuit breakers or frame-type disconnectors on the market, the new products can only reach DC750V for single pole and DC1500V for two poles. The products of various companies cannot reach DC2500V. The arc extinguishing chamber of traditional disconnectors, especially frame-type disconnectors, is generally placed above the moving and static contacts. The arc generated by the switch is extinguished by the arc entering the arc extinguishing chamber after the contacts are opened. The extinction 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] Where 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] From the above relationship, it can be seen that the number of arc extinguishing grids in the arc extinguishing chamber is the most relevant to the arc voltage. After research, it was found that between every two grids, about 30V of voltage can be interrupted. If calculated based on 30V, then 1500V requires about 50 grids, and 2000V requires about 66 grids.

[0012] However, conventional frame-type disconnectors can only accommodate a small number of grids due to the small distance between the moving and static contacts. The grid cannot be too small and needs a certain thermal capacity to resist burning. Therefore, it is necessary to expand 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 disconnectors, the arc extinguishing chamber is arranged above the moving contact and the static contact in the housing. The wires are usually connected at the rear of the switch, and the wire terminals are located directly below the arc extinguishing chamber. This results in the space above the wiring bank not being effectively utilized, and it is impossible to arrange more arc extinguishing grids to extinguish the arc generated during disconnection. Summary of the invention

[0014] The purpose of the present invention is to address the defects of the existing frame-type disconnector that the space that can be occupied is limited and it is difficult to arrange more arc-extinguishing grids, and to provide a structure in which the static contact terminal wiring row and the arc-extinguishing chamber are staggered at the rear side of the disconnector and the disconnector, so as to make full use of the height of the disconnector product, and the wiring row and the arc-extinguishing chamber are staggered. In this way, without increasing the height of the disconnector product, the space that can be occupied by the arc-extinguishing chamber can be increased, so that more arc-extinguishing grids can be arranged, thereby improving the breaking capacity of the disconnector, and at the same time, the installation method of the disconnector is not changed.

[0015] Technical Solution

[0016] In order to achieve the above technical objectives, the present invention provides a structure in which a static contact terminal block and an arc extinguishing chamber are arranged behind a switch, which includes a shell, in which a moving contact and a static contact are installed, and the engagement and separation of the moving contact and the static contact control the on and off of the isolating switch. The arc generated when the moving contact and the static contact are disconnected enters the arc extinguishing chamber and is extinguished. It is characterized in that: the static contact terminal block and at least part of the arc extinguishing chamber are behind the switch.

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

[0018] In one embodiment, the stationary contact terminal row and the arc extinguishing chamber are not aligned in the second direction.

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

[0020] In one embodiment, the static contact terminal banks are located on both sides of all arc extinguishing chambers.

[0021] In one embodiment, the static contact terminal row is arranged on the same side of the arc extinguishing chamber.

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

[0023] In one embodiment, the stationary contact terminal block and the stationary contact are in a U-shape.

[0024] In one embodiment, the arc extinguishing chamber includes arc extinguishing grids, and the arc extinguishing grids include an upper arc extinguishing grid group and a lower arc extinguishing grid group. The upper arc extinguishing grid group is located in a spatial position extending from above the moving contact to the rear of the switch, and the lower arc extinguishing grid group is located in a spatial position behind and below the static contact.

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

[0026] In one embodiment, the static contact is connected to the lower arc-extinguishing grid group through the arc-striking plate 1, and the lower arc-extinguishing grid group is connected to the upper arc-extinguishing grid group through the arc-striking plate 2.

[0027] In one of the embodiments, the arc extinguishing chamber is in a 7-shape.

[0028] The invention discloses an isolating switch, comprising the above-mentioned structure in which the static contact terminal bank and the arc extinguishing chamber are arranged at the rear of the switch.

[0029] Beneficial Effects

[0030] The present invention provides a structure in which a static contact terminal row and an arc extinguishing chamber are arranged behind a switch, and the structure includes a housing, wherein a moving contact and a static contact are installed in the housing, and the engagement and separation of the moving contact and the static contact control the on and off of the isolating switch, and the arc generated when the moving contact and the static contact are disconnected enters the arc extinguishing chamber and is extinguished, and the static contact terminal row and the arc extinguishing chamber are staggeredly arranged at the rear side of the isolating switch. Without increasing the height of the isolating switch product, the space that can be occupied by the arc extinguishing chamber can be increased, so that more arc extinguishing grids can be arranged, thereby improving the breaking capacity of the isolating switch, and at the same time, the installation method of the isolating switch is not changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Attached Figure 1 is a product schematic diagram of Embodiment 1 of the present invention;

[0033] Attached Figure 2 It is a schematic diagram of the internal layout structure in Example 1 of the present invention;

[0034] Attached Figure 3 It is a structural schematic diagram of embodiment 1 of the present invention;

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

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

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

[0038] Attached Figure 7 is a product schematic diagram of Embodiment 2 of the present invention; DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 "disposed on" another component, it may be directly on the other component or there may also 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.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may 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 intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those 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 related listed items.

[0044] Example 1

[0045] In traditional frame circuit breakers or frame disconnectors, the arc extinguishing chamber is arranged above the moving contact and the stationary contact in the housing, and the wires are generally led out from the rear of the switch. This results in the space behind the arc extinguishing chamber and above the wiring bank not being effectively utilized, and it is impossible to arrange more arc extinguishing grids to extinguish the arc generated during disconnection. In order to solve this problem, as shown in the attached Figure 1 , 2 and 3, this embodiment provides a structure in which a static contact terminal row and an arc extinguishing chamber are arranged behind the switch, which includes a housing 1, wherein a moving contact 2 and a static contact 3 are installed in the housing 1, and the engagement and separation of the moving contact 2 and the static contact 3 control the on and off of the isolating switch, and the arc generated when the moving contact 2 and the static contact 3 are disconnected enters the arc extinguishing chamber 4 and is extinguished, wherein the static contact terminal row 5 and at least part of the arc extinguishing chamber 4 are behind the switch. In this way, without increasing the height of the isolating switch product, the space that can be occupied by the arc extinguishing chamber can be increased, thereby arranging more arc extinguishing grids, thereby improving the breaking capacity of the isolating switch, and at the same time, the installation method of the isolating switch is not changed.

[0046] As attached Figure 1As shown, the horizontal left and right arrows along the rear side of the switch are indicated as the first direction, the up and down arrows along the rear side of the switch are indicated as the second direction, and the front and back arrows along the rear side of the switch are indicated as the third direction. The projections of the static contact terminal row 5 and the arc extinguishing chamber 4 in the first direction at least partially overlap. The static contact terminal row 5 and the arc extinguishing chamber 4 are not aligned in the second direction, and the moving contact terminal row 8 and the arc extinguishing chamber 4 are aligned in the second direction. Specifically, as shown in the attached figure, Figure 1 As shown, in this embodiment, the static contact terminal row 5 is arranged on the same side of the arc extinguishing chamber 4. Figure 4 As shown, the static contact terminal wiring row 5 is integrated with the static contact 3. The static contact terminal wiring row 5 and the static contact 3 are in a U-shape.

[0047] As attached Figure 2 , 3 and 5, the arc extinguishing chamber 4 includes an arc extinguishing grid a, and the arc extinguishing grid a includes 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 a spatial position extending from above the moving contact 2 to the rear of the switch, and the lower arc extinguishing grid group a2 is located in a spatial position behind and below the static contact 3. Further, the lower arc extinguishing grid group a2 is located in a spatial position behind the static contact 3 and at least partially overlaps with the projection of the static contact 3 in the third direction.

[0048] As attached Figure 6 As shown, the static contact 3 is connected to the lower arc extinguishing grid group a2 through the arc striking plate 1 6, and the lower arc extinguishing grid group a2 is connected to the upper arc extinguishing grid group a1 through the arc striking plate 2 7. Figure 5 As shown, the arc extinguishing chamber 4 is in the shape of a 7. This structure of the arc extinguishing chamber fully utilizes the space increased after the positions of the static contacts and the moving contacts are changed.

[0049] Example 2

[0050] As attached Figure 7 As shown, the static contact terminal wiring row 5 is located on both sides of all the arc extinguishing chambers 4, forming another structure in which the static contact terminal wiring row 5 and the arc extinguishing chamber 4 are arranged behind the switch. The other structures are the same as those in the first embodiment.

[0051] This embodiment also provides a switch, and in particular, relates to a frame circuit breaker or a frame type isolating switch, including the above-mentioned structure in which the static contact terminal bank and the arc extinguishing chamber are arranged behind the switch.

[0052] The present invention can increase the space that can be occupied by the arc extinguishing chamber without increasing the height of the isolating switch product, so as to arrange more arc extinguishing grids, thereby improving the breaking capacity of the isolating switch, and at the same time, does not change the orientation of the isolating switch.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A structure in which a static contact terminal row and an arc extinguishing chamber are arranged behind a switch, comprising a housing (1), wherein a moving contact (2) and a static contact (3) are mounted in the housing (1), wherein the engagement and separation of the moving contact (2) and the static contact (3) control the on and off of the isolating switch, and an arc generated when the moving contact (2) and the static contact (3) are disconnected enters the arc extinguishing chamber (4) and is extinguished, characterized in that: The static contact terminal row (5) and at least part of the arc extinguishing chamber (4) are located behind the switch.

2. A structure in which the static contact terminal bank and the arc extinguishing chamber are arranged behind the switch as claimed in claim 1, characterized in that: The projections of the static contact terminal row (5) and the arc extinguishing chamber (4) in the first direction at least partially overlap.

3. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 1, characterized in that: The stationary contact terminal row (5) and the arc extinguishing chamber (4) are not aligned in the second direction.

4. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 1, characterized in that: The moving contact terminal row (8) and the arc extinguishing chamber (4) are aligned in the second direction.

5. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 1, characterized in that: The static contact terminal wiring row (5) is located on both sides of all the arc extinguishing chambers (4) as a whole.

6. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 1, characterized in that: The static contact terminal row (5) is arranged on the same side of the arc extinguishing chamber (4).

7. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 1, characterized in that: The stationary contact terminal row (5) is integrated with the stationary contact (3).

8. A structure in which the static contact terminal bank and the arc extinguishing chamber are arranged behind the switch as claimed in claim 7, characterized in that: The static contact terminal row (5) and the static contact (3) are in a U-shape.

9. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 1, characterized in that: The arc extinguishing chamber (4) comprises an arc extinguishing grid (a), the arc extinguishing grid (a) comprising an upper arc extinguishing grid group (a1) and a lower arc extinguishing grid group (a2), the upper arc extinguishing grid group (a1) being located in a spatial position extending from above the moving contact (2) to the rear of the switch, and the lower arc extinguishing grid group (a2) being located in a spatial position behind and downward of the stationary contact (3).

10. A structure in which the static contact terminal bank and the arc extinguishing chamber are arranged behind the switch as claimed in claim 9, characterized in that: The lower arc-extinguishing grid group (a2) is located in a spatial position behind the stationary contact (3) and at least partially overlaps with a projection of the stationary contact (3) in a third direction.

11. A structure in which the static contact terminal bank and the arc extinguishing chamber are arranged behind the switch as claimed in claim 9, characterized in that: The static contact (3) is connected to the lower arc extinguishing grid group (a2) through the arc striking plate 1 (6), and the lower arc extinguishing grid group (a2) is connected to the upper arc extinguishing grid group (a1) through the arc striking plate 2 (7).

12. The structure of the static contact terminal bank and the arc extinguishing chamber arranged behind the switch according to claim 9, characterized in that: The arc extinguishing chamber (4) is in a 7-shape.

13. A switch, characterized in that: The invention comprises a structure in which the static contact terminal bank and the arc extinguishing chamber as described in any one of claims 1 to 12 are arranged behind the switch.

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