CN214226810U

CN214226810U - Permanent magnet type arc extinguishing structure of rotary isolating switch and rotary isolating switch

Info

Publication number: CN214226810U
Application number: CN202022705683.4U
Authority: CN
Inventors: 常杨; 龚祚勇; 韩伟; 彭琼; 连云飞
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-09-17
Anticipated expiration: 2030-11-20

Abstract

The utility model provides a rotary isolating switch's permanent magnet formula arc extinguishing structure and this rotation type isolating switch, permanent magnet formula arc extinguishing structure includes moving contact subassembly (1) and static contact subassembly (2), be equipped with permanent magnet group (3), its characterized in that on moving contact subassembly (1) around self axis direction pivoted orbit: the permanent magnet group (3) comprises at least one pair of permanent magnets (301,301 '), the N poles of the pair of permanent magnets (301,301 ') are arranged oppositely, and arcs generated when the moving contact assembly (1) is connected with or disconnected from the fixed contact assembly (2) can be discharged from corresponding air outlets on the mounting shell (4) on the track of the moving contact assembly (1) which is arranged in parallel with the pair of permanent magnets (301,301 ') and rotates around the axis direction of the moving contact assembly. Through improving the position structure of the permanent magnet, the electric arc is stretched by the permanent magnet, so that the arc column is lengthened, the arc voltage is increased, and the arc extinguishing time is shortened to accelerate the arc extinguishing.

Description

Permanent magnet type arc extinguishing structure of rotary isolating switch and rotary isolating switch

Technical Field

The invention belongs to the technical field of rotary isolating switches, and particularly relates to a permanent magnet type arc extinguishing structure of a rotary isolating switch and the rotary isolating switch.

Background

In existing photovoltaic systems, rotary disconnectors are typically utilized for the purpose of individually isolating, protecting and disconnecting each photovoltaic cell. At present, a common rotary isolating switch for a photovoltaic system comprises an operating mechanism and a plurality of contact modules, wherein the structure of the contact modules determines the arc extinguishing effect of the isolating switch, the existing contact modules can generate arc discharge when a moving contact component and a static contact component of the rotary isolating switch are jointed or separated, the arc is a gas discharge phenomenon, and the rotary isolating switch has two characteristics: firstly, the electric arc has a large amount of electrons and ions, so the electric arc is conductive, the electric arc is not extinguished, the circuit is continuously conducted, and the circuit is formally disconnected after the electric arc is extinguished; secondly, the temperature of the electric arc is very high, the temperature of the arc core reaches thousands of degrees centigrade, the high-temperature electric arc can burn out equipment to cause serious accidents, so measures must be taken to rapidly extinguish the electric arc.

In order to achieve the purpose of rapidly extinguishing the arc, one conventional way is to arrange a permanent magnet on the contact side of a moving contact and a fixed contact of the rotary isolating switch, and accelerate the moving speed of the arc by using the magnetic field of the permanent magnet to discharge the arc out of the rotary isolating switch, chinese patent 201811585109.0 discloses a direct current large current breaking device, which comprises a base, the fixed contact is mounted on the base, a moving contact is mounted on a moving contact support, the moving contact support is mounted on the base, and a plane where the moving contact and the fixed contact are connected and broken is a breaking plane, and is characterized in that: the permanent magnet mounting bracket is provided with a pair of permanent magnets, the permanent magnets are arranged above and below the disjunction plane respectively, the opposite surfaces of the permanent magnets have the same polarity, and the magnetizing directions of the permanent magnets are vertical to the disjunction plane. The technical scheme can not only realize the non-polar function, but also save the installation space and the permanent magnet material, and also reduce the product cost on the premise of ensuring the function. But the translational motion type moving and static contact structure can achieve the effect of compressing and cooling the electric arc without a rotary type moving and static contact structure, the electric arc rotates at a high speed on the arc track, and the arc extinguishing effect of the translational motion type moving and static contact is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not good technical defect of arc extinguishing effect to above-mentioned current permanent magnet formula isolator, provide a rotary isolating switch's permanent magnet formula arc extinguishing structure and this rotation type isolator, improve the position structure of permanent magnet, electric arc is through the permanent magnet drawing, makes the arc post elongate, and the arc pressure risees, reduces the arcing time and accelerates to extinguish electric arc.

Technical scheme

In order to realize above-mentioned technical purpose, the utility model provides a pair of rotary isolating switch's permanent magnet formula arc extinguishing structure, it includes moving contact subassembly and static contact subassembly, the moving contact subassembly rotate the in-process around self axis direction can with the static contact subassembly joint or throw off, the moving contact subassembly is equipped with permanent magnet group, its characterized in that on self axis direction pivoted orbit: the permanent magnet group comprises at least one pair of permanent magnets, the N poles of the permanent magnets are arranged oppositely, and the moving contact component arranged in parallel can discharge electric arcs generated when the moving contact component is jointed with or separated from the fixed contact component from a corresponding air outlet on the mounting shell on the track of the moving contact component rotating around the axis direction of the moving contact component.

Furthermore, the plane of the permanent magnet group is parallel to the plane of the moving contact component rotating around the axis direction of the moving contact component.

Further, the at least one pair of permanent magnets are in the shape of a long arc.

Further, the at least one pair of permanent magnets are mounted in permanent magnet mounting slots in the mounting housing

Furthermore, the moving contact assembly is installed in a moving contact assembly installation groove on the installation shell, and the fixed contact assembly is installed in a fixed contact installation groove on the installation shell and is located on the outer side of the moving contact assembly.

Furthermore, the permanent magnet components are arranged in permanent magnet mounting grooves on two sides of a central shaft of the mounting shell, so that electric arcs generated when the moving contact component is connected with or disconnected from the fixed contact component can be subjected to electromagnetic force pushing towards the outer side of the mounting shell.

The utility model also provides a rotation type isolator, including operating device, operating device is in the same place with at least one contact module dress, and foretell permanent magnet formula arc extinguishing structure is located in the contact module, operating device's handle passes through connecting piece control the contact module, the connecting piece passes the movable contact subassembly in at least one contact module and the mounting hole of installation casing make the movable contact subassembly of at least one contact module link mutually.

Advantageous effects

The utility model provides a pair of rotary isolating switch's permanent magnet formula arc extinguishing structure and this rotation type isolator improves the position structure of permanent magnet, and electric arc is through the permanent magnet drawing, makes the arc post elongate, and the arc is pressed and is rised, reduces the arcing time and accelerates to extinguish electric arc.

Drawings

Fig. 1 is a schematic view of a rotary isolating switch product in an embodiment of the present invention.

Fig. 2 is a front view of the rotary isolating switch in the embodiment of the present invention.

Fig. 3 is an exploded view of the rotary isolating switch according to the embodiment of the present invention.

Fig. 4a is a schematic diagram of a top contact module according to an embodiment of the present invention.

Fig. 4b is a schematic diagram of the upper contact module according to the embodiment of the present invention.

Fig. 5a is a schematic view of a lower contact module according to an embodiment of the present invention.

Fig. 5b is a schematic diagram of a lower contact module according to an embodiment of the present invention.

Fig. 6 is a schematic position diagram of a permanent magnet group in an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a permanent magnet group in an embodiment of the present invention.

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 "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which 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" and "connected" are to be interpreted 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.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

As shown in fig. 1, 2 and 3, a rotary isolating switch comprises an operating mechanism C, wherein the operating mechanism C is assembled with at least one contact module, a handle C1 of the operating mechanism C controls the contact module through a connecting piece 5, and the connecting piece 5 passes through a movable contact assembly 1 in the at least one contact module and a mounting hole of a mounting shell 4 to enable the movable contact assembly 1 of the at least one contact module to be linked.

This embodiment takes as an example 2 contact modules, which comprise an upper contact module a as shown in fig. 4a and 4b and a lower contact module 3 as shown in fig. 5a and 5b, wherein in the upper contact module a: the fixed contact assembly 2 comprises a fixed contact assembly A2a and a fixed contact assembly II A2b, the moving contact assembly 1 comprises a moving contact assembly A1a, the connecting piece 5 comprises a connecting piece I5 a, and the mounting shell 4 comprises a mounting shell I4 a; in the lower contact module B, a static contact assembly 2 comprises a static contact assembly three B2c and a static contact assembly four B2d, a moving contact assembly 1 comprises a moving contact assembly two B1B, a connecting piece 5 comprises a connecting piece two 5B, and an installation shell 4 comprises an installation shell two 4B; as shown in fig. 6, 2 permanent magnet groups 3 are placed in each of the upper contact module a and the lower contact module B. The permanent magnet group 3 is arranged in the permanent magnet mounting grooves 401 at two sides of the central axis of the mounting shell 4, and the permanent magnet group 3 can enable the electric arc generated when the moving contact component 1 is jointed with or separated from the static contact component 2 to be subjected to the electromagnetic force pushing towards the outer side of the mounting shell 4.

As shown in fig. 4a and 4B, the first static contact assembly A2a, the third static contact assembly B2c, the second static contact assembly A2B, and the fourth static contact assembly B2d are arranged in a mirror image manner with ZZ' as an axis, the upper and lower permanent magnet groups 3 in the upper and lower contact modules a and B are arranged in a crisscross manner in an upper and lower layer, the upper and lower contact modules a and B and a load circuit are connected in a certain manner, and a handle in an operating mechanism is rotated to complete a normal switching and switching circuit.

In further detail, the moving contact assembly 1 is installed in a moving contact assembly installation groove 402 on the installation housing 4, and the fixed contact assembly 2 is installed in a fixed contact installation groove 403 on the installation housing 4 and is located outside the moving contact assembly 1. The moving contact component 1 can be jointed with or separated from the static contact component 2 in the process of rotating around the self axis direction, and a permanent magnet group 3 is arranged on the track of the moving contact component 1 rotating around the self axis direction. As shown in fig. 7, in this embodiment, the permanent magnet group 3 includes at least one pair of permanent magnets 301,301 ', N poles of the pair of permanent magnets 301,301 ' are opposite to each other, and an arc generated when the movable contact assembly 1 is engaged with or disengaged from the fixed contact assembly 2 can be discharged from a corresponding air outlet on the mounting housing 4 on a trajectory of the movable contact assembly 1, which is placed in parallel with the pair of permanent magnets 301,301 ', rotating around its axis direction. The plane of the permanent magnet group 3 is parallel to the plane of the moving contact component 1 rotating around the axis direction. The at least one pair of permanent magnets 301,301' are elongated arcs. The at least one pair of permanent magnets 301,301' are mounted in permanent magnet mounting slots 401 in the mounting housing 4. When the main circuit is powered on, the handle C1 is rotated, as shown in fig. 4a and 4b, at this time, in the upper contact module a, an arc A1 and an arc b2 are respectively generated between the moving contact assembly A1a and the fixed contact assembly A2a and the fixed contact assembly b 2b, the arc A1 and the arc b2 are compressed by the permanent magnet assembly 3, when the moving contact assembly A1a moves to a final stop position, the arc A1 is discharged to the outside of the isolating switch from the air outlet a3 and the air outlet b 4, and the arc b2 is discharged to the outside of the isolating switch from the air outlet three a5 and the air outlet four a6, so that the arc is finally broken, and the protection of the line is completed.

While the handle C1 is rotating, as shown in fig. 5a and 5B, in the lower contact module B, an arc three B1 and an arc four B2 are respectively generated between the moving contact assembly two B1B and the fixed contact assembly three B2C and the fixed contact assembly four B2d, and the arc three B1 and the arc four B2 are compressed by the permanent magnet assembly 3. When the moving contact assembly II B1B moves to the final stop position, the arc III B1 is discharged from the air outlet V B3, the arc IV B2 is discharged from the air outlet V B5 to the outside of the isolating switch, and finally the circuit is protected by breaking the arc.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. Rotatory isolator's permanent magnet formula arc extinguishing structure, it includes moving contact subassembly (1) and static contact subassembly (2), moving contact subassembly (1) rotate the in-process around self axis direction can with static contact subassembly (2) joint or throw off, moving contact subassembly (1) is equipped with permanent magnet group (3) on the orbit of self axis direction pivoted, its characterized in that: the permanent magnet group (3) comprises at least one pair of permanent magnets (301,301 '), the N poles of the pair of permanent magnets (301,301 ') are arranged oppositely, and arcs generated when the moving contact assembly (1) is connected with or disconnected from the fixed contact assembly (2) can be discharged from corresponding air outlets on the mounting shell (4) on the track of the moving contact assembly (1) which is arranged in parallel with the pair of permanent magnets (301,301 ') and rotates around the axis direction of the moving contact assembly.

2. The permanent magnet arc extinguishing structure of the rotary isolating switch according to claim 1, wherein: the plane of the permanent magnet group (3) is parallel to the plane of the moving contact component (1) rotating around the axis direction.

3. The permanent magnet arc extinguishing structure of the rotary isolating switch according to claim 1, wherein: the at least one pair of permanent magnets (301,301') is in the shape of an elongated arc.

4. The permanent magnet arc extinguishing structure of the rotary isolating switch according to claim 1, wherein: the at least one pair of permanent magnets (301,301') is mounted in a permanent magnet mounting slot (401) in the mounting housing (4).

5. The permanent magnet arc extinguishing structure of the rotary isolating switch according to claim 1, wherein: the moving contact component (1) is arranged in a moving contact component mounting groove (402) on the mounting shell (4), and the static contact component (2) is arranged in a static contact mounting groove (403) on the mounting shell (4) and is positioned at the outer side of the moving contact component (1).

6. The permanent magnet arc extinguishing structure of the rotary isolating switch according to claim 1, wherein: the permanent magnet group (3) is separated in permanent magnet mounting grooves (401) on two sides of the central shaft of the mounting shell (4), so that electric arcs generated when the movable contact assembly (1) is jointed with or separated from the fixed contact assembly (2) can be subjected to electromagnetic force pushing towards the outer side of the mounting shell (4).

7. A rotary disconnector comprising an operating mechanism (C) associated with at least one contact module in which a permanent-magnet arc extinguishing structure according to any one of claims 1 to 6 is located, a handle (C1) of said operating mechanism (C) controlling said contact module via a connecting member (5), said connecting member (5) passing through a mounting hole of a mounting housing (4) and a moving contact assembly (1) of said at least one contact module for interlocking said moving contact assembly (1) of said at least one contact module.