CN215008043U - Contact system of isolating switch - Google Patents

Abstract

The utility model provides a isolator's contact system, include: the contact module body is provided with a moving contact and a static contact which can be in contact connection or disconnection; the static contact is provided with a first connecting plate and a second connecting plate which are connected in a bending mode and have opposite current directions, wherein the opening and closing disconnection positions of the moving contact and the static contact are located between the first connecting plate and the arc extinguish chamber, and the second connecting plate is located on one side, far away from the arc extinguish chamber, of the first connecting plate. When the circuit breaker is switched off, electric arcs can be generated between the moving contact and the static contact, the magnetic field directions generated by the first connecting plate and the second connecting plate below the electric arcs are the same, the magnetic field directions generated above the electric arcs are opposite, namely the synthetic magnetic fluxes of the upper side and the lower side of the electric arcs are unequal, and the lower side is larger than the upper side, so that strong electromagnetic force can be generated to blow the electric arcs to the arc extinguish chamber, the electric arcs can be extinguished quickly, and the arc extinguish effect is good.

Description

Contact system of isolating switch

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to isolator's contact system.

Background

The isolating switch is used for preventing or allowing current to flow in a power-on state, realizes reliable isolation of a power-off part and a charged part in a power distribution device, and is widely applied to power systems such as photovoltaic power systems, wind power systems and the like.

The contact system of the isolating switch comprises a moving contact and a fixed contact, the moving contact and the fixed contact can generate electric arcs when being disconnected, the electric arcs can damage components, and therefore the performance of the isolating switch is seriously affected, but the arc extinguishing effect of the existing isolating switch is general.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the general defect of isolator arc extinguishing effect among the prior art to a effectual isolator's of arc extinguishing contact system is provided.

Therefore, the utility model provides a contact system of an isolating switch, which comprises a contact module body, wherein a moving contact and a static contact which can be contacted and connected or disconnected are arranged on the contact module body; the static contact is provided with a first connecting plate and a second connecting plate which are connected in a bending mode and have opposite current directions, wherein the opening and closing positions of the moving contact and the static contact are located between the first connecting plate and the arc extinguish chamber, and the second connecting plate is located on one side, far away from the arc extinguish chamber, of the first connecting plate.

The first connecting plate and the second connecting plate are bent into a U shape.

The static contact is provided with a first static contact board and a second static contact board, wherein the second static contact board is communicated with the movable contact in a contact way before the first static contact board when the static contact is switched on; and when the brake is switched off, the second static contact plate is separated and disconnected from the moving contact after the first static contact plate.

The moving contact is provided with a first moving contact board and a second moving contact board, wherein the second moving contact board is communicated with the fixed contact in a contact manner before the first moving contact board when the switch is switched on; and when the switch is switched off, the second movable contact board is separated and disconnected from the fixed contact after the first movable contact board.

The length of the second fixed contact plate is longer than that of the first fixed contact plate, the length of the second movable contact plate is longer than that of the first movable contact plate, the second movable contact plate can be in contact connection with or disconnected from the second fixed contact plate, and the first movable contact plate can be in contact connection with or disconnected from the first fixed contact plate; when the switch is switched on, the second movable contact plate is firstly in contact communication with the second fixed contact plate, and the first movable contact plate is then in contact communication with the first fixed contact plate; when the switch is switched off, the second movable contact plate is separated and disconnected from the second fixed contact plate, and the first movable contact plate is separated and disconnected from the first fixed contact plate.

First static contact board is located perpendicularly one side of first connecting plate, the static contact board of second is L shape, L shape the horizontal plate of the static contact board of second with second connecting plate fixed connection, vertical plate with be equipped with the clearance between the first static contact board, just the plane at riser portion place with the plane at first static contact board place sets up perpendicularly.

The vertical plate portion extends to the inside of the arc extinguishing chamber.

The magnetic increasing sheet is fixed between the transverse plate part and the second connecting plate.

The movable contact module is characterized in that a movable contact frame is rotatably mounted in the contact module body, the movable contact frame is provided with two movable contacts which are respectively arranged on two sides of a rotation center of the movable contact frame, the fixed contact and the arc extinguishing chamber are correspondingly provided with two fixed contacts, and the rotation angle of the movable contact frame is 0-110 degrees.

The cross section of the contact module body is square.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an isolator's contact system, the separating brake open position of moving contact and static contact is in between first connecting plate and the explosion chamber, the second connecting plate is located one side that the explosion chamber was kept away from to first connecting plate, and the electric current opposite direction of first connecting plate and second connecting plate, when the circuit breaker divides absolutely, move, can produce electric arc between the static contact, the magnetic field direction that first connecting plate and second connecting plate produced in the electric arc below is the same, the magnetic field opposite direction who produces above electric arc, also be the synthetic magnetic flux inequality of both sides about the electric arc, the downside is greater than the upside, can produce strong electromagnetic force like this and blow electric arc to the explosion chamber, thereby be favorable to extinguishing electric arc fast, the arc extinguishing is effectual.

2. The utility model provides a contact system of isolating switch, the static contact has first static contact board and second static contact board, wherein, when closing a floodgate, second static contact board contacts with the moving contact and communicates earlier than first static contact board; when separating brake, the second static contact plate is separated and disconnected with the moving contact in the first static contact plate, so that the electric arc is only generated between the second static contact plate and the moving contact, and the first static contact plate is far away from the electric arc, so that the first static contact plate is used as a main static contact, is not easy to be corroded by the electric arc, and prolongs the service life.

3. The utility model provides a contact system of isolating switch, moving contact have first moving contact board and second moving contact board, wherein, when closing a floodgate, second moving contact board contacts with the static contact before first moving contact board and communicates; when the switch is switched off, the second movable contact plate is separated and disconnected from the fixed contact behind the first movable contact plate, so that electric arc is only generated between the second movable contact plate and the fixed contact.

4. The utility model provides an isolator's contact system, the length of the quiet contact board of second is longer than the length of first quiet contact board, and the length of second movable contact board is longer than the length of first movable contact board, and second movable contact board can communicate or break off with the contact of the quiet contact board of second, and first movable contact board can communicate or break off with the contact of first quiet contact board. Therefore, the electric arc is only generated between the second movable contact plate and the second static contact plate, and the first movable contact plate and the first static contact plate are far away from the electric arc, so that the movable contact plate and the first static contact plate are respectively used as a driving contact and a main static contact, are not easy to be corroded by the electric arc, and prolong the service life.

5. The utility model provides an isolator's contact system, moving contact frame's turned angle is 0-110, moves like this, the static contact between open a distance great, has improved disconnected ability, and the cross section of contact module body is the square, and moving contact frame rotates around the center of contact module body, the effectual space that has utilized like this.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the isolating switch of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a schematic view of a contact module;

fig. 4 is an exploded schematic view of the moving contact holder, moving contact and stationary contact;

fig. 5 is a schematic view of the assembly of the moving contact holder and the moving contact;

FIG. 6 is an exploded view of FIG. 5;

fig. 7 is a perspective view of a stationary contact;

fig. 8 is an exploded view of a static contact;

FIG. 9 is a perspective view of the operating module;

FIG. 10 is a perspective view of the manually operated mechanism;

FIG. 11 is a perspective view of the transmission;

FIG. 12 is a perspective view of the turntable support;

FIG. 13 is a perspective view of FIG. 11 with the turntable support top plate removed;

FIG. 14 is an exploded view of the first spindle and turntable assembly;

FIG. 15 is another perspective view of FIG. 13 rotated through an angle;

FIG. 16 is an assembled view of the energy storage kick assembly;

fig. 17 is an exploded view of the energy storage snap-through assembly.

Description of reference numerals: 1. a contact module; 10. a contact module body; 11. a moving contact; 113. a first movable contact plate; 114. a second movable contact plate; 12. static contact; 121. a first connecting plate; 122. a second connecting plate; 123. a first stationary contact plate; 124. a second stationary contact plate; 1241. a lateral plate portion; 1242. a vertical plate portion; 13. an arc extinguishing chamber; 14. a magnetism increasing sheet; 15. a movable contact head frame; 16. a second main shaft; 17. a bevel gear; 2. an operation module; 20. an operating module body; 21. an operating handle; 22. a first main shaft; 221. a square shaft section; 222. a circular shaft section; 23. a first clutch gear; 24. a fluted disc; 3. a motor; 31. a power take-off shaft; 32. a second clutch gear; 4. an energy storage kick assembly; 41. a first mounting shaft; 42. a movable plate; 43. a strip hole; 44. mounting grooves; 45. a spring; 46. a stopper; 5. a turntable assembly; 50. a turntable support; 501. a top plate; 502. a base plate; 503. an arc-shaped hole; 51. a first turntable; 52. a second turntable; 53. a movable groove; 54. a second mounting shaft; 55. a limiting groove; 56. a limiting block; 57. a third mounting shaft; 6. an indicating component; 61. a switch-on/off button.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The embodiment provides a two-in two-out dc 1500V disconnector, which includes two contact modules 1 and an operation module 2, as shown in fig. 1 and 2.

The two contact modules 1 are arranged side by side with the operation module 2, and the modules are assembled through fasteners, the contact module 1 comprises a contact module body 10 and a contact assembly arranged in the contact module body 10, the contact assembly comprises a moving contact 11 and a fixed contact 12, and in the embodiment, the fasteners are pins or rivets.

The contact module comprises a contact module body 10, wherein a movable contact frame 15 rotating around the center of the contact module body is arranged in the contact module body, the movable contact frame 15 is provided with two movable contacts 11 respectively arranged at two sides of the rotating center of the movable contact frame, the number of the fixed contacts 12 is two corresponding to that of the arc extinguish chamber 13, the rotating angle of the movable contact frame 15 is 0-110 degrees, so that the distance between the movable contacts and the fixed contacts is large, and the breaking capacity is improved.

As shown in fig. 4, 7 and 8, the static contact 12 has a first connecting plate 121 and a second connecting plate 122 that are connected in a bent manner and have opposite current directions, wherein the opening/closing position of the dynamic contact 11 and the static contact 12 is located between the first connecting plate 121 and the arc-extinguishing chamber 13, and the second connecting plate 122 is located on a side of the first connecting plate 121 away from the arc-extinguishing chamber 13. In this embodiment, the first connecting plate 121 and the second connecting plate 122 are bent into a U shape.

As shown in fig. 7, the fixed contact 12 further includes a first fixed contact plate 123 and a second fixed contact plate 124, the length of the second fixed contact plate 124 is longer than that of the first fixed contact plate 123, the first fixed contact plate 123 is vertically disposed on one side of the first connecting plate 121, the second fixed contact plate 124 is L-shaped, a transverse plate portion 1241 of the L-shaped second fixed contact plate 124 is fixedly connected to the second connecting plate 122, a gap is disposed between a vertical plate portion 1242 and the first fixed contact plate 123, a plane where the vertical plate portion 1242 is located is vertically disposed with a plane where the first fixed contact plate 123 is located, the vertical plate portion 1242 extends into the arc extinguish chamber 13, and the magnetizing strip 14 is disposed between the transverse plate portion 1241 and the second connecting plate 122, so as to blow an electric arc to the arc extinguish chamber 13.

As shown in fig. 4 to 6, the movable contact 11 has two first movable contact plates 113 arranged in a left-right symmetrical manner and two second movable contact plates 114 arranged in a left-right symmetrical manner, the two first movable contact plates 113 are arranged between the two second movable contact plates 114, and the length of the second movable contact plates 114 is longer than that of the first movable contact plates 113. When the switch is closed, as shown in fig. 4, the movable contact holder 15 rotates clockwise, the second movable contact plate 114 first contacts and communicates with the second fixed contact plate 124, and the first movable contact plate 113 then contacts and communicates with the first fixed contact plate 123; during switching off, the second movable contact board 114 is separated from the second fixed contact board 124 first, and the first movable contact board 113 is separated from the first fixed contact board 123 later. In this embodiment, only the first movable contact board 113 and the first fixed contact board 123 are provided with contacts, and the above-described structural arrangement enables an arc to be generated only between the second movable contact board 114 and the second fixed contact board 124, and since the first movable contact board 113 and the first fixed contact board 123 are arranged away from the arc, the first movable contact board 113 and the first fixed contact board 123 are respectively used as a main contact and a main fixed contact, the contacts are not easily ablated by the arc, and the service life is prolonged.

As an alternative embodiment, the static contact 12 has a first static contact plate 123 and a second static contact plate 124, wherein, when closing, the second static contact plate 124 is in contact communication with the movable contact 11 before the first static contact plate 123; during opening, the second stationary contact plate 124 is separated from the movable contact 11 after the first stationary contact plate 123.

As an alternative embodiment, the movable contact 11 has a first movable contact board 113 and a second movable contact board 114, wherein, when closing, the second movable contact board 114 is in contact communication with the fixed contact 12 before the first movable contact board 113; when the switch is opened, the second movable contact plate 114 is separated from the fixed contact 12 after the first movable contact plate 113.

The operation module 2 comprises an operation module body 20, a manual operation mechanism, an electric operation mechanism and an indication assembly 6.

The operating module comprises an operating module body 20, an operating handle 21 and a transmission mechanism are arranged on the operating module body, and the operating handle 21 drives the moving contact mechanism to open or close through the transmission mechanism.

As shown in fig. 9, the electric operating mechanism includes a motor 3, a power output shaft 31 provided at one end of the motor 3, and a second clutch gear 32 interlocked with the power output shaft 31, wherein the second clutch gear 32 has incomplete teeth, and the second clutch gear 32 has a first state engaged with the first clutch gear 23 and a second state disengaged therefrom.

The manual operating mechanism, as shown in fig. 10, includes an operating handle 21, a transmission mechanism, and an energy storage kick assembly 4.

The transmission mechanism comprises a first main shaft 22, a second main shaft 16, a gear transmission assembly and a turntable assembly 5.

The first main shaft 22 is vertically arranged on the operation module body 20 and can be driven by the operation handle 21 to rotate, as shown in fig. 14, the first main shaft 22 comprises a square shaft section 221 and a round shaft section 222, a square hole matched with the square shaft section 221 is formed in the middle of the first rotary disc 51, and a round hole matched with the round shaft section 222 is formed in the middle of the second rotary disc 52; and the second main shaft 16 is horizontally arranged on the contact module body 10, and two movable contact frames 15 are arranged on the second main shaft 16. The first main shaft 22 is fixedly provided with a first clutch gear 23 linked with the first main shaft, and the first clutch gear 23 is provided with incomplete teeth.

A gear assembly disposed between the first main shaft 22 and the second main shaft 16 and adapted to convert the rotation of the first main shaft 22 into a driving force for driving the second main shaft 16 to rotate, as shown in fig. 10, the gear assembly includes: a fluted disc 24 fixed on the first main shaft 22 and capable of rotating along with the first main shaft in a linkage manner; and the bevel gear 17 is fixedly arranged on the second main shaft 16 and can rotate in a linkage manner, and the bevel gear 17 is meshed and connected with the fluted disc 24. When the operating handle 21 rotates by 90 degrees, the bevel gear 17 can enable the contact mechanism to rotate by an angle larger than 90 degrees, so that large stroke of the moving contact and the static contact is realized, and arc extinguishing capability is improved.

And the turntable assembly 5 is provided with the second mounting shaft 54 and can be driven by the first main shaft 22 to rotate. As shown in fig. 11-14, the turntable assembly 5 includes a first turntable 51 and a second turntable 52. The first rotating disk 51 is fixed on the first main shaft 22, and has two movable grooves 53 or movable holes symmetrically arranged on two sides of the rotation center thereof, and a limit groove 55 arranged between the two movable grooves 53. Two second rotating discs 52 rotatably mounted on the first main shaft 22, and having the second mounting shafts 54 capable of extending into the movable slots 53 and moving relative thereto; before the energy-storing snap-jump assembly 4 moves to the extreme compression position, one side wall of the movable groove 53 of the first rotating disc 51 is abutted against the second mounting shaft 54 and drives the second rotating disc 52 to rotate; energy storage kick subassembly 4 moves to after the extreme compression position, energy storage kick subassembly 4 drives second installation axle 54 is followed one side motion to the opposite side of activity groove 53, utility model people is through ingenious activity groove 53 and the installation axle 54 that sets up to realized the linkage and the separation of first carousel 51 and second carousel 52, had simple structure, low in production cost's advantage. As shown in fig. 12, the operation module body 20 is provided with a turntable support 50, the turntable support 50 includes a top plate 501 and a bottom plate 502 which are arranged up and down, the top plate 501 and the bottom plate 502 are both provided with arc-shaped holes 503 for the second mounting shafts 54 to extend out and move, two second turntables 52 which are arranged up and down are arranged between the top plate 501 and the bottom plate 502, the two second turntables 52 are fixedly connected with the two third mounting shafts 57 through the two second mounting shafts 54 which are circumferentially distributed at intervals, and the top plate 501 is provided with a limit block 56 which is matched with the limit groove 55.

And the energy storage snap-through component 4 is arranged on the transmission mechanism and is provided with an extreme compression position, an energy storage state before moving to the extreme compression position and an energy release state after moving to the extreme compression position and driving the transmission mechanism to rapidly act. Before the energy storage snap-through assembly 4 moves to the extreme compression position, the turntable assembly 5 and the operating handle 21 are kept in a linkage state; after the energy storage snap-through assembly 4 moves to the limit compression position, the turntable assembly 5 and the operating handle 21 are kept in a separated state, so that the position of the operating handle 21 is kept unchanged when the energy storage snap-through assembly 4 acts rapidly, the hands of an operator cannot be accidentally injured, and the safety performance is improved.

The energy storage snap-through assembly 4, as shown in fig. 15 to 17, includes: a first mounting shaft 41 fixed to the operation module body 20; the second mounting shaft 54 is mounted on the operation module body 20 and connected with the operation handle 21, and the second mounting shaft 54 is driven by the operation handle 21 and can move along an arc track; a movable plate 42, one end of which is provided with a strip hole 43 for the first mounting shaft 41 to pass through and allowing the movable plate 42 to move laterally relative to the first mounting shaft 41, and the other end of which is provided with a mounting groove 44 or a mounting hole for the second mounting shaft 54 to pass through and rotate in linkage with the same; and a spring 45 sleeved on the movable plate 42, wherein one end of the spring 45 abuts against the first mounting shaft 41, the other end of the spring abuts against the second mounting shaft 54 or a stop 46 formed at the end of the movable plate 42, and when the second mounting shaft 54 moves to be closest to the first mounting shaft 41, the spring 45 is in the limit compression position.

And the device also comprises a switching-on and switching-off button 61 for controlling the motor 3 to work.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. A contact system for a disconnector, comprising:

the contact module comprises a contact module body (10) which is provided with a movable contact (11) and a fixed contact (12) which can be contacted and connected or disconnected;

the static contact (12) is provided with a first connecting plate (121) and a second connecting plate (122) which are connected in a bending mode and have opposite current directions, wherein the opening and closing positions of the moving contact (11) and the static contact (12) are located between the first connecting plate (121) and the arc extinguish chamber (13), and the second connecting plate (122) is located on one side, far away from the arc extinguish chamber (13), of the first connecting plate (121).

2. Contact system of a disconnector according to claim 1, characterized in that the first connecting plate (121) and the second connecting plate (122) are bent in a U-shape.

3. The contact system of the disconnector according to claim 1 or 2, characterized in that the stationary contact (12) has a first stationary contact plate (123) and a second stationary contact plate (124), wherein, upon closing, the second stationary contact plate (124) is in contact communication with the movable contact (11) before the first stationary contact plate (123); during opening, the second static contact plate (124) is separated from the movable contact (11) and disconnected after the first static contact plate (123).

4. The contact system of the disconnector according to claim 3, characterized in that the movable contact (11) has a first movable contact plate (113) and a second movable contact plate (114), wherein, upon closing, the second movable contact plate (114) is in contact communication with the stationary contact (12) before the first movable contact plate (113); and when the switch is switched off, the second movable contact board (114) is separated and disconnected from the fixed contact (12) after the first movable contact board (113).

5. The contact system of the isolating switch according to claim 4, characterized in that the length of the second fixed contact plate (124) is longer than that of the first fixed contact plate (123), the length of the second movable contact plate (114) is longer than that of the first movable contact plate (113), and the second movable contact plate (114) can be in contact connection with or disconnected from the second fixed contact plate (124), and the first movable contact plate (113) can be in contact connection with or disconnected from the first fixed contact plate (123);

when the switch is switched on, the second movable contact board (114) is firstly in contact communication with the second fixed contact board (124), and the first movable contact board (113) is then in contact communication with the first fixed contact board (123);

when the switch is opened, the second movable contact board (114) is separated and disconnected from the second fixed contact board (124) firstly, and the first movable contact board (113) is separated and disconnected from the first fixed contact board (123) later.

6. The contact system of the isolating switch according to claim 5, wherein the first stationary contact plate (123) is vertically arranged on one side of the first connecting plate (121), the second stationary contact plate (124) is L-shaped, a transverse plate portion (1241) of the L-shaped second stationary contact plate (124) is fixedly connected with the second connecting plate (122), a gap is arranged between a vertical plate portion (1242) and the first stationary contact plate (123), and a plane where the vertical plate portion (1242) is arranged is vertically arranged with a plane where the first stationary contact plate (123) is arranged.

7. Contact system of a disconnector according to claim 6, characterized in that the vertical plate part (1242) extends inside the extinguishing chamber (13).

8. Contact system of a disconnector according to claim 6 or 7, characterized in that it further comprises a magnetizing sheet (14) fixed between the cross-plate portion (1241) and the second connecting plate (122).

9. The contact system of the isolating switch according to claim 1, wherein a moving contact frame (15) is rotatably mounted in the contact module body (10), the moving contact frame (15) has two moving contacts (11) respectively disposed at two sides of a rotation center thereof, and there are two corresponding fixed contacts (12) and two corresponding arc extinguishing chambers (13), wherein a rotation angle of the moving contact frame (15) is 0-110 °.

10. Contact system of a disconnector according to claim 1, characterized in that the contact module body (10) is square in cross-section.

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