CN114649153A

CN114649153A - Switch

Info

Publication number: CN114649153A
Application number: CN202011513746.4A
Authority: CN
Inventors: 南寅; 吴来顺; 刘万里; 南添; 罗沈
Original assignee: Tianjin Svrui Intelligent Electrical Co Ltd
Current assignee: Tianjin Svrui Intelligent Electrical Co Ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2022-06-21
Also published as: WO2022134743A1

Abstract

The invention discloses a switch, which comprises an insulating shell and internal elements arranged in the insulating shell, wherein the insulating shell is provided with at least one phase pole, each phase pole is provided with at least one electric arc channel, each electric arc channel is a channel which extends from the bottom of an arc extinguish chamber to the direction of a big cover for a certain distance, turns round and extends towards the bottom for a certain distance, then turns round and extends towards the rear end for a certain distance and then reaches an outlet, or/and the electric arc channel extends from the bottom of the arc extinguish chamber to the direction of the big cover for a certain distance, then turns round and extends towards the direction of the big cover for a certain distance and then reaches the outlet. The invention utilizes the internal channel space of the switch to completely dissipate and absorb the electric arc, effectively overcomes the problems that the arc spraying port of the arc extinguishing device is directly arranged above the wire inlet end in the prior structure, the arcing distance is overlarge when high voltage and heavy current are disconnected and the interphase short circuit is easy to occur, and ensures that the switch realizes zero arcing and the safety and the reliability when the switch is disconnected are greatly improved.

Description

Switch

Technical Field

The invention relates to the field of low-voltage electric appliances, in particular to a switch.

Background

A switch is a commonly used electrical device for interrupting a current in a circuit in time when a fault such as a short circuit or an overload occurs in the circuit, thereby preventing an accident from occurring. With the development of photovoltaic technology, the rated working voltage of the plastic shell switch which is required to be used at present is increased to AC1000V (alternating current) and DC1500V (direct current), and meanwhile, the flashover distance is required to be as short as possible, even zero flashover is required, so that the switch is safe and reliable in the use process, and secondary flashover faults cannot be caused to a box body and a cabinet body; the conventional switch arc spraying port is arranged at the upper part of a switch inlet wire end, an electric arc channel inside the switch is short, when the switch breaks fault current, electric arc is generated between a moving contact and a static contact, surrounding air is ionized to form high-temperature high-pressure conductive free gas, residual gas after cooling and cutting in an arc extinguish chamber is sprayed out of the switch through the arc spraying port, one end of the static contact of the switch in the prior art is electrically connected with a wiring screw at the inlet wire end, and the wiring screw is right opposite to the position of the arc spraying port. When a circuit breaks down and breaks down fault current, electric arc can be led to a wiring screw at a wire inlet end along an arc striking sheet of an arc extinguish chamber, so that direct short circuit is caused between the wiring screw and a movable contact, breaking failure is caused, and arc gas is directly sprayed out of a switch due to high voltage; thereby causing secondary arc faults inside the box body and the cabinet body and finally causing serious quality accidents of burning the switch, the box body and the cabinet body. The existing solution measures are that an arc extinguishing cover is generally added on the outer side of the switch, so that the length and wiring difficulty of the switch are inevitably increased, and the application range of the switch is limited.

Disclosure of Invention

Based on the above background, the invention provides a switch, which rearranges an arc channel inside the switch and an air outlet of the arc channel, lengthens the length of the internal arc channel, and further absorbs and dissipates the arc inside the switch, thereby realizing zero arcing and greatly improving the safety and reliability of the switch when breaking fault current.

The above object of the present invention can be achieved by the following technical solutions:

the invention provides a switch, which comprises an insulating shell and an internal element arranged in the insulating shell, wherein the insulating shell is provided with at least one phase pole, each phase pole is provided with at least one arc channel, and the arc channels are channels which are ejected forwards from an arc extinguish chamber through at least one turn or/and ejected backwards from the arc extinguish chamber through at least one turn. Each phase pole of the switch is provided with a single-breakpoint moving contact, a fixed contact corresponding to the single-breakpoint moving contact and an arc extinguish chamber, each arc channel is partially arranged in a chamber with the arc extinguish chamber, and the internal elements at least comprise an operating mechanism, an overload protection system, a wire inlet end, a wire outlet end and a rotating shaft. When external force is applied to the operating mechanism, the moving contact and the fixed contact can be combined and separated through mechanism transmission, so that the circuit is normally connected or disconnected. When the circuit is abnormal such as short circuit or overload, the overload protection system unlocks the operating mechanism, so that the movable contact and the static contact are quickly separated, the generated electric arc is quickly elongated, the electric arc enters the arc extinguish chamber, the electric arc is cut into a plurality of sections of short arcs by the arc extinguish grid sheet and is cooled, the electric arc voltage is quickly increased, the electric arc is gradually extinguished after the electric arc voltage is greater than the power supply voltage, so that the purpose of extinguishing the electric arc is achieved, high-temperature gas generated in the arc process flows to an outlet along an electric arc channel in the insulating shell, the high-temperature gas is further cooled in the electric arc channel, the temperature is greatly reduced when the high-temperature gas flows to the outlet, the condition of re-ignition of the electric arc is not met, and the purpose of zero arcing is achieved.

Preferably, the electric arc passageway is from the explosion chamber bottom to cover the direction greatly and turn round after extending a distance to the bottom direction again and extend a distance to export or/and turn round after extending a distance to the rear end direction after extending a distance to the arc passageway from the explosion chamber bottom to cover the direction greatly and turn round again after extending a distance to the bottom direction and extend a distance to the passageway of export after extending a distance to the bottom direction.

Preferably, the arc channel turns at an angle of 10-180 degrees.

Preferably, the arc channel is provided with or without deionization means.

Preferably, the deionization device is made of a metal material or a non-metal material, and a plurality of vent holes are formed in the deionization device.

Preferably, each phase pole is at least provided with a moving contact with double breakpoints and a static contact corresponding to the moving contact with double breakpoints.

Preferably, the double-breakpoint movable contact is arranged in front of the rotating shaft in a left-right U-shaped twinning manner.

Preferably, the double-breakpoint moving contact is arranged in a bridge type rotary mode and penetrates through the rotating shaft in the front-back direction.

Preferably, the bottom of the left and right U-shaped twin moving contacts is connected with a metal rod, and the metal rod is directly or indirectly arranged on the rotating shaft.

Preferably, the left and right U-shaped twinned moving contacts are correspondingly provided with a left and right fixed contact, and the left and right fixed contacts are respectively in conductive connection with the incoming line terminal or/and the outgoing line terminal.

Preferably, the left and right U-shaped twin moving contacts are detachably and electrically connected with the left and right fixed contacts under the driving of the rotating shaft, so that the serial connection and disconnection of the conductive systems in the same phase pole are realized.

Preferably, the front bridge type moving contact and the rear bridge type moving contact are arranged in the clamping grooves of the rotating shaft through shafts and springs.

Preferably, the front and rear bridge-type moving contacts are correspondingly provided with a front and rear fixed contact, and the front and rear fixed contacts are respectively in conductive connection with the wire inlet end and the wire outlet end.

Preferably, the front and rear bridge-type moving contacts are detachably and electrically connected with the front and rear fixed contacts under the driving of the rotating shaft, so that the serial connection and disconnection of the conductive systems in the same phase pole are realized.

Preferably, the overload protection device is of a mechanical structure type or/and an electronic type.

Preferably, when the overload protection device is in a mechanical structure, the overload protection device at least comprises a short circuit magnetic release or/and an overload thermal release.

Preferably, different phases can be provided with the same arc path or different arc paths.

Preferably, the arc channel is correspondingly set to be a moving contact with a single breakpoint or a rotary double breakpoint or a U-shaped double breakpoint, or any combination of the three moving contacts at each phase pole.

The invention has the following beneficial effects:

1. the invention carries out rearrangement on the arc channel inside the switch and the arc spraying port of the arc channel, lengthens the length of the inner arc channel, and leads the arc to be further absorbed and dissipated inside the switch, thereby realizing zero arcing and greatly improving the safety and the reliability of the switch when breaking the fault current.

2. The invention realizes zero arcing by utilizing the internal space of the switch without additionally increasing an arc extinguishing cover, saves the installation space of the switch, is more convenient to wire, and improves the applicability and the safety of the switch.

3. The invention adopts a double-contact series structure in the same phase pole, and the series double-contact can provide higher arc voltage when breaking the fault current, accelerate arc extinguishing and improve the reliability of breaking the high-voltage fault current.

4. The invention can adopt a plurality of arc channels in the same phase pole at the same time, and shunt high-temperature and high-pressure gas generated when high-voltage and large-current are disconnected by a plurality of channels, so that the gas is completely absorbed and dissipated in the arc channels, thereby realizing zero arcing and greatly improving the safety and reliability of the switch when high-voltage fault current is disconnected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of the path of the arc path 10 in a switch of the present invention.

Fig. 2 is an exploded view of a switch according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a main circuit of a left-right U-shaped double-generation moving contact of a switch according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a left and right U-shaped double-generation moving contact of a switch according to a first embodiment of the present invention.

Fig. 5 is an internal cross-sectional view of the space left of the moving contact 20-L and the stationary contact 30-L of a phase of the switch according to the first embodiment of the present invention.

Fig. 6 is an internal cross-sectional view of the space in which the movable contact 20-R and the stationary contact 30-R are located on the right side of one phase of the switch according to the first embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a base 91 of a switch according to a first embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a base 92 of a switch according to a first embodiment of the present invention.

Fig. 9 is a schematic structural view of a large lid 93 of a switch according to a first embodiment of the present invention.

Fig. 10 is a schematic structural view of a switch-removable large cover 93 according to a first embodiment of the present invention.

Fig. 11 is a schematic internal cross-sectional view of a phase pole in which a front-rear bridge type rotating double-breakpoint structure of a switch according to a fourth embodiment of the present invention is located.

Fig. 12 is a schematic diagram of a front-rear bridge type rotating double-breakpoint structure of a switch according to a fourth embodiment of the present invention.

Fig. 13 is a schematic internal cross-sectional view of a phase pole in which a front-rear bridge-type rotating double-breakpoint structure of a switch according to a fifth embodiment of the present invention is located.

Fig. 14 is a schematic internal cross-sectional view of a phase pole in which a front-rear bridge type rotating double-breakpoint structure of a switch according to a sixth embodiment of the present invention is located.

Fig. 15 is an exploded view of a single-break structure of a switch according to a seventh embodiment of the present invention.

Fig. 16 is an internal cross-sectional view of one phase pole of a switch according to a seventh embodiment of the present invention.

Fig. 17 is an internal cross-sectional view of one phase pole of a switch of an eighth embodiment of the present invention.

Fig. 18 is an internal cross-sectional view of one phase pole of a switch of the ninth embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "upper", "lower", "left", "right", "front", "rear" and the like in the present invention are used with reference to the positions shown in the drawings.

First embodiment

Referring to fig. 2, a switch according to a first embodiment of the present invention includes an arc channel 10, a movable contact 20, a stationary contact 30, an arc extinguish chamber 40, an operating mechanism 50, an overload protection system 60, a wire inlet end 70, a wire outlet end 80, a rotating shaft 203, and an insulating housing 90, wherein the arc channel 10, the movable contact 20, the stationary contact 30, the arc extinguish chamber 40, the operating mechanism 50, the overload protection system 60, and the rotating shaft 203 are all disposed in the insulating housing 90. Specifically, the insulating housing 90 includes a base 91, a base 92 and a large cover 93, the base 92 is disposed between the base 91 and the large cover 93, and the base 91, the base 92 and the large cover 93 are fixed by screws, the switch of the embodiment adopts a 2P form, that is, includes A, B two phase poles, and in a specific practical application, the switch can also adopt a 1P, 3P or 3P + N form for adjustment, which is not limited herein.

Referring to fig. 3-4, the insulating housing 90 includes two phase poles, the movable contact 20 in each phase pole is a movable contact with double break points, and includes a left movable contact 20-L and a right movable contact 20-R, the fixed contact 20 is a fixed contact disposed corresponding to the movable contact with double break points, and includes a left fixed contact 30-L and a right fixed contact 30-R, the left movable contact 20-L and the right movable contact 20-R are respectively welded at the left end and the right end of a U-shaped conductive bar 201, the left movable contact 20-L and the right movable contact 20-R are electrically connected in series through the U-shaped conductive bar 201, the U-shaped conductive bar 201 is directly disposed in the rotating shaft 203 through a metal rod 202, the left fixed contact 30-L is welded at one end of the conductive bar 301, the other end of the conductive bar 301 is electrically connected with a conductive bar 302 leading to the direction of the wire outlet 80, the left static contact 30-L, the conductive bar 301 and the conductive bar 302 are fixed together in the cavity 921 of the base 92 by screws, so as to realize the conductive connection between the left static contact 30-L and the outlet terminal 80. The right static contact 30-R is welded at one end of the conductive bar 303, the other end of the conductive bar 303 extends to the wire inlet end 70, and the right static contact 30-R and the conductive bar 303 are fixed together in the cavity 922 of the base 92 through screws, so that the conductive connection between the right static contact 30-R and the wire inlet end 70 is realized. In this embodiment, the switch includes A, B two phase poles, the A, B two phase poles include the same contact structure, that is, A, B two phases include two left and right U-shaped twinning moving contact structures, the two left and right U-shaped twinning moving contacts are installed in front of the rotating shaft 203 through two identical metal rods 202, the rotating shaft 203 can drive the left and right U-shaped twinning moving contacts to rotate, and further, the two left and right fixed contacts 30-L and 30-R can be electrically connected in a detachable manner, so that the serial connection and disconnection of the conductive systems in the same phase pole are realized.

Referring to fig. 5, fig. 5 is a cross-sectional view of a space where the moving contact 20-L and the static contact 30-L are located on the left side in a phase electrode of the switch, the arc extinguish chamber 40 is disposed in front of the moving contact 20-L and the static contact 30-L, the arc channel 10 is a channel that extends from the bottom of the arc extinguish chamber 40 to the direction of the large cover 93 for a distance, turns around 180 degrees, extends for a distance to the bottom direction, turns around 90 degrees, extends for a distance to the rear direction, and reaches an outlet, the arc channel 10 is partially located in a chamber together with the arc extinguish chamber 40, the arc channel 10 is internally provided with a deionization device 41, and the deionization device 41 is a metal plate and is provided with a plurality of through holes. In other preferred embodiments, the turning angle in the arc channel 10 may be 10 to 180 degrees, and the deionization unit 41 may not be disposed in the arc channel 10 or the deionization unit 41 may be made of a non-metal material.

Referring to fig. 6, fig. 6 is a cross-sectional view of a space where the moving contact 20-R and the static contact 30-R are located on the right side in one phase of the switch, the arc extinguish chamber 40 is also disposed in front of the moving contact 20-R and the static contact 30-R, the arc channel 10 is a channel that extends from the bottom of the arc extinguish chamber 40 to the direction of the large cover 93 for a distance, turns 180 degrees, extends to the direction of the large cover 93 for a distance, and then reaches an outlet, the arc channel 10 is partially in a chamber with the arc extinguish chamber 40, the arc channel 10 is internally provided with a deionization device 41, the deionization device 41 is a metal plate, and is provided with a plurality of through holes. In other preferred embodiments, the turning angle in the arc channel 10 may be 10 to 180 degrees, and the deionization unit 41 may not be disposed in the arc channel 10 or the deionization unit 41 may be made of a non-metal material.

Referring to fig. 7-9, the base 91 includes two cavities 911, and the cavities 911 extend rearward along the base 91 to the outlet 80. The base 92 includes two cavities 921, two cavities 922 and 1 cavity 923, and the two

cavities

921, 922 are respectively located in A, B two phase poles. The large cover 93 includes two cavities 931, two cavities 932 and a cavity 933, the two

cavities

931, 932 are located in the two phase poles A, B, and the two

cavities

921, 922 of the base 92 are correspondingly arranged. The cavity 931 of the large cover 93, the cavity 921 of the base 92 and the cavity 911 of the base 91 are enclosed together to form the arc path 10 shown in fig. 5, and the cavity 932 of the large cover 93 and the cavity 922 of the base 92 are enclosed together to form the arc path 10 shown in fig. 6.

Referring to fig. 10, the operating mechanism 50 is fixed in the accommodating cavity 923 of the base 92 by a screw and is linked with the rotating shaft 203 by a connecting rod, the operating mechanism 50 includes an operating handle 501, the operating handle 501 is disposed above the large cover 93, the operating mechanism 50 can be driven to operate by toggling the operating handle 501, and then the operating mechanism 50 drives the rotating shaft 203 to operate, so that the moving contact 20 and the static contact 30 can be opened and closed. When the moving contact 20 and the static contact 30 are closed, the switch is closed, and the main loop is electrified; when the moving contact 20 is disconnected from the fixed contact 30, the switch is opened, and the main circuit is powered off. The overload protection system 60 is a mechanical structure, and includes a short-circuit magnetic release 601 and an overload thermal release 602, in this embodiment, the number of the short-circuit magnetic release 601 and the overload thermal release 602 is 2, and the short-circuit magnetic release 601 and the overload thermal release 602 are respectively disposed in the A, B two phase poles, one end of the short-circuit magnetic release 601 and one end of the overload thermal release 602 are respectively fixed in the accommodating cavity 923 of the base 92 through screws, and are used in cooperation with the corresponding movable contact 20, when a large current such as overload, short circuit and the like occurs in a circuit, the short-circuit magnetic release 601 and the overload thermal release 602 can drive the operating mechanism 50 to trip, and the operating mechanism 50 drives the movable contact 20 to disconnect from the stationary contact 30, thereby ensuring electrical safety. In other preferred embodiments, the overload protection system 60 can be of electronic or/and mechanical construction.

In this embodiment, the contact structures of the A, B two phase poles and the arc channels correspondingly arranged are completely the same, that is, each phase pole includes two arc-extinguishing chambers 40, the two arc-extinguishing chambers 40 are respectively and correspondingly arranged in the arc channel 10 shown in fig. 5 and a partial channel of the arc channel 10 shown in fig. 6, the arc-extinguishing chambers 40 are located at positions close to the moving contact 20 and the fixed contact 30, an arc generated when the moving contact 20 and the fixed contact 30 are disconnected enters the arc-extinguishing chambers 40 quickly, and is cut and cooled in the arc-extinguishing chambers 40, the arc voltage increases quickly, and when the arc voltage is greater than the power voltage, the arc is extinguished gradually, so as to achieve the purpose of extinguishing the arc. High-temperature gas generated in the arc burning process in the arc extinguishing chamber 40 is further cooled in the arc channel 10 shown in fig. 5 and the arc channel 10 shown in fig. 6 respectively, and then is discharged from the switch, the temperature of the gas flowing out after passing through the arc channel 10 is greatly reduced, and the condition of re-burning of the electric arc is not provided any more, so that the purpose of zero arcing is achieved.

Second embodiment

In a switch according to the first embodiment, the left and right U-shaped twinned moving contacts of the same phase pole are respectively and correspondingly provided with two arc channels with different outlets, such as the front and rear arc channels shown in fig. 5 and 6, respectively, and unlike the first embodiment, in a switch according to the second embodiment of the present invention, the left and right U-shaped twinned moving contacts of the same phase pole are respectively and correspondingly provided with two identical arc channels shown in fig. 5.

Third embodiment

The difference between the second embodiment and the third embodiment is that the left and right U-shaped twinned moving contacts of the same phase pole are provided with two identical arc channels as shown in fig. 5, and the left and right U-shaped twinned moving contacts of the same phase pole are correspondingly provided with two identical arc channels as shown in fig. 6.

The first to third embodiments described above have explained three different combinations of the left and right U-shaped twinned moving contact structures in which the arc paths are correspondingly provided in the same phase pole of the switch. In other preferred embodiments, the switch may comprise a plurality of different phases, which may be provided with the same arc path or different arc paths.

Fourth embodiment

Referring to fig. 11 to 12, a switch according to a fourth embodiment of the present invention includes an arc channel 10, a movable contact 20, a stationary contact 30, an arc extinguish chamber 40, an operating mechanism 50, an overload protection system 60, a wire inlet end 70, a wire outlet end 80, and an insulating housing 90, wherein the arc channel 10, the movable contact 20, the stationary contact 30, the arc extinguish chamber 40, the operating mechanism 50, and the overload protection system 60 are all disposed in the insulating housing 90. Different from the first embodiment, each phase pole of the switch of this embodiment is provided with a moving contact 20 with double breaking points and a fixed contact 30 corresponding to the moving contact 20 with double breaking points, the moving contact 20 with double breaking points is a front and back bridge type rotating moving contact, namely, the device comprises a front moving contact 20-F and a rear moving contact 20-B, the front moving contact 20-F and the rear moving contact 20-B are arranged in front and rear through the rotating shaft 203, the front and rear bridge-type rotary moving contacts 20 are correspondingly provided with a front and a rear fixed contacts 30-F and 30-B through a shaft and a spring arranged in a clamping groove of the rotating shaft 203, the front and the back moving contacts 20-F and 20-B can rotate under the driving of the rotating shaft 203, and the two fixed contacts 30-F and 30-B can be electrically connected with each other in a separable way, so that the serial connection and disconnection of the conductive systems in the same phase pole are realized. The front and rear two moving contacts 20-F and 20-B are correspondingly provided with a front arc extinguishing chamber 40 and a rear arc extinguishing chamber 40, the front and rear arc extinguishing chambers 40 are correspondingly provided with two arc channels 10, the arc channel 10 corresponding to the front arc extinguishing chamber 40 extends from the bottom of the arc extinguishing chamber 40 to the direction of the big cover 93 for a certain distance, then turns around for 180 degrees and extends to the direction of the bottom for a certain distance, then turns around for 180 degrees and extends to the direction of the big cover 93 for a certain distance, and then the arc channel 10 corresponding to the rear arc extinguishing chamber 40 extends from the bottom of the arc extinguishing chamber 40 to the direction of the base 91 for a certain distance, then turns around for 90 degrees and extends to the front end for a certain distance, and then the arc channel 10 is partially in a chamber together with the arc extinguishing chambers 40. The process from generation to complete extinction of the arc in this embodiment is similar to the principle described in the first embodiment, and is not described herein again. In other preferred embodiments, the turning angle in the arc channel 10 can be 10-180 degrees.

Fifth embodiment

Referring to fig. 13, a switch according to a fifth embodiment of the present invention includes an arc path 10, a movable contact 20, a stationary contact 30, an arc extinguish chamber 40, an operating mechanism 50, an overload protection system 60, a wire inlet end 70, a wire outlet end 80, and an insulating housing 90, wherein the arc path 10, the movable contact 20, the stationary contact 30, the arc extinguish chamber 40, the operating mechanism 50, and the overload protection system 60 are all disposed in the insulating housing 90. Different from the fourth embodiment is, this embodiment two front and back arc-extinguishing chambers 40 correspond and are provided with two arc passageway 10, the place ahead arc passageway 10 that arc-extinguishing chamber 40 corresponds is followed arc-extinguishing chamber 40 bottom to turn round 180 degrees after extending a distance to big lid 93 direction and turn round 180 degrees after extending a distance to the bottom direction and turn round after extending a distance to big lid 93 direction and reach the export after extending a distance, the back arc passageway 10 that arc-extinguishing chamber 40 corresponds is followed arc-extinguishing chamber 40 bottom to turn round 180 degrees after extending a distance to base 91 direction and turn round 180 degrees after extending a distance to base 92 direction and turn round 180 degrees after extending a distance to base 91 direction and extend one section to the export. The process from generation to complete extinction of the arc in this embodiment is similar to the principle described in the first embodiment, and is not described herein again. In other preferred embodiments, the turning angle in the arc channel 10 can be 10-180 degrees.

Sixth embodiment

Referring to fig. 14, a switch according to a sixth embodiment of the present invention includes an arc channel 10, a movable contact 20, a stationary contact 30, an arc extinguish chamber 40, an operating mechanism 50, an overload protection system 60, a wire inlet end 70, a wire outlet end 80, and an insulating housing 90, wherein the arc channel 10, the movable contact 20, the stationary contact 30, the arc extinguish chamber 40, the operating mechanism 50, and the overload protection system 60 are all disposed in the insulating housing 90. Different from the fourth and fifth embodiments, the arc channel 10 corresponding to the arc extinguish chamber 40 in the rear of the present embodiment includes two paths to the outlet, one path extends from the bottom of the arc extinguish chamber 40 to the base 91 for a distance, then turns around 180 degrees and extends to the base 92 for a distance, then turns around 180 degrees and extends to the base 91 for a distance, and the other path extends from the bottom of the arc extinguish chamber 40 to the base 91 for a distance, then turns around 90 degrees and extends to the front end for a distance, and then extends to the outlet. The process from generation to complete extinction of the arc in this embodiment is similar to the principle described in the first embodiment, and is not described herein again. In other preferred embodiments, the turning angle in the arc channel 10 can be 10-180 degrees.

The above fourth to sixth embodiments illustrate three different combinations of the front and rear bridge-type moving contact structures in which arc channels are correspondingly provided in the same phase of the switch. In other preferred embodiments, the switch may comprise a plurality of different phases, which may be provided with the same arc path or different arc paths.

Seventh embodiment

Referring to fig. 15 to 16, a switch according to a seventh embodiment of the present invention includes an arc channel 10, a movable contact 20, a stationary contact 30, an arc extinguish chamber 40, an operating mechanism 50, an overload protection system 60, a wire inlet end 70, a wire outlet end 80, and an insulating housing 90, wherein the arc channel 10, the movable contact 20, the stationary contact 30, the arc extinguish chamber 40, the operating mechanism 50, and the overload protection system 60 are all disposed in the insulating housing 90. Different from the first embodiment, each phase pole of the switch of this embodiment is only provided with a single-breakpoint movable contact and a fixed contact corresponding to the single-breakpoint movable contact, that is, the switch includes a movable contact 20 and a fixed contact 30, the arc extinguish chamber 40 is disposed in front of the movable contact 20 and the fixed contact 30, the arc channel 10 extends from the bottom of the arc extinguish chamber 40 to the direction of the large cover 93 for a distance, turns around 180 degrees, extends towards the bottom for a distance, turns around 90 degrees, extends towards the rear end for a distance, and then reaches the outlet, and the arc channel 10 is partially in a chamber with the arc extinguish chamber 40. The process from generation to complete extinction of the arc in this embodiment is similar to the principle described in the first embodiment, and is not described herein again. In other preferred embodiments, the turning angle in the arc channel 10 can be 10-180 degrees.

Eighth embodiment

Referring to fig. 17, a switch according to an eighth embodiment of the present invention is different from the seventh embodiment in that the arc channel 10 of the switch of the present embodiment extends from the bottom of the arc extinguish chamber 40 to the direction of the large lid 93 for a distance, turns around 180 degrees, extends to the bottom for a distance, turns around 180 degrees, extends to the direction of the large lid 93 for a distance, and then reaches the outlet. In other preferred embodiments, the turning angle in the arc channel 10 can be 10-180 degrees.

Ninth embodiment

Referring to fig. 18, a switch according to a ninth embodiment of the present invention is different from the seventh and eighth embodiments in that the arc path 10 of the switch of the present embodiment includes two paths to the outlet, one of the two paths extends from the bottom of the arc extinguish chamber 40 to the large lid 93, extends from the bottom of the arc extinguish chamber 180 degrees to the bottom, then turns 180 degrees to the bottom, extends from the bottom to the rear end by 90 degrees, and then extends to the outlet, and the other path extends from the bottom of the arc extinguish chamber 40 to the large lid 93 by 180 degrees to the bottom, then turns 180 degrees to the bottom, extends from the bottom to the large lid 93 by 180 degrees, extends to the large lid 93 by a distance, and then extends to the outlet. In other preferred embodiments, the turning angle in the arc channel 10 can be 10-180 degrees.

The seventh to ninth embodiments above have explained that the single-break point movable contact structure can be provided with three different arc paths in one phase of the switch. In other preferred embodiments, the switch may comprise a plurality of different phases, which may be provided with the same arc path or different arc paths.

The above is merely a preferred embodiment of the present invention, and those skilled in the art can make various changes or modifications to the embodiment of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a switch, its characterized in that includes insulating casing and locates interior component in the insulating casing, insulating casing is provided with an at least looks utmost point, and each looks utmost point sets up an at least electric arc passageway, electric arc passageway is for following the explosion chamber through at least one turn to the squirt ahead or/and follow the explosion chamber through at least one turn to rear squirt passageway.

2. The switch of claim 1, wherein the arc channel is a channel extending from the bottom of the arc extinguish chamber to the top cover for a distance, then turning to the bottom for a distance, then turning to the back end for a distance, and then leading to the outlet, or/and the arc channel extending from the bottom of the arc extinguish chamber to the top cover for a distance, then turning to the bottom for a distance, then turning to the top cover for a distance, and leading to the outlet.

3. A switch according to claim 1 or 2, characterized in that the arc channel turns between 10 and 180 degrees.

4. The switch of claim 1, wherein said internal components further comprise at least one of an operating mechanism, an overload protection device, a line inlet terminal, a line outlet terminal, and a shaft.

5. A switch according to claim 1, wherein each phase pole is provided with a single break point movable contact and a stationary contact corresponding to the single break point movable contact.

6. A switch according to claim 1, wherein each phase pole is provided with at least a moving contact with a double break point and a stationary contact corresponding to the moving contact with a double break point.

7. The switch of claim 6, wherein the double break movable contact is a left-right U-shaped double contact and is disposed in front of the rotating shaft.

8. The switch of claim 6, wherein the double break movable contact is a bridge rotary type disposed back and forth through the rotating shaft.

9. A switch according to claim 1, characterized in that at least one quenching chamber is provided per phase pole.

10. A switch according to claims 1 and 9, characterized in that each of said arc channels is partly in a chamber with said arc extinguishing chamber.

11. A switch according to claim 10, wherein the arc path is provided with or without deionisation means.

12. The switch of claim 11, wherein the deionization unit is a metallic or non-metallic material having a plurality of vent holes formed therein.

13. The switch of claim 4, wherein the overload protection device is of a mechanical structure type or/and an electronic type.

14. The switch of claim 13, wherein the overload protection device, when in a mechanical configuration, comprises at least one of a short circuit magnetic trip and an overload thermal trip.

15. The switch of claim 7, wherein a metal rod is connected to the bottom of the left and right U-shaped double-acting movable contacts, and the metal rod is directly or indirectly disposed on the rotating shaft.

16. The switch of claim 7, wherein the left and right U-shaped twinned moving contacts are correspondingly provided with left and right stationary contacts, and the left and right stationary contacts are respectively electrically connected to the incoming line terminal or/and the outgoing line terminal.

17. The switch of any one of claims 15 to 16, wherein the left and right U-shaped twinned moving contacts are electrically connected to the left and right stationary contacts in a separable manner under the driving of the rotating shaft, so as to achieve series connection and disconnection of the conductive systems in the same phase pole.

18. The switch of claim 8, wherein the front and rear bridge moving contacts are disposed in the engaging groove of the rotating shaft via a shaft and a spring.

19. The switch of claim 8, wherein the front and rear bridge-type moving contacts are correspondingly provided with a front and rear fixed contacts, and the front and rear fixed contacts are respectively electrically connected to the incoming line terminal and the outgoing line terminal.

20. The switch of any one of claims 18 to 19, wherein said front and rear bridge moving contacts are electrically and detachably connected to said front and rear stationary contacts by said rotating shaft, so as to connect and disconnect the conductive systems in the same phase in series.

21. A switch according to claim 1, characterized in that different phases can be provided with the same arc path or different arc paths.

22. A switch according to any of claims 1-21, wherein said arc path is provided as a single break point or a double break point of rotation or a double break point of U-shape, or any combination of the three moving contacts in each phase.