CN217086445U - Rotary switch for electric appliance - Google Patents

Abstract

The utility model provides a rotation type electrical apparatus switch. The rotary electric switch is composed of a single unit group or a plurality of unit groups in a laminated mode, each unit group at least comprises a moving contact, a fixed contact, an insulating shell and a moving contact insulating support, at least one electric arc channel opposite to the moving direction of the moving contact is arranged in front of the moving contact, and the length of each electric arc channel is at least the moving length of the moving contact. The utility model discloses a rotary electrical apparatus switch can break the electric arc reliably under higher rated voltage (for example 1000V to 1500V direct current voltage) and higher rated current (for example 60A).

Description

Rotary switch for electric appliance

Technical Field

The utility model relates to an electrical apparatus switch field, concretely relates to rotation type electrical apparatus switch.

Background

The rotary electric switch is used for switching on or switching off current flow in a power-on state, so that parts needing power failure in the power distribution device are reliably isolated from electrified parts. Rotary electrical switches are widely used in electrical power systems, such as photovoltaic, wind power, etc. For example, in a photovoltaic system, the smaller currents generated in each photovoltaic cell are combined in parallel or in series to provide the current or total power required by the utilization system. In existing photovoltaic systems, rotary electrical switches are typically utilized for the purpose of individually isolating, protecting and disconnecting each photovoltaic cell.

At present, rotary electrical switches of known type are generally constituted by one or more modular contact modules, each contact module generally comprising a rotatable contact and a pair of fixed contacts. When the moving contact and the static contact are separated, electric arcs can be generated, the electric arcs not only can greatly damage the contacts, but also can prolong the time for breaking the circuit, hidden dangers are brought to the use of the isolating switch and load equipment, and therefore arc extinguishing chambers are often arranged in all switch units for arc extinguishing.

With the continuous development of new energy industries such as photovoltaic and the like, the current and the voltage in a main loop of a system are continuously improved, and in some known rotary electrical switches, the existing rotary electrical switches cannot meet the isolation requirement of system power failure. Some rotary electric switches utilize floating electrodes to improve the capacity of breaking electric arcs, but the breaking effect is not obvious; some rotary electrical switches increase the breakpoint to improve rated current by connecting the fixed contacts of different contact modules of the rotary electrical switch in series, but this usage will reduce the usage loop of the rotary electrical switch, resulting in the increase of the usage amount of the rotary electrical switch, and increasing the occupied space of the rotary electrical switch in the system.

There is therefore a need for an improved rotary electrical switch and a contact module for the same.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotary electrical apparatus switch, this rotary electrical apparatus switch can divide disconnected electric arc reliably under higher rated voltage (for example DC voltage 1000V to 1500V) and higher rated current (for example 60A).

In order to realize the above-mentioned utility model purpose, the utility model provides a rotation type electrical switch, by single unit group or the range upon range of constitution of a plurality of unit groups, every including moving contact, static contact, insulating casing and moving contact insulating support in the unit group at least, the place ahead of moving contact set up at least one with moving contact opposite direction of motion's arc passageway, the extension length of arc passageway does at least the length of moving contact motion.

As a further improvement of the present invention, the fixed contact includes a first contact member and a second contact member, the first contact member includes a first wiring end and a first contact conductive end corresponding to the movable contact, the first wiring end is located on one side of a plane a passing through the unit group axis, and the first contact conductive end is located on the other side of the plane a; the second contact member comprises a second terminal and a second contact conductive end corresponding to the movable contact; the second terminal is located on the other side of the plane A, and the second contact conductive end is located on one side of the plane A.

As a further improvement of the present invention, a fixed contact is further disposed in the unit group, the fixed contact includes a third contact member and a fourth contact member, the third contact member is provided with a third terminal and a third contact conductive end in contact with the movable contact, and the third terminal and the third contact conductive end are disposed on the same side of a plane a passing through the axis of the unit group; the fourth contact member is provided with a fourth terminal and a fourth contact conducting terminal which is in contact with the moving contact, and the fourth terminal and the fourth contact conducting terminal are arranged on the same side of the plane A.

As a further improvement of the present invention, the rotary electrical switch includes at least two sets of the unit set, at least two sets of the unit set is combined vertically and at least two sets of the unit set, wherein the moving contact and the static contact are contacted or disconnected simultaneously.

As a further improvement of the utility model, when having the static contact the unit group with have the static contact the unit group is when range upon range of setting from top to bottom, first contact in the static contact electrically conducts the end with the electrically conductive end of third contact in the static contact overlaps or non-overlapping setting, second contact in the static contact electrically conducts the end with the electrically conductive end of fourth contact in the static contact overlaps or non-overlapping setting.

As a further improvement, when having the static contact the unit group with have the static contact the range upon range of setting from top to bottom of unit group, and be located the same end of rotation type electrical switch first contact in the static contact electrically conductive end with third contact in the static contact electrically conductive end in the static contact second contact electrically conductive end with when the non-overlapping setting of fourth contact electrically conductive end in the static contact, first contact electrically conductive end with distance between the electrically conductive end of third contact is less than 25mm, second contact electrically conductive end with distance between the electrically conductive end of fourth contact is less than 25 mm.

As a further improvement, when having the static contact the unit group with have the static contact the range upon range of setting from top to bottom of unit group, and be located the same end of rotation type electrical apparatus switch the electrically conductive end of first contact in the static contact with the electrically conductive end of third contact in the static contact the electrically conductive end of second contact in the static contact with the electrically conductive end symmetry setting of fourth contact in the static contact.

As a further improvement of the present invention, the external exhaust port of the arc channel is located between the moving contact and the front of the separation position of the static contact and the moving length of the moving contact is within 60%.

As a further improvement of the present invention, the rotary electrical switch further includes an extension arc channel, the extension arc channel is a self the end portion extended by the arc channel is extended to the opposite direction.

As a further improvement of the present invention, the extension arc channel is a self the end portion extending from the arc channel is turned back toward the front of the position is opened by the moving contact.

As a further improvement, the rotary electrical switch further comprises an arc extinguish chamber, the arc extinguish chamber is arranged in the front of the moving contact, and at least one arc channel is arranged in the front of the arc extinguish chamber.

As a further improvement of the present invention, the arc channel is located the insulating housing with the moving contact or the insulating housing with between the arc extinguishing chamber, just the arc channel is certainly the place ahead of moving contact is followed the tangential direction of moving contact motion extends.

As a further improvement of the utility model, be provided with the permanent magnet on the explosion chamber.

As a further improvement of the utility model, be provided with the permanent magnet on the insulating casing.

As a further improvement, the moving contact insulating support is provided with a permanent magnet.

As a further improvement of the utility model, the static contact is provided with the permanent magnet on or/and around the static contact.

As a further improvement of the utility model, be provided with the permanent magnet on the movable contact.

As a further improvement of the utility model, permanent magnets are arranged around the arc extinguish chamber.

As a further improvement, the arc extinguish chamber is provided with permanent magnets on the moving contact insulating support and on the static contact around the static contact, on the moving contact and in the arc extinguish chamber around at least one or more places.

The beneficial effects of the utility model reside in that: the utility model discloses a rotary electric switch, through being provided with permanent magnet, explosion chamber in the unit group, and set up the striking structure on the static contact, set up the electric arc passageway that length is more than or equal to the length of moving contact movement track in the unit group simultaneously, make the electric arc that produces when the moving contact in the unit group separates with the static contact that corresponds can more fast and get into in the explosion chamber; even if the voltage and the current in the system are larger, and the electric arc cannot be extinguished in the arc extinguish chamber, the electric arc is further accelerated to be cooled while being elongated along the electric arc channel by the form of the electric arc channel, then the electric arc is controlled to be extinguished in the electric arc channel in the switch, the electric arc is prevented from overflowing to the outside of the switch, the effect that no arc flashover exists outside the switch is achieved, particularly in places with higher voltage and current in the system, the safety of the switch is effectively improved, even if the distance between components around the switch and the switch is kept smaller, arc extinction and zero arc flashover can be achieved, and the using space of the system is greatly saved.

Furthermore, the utility model discloses a rotary electrical switch, through setting up the use of the stack assembly about multiunit group, and when control unit group stack use, the electrically conductive end of contact in the static contact in each unit group overlaps the setting from top to bottom, makes the assembly position of the moving contact in each unit group all unanimous, has reduced the error rate of assembly greatly, has improved whole assembly efficiency; when the unit groups are stacked for use, the contact conductive ends of the static contacts in each unit group are controlled not to be overlapped, so that the distance between the contact conductive ends of the static contacts in two adjacent unit groups is effectively increased, and the breaking reliability and safety under the conditions of higher voltage and higher current are facilitated.

Drawings

Other features, objects and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like or similar reference characters identify the same or similar features. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view of the overall structure of the rotary electric switch of the present invention.

Fig. 2 is a schematic diagram of the internal structure of a unit cell in fig. 1.

Fig. 3 is a schematic structural diagram of a combination of a fixed contact, a movable contact, and an insulating housing according to an embodiment.

Fig. 4 is a schematic structural diagram of a combination of the fixed contact, the movable contact, and the insulating housing in the second embodiment.

Fig. 5 is a schematic structural view of the first contact member and the third contact member in the stationary contact.

Fig. 6 is a schematic structural view of a second contact member and a first contact member in a stationary contact.

Fig. 7 is a schematic diagram illustrating a positional relationship between fixed contacts in two sets of unit groups stacked up and down in an embodiment.

Fig. 8 is a schematic diagram illustrating a positional relationship between fixed contacts in two sets of unit groups stacked up and down in another embodiment.

Fig. 9 is a schematic structural diagram of the movable contact insulating support.

Fig. 10 is a schematic structural view of the insulating support of the movable contact shown in fig. 9 at another angle.

Fig. 11 is a schematic diagram of the position relationship of the permanent magnet in the insulating shell.

Fig. 12 is a schematic structural diagram of the moving contact insulating support when the permanent magnet is disposed in the moving contact insulating support.

Fig. 13 is a schematic structural view of the arc path and the extended arc path of the present invention.

Fig. 14 is a schematic structural view of an arc channel and a fixed contact in the first embodiment of the present invention.

Fig. 15 is a schematic structural view of the combination of the arc channel in fig. 14 and the stationary contact in the second embodiment.

Fig. 16 is a schematic view of an external operating mechanism used in combination with a rotary electrical switch.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but covers any modification, replacement or improvement of elements, components and algorithms without departing from the spirit of the present invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

The following describes a multi-group stacked rotary electrical switch according to an embodiment of the present invention in detail with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, a rotary switch 100 of the present invention can be used in an electrical circuit, such as a dc circuit and an ac circuit. The rotary electric switch 100 is formed by stacking a single unit set or a plurality of unit sets, and each unit set of the rotary electric switch 100 at least comprises a moving contact 1, a fixed contact 2 (or a fixed contact 2'), an insulating shell 3, a moving contact insulating support 4 and an arc extinguish chamber 5.

Moving contact 1 is acceptd at insulating casing 3 and is connected with moving contact insulating support 4 drive the utility model discloses well moving contact 1 includes at least that can rotate and contact or disconnected moving contact (not reference numeral) with static contact 2 by the drive of moving contact insulating support 4.

Referring to fig. 2, the stationary contact 2 is accommodated in the insulating housing 3 and located beside the movable contact 1. The stationary contact 2 comprises a first contact member 21 and a second contact member 22. The first contact member 21 comprises a first terminal 210 and a first contact conductive end 211 corresponding to the movable contact 1; the second contact member 22 includes a second terminal 220 and a second contact terminal 221 corresponding to the movable contact 1.

The first terminal 210 and the second terminal 220 are respectively connected to an external conductor, and the connection manner may be any one or two of welding, riveting, inserting, or screwing. Further, when the first contact terminal 211 and the second contact terminal 221 are in contact with the moving contact 1, respectively, a main circuit in the system is in a conducting state, so that normal operation of the system can be ensured.

Fig. 3 is a schematic structural diagram of a static contact 2 according to a first embodiment of the present invention. The first terminal 210 is disposed at one side of the plane a and the first contact conductive terminal 211 is disposed at the other side of the plane a; the second terminal 220 is disposed on the other side of the plane a, and the second contact conductive terminal 221 is disposed on one side of the plane a; the first terminal 210 and the first contact terminal 211 are located on the same side of the central axis L of the plane a, and the second terminal 220 and the second contact terminal 221 are located on the other side of the central axis L opposite to the first terminal 210 and the first contact terminal 211.

Fig. 4 is a schematic structural diagram of a static contact 2' according to a second embodiment of the present invention. In this embodiment, the static contact 2 'includes a third contact member 21' and a fourth contact member 22 ', the third contact member 21' is provided with a third terminal 210 'and a third contact conducting end 211' contacting with the dynamic contact 1, the third terminal 210 'and the third contact conducting end 211' are respectively disposed on two sides of the plane a, and the third terminal 210 'and the third contact conducting end 211' are located on the same side of the central axis L; the fourth contact member 22 ' is provided with a fourth terminal 220 ' and a fourth contact conducting end 221 ' contacting with the movable contact 1, the fourth terminal 220 ' and the fourth contact conducting end 221 ' are respectively arranged on two sides of the plane a, and the fourth terminal 220 ' and the fourth contact conducting end 221 ' are located on the other side of the central axis L opposite to the third terminal 210 ' and the third contact conducting end 211 '.

Referring to fig. 5 and 6, the first contact member 21, the third contact member 21 ', the second contact member 22 and the fourth contact member 22' are further provided with a first arc-guiding portion 212 and a second arc-guiding portion 222, respectively. Specifically, the extending end portions of the first contact conducting end 211, the second contact conducting end 221, the third contact conducting end 211 'and the fourth contact conducting end 221' are all arranged in a horn-shaped protrusion with an angle a, and the first arc-guiding portion 212 is formed by extending from one side of the first contact conducting end 211 and the third contact conducting end 211 'far away from the movable contact 1 along the extending direction of the first contact conducting end 211 and the third contact conducting end 211'; the second arc-striking portion 222 is formed by extending from a side of the second contact terminal 221 and the fourth contact terminal 221 'away from the movable contact 1 along an extending direction of the second contact terminal 221 and the fourth contact terminal 221', the first arc-striking portion 212 and the second arc-striking portion 222 are both disposed at an acute angle of B, and the angle a is greater than the angle B. In this way, the first arcing part 212 can be made to be away from the first contact terminal 211 and the third contact terminal 211' in the radial direction of the rotation of the movable contact 1; the second arc ignition portion 222 is far from the second contact terminal 221 and the fourth contact terminal 221' in the radial direction of the rotation of the movable contact 1, which is more favorable for the arc to move in the direction far from the arc starting point of the arc, i.e. in the direction of the arc extinguishing chamber 5 in the unit set.

When the rotary electrical switch 100 is used, the rotary electrical switch 100 may only be provided with one group of unit sets in a system main loop, at this time, the fixed contact 2 in the group of unit sets may be set as the setting form in the first embodiment, or may be set as the setting form of the fixed contact 2' in the second embodiment, and at this time, the bottom of the group of unit sets may be provided with an installation structure, so as to install the rotary electrical switch 100 on a component or a device, such as an installation rail of a power distribution cabinet.

When a plurality of sets of the unit sets are simultaneously disposed in the rotary electrical switch 100, each set of the unit sets is stacked together as an installation module of the rotary electrical switch 100 and is connected to a main loop of a system for use, wherein each set of the unit sets can be correspondingly used in one loop, but two or more sets of the unit sets can also be used in one loop according to requirements of cutting off current, voltage and the like.

Further, when the rotary electric switch 100 is simultaneously stacked with a plurality of sets of the unit sets, the static contacts 2 in each set of the unit sets can be combined up and down in the first embodiment and the second embodiment.

Referring to fig. 7, when two sets of the cell groups respectively having the fixed contact 2 and the fixed contact 2 ' are vertically combined, the first contact conductive end 211 and the third contact conductive end 211 ' arranged in the two sets of the cell groups stacked vertically are overlapped or not overlapped, and the second contact conductive end 221 and the fourth contact conductive end 221 ' are overlapped or not overlapped; and when the two first contact conductive ends 211, the third contact conductive end 211 'and the two second contact conductive ends 221, the fourth contact conductive end 221' which are positioned on the same side of the two adjacent layers of the cell groups are arranged in a non-overlapping manner, the distance between the two first contact conductive ends 211 and the third contact conductive end 211 'is less than 25mm, and the distance between the two second contact conductive ends 221 and the fourth contact conductive end 221' is less than 25 mm.

That is, in the actual use process, the combination form between the fixed contacts 2 and 2 'in the two sets of the unit groups that are combined adjacently up and down may be flexibly selected according to the space requirement, and the combination form between the fixed contacts 2 and 2' in the two sets of the unit groups in this specification and the drawings is only exemplary and should not be limited thereto.

Referring to fig. 8, when two cell sets are combined up and down, and the two first contact conductive terminals 211, the third contact conductive terminal 211 ', the two second contact conductive terminals 221, and the fourth contact conductive terminal 221' located on the same side of the stacked cell sets are disposed in a non-overlapping manner, the two first contact conductive terminals 211, the third contact conductive terminal 211 ', the two second contact conductive terminals 221, and the fourth contact conductive terminal 221' may also be disposed symmetrically.

Further, when a plurality of sets of the unit sets are stacked, the bottom of the unit set at the bottom end of the rotary electric switch 100 is also provided with a mounting structure, so as to mount the rotary electric switch 100, in which a plurality of sets of the unit sets are stacked, on a component or a device, such as a mounting rail of a power distribution cabinet.

At least a first insulating wall 31, a second insulating wall 32, a third insulating wall 33 and a fourth insulating wall 34 are arranged inside the insulating housing 3, and the insulating housing 3 is further provided with a first external air outlet 311 on the first insulating wall 31 and a second air outlet 331 on the third insulating wall 33 (see fig. 2).

Referring to fig. 9 and 10, the moving contact insulating support 4 is used for supporting the moving contact 1 and the arc extinguish chamber 5, and driving the moving contact 1 to move, so as to control the moving contact 1 to contact with or separate from the stationary contact 2. The moving contact insulating support 4 is provided with a convex structure 41 and/or a concave structure 42 which are used for connecting the moving contact insulating supports 4 in other unit groups which are arranged in an up-down stacked mode.

Specifically, two sets of stacked units are provided with the protruding structure 41 at the upper end of the movable contact insulating support 4, the lower end of the movable contact insulating support is provided with the concave structure 42, the protruding structure 41 is coaxial with the center of the concave structure 42, when a plurality of units are stacked up and down, the protruding structure 41 at the upper end of the unit below and the concave structure 42 at the lower end of the unit above can be matched with each other to realize multi-layer transmission connection of the movable contact insulating support 4 between the units, so as to conveniently perform synchronous control on the units, control the movable contacts 1 to rotate synchronously, and realize simultaneous connection and disconnection of the movable contacts 1 and the fixed contacts 2 and 2' in different units. Preferably, the convex structure 41 and the concave structure 42 are both non-circular, so that relative rotation can be effectively prevented when two adjacent moving contact insulating supports 4 are combined.

In fact, when a fault, an overhaul, or the like occurs in the system, the movable contact insulating support 4 may rotate counterclockwise under the driving of an external force, so as to control the movable contact 1 to be separated from the first contact member 21, the first contact conducting end 211 of the third contact member 21 ', the third contact conducting end 211', the second contact member 22, and the second contact conducting end 221 and the fourth contact conducting end 221 'of the fourth contact member 22', and at this time, an electric arc may be generated between the movable contact 1 and the stationary contacts 2 and 2 ', and in fact, when the voltage and the current in the system are larger, the electric arc energy is larger, the movable contact 1 and the stationary contacts 2 and 2' are more difficult to be disconnected, and therefore, an arc extinguishing chamber 5 is further disposed in front of the movable contact 1 in each unit group.

Arc extinguishing chamber 5 joint is in between moving contact insulating support 4, arc extinguishing chamber 5 is provided with the arc extinguishing bars piece, the arc extinguishing bars piece generally is metal magnetic conduction material, is fan-shaped to be arranged basically, and electric arc can produce the drive power to 5 movements of arc extinguishing chamber under the effect of atmospheric pressure and self-excitation field, and after electric arc got into arc extinguishing chamber 5, can be cut into a plurality of electric arc sections, is cooled off by the metal bars piece simultaneously, and electric arc voltage can rise fast, and when electric arc voltage was higher than the voltage between moving contact 1 and the static contact 2, electric arc can extinguish. However, when the voltage and current in the system are too large, the arc extinguishing capability is limited when the arc extinguishing chamber 5 is used for arc extinguishing, and therefore, the permanent magnet 6 is further arranged in the unit group to increase the driving speed of the arc moving to the arc extinguishing chamber 5, and simultaneously, the arc enters the arc extinguishing chamber 5 more, so as to achieve the effect of rapid arc extinguishing.

As shown in fig. 11 and 12, a plurality of permanent magnets 6 are simultaneously provided, the plurality of permanent magnets 6 are respectively provided at the separation starting positions of the movable contact 1 and the first contact member 21, the third contact member 21 ', the second contact member 22 and the fourth contact member 22', and the maximum separation position of the movable contact 1 from the first contact member 21, the third contact member 21 ', the second contact member 22 and the fourth contact member 22', and one permanent magnet 6 is provided at each position. Further, a groove 31 for placing the permanent magnet 6 is also arranged in the insulating shell 3.

Similarly, for the purpose of further achieving the arc blowing of the permanent magnet 6, the permanent magnet 6 may also be disposed around the arc extinguish chamber 5, wherein the circumference of the arc extinguish chamber 5 includes 6 azimuth positions, namely, upper, lower, left, right, front and back positions; certainly in other embodiments of the present invention, the permanent magnet 6 may also be disposed on the moving contact 1, the moving contact insulating support 4, and the static contact 2, 2', and the permanent magnet 6 may be embedded in the above-mentioned part/structure or disposed closely to the surface of the above-mentioned part/structure.

It should be noted that, in order to better achieve the arc extinguishing effect, designers may use the positions of the permanent magnets 6 in any combination according to needs, and when the voltage and the current to be broken in the main circuit are relatively small, any one of the position schemes may be selected, and when the voltage and the current to be broken in the main circuit are relatively large, two or even more than two position schemes may be selected. Of course, when the voltage and current to be divided in the main circuit are small to some extent, the permanent magnet 6 may not be provided.

The rotary electric appliance switch 100 further comprises an arc channel 7. In a preferred embodiment of the present invention, the arc channel 7 is disposed in front of the arc extinguishing chamber 5, and the direction of the arc channel 7 is opposite to the moving direction of the moving contact 1. The number of the arc channels 7 is 2, and the arc channels are located on two sides of the plane a, specifically, the two arc channels 7 are respectively surrounded by the first insulating wall 31, the second insulating wall 32, the third insulating wall 33, and the fourth insulating wall 34, and the length of each arc channel 7 is at least the length of the moving contact 1.

As shown in fig. 2, the first external air outlet 311 and the second air outlet 331 are both disposed at the extended end of the arc channel 7, for example, the first external air outlet 311 and the second air outlet 331 are disposed at the position from the front of the position where the movable contact 1 departs from the first contact member 21 and the second contact member 22 to the position within 60% of the moving length of the movable contact 1. Under the combined action of the 4 insulation walls 31, 32, 33 and 34 and the 2 external exhaust ports 311 and 312, the electric arc and the internal gas move along the electric arc channel 7, and the electric arc channel 7 is longer, so that the contact area between the electric arc and the air and the insulation walls can be increased, the electric arc can be cooled in the unit group to the maximum extent, the electric arc is extinguished in the unit group without being sprayed out of the unit group, the effect of no flashover is achieved, and the electric arc is prevented from damaging components around the unit group.

Meanwhile, the arrangement of the arc channel 7 also plays a certain role in gas blocking, so that gas generated when the moving contact 1 and the static contacts 2 and 2' in the unit set are disconnected and arc-started is prevented from expanding and rapidly spraying out of the insulating shell 3, the arc stays in the arc extinguish chamber 5 for a relatively long time under the action of air pressure, and arc extinction is further facilitated; and when the electric arc is completely extinguished in the arc extinguish chamber 5, the arrangement of the electric arc channel 7 can ensure that the gas expanded by heating in the unit set is sprayed out of the insulating shell 3 along the electric arc channel 7 so as to cool the high-heat gas and prevent the gas from damaging external structures or human bodies.

Referring to fig. 13 in combination with fig. 3, in order to further enhance the arc extinguishing capability of each unit set in the rotary electrical switch 100, a corresponding insulating wall may be further added inside the insulating housing 3 according to the space requirement to form an extended arc channel 7 'by enclosure, so that the extended arc channel 7' is further folded back to be disposed toward the front of the opening position of the movable contact 1.

Further, the extended arc channel 7 ' is communicated with the arc channel 7, so that a channel for accommodating an arc to pass through inside the unit set is longer, and the position of a new external exhaust port corresponding to the extended arc channel 7 ' can be set according to the shape and the position of the extended arc channel 7 ', and preferably, the new exhaust port is arranged in front of the opening position of the movable contact 1.

Referring to fig. 14 and 15, in another preferred embodiment of the present invention, the arc channel 7 is located between the insulating housing 3 and the movable contact 1 or between the insulating housing 3 and the arc-extinguishing chamber 5, and the arc channel 7 extends from the front of the movable contact 1 along a tangential direction of the movement of the movable contact 1. In this embodiment, the arc channels 7 are also provided with 2 and located on two sides of the plane a, specifically, the two arc channels 7 are respectively formed by surrounding a side wall of one side of the insulating housing 3 and a fifth insulating wall 35 located in the insulating housing 3, a side wall of the other side of the insulating housing 3 and a sixth insulating wall 36 located in the insulating housing 3, and at this time, the first external exhaust port 311 and the second exhaust port 331 are respectively communicated with the two arc channels 7.

With such an arrangement, when the movable contact 1 is separated from the fixed contacts 2 and 2 ', the generated electric arc can be directly discharged from the breaking position of the movable contact 1 and the fixed contacts 2 and 2 ' along the electric arc channel 7, or can be moved to the electric arc channel 7 to be discharged from the breaking position of the movable contact 1 and the fixed contacts 2 and 2 ' along the gap between the arc extinguish chamber 5 and the insulating housing 3 under the driving of the air flow, and at the moment, the extension size of the arc extinguishing grid sheet in the arc extinguish chamber 5 can be prolonged, so that the arc extinguishing effect of the rotary electric switch 100 is improved through the cooperation of the arc extinguish chamber 5 and the electric arc channel 7.

Further, in the present embodiment, the extended arc channel 7 ' is disposed between the arc channel 7 and the first external exhaust port 311 and the second exhaust port 331, and the extended arc channel 7 ' may be disposed in a labyrinth shape to further enhance the arc extinguishing effect of the arc channel 7 and the extended arc channel 7 '.

It should be noted that, in the embodiment of the present invention and the accompanying drawings, the arc channel 7 and the extended arc channel 7 'are only located in the front of the arc extinguish chamber 5 for illustration, in other embodiments of the present invention, the rotary electrical switch 100 can also cancel the installation of the arc extinguish chamber 5, and at this time, the arc channel 7 and the extended arc channel 7' are located in the front of the movable contact 1. The utility model provides a rotation type electrical apparatus switch 100 uses when using, uses with outside operating device 110 cooperation usually, wherein, outside operating device 110 with be located rotation type electrical apparatus switch 100 top moving contact insulating support 4 lug connection or indirect connection, with pass through moving contact insulating support 4 control is a set of or multiunit the connection and the branch of unit group are disconnected.

Referring to fig. 16, the external operating mechanism 110 includes a mouthpiece 111 provided at a bottom thereof and an operating member 112 provided at a top thereof. The shape of the interface 111 is a groove matched with the shape of the protruding structure 41, the protruding structure 41 can be connected and matched with the interface 111 of the external operating mechanism 110, when the operating element 112 is rotated, the external operating mechanism 110 operates the moving contact insulating support 4 through the non-circular protruding structure to drive the moving contact 1 to rotate, so that the moving contact 1 is in contact with or disconnected from the corresponding fixed contacts 2 and 2'. Furthermore, the rotary electrical switch 100 is installed in a power distribution cabinet, and only the operating element 112, such as a handle, a knob, etc., for operating the movable contact insulating support 4 is exposed outside the panel of the power distribution cabinet.

It should be noted that the utility model discloses in only with protruding structure 41 sets up moving contact insulating support 4 top, recessed structure 42 sets up moving contact insulating support 4's below exemplifies, in the other embodiments of the utility model, also can with recessed structure 42 sets up moving contact insulating support 4's upper end, protruding structure 41 sets up moving contact insulating support 4's lower extreme, and this moment outside operating device 110 interface 111 be with recessed structure 42 corresponds the arch that sets up. That is, the specific arrangement and combination form among the convex structure 41, the concave structure 42 and the interface 111 can be selected according to actual needs, and it is only required to ensure that the external operating mechanism 110 can simultaneously control the contact or separation of the moving contact 1 and the static contacts 2 and 2' in one or more sets of the unit sets through the interface 111 and the operating element 112, so as to realize the on-off of the main loop of the system.

The utility model discloses a rotary electric switch 100, through being provided with permanent magnet 6, explosion chamber 5 in the unit group, and set up first striking structure 212 and second striking structure 222 on static contact 2, 2 ', set up the electric arc passageway 7, extension electric arc passageway 7 ' of length more than or equal to the length of moving contact 1 movement track in the unit group simultaneously, make the electric arc that produces when moving contact 1 in the unit group separates with corresponding static contact 2, 2 ' can be more fast and more enter in explosion chamber 5; even if the voltage and the current in the system are large, when the electric arc cannot be extinguished in the arc extinguish chamber 5, the electric arc is further accelerated to be cooled along the elongation of the electric arc channel 7 or the electric arc channel 7 and the prolonged electric arc channel 7 ' by arranging the electric arc channel 7 and the prolonged electric arc channel 7 ', then the electric arc is controlled to be extinguished in the electric arc channel inside the switch or the electric arc channel 7 and the prolonged electric arc channel 7 ', the electric arc is prevented from overflowing to the outside of the switch, no flashover effect is achieved outside the switch, particularly in a place with high voltage and high current used in the system, the safety of the switch is effectively improved, even if components around the switch keep a small distance from the switch, the arc extinction and zero flashover can be realized, and the use space of the system is greatly saved.

Furthermore, the utility model discloses a rotary electrical switch 100, through setting up the multiunit unit group and range upon range of the use of assembling from top to bottom to when the control unit group is range upon range of the use, in the static contact 2, 2 ' in each unit group the first contact electrically conducts end 211 and the third contact electrically conducts end 211 ', the second contact electrically conducts end 221 and the fourth contact electrically conducts end 221 ' overlap the setting from top to bottom, make every the moving contact 1's in the unit group the assembly position is all unanimous, greatly reduced the error rate of assembly, improved rotary electrical switch 100's whole assembly efficiency; when the unit groups are stacked for use, the first contact conductive end 211 and the third contact conductive end 211 ', the second contact conductive end 221 and the fourth contact conductive end 221' in the fixed contacts 2 and 2 'in each group of the unit groups are controlled not to be overlapped, so that the distances between the first contact conductive end 211 and the third contact conductive end 211', the second contact conductive end 221 and the fourth contact conductive end 221 'in the fixed contacts 2 and 2' in two adjacent groups of the unit groups are effectively increased, and the breaking reliability and safety of the rotary electric switch 100 under the conditions of higher voltage and higher current are facilitated.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (19)

1. The utility model provides a rotation type electrical apparatus switch, by single unit group or the range upon range of constitution of a plurality of unit groups, every at least including moving contact, static contact, insulating casing and moving contact insulating support in the unit group, its characterized in that: at least one arc channel opposite to the moving direction of the moving contact is arranged in front of the moving contact, and the extension length of the arc channel is at least the moving length of the moving contact.

2. The rotary electrical switch of claim 1, wherein: the static contact comprises a first contact member and a second contact member, the first contact member comprises a first wiring terminal and a first contact conducting end corresponding to the dynamic contact, the first wiring terminal is positioned on one side of a plane A passing through the axis of the unit group, and the first contact conducting end is positioned on the other side of the plane A; the second contact member comprises a second terminal and a second contact conductive end corresponding to the movable contact; the second terminal is located on the other side of the plane A, and the second contact conductive end is located on one side of the plane A.

3. The rotary electrical switch of claim 1, wherein: the unit group is also provided with a static contact, the static contact comprises a third contact member and a fourth contact member, the third contact member is provided with a third wiring terminal and a third contact conductive end which is contacted with the movable contact, and the third wiring terminal and the third contact conductive end are arranged on the same side of a plane A passing through the axis of the unit group; the fourth contact member is provided with a fourth terminal and a fourth contact conducting terminal which is in contact with the moving contact, and the fourth terminal and the fourth contact conducting terminal are arranged on the same side of the plane A.

4. A rotary electrical switch according to claim 2 or 3, wherein: the rotary electric switch comprises at least two groups of unit sets, wherein the at least two groups of unit sets are combined up and down, and the moving contacts and the static contacts in the at least two groups of unit sets are simultaneously contacted or disconnected.

5. The rotary electrical switch of claim 1, wherein: when the cell group with the static contact and the cell group with the static contact are stacked up and down, the first contact conductive end in the static contact and the third contact conductive end in the static contact are overlapped or not overlapped, and the second contact conductive end in the static contact and the fourth contact conductive end in the static contact are overlapped or not overlapped.

6. The rotary electrical switch of claim 1, wherein: when the cell group with the fixed contact and the cell group with the fixed contact are stacked up and down, and a first contact conductive end in the fixed contact and a third contact conductive end in the fixed contact, and a second contact conductive end in the fixed contact and a fourth contact conductive end in the fixed contact at the same end of the rotary electrical switch are arranged in a non-overlapping manner, the distance between the first contact conductive end and the third contact conductive end is less than 25mm, and the distance between the second contact conductive end and the fourth contact conductive end is less than 25 mm.

7. The rotary electrical switch of claim 1, wherein: when the unit group with the static contact and the unit group with the static contact are stacked up and down, and the first contact conductive end in the static contact and the third contact conductive end in the static contact, the second contact conductive end in the static contact and the fourth contact conductive end in the static contact which are located at the same end of the rotary electrical switch can be symmetrically arranged.

8. The rotary electrical switch of claim 1, wherein: and an external exhaust port of the arc channel is positioned in front of the position where the moving contact is separated from the static contact and within 60% of the moving length of the moving contact.

9. The rotary electrical switch of claim 1, wherein: the rotary electric switch also comprises an extended arc channel, and the extended arc channel is arranged by extending the end part extended from the arc channel to the opposite direction.

10. The rotary electrical switch of claim 9, wherein: the extended arc channel is arranged in such a way that the end part extending from the arc channel is folded back to the front of the opening position of the movable contact.

11. The rotary electrical switch of claim 1, wherein: the rotary electric switch also comprises an arc extinguish chamber, wherein the arc extinguish chamber is arranged in front of the moving contact, and at least one arc channel is arranged in front of the arc extinguish chamber.

12. The rotary electrical switch of claim 11, wherein: the arc channel is positioned between the insulating shell and the moving contact or between the insulating shell and the arc extinguish chamber, and the arc channel extends from the front of the moving contact along the tangential direction of the movement of the moving contact.

13. The rotary electrical switch of claim 11, wherein: and the arc extinguishing chamber is provided with a permanent magnet.

14. The rotary electrical switch of claim 1, wherein: and the insulating shell is provided with a permanent magnet.

15. The rotary electrical switch of claim 1, wherein: and the moving contact insulating support is provided with a permanent magnet.

16. The rotary electrical switch of claim 1, wherein: permanent magnets are arranged on the static contact or/and around the static contact.

17. The rotary electrical switch of claim 1, wherein: and the movable contact is provided with a permanent magnet.

18. The rotary electrical switch of claim 11, wherein: permanent magnets are arranged around the arc extinguish chamber.

19. The rotary electrical switch of claim 11, wherein: permanent magnets are arranged on at least one or more of the arc extinguish chamber, the moving contact insulating support, the fixed contact, the periphery of the fixed contact, the moving contact and the periphery of the arc extinguish chamber.

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