Switching mechanism of dual power switch

Abstract

A conversion mechanism for a dual power switch. It primarily addresses the problem that the current operating angle of the moving contact of a dual power switch is too small, resulting in poor arc extinguishing effect. It is characterized in that: the first power component includes a first static contact (11), the second power component includes a second static contact (21), the rotating member is disposed between the first static contact and the second static contact, and the angle c formed by the straight line a on which the axis of the moving contact contacts the first static contact when in contact with the straight line b on which the axis of the moving contact contacts the second static contact when in contact is greater than 180°. The present invention provides a conversion mechanism for a dual power switch, wherein after the moving contact is separated from one of the static contacts, it needs to rotate a larger angle before it can connect with the other static contact, thereby ensuring that the arc can be stretched as much as possible, achieving a good arc extinguishing effect.

Description

Technical Field

[0001] The present invention relates to the field of dual power switches, and in particular to a conversion mechanism of a dual power switch. Background Art

[0002] Dual power switches, the core of emergency backup power systems, are used to automatically and reliably switch between primary and backup power sources. They are commonly used in critical applications such as nuclear power plants, docks, and hospitals. When a problem with the primary power source occurs, the connection between the primary power source and the load is disconnected manually or through a control system, while the backup power source and the load are quickly connected. Once the primary power source fault is resolved, the load is disconnected from the backup power source manually or through a control system, and the primary power source and load are connected.

[0003] However, the operating angle of the moving contact of the current dual power switch is too small (usually less than 100°), resulting in poor arc extinguishing effect. Summary of the Invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a conversion mechanism for a dual power switch, which mainly solves the problem that the operating angle and rotation angle of the movable contact of the current dual power switch are too small, resulting in poor arc extinguishing effect.

[0005] The technical solution adopted in the present invention is:

[0006] The conversion mechanism of the dual power switch includes a first power supply component, a second power supply component and a rotating part, the rotating part is provided with a moving contact, the first power supply component includes a first static contact, the second power supply component includes a second static contact, the rotating part is arranged between the first static contact and the second static contact, and the angle c formed by the straight line a where the axis of the moving contact contacts the first static contact is located and the straight line b where the axis of the moving contact contacts the second static contact is located is greater than 180°.

[0007] It also includes an arc extinguishing cover, in which a plurality of arc extinguishing grids are arranged. The arc extinguishing grids include a first grid corresponding to the outer side of the first static contact and a second grid corresponding to the outer side of the second static contact.

[0008] An empty slot is provided at the middle end of the arc extinguishing cover, and the cross section of the empty slot is a sector ring surface with a central angle of 70° to 90°.

[0009] The first static contact includes a clamping body, which is provided with a clamping groove for clamping the moving contact, and also includes an elastic sleeve, which includes a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate clamp both sides of the clamping body to close the clamping groove.

[0010] The jacket further includes a bottom plate, and the bottom of the clamp body contacts the upper end surface of the bottom plate.

[0011] It also includes an output terminal terminal, and the movable contact is connected to the output terminal terminal through a flexible connection.

[0012] The rotating member includes an eccentric portion, and the moving contact is arranged on the eccentric portion.

[0013] The cross section of the rotating member is an elliptical surface.

[0014] A plurality of arc-extinguishing grids are axially arranged to form a U-shaped groove, and the first static contact is arranged in the U-shaped groove.

[0015] The device further includes an energy storage mechanism, the energy storage mechanism including a bracket, the bracket being provided with a first limit plate, a second limit plate and a rotating ring linked to the rotating member, the first limit plate and the second limit plate being hingedly engaged with the bracket, and further including an energy storage elastic energy storage member, one end of the elastic energy storage member being connected to the first limit plate and the other end being connected to the second limit plate for tightening the first limit plate and the second limit plate so that the first limit plate and the second limit plate are pressed against the outer walls of both sides of the rotating ring;

[0016] When the moving contact contacts the first static contact, the forces on both sides of the rotating ring are balanced and the rotating ring is in a stationary state;

[0017] When the moving contact leaves the first static contact, the elastic energy storage member releases energy to push the rotating ring to rotate through the first limiting plate and the second limiting plate.

[0018] A receiving groove is provided on the side surface of the first limiting plate, and one end of the rotating ring extends into the receiving groove and is pressed and fitted with the inner wall of the receiving groove.

[0019] The beneficial effect of the present invention is that the present invention provides a conversion mechanism for a dual power switch. After the moving contact is separated from one of the static contacts, it needs to rotate a larger angle to connect with the other static contact, thereby ensuring that the arc can be stretched as much as possible and achieving a good arc extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of a first static contact according to an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of an arc extinguishing hood according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the local structure of an embodiment of the present invention.

[0024] Figure 5Schematic diagram of an energy storage mechanism according to an embodiment of the present invention.

[0025] Figure 6 Schematic top view of a first limiting plate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings: As shown in the figure, the conversion mechanism of the dual power switch includes a first power supply component 1, a second power supply component 2 and a rotating member 3, the rotating member is provided with a moving contact 31, the first power supply component includes a first static contact 11, the second power supply component includes a second static contact 21, the rotating member is arranged between the first static contact and the second static contact, and the angle c formed by the straight line a where the axis of the moving contact is in contact with the first static contact and the straight line b where the axis of the moving contact is in contact with the second static contact is greater than 180°.

[0027] See also Figure 1 The second power terminal 91 is included, and the second power terminal is connected to the second static contact through a flexible connecting line. The rotating part can be a rotating shaft and is driven by a motor to rotate to realize the switching of the two power supplies. The flexible wire connection design allows the first and second static contacts to be on the same side, which is convenient for installation and use. After the moving contact is separated from one of the static contacts, it needs to be rotated at a larger angle to connect with the other static contact, thereby ensuring that the arc can be stretched as much as possible and achieving a good arc extinguishing effect.

[0028] In this embodiment, as shown in the figure, an arc-quenching hood 4 is further included. Within the arc-quenching hood are several arc-quenching grids 41, including a first grid 411 positioned outside the first static contact and a second grid 412 positioned outside the second static contact. The arc-quenching hood is an integrated design with a compact structure. Arc-quenching grids are positioned corresponding to the first and second static contacts to enhance arc extinguishing effectiveness.

[0029] In this embodiment, as shown in the figure, a slot is provided at the middle end of the arc chute. The slot has a sector-shaped cross-section and a central angle of 70° to 90°. There are no arc-quenching grids in the middle portion (the slot) of the arc chute, thereby preventing a short circuit caused by an excessively long arc during arc extinguishing. Furthermore, the central angle of the arc chute can reach over 180°, ensuring the chute is sufficiently long for effective arc extinguishing.

[0030] In this embodiment, as shown in the figure, the first stationary contact includes a clamping body 110, which is provided with a clamping groove 111 for clamping the moving contact. It also includes a resilient jacket 5, which includes a first clamping plate 51 and a second clamping plate 52. The first and second clamping plates clamp the sides of the clamping body to close the clamping groove. The jacket is covered with a jacket, which closes the clamping groove and clamps the moving contact to ensure contact reliability.

[0031] In this embodiment, as shown in the figure, the jacket further comprises a bottom plate, the bottom of the clamp body contacts the upper end surface of the bottom plate, and a first clamping plate and a second clamping plate are provided on both sides of the bottom plate, forming a triangle as a whole, which is more stable.

[0032] In this embodiment, as shown in the figure, an output terminal terminal 61 is also included, and the movable contact is connected to the output terminal terminal via a flexible connection 62. The single-arm rotating contact is connected to the output terminal via a flexible wire, making the single-arm rotating contact structure extremely simple, achieving low rotation resistance and high rotation speed.

[0033] In this embodiment, as shown in the figure, the rotating member includes an eccentric portion 31, and the moving contact is provided on the eccentric portion.

[0034] In this embodiment, as shown in the figure, the cross section of the rotating member is an elliptical surface. The elliptical design can not only ensure the reliable installation of the moving contact, but also reduce the length of the flexible wire that is stretched or compressed during rotation, thereby improving the reliability of the flexible connection.

[0035] In this embodiment, as shown in the figure, a plurality of arc extinguishing grids are axially arranged to form a U-shaped groove 413, and the first static contact is disposed in the U-shaped groove. Similarly, the second static contact is also disposed in the U-shaped groove to enhance the arc extinguishing effect.

[0036] In this embodiment, as shown in the figure, it also includes an energy storage mechanism, which includes a bracket 7, on which a first limit plate 71, a second limit plate 72 and a rotating ring 74 linked to the rotating member are provided. The first limit plate and the second limit plate are both hingedly cooperated with the bracket, and also includes an energy storage elastic energy storage member 73, one end of the elastic energy storage member is connected to the first limit plate, and the other end is connected to the second limit plate for tightening the first limit plate and the second limit plate so that the first limit plate and the second limit plate are pressed against the outer walls of the rotating ring on both sides; when the moving contact contacts the first static contact, the forces on both sides of the rotating ring are balanced and in a stationary state; when the moving contact leaves the first static contact, the elastic energy storage member releases energy to push the rotating ring to rotate through the first limit plate and the second limit plate.

[0037] When in the closed state, the moving contact contacts the first static contact. At this time, the first limit plate and the second limit plate are pressed on both sides of the rotating ring under the action of the elastic energy storage member (preferably a tension spring). At this time, the two sides of the rotating ring can be subjected to equal forces in opposite directions, or they can be subjected to radial forces, that is, the force direction passes through the rotating axis of the rotating ring. In this way, the rotating ring will not rotate. Preferably, the rotating ring is rectangular. When the circuit breaker is opened, the motor 92 drives the rotating shaft to rotate slightly (clockwise or counterclockwise). At this time, the force is not balanced, and the rotating ring rotates rapidly under the push of the first limit plate and the second limit plate, achieving the effect of rapid opening, thereby achieving the purpose of efficient arc extinguishing. The rotating ring can be welded to the rotating part or screwed to the rotating ring. The rotating part can be driven to rotate by pushing the rotating ring.

[0038] In this embodiment, as shown in the figure, a receiving groove 711 is provided on the side of the first limiting plate. One end of the rotating ring extends into the receiving groove and presses against the inner wall of the receiving groove. The width of the rotating ring and the width of the receiving groove are loosely matched, so that the rotating ring has an axial limiting effect, and the operation is more stable.

[0039] Preferably, the second limiting plate has the same structure as the first limiting plate.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be construed as limiting the present invention, but any improvements based on the spirit of the present invention should fall within the scope of protection of the present invention.

Claims

1. A switching mechanism for a dual power switch, comprising a first power assembly (1), a second power assembly (2) and a rotating member (3), wherein the rotating member is provided with a moving contact (31), and characterized in that: The first power supply assembly includes a first static contact (11), the second power supply assembly includes a second static contact (21), the rotating member is arranged between the first static contact and the second static contact, and an angle c formed by a straight line a on which the axis of the moving contact contacts the first static contact and a straight line b on which the axis of the moving contact contacts the second static contact is greater than 180°; The invention also includes an energy storage mechanism, wherein the energy storage mechanism includes a bracket (7), the bracket is provided with a first limit plate (71), a second limit plate (72) and a rotating ring (74) linked to the rotating member, the first limit plate and the second limit plate are both hingedly matched with the bracket, and further includes an energy storage elastic energy storage member (73), one end of the elastic energy storage member is connected to the first limit plate, and the other end is connected to the second limit plate for tightening the first limit plate and the second limit plate so that the first limit plate and the second limit plate are pressed against the outer walls of the rotating ring on both sides; When the moving contact contacts the first static contact, the forces on both sides of the rotating ring are balanced and the rotating ring is in a stationary state; When the moving contact leaves the first static contact, the elastic energy storage member releases energy to push the rotating ring to rotate through the first limiting plate and the second limiting plate.

2. The dual power switch conversion mechanism according to claim 1, characterized in that: The invention also comprises an arc extinguishing hood (4), wherein a plurality of arc extinguishing grids (41) are arranged in the arc extinguishing hood, and the arc extinguishing grids include a first grid (411) correspondingly arranged on the outside of the first static contact and a second grid (412) correspondingly arranged on the outside of the second static contact.

3. The dual power switch conversion mechanism according to claim 2, characterized in that: An empty slot is provided at the middle end of the arc extinguishing cover. The cross section of the empty slot is a sector ring surface with a central angle of 70° to 90°.

4. The dual power switch conversion mechanism according to claim 1, characterized in that: The first static contact comprises a clamping body (110), the clamping body being provided with a clamping groove (111) for clamping the moving contact, and an elastic clamping sleeve (5), the clamping sleeve comprising a first clamping plate (51) and a second clamping plate (52), the first clamping plate and the second clamping plate clamping two sides of the clamping body to close the clamping groove.

5. The dual power switch conversion mechanism according to claim 4, characterized in that: The jacket further includes a bottom plate, and the bottom of the clamp body contacts the upper end surface of the bottom plate.

6. The dual power switch conversion mechanism according to claim 1, characterized in that: It also includes an output terminal terminal (61), and the movable contact is connected to the output terminal terminal via a soft connection (62).

7. The dual power switch conversion mechanism according to claim 1, characterized in that: The rotating member comprises an eccentric portion (32), and the moving contact is arranged on the eccentric portion.

8. The dual power switch conversion mechanism according to claim 2, characterized in that: A plurality of arc-extinguishing grids are axially arranged to form a U-shaped groove (413), and the first static contact is arranged in the U-shaped groove.

9. The dual power switch conversion mechanism according to claim 1, characterized in that: A receiving groove (711) is provided on the side of the first limiting plate, and one end of the rotating ring extends into the receiving groove and presses against the inner wall of the receiving groove.

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