CN210722796U

CN210722796U - Switching mechanism of dual-power switch

Info

Publication number: CN210722796U
Application number: CN201922007250.9U
Authority: CN
Inventors: 赖焕生; 段颉颃; 范登帅; 林榕; 童晨垚
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-06-09
Anticipated expiration: 2029-11-20

Abstract

Provided is a switching mechanism of a dual-power switch. The main running angle turned angle undersize that solves present dual power switch's moving contact leads to the not good problem of arc extinguishing effect. The method is characterized in that: the first power supply assembly comprises a first fixed contact (11), the second power supply assembly comprises a second fixed contact (21), the rotating member is arranged between the first fixed contact and the second fixed contact, and an included angle c formed by a straight line a where an axis is located when the moving contact is in contact with the first fixed contact and a straight line b where the axis is located when the moving contact is in contact with the second fixed contact is larger than 180 degrees. The utility model provides a dual power switch's shifter, moving contact and one of them static contact separation back need rotate great angle and just can be connected with another static contact to guarantee that electric arc can be elongated as far as, play good arc extinguishing effect.

Description

Switching mechanism of dual-power switch

Technical Field

The utility model relates to a dual switch field, concretely relates to dual switch's shifter.

Background

The dual-power switch is used as the core of an emergency standby power supply system, is used for realizing automatic and reliable conversion between a common power supply and a standby power supply, and is commonly used in important occasions such as nuclear power, docks, hospitals and the like. When the common power supply has problems, the connection between the common power supply and the load is cut off through a manual operation or a control system, the standby power supply and the load are quickly connected, and the connection between the load and the standby power supply is cut off through the manual operation or the control system after the common power supply is cleared, so that the common power supply and the load are connected.

However, the moving contact of the existing dual-power switch has an excessively small operating angle (generally less than 100 °), which results in poor arc extinguishing effect.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of background art, the utility model provides a dual switch's shifter mainly solves the running angle turned angle undersize of present dual switch's moving contact, leads to the not good problem of arc extinguishing effect.

The utility model adopts the technical proposal that:

the switching mechanism of the dual-power switch comprises a first power supply assembly, a second power supply assembly and a rotating part, wherein a moving contact is arranged on the rotating part, the first power supply assembly comprises a first fixed contact, the second power supply assembly comprises a second fixed contact, the rotating part is arranged between the first fixed contact and the second fixed contact, and an included angle c formed by a straight line a where an axis is located when the moving contact is in contact with the first fixed contact and a straight line b where the axis is located when the moving contact is in contact with the second fixed contact is larger than 180 degrees.

The arc extinguishing device is characterized by further comprising an arc extinguishing cover, wherein a plurality of arc extinguishing grid pieces are arranged in the arc extinguishing cover, and each arc extinguishing grid piece comprises a first grid piece and a second grid piece, the first grid pieces are correspondingly arranged on the outer side of the first fixed contact, and the second grid pieces are correspondingly arranged on the outer side of the second fixed contact.

The middle end of the arc extinguishing cover is provided with a hollow groove, the cross section of the hollow groove is a sector annular surface, and the central angle of the hollow groove is 70-90 degrees.

The first static contact comprises a clamp body, a clamp groove used for clamping the moving contact is formed in the clamp body, the first static contact further comprises a clamping sleeve with elasticity, the clamping sleeve comprises a first clamping plate and a second clamping plate, and two sides of the clamp body are clamped by the first clamping plate and the second clamping plate to be folded in the clamp groove.

The clamping sleeve further comprises a bottom plate, and the bottom of the clamping body is in contact with the upper end face of the bottom plate.

The moving contact is connected with the output terminal through flexible connection.

The rotating part comprises an eccentric part, and the moving contact is arranged on the eccentric part.

The cross section of the rotating part is an elliptical surface.

The arc extinguishing grid pieces are axially arranged to form a U-shaped groove, and the first fixed contact is arranged in the U-shaped groove.

The energy storage device comprises a support, wherein a first limiting plate, a second limiting plate and a rotating ring in linkage connection with the rotating piece are arranged on the support, the first limiting plate and the second limiting plate are hinged and matched with the support, the energy storage device also comprises an energy storage elastic energy storage piece, one end of the elastic energy storage piece is connected with the first limiting plate, and the other end of the elastic energy storage piece is connected with the second limiting plate and used for tensioning the first limiting plate and the second limiting plate to enable the first limiting plate and the second limiting plate to be pressed against the outer walls of the two sides of the rotating ring;

when the moving contact is contacted with the first fixed contact, the two sides of the rotating ring are stressed in a balanced and static state;

when the moving contact leaves the first fixed contact, the elastic energy storage part releases energy to push the rotating ring to rotate through the first limiting plate and the second limiting plate.

The side face of the first limiting plate is provided with a containing groove, and one end of the rotating ring extends into the containing groove and is in abutting press fit with the inner wall of the containing groove.

The utility model has the advantages that: the utility model provides a dual power switch's shifter, moving contact and one of them static contact separation back need rotate great angle and just can be connected with another static contact to guarantee that electric arc can be elongated as far as, play good arc extinguishing effect.

Drawings

Fig. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of a first fixed contact according to an embodiment of the present invention.

Figure 3 is a schematic view of an arc chute according to an embodiment of the present invention.

Fig. 4 is a schematic partial structure diagram of an embodiment of the present invention.

Fig. 5 is a schematic view of an energy storage mechanism according to an embodiment of the present invention.

Fig. 6 is a schematic top view of the first limiting plate according to an embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings: as shown in the figure, the switching mechanism of the dual power switch comprises a first power supply assembly 1, a second power supply assembly 2 and a rotating member 3, wherein a moving contact 31 is arranged on the rotating member, the first power supply assembly comprises a first fixed contact 11, the second power supply assembly comprises a second fixed contact 21, the rotating member is arranged between the first fixed contact and the second fixed contact, and an included angle c formed by a straight line a where an axis is located when the moving contact is in contact with the first fixed contact and a straight line b where the axis is located when the moving contact is in contact with the second fixed contact is larger than 180 °.

Referring to fig. 1, the power supply apparatus includes a second power supply terminal 91, the second power supply terminal is connected to a second static contact through a flexible connection line, the rotating member can be a rotating shaft and is driven by a motor to rotate so as to switch between two power supplies, the first and second static contacts are on the same side through a flexible connection design, the power supply apparatus is convenient to install and use, and after a moving contact is separated from one of the static contacts, the moving contact needs to rotate by a large angle to be connected to the other static contact, so that an arc can be elongated as much as possible, and a good arc extinguishing effect is achieved.

In this embodiment, as shown in the figure, the arc extinguishing apparatus further includes an arc extinguishing chamber 4, a plurality of arc extinguishing grids 41 are disposed in the arc extinguishing chamber, and each arc extinguishing grid includes a first grid 411 correspondingly disposed on an outer side of the first fixed contact and a second grid 412 correspondingly disposed on an outer side of the second fixed contact. The arc extinguishing cover is integrally designed, the structure is compact, arc extinguishing grid pieces are arranged at the positions corresponding to the first static contact and the second static contact, and the arc extinguishing effect is improved.

In this embodiment, as shown in the figure, the arc-extinguishing chamber is provided with a hollow groove at the middle end, the cross section of the hollow groove is a sector annular surface, and the central angle of the hollow groove is 70-90 °. There is no arc-extinguishing grid piece in the middle part (empty slot) of the arc-extinguishing cover, thus ensuring that short circuit caused by too long arc can not occur during arc extinguishing, and simultaneously, the central angle of the arc-extinguishing cover can reach more than 180 degrees, ensuring that the arc-extinguishing cover is long enough, thereby effectively extinguishing arc.

In this embodiment, as shown in the figure, the first fixed contact includes a clip body 110, a clip groove 111 for clamping the movable contact is disposed on the clip body, and the first fixed contact further includes a jacket 5 having elasticity, the jacket includes a first clip plate 51 and a second clip plate 52, and the first clip plate and the second clip plate clamp two sides of the clip body to close the clip groove. The first static contact is sleeved with a jacket, and the jacket is used for drawing the clamping groove to clamp the moving contact, so that the contact reliability is ensured.

In this embodiment, as shown in the figure, the jacket further includes a bottom plate, and the bottom of the clamp body is in contact with the upper end face of the bottom plate. The both sides of bottom plate are equipped with first splint and second splint, and whole is triangle-shaped, and is more firm.

In this embodiment, as shown in the figure, the device further includes an output terminal 61, and the movable contact is connected with the output terminal through a flexible connection 62. The single-arm rotating contact is connected with the output end through a flexible wire, so that the structure of the single-arm rotating contact is extremely simple, and the rotating resistance is low and the rotating speed is high.

In the present embodiment, as shown in the figure, the rotating component includes an eccentric portion 31, and the movable contact is disposed on the eccentric portion.

In this embodiment, the cross-section of the rotating member is an elliptical surface, as shown. By adopting the oval design, the reliable installation of the moving contact can be ensured, the length of the flexible wire which is stretched or compressed when the flexible wire rotates can be reduced, and the reliability of flexible connection is improved.

In this embodiment, as shown in the figure, a plurality of arc chute plates are axially arranged to form a U-shaped groove 413, and the first stationary contact is disposed in the U-shaped groove. Similarly, the second static contact is also arranged in the U-shaped groove, so that the arc extinguishing effect is improved.

In this embodiment, as shown in the figure, the energy storage device further includes an energy storage mechanism, the energy storage mechanism includes a support 7, the support is provided with a first limiting plate 71, a second limiting plate 72 and a rotating ring 74 linked with the rotating member, the first limiting plate and the second limiting plate are both hinged and matched with the support, the energy storage device further includes an energy storage elastic energy storage member 73, one end of the elastic energy storage member is connected with the first limiting plate, and the other end of the elastic energy storage member is connected with the second limiting plate and used for tensioning the first limiting plate and the second limiting plate so that the first limiting plate and the second limiting plate are pressed against outer walls of two sides of the rotating ring; when the moving contact is contacted with the first fixed contact, the two sides of the rotating ring are stressed in a balanced and static state; when the moving contact leaves the first fixed contact, the elastic energy storage part releases energy to push the rotating ring to rotate through the first limiting plate and the second limiting plate.

When being in the combined floodgate state, the moving contact contacts with first static contact, first limiting plate and second limiting plate push down the both sides at the rotating ring under the effect of elastic energy storage spare (preferred extension spring) this moment, at this moment, the both sides of rotating ring can be for the equal opposite direction of atress size, also can be for its atress to be radial direction, the rotation axis that the atress direction passes through the rotating ring promptly, thus, the rotating ring also can not rotate, as preferred, the rotating ring is the rectangle, when separating brake, motor 92 drives the pivot and rotates (clockwise anticlockwise all can a little), the atress is not balanced this moment, the rotating ring rotates fast under the promotion of first limiting plate and second limiting plate, reach the effect of quick separating brake, thereby play the purpose of high-efficient arc extinguishing. The rotating ring can be welded on the rotating part or connected on the rotating ring through a screw, and the rotating part can be driven to rotate by pushing the rotating ring.

In this embodiment, as shown in the figure, the side surface of the first limiting plate is provided with an accommodating groove 711, and one end of the rotating ring extends into the accommodating groove and is in press fit with the inner wall of the accommodating groove. The width of this rotating ring and the width clearance fit of holding tank make rotating ring axial direction play spacing effect, move more steadily.

Preferably, the second stopper plate and the first stopper plate have the same structure.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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

The embodiments described with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.

Claims

1. Double power switch's shifter, including first power supply module (1), second power supply module (2) and rotation piece (3), be equipped with moving contact (31), its characterized in that on the rotation piece: the first power supply assembly comprises a first fixed contact (11), the second power supply assembly comprises a second fixed contact (21), the rotating member is arranged between the first fixed contact and the second fixed contact, and an included angle c formed by a straight line a where an axis is located when the moving contact is in contact with the first fixed contact and a straight line b where the axis is located when the moving contact is in contact with the second fixed contact is larger than 180 degrees.

2. The dual power switch transfer mechanism of claim 1, wherein: the arc extinguishing device is characterized by further comprising an arc extinguishing cover (4), wherein a plurality of arc extinguishing grid pieces (41) are arranged in the arc extinguishing cover, and each arc extinguishing grid piece comprises a first grid piece (411) and a second grid piece (412), the first grid pieces are correspondingly arranged on the outer side of the first fixed contact, and the second grid pieces are correspondingly arranged on the outer side of the second fixed contact.

3. The dual power switch transfer mechanism of claim 2, wherein: the middle end of the arc extinguishing cover is provided with a hollow groove, the cross section of the hollow groove is a sector annular surface, and the central angle of the hollow groove is 70-90 degrees.

4. The dual power switch transfer mechanism of claim 1, wherein: the first static contact comprises a clamp body (110), a clamp groove (111) used for clamping the moving contact is formed in the clamp body, the first static contact further comprises a clamping sleeve (5) with elasticity, the clamping sleeve comprises a first clamping plate (51) and a second clamping plate (52), and two sides of the clamp body are clamped by the first clamping plate and the second clamping plate so as to be folded in the clamp groove.

5. The dual power switch transfer mechanism of claim 4, wherein: the clamping sleeve further comprises a bottom plate, and the bottom of the clamping body is in contact with the upper end face of the bottom plate.

6. The dual power switch transfer mechanism of claim 1, wherein: the moving contact is connected with the output terminal through a flexible connection (62).

7. The dual power switch transfer mechanism of claim 1, wherein: the rotating piece comprises an eccentric part (32), and the moving contact is arranged on the eccentric part.

8. The dual power switch transfer mechanism of claim 2, wherein: the arc extinguishing grid pieces are axially arranged to form a U-shaped groove (413), and the first fixed contact is arranged in the U-shaped groove.

9. The dual power switch transfer mechanism of claim 1, wherein: the energy storage device is characterized by further comprising an energy storage mechanism, wherein the energy storage mechanism comprises a support (7), a first limiting plate (71), a second limiting plate (72) and a rotating ring (74) which is in linkage connection with the rotating piece are arranged on the support, the first limiting plate and the second limiting plate are both in hinged fit with the support, the energy storage device also comprises an energy storage elastic energy storage piece (73), one end of the elastic energy storage piece is connected with the first limiting plate, and the other end of the elastic energy storage piece is connected with the second limiting plate and used for tensioning the first limiting plate and the second limiting plate to enable the first limiting plate and the second limiting plate to be pressed against the outer walls of the two sides of the;

10. The dual power switch transfer mechanism of claim 9, wherein: the side of the first limiting plate is provided with a containing groove (711), and one end of the rotating ring extends into the containing groove and is abutted to the inner wall of the containing groove in a press fit mode.