Isolating switch

Abstract

The utility model provides an isolating switch, which comprises a switch shell, a contact mechanism and an arc extinguish chamber, the contact mechanism and the arc extinguish chamber are arranged in the switch shell, the contact mechanism comprises a static contact and a moving contact rotatably mounted on the switch shell, the isolating switch further comprises an exhaust structure arranged in the switch shell, the exhaust structure is provided with an exhaust port communicated with the outside, and the arc extinguish chamber is arranged in the switch shell. The static contact, the arc extinguish chamber and the exhaust structure are arranged on the same side of the moving track of the moving contact and are sequentially arranged in the direction, away from the static contact, of the moving contact. Therefore, the exhaust structure is close to the arc extinguish chamber, hot gas can be exhausted through the exhaust structure more quickly, and the safety performance is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to an isolating switch. Background Art

[0002] The isolating switch includes a switch housing, a moving contact, a static contact and an arc extinguishing chamber. An arc will be generated when the moving contact and the static contact are disconnected. Since many parts in the housing are made of plastic, hot gas will be generated under the action of the arc. If the gas increases rapidly, the housing will explode due to excessive internal air pressure, affecting equipment and personal safety. Utility Model Content

[0003] To this end, the utility model provides an isolating switch, including a switch housing, and a contact mechanism and an arc extinguishing chamber arranged in the switch housing, the contact mechanism including a static contact and a moving contact rotatably mounted on the switch housing, and also including an exhaust structure arranged in the switch housing, the exhaust structure having an exhaust port connected to the outside, wherein the static contact, the arc extinguishing chamber and the exhaust structure, the arc extinguishing chamber and the exhaust structure are arranged on the same side of the moving trajectory of the moving contact, and the arc extinguishing chamber and the exhaust structure are arranged sequentially along the direction in which the moving contact moves away from the static contact.

[0004] The exhaust structure has an air inlet and an exhaust channel connecting the air inlet and the exhaust port, and the exhaust channel is Z-shaped.

[0005] The air inlet is in a trumpet shape.

[0006] The arc extinguishing chamber includes an arc extinguishing grid assembly and a magnet assembly. The arc extinguishing grid assembly is composed of a plurality of arc extinguishing grids with a certain interval and connected by insulating plates to form an integral structure. The arc extinguishing grid has an open groove. The magnet assembly is arranged in the open groove and can generate a magnetic field force that drives the arc to move toward the arc extinguishing grid.

[0007] The magnet assembly comprises an insulating sleeve and a permanent magnet arranged in the insulating sleeve, wherein the insulating sleeve is suitable for separating the permanent magnet and the arc-extinguishing grid.

[0008] A limiting structure is provided between the insulating sleeve and the arc-extinguishing grid, and the limiting structure comprises a limiting groove provided on the arc-extinguishing grid, and a limiting rib provided on the outer wall of the insulating sleeve and adaptively connected to the limiting groove.

[0009] The bottom of the insulating sleeve is provided with an insertion hole for inserting the permanent magnet.

[0010] The technical solution of the utility model has the following advantages:

[0011] 1. The isolating switch provided by the utility model has an exhaust structure with an exhaust port connected to the outside, wherein the static contact, the arc extinguishing chamber and the exhaust structure are arranged on the same side of the moving track of the moving contact, and the arc extinguishing chamber and the exhaust structure are arranged in sequence along the direction in which the moving contact is away from the static contact, so that the hot gas can be discharged faster through the exhaust structure, thereby ensuring safety performance.

[0012] 2. The isolating switch provided by the utility model has an exhaust passage in a Z shape, so that the residual arc will not be directly discharged from the shell, which is safer.

[0013] 3. The disconnector provided by the utility model has an arc extinguishing chamber comprising an arc extinguishing grid assembly and a magnet assembly. The magnet assembly can generate a magnetic field force that drives the arc to move toward the arc extinguishing grid, thereby facilitating improving the arc extinguishing effect.

[0014] 4. The isolating switch provided by the utility model has an insertion hole for inserting a permanent magnet at the bottom of the insulating sleeve, and a limiting structure is provided between the insulating sleeve and the arc extinguishing grid. The limiting structure includes a limiting groove provided on the arc extinguishing grid, and a limiting rib provided on the outer wall of the insulating sleeve and adapted to be connected with the limiting groove. During assembly, the magnet is first installed in the insulating sleeve, and then the limiting rib of the magnet assembly is installed in the corresponding limiting groove, and finally the module formed by the arc extinguishing grid assembly and the magnet assembly is installed in the switch housing, so that the assembly is quick and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the isolating switch of the utility model;

[0017] Figure 2 This is a schematic diagram of the explosion structure of the isolating switch;

[0018] Figure 3 It is a three-dimensional diagram of the arc extinguishing chamber;

[0019] Figure 4 It is a structural schematic diagram of the arc extinguishing grid;

[0020] Figure 5 Schematic diagram of the explosion structure of the insulating sleeve and the permanent magnet.

[0021] Explanation of the accompanying drawings: 1. switch housing; 2. arc extinguishing chamber; 3. static contact; 4. moving contact; 5. air inlet; 6. exhaust port; 7. exhaust channel; 8. limiting groove; 9. arc extinguishing grid assembly; 10. magnet assembly; 11. arc extinguishing grid; 12. insulating plate; 13. open groove; 14. insulating sleeve; 15. permanent magnet; 16. limiting rib; 17. socket; 18. contact frame. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example

[0027] This embodiment provides an isolating switch, such as Figure 1 As shown, it includes a switch housing 1, and a contact mechanism, an arc extinguishing chamber 2 and an exhaust structure arranged in the switch housing 1.

[0028] Contact mechanism, such as Figure 1 and Figure 2As shown, it includes two stationary contacts 3 and a moving contact assembly rotatably mounted on the switch housing 1 , the moving contact assembly includes a contact frame 18 and moving contacts 4 arranged on both sides of the contact frame 18 and corresponding to the stationary contacts 3 .

[0029] The exhaust structure is arranged in the switch housing 1, such as Figure 1 As shown, it has an air inlet 5, an exhaust port 6 connected to the outside, and an exhaust channel 7 connecting the air inlet 5 and the exhaust port 6. In this embodiment, the exhaust channel 7 is Z-shaped, and the air inlet 5 is trumpet-shaped. The static contact 3, the arc extinguishing chamber 2 and the exhaust structure are arranged on the same side of the moving track of the moving contact 4, and the arc extinguishing chamber 2 and the exhaust structure are arranged in sequence along the direction in which the moving contact 4 is away from the static contact 3, that is, the arc extinguishing chamber 2 is arranged between the static contact 3 and the exhaust structure, and the exhaust structure is close to the corner position of the switch housing 1.

[0030] Arc extinguishing chamber 2, such as Figure 3 As shown, it includes an arc extinguishing grid assembly 9 and a magnet assembly 10. The arc extinguishing grid assembly 9 is composed of a plurality of arc extinguishing grids 11 with a certain interval, and is connected by an insulating plate 12 to form an integral structure. Figure 4 As shown, the arc extinguishing grid 11 has an open slot 13, and the magnet assembly 10 is arranged in the open slot 13 and can generate a magnetic field force that drives the arc to move toward the arc extinguishing grid 11. The magnet assembly includes an insulating sleeve 14 and a permanent magnet 15 arranged in the insulating sleeve 14, and the insulating sleeve 14 is suitable for separating the permanent magnet 15 from the arc extinguishing grid 11. A limiting structure is provided between the insulating sleeve 14 and the arc extinguishing grid 11, such as Figure 5 As shown, the limiting structure includes a limiting groove 8 provided on the arc extinguishing grid 11, and a limiting rib 16 provided on the outer wall of the insulating sleeve 14 and adapted to be connected with the limiting groove 8. The bottom of the insulating sleeve 14 is provided with a plug hole 17 for the permanent magnet 15 to be inserted.

[0031] The isolating switch provided by the utility model has an exhaust structure with an exhaust port 6 connected to the outside, wherein the arc extinguishing chamber and the exhaust structure are arranged on the same side of the moving track of the moving contact, and are arranged in sequence along the direction of the moving contact away from the static contact, so that the hot gas can be discharged faster through the exhaust structure, thereby ensuring safety performance.

[0032] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An isolating switch, comprising a switch housing (1), and a contact mechanism and an arc extinguishing chamber (2) arranged in the switch housing (1), wherein the contact mechanism comprises a stationary contact (3) and a moving contact (4) rotatably mounted on the switch housing (1), characterized in that: The invention also comprises an exhaust structure arranged in the switch housing (1), the exhaust structure having an exhaust port (6) connected to the outside, wherein the stationary contact (3), the arc extinguishing chamber (2) and the exhaust structure are arranged on the same side of the moving track of the moving contact (4), and the arc extinguishing chamber (2) and the exhaust structure are arranged in sequence along the direction in which the moving contact (4) is away from the stationary contact (3).

2. The isolating switch according to claim 1, characterized in that: The exhaust structure comprises an air inlet (5) and an exhaust channel (7) connecting the air inlet (5) and the exhaust port (6), wherein the exhaust channel (7) is in a Z shape.

3. The isolating switch according to claim 2, characterized in that: The air inlet (5) is in a bell-mouth shape.

4. The isolating switch according to claim 1, characterized in that: The arc extinguishing chamber (2) comprises an arc extinguishing grid assembly (9) and a magnet assembly (10); the arc extinguishing grid assembly (9) is composed of a plurality of arc extinguishing grids (11) with a certain interval and connected by an insulating plate (12) to form an integral structure; the arc extinguishing grid (11) has an open groove (13); the magnet assembly (10) is arranged in the open groove (13) and is capable of generating a magnetic field force that drives an electric arc to move toward the arc extinguishing grid (11).

5. The isolating switch according to claim 4, characterized in that: The magnet assembly (10) comprises an insulating sleeve (14) and a permanent magnet (15) arranged in the insulating sleeve (14), wherein the insulating sleeve (14) is suitable for separating the permanent magnet (15) from the arc-extinguishing grid (11).

6. The isolating switch according to claim 5, characterized in that: A limiting structure is provided between the insulating sleeve (14) and the arc-extinguishing grid (11), the limiting structure comprising a limiting groove (8) provided on the arc-extinguishing grid (11), and a limiting rib (16) provided on the outer wall of the insulating sleeve (14) and adaptively connected to the limiting groove (8).

7. The isolating switch according to claim 5, characterized in that: The bottom of the insulating sleeve (14) is provided with an insertion hole (17) for inserting the permanent magnet (15).

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