CN220106349U

CN220106349U - Isolating switch for magnetic blowout

Info

Publication number: CN220106349U
Application number: CN202321401721.4U
Authority: CN
Inventors: 金海勇; 赵德生; 王建胜
Original assignee: Kedu Electric Co Ltd
Current assignee: Kedu Electric Co Ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-11-28
Anticipated expiration: 2033-06-02

Abstract

The utility model provides a magnetic quenching isolating switch, which belongs to the technical field of isolating switches and comprises a plurality of switch units which are stacked, wherein each switch unit comprises a unit shell, a moving contact, a fixed contact and a moving contact rotating frame, a first permanent magnet is arranged at the periphery of a moving track of the moving contact which is connected or disconnected with the fixed contact in the switch unit, a second permanent magnet is arranged at the inner periphery of the moving track, and the first permanent magnet and the second permanent magnet are both arranged in an extending manner along the direction perpendicular to the moving track direction of the moving contact; according to the utility model, the permanent magnets are arranged on the inner periphery and the outer periphery of the moving track of the moving contact, and the magnetic field is generated between the permanent magnets, so that the electric arc generated by disconnecting the contact is concentrated in the magnetic field between the magnets, the electric arc can be rapidly pulled out, the electric field intensity between the contacts is reduced, the magnetic flux is increased, the distance between the permanent magnets is reduced, and the arc extinguishing effect is improved.

Description

Isolating switch for magnetic blowout

Technical Field

The utility model relates to the technical field of isolating switches, in particular to a magnetic quenching isolating switch.

Background

The rotary isolating switch in the prior art is generally formed by stacking a plurality of switch units, each switch unit comprises a shell, a moving contact, a fixed contact and a moving contact rotating frame, the moving contact is arranged on the moving contact rotating frame, the moving contact rotating frame is rotationally arranged on the shell, the fixed contact is fixed on the shell and is positioned on the rotating track of the moving contact, and the moving contact and the fixed contact are switched on or off when the moving contact rotating frame rotates, so that the circuit is closed and opened.

The prior art publication No. CN207834143U discloses a switch unit of a rotary isolating switch, which comprises a unit shell, a moving contact and a fixed contact, wherein the unit shell is positioned at the periphery of a moving track from a contact guide of the moving contact with the fixed contact to a separation and disconnection of the moving contact, and a permanent magnet is also arranged at the periphery of the moving track, but the structure is only provided with a magnet at the periphery of the moving track, and the arc extinguishing effect of the N pole to S pole magnetic field generated by one magnet is poor when the contact is disconnected.

Disclosure of Invention

The utility model aims to overcome the defects and the shortcomings of the prior art and provides a magnetic quenching isolating switch.

The technical scheme adopted by the utility model is as follows: the utility model provides an isolator of magnetic blow out arc extinguishing, includes the switch unit that a plurality of piles up the setting, the switch unit is including unit housing, moving contact, stationary contact and moving contact swivel mount, the moving contact is installed in the moving contact swivel mount, the moving contact swivel mount rotates and sets up in the unit housing, the stationary contact is fixed in the unit housing and is located the moving locus of moving contact, make moving contact and stationary contact switch-on or break off when the moving contact swivel mount is rotatory, be located in the switch unit the moving contact with the periphery of moving locus that the stationary contact switch-on or break off is provided with first permanent magnet, and moving locus's inner periphery is provided with the second permanent magnet, first permanent magnet and second permanent magnet all extend along the direction looks vertically with moving contact moving locus direction and set up.

The first permanent magnet and the second permanent magnet are close to the contact or disconnection position of the moving contact and the fixed contact.

The second permanent magnet is arranged on the moving contact rotating frame.

The pair of stationary contacts are located at diagonal positions near the unit housing and are turned on or off with the movable contacts located at the center of the unit housing to rotate.

The circumference lateral wall of moving contact swivel mount is provided with a plurality of division boards along its rotation direction interval, be provided with the opening that supplies the static contact to pass on the division board.

The splitter plate is obliquely arranged along the direction from the contact guide of the movable contact with the fixed contact to the separation and disconnection of the movable contact with the fixed contact.

And an arc striking channel is arranged at the tail end part of the unit shell, which is separated and disconnected from the fixed contact, and the arc striking channel is communicated with the outside.

The static contact comprises a wiring structure, wherein the static contact comprises a wiring terminal, the wiring structure comprises a through hole arranged on the wiring terminal, a screw and a nut fixed on a unit shell, and a wire is connected between the screw and the wiring terminal.

The beneficial effects of the utility model are as follows:

1. according to the utility model, the permanent magnets are arranged on the inner periphery and the outer periphery of the moving track of the moving contact, and the magnetic field is generated between the permanent magnets, so that the electric arc generated by disconnecting the contact is concentrated in the magnetic field between a plurality of magnets, the electric arc can be rapidly pulled open, the electric field intensity between the contacts can be reduced, meanwhile, the electric arc can be rapidly guided to an arc striking channel for guiding out, and the arc extinguishing performance of the isolating switch is improved.

2. According to the utility model, the permanent magnets are arranged in an extending manner along the direction perpendicular to the moving track direction of the moving contact, so that the magnetic flux is increased, the distance between the permanent magnets is reduced, and the arc extinguishing effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a partial exploded view of a disconnector according to the utility model;

FIG. 2 is an exploded view of a partial structure of a isolating switch of the present utility model;

FIG. 3 is a schematic view of a partial structure of a isolation switch of the present utility model;

FIG. 4 is a schematic view of a unit housing according to the present utility model;

fig. 5 is an exploded view of the wiring structure and the stationary contact according to the present utility model.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used for distinguishing two entities with the same name and non-same parameters, and it is noted that the "first" and "second" are merely for convenience of description, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described in any way.

As shown in fig. 1 to 5, an embodiment of the present utility model is provided:

the utility model provides an isolator of magnetic quenching, includes the switch unit that a plurality of piles up the setting, the switch unit is including unit housing 1, moving contact 2, static contact 3 and moving contact swivel mount 4, moving contact 2 installs in moving contact swivel mount 4, moving contact swivel mount 4 rotates and sets up in unit housing 1, static contact 3 is fixed in unit housing 1 and is located moving contact 2's removal orbit, make moving contact 2 and static contact 3 switch on or break off when moving contact swivel mount 4 rotates, be located in the switch unit moving contact 2 with the periphery of moving contact 3 switch on or break off's removal orbit is provided with first permanent magnet 5, and the inner periphery of moving orbit is provided with second permanent magnet 6, in this embodiment, first permanent magnet 5 sets up on unit housing 1, second permanent magnet 6 sets up on moving contact swivel mount 4, is provided with the first mounting groove that is used for installing first permanent magnet 5 on unit housing 1, is provided with the second permanent magnet 6 on moving contact swivel mount 4, makes moving contact 2 and static contact 3 switch on or break off, and the magnetic field of leading-off with the permanent magnet is concentrated to the magnetic field in order to reduce the change in order to lead out the fast-to the magnetic field between the fast-stop, the magnetic field is concentrated to the change in order to the magnetic field between the leading-out the fast-off of moving contact, and the fast-to the change in order to the magnetic field between the switch and the leading-up the fast-off performance.

The first permanent magnet 5 and the second permanent magnet 6 are arranged in an extending mode along the direction perpendicular to the moving track direction of the moving contact 2, the area of the permanent magnets can be enlarged, magnetic flux is increased, the first permanent magnet 5 and the second permanent magnet 6 are close to the position where the moving contact 2 is contacted with or disconnected from the fixed contact 3, the arrangement of the first permanent magnet 5 and the second permanent magnet 6 cannot be limited by the moving contact 2 and the fixed contact 3, the distance between the permanent magnets can be reduced, and accordingly the arc extinguishing effect is improved.

In this embodiment, a pair of the fixed contacts 3 are located at diagonal positions near the unit housing 1, and are connected to or disconnected from the moving contact 2 located at the center of the unit housing 1 and rotating, and the moving contact 2 has two conductive connection ends, so that the first permanent magnet 5 and the second permanent magnet 6 also correspond to the pair of the fixed contacts 3 respectively; a third mounting groove is formed in the moving contact rotating frame 4 for mounting the moving contact 2, the bottom wall of the third mounting groove just reaches the middle of the longitudinal widths of the first permanent magnet 5 and the second permanent magnet 6, and the arc drawing efficiency is improved; the first permanent magnet 5 and the second permanent magnet 6 are tile-shaped, the arc length of the first permanent magnet 5 is smaller than that of the second permanent magnet 6, the first permanent magnet 5 and the second permanent magnet 6 are attached to the moving track, and arc striking efficiency is improved; of course other shapes of permanent magnets, such as cylinders, etc. may be used.

The circumference lateral wall of moving contact swivel mount 4 is provided with a plurality of division boards 41 along its rotation direction interval, be provided with the opening 42 that supplies the static contact 3 to pass on the division board 41, guarantee that contact swivel mount 4 carries moving contact 2 normal rotation, can cut electric arc and increase the arc climbing distance simultaneously to promote the arc extinguishing effect.

The end part of the movable contact 2 and the fixed contact 3 in the unit shell 1, which are separated and disconnected, is provided with an arc striking channel 7, the arc striking channel 7 is communicated with the outside, so that generated electric arcs and hot gas generated after arc extinction are conveniently discharged out of the unit shell 1.

The partition plate 41 is inclined along the direction from the contact and guide of the moving contact 2 to the separation and disconnection of the moving contact 3 from the fixed contact 3, so that the arc can be quickly guided to the arc striking channel 7.

The static contact 3 comprises a wiring terminal 31, the wiring structure comprises a through hole 301 arranged on the wiring terminal 31, a screw 302 and a nut 304 fixed on the unit shell 1, and a wire is connected between the screw 302 and the wiring terminal 31; in the prior art, the screw 302 is generally directly connected with the wiring terminal 31, so when a wire is fixed, the screw directly acts on the fixed contact 3 in the screwing process to enable the fixed contact 3 to move or deform, which can cause poor contact between the movable contact 2 and the fixed contact 3, and reduce the service life of a product. The wiring lug 303 can also be arranged on the screw 302, and the wiring lug 303 can be sleeved on the screw 302 or directly integrally formed with the screw 302, so that the contact area connected with a wire is increased, and the screw is convenient to disassemble and assemble; in this embodiment, the lug 303 and the nut 304 are square, the lug 303 is provided with a through hole through which the screw 302 passes, and meanwhile, a plurality of protrusions 305 are circumferentially arranged on one side of the lug 303 facing the terminal 31 with the through hole as the center, so as to ensure the stability and firmness of the electrical connection of the wires.

The unit housing 1 is provided with a first limiting part 101, a second limiting part 102 and a third limiting part 103, the screw 302 traverses the first limiting part 101, the second limiting part 102 and the third limiting part 103 and is in threaded connection with a nut, the wiring lug 303 is limited on the second limiting part 102, the nut 304 is limited on the third limiting part 103, and in the embodiment, the first limiting part 101, the second limiting part 102 and the third limiting part 103 are grooves matched with the limited parts; the second limiting portion 102 is provided with a connection port 104 communicated with the outside, and the head of the unit housing 1 corresponding to the screw 302 is provided with a mounting and dismounting hole, so that the unit housing 1 does not need to be dismounted for wire connection and disconnection.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims

1. The utility model provides an isolator of magnetic blow out arc, is including a plurality of switch unit that stacks the setting, switch unit is including unit housing (1), moving contact (2), stationary contact (3) and moving contact swivel mount (4), moving contact (2) are installed in moving contact swivel mount (4), moving contact swivel mount (4) rotate set up in unit housing (1), stationary contact (3) are fixed in unit housing (1) and are located the moving track of moving contact (2), make moving contact (2) and stationary contact (3) switch-on or break during moving contact swivel mount (4) rotate, its characterized in that, be located in the switch unit moving contact (2) with the periphery of moving track that stationary contact (3) switch-on or break is provided with first permanent magnet (5), the interior circumference of moving track is provided with second permanent magnet (6), first permanent magnet (5) and second permanent magnet (6) all extend the setting along the direction that is perpendicular to moving track direction with moving contact (2).

2. A magnetic quenching disconnector according to claim 1, characterized in that the first permanent magnet (5) and the second permanent magnet (6) are close to the position where the moving contact (2) is in contact with or disconnected from the stationary contact (3).

3. A magnetic quenching disconnector according to claim 1, characterized in that the first permanent magnet (5) is arranged on the unit housing (1) and the second permanent magnet (6) is arranged on the moving contact swivel (4).

4. A magnetic quenching disconnector according to claim 1, characterized in that a pair of said stationary contacts (3) are located in a diagonal position close to said unit housing (1) and are turned on or off with said movable contact (2) located in the center of said unit housing (1).

5. The isolating switch for magnetic quenching as claimed in claim 1, wherein a plurality of partition plates (41) are arranged on the circumferential side wall of the moving contact rotating frame (4) at intervals along the rotating direction, and openings (42) for the passing of the fixed contacts (3) are arranged on the partition plates (41).

6. A magnetic quenching disconnector according to claim 5, characterized in that the partition plate (41) is arranged obliquely in the direction of the moving contact (2) leading from contact with the stationary contact (3) to disconnection from the stationary contact (3).

7. A magnetic quenching disconnector according to claim 1, characterized in that the end part of the unit housing (1) where the moving contact (2) is separated from the stationary contact (3) is provided with an arc striking channel (7), said arc striking channel (7) being in communication with the outside.

8. A magnetic quenching disconnector according to claim 1, characterized in that it further comprises a wiring structure, the stationary contact (3) comprising a terminal (31), the wiring structure comprising a through hole (301) provided in the terminal (31), a screw (302) and a nut (304) fixed to the unit housing (1), the wire being connected between the screw (302) and the terminal (31).