Contact arc extinguishing system and circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses a contact arc extinguishing system and a circuit breaker. The contact arc extinguishing system comprises an arc extinguishing seat, a first arc extinguishing chamber, an exhaust plate and a baffle plate. The first arc extinguishing chamber is mounted on the arc extinguishing seat; the exhaust plate is arranged on the arc extinguishing seat, is opposite to the first arc extinguishing chamber and is used for exhausting gas in the first arc extinguishing chamber; the baffle and the exhaust plate are arranged in parallel at intervals and are integrally formed. According to the contact arc extinguishing system, the exhaust plate and the baffle plate are arranged into an integrated structure, so that the baffle plate can be effectively prevented from shifting, the dustproof effect of the baffle plate is improved, and the working reliability of the arc extinguishing system is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a contact arc extinguishing system and a circuit breaker. Background Technique

[0002] The arc extinguishing system is one of the important components of a circuit breaker. The arc extinguishing system generally includes an arc extinguishing seat and an arc extinguishing chamber arranged on the arc extinguishing seat. An exhaust plate is generally arranged on the arc extinguishing seat opposite to the rear of the arc extinguishing chamber, and the ionized gas in the arc extinguishing chamber is discharged through the exhaust holes on the exhaust plate. Since the exhaust plate of the circuit breaker is generally exposed, in order to prevent external dust from entering the arc extinguishing chamber through the exhaust holes on the exhaust plate, a baffle is generally arranged outside the exhaust plate to block the dust, and the baffle is arranged at an interval from the exhaust plate to ensure the normal exhaust of the exhaust plate.

[0003] However, the traditional baffle is generally made of cardboard and is separately arranged from the exhaust plate. If the airflow discharged from the exhaust plate is large, it is easy to cause the baffle to shift, affecting the dust-proof effect of the baffle.

[0004] Therefore, it is urgent to propose a contact arc extinguishing system and a circuit breaker to solve the above technical problems. Content of the Utility Model

[0005] According to one aspect of the utility model, the utility model provides a contact arc extinguishing system, in which the exhaust plate and the baffle are arranged as an integral structure, which can effectively prevent the baffle from shifting, improve the dust-proof effect of the baffle, and further improve the reliability of the arc extinguishing system.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The contact arc extinguishing system includes:

[0008] An arc extinguishing seat;

[0009] A first arc extinguishing chamber, installed on the arc extinguishing seat;

[0010] An exhaust plate, arranged on the arc extinguishing seat, the exhaust plate is arranged opposite to the first arc extinguishing chamber, and is used for discharging the gas in the first arc extinguishing chamber;

[0011] A baffle, arranged parallel and at an interval from the exhaust plate, and the baffle is integrally formed with the exhaust plate.

[0012] Optionally, the bottom of the exhaust plate and the bottom of the baffle are connected by a connecting plate, and a fracture notch is arranged on the connecting plate, and the fracture notch extends from one end of the connecting plate to the other end along the length direction of the connecting plate.

[0013] Optionally, the contact arc extinguishing system further includes:

[0014] The static contact includes a static contact conductor, the static contact conductor includes a first support portion and a second support portion which are arranged at intervals, a static contact point is arranged on the second support portion, and the arc extinguishing seat is installed on the first support portion;

[0015] The second arc extinguishing chamber includes two arc extinguishing side plates, an arc extinguishing grid and a magnetic conduction plate. The arc extinguishing grid and the magnetic conduction plate are both connected between the two arc extinguishing side plates. The magnetic conduction plate is arranged close to the second support portion and is riveted to the second support portion.

[0016] Optionally, three limiting blocks are arranged on the plate surface of the magnetic conduction plate facing the second support portion. The three limiting blocks enclose a limiting space. The end portion of the second support portion is installed in the limiting space, and the three limiting blocks are respectively abutted against three successively connected side walls of the end portion of the second support portion.

[0017] According to another aspect of the present utility model, the present utility model provides a circuit breaker, which includes a housing and the contact and arc extinguishing system described in any one of the above technical solutions, and the contact and arc extinguishing system is arranged in the housing.

[0018] Optionally, the circuit breaker further includes a backup protection tripping mechanism arranged in the housing. The backup protection tripping mechanism includes a bracket, a pin arranged on the bracket, a torsion spring sleeved on the pin, and an armature arranged at one end of the bracket close to the pin; on the side wall of the bracket, a limiting clamping arm is arranged at one end close to the pin. One end of the torsion spring abuts against the limiting clamping arm, and the other end abuts against the armature; or,

[0019] The backup protection tripping mechanism includes a bracket, a pin arranged on the bracket, an armature movably arranged on the pin, and a tension spring. A limiting stop arm is arranged on the bracket. The limiting stop arm abuts against the side wall of the armature. A plurality of bayonets are arranged on the top of the armature. One end of the tension spring is connected to the bracket, and the other end is selectively clamped in one of the bayonets.

[0020] Optionally, the circuit breaker further includes a static contact arranged in the housing, a wiring board at the outgoing line end, a flux tripping device and an electronic component board system. The electronic component board system includes:

[0021] An integrated circuit board, including a control module, a temperature measurement module, a protection module, a metering module, a power supply power taking module and a battery power taking module;

[0022] The incoming line terminal temperature measuring board is arranged on one side of the integrated circuit board and close to the static contact. The incoming line terminal temperature measuring board is electrically connected to the temperature measuring module. The incoming line terminal temperature measuring board is provided with incoming line temperature measuring resistors corresponding to the static contacts one by one, and a power taking part. The power taking part is electrically connected to both the static contact and the power supply power taking module;

[0023] The outgoing line terminal temperature measuring board is arranged on the other side of the integrated circuit board and close to the wiring board. The outgoing line terminal temperature measuring board is electrically connected to the temperature measuring module. The outgoing line terminal temperature measuring board is provided with outgoing line temperature measuring resistors corresponding to the wiring board one by one;

[0024] The protection battery module is arranged on one side of the integrated circuit board. The protection battery module is electrically connected to the battery power taking module and is used to supply power to the integrated circuit board;

[0025] The magnetic flux circuit board is arranged on one side of the integrated circuit board and is used to control the magnetic flux release. The magnetic flux circuit board is electrically connected to the control module.

[0026] Optionally, the housing is provided with a first battery accommodating groove and a second battery accommodating groove. The protection battery module is installed in the first battery accommodating groove or the second battery accommodating groove. The protection battery module is used to supply power to the circuit breaker when the external power supply is cut off.

[0027] Optionally, the structures of the first battery accommodating groove and the second battery accommodating groove are different; and / or, the sizes of the first battery accommodating groove and the second battery accommodating groove are different.

[0028] Optionally, in the first battery accommodating groove, a first fixed limiting rib and a first elastic limiting rib are respectively arranged at opposite ends in the length direction of the first battery accommodating groove. Opposite ends in the length direction of the protection battery module respectively abut against the first fixed limiting rib and the first elastic limiting rib; and / or,

[0029] In the second battery accommodating groove, a second fixed limiting rib and a second elastic limiting rib are respectively arranged at opposite ends in the length direction of the second battery accommodating groove. Opposite ends in the length direction of the protection battery module respectively abut against the second fixed limiting rib and the second elastic limiting rib.

[0030] Optionally, the first battery accommodating groove and / or the second battery accommodating groove is provided with an installation guiding rib. The installation guiding rib is provided with a guiding inclined surface. The protection battery module is provided with a guiding part. The guiding part is attached to the guiding inclined surface to limit the installation angle of the protection battery module.

[0031] Optionally, a lead wire groove is further provided on the housing. The lead wire groove is used for installing a conducting wire electrically connected to the protected battery module. A first wiring port communicating the lead wire groove with the inside of the first battery accommodating groove is provided on the side wall of the first battery accommodating groove, and a second wiring port communicating the lead wire groove with the inside of the second battery accommodating groove is provided on the side wall of the second battery accommodating groove. The conducting wire is threaded through the first wiring port or the second wiring port.

[0032] Optionally, the housing includes a middle cover and an upper cover covering the middle cover. The first battery accommodating groove and the second battery accommodating groove are provided on the middle cover. A plurality of battery pressing ribs are provided on the inner top wall of the upper cover. The plurality of battery pressing ribs are arranged opposite to the first battery accommodating groove and the second battery accommodating groove. The battery pressing ribs are used for pressing the protected battery module in the first battery accommodating groove or the second battery accommodating groove.

[0033] Optionally, the circuit breaker further includes an operating mechanism and a magnetic flux release arranged in the housing. The magnetic flux release includes:

[0034] A first cover housing;

[0035] A release arranged in the first cover housing;

[0036] A status indicating microswitch and an alarm microswitch, both arranged in the first cover housing;

[0037] A first push rod rotatably connected to the first cover housing. One end of the rotation center of the first push rod is a first trigger end, and the other end is a first driving end. The rotating shaft of the operating mechanism can push the first driving end to rotate, so that the first trigger end triggers the trigger button of the status indicating microswitch.

[0038] A second push rod slidably connected to the first cover housing. The second push rod includes a second trigger end placed in the first cover housing and a second driving end extending outside the first cover housing. A trigger portion is provided on the second trigger end. The rotating shaft of the operating mechanism can push the second driving end to move, so that the trigger portion triggers the trigger button of the alarm microswitch.

[0039] Optionally, the magnetic flux release further includes a magnetic flux circuit board for controlling the release. An elastic buckle is provided on the top of the first cover housing. The magnetic flux circuit board is installed at the top opening of the first cover housing and is snap-connected to the elastic buckle.

[0040] Optionally, the circuit breaker further includes a current transformer arranged in the housing. The current transformer includes:

[0041] A second housing, in which three independent coil cavities are provided, and protection pins and measurement pins are provided on the side wall of the second housing close to each coil cavity;

[0042] Coils, one coil is provided in each coil cavity, the coil is electrically connected to both the protection pin and the measurement pin, and the coil cavity is filled with potting compound;

[0043] An integrated circuit board is arranged on the top of the second housing. The integrated circuit board includes a protection module and a measurement module. A protection plug is provided on the protection module, and a measurement plug is provided on the measurement module. The measurement plug is inserted into the measurement pin, and the protection plug is inserted into the protection pin.

[0044] Advantages of the present utility model:

[0045] The present utility model provides a contact arc extinguishing system, which includes an arc extinguishing seat, a first arc extinguishing chamber, an exhaust plate and a baffle. By arranging the baffle parallel and spaced apart from the exhaust plate, the baffle can not only block external dust from entering the arc extinguishing chamber through the exhaust plate, but also ensure the reliability of the exhaust of the exhaust plate through the gap between the baffle and the exhaust plate. Moreover, by arranging the baffle and the exhaust plate to be integrally formed, even if the air flow pressure passing through the exhaust plate is too large, the baffle will not be displaced, improving the reliability of the installation position of the baffle, and further improving the dust prevention effect.

[0046] The present utility model also provides a circuit breaker, which includes a housing and the above-mentioned contact arc extinguishing system. Since the circuit breaker adopts the above-mentioned contact arc extinguishing system, it has a better dust prevention effect and higher working reliability. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0048] Figure 1 is a schematic structural diagram of the contact arc extinguishing system provided by the embodiment of the present utility model;

[0049] Figure 2 is an exploded schematic diagram of the contact arc extinguishing system provided by the embodiment of the present utility model;

[0050] Figure 3 is a schematic structural diagram of the arc extinguishing seat provided by the embodiment of the present utility model;

[0051] Figure 4 isFigure 3 Enlarged view at A;

[0052] Figure 5 It is an assembly drawing of the static contact and the second arc extinguishing chamber provided by the embodiment of the present utility model;

[0053] Figure 6 It is a schematic structural diagram of the circuit breaker provided by the embodiment of the present utility model;

[0054] Figure 7 It is a schematic internal structure diagram of the circuit breaker provided by the embodiment of the present utility model;

[0055] Figure 8 It is a schematic structural diagram of the backup protection tripping mechanism provided by the embodiment of the present utility model;

[0056] Figure 9 It is an exploded view of the magnetic flux release provided by the embodiment of the present utility model Figure 1 ;

[0057] Figure 10 It is an exploded view of the magnetic flux release provided by the embodiment of the present utility model Figure 2 ;

[0058] Figure 11 It is an exploded view of the magnetic flux release provided by the embodiment of the present utility model Figure 3 ;

[0059] Figure 12 It is Figure 7 Enlarged view at B;

[0060] Figure 13 It is an exploded view of the current transformer provided by the embodiment of the present utility model;

[0061] Figure 14 It is a schematic structural diagram of the electronic component board system provided by the embodiment of the present utility model;

[0062] Figure 15 It is a partial schematic diagram of the middle cover provided by the embodiment of the present utility model;

[0063] Figure 16 It is an assembly drawing of the middle cover and the protection battery module provided by the embodiment of the present utility model;

[0064] Figure 17 It is Figure 16 Enlarged view at C;

[0065] Figure 18 It is a partial view of the cross-section of the assembly drawing of the middle cover, the upper cover and the protection battery module provided by the embodiment of the present utility model.

[0066] In the figure:

[0067] 100, Contact arc extinguishing system; 110, Arc extinguishing seat; 120, First arc extinguishing chamber; 130, Exhaust plate; 140, Baffle; 150, Connection plate; 151, Fracture notch; 160, Stationary contact; 161, Stationary contact conductor; 1611, First support part; 1612, Second support part; 162, Stationary contact point; 170, Second arc extinguishing chamber; 171, Arc extinguishing side plate; 172, Arc extinguishing grid; 173, Magnetic conductive plate; 1731, Limit block;

[0068] 200, Housing; 201, Middle cover; 202, Upper cover; 2021, Battery pressing rib; 210, First battery accommodating groove; 211, First fixed limit rib; 212, First elastic limit rib; 213, First wiring port; 220, Second battery accommodating groove; 221, Second fixed limit rib; 222, Second elastic limit rib; 223, Installation guiding rib; 2231, Guiding inclined surface; 224, Second wiring port; 230, Lead wire groove;

[0069] 300, Measuring switch;

[0070] 400, Backup protection tripping mechanism; 410, Bracket; 411, Limit clamping arm; 412, Through hole; 413, Anti-rotation arm; 420, Axle pin; 430, Torsion spring; 440, Armature; 450, Magnetic yoke;

[0071] 500, Flexible connection conductor;

[0072] 600, Wiring board;

[0073] 700, Current transformer; 710, Second housing; 711, Protection pin; 712, Measurement pin; 720, Coil;

[0074] 800, Operating mechanism; 810, Rotating shaft;

[0075] 900, Flux release; 910, First housing; 911, Elastic buckle; 920, Release; 930, Status indicating microswitch; 940, Alarm microswitch; 950, First push rod; 951, First contact end; 952, First driving end; 960, Second push rod; 961, Second trigger end; 962, Second driving end; 970, First elastic member; 980, Second elastic member; 990, Flux circuit board;

[0076] 1000, Electronic component board system; 1100, Integrated circuit board; 1200, Inlet temperature measuring board; 1210, Inlet temperature measuring resistor; 1220, Power taking part; 1300, Outlet temperature measuring board; 1310, Outlet temperature measuring resistor; 1400, Protection battery module; 1410, Guiding part. Detailed implementation method

[0077] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0078] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0079] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0080] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0081] Embodiment 1

[0082] This embodiment provides a contact arc extinguishing system. The exhaust plate and the baffle are set as an integrated structure, which can effectively prevent the baffle from shifting, improve the dust-proof effect of the baffle, and further improve the reliability of the arc extinguishing system during operation.

[0083] Specifically, as Figures 1 - 4As shown, the contact arc extinguishing system 100 includes an arc extinguishing seat 110, a first arc extinguishing chamber 120, an exhaust plate 130, and a baffle 140. Among them, the first arc extinguishing chamber 120 is installed on the arc extinguishing seat 110. The exhaust plate 130 is arranged on the arc extinguishing seat 110, and the exhaust plate 130 is disposed opposite to the first arc extinguishing chamber 120 for exhausting the gas in the first arc extinguishing chamber 120. The baffle 140 is arranged in parallel and at intervals with the exhaust plate 130, and the baffle 140 is integrally formed with the exhaust plate 130.

[0084] Generally, exhaust holes are provided on the exhaust plate 130, and the gas in the arc extinguishing chamber is discharged from the arc extinguishing chamber through the exhaust holes on the exhaust plate 130. The gas passing through the exhaust plate 130 is blocked by the baffle 140 and will be discharged through the gap between the baffle 140 and the exhaust plate 130. That is, the baffle 140 and the exhaust plate 130 are arranged at intervals, so that the baffle 140 does not hinder the normal exhaust of the exhaust plate 130, and the baffle 140 can block external dust, preventing external dust from entering the arc extinguishing chamber through the exhaust plate 130, and improving the working reliability of the contact arc extinguishing system 100.

[0085] Optionally, the arc extinguishing seat 110, the exhaust plate 130, and the baffle 140 can be integrally formed by injection molding, with reliable structure and convenient processing.

[0086] Furthermore, continue to refer to Figure 4 , the bottom of the exhaust plate 130 and the bottom of the baffle 140 are connected by a connecting plate 150, and a fracture notch 151 is provided on the connecting plate 150. The fracture notch 151 extends from one end of the connecting plate 150 to the other end along the length direction of the connecting plate 150. When there is too much gas in the arc extinguishing chamber, the gap between the baffle 140 and the exhaust plate 130 is difficult to meet the exhaust requirement. Under the impact of gas pressure, due to the setting of the fracture notch 151, the deformation amount of the baffle 140 will increase, making the exhaust gap between the baffle 140 and the exhaust plate 130 larger to meet the requirement of a large amount of exhaust. Even when the gas pressure is too high, the fracture notch 151 will break, separating the baffle 140 from the exhaust plate 130. At this time, the baffle 140 does not block the exhaust of the exhaust plate 130, ensuring the timely and effective discharge of gas and reducing the risk of circuit breaker damage.

[0087] Furthermore, as Figure 1 , Figure 2 and Figure 5As shown in the figure, the above-mentioned contact arc extinguishing system 100 further includes a static contact 160 and a second arc extinguishing chamber 170. Among them, the static contact 160 includes a static contact conductor 161. The static contact conductor 161 includes a first support portion 1611 and a second support portion 1612 that are arranged at intervals. A static contact point 162 is provided on the second support portion 1612, and the arc extinguishing seat 110 is installed on the first support portion 1611. The second arc extinguishing chamber 170 includes two arc extinguishing side plates 171, as well as arc extinguishing grid plates 172 and a magnetic conduction plate 173. The arc extinguishing grid plates 172 and the magnetic conduction plate 173 are both connected between the two arc extinguishing side plates 171. The magnetic conduction plate 173 is arranged close to the second support portion 1612 and is riveted to the second support portion 1612. By connecting the magnetic conduction plate 173 to the arc extinguishing side plate 171 and realizing the connection between the second arc extinguishing chamber 170 and the second support portion 1612 through the riveting of the magnetic conduction plate 173 and the second support portion 1612, compared with the prior art in which the second arc extinguishing chamber and the magnetic conduction plate are respectively connected to the second support portion, the connection structure is simplified.

[0088] In this embodiment, the second arc extinguishing chamber 170 is arranged between the first support portion 1611 and the second support portion 1612.

[0089] Further, continue to refer to Figure 5 , three limiting blocks 1731 are provided on the plate surface of the magnetic conduction plate 173 facing the second support portion 1612. The three limiting blocks 1731 enclose a limiting space, and the end of the second support portion 1612 is installed in the limiting space. The three limiting blocks 1731 are respectively abutted against three sequentially connected side walls of the end of the second support portion 1612. With such a setting, the magnetic conduction plate 173 can be limited by the second support portion 1612, avoiding the rotation of the magnetic conduction plate 173 and improving the installation stability of the magnetic conduction plate 173.

[0090] It should be noted that avoidance openings are provided on both the first support portion 1611 and the arc extinguishing seat 110 so that the moving contact can contact the static contact point 162 through the avoidance openings.

[0091] Embodiment Two

[0092] This embodiment provides a circuit breaker with good dust prevention effect and high working reliability. In a possible embodiment, the circuit breaker is a circuit breaker with a metering switch 300.

[0093] Specifically, as Figure 6 and Figure 7 shown, the circuit breaker includes a housing 200 and the contact arc extinguishing system 100 of Embodiment One, and the contact arc extinguishing system 100 is arranged inside the housing 200.

[0094] Since the circuit breaker adopts the above-mentioned contact arc extinguishing system 100, it has a better dust prevention effect and high working reliability.

[0095] Further, as shown in Figure 7 and Figure 8 , the circuit breaker further includes a backup protection tripping mechanism 400 disposed within the housing 200. In a possible embodiment, the backup protection tripping mechanism 400 includes a bracket 410, a pin 420 disposed on the bracket 410, a torsion spring 430 sleeved on the pin 420, and an armature 440 disposed at one end of the bracket 410 close to the pin 420. On the side wall of the bracket 410, a limiting clamping arm 411 is provided at one end close to the pin 420. One end of the torsion spring 430 abuts against the limiting clamping arm 411, and the other end abuts against the armature 440. In the prior art, a yoke 450 is provided at the end of the bracket 410 away from the pin 420, and one end of the torsion spring 430 abuts against the yoke 450. By providing the limiting clamping arm 411 in this embodiment, such that one end of the torsion spring 430 abuts against the limiting clamping arm 411, the length of the end portion of the torsion spring 430 can be effectively shortened.

[0096] Continuing to refer to Figure 7 and Figure 8 , a through hole 412 is provided in the middle of the bracket 410. The circuit breaker further includes a wiring board 600 at the outgoing line end and a current transformer 700. One end of the flexible connection conductor 500 is electrically connected to the wiring board 600, and the other end passes through the current transformer 700 and the through hole 412. With such a setting, conductor integration can be achieved. Compared with the segmented conductors in the prior art, the structure is simplified and the energy loss is reduced.

[0097] Moreover, the provision of the limiting clamping arm 411 on the bracket 410 can also avoid interference between the end portion of the torsion spring 430 and the flexible connection conductor 500.

[0098] Optionally, a plurality of limiting clamping arms 411 can be provided at intervals along the height direction of the bracket 410, and one end of the torsion spring 430 can selectively abut against one of the limiting clamping arms 411. With such a setting, the elastic force of the torsion spring 430 can be adjusted by adjusting the limiting clamping arm 411 cooperating with the torsion spring 430.

[0099] Further, continuing to refer to Figure 8 , the armature 440 is movably disposed on the bracket 410 through the pin 420. An anti-rotation arm 413 extends upward from the end of the bracket 410 close to the armature 440. The anti-rotation arm 413 and the other end of the torsion spring 430 respectively abut against opposite sides of the armature 440 to prevent the armature 440 from rotating.

[0100] In another possible embodiment, the backup protection tripping mechanism 400 includes a bracket 410, a pin 420 disposed on the bracket 410, an armature 440 movably disposed on the pin 420, and a tension spring. A limit stop arm is provided on the bracket 410, and the limit stop arm abuts against the side wall of the armature 440. A plurality of bayonets are provided at the top of the armature 440. One end of the tension spring is connected to the bracket 410, and the other end is selectively latched in one of the bayonets. By providing the limit stop arm, the rotation of the armature 440 can be restricted to a certain extent. By providing a plurality of bayonets, the elasticity of the tension spring can be adjusted by connecting different bayonets.

[0101] Optionally, a plurality of limit stop arms may be provided, and the plurality of limit stop arms may be symmetrically arranged along the axis of the bracket 410.

[0102] In this embodiment, two limit stop arms are provided, and the two limit stop arms are symmetrically arranged along the axis of the bracket 410.

[0103] Furthermore, as Figures 9 - 11 shown, the circuit breaker further includes an operating mechanism 800 and a flux tripping device 900 disposed in the housing 200, and the rotating shaft 810 of the operating mechanism 800 cooperates with the flux tripping device 900.

[0104] Specifically, the flux tripping device 900 includes a first housing 910, a tripping device 920, a status indication microswitch 930, an alarm microswitch 940, a first push rod 950, and a second push rod 960. Among them, the tripping device 920 is disposed in the first housing 910. The status indication microswitch 930 and the alarm microswitch 940 are both disposed in the first housing 910. The first push rod 950 is rotatably connected to the first housing 910. One end of the rotation center of the first push rod 950 is a first trigger end, and the other end is a first driving end 952. The rotating shaft 810 of the operating mechanism 800 can push the first driving end 952 to rotate, so that the first trigger end triggers the trigger button of the status indication microswitch 930. The second push rod 960 is slidably connected to the first housing 910. The second push rod 960 includes a second trigger end 961 disposed in the first housing 910 and a second driving end 962 extending out of the first housing 910. A trigger portion is provided on the second trigger end 961. The rotating shaft 810 of the operating mechanism 800 can push the second driving end 962 to move, so that the trigger portion triggers the trigger button of the alarm microswitch 940.

[0105] Among them, the status indication microswitch 930 is used to indicate the working state of the circuit breaker, such as opening and closing. The alarm microswitch 940 is used to output an alarm signal.

[0106] The flux tripping device 900 provided in this embodiment integrates the status indication function and the alarm function, can reduce the occupied space of accessories, and improves the structural compactness of the circuit breaker.

[0107] In this embodiment, when the circuit breaker is in the open state, the rotating shaft 810 of the operating mechanism 800 cooperates with the first push rod 950 and the second push rod 960, so that the first trigger end of the first push rod 950 triggers the status indication micro switch 930, and the second trigger end 961 of the second push rod 960 triggers the alarm micro switch 940.

[0108] Further, continue to refer to Figure 9 and Figure 11 The flux release 900 further includes a first elastic member 970 and a second elastic member 980. Among them, the first elastic member 970 is arranged at the rotating connection of the first housing 910 and the first push rod 950, and is used to drive the first push rod 950 to reset, that is, when the rotating shaft 810 does not apply an external force to the first push rod 950, the first push rod 950 maintains its initial position under the elastic force of the first elastic member 970, and at this time the status indication micro switch 930 is not triggered. The second elastic member 980 is arranged between the second push rod 960 and the first housing 910, and is used to drive the second push rod 960 to reset, that is, when the rotating shaft 810 does not apply an external force to the second push rod 960, the second push rod 960 maintains its initial position under the elastic force of the second elastic member 980, and at this time the alarm micro switch 940 is not triggered.

[0109] Further, as Figures 9 - 12 shown, the flux release 900 further includes a flux circuit board 990 for controlling the release 920. The top of the first housing 910 is provided with an elastic buckle 911, and the flux circuit board 990 is installed at the top opening of the first housing 910 and is snap-connected to the elastic buckle 911. Fixing the flux circuit board 990 through the elastic buckle 911 improves the convenience of installing the flux circuit board 990. Moreover, the flux circuit board 990 is equivalent to the top cover of the first housing 910, so that the flux release 900 does not need to be provided with an additional top cover, which simplifies the structure of the flux release 900.

[0110] Further, as Figure 7 and Figure 13As shown in the figure, the above circuit breaker further includes a current transformer 700, which is arranged inside the housing 200. Specifically, the current transformer 700 includes a second housing 710, a coil 720, and an integrated circuit board 1100. Among them, three independent coil cavities are provided inside the second housing 710, and protection pins 711 and measurement pins 712 are provided on the side walls of the second housing 710 close to each coil cavity. One coil 720 is provided in each coil cavity, and the coil 720 is electrically connected to both the protection pin 711 and the measurement pin 712, and the coil cavity is filled with potting compound. The integrated circuit board 1100 is arranged on the top of the second housing 710. The integrated circuit board 1100 includes a protection module and a measurement module. A protection plug is provided on the protection module, and a measurement plug is provided on the measurement module. The measurement plug is inserted into the measurement pin 712, and the protection plug is inserted into the protection pin 711. By filling the coil cavity with potting compound, phase-to-phase insulation can be ensured, and the three-phase mutual inductor coils 720 can be integrated together, which is convenient for assembly. By directly inserting the protection pin 711 and the measurement pin 712 into the protection plug and the measurement plug on the integrated circuit board 1100 respectively, the assembly structure is simplified, and the structural compactness of the circuit breaker is improved.

[0111] Furthermore, as Figure 7 and Figure 14 shown, the above circuit breaker further includes an electronic component board system 1000 arranged inside the housing 200. Specifically, the electronic component board system 1000 includes an integrated circuit board 1100, an incoming line temperature measurement board 1200, an outgoing line temperature measurement board 1300, a protection battery module 1400, and a magnetic flux circuit board 990.

[0112] Among them, the integrated circuit board 1100 includes a control module, a temperature measurement module, a protection module, a metering module, a power supply power taking module, and a battery power taking module. The incoming line end temperature measurement board 1200 is arranged on one side of the integrated circuit board 1100 and close to the static contact 160. The incoming line end temperature measurement board 1200 is electrically connected to the temperature measurement module. The incoming line end temperature measurement board 1200 is provided with incoming line temperature measurement resistors 1210 corresponding one-to-one to the static contact 160, and a power taking part 1220. The power taking part 1220 is electrically connected to both the static contact 160 and the power supply power taking module to achieve the purpose of the integrated circuit board 1100 taking power from the power supply. The outgoing line end temperature measurement board 1300 is arranged on the other side of the integrated circuit board 1100 and close to the wiring board 600. The outgoing line end temperature measurement board 1300 is electrically connected to the temperature measurement module. The outgoing line end temperature measurement board 1300 is provided with outgoing line temperature measurement resistors 1310 corresponding one-to-one to the wiring board 600. The protection battery module 1400 is arranged on one side of the integrated circuit board 1100. The protection battery module 1400 is electrically connected to the battery power taking module and is used to supply power to the integrated circuit board 1100. The magnetic flux circuit board 990 is arranged on one side of the integrated circuit board 1100 and is used to control the magnetic flux release 900. The magnetic flux circuit board 990 is electrically connected to the control module. For the electronic component board system 1000, by arranging the incoming line end temperature measurement board 1200 and the outgoing line end temperature measurement board 1300, accurate temperature measurement of the product's incoming and outgoing line ends can be achieved. By arranging the integrated circuit board 1100 to include a control module, a temperature measurement module, a protection module, a metering module, a power supply power taking module, and a battery power taking module, compared with setting a circuit board for each module, the number of circuit boards is reduced. And by arranging the incoming line end temperature measurement board 1200, the outgoing line end temperature measurement board 1300, the protection battery module 1400, and the magnetic flux circuit board 990 on both sides of the integrated circuit board 1100, the structure of the connection lines can be simplified and the space layout can be made more reasonable.

[0113] By arranging the protection battery module 1400, when the external power supply is cut off, the protection battery module 1400 can supply power to the circuit breaker, so that the circuit breaker can still work normally.

[0114] Optionally, in this embodiment, the integrated circuit board 1100 is arranged in the second housing 710 of the current transformer 700.

[0115] Optionally, in this embodiment, in order to save space, the outgoing line end temperature measurement board 1300 is arranged vertically, and the incoming line end temperature measurement board 1200 is arranged horizontally.

[0116] Further, as Figure 15 and Figure 16As shown in the figure, a first battery accommodation groove 210 and a second battery accommodation groove 220 are provided on the housing 200. A protection battery module 1400 is installed in the first battery accommodation groove 210 or the second battery accommodation groove 220. The protection battery module 1400 is used to supply power to the circuit breaker when the external power supply is cut off. By providing the first battery accommodation groove 210 and the second battery accommodation groove 220, protection battery modules 1400 of different models can be fixed, meeting the user's usage requirements for different protection battery modules 1400 and improving the universality of the circuit breaker.

[0117] Optionally, since there may be differences in the structure and size of different protection battery modules 1400, in a possible embodiment, the structures of the first battery accommodation groove 210 and the second battery accommodation groove 220 are different. In another possible embodiment, the sizes of the first battery accommodation groove 210 and the second battery accommodation groove 220 are different. In other possible embodiments, both the structures and sizes of the first battery accommodation groove 210 and the second battery accommodation groove 220 are different.

[0118] Optionally, in this embodiment, the first battery accommodation groove 210 and the second battery accommodation groove 220 are arranged along the width direction of the housing 200. Of course, in other embodiments, the first battery accommodation groove 210 and the second battery accommodation groove 220 may also be arranged along the length direction of the housing 200, which can be set according to actual needs and is not specifically limited in this application. Arranging the first battery accommodation groove 210 and the second battery accommodation groove 220 together facilitates the selective installation of the protection battery module 1400.

[0119] Further, continue to refer to Figure 15 , in the first battery accommodation groove 210, a first fixed limiting rib 211 and a first elastic limiting rib 212 are respectively provided at opposite ends in the length direction of the first battery accommodation groove 210. Opposite ends in the length direction of the protection battery module 1400 respectively abut against the first fixed limiting rib 211 and the first elastic limiting rib 212.

[0120] Specifically, the steps for installing the protection battery module 1400 are as follows:

[0121] First, abut one end of the protection battery module 1400 against the first fixed limiting rib 211;

[0122] Then, press down the other end of the protection battery module 1400. At this time, the first elastic limiting rib 212 will elastically deform under the pressure of the protection battery module 1400, increasing the distance between the first elastic limiting rib 212 and the first fixed limiting rib 211, so that the other end of the protection battery module 1400 can enter the first battery accommodation groove 210 under the action of an external force, completing the installation of the protection battery module 1400.

[0123] Finally, remove the external force applied to the protected battery module 1400. At this time, the first elastic limiting rib 212 will press the protected battery module 1400 against the first fixed limiting rib 211 under the action of the elastic restoring force.

[0124] By providing the first fixed limiting rib 211 and the first elastic limiting rib 212, the reliability of the installation of the protected battery module 1400 can be improved.

[0125] Optionally, the manner in which the second battery accommodation groove 220 fixes the protected battery module 1400 may be the same as that of the first battery accommodation groove 210. Specifically, continue to refer to Figure 15 , in the second battery accommodation groove 220, a second fixed limiting rib 221 and a second elastic limiting rib 222 are respectively provided at opposite ends in the length direction of the second battery accommodation groove 220, and opposite ends in the length direction of the protected battery module 1400 are respectively abutted against the second fixed limiting rib 221 and the second elastic limiting rib 222.

[0126] Furthermore, as shown in Figure 15 and Figure 17 , an installation guiding rib 223 is provided in the first battery accommodation groove 210 and / or the second battery accommodation groove 220. A guiding inclined surface 2231 is provided on the installation guiding rib 223, and a guiding portion 1410 is provided on the protected battery module 1400. The guiding portion 1410 is attached to the guiding inclined surface 2231 to limit the installation angle of the protected battery module 1400. Through the cooperation of the installation guiding rib 223 and the guiding portion 1410, it can be ensured that the protected battery module 1400 is installed in the first battery accommodation groove 210 or the second battery accommodation groove 220 at a specific angle to meet the installation requirements of other subsequent components and save space as much as possible.

[0127] Optionally, in this embodiment, the guiding portion 1410 on the protected battery module 1400 is a handle provided on the protected battery module 1400, and the handle is used to carry the protected battery module 1400.

[0128] Optionally, in this embodiment, the installation guiding rib 223 is provided in the second battery accommodation groove 220 and is close to the second elastic limiting rib 222.

[0129] Furthermore, continue to refer to Figure 15, a lead wire groove 230 is further provided on the housing 200. The lead wire groove 230 is used to install and protect the wire electrically connected to the battery module 1400. A first wiring port 213 communicating the lead wire groove 230 and the inside of the first battery accommodation groove 210 is provided on the side wall of the first battery accommodation groove 210, and a second wiring port 224 communicating the lead wire groove 230 and the inside of the second battery accommodation groove 220 is provided on the side wall of the second battery accommodation groove 220. The wire is passed through the first wiring port 213 or the second wiring port 224. By providing the cooperation of the lead wire groove 230 with the first wiring port 213 and the second wiring port 224, the arrangement of the wire can be made more regular, which not only improves the structural compactness of the circuit breaker, but also can protect the wire.

[0130] Further, as Figure 18 shown, the housing 200 includes a middle cover 201 and an upper cover 202 covering the middle cover 201. The first battery accommodation groove 210 and the second battery accommodation groove 220 are provided on the middle cover 201. A plurality of battery pressing ribs 2021 are provided on the inner top wall of the upper cover 202. The plurality of battery pressing ribs 2021 are arranged opposite to the first battery accommodation groove 210 and the second battery accommodation groove 220. The battery pressing ribs 2021 are used to press the protected battery module 1400 into the first battery accommodation groove 210 or the second battery accommodation groove 220. By providing the battery pressing ribs 2021, the installation of the protected battery module 1400 can be limited, the reliability of the installation of the protected battery module 1400 is improved, and the risk of the separation of the protected battery module 1400 from the wire caused by the shaking of the protected battery module 1400 inside the circuit breaker is reduced, thereby improving the reliability of the operation of the circuit breaker.

[0131] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Contact arc extinguishing system, characterized in that, Comprising: An arc extinguishing seat (110); A first arc extinguishing chamber (120), installed on the arc extinguishing seat (110); An exhaust plate (130), arranged on the arc extinguishing seat (110), the exhaust plate (130) being arranged opposite to the first arc extinguishing chamber (120) and used for discharging the gas in the first arc extinguishing chamber (120); A baffle plate (140), arranged in parallel and at intervals with the exhaust plate (130), the baffle plate (140) being integrally formed with the exhaust plate (130).

2. The contact arc extinguishing system according to claim 1, wherein The bottom of the exhaust plate (130) and the bottom of the baffle plate (140) are connected by a connecting plate (150), and a fracture notch (151) is arranged on the connecting plate (150), and the fracture notch (151) extends from one end of the connecting plate (150) to the other end along the length direction of the connecting plate (150).

3. The contact arc extinguishing system according to claim 1, characterized in that, The contact arc extinguishing system (100) further comprises: A static contact (160), including a static contact conductor (161), the static contact conductor (161) including a first support portion (1611) and a second support portion (1612) arranged at intervals, a static contact point (162) being arranged on the second support portion (1612), and the arc extinguishing seat (110) being installed on the first support portion (1611); A second arc extinguishing chamber (170), including two arc extinguishing side plates (171), as well as an arc extinguishing grid sheet (172) and a magnetic conduction plate (173), the arc extinguishing grid sheet (172) and the magnetic conduction plate (173) being both connected between the two arc extinguishing side plates (171), the magnetic conduction plate (173) being arranged close to the second support portion (1612) and riveted to the second support portion (1612).

4. The contact arc extinguishing system according to claim 3, characterized in that, Three limiting blocks (1731) are arranged on the plate surface of the magnetic conduction plate (173) facing the second support portion (1612), the three limiting blocks (1731) enclose a limiting space, the end of the second support portion (1612) is installed in the limiting space, and the three limiting blocks (1731) are respectively abutted against three successively connected side walls of the end of the second support portion (1612).

5. Circuit breaker, characterized in that, Comprising a housing (200) and the contact arc extinguishing system (100) according to any one of claims 1-4, the contact arc extinguishing system (100) being arranged inside the housing (200).

6. The circuit breaker according to claim 5, characterized in that, The circuit breaker further comprises a backup protection tripping mechanism (400) arranged inside the housing (200), the backup protection tripping mechanism (400) including a bracket (410), a pin (420) arranged on the bracket (410), a torsion spring (430) sleeved on the pin (420), and an armature (440) arranged at one end of the bracket (410) close to the pin (420); on the side wall of the bracket (410), a limiting clamping arm (411) is arranged at one end close to the pin (420), one end of the torsion spring (430) abuts against the limiting clamping arm (411), and the other end abuts against the armature (440); or, The backup protection tripping mechanism (400) includes a bracket (410), a pin (420) disposed on the bracket (410), an armature (440) movably disposed on the pin (420), and a tension spring. A limiting stop arm is provided on the bracket (410), and the limiting stop arm abuts against the side wall of the armature (440). A plurality of bayonets are provided at the top of the armature (440), and one end of the tension spring is connected to the bracket (410), and the other end is selectively clamped in one of the bayonets.

7. The circuit breaker according to claim 5, characterized in that, The circuit breaker further includes a stationary contact (160) disposed in the housing (200), a wiring board (600) at the outgoing line end, a flux tripping device (900), and an electronic component board system (1000). The electronic component board system (1000) includes: An integrated circuit board (1100), including a control module, a temperature measurement module, a protection module, a metering module, a power supply power taking module, and a battery power taking module; An incoming line end temperature measurement board (1200) disposed on one side of the integrated circuit board (1100) and close to the stationary contact (160). The incoming line end temperature measurement board (1200) is electrically connected to the temperature measurement module. An incoming line temperature measurement resistor (1210) corresponding to the stationary contact (160) one by one, and a power taking part (1220) are provided on the incoming line end temperature measurement board (1200). The power taking part (1220) is electrically connected to both the stationary contact (160) and the power supply power taking module; An outgoing line end temperature measurement board (1300) disposed on the other side of the integrated circuit board (1100) and close to the wiring board (600). The outgoing line end temperature measurement board (1300) is electrically connected to the temperature measurement module. An outgoing line temperature measurement resistor (1310) corresponding to the wiring board (600) one by one is provided on the outgoing line end temperature measurement board (1300); A protection battery module (1400) disposed on one side of the integrated circuit board (1100). The protection battery module (1400) is electrically connected to the battery power taking module and is used to supply power to the integrated circuit board (1100); A flux circuit board (990) disposed on one side of the integrated circuit board (1100) and used to control the flux tripping device (900). The flux circuit board (990) is electrically connected to the control module.

8. The circuit breaker according to claim 5, characterized in that, A first battery accommodating groove (210) and a second battery accommodating groove (220) are provided on the housing (200). The protection battery module (1400) is installed in the first battery accommodating groove (210) or the second battery accommodating groove (220). The protection battery module (1400) is used to supply power to the circuit breaker when the external power supply is cut off.

9. The circuit breaker according to claim 8, characterized in that, The structures of the first battery accommodating groove (210) and the second battery accommodating groove (220) are different; and / or, the sizes of the first battery accommodating groove (210) and the second battery accommodating groove (220) are different.

10. The circuit breaker according to claim 8, characterized in that, Within the first battery accommodation groove (210), a first fixed limiting rib (211) and a first elastic limiting rib (212) are respectively provided at opposite ends in the length direction of the first battery accommodation groove (210), and opposite ends in the length direction of the protection battery module (1400) are respectively abutted against the first fixed limiting rib (211) and the first elastic limiting rib (212); and / or, Within the second battery accommodation groove (220), a second fixed limiting rib (221) and a second elastic limiting rib (222) are respectively provided at opposite ends in the length direction of the second battery accommodation groove (220), and opposite ends in the length direction of the protection battery module (1400) are respectively abutted against the second fixed limiting rib (221) and the second elastic limiting rib (222).

11. The circuit breaker according to claim 8, characterized in that, An installation guiding rib (223) is provided within the first battery accommodation groove (210) and / or the second battery accommodation groove (220), a guiding inclined surface (2231) is provided on the installation guiding rib (223), a guiding portion (1410) is provided on the protection battery module (1400), and the guiding portion (1410) is attached to the guiding inclined surface (2231) to limit the installation angle of the protection battery module (1400).

12. The circuit breaker according to claim 8, characterized in that, A lead wire groove (230) is further provided on the housing (200), the lead wire groove (230) is used for installing a conductive wire electrically connected to the protection battery module (1400), a first wiring port (213) communicating the lead wire groove (230) and the interior of the first battery accommodation groove (210) is provided on the side wall of the first battery accommodation groove (210), a second wiring port (224) communicating the lead wire groove (230) and the interior of the second battery accommodation groove (220) is provided on the side wall of the second battery accommodation groove (220), and the conductive wire passes through the first wiring port (213) or the second wiring port (224).

13. The circuit breaker according to claim 8, characterized in that, The housing (200) includes a middle cover (201) and an upper cover (202) covering the middle cover (201), the first battery accommodation groove (210) and the second battery accommodation groove (220) are provided on the middle cover (201), a plurality of battery pressing ribs (2021) are provided on the inner top wall of the upper cover (202), the plurality of battery pressing ribs (2021) are arranged opposite to the first battery accommodation groove (210) and the second battery accommodation groove (220), and the battery pressing ribs (2021) are used for pressing the protection battery module (1400) in the first battery accommodation groove (210) or the second battery accommodation groove (220).

14. The circuit breaker according to claim 5, wherein, The circuit breaker further includes an operating mechanism (800) and a flux tripping device (900) provided within the housing (200), and the flux tripping device (900) includes: A first housing (910); A tripping device (920) provided within the first housing (910); A status indicating microswitch (930) and an alarm microswitch (940), both provided within the first housing (910); The first push rod (950) is rotatably connected to the first housing (910). One end of the rotation center of the first push rod (950) is the first trigger end, and the other end is the first driving end (952). The rotating shaft (810) of the operating mechanism (800) can push the first driving end (952) to rotate, so that the first trigger end triggers the trigger button of the status indication microswitch (930). The second push rod (960) is slidably connected to the first housing (910). The second push rod (960) includes a second trigger end (961) disposed inside the first housing (910) and a second driving end (962) extending outside the first housing (910). A trigger portion is provided on the second trigger end (961). The rotating shaft (810) of the operating mechanism (800) can push the second driving end (962) to move, so that the trigger portion triggers the trigger button of the alarm microswitch (940).

15. The circuit breaker according to claim 14, characterized in that, The magnetic flux release (900) further includes a magnetic flux circuit board (990) for controlling the release (920). An elastic buckle (911) is provided at the top of the first housing (910). The magnetic flux circuit board (990) is installed at the top opening of the first housing (910) and is snap-connected to the elastic buckle (911).

16. The circuit breaker according to claim 5, characterized in that, The circuit breaker further includes a current transformer (700) disposed inside the housing (200). The current transformer (700) includes: A second housing (710). Three independent coil cavities are provided inside the second housing (710). Protection pins (711) and metering pins (712) are provided on the side wall of the second housing (710) near each coil cavity. Coils (720). One coil (720) is provided in each coil cavity. The coil (720) is electrically connected to both the protection pin (711) and the metering pin (712). The coil cavity is filled with potting compound. An integrated circuit board (1100) is disposed on the top of the second housing (710). The integrated circuit board (1100) includes a protection module and a metering module. A protection plug is provided on the protection module, and a metering plug is provided on the metering module. The metering plug is inserted into the metering pin (712), and the protection plug is inserted into the protection pin (711).

Images