CN213781917U - Magnetic quenching device for high-current switch - Google Patents
Magnetic quenching device for high-current switch Download PDFInfo
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- CN213781917U CN213781917U CN202120157573.0U CN202120157573U CN213781917U CN 213781917 U CN213781917 U CN 213781917U CN 202120157573 U CN202120157573 U CN 202120157573U CN 213781917 U CN213781917 U CN 213781917U
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- 230000000171 quenching effect Effects 0.000 title claims abstract description 26
- 238000010791 quenching Methods 0.000 title claims abstract description 23
- 230000003068 static effect Effects 0.000 claims abstract description 44
- 238000010891 electric arc Methods 0.000 abstract description 18
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000002146 bilateral effect Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
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Abstract
The utility model discloses a magnetic quenching device for high current switch, including relative first static contact and the second static contact that sets up in the switch casing and the moving contact of setting between first static contact and second static contact, the moving contact is equipped with at least one first magnet with the peripheral one side of the contact surface of first static contact cooperation contact, and the moving contact is equipped with at least one second magnet with the peripheral one side of the contact surface of second static contact cooperation contact. The magnetic blowout device has the advantages that the magnet is arranged on any one side of the contact surface of the contact, the magnetic blowout function can be respectively realized on the electric arc generated between the moving contact and the first static contact as well as the electric arc generated between the moving contact and the second static contact, the moving path of the electric arc is lengthened by utilizing the transverse magnetic field force of the magnet, the electric arc is accelerated to be cooled and extinguished, the magnetic blowout is realized, the arc extinguishing efficiency is higher, the electric service life of the switch is prolonged, and the magnetic blowout device can be widely applied to various switches with high current and high voltage.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field, concretely relates to magnetic quenching device for high current switch.
Background
The switch is a common device in work and life of people, the on-off of a circuit is controlled by controlling the on-off of the switch, the switch in the market has many types, including various switches such as a travel switch, a limit switch, a ship-shaped switch and a button switch, when the on-off of the circuit is realized by the switch, an arc phenomenon is bound to occur between contacts, the arc phenomenon is commonly called arc discharge, particularly for a micro switch with a small size, the generated arc temperature is very high, the generated arc under the condition of high current and high voltage can cause the contacts to be rapidly consumed until the switch is burnt, the switch can be directly caused to be incapable of being normally switched on or off, the allowed current is increased along with the increase of the rated load of the switch, the arc can also be correspondingly increased, and the arc discharge phenomenon is particularly obvious when the direct current is switched on or off.
At present, when the small-sized microswitch is used for breaking to generate electric arc, the arc is quenched mainly by means of contact gaps and air cooling, and referring to a small-sized microswitch shown in fig. 7, the small-sized microswitch comprises a shell 01, an operating mechanism arranged in the shell, a moving contact 04, a normally open terminal pin 02 and a normally closed terminal pin 03, wherein the normally open terminal pin 02 and the normally closed terminal pin 03 are provided with normally closed contacts 06 of normally open contacts 05 which are arranged oppositely from top to bottom, the moving contact is in rotating contact with the normally open contacts or the normally closed contacts under the driving of the operating mechanism, a magnet 07 is arranged in the middle position between the normally open contacts 05 and the normally closed contacts 06, and the magnetic field action generated by the magnet 07 plays a magnetic blow arc extinguishing role on the electric arc generated by the broken moving contacts and the static contacts. It can be seen from above-mentioned structure that micro-gap switch on the market all adopts and sets up a magnet between two normal closings, normally open contact and carry out the magnetic blowout arc extinguishing, its magnetic blowout arc extinguishing effect is not ideal enough in the in-service use, its reason is that the contact surface of normally open contact and normally closed contact is in magnetic field scope border position, but lie in both sides position about the magnet, receive the magnetic blowout effect weaker, move, the arc that produces in the twinkling of an eye of stationary contact closure or disconnection can't be blown out fast, but just can receive the magnetic blowout influence when electric arc moves to magnetic field scope, lead to the durable number of times of electric life not stable enough in the bigger service environment of electric current, shorten the life of switch product.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the switch among the prior art and adopting to set up a magnet and carry out the magnetic blow-out arc between normal close, normally open contact, and its magnetic blow-out arc extinguishing effect is ideal inadequately, leads to the switch electric life durable number of times in the bigger service environment of electric current to be unstable, shortens product life's problem.
For solving the technical problem, the utility model provides a magnetic quenching device for high current switch, be in including switch housing, relative setting first static contact and second static contact in the switch housing with set up moving contact between first static contact and the second static contact, and the drive the moving contact rotates the contact the operating structure of first static contact or second static contact, the moving contact with the peripheral one side of the contact surface of first static contact cooperation contact is equipped with at least one first magnet, the moving contact with the peripheral one side of the contact surface of second static contact cooperation contact is equipped with at least one second magnet.
Preferably, the S-pole or N-pole of the first magnet and the second magnet faces the contact surface.
As a preferable scheme, two first magnets are symmetrically arranged on two sides of a contact surface of the movable contact and the first fixed contact, and the directions of magnetic fields of the two first magnets are consistent.
As a preferable scheme, two second magnets are symmetrically arranged on two sides of a contact surface of the moving contact and the first fixed contact, and the directions of magnetic fields of the two second magnets are consistent.
Preferably, the contact surface is a circular arc surface or a polygonal surface, and the first magnet and the second magnet are arbitrarily arranged in the circumferential direction around the contact surface.
Preferably, the first magnet and/or the second magnet are arranged around a contact surface inside the switch housing or on an outer wall of the switch housing.
As a preferred scheme, the operating structure comprises a button, a movable contact arm, a support frame and a movable spring arranged between the movable contact arm and the support frame, wherein the movable contact is arranged on the movable contact arm, and the movable contact arm is rotatably connected to the bottom end of the button.
Preferably, the first magnet and the second magnet are permanent magnets, respectively.
The utility model discloses technical scheme has following advantage compared in prior art:
1. the utility model provides a magnetic quenching device for high current switch, first static contact and second static contact show the normally open contact and the normally closed contact of switch respectively, mainly produce in the twinkling of an eye that move according to electric arc, quiet two contacts are closed or break off, through setting up first magnet and second magnet respectively at moving contact and the contact surface surrounding one side of first static contact and second static contact, make magnet and contact surface set up relatively, utilize the transverse magnetic field force of magnet to make the electric arc motion route elongated, change the electric arc route by force, accelerate electric arc cooling, extinguish, thereby realize the magnetic quenching, this kind of structural design can play the magnetic quenching effect respectively to the electric arc that produces between moving contact and first static contact and second static contact, the arc extinguishing is accurate quick, arc extinguishing efficiency is higher, can effectively reduce the electric arc that moves, the static contact is closed and the disconnection in-process produces, the magnetic quenching device has the advantages that the magnetic quenching effect is achieved, the moving contact and the static contact are protected, the electrical service life of the switch is prolonged, and the magnetic quenching device can be widely applied to various switches with high current and high voltage.
2. The utility model provides a magnetic quenching device for high current switch sets up two unanimous magnets of magnetic field direction through the contact surface bilateral symmetry at movable contact and first static contact and/or second static contact, inhales characteristics mutually according to the magnetism of two magnets to reinforcing magnetic field force intensity makes electric arc motion path lengthening through this magnetic field force of magnet, with higher speed electric arc cooling, extinguishes, thereby realizes the magnetic quenching, improves the purpose in switch electrical specification and electric life-span.
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 schematic structural diagram of a magnetic quenching device for a high current switch according to the present invention;
FIG. 2 is a schematic diagram of the magnetic quenching apparatus of FIG. 1 with a magnet disposed on the other side of the contact surface;
FIG. 3 is a schematic diagram of the magnetic quenching apparatus shown in FIG. 1, wherein magnets are symmetrically disposed on two sides of a contact surface;
fig. 4 is a schematic structural view of the magnetic quenching device of the present invention, in which a magnet is disposed on the outer wall of the switch housing;
fig. 5 is a schematic view of the working principle of the single magnet of the present invention;
fig. 6 is a schematic view of the working principle of the symmetrical two magnets of the present invention;
FIG. 7 is a schematic structural diagram of a small microswitch in the prior art;
description of reference numerals: 1-a switch shell, 2-a first fixed contact, 3-a second fixed contact, 4-a movable contact, 5-an operation structure, 51-a button, 52-a movable contact arm, 53-a support frame, 54-a movable reed, 6-a first magnet and 7-a second magnet.
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 "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.
Example 1
The present embodiment is described in detail below with reference to the accompanying drawings:
the present embodiment provides a magnetic quenching device for a high current switch as shown in fig. 1-6, which includes a switch housing 1, a first stationary contact 2 and a second stationary contact 3 that are relatively disposed in the switch housing 1, a moving contact 4 that is disposed between the first stationary contact 2 and the second stationary contact 3, and an operating structure 5 that drives the moving contact 4 to rotate and contact the first stationary contact 2 or the second stationary contact 3, at least one first magnet 6 is disposed on one side of the periphery of a contact surface where the moving contact 4 and the first stationary contact 2 are in cooperative contact, and at least one second magnet 7 is disposed on one side of the periphery of a contact surface where the moving contact 4 and the second stationary contact 3 are in cooperative contact.
The above-mentioned embodiment is a core technical solution of this embodiment, where the first static contact 2 and the second static contact 3 respectively represent a normally open contact and a normally closed contact of a switch, and according to the instant that an arc is mainly generated when a moving contact and a static contact are closed or opened, the moving contact 4 and the first static contact 2 and the second static contact 3 are respectively provided with the first magnet 6 and the second magnet 7 on the outer peripheral sides of contact surfaces of the moving contact and the first static contact, so that the magnets and the contact surfaces are arranged opposite to each other, the arc moving path is lengthened by the transverse magnetic field force of the magnets, the arc path is forcibly changed, and cooling and extinguishing of the arc are accelerated, so as to achieve magnetic blowout, and this structural design can respectively perform a magnetic blowout extinguishing function on the arc generated between the moving contact 4 and the first static contact 2 and the second static contact 3, so that the arc extinguishing is accurate and fast, the arc extinguishing efficiency is higher, and the dynamic arc extinguishing and the static contacts can be effectively reduced, The arc generated in the process of closing and opening the static contact achieves the magnetic quenching effect, plays a role in protecting the moving contact and the static contact, and improves the effect of the electrical service life of the switch.
As a preferred embodiment, as shown in fig. 1-2, one of the first magnet 6 and the second magnet 7 is disposed on one side of a contact surface of the movable contact 4 and one side of a contact surface of the first stationary contact 2 and one side of a contact surface of the second stationary contact 3, the first magnet 6 and the second magnet 7 are permanent magnets respectively, and are disposed in a switch housing in an up-down opposite manner, and such permanent magnets may be S-pole facing contact surfaces or N-pole facing contact surfaces, both of which can achieve the effect of magnetic quenching.
In order to further improve the magnetic quenching capability of the switch, as shown in fig. 3-4, two first magnets 6 are symmetrically arranged on two sides of the contact surface between the movable contact 4 and the first fixed contact 2, and the magnetic field directions of the two first magnets 6 are the same; and two second magnets 7 are symmetrically arranged on two sides of the contact surface of the movable contact 4 and the first fixed contact 2, and the directions of the magnetic fields of the two second magnets 7 are the same. The benefit of design like this lies in, sets up two unanimous magnets of magnetic field direction through the bilateral symmetry at the contact surface of contact, according to the magnetism looks attraction characteristics of two magnets to reinforcing magnetic field strength, making electric arc motion path lengthen through this magnetic field strength of magnet, accelerating arc cooling, extinguishing, thereby realize the magnetic blowout arc, improve the purpose in switch electrical specification and electric life-span.
Although one or a pair of magnets are symmetrically arranged in the above embodiment, the specific arrangement manner of the first magnet and the second magnet is not exclusive, in this embodiment, the contact surface is an arc surface or a polygonal surface, and one or more magnets are arbitrarily arranged in the circumferential direction around the contact surface of the first magnet 6 and the second magnet 7, so that the placement position of the magnets can be within 360 degrees of the circumference of the contact surface of the movable contact and the stationary contact under the condition that the normal operation of the switch is not affected. As a specific structural arrangement, the first magnet 6 and/or the second magnet 7 are disposed inside the switch housing 1 around the contact surface, and as shown in fig. 1 to 3, the first magnet or the second magnet may be disposed on the right side of the contact surface, may also be disposed on the right side of the contact surface, and may also be symmetrically disposed on the left and right sides of the contact surface; alternatively, referring to fig. 4, the first magnet 6 and/or the second magnet 7 may be disposed on the outer wall of the switch housing 1 around the contact surface, and such magnets may be mounted in mounting grooves inside the housing or fixed on the inner wall or outer wall of the switch housing by gluing, in the above embodiment, only the first magnet or the second magnet is directly opposite to the contact surface, and the arc path is forcibly changed by the lateral magnetic force of the magnets, so as to achieve the best arc extinguishing effect.
The magnetic quenching device provided by this embodiment can be applied to a micro switch, a travel switch, a limit switch, a ship-shaped switch, a button switch, and the like, wherein a high current switch in this embodiment is preferably a micro switch, as shown in fig. 1, the operation structure 5 includes a button 51, a movable contact arm 52, a support frame 53, and a movable spring 54 disposed between the movable contact arm and the support frame, the movable contact 4 is disposed on the movable contact arm 52, the movable contact arm 52 is rotatably connected to the support frame by applying a force, the button is located above the movable contact arm and drives the movable contact arm to rotate, the support frame includes a common terminal extending out of a switch housing, the movable contact maintains a contact state with a first stationary contact (normally closed contact) when the movable contact button is not pressed down, and is separated from the first stationary contact (normally closed contact) when the button is pressed down to drive the movable contact arm, and is kept in a contact state with the second fixed contact (normally open contact).
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 (8)
1. The utility model provides a magnetic quenching device for high current switch, includes switch housing (1), relatively sets up first static contact (2) and second static contact (3) in switch housing (1), and set up moving contact (4) between first static contact (2) and second static contact (3), and drive moving contact (4) rotate the operating structure (5) of contact first static contact (2) or second static contact (3), its characterized in that: at least one first magnet (6) is arranged on one side of the periphery of a contact surface of the movable contact (4) in matched contact with the first fixed contact (2), and at least one second magnet (7) is arranged on one side of the periphery of a contact surface of the movable contact (4) in matched contact with the second fixed contact (3).
2. The magnetic quenching device for high current switch of claim 1, wherein: the S pole or the N pole of the first magnet (6) and the second magnet (7) faces the contact surface.
3. The magnetic blowout device for a high current switch of claim 2, wherein: two first magnets (6) are symmetrically arranged on two sides of a contact surface of the moving contact (4) and the first fixed contact (2), and the directions of magnetic fields of the two first magnets (6) are consistent.
4. The magnetic blowout control apparatus for a high current switch of claim 3, wherein: two second magnets (7) are symmetrically arranged on two sides of a contact surface of the moving contact (4) and the first fixed contact (2), and the directions of magnetic fields of the two second magnets (7) are consistent.
5. Magnetic quenching device for high current switches according to any of claims 1-4, characterized in that: the contact surface is a circular arc surface or a polygonal surface, and the first magnet (6) and the second magnet (7) are randomly arranged around the contact surface along the circumferential direction.
6. The magnetic blowout device for a high current switch of claim 5, wherein: the first magnet (6) and/or the second magnet (7) are arranged around a contact surface inside the switch housing (1) or on an outer wall of the switch housing (1).
7. The magnetic blowout control apparatus for a high current switch of claim 6, wherein: the operating structure (5) comprises a button (51), a movable contact arm (52), a support frame (53) and a movable spring (54) arranged between the movable contact arm and the support frame, the movable contact (4) is arranged on the movable contact arm (52), and the movable contact arm (52) is connected to the support frame in a stress rotatable manner.
8. The magnetic quenching device for high current switch of claim 1, wherein: the first magnet (6) and the second magnet (7) are permanent magnets respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120157573.0U CN213781917U (en) | 2021-01-20 | 2021-01-20 | Magnetic quenching device for high-current switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120157573.0U CN213781917U (en) | 2021-01-20 | 2021-01-20 | Magnetic quenching device for high-current switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213781917U true CN213781917U (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120157573.0U Active CN213781917U (en) | 2021-01-20 | 2021-01-20 | Magnetic quenching device for high-current switch |
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| Country | Link |
|---|---|
| CN (1) | CN213781917U (en) |
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2021
- 2021-01-20 CN CN202120157573.0U patent/CN213781917U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230711 Address after: 325606 Wang Zhai Cun, Wengyang Street, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: Yueqing Zhibang Electric Co.,Ltd. Address before: Building e, leshang Pioneer Park, Weng long street, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: Chen Can |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 325606 Houqiao Village, Wenzhou Yueqing City, Zhejiang Province Patentee after: Wenzhou Zhibang Electric Co.,Ltd. Country or region after: China Address before: 325606 Wang Zhai Cun, Wengyang Street, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: Yueqing Zhibang Electric Co.,Ltd. Country or region before: China |