CN116913711A - Switch unit and rotary isolating switch - Google Patents

Abstract

The application provides a switch unit and a rotary isolating switch, which relate to the technical field of low-voltage electrical appliances, wherein a moving contact is rotationally arranged on a unit shell, at least two magnets are positioned on a rotating plane of the moving contact and distributed on the outer side of an arc-shaped rotating path, and at least two magnets are sequentially and alternately distributed along the arc-shaped rotating path.

Description

Switch unit and rotary isolating switch

The application claims priority to a switch unit and a rotary isolating switch, with application number 202210398842.1 and application number 2022, 04 and 15.

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a switch unit and a rotary isolating switch.

Background

With the rapid development of economy, the living standard of people is obviously improved, and the safety of electricity utilization is more comprehensively perceived. In order to increase the safety of electricity, an isolating switch is usually connected in a circuit, so that when the electrical equipment is maintained, the power supply is cut off through the isolating switch, the electrical equipment is isolated from a live part, and an effective isolation distance is kept.

With the lifting of the voltage, the electric arc generated in the switching-on and switching-off process is more and more difficult to extinguish, the arc extinguishing time is shortened by the acting force applied to the electric arc by the magnet, but the arc extinguishing effect is poor due to unreasonable distribution of the magnet, so that the performance of the isolating switch is poor.

Disclosure of Invention

The application aims to overcome the defects in the prior art and provide a switch unit and a rotary isolating switch so as to solve the problem that the distribution of magnets in the conventional isolating switch is unreasonable.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows:

in one aspect of an embodiment of the present application, there is provided a switching unit including: the movable contact is rotationally arranged in the unit shell to form an arc-shaped rotating path matched with the static contact to be opened and closed, and the at least two magnets are distributed on the outer side of the arc-shaped rotating path and are sequentially distributed at intervals along the arc-shaped rotating path.

Optionally, the at least two magnets comprise at least one first magnet and at least one second magnet, the first and second magnets being of opposite polarity.

Alternatively, the first magnets and the second magnets are alternately arranged.

Optionally, the switch unit further includes a lower plate and an upper plate stacked along a rotation axis direction of the moving contact to form a clamp cavity, the moving contact is disposed in the clamp cavity, and the fixed contact has an extension portion extending to the clamp cavity to be located on the arc-shaped rotation path.

Alternatively, the polarities of adjacent two magnets are the same.

Optionally, the switch unit further includes a base plate stacked with the moving contact in a direction of a rotation axis of the moving contact so that a force of the magnet acting on an arc between the moving contact and the fixed contact is directed toward the base plate.

Alternatively, one pole of each magnet is located on one side of the magnet facing the arcuate rotational path and the other pole is located on the other side of the magnet facing away from the arcuate rotational path.

Optionally, the two poles of each magnet are respectively located at two opposite sides of the magnet, and the connecting line direction of the two poles of the magnet is approximately perpendicular to the rotating plane of the moving contact.

Optionally, an arc extinguishing chamber is further arranged at the outer side of the arc-shaped rotating path, and an inlet of the arc extinguishing chamber corresponds to the arc-shaped rotating path and is used for enabling the magnet to guide an arc between the moving contact and the fixed contact to enter the arc extinguishing chamber through the inlet of the arc extinguishing chamber.

Optionally, the switch unit further includes a first arc striking member and a second arc striking member, the first arc striking member is connected with the fixed contact and extends towards the arc extinguishing chamber, and the second arc striking member is located at the opening position of the moving contact and extends towards the arc extinguishing chamber.

Optionally, at least two magnets are embedded in the outer wall of the arc extinguishing chamber.

Optionally, at least two magnets are located in a rotation plane of the moving contact.

Optionally, the switch unit further includes a filter screen and an air outlet channel disposed on the unit housing and connected to the outside of the unit housing, and one end of the air outlet channel extends to the arc-shaped rotation path.

Optionally, the filter screen is a metal filter screen.

Optionally, a side of the magnet close to the arc-shaped rotation path is an arc surface or a plane. In another aspect of the embodiments of the present application, a rotary isolating switch is provided, including an actuating mechanism and a switch body, where the switch body includes a plurality of any one of the switch units, and the plurality of switch units are sequentially stacked, and the actuating mechanism is in driving connection with each moving contact to drive the moving contacts of the plurality of switch units to rotate synchronously.

The beneficial effects of the application include:

the application provides a switch unit and a rotary isolating switch, wherein the switch unit comprises a unit shell, a moving contact, a fixed contact and at least two magnets, wherein the moving contact, the fixed contact and the at least two magnets are arranged in the unit shell, the moving contact is rotationally arranged in the unit shell, so that an arc-shaped rotating path is formed in the process of matching the fixed contact in a rotating manner to conduct switching-on and switching-off movement, the at least two magnets are positioned on a rotating plane of the moving contact and distributed on the outer side of the arc-shaped rotating path, the thickness of the switch unit is conveniently thinned, interference between the magnets and the moving contact can be avoided, the at least two magnets are sequentially arranged at intervals along the arc-shaped rotating path, on one hand, a magnetic field generated by the magnets can cover the area of an arc generated by the moving contact more comprehensively, the action area of the magnetic field on the arc is increased, on the other hand, different magnetic fields can be independently generated in a mode of mutually spacing the magnets, on the other hand, the speed of extinguishing the arc is accelerated in a mode of jointly acting on the arc by virtue of the magnetic fields, on the other hand, the arc-shaped rotating path of the magnets which are arranged along the arc-shaped rotating path, so that the effect of the moving contact can be more attached.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a rotary isolating switch according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a switch unit according to an embodiment of the present application;

FIG. 3 is a second schematic diagram of a switch unit according to an embodiment of the present application;

FIG. 4 is a third schematic diagram of a switch unit according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a switch unit according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a switch unit according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a magnet distribution according to an embodiment of the present application;

FIG. 8 is a schematic illustration of a magnet-operated arc according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a switch unit according to an embodiment of the present application;

FIG. 10 is a second schematic diagram of a magnet distribution according to an embodiment of the present application;

FIG. 11 is a schematic diagram of a second embodiment of a magnetic arc;

fig. 12 is a schematic structural view of a magnet according to an embodiment of the present application;

FIG. 13 is a third schematic view of a magnet distribution according to an embodiment of the present application;

fig. 14 is a schematic structural view of a filter screen according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of another switch unit according to an embodiment of the present application;

FIG. 16 is a second schematic diagram of a switch unit according to another embodiment of the present application;

fig. 17 is an assembly schematic diagram of an arc extinguishing chamber and a magnet according to an embodiment of the present application;

fig. 18 is an exploded view of yet another switch unit according to an embodiment of the present application;

FIG. 19 is a third schematic diagram of a switch unit according to another embodiment of the present application;

FIG. 20 is one of the schematic diagrams of yet another magnet distribution provided by an embodiment of the present application;

FIG. 21 is a schematic diagram of an arc with a magnet in a polar switching unit according to an embodiment of the present application;

FIG. 22 is a schematic diagram of yet another alternative magnetic-arc in a non-polar switching unit according to an embodiment of the present application;

FIG. 23 is a second schematic view of another magnet distribution according to an embodiment of the present application;

FIG. 24 is a schematic diagram showing a second alternative magnetic arc in a polar switching unit according to an embodiment of the present application;

fig. 25 is a schematic diagram showing a second alternative magnet-operated arc in a nonpolar switching unit according to an embodiment of the present application.

Icon: 010-rotating the disconnector; 020-a switch body; 030—an action mechanism; 100-a switching unit; 110-unit housing; 111-separator; 112-an outlet channel; 113-an air outlet; 114-arc extinguishing gas; 120-stationary contact; 130-moving contact; 140-magnets; 141-a first magnet; 142-a second magnet; 150-filtering net; 160-contact holders; 161-lower plate; 162-upper plate; 170-arc extinguishing chamber; 171-outlet; 172-inlet; 173-an embedded groove; 174-connecting piece; 181-a first arc striking piece; 182-second arc striking member.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. It should be noted that, under the condition of no conflict, the features of the embodiments of the present application may be combined with each other, and the combined embodiments still fall within the protection scope of the present application.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "inner", "outer", etc. are directions or positional relationships based on those shown in the drawings, or those conventionally put in use of the product of the application, are merely for convenience of description and simplicity of description, and thus should not be construed as limiting the present application.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "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; 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 application will be understood in specific cases by those of ordinary skill in the art.

The application provides a rotary isolating switch and a switch body applied to the same, wherein the switch body is provided with a switch unit, and magnets in the switch unit are reasonably distributed, so that a magnetic field generated by the magnets can effectively act on an electric arc generated in a switching-off process, the extinguishing speed of the electric arc is increased, the extinguishing performance of the rotary isolating switch is effectively improved, and the limitation of the extinguishing performance in multi-scene application is reduced. Embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to fig. 1, the rotary isolating switch 010 includes an actuating mechanism 030 and a switch body 020, and the actuating mechanism 030 is in driving connection with the switch body 020, so that the actuating mechanism 030 controls the switching-on and switching-off actions of the switch body 020, and the action accuracy and the switching-on and switching-off reliability of the switch body 020 are improved. In actual setting, the switch body 020 may be fixedly disposed on one side of the housing where the action mechanism 030 is disposed, and the fixing manner may be detachable connection or non-detachable connection, for example, the detachable connection may be multiple manners such as screwing, clamping, and splicing.

With continued reference to fig. 1, the switch body 020 includes a plurality of stacked switch units 100, where each switch unit 100 has an independent contact system built therein, so that each switch unit 100 can be connected to a circuit and perform on-off control on the connected circuit. When the on-off state (corresponding to the on-off state of the connected circuit) of the switch units 100 is controlled, a driving relationship between the action mechanism 030 and the contact system in each switch unit 100 can be established, so that the same action mechanism 030 uniformly controls the on-off of the plurality of switch units 100, and the high consistency of the on-off state in each switch unit 100 is ensured, in other words, all switch units 100 are simultaneously in the on-off state or are simultaneously in the on-off state under the control of the action mechanism 030. In actual setting, the moving contacts 130 in the contact systems built in all the stacked switch units 100 may be disposed on the same transmission rod, and the actuating mechanism 030 is in driving connection with the transmission rod, so as to achieve high consistency of on-off states in each switch unit 100.

For a switch unit 100, the built-in contact system may include only one set of moving and static contacts (each set includes only one fixed contact and one moving contact), or may include two sets, three sets or multiple sets of moving and static contacts that cooperate with each other, and according to the number of sets, the corresponding circuit may form a single break point, a double break point, a triple break point or multiple break points when the circuit is disconnected. It should be noted that, when the moving contacts are divided into the groups, the two moving contacts 130 in the two groups of moving contacts are integrated to form a structural member, and as shown in fig. 9, two ends of the middle structural member may be respectively used as two moving contacts 130, one of which is matched with the fixed contact 120 on one side, and the other of which is matched with the fixed contact 120 on the other side, so that a double-breakpoint structure may be formed.

With continued reference to fig. 1, in order to improve the operability of the rotary isolation switch 010, a handle for driving connection of the actuating mechanism 030 may be disposed outside the actuating mechanism 030 of the rotary isolation switch 010, so as to facilitate practical use by a user. It should be understood that, when the handle is set, the handle may be located on a side (shown in fig. 1) of the housing where the action mechanism 030 is located, where the side faces away from the switch body 020, and of course, may also be located on a side where the housing where the action mechanism 030 is located is adjacent to the switch body 020, and when the handle is actually set, the handle may be adaptively and selectively adjusted according to an actual installation and use environment, so as to meet installation and use in different environments.

The embodiment of the present application provides a switch unit 100, including: the unit shell 110, the contact system and at least two magnets 140, wherein the contact system and the at least two magnets 140 are distributed in the unit shell 110, the at least two magnets 140 are only matched with one group of moving contacts in the contact system, the at least two magnets 140 can generate magnetic fields, and the magnetic fields generated by the at least two magnets 140 cover the areas of electric arcs generated when the corresponding matched group of moving contacts are closed and opened, so that the magnetic fields generated by the magnets 140 can guide the stretching electric arcs to be extinguished in an accelerating way.

Specifically, the set of moving contacts includes a fixed contact 120 and a moving contact 130 that are matched with each other, where the moving contact 130 is rotatably disposed on the unit housing 110, the fixed contact 120 is fixedly disposed on the unit housing 110, and the fixed contact 120 has a portion located on a rotating path of the moving contact 130, so that in an actual closing movement of the moving contact 130, the moving contact 130 can contact with the fixed contact 120 to close or separate from the moving contact in a rotating manner, and form an arc-shaped rotating path. It should be noted that, the arc-shaped rotation path of the moving contact 130 should correspond to an arc-shaped rotation path when the moving contact 130 is switched on and an arc-shaped rotation path when the moving contact 130 is switched off, and in some embodiments, the arc-shaped rotation path corresponding to the moving contact 130 when the moving contact 130 is switched on and the arc-shaped rotation path corresponding to the moving contact 130 when the moving contact is switched off are continuous and not coincident, and this mode corresponds to unidirectional rotation of the moving contact 130; in some embodiments, the arc-shaped rotating path corresponding to the closing of the moving contact 130 and the arc-shaped rotating path corresponding to the opening completely coincide, and the moving contact 130 is correspondingly rotated in a bidirectional reciprocating manner; the application is not limited in this regard.

The at least two magnets 140 are located on the rotating plane of the moving contact 130 in the corresponding matched set of moving contacts and distributed on the outer side of the arc rotating path of the moving contact 130 (for example, the at least two magnets 140 are located on one side of the same arc rotating path away from the central angle opposite to the arc rotating path), so that the thickness of the switch unit 100 is conveniently thinned, interference between the magnets 140 and the moving contact can be avoided, the at least two magnets 140 are sequentially arranged at intervals along the same arc rotating path, on one hand, the magnetic field generated by the magnets 140 can be more comprehensively covered on the area of an arc generated by the moving contact, the action area of the magnetic field on the arc is increased, on the other hand, different magnetic fields can be independently generated in a mode that the magnetic fields act on the arc together, the extinguishing speed of the magnetic fields is accelerated, on the other hand, the mode that the magnets 140 are arranged along the same arc rotating path can be more attached to the arc rotating path of the moving contact 130, and the action effect of the magnetic field on the arc is improved. It should be noted that, in the present application, for a set of moving contacts (a moving contact and a fixed contact), at least two magnets 140 are disposed corresponding to the set of moving contacts in the foregoing manner, for example, when the contact system includes two sets of moving contacts, two sets of magnets (each set of magnets includes at least two magnets 140) are disposed corresponding to each other in a one-to-one correspondence manner.

It should be understood that the rotation plane of the moving contact in the present application is not only a specific plane, but also includes several planes which are perpendicular (may be approximately perpendicular) to the rotation axis of the moving contact and are sequentially stacked in the direction of the rotation axis of the moving contact, considering that the moving contact itself has a certain thickness and a certain size. Similarly, the magnet is located in the rotation plane of the moving contact, which may be just intersecting with the rotation plane of the moving contact (any one of several planes) (e.g., the magnet is approximately at the same height as the moving contact as shown in fig. 2 to 6), or slightly deviating from the rotation plane of the moving contact (e.g., the magnet is slightly lower than the moving contact as shown in fig. 15 to 25).

Referring to fig. 2 and 3, a switch unit 100 with a double breakpoint structure according to an embodiment of the present application is shown, wherein two moving contacts 130 in two sets of moving contacts are integrated in a structural member, the structural member is rotatably disposed at a middle position of the switch unit 100, the two moving contacts 130 are distributed at opposite ends of the structural member, the structural member can perform bidirectional reciprocating rotation about a rotation axis a, and in order to improve rotation stability of the structural member, the structural member can be further disposed on a contact support 160, and in fig. 2, two protruding positions distributed at two sides of the rotation axis a and located on the contact support 160 correspond to the moving contacts 130 in two sets of contact systems respectively.

Referring to fig. 2 and 3, the fixed contacts 120 in the two groups of moving contacts may be distributed on the periphery of the moving contact 130 with respect to the rotation axis a, and the connection line between the two fixed contacts 120 passes through the rotation axis a, so that a sufficient space is provided between the moving contact 130 and the fixed contact 120 in the group in the opening state to ensure the reliability of opening.

Referring to fig. 2 and 3, the state shown in fig. 2 and 3 is a switching-off state of the switch unit 100, where the moving contact 130 is located at a switching-off position, and when switching-on is required, the structural member in the middle rotates around the rotation axis a, and only for one of the two groups of moving contacts (the other group is the same): one moving contact 130 positioned on the structural member rotates towards the direction of approaching the fixed contact 120 in the group (clockwise rotation in fig. 3) until the moving contact 130 rotates to the fixed contact 120 in the group and contacts with the fixed contact 120, thereby completing closing; when opening is required, the structural member in the middle is rotated reversely (in the opposite direction to the rotation direction of closing, i.e. rotated anticlockwise in fig. 3) around the rotation axis a, so that the moving contacts 130 in the group return to the opening position, and therefore, the rotation path of the moving contacts 130 in the group when closing is coincident with the rotation path of opening, and an arc-shaped rotation path b in fig. 2 or 3 is formed. The movement modes of the on-off gate of the other group of moving and static contacts are similar to reference, and are not repeated here. Thus, the two moving contacts 130 respectively form two arc-shaped rotating paths b in fig. 2 or 3.

With continued reference to fig. 2 and fig. 3, two sets of magnets 140 are correspondingly disposed in the unit housing 110, and one set of magnets 140 is distributed corresponding to one set of moving contacts, in other words, each set of magnets 140 is used for guiding the arc generated in the switching-on/off process of the moving contacts of the corresponding set to be accelerated to extinguish, and only the set of magnets 140 and the moving contacts distributed on the left side in fig. 3 are described as follows: the moving contact 130 in the moving contact group on the left side is provided with an arc rotating path b on the left side, a group of magnets 140 are arranged on the outer side of the arc rotating path b, so that interference generated by the closing and opening movements of the group of magnets 140 and the moving contact 130 can be avoided, the group of magnets 140 are provided with two magnets 140, the two magnets 140 are positioned on the rotating plane of the moving contact 130, the thickness of the switch unit 100 is conveniently thinned, the two magnets 140 are sequentially and alternately distributed along the arc rotating path b, therefore, on one hand, the magnetic field generated by the magnets 140 can cover the area of an arc generated by the moving contact more comprehensively, the action area of the magnetic field on the arc is increased, on the other hand, different magnetic fields can be independently generated in a mode that the magnetic fields act on the arc together, the extinguishing speed of the moving contact can be accelerated, on the other hand, the mode that the magnets 140 are distributed along the arc rotating path can be more attached to the arc rotating path of the moving contact 130, and the action effect of the magnetic field on the arc is improved. Similarly, the set of magnets 140 and the set of moving and static contacts distributed on the right side in fig. 3 may be disposed with reference to the left side, and the same effects as those described above are also achieved, and will not be repeated here.

Referring to fig. 4, an embodiment is shown in which three magnets 140 are sequentially arranged at intervals along the same arc-shaped rotation path b, and similarly, the magnets are still located on the rotation plane of the same moving contact 130 and are distributed outside the arc-shaped rotation path b, and as the number of the magnets 140 increases, more magnetic fields can be formed to more finely guide the arc generated on the arc-shaped rotation path b so as to accelerate the extinguishing speed thereof.

In the switch unit 100 having multiple sets of moving and static contacts and multiple sets of magnets 140, the number of magnets 140 in each set of magnets 140 may be the same or partially different, for example, in some embodiments, referring to fig. 4, there are 2 sets of magnets 140 and 2 sets of moving and static contacts, where the left set of magnets 140 may include 3 magnets 140 and the right set of magnets 140 may include 2 magnets 140, which is not limited by the present application.

In some embodiments, the at least two magnets 140 include at least one first magnet 141 and at least one second magnet 142, the polarities of the first magnet 141 and the second magnet 142 are opposite, and the numbers of the first magnet 141 and the second magnet 142 may be equal or different, in other words, the at least two magnets 140 include two magnets 140 with opposite polarities, and the numbers of the magnets 140 of the two portions may be the same or different, which is not limited by the present application. Therefore, among the plurality of magnetic fields generated by the at least two magnets 140 which are arranged at intervals along the same arc-shaped rotating path, two types of magnetic fields exist, one type of magnetic field generates a first-direction acting force on the arc, the other type of magnetic field generates a second-direction acting force on the arc, and the first direction is opposite to the second direction, so that when the two types of magnetic fields act on the arc, the length of the arc can be stretched, and the extinguishing speed of the arc is accelerated.

Referring to fig. 7, two magnets 140, a first magnet 141 and a second magnet 142, respectively, are shown distributed outside the same arc-shaped rotation path b, for the first magnet 141: the N pole is positioned on one side surface of the first magnet 141, which is close to the arc-shaped rotating path b, and the S pole is positioned on one side surface of the first magnet 141, which is far from the arc-shaped rotating path b; for the second magnet 142: the S pole is located on a side of the second magnet 142 close to the arc-shaped rotation path b, and the N pole is located on a side of the second magnet 142 far from the arc-shaped rotation path b. Thus, referring to fig. 8, in the embodiment of the first magnet 141 and the second magnet 142 in fig. 7, the magnetic fields generated by the two magnets 140 respectively act on the arc d, wherein the magnetic field generated by one magnet 140 generates an upward acting force F1 on the arc d, and the magnetic field generated by the other magnet 140 generates a downward acting force F2 on the arc d, so that the arc d is stretched to have a longer length, and the extinguishing speed is accelerated.

In some embodiments, when there are a plurality of magnets 140 distributed outside the same arc-shaped rotation path, wherein the first magnets 141 and the second magnets 142 with opposite polarities may be denoted as a and B, respectively, the plurality of magnets 140 may have various arrangements, for example, an ABAB arrangement, or an ABBAAA arrangement, when they are arranged at intervals along the same arc-shaped rotation path.

Referring to fig. 6, the switch unit 100 further includes a contact support 160, where the contact support 160 includes a lower plate 161 and an upper plate 162, and the lower plate 161 and the upper plate 162 are stacked along a rotation axis direction a of the moving contact 130, and have a space therebetween, so that a cavity is formed between the upper plate 162 and the lower plate 161, the moving contact 130 is disposed in the cavity, the fixed contact 120 has an extension portion extending into the cavity and located on the arc-shaped rotation path b, and actually contacts or separates from the extension portion on the fixed contact 120 during the closing and opening process of the moving contact 130.

Referring to fig. 6 to 8, when the magnetic fields generated by the two magnets 140 having opposite polarities act on the arc d, the magnetic field generated by one of the magnets 140 generates an upward force F1 on the arc d, so that the arc d is guided to approach the upper plate 162, and the magnetic field generated by the other magnet 140 generates a downward force F2 on the arc d, so that the arc d approaches the lower plate 161, and thus, the arc d contacts the upper plate 162 and the lower plate 161 on the basis of stretching and lengthening the arc d, thereby cooling the arc d and further accelerating the extinguishing speed of the arc d.

In some embodiments, all the magnets 140 in the at least two magnets 140 have the same polarity, so that the plurality of magnets 140 generate a plurality of magnetic fields when being arranged at intervals along the same arc-shaped rotation path, the plurality of magnetic fields generate forces in the same direction on the arc, and the at least two magnets 140 are arranged to form an arc shape, so that when different magnetic fields act on the arc (especially two adjacent magnetic fields), the magnetic fields can be overlapped, the forces acting on the arc are increased, the arc blowing capability on the arc is enhanced, and the extinguishing speed of the arc is accelerated.

Referring to fig. 10, two magnets 140 are shown distributed outside the same arcuate rotation path b, for one of the magnets 140: the N pole is positioned on one side surface of the magnet 140, which is close to the arc-shaped rotating path b, and the S pole is positioned on one side surface of the magnet 140, which is far away from the arc-shaped rotating path b; for the other magnet 140: the N pole is located on a side of the magnet 140 close to the arc-shaped rotation path b, and the S pole is located on a side of the magnet 140 far from the arc-shaped rotation path b. Thus, referring to fig. 11, in the embodiment of the distributed magnets 140 shown in fig. 10, the magnetic fields generated by the two magnets 140 each act on the arc d, wherein the magnetic field generated by one magnet 140 generates an upward acting force F1 on the arc d, and the magnetic field generated by the other magnet 140 generates an upward acting force F2 on the arc d, and the resultant force of the two magnetic fields acting on the arc d is F in view of the same polarity of the two magnetic fields, wherein f=f1+f2, so that the acting force F acting on the arc d is increased, and the arc blowing capability on the arc d is enhanced, thereby accelerating the extinguishing speed thereof. Of course, in other embodiments, the forces generated by the two magnetic fields on the arc d may also be downward.

Referring to fig. 6, 10 and 11, when the magnetic fields generated by the two magnets 140 having the same polarity act on the arc d, the arc d may be guided to approach the upper plate 162 (substrate) by the resultant force F, so that the arc d is brought into contact with the upper plate 162 (substrate) on the basis of increasing the arc blowing capability, thereby cooling the same and further accelerating the extinguishing speed of the arc d. Of course, in other embodiments, the forces generated by the two magnetic fields on the arc d may also direct the arc d near the lower plate 161 (substrate).

At the same polarity of the magnets 140 distributed outside the same arc-shaped rotation path b, only the contact holder 160 may be provided with the lower plate 161 (substrate) or the upper plate 162 (substrate) so as to be in contact with the guided arc under the action of the magnetic field.

In some embodiments, the moving contact 130 may be fixedly disposed on the contact support 160, for example, as shown in fig. 2 to 6, where corresponding slots are disposed on each of the upper plate 162 and the lower plate 161 to limit the moving contact 130, and during the rotation of the moving contact 130, the moving contact 130 and the contact support 160 rotate as a whole around the rotation axis a.

In some embodiments, the moving contact 130 may be rotatably disposed with the contact holder 160 such that only the moving contact 130 rotates during rotation of the moving contact 130, and the contact holder 160 does not follow the rotation thereof.

In some embodiments, the contact holder 160 should be of an insulating material.

In some embodiments, the side of the magnet 140 adjacent to the arcuate rotation path b is an arcuate surface or plane.

Referring to fig. 5, an embodiment in which the magnets 140 are rectangular block magnets 140 is shown, and two adjacent rectangular block magnets 140 may be disposed in a V-shape and disposed at an included angle c. Of course, in other embodiments of the present application, the magnet 140 may also be in the form of a cylinder, a ball, or the like.

Referring to fig. 12, an embodiment in which the magnet 140 is an arc-shaped block magnet 140 is shown, and referring to fig. 13, the arc-shaped block magnet 140 can be more attached to the arc-shaped rotation path when being distributed on the outer side of the same arc-shaped rotation path, so that the formed magnetic field can be more uniformly distributed on the arc-shaped rotation path.

For the same arc-shaped rotation path, two adjacent magnets 140 correspondingly distributed on the outer sides of the arc-shaped rotation path may have the same specification and size, or may have different specification and size, for example, in fig. 5, the length of the magnet 140 disposed close to the fixed contact 120 is greater than the length of the magnet 140 disposed far from the fixed contact 120, and of course, the length of the magnet 140 disposed close to the fixed contact 120 may be equal to or less than the length of the magnet 140 disposed far from the fixed contact 120.

The magnet 140 provided in the present application may be in various forms such as a permanent magnet 140, a non-permanent magnet 140, etc., as long as it can generate a magnetic field covering an arc when the arc is generated and guide the arc to accelerate the extinction thereof.

In some embodiments, as shown in fig. 2 and 3, a partition 111 may be further disposed between the magnet 140 disposed outside the same arc-shaped rotation path b and the arc-shaped rotation path b, and the partition 111 may be made of an insulating material, so as to prevent an arc from acting on the magnet 140 and reduce the performance of the magnet 140.

Referring to fig. 2 and 3, an air outlet channel 112 is further disposed on the unit housing 110 of the switch unit 100 to communicate the inside of the unit housing 110 with the outside, so that during normal switching-on/off process of the switch unit 100, the pressure difference between the inside and the outside can be reduced by exhausting air from the air outlet channel 112 due to the high-pressure state of the inside, thereby ensuring the stability of the switch unit 100 in long-term use.

With continued reference to fig. 2 and 3, the air outlet channels 112 may also be distributed outside the arc-shaped rotating path, and one end of the air outlet channel 112 extends and is connected to the arc-shaped rotating path, while the other end is connected to the outside. For the same group of moving and static contacts, the air outlet channel 112 is closer to the opening position, so that the electric arc can be fully extinguished while high-pressure gas is discharged outwards, and a large number of non-extinguished electric arcs are avoided while gas is sprayed out. The same set of moving and static contacts may be matched with one or more air outlet channels 112, which is not limited by the present application, and an embodiment of a set of moving and static contacts corresponding to one air outlet channel 112 is shown in fig. 2 and 3.

Referring to fig. 2, 3 and 14, a filter screen 150 is further disposed on the air outlet channel 112, so that the arc which may not be completely extinguished can be segmented again by the filter screen 150 while exhausting air, thereby completely extinguishing the arc, and further improving the arc extinguishing performance of the switching unit 100.

One or more screens 150 may be disposed on the same air outlet channel 112, for example, fig. 2, 3 and 14 show an embodiment in which three stacked screens 150 are disposed on the same air outlet channel 112, it should be understood that when the number of screens 150 increases, the arc extinguishing capability may be further improved, but at the same time, the smoothness of the air flow discharge will be reduced, so that, in actual setting, the effect may be reasonably balanced according to the needs, thereby determining the number of screens 150 required. Of course, in actual arrangement, two adjacent filter screens 150 may be spaced apart from each other or may be stacked next to each other.

Referring to fig. 14, the filter 150 is a metal filter 150, such as an iron wire filter 150, a copper wire filter 150, an aluminum wire filter 150, etc., so that when the gas is discharged through the filter 150, the metal filter 150 can absorb and neutralize the electric particles attached to the gas, thereby enhancing the gas outlet dissociation effect and reducing the electric arc spraying.

Fig. 15 to 25 illustrate another switching unit 100 of a double breakpoint structure according to an embodiment of the present application, which is different from the switching unit 100 of the double breakpoint structure illustrated in fig. 2 to 6 in one of the following points: the magnets 140 may be changed from the "upright state" shown in fig. 2 to 14 to the "lying state", in other words, the poles of each magnet 140 in the same group are respectively located on opposite sides of the magnet 140, and the connection line direction of the poles of each magnet 140 is approximately perpendicular to the rotation plane of the moving contact 130 (the connection line direction of the poles of each magnet 140 shown in fig. 2 to 14 is approximately parallel to the rotation plane of the moving contact 130). Thus, when the magnet 140 applies a force to the arc generated between the moving and stationary contacts, the force is parallel or approximately parallel to the plane of rotation of the moving contact 130, rather than the plane of rotation of the vertical or approximately vertical moving contact 130 shown in fig. 2-4. Accordingly, the magnetic field generated by the magnet 140 can be used to guide the arc generated between the moving contact and the fixed contact to move in the direction away from the moving contact rotation axis a, so that the arc striking area of the arc (that is, the longer the distance from the moving contact rotation axis a is, the longer the corresponding arc length is) is increased, and the arc extinguishing effect is improved.

As shown in fig. 15 to 18, in order to further improve the arc extinguishing effect, an arc extinguishing chamber 170 may be further disposed at the outer side of the arc rotating path b, and an inlet 172 of the arc extinguishing chamber 170 corresponds to the arc rotating path b, thereby facilitating the introduction of the arc by the magnetic field to the arc, so that the arc can smoothly enter the interior of the arc extinguishing chamber 170 from the inlet 172 of the arc extinguishing chamber 170, and the arc extinguishing effect is improved by means of the arc extinguishing capability of the arc extinguishing chamber 170.

As shown in fig. 15, 16 and 18, the arc extinguishing chamber 170 has an inlet 172 and an outlet 171 which are communicated with each other, and the inlet 172 of the arc extinguishing chamber 170 is located at a side of the arc extinguishing chamber 170 close to the arc rotating path b, and the outlet 171 of the arc extinguishing chamber 170 is located at a side of the arc extinguishing chamber 170 facing away from the arc rotating path b, whereby, after the arc enters the inside of the arc extinguishing chamber 170 from the inlet, quenching of the arc is accelerated by the action of the arc extinguishing chamber 170, and a large amount of high temperature and high pressure quenching gas is generated in the process, as shown in fig. 16, and the quenching gas 114 is ejected outwards through the outlet 171 of the arc extinguishing chamber 170, as shown in fig. 15, and then is ejected outwards through the gas outlet 113 under the guidance of the gas outlet passage 112 on the unit housing 110.

As shown in fig. 24, the arc extinguishing chamber 170 includes an arc extinguishing housing and a plurality of connecting members 174 located in the arc extinguishing housing, wherein the connecting members may be a grid sheet, a barrier rib, etc., and the grid sheet may be a metal material, and the barrier rib may be a gas generating material. The plurality of connectors 174 are arranged at intervals to form a plurality of passages, so that when the connectors 174 are grid plates, the metal grid plates can be utilized to separate and cool the electric arc and the pressure drop is regulated, and the generated arc extinguishing gas 114 is guided to enter the gas outlet channel 112 continuously by the plurality of passages in the arc extinguishing process; when connecting piece 174 is the rib that separates, can utilize the rib that separates of gas production material to play the effect of elongating to play gas production, cooling effect to the electric arc, when adopting the rib that separates, also can make to separate rib and explosion chamber casing integrated into one piece, thereby convenient assembly.

In one embodiment, the arc extinguishing chamber 170 gradually decreases in size from the inlet 172 to the outlet 171, thereby enabling the arc to be in sufficient contact with the arc extinguishing chamber 170 and enhancing the arc extinguishing effect. For example, as shown in fig. 16, the arc extinguishing chamber 170 may be formed by connecting upper and lower plates, between which a passage for arc extinguishing is formed, and the interval between the upper and lower plates is gradually reduced in a direction from the inlet 172 to the outlet 171, thereby achieving a gradual reduction in the size of the passage.

As shown in fig. 16, the number of arc extinguishing chambers 170 may be set in a one-to-one matching manner according to the number of moving and static contact groups. To enhance the arc extinguishing effect, as shown in fig. 15 and 16, the edge of the contact holder 160 may be made to protrude into the arc extinguishing chamber 170 through the inlet 172 of the arc extinguishing chamber 170. The entrance 172 of the arc chute 170 may be arranged in an arc shape to match the arc-shaped rotation path b.

Since the arc extinguishing chambers 170 are provided outside the arc-shaped rotation path b, the arc extinguishing chambers 170 and the magnet group corresponding to the same group of moving contacts may be stacked along the rotation axis a of the moving contact. For example, as shown in fig. 16, 21 and 24, the magnet assembly is located below the arc extinguishing chamber 170, and in fig. 16, the arc extinguishing chamber shields the magnet assembly, so the magnet assembly is not shown, and in fig. 21 and 24, the magnet assembly of the pair below the arc extinguishing chamber 170 is shown in a dotted line form.

In some embodiments, as shown in fig. 17, in order to further reduce the thickness of the stack, the unit case 110 may be thinned such that the magnet 140 is embedded in the outer wall of the arc extinguishing chamber 170, in other words, an embedded groove 173 is provided on the outer wall of the arc extinguishing chamber 170, and the magnet 140 is correspondingly embedded in the embedded groove 173, thereby achieving the reduction of the thickness of the stack. Of course, in other embodiments, the magnet 140 may not be embedded in the arc chute 170, and may be located above or below the arc chute 170.

In order to effectively increase the length of the arc, as shown in fig. 19, a first arc striking member 181 and a second arc striking member 182 may be further disposed respectively, where one end of the first arc striking member 181 is connected with the fixed contact 120, and the other end extends toward the direction of the arc extinguishing chamber 170, and the second arc striking member 182 is located at the opening position of the moving contact 130 and also extends toward the direction of the arc extinguishing chamber 170, in other words, the first arc striking member 181 is connected with the fixed contact 120 and extends toward the direction away from the moving contact rotation axis a, and the second arc striking member 182 is located at the opening position of the moving contact 130 and extends toward the direction away from the moving contact, and by extending the first arc striking member 181 and the second arc striking member 182, the distance of the arc striking can be increased. Therefore, after an arc is generated between the moving contact and the fixed contact, one end of the arc gradually moves from the fixed contact 120 to the extending end of the first striking member 181 in a direction away from the moving contact rotation axis a, and as the moving contact 130 moves to the opening position (as shown by the moving contact in fig. 21 or 24), the other end of the arc gradually moves from the second striking member 182 to the extending end of the second striking member 182 in a direction away from the moving contact rotation axis a, so that the arc between the extending end of the first striking member 181 and the extending end of the second striking member 182 is further away from the rotation center of the moving contact 130, thereby having a longer arc-striking length and helping to accelerate the extinction of the arc.

In one embodiment, as shown in fig. 20, three magnets 140 are shown distributed outside the same arc-shaped rotation path b, each magnet 140 is in a lying state, so that two poles are respectively located on the top surface and the bottom surface of the magnet 140, as shown in fig. 20, the polarities of two adjacent magnets 140 are opposite, thereby forming that the N pole of the first magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown) which is blocked, the S pole of the second magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown) which is blocked, and the N pole of the third magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown) which is blocked. Thus, referring to fig. 21, the switch unit includes left and right magnet groups when having polarities, and when the magnetic fields generated by the three magnets act on the arc d, the magnetic field generated by one magnet 140 generates a leftward force F1 on the arc d, the magnetic field generated by the other magnet 140 generates a rightward force F2 on the arc d, and the magnetic field generated by the other magnet 140 generates a leftward force F3 on the arc d, so that the arc d is stretched to form a similar zigzag shape, the length of the zigzag shape is lengthened, and the extinguishing speed of the zigzag shape is accelerated, and the arc can be further elongated by combining the connecting piece 174. For the right magnet assembly (also composed of three magnets), since the switch unit has polarity, as shown in fig. 21, the S pole forming the first magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown), the N pole of the second magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown), the S pole of the third magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown), when the right magnet assembly acts on the arc d, the magnetic field generated by one magnet 140 generates a rightward force F1 on the arc d, the magnetic field generated by the other magnet 140 generates a leftward force F2 on the arc d, and the magnetic field generated by the other magnet 140 generates a rightward force F3 on the arc d, thereby stretching the arc d to form a similar fold line shape, lengthening the length thereof, accelerating the extinguishing speed thereof, and further elongating the arc by the coupling member 174.

When the switch unit has no polarity, the polarity of the wiring is not required, which contributes to the improvement of convenience of the wiring, and correspondingly, as shown in fig. 22, the switch unit is also provided with the magnet groups on the left and right sides, and the polarity distribution and the action arc effect of the magnet groups on the left side of the switch unit with polarity are consistent with those of the magnet groups on the left side of the switch unit with polarity. For the right magnet assembly, as shown in fig. 22, the N pole of the first magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown), the S pole of the second magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown), the N pole of the third magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown), when the right magnet assembly acts on the arc d, the magnetic field generated by one magnet 140 generates a leftward acting force F1 on the arc d, the magnetic field generated by the other magnet 140 generates a rightward acting force F2 on the arc d, and the magnetic field generated by the other magnet 140 generates a leftward acting force F3 on the arc d.

In one embodiment, as shown in fig. 23, three magnets 140 distributed outside the same arc-shaped rotation path b are shown, each magnet 140 is in a lying state, so that two poles are respectively located on the top surface and the bottom surface of the magnet 140, as shown in fig. 23, the polarities of two adjacent magnets 140 are the same, thereby forming that the N pole of the first magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown) which is blocked, the N pole of the second magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown) which is blocked, and the N pole of the third magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown) which is blocked. Thus, referring to fig. 24, the switch unit includes left and right magnet groups when having polarities, and when the magnetic fields generated by the three magnets 140 respectively act on the arc d (three magnet groups are distributed in fig. 23), the magnetic field generated by one magnet 140 generates a leftward acting force F1 on the arc d, the magnetic field generated by the other magnet 140 generates a leftward acting force F2 on the arc d, the magnetic field generated by the other magnet 140 generates a leftward acting force F3 on the arc d, and in view of the basis that the polarities of the three magnetic fields are the same, the three acting forces of the three magnetic fields acting on the arc d are all leftward to enhance the arc blowing capability on the arc d, and the connecting piece 174 can further elongate the arc, thereby accelerating the extinguishing speed thereof. For the right magnet assembly (also composed of three magnets), since the switch unit has polarity, as shown in fig. 24, the S pole forming the first magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown), the S pole forming the second magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown), the S pole forming the third magnet 140 is located on the top surface, the N pole is located on the bottom surface (not shown), when the right magnet assembly acts on the arc d, the magnetic field generated by one magnet 140 generates a rightward acting force F1 on the arc d, the magnetic field generated by the other magnet 140 generates a rightward acting force F2 on the arc d, the magnetic field generated by the other magnet 140 generates a rightward acting force F3 on the arc d, and in view of the same polarity of the three magnetic fields, the three acting forces on the arc d all act rightward to strengthen the arc blowing ability of the arc d, and the coupling 174 can be further elongated to accelerate the extinguishing speed of the arc.

When the switch unit has no polarity, the polarity of the wiring is not required, which contributes to the improvement of convenience of the wiring, and correspondingly, as shown in fig. 25, the magnet groups on the left and right sides are also arranged in the switch unit, and the polarity distribution and the action arc effect of the magnet group on the left side are consistent with those of the magnet group on the left side of the switch unit with polarity. For the right magnet assembly, as shown in fig. 25, the N pole of the first magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown), the N pole of the second magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown), the N pole of the third magnet 140 is located on the top surface, the S pole is located on the bottom surface (not shown), when the right magnet assembly acts on the arc d, the magnetic field generated by one magnet 140 generates a leftward acting force F1 on the arc d, the magnetic field generated by the other magnet 140 generates a leftward acting force F2 on the arc d, and the magnetic field generated by the other magnet 140 generates a leftward acting force F3 on the arc d.

Similarly, in the embodiment in which the magnet is in the "standing state", the switch unit may be polar or non-polar, which will not be described in detail herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (16)

1. A switching unit (100), characterized by comprising: the device comprises a unit shell (110), and a moving contact (130), a fixed contact (120) and at least two magnets (140) which are arranged in the unit shell (110), wherein the moving contact (130) is rotationally arranged in the unit shell (110) to form an arc-shaped rotating path matched with the closing and opening of the fixed contact (120), the at least two magnets (140) are distributed on the outer side of the arc-shaped rotating path, and the at least two magnets (140) are sequentially distributed at intervals along the arc-shaped rotating path.

2. The switching unit (100) according to claim 1, wherein the at least two magnets (140) comprise at least one first magnet (141) and at least one second magnet (142), the first magnet (141) and the second magnet (142) being of opposite polarity.

3. The switching unit (100) according to claim 2, wherein the first magnets (141) and the second magnets (142) are alternately distributed.

4. A switch unit (100) according to claim 2 or 3, wherein the switch unit (100) further comprises a lower plate (161) and an upper plate (162) which are stacked in the direction of the rotation axis of the movable contact (130) to form a nip, the movable contact (130) being disposed in the nip, and the stationary contact (120) having an extension portion extending to the nip to be located on the arc-shaped rotation path.

5. The switching unit (100) according to claim 1, wherein the polarities of adjacent two of the magnets (140) are identical.

6. The switch unit (100) according to claim 5, wherein the switch unit (100) further comprises a base plate provided in a stacked relation with the moving contact (130) in a direction of a rotation axis of the moving contact (130) such that a force of the magnet (140) acting on an arc between the moving contact (130) and the stationary contact (120) is directed toward the base plate.

7. The switching unit (100) of claim 2, 3 or 5, wherein one pole of each magnet (140) is located on a side of the magnet (140) facing the arcuate rotational path and the other pole is located on the other side of the magnet (140) facing away from the arcuate rotational path.

8. The switching unit (100) according to claim 2, 3 or 5, wherein the poles of each magnet (140) are located on opposite sides of the magnet (140), respectively, and the direction of the connection of the poles of each magnet (140) is approximately perpendicular to the rotation plane of the movable contact (130).

9. The switching unit (100) according to claim 8, wherein an arc extinguishing chamber (170) is further provided outside the arc-shaped rotation path, an inlet (172) of the arc extinguishing chamber (170) corresponding to the arc-shaped rotation path for the magnet (140) to guide an arc between the moving contact (130) and the stationary contact (120) into the arc extinguishing chamber (170) through the inlet (172) of the arc extinguishing chamber (170).

10. The switching unit (100) according to claim 9, wherein the switching unit (100) further comprises a first striking member (181) and a second striking member (182), the first striking member (181) being connected with the stationary contact (120) and extending towards the arc extinguishing chamber (170), the second striking member (182) being located at a breaking position of the moving contact (130) and extending towards the arc extinguishing chamber (170).

11. The switching unit (100) of claim 9, wherein the at least two magnets (140) are embedded in an outer wall of the arc chute (170).

12. The switching unit (100) according to claim 1, 2, 3, 5 or 6, wherein the at least two magnets (140) are located in a rotation plane of the moving contact (130).

13. The switch unit (100) of claim 1, wherein the switch unit (100) further comprises a filter screen (150) and an air outlet channel (112) disposed in the unit housing (110) and communicating with the outside of the unit housing (110), and one end of the air outlet channel (112) extends to the arc-shaped rotation path.

14. The switching unit (100) of claim 13, wherein the screen (150) is a metal screen (150).

15. The switch unit (100) of claim 1, wherein a side of the magnet (140) adjacent to the arcuate rotation path is an arcuate surface or plane.

16. A rotary isolating switch (010), comprising an actuating mechanism (030) and a switch body (020), wherein the switch body (020) comprises a plurality of switch units (100) according to any one of claims 1 to 15, a plurality of switch units (100) are sequentially stacked, and the actuating mechanism (030) is in driving connection with each moving contact (130) to drive the moving contacts (130) of a plurality of switch units (100) to rotate synchronously.