CN216624082U

CN216624082U - Arc extinguishing chamber, arc extinguishing system and electric installation

Info

Publication number: CN216624082U
Application number: CN202122089514.7U
Authority: CN
Inventors: 姚伟; 王春崔; 曹大军; 周剑; 吴迪
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-05-27
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to an arc extinguish chamber, which comprises two arc isolating plates which are oppositely arranged and a plurality of arc extinguish grating pieces which are arranged between the two arc isolating plates, wherein all the arc extinguish grating pieces are radially arranged at intervals from an inlet to an outlet of the arc extinguish chamber; the arc extinguish chamber also comprises an arc inlet channel which is of an arc-shaped structure integrally, the arc inlet channel comprises a channel inlet section, a channel middle section and a channel tail section which are sequentially connected from an inlet to an outlet of the arc extinguish chamber, the channel inlet section is of a horn-shaped structure, a small opening end of the channel inlet section is connected with the channel middle section, the width of the channel middle section is constant, and the channel tail section comprises two V-shaped channels which are arranged side by side; the arc extinguishing chamber is reasonable in design of the arc inlet channel, and the speed and the uniformity of the electric arc entering the arc extinguishing chamber are improved. The utility model also relates to an arc extinguishing system comprising the arc extinguishing chamber, and the arc extinguishing system has good arc extinguishing performance. The utility model also provides a conductive device comprising the arc extinguishing system, which has good breaking capacity.

Description

Arc extinguishing chamber, arc extinguishing system and electric installation

Technical Field

The utility model relates to the field of low-voltage electrical appliances, in particular to an arc extinguishing chamber, an arc extinguishing system comprising the arc extinguishing chamber and a conductive device comprising the arc extinguishing system.

Background

A switching apparatus, such as an isolating switch, is an electrical product for closing and opening an electric circuit, and generally includes at least one conductive device and an operating mechanism drivingly connected to the conductive device to drive the conductive device to be closed or opened, where the conductive device is closed or opened by a corresponding contact or separation between a movable contact mechanism and a fixed contact inside the conductive device; in addition, an arc extinguishing chamber is often arranged in the conductive device to improve the arc extinguishing capability and the breaking performance of the conductive device. The arc inlet channel of the arc extinguish chamber of the existing switching electrical appliance is poor in pertinence, the efficiency of introducing electric arcs into the arc extinguish chamber is poor, and the electric arcs are prone to being unevenly distributed in the arc extinguish chamber.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides an arc extinguish chamber, wherein the arc inlet channel of the arc extinguish chamber is reasonable in design and is beneficial to improving the speed and uniformity of electric arc entering the arc extinguish chamber. The arc extinguishing system comprising the arc extinguishing chamber is also provided, and the arc extinguishing performance is good; also provides a conductive device comprising the arc extinguishing system, and the breaking capacity of the conductive device is good.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an arc extinguish chamber comprises two arc isolating plates which are oppositely arranged and a plurality of arc extinguish grid pieces which are arranged between the two arc isolating plates, wherein all the arc extinguish grid pieces are radially arranged at intervals from an inlet to an outlet of the arc extinguish chamber; the arc extinguishing chamber still includes the whole arc channel that advances that is the arc structure, advances the arc channel and includes channel entry section, channel interlude and the last tail section of channel that links to each other in proper order to the export direction by the entry of arc extinguishing chamber, and the channel entry section is tubaeform structure, and its osculum end links to each other with the channel interlude, and the width of channel interlude is invariable, and the tail section of channel is including two V-arrangement channels that set up side by side.

Preferably, a first separation gap is arranged between the two V-shaped channels, the width of the tail section of each channel is smaller than that of the middle section of each channel, and the center line of the tail section of each channel in the width direction is overlapped with the center line of the middle section of each channel in the width direction.

Preferably, the arc barrier is a sector plate, and is provided with a plurality of arc barrier grid sheet fixing holes for fixing arc extinguishing grid sheets; grid fixing feet are arranged at two side edges of the arc extinguishing grid in the width direction.

Preferably, the arc inlet channel is formed by arranging grid arc-striking grooves of all arc-extinguishing grids.

Preferably, the grid piece arc ignition groove includes consecutive arc ignition groove entry section, arc ignition groove interlude and the last tail section of arc ignition groove, and arc ignition groove entry section is tubaeform structure, and its osculum end links to each other with arc ignition groove interlude one end, and arc ignition groove interlude width is invariable, and the arc ignition groove interlude other end links to each other with the last tail section of arc ignition groove, and the last tail section of arc ignition groove is including two V-arrangement grooves that set up side by side.

Preferably, a separation plane is arranged between the two V-shaped grooves, a transition plane is respectively arranged between two ends of the two V-shaped grooves and two side walls of the middle section of the two arc striking grooves, and the separation plane is parallel and level to the transition plane.

The utility model provides an arc extinguishing system, its includes the explosion chamber, two explosion chambers set up relatively and form between two explosion chambers and be used for the pivot to set up moving contact mechanism's moving contact rotating space, every explosion chamber all includes explosion chamber first end and explosion chamber second end, in two explosion chambers, the explosion chamber first end of an explosion chamber is relative with the explosion chamber second end of another explosion chamber, the explosion chamber first end or the explosion chamber second end one side of two explosion chambers are used for assembling the static contact.

Preferably, the arc extinguishing system further includes permanent magnets, the permanent magnets are disposed outside the outlets of the arc extinguishing chambers, the two permanent magnets are disposed at one ends of the two arc extinguishing chambers, which are close to the static contact, respectively, or the two permanent magnets are disposed in the middle of the two arc extinguishing chambers and biased toward the arc extinguishing chambers to keep away from the ends of the corresponding static contacts.

A conductive device comprises an arc extinguishing system and a conductive device shell, wherein the conductive device shell comprises two arc extinguishing chamber installation positions and an exhaust channel which are arranged at intervals relatively, a static contact is arranged between one end of each arc extinguishing chamber and an inlet of the exhaust channel, and an outlet of the exhaust channel is communicated with the outside.

Preferably, the exhaust passage is a bent passage; the arc extinguishing system further comprises permanent magnets, the two permanent magnets are respectively arranged at one ends, close to the fixed contact, of the two arc extinguishing chambers, or the two permanent magnets are arranged in the middle of the two arc extinguishing chambers and are deviated from one ends, far away from the corresponding fixed contact, of the arc extinguishing chambers, and the permanent magnets are arranged on the outer side of an outlet of each arc extinguishing chamber.

The arc-extinguishing chamber has the advantages of reasonable design of the arc-inlet channel and strong pertinence, and is favorable for improving the efficiency and uniformity of electric arcs entering the arc-extinguishing chamber.

The arc extinguishing system comprises the arc extinguishing chamber, and has good arc extinguishing performance and high efficiency; in addition, the permanent magnet is beneficial to further improving the efficiency of the electric arc entering the arc extinguishing chamber.

The conductive device of the utility model has good breaking capacity.

Drawings

Fig. 1 is a schematic structural view of a second embodiment of the conductive device of the present invention, in which a movable contact mechanism and a fixed contact are in an open state;

fig. 2 is a schematic structural diagram of a second embodiment of the conductive device of the present invention, in which the movable contact mechanism and the fixed contact are in a closed state;

FIG. 3 is a schematic view of the structure of the arc chute of the present invention;

FIG. 4 is a schematic diagram of the structure of an arc chute of the present invention;

FIG. 5 is a schematic perspective view of a second embodiment of the conductive apparatus of the present invention;

fig. 6 is a schematic structural view of the moving contact assembly of the present invention.

Detailed Description

The following description of the embodiments of the conductive device of the present invention will be made in conjunction with the examples shown in fig. 1 to 6. The conductive device of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-2, the conductive device 2 of the present invention includes a conductive device housing 2-0, and a contact system and an arc extinguishing system disposed in the conductive device housing 2-0 and used in cooperation, wherein the contact system includes a movable contact mechanism 2-1 pivotally disposed on the conductive device housing 2-0 and a stationary contact 2-2 paired with the movable contact mechanism 2-1, and the operating mechanism 1 is drivingly connected to the movable contact mechanism 2-1 to drive the movable contact mechanism 2-1 to rotate, so as to close or open the movable contact mechanism 2-1 and the stationary contact 2-2. Furthermore, the moving contact mechanism 2-1 comprises a contact support 2-10 arranged in a pivoting manner and a moving contact component 2-11 which is inserted on the contact support 2-10 and two ends of which protrude outside the radial two ends of the contact support 2-10, and two static contacts 2-2 are arranged on two sides of the moving contact mechanism 2-1 and are respectively matched with two ends of the moving contact mechanism 2-1; the arc extinguishing system comprises two arc extinguishing chambers 2-3 which are respectively arranged at two sides of the contact system.

As shown in fig. 1-2, an embodiment of the arc extinguishing system is: the two arc extinguish chambers 2-3 are oppositely arranged, a moving contact rotating space for pivotally rotating the moving contact mechanism 2-1 is formed between the two arc extinguish chambers 2-3, each arc extinguish chamber 2-3 comprises an arc extinguish chamber first end and an arc extinguish chamber second end, the first end of one arc extinguish chamber 2-3 in the two arc extinguish chambers 2-3 is opposite to the second end of the other arc extinguish chamber 2-3, and the first end or the second end of each arc extinguish chamber 2-3 is used for assembling a fixed contact 2-2. Further, as shown in fig. 1-2, the arc extinguishing system further includes permanent magnets, the two permanent magnets are respectively disposed at one end of the two arc extinguishing chambers 2-3 close to the fixed contact 2-2, or the two permanent magnets are respectively disposed at the middle portions of the two arc extinguishing chambers 2-3 and are biased to the end of the arc extinguishing chamber 2-3 far away from the corresponding fixed contact 2-2, and each permanent magnet is located outside the outlet of the arc extinguishing chamber 2-3. Further, as shown in fig. 1-2 and 5, the conductive device casing 2-0 includes two arc-extinguishing chamber mounting positions 2-00 and two groups of permanent magnet mounting positions 2-4, which are oppositely arranged at intervals, each group of permanent magnet mounting positions 2-4 includes two permanent magnet mounting positions 2-4, the side of the arc extinguish chamber mounting position 2-00 close to the moving contact mechanism 2-1 is taken as the inner side, the side of the arc extinguish chamber mounting position 2-00 far away from the moving contact mechanism 2-1 is taken as the outer side, the two permanent magnet installation positions 2-4 of one group are respectively arranged at the outer sides of the ends, close to the static contact 2-2, of the two arc extinguish chamber installation positions 2-00, and the two permanent magnet installation positions 2-4 of the other group are respectively arranged at the outer sides of the middles of the two arc extinguish chamber installation positions 2-00 and offset towards the ends, far away from the corresponding static contact 2-2, of the arc extinguish chamber installation positions 2-00.

Specifically, as shown in fig. 1-2, each arc extinguish chamber 2-3 is integrally in a sector structure, and the two arc extinguish chambers 2-3 are connected end to form a ring structure, i.e., a first end of one arc extinguish chamber 2-3 is opposite to a second end of the other arc extinguish chamber, and a separation gap is arranged between the first end and the second end; the two static contacts 2-2 are respectively arranged in the two separation gaps and are respectively arranged close to the two arc extinguish chambers 2-3, namely one static contact 2-2 is close to one end of one arc extinguish chamber 2-3, and the other static contact 2-2 is close to one end of the other arc extinguish chamber 2-3.

As shown in fig. 1-2 and 5, the conductive device housing 2-0 further includes exhaust channels 2-01, each exhaust channel 2-01 is disposed opposite to one end of an arc-extinguishing chamber mounting location 2-00, the stationary contact 2-2 is disposed between the arc-extinguishing chamber 2-3 and the exhaust channel 2-01, and an outlet of the exhaust channel 2-01 is communicated with the outside. Further, as shown in fig. 1-2 and 5, the exhaust passage 2-01 is a curved passage, which is advantageous for increasing the cooling path of the arc gas. Specifically, the exhaust channel 2-01 is a volute channel, one end of which is an inlet and is used for being opposite to the arc extinguish chamber 2-3, and the other end of which is an outlet and is used for being communicated with the outside.

As shown in fig. 6, it is an embodiment of the movable contact assembly 2-11: the moving contact component 2-11 comprises two conducting plates 2-110 which are oppositely arranged, two magnetic conducting plates 2-111 which are respectively arranged at two sides of the two conducting plates 2-110, two spring plates 2-112 which are respectively arranged at two sides of the two magnetic conducting plates 2-111 and a hoop 2-113, each conducting plate 2-110 is provided with a conducting plate bulge 2-1100, the conducting plate bulges 2-1100 of the two conducting plates 2-110 are abutted together to ensure that a clamping gap matched with the static contact 2-2 is formed between two ends of the two conducting plates 2-110, two ends of one side of each magnetic conducting plate 2-111 facing the spring plate 2-112 are respectively provided with a magnetic conducting plate bulge 2-1110, two ends of each spring plate 2-112 are respectively in limit fit with the two magnetic conducting plate bulges 2-1110, each spring piece 2-112 is of an arch structure, a spring piece clamping groove in limit fit with the clamp 2-113 is formed in the middle of each spring piece 2-112, and the clamp 2-113 is arranged in the middle of the moving contact component 2-11 and clamps the conducting strips 2-110, the magnetic conducting strips 2-111 and the spring pieces 2-112 together. Further, as shown in fig. 6, each of the magnetic conductive pieces 2 to 111 further includes two positioning arms, and a magnetic conductive piece limiting gap for embedding the hoop 2 to 113 is provided between the two positioning arms; in the two magnetic conductive sheets 2-111, two positioning arms of one magnetic conductive sheet 2-111 are respectively arranged opposite to two positioning arms of the other magnetic conductive sheet 2-111.

As shown in fig. 3, is an embodiment of the arc chute 2-3: the arc extinguishing chamber 2-3 comprises two arc isolating plates 2-30 which are oppositely arranged at intervals and a plurality of arc extinguishing grid pieces 2-31 which are arranged between the two arc isolating plates 2-30, and all the arc extinguishing grid pieces 2-31 are arranged in a radial shape at intervals; arc extinguishing chamber 2-3 still includes the whole arc channel that advances that is arc structure, advances the arc channel and includes channel entry section, channel interlude and the terminal tail section of channel that links to each other in proper order to the export orientation by the entry of arc extinguishing chamber 2-3, and the channel entry section is tubaeform structure, and its osculum end links to each other with the channel interlude, and the width of channel interlude is invariable, and the tail section of channel is including two V-arrangement channels that set up side by side. The arc inlet channel of the arc extinguish chamber 2-3 is matched with the end shape and the swing path of the movable contact assembly 2-1, so that interference on the action of the movable contact assembly 2-1 is avoided, electric arcs can be better and more uniformly introduced into the arc extinguish chamber 2-3, and the arc extinguish efficiency and the performance of the arc extinguish chamber 2-3 are improved.

Specifically, as shown in fig. 3 and 6, the inlet section of the arc inlet channel is matched with the end parts of the two spring pieces 2 to 112, the middle section of the arc inlet channel is matched with the end parts of the two magnetic conductive pieces 2 to 111, the tail section of the arc inlet channel is matched with the end parts of the two conductive pieces 2 to 110, and the two V-shaped channels are respectively matched with the end parts of the two conductive pieces 2 to 110.

As shown in fig. 3 and in combination with fig. 4, a first separation gap is provided between the two V-shaped channels, the width of the tail section of each channel is smaller than that of the middle section of each channel, and the center line of the tail section of each channel in the width direction coincides with the center line of the middle section of each channel in the width direction.

As shown in fig. 1 to 3, the arc barrier 2 to 30 is a sector plate, which is provided with a plurality of arc barrier grid fixing holes for fixing arc-extinguishing grids 2 to 31; grid fixing feet 2-311 are arranged at two side edges of the arc extinguishing grid 2-31 in the width direction and are matched with grid fixing holes of the arc isolating plate. Furthermore, each arc-isolating plate 2-30 is provided with two rows of arc-isolating plate grid plate fixing holes, and a pair of side edges of each arc-extinguishing grid plate 2-31 are respectively provided with two grid plate fixing feet 2-311.

As shown in fig. 3 to 4, the arc inlet channel is formed by arranging grid arc-striking grooves of all arc-extinguishing grids 2 to 31. Further, as shown in fig. 4, the grid arc-striking groove comprises an arc-striking groove person inlet section 2-312, an arc-striking groove middle section 2-313 and an arc-striking groove tail section 2-314 which are connected in sequence, the arc-striking groove inlet section 2-312 is of a horn-shaped structure, a small opening end of the horn-shaped structure is connected with one end of the arc-striking groove middle section 2-313, the width of the arc-striking groove middle section 2-313 is constant, the other end of the arc-striking groove middle section 2-313 is connected with the arc-striking groove tail section 2-314, and the arc-striking groove tail section 2-314 comprises two V-shaped grooves which are arranged side by side. Further, as shown in fig. 4, a separation plane is arranged between the two V-shaped grooves, a transition plane is respectively arranged between two ends of the two V-shaped grooves and two sides of the middle section 2-313 of the two arc striking grooves, and the separation plane is flush with the transition plane.

Preferably, as shown in fig. 1-2 and 5, a transparent observation window 2-00 is further disposed on a side wall of the conductive device housing 2-0, and the transparent observation window 2-00 corresponds to a gap between one arc extinguish chamber 2-3 and one stationary contact 2-2.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the utility model, which shall be deemed to belong to the scope of the utility model.

Claims

1. An arc extinguish chamber comprises two arc isolation plates (2-30) which are oppositely arranged and a plurality of arc extinguish grid pieces (2-31) which are arranged between the two arc isolation plates (2-30), wherein all the arc extinguish grid pieces (2-31) are radially arranged at intervals from an inlet to an outlet of the arc extinguish chamber; the method is characterized in that: the arc extinguishing chamber still includes the arc channel that advances that wholly is the arc structure, advances the arc channel and includes channel entry section, channel interlude and the terminal tail section of channel that links to each other in proper order to the export orientation by the entry of arc extinguishing chamber (2-3), and the channel entry section is tubaeform structure, and its osculum end links to each other with the channel interlude, and the width of channel interlude is invariable, and the tail section of channel is including two V-arrangement channels that set up side by side.

2. Arc chute according to claim 1, characterized in that: a first separation gap is arranged between the two V-shaped channels, the width of the tail section of each channel is smaller than that of the middle section of each channel, and the center line of the tail section of each channel in the width direction coincides with the center line of the middle section of each channel in the width direction.

3. Arc chute according to claim 1, characterized in that: the arc isolation plates (2-30) are sector-shaped plates and are provided with a plurality of arc isolation plate grid sheet fixing holes for fixing arc extinguishing grid sheets (2-31); grid fixing pins (2-311) are arranged on two side edges of the arc extinguishing grid (2-31) in the width direction.

4. Arc chute according to claim 1, characterized in that: the arc inlet channel is formed by arranging grid arc striking grooves of all arc extinguishing grids (2-31).

5. The arc chute of claim 4, characterized in that: the grid arc guiding groove comprises an arc guiding groove inlet section (2-312), an arc guiding groove middle section (2-313) and an arc guiding groove tail section (2-314) which are sequentially connected, the arc guiding groove inlet section (2-312) is of a horn-shaped structure, a small opening end of the arc guiding groove inlet section is connected with one end of the arc guiding groove middle section (2-313), the width of the arc guiding groove middle section (2-313) is constant, the other end of the arc guiding groove middle section (2-313) is connected with the arc guiding groove tail section (2-314), and the arc guiding groove tail section (2-314) comprises two V-shaped grooves which are arranged side by side.

6. The arc chute of claim 5, characterized in that: a separation plane is arranged between the two V-shaped grooves, a transition plane is respectively arranged between the two ends of the two V-shaped grooves and the two side walls of the middle sections (2-313) of the two arc striking grooves, and the separation plane is parallel and level to the transition plane.

7. An arc extinguishing system, characterized in that it comprises the arc extinguishing chambers (2-3) according to any one of claims 1-6, two arc extinguishing chambers (2-3) are arranged oppositely and form a moving contact rotating space for pivotally arranging the moving contact mechanism (2-1) between the two arc extinguishing chambers (2-3), each arc extinguishing chamber (2-3) comprises an arc extinguishing chamber first end and an arc extinguishing chamber second end, of the two arc extinguishing chambers (2-3), the arc extinguishing chamber first end of one arc extinguishing chamber (2-3) is opposite to the arc extinguishing chamber second end of the other arc extinguishing chamber (2-3), and the arc extinguishing chamber first end or the arc extinguishing chamber second end side of the two arc extinguishing chambers (2-3) is used for assembling the static contact (2-2).

8. The arc extinguishing system of claim 7, wherein: the arc extinguishing system further comprises permanent magnets, wherein the permanent magnets are arranged on the outer sides of the outlets of the arc extinguishing chambers (2-3), the two permanent magnets are respectively arranged at one ends, close to the static contacts (2-2), of the two arc extinguishing chambers (2-3), or the two permanent magnets are arranged in the middle of the two arc extinguishing chambers (2-3) and are deviated to one ends, far away from the corresponding static contacts (2-2), of the arc extinguishing chambers (2-3).

9. An electric conduction device, characterized in that, it includes the arc extinguishing system of claim 7 and electric conduction device casing (2-0), and electric conduction device casing (2-0) includes two explosion chamber installation positions (2-00) and exhaust duct (2-01) that set up relatively spaced apart, and the static contact (2-2) sets up between one end of explosion chamber (2-3) and the entry of exhaust duct (2-01), and the exit of exhaust duct (2-01) communicates with the outside.

10. The electrically conductive device of claim 9, wherein: the exhaust channel (2-01) is a bent channel; the arc extinguishing system further comprises permanent magnets, the two permanent magnets are respectively arranged at one ends, close to the static contacts (2-2), of the two arc extinguishing chambers (2-3), or the two permanent magnets are arranged in the middle of the two arc extinguishing chambers (2-3) and are deviated from one ends, far away from the corresponding static contacts (2-2), of the arc extinguishing chambers (2-3), and the permanent magnets are arranged on the outer sides of outlets of the arc extinguishing chambers (2-3).