Protection module and circuit breaker

Abstract

The protection module comprises a magnetic flux release, the magnetic flux release comprises a fixed magnet yoke, a coil framework, a coil, a static iron core, a movable iron core, a push rod and a counter-force spring, and the movable iron core is provided with a movable iron core locking face used for being in locking fit with the push rod matching face; when the magnetic flux release is in a first operation state, the movable iron core locking surface is locked and matched with the push rod matching surface, so that the push rod is locked at a first position, and the movable iron core drives the counter-force spring to store energy; and when the magnetic flux release is in a second operation state, the movable iron core locking surface is separated from the push rod matching surface, and the counter-force spring releases energy to drive the push rod to be switched to a second position. The circuit breaker comprises a protection module. According to the protection module and the circuit breaker provided by the utility model, the movable iron core locking surface used for locking the push rod is directly constructed on the movable iron core, and the push rod can be driven to trip the operating mechanism only through the energy release of one reaction spring, so that the structure is simplified, the tripping action time is shorter, the tripping force is easier to calculate and control, and the tripping performance is more stable.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a protection module and a circuit breaker. Background Art

[0002] The flux release in the circuit breaker of the prior art has many parts and a complicated assembly process. The flux release is provided with multiple torsion springs for linkage release. The time from receiving the release signal to transmitting the release is relatively long. The release force is also affected by the mutual influence between the components, and it is more difficult to control the release force.

[0003] In addition, in the prior art, circuit breakers still have technical problems of low integration and low versatility. Utility Model Content

[0004] The utility model aims to overcome at least one defect of the prior art and provide a protection module and a circuit breaker.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A protection module, for protecting a conductive system, comprising a flux release, the flux release being switched between a first operating state and a second operating state based on electrical parameters of the conductive system, the flux release comprising a fixed yoke, a coil frame mounted on the fixed yoke, a coil sleeved on the coil frame, a static iron core mounted in the coil frame, a moving iron core linearly arranged in the coil frame and arranged opposite to the static iron core, and a push rod for driving a traction rod of an operating mechanism, the push rod being arranged to move and be switchable between a first position and a second position, the push rod driving the traction rod to switch the operating mechanism to a working mode when in the second position, the moving iron core being provided with a moving iron core locking surface for locking and cooperating with a push rod mating surface of the push rod, and the flux release further comprising a reaction spring;

[0007] When the flux releaser is in the first operating state, the locking surface of the moving iron core and the mating surface of the push rod are locked and matched so that the push rod is locked in the first position and cannot move to the second position, and the moving iron core directly drives or indirectly drives the reaction spring through the push rod to store energy; when the flux releaser is in the second operating state, the locking surface of the moving iron core and the mating surface of the push rod are separated, and the reaction spring releases energy to drive the push rod to switch to the second position.

[0008] Optionally, in the direction of movement of the push rod from the first position to the second position, the moving iron core locking surface is located in front of the push rod mating surface; when the flux releaser is in the second operating state, the moving direction of the moving iron core is the direction in which the moving iron core locking surface moves away from the push rod mating surface.

[0009] Optionally, the push rod is arranged for linear movement on one side of the moving iron core, and its moving direction is the same as the moving direction of the moving iron core. The push rod is provided with a push rod fitting portion protruding toward the moving iron core on the side facing the moving iron core, and the side of the push rod fitting portion facing the locking surface of the moving iron core is the push rod fitting surface.

[0010] Optionally, the push rod mating portion is provided with a sliding notch that slidably cooperates with the moving iron core, and the push rod mating portion is slidably disposed on the moving iron core through the sliding notch thereon.

[0011] Optionally, the side of the push rod fitting portion facing away from the locking surface of the moving iron core is the push rod action surface, and the reaction force spring is sleeved on the moving iron core, with one end abutting against the push rod action surface and the other end abutting against the fixed magnetic yoke.

[0012] Optionally, one end of the reaction spring is connected to the push rod; when the flux releaser is in the first operating state, the moving iron core drives the reaction spring to store energy through the gap between the moving iron core locking surface and the push rod mating surface; when the flux releaser is in the second operating state, the reaction spring releases energy and directly drives the push rod to switch to the second position.

[0013] Optionally, the push rod extends at one end away from the traction rod along the movement direction of the push rod to form a push rod guide portion, and the push rod guide portion is slidably arranged in the guide groove.

[0014] Optionally, the magnetic flux release further includes a conical spring connected between the push rod and the moving iron core; when the push rod moves from the second position to the first position, the push rod drives the moving iron core to reset through the conical spring.

[0015] Optionally, the moving iron core is provided with a moving iron core abutment surface opposite to the moving iron core locking surface, and in the movement direction of the push rod, the push rod mating surface is located between the moving iron core locking surface and the moving iron core abutment surface; the conical spring is sleeved on the moving iron core, one end abuts against the moving iron core abutment surface, and the other end abuts against the push rod action surface on the push rod located between the push rod mating surface and the moving iron core abutment surface.

[0016] Optionally, the push rod is provided with a push rod driving part for cooperating with the traction rod drive and a push rod driven part for being driven by the rocker arm of the operating mechanism. In the direction of movement of the push rod from the first position to the second position, the push rod driven part is located in front of the push rod driving part.

[0017] Optionally, the protection module includes a bracket, an electronic protection mechanism and a backup protection mechanism, the bracket has a first mounting portion and a second mounting portion spaced apart in its height direction; the electronic protection mechanism includes the magnetic flux release, the magnetic flux release is mounted on the first mounting portion; the backup protection mechanism is mounted on the second mounting portion and can drive the traction rod to move;

[0018] The operating mechanism includes an action mechanism and a traction rod rotatably arranged on the action mechanism, the traction rod having a first impact portion and a second impact portion spaced apart in the height direction of the bracket; the push rod of the magnetic flux releaser is used to impact the first impact portion; the backup protection mechanism is provided with an impact rod for impacting the second impact portion; the traction rod moves when the push rod impacts the first impact portion and / or when the impact rod impacts the second impact portion.

[0019] Optionally, the second mounting portion is a mounting seat having a through cavity that is integrally formed with the bracket, and the backup protection mechanism is installed in the through cavity.

[0020] Optionally, the backup protection mechanism includes a strike rod, a rotating armature, a fixed iron core, a rotating shaft and a torsion spring, the strike rod is fixed on the rotating armature, the fixed iron core is fixed on the mounting seat, the rotating armature is rotatably arranged on the mounting seat through the rotating shaft, and is arranged opposite to the fixed iron core, and both sides of the mounting seat are provided with rotating shaft holes that cooperate with both ends of the rotating shaft; one end of the torsion spring is fixed on the rotating armature, and the other end of the torsion spring is fixed on the mounting seat or the fixed iron core.

[0021] Optionally, a spring fixing hole is provided on the rotating armature; two partitions are provided on both sides of the mounting seat, and the two partitions are respectively arranged parallel to the two side walls of the mounting seat and spaced apart, and the partitions are integrally connected to the side walls of the mounting seat through a bending connection portion, and a fixing hook is provided on the inner side of one of the partitions; the torsion spring is sleeved on the rotating shaft, one end of the torsion spring is inserted into the spring fixing hole, and the other end of the torsion spring is overlapped on the fixing hook.

[0022] Optionally, the electronic protection mechanism also includes a mutual inductor, and the mutual inductor and the backup protection mechanism are installed on opposite sides of the bracket in the horizontal direction; the bracket is provided with a plurality of limit columns extending along the horizontal direction of the bracket, and the plurality of limit columns are arranged around to enclose a limit cavity adapted to the mutual inductor, and at least one limit column is provided with an inwardly protruding buckle portion for buckling the side of the mutual inductor away from the backup protection mechanism.

[0023] Optionally, the first mounting portion is a mounting cavity having a cavity opening that is integrally formed with the bracket, and the magnetic flux releaser is installed in the mounting cavity; the electronic protection mechanism also includes a mounting plate and a control board electrically connected to the magnetic flux releaser, the mounting plate covers the cavity opening and is connected to the bracket; the control board is installed on the side of the mounting plate away from the magnetic flux releaser; the magnetic flux releaser has a pin; the mounting plate is provided with a clearance hole, and the pin extends out of the mounting plate through the clearance hole and is electrically connected to the control board.

[0024] A circuit breaker comprises a base, a contact system, an operating mechanism and any one of the protection modules, wherein the bracket of the protection module is mounted on the base; the operating mechanism cooperates with the contact system, and the contact system and the operating mechanism are mounted on the base and located on the same side of the bracket.

[0025] The protection module and circuit breaker of the utility model directly construct a moving iron core locking surface for locking the push rod on the moving iron core, and the push rod can be driven to trip the operating mechanism only by releasing energy through a reaction spring. There is no need to additionally set a locking piece for locking the push rod, which reduces the number of transmission stages between the moving iron core and the push rod, and there is no need to set a plurality of elastic pieces, thus simplifying the structure of the magnetic flux releaser, shortening the tripping action time, making the tripping force easier to calculate and control, and making the tripping performance more stable.

[0026] In addition, the locking structure between the moving iron core and the push rod is simple, and the locking is stable and reliable. The moving iron core can directly lock the push rod when it is attracted, and it can be automatically unlocked when the moving iron core is repelled. The design is ingenious and practical.

[0027] In addition, by installing both the electronic protection mechanism and the backup protection mechanism on the bracket, an integrated design of the protection module is achieved, reducing the occupied space. At the same time, the installation of the traction rod on the action mechanism in the existing operating mechanism is not changed, thereby improving the versatility of the protection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the base part of the circuit breaker of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the operating mechanism, protection module, contact system and conductive system of the utility model;

[0030] Figure 3 It is a structural schematic diagram of the support, backup protection mechanism and traction rod of the utility model;

[0031] Figure 4 It is an exploded view of the protection module of the utility model;

[0032] Figure 5 It is an assembly diagram of the magnetic flux release of the utility model;

[0033] Figure 6 It is an exploded view of the magnetic flux release of the utility model;

[0034] Figure 7 It is a structural schematic diagram of the bracket of the utility model;

[0035] Figure 8 It is a structural schematic diagram of the mounting plate of the utility model;

[0036] Bracket 1; mounting cavity 11; limiting step 111; first limiting surface 111a; second limiting surface 111b; mounting seat 12; through cavity 120; shaft hole 121; partition 122; bending connection portion 123; fixing hook 124; limiting column 13; buckle portion 131; magnetic flux release 2; push rod 21; push rod matching portion 211; push rod matching surface 211a; push rod action surface 211b; sliding notch 211c; push rod guide portion 212; push rod driving portion 213; push rod driven portion 214; moving iron core 22; moving iron core locking surface 221; moving iron core stop Joint 222; coil positioning plate 23; fixed yoke 24; fourth limiting surface 241; coil 25; coil skeleton 26; reaction spring 27; conical spring 28; pin 29; transformer 3; mounting plate 4; clearance hole 41; third limiting surface 42; control board 5; operating mechanism 6; rocker arm 61; traction rod 62; first impact part 621; second impact part 622; backup protection mechanism 7; impact rod 71; rotating armature 72; spring fixing hole 721; fixed iron core 73; rotating shaft 74; torsion spring 75; conductive system 8; base 9; contact system 10. DETAILED DESCRIPTION

[0037] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the protection module and circuit breaker of the utility model. The protection module and circuit breaker of the utility model are not limited to the description of the following embodiments.

[0038] like Figure 1 and Figure 2As shown, the circuit breaker of this embodiment includes a base 9, a contact system 10, an operating mechanism 6 and a protection module. The contact system 10 has an off state for disconnecting the conductive system 8 and an on state for connecting the conductive system 8, and the contact system 10 includes a moving contact and a stationary contact. The operating mechanism 6 cooperates with the contact system 10, and the operating mechanism 6 is connected to the moving contact of the contact system 10, driving the moving contact to swing and contact and separate with the stationary contact, so as to perform closing and opening operations. The operating mechanism 6 generally includes a connecting rod structure of a lock catch and a trip catch that are snap-fitted. The connecting rod structure is a four-bar or five-bar structure. The connecting rod structure is connected to the moving contact. The operating mechanism 6 has a tripping state and a re-snapping state. When the operating mechanism 6 is in the re-snapping state, that is, when the lock catch and the trip catch are in a snap-fitting state, the connecting rod structure can drive the moving contact to swing. The operating mechanism 6 in the re-snapping state, that is, the operating mechanism 6 in which the lock catch and the trip catch are in a snap-fitting state, can drive the moving contact to swing. The operating mechanism 6 can drive the contact system 10 to conduct the conductive system 8. At this time, the operating mechanism 6 can perform closing and opening operations. The operating mechanism 6 in the tripping state, that is, the lock catch and the trip catch release the snap-fitting, the moving contact of the connecting rod structure is separated from the static contact, so that the contact system 10 disconnects the conductive system 8, and at this time the operating mechanism 6 cannot drive the moving contact to perform the closing operation. The lock catch and the trip catch need to be snap-fitted again to enter the re-snapping state. The operating mechanism 6 includes an action mechanism and a traction rod 62 rotatably arranged on the action mechanism. The traction rod 62 is used to switch the working mode of the operating mechanism 6. The tripping state and the re-locking state of the operating structure 6 are switched by the protection module driving the traction rod 62, that is, the protection module drives the traction rod 62 to directly or indirectly drive the lock to move, release the lock and the tripping lock, and make the operating structure 6 enter the tripping state from the re-locking state. The protection module is used to protect the conductive system 8. When it is detected that the contact system 10 and the main circuit where the conductive system 8 are located have a fault, the traction rod 62 is driven. The protection module can realize overload, short circuit, leakage and / or overvoltage protection. In this embodiment, the protection module includes an electronic protection mechanism and a backup protection mechanism 7. The electronic protection mechanism and the backup protection mechanism 7 both have a tripping member. The tripping member drives the traction rod 62 under the action of an external force, so that the operating mechanism 6 of the circuit breaker in the closing state is switched from the re-locking state to the tripping state. At the same time, the operating mechanism 6 drives the moving contact and the static contact to separate, and the circuit breaker is tripped and opened. The operating mechanism 6 in the tripped state can be driven by the handle to move in the opening direction, so as to drive the lock catch and the jump catch to re-engage and enter the re-engagement state. It should be noted that the electronic protection mechanism and the backup protection mechanism 7 are both used to drive the traction rod 62 to move, and the two complement each other in execution and do not interfere with each other.

[0039] It should be noted that the action mechanism of the operating mechanism 6 is the existing technology, which usually includes a frame, a handle, a rocker arm 61, an energy storage spring, a connecting rod, a crank, a lock and a jumper connected by a buckle. The frame is installed on the base 9, and the rocker arm 61 is rotatably installed on the frame. The jumper, the lock and the traction rod 62 are rotatably set on the frame respectively. The lock is hasp-connected with the jumper, and the traction rod 62 is limitedly connected with the lock. The crank is rotatably installed on the jumper through the crank shaft, one end of the connecting rod is rotatably connected to the crank through a spring shaft, and the other end is directly or indirectly connected to the moving contact of the contact system 10, which is used to drive the moving contact of the contact system 10 to rotate, and one end of the energy storage spring is connected to the rocker arm 61, and the other end is connected to the spring shaft at the connection between the connecting rod and the crank. The rocker arm 61, crank, lock, trip latch, connecting rod and energy storage spring constitute the connecting rod structure of the operating mechanism. The lock and trip latch connected by the buckle limit the rotation position of the crank so that the crank can rotate with the trip latch as the rotation center. The handle drives the rocker arm 61 to swing, and the rocker arm 61 drives the crank and connecting rod to rotate, and then the connecting rod drives the contact system 10 to rotate to turn on and off the conductive system 8, thereby realizing the closing and opening of the circuit breaker.

[0040] like Figure 2-Figure 6 As shown, the electronic protection mechanism of this embodiment includes a flux release 2, and the flux release 2 switches between a first operating state and a second operating state based on the electrical parameters of the conductive system 8. It should be noted that the electrical parameter can be voltage or current. For example, when the voltage exceeds a preset voltage threshold, the flux release 2 drives the traction rod 62 to switch the operating mechanism 6 from the re-arrest state to the tripping state; or when the current exceeds a preset threshold, the electronic module drives the traction rod 62 to switch the operating mechanism 6 from the re-arrest state to the tripping state. When the operating mechanism 6 is in the re-arrest state, the circuit breaker can perform opening and closing operations.

[0041] The magnetic flux release 2 of this embodiment includes a fixed yoke 24, a coil frame 26 mounted on the fixed yoke 24, a coil 25 sleeved on the coil frame 26, a static iron core (not shown in the figure) mounted in the coil frame 26, a moving iron core 22 linearly arranged in the coil frame 26 and arranged opposite to the static iron core, and a push rod 21 as a release member of the electronic protection mechanism. The fixed yoke 24 may include a plurality of yoke pieces, which are connected as a whole by riveting, threading, and clamping. The fixed yoke 24 is formed with an installation space for installing the coil frame 26 sleeved with the coil 25 and the static iron core to protect the coil 25, the coil frame 26 and the static iron core. A coil positioning plate 23 is also provided in the installation space, and a coil positioning hole is provided on the coil positioning plate 23 for the coil 25 to pass through. The push rod 21 is arranged to move and can switch between a first position and a second position. When the push rod 21 is in the second position, it drives the traction rod 62 to switch the operating mechanism 6 to a working mode.

[0042] An improvement of the present application is that the moving iron core 22 is provided with a moving iron core locking surface 221 for locking and cooperating with the push rod mating surface 211a of the push rod 21, and the magnetic flux release 2 also includes a reaction spring 27. In this embodiment, the static iron core is a permanent magnet. Figure 5 and Figure 6 As shown, when the flux release 2 is in the first operating state, the moving iron core 22 is attracted backwards to the stationary iron core, so that the moving iron core locking surface 221 is locked and matched with the push rod matching surface 211a, so that the push rod 21 is locked in the first position and cannot move to the second position, and the moving iron core 22 directly drives or indirectly drives the reaction spring 27 through the push rod 21 to store energy; when the flux release 2 is in the second operating state, the electromagnetic field generated by the energization of the coil 25 offsets the magnetic field of the stationary iron core, so that the moving iron core 22 is repelled forward from the stationary iron core, so that the moving iron core locking surface 221 is separated from the push rod matching surface 211a, and the reaction spring 27 releases energy to drive the push rod 21 to switch forward to the second position. The protection module of this embodiment directly constructs a moving iron core locking surface 221 for locking the push rod 21 on the moving iron core 22, and the push rod 21 can be driven to release the operating mechanism only by releasing energy through a reaction spring 27, without the need to set an additional locking member for locking the push rod 21, reducing the number of transmission levels between the moving iron core 22 and the push rod 21, and without setting multiple elastic members, simplifying the structure of the flux release 2, and shortening the tripping action time, making the tripping force easier to calculate and control, and making the tripping performance more stable. It should be noted that the working principle of the flux release 2 is the prior art. Of course, as other embodiments, the static iron core may not be a permanent magnet, the flux release 2 is energized, and enters the first operating state, and the electromagnetic field generated by the coil 25 is energized to attract the moving iron core 22 and the static iron core; the flux release 2 is not energized, and enters the second operating state, and the moving iron core 22 and the static iron core are repelled.

[0043] Furthermore, in the direction in which the push rod 21 moves from the first position to the second position, the movable iron core locking surface 221 is located in front of the push rod mating surface 211a; when the magnetic flux release 2 is in the second operating state, the moving direction of the movable iron core 22 is the direction in which the movable iron core locking surface 221 moves away from the push rod mating surface 211a. The movable iron core locking surface 221 directly blocks the push rod mating surface 211a to lock the push rod 21 so that the push rod 21 cannot move toward the traction rod 62, and the movable iron core 22 is pushed forward to push the movable iron core locking surface 221 away from the push rod mating surface 211a to unlock the push rod 21. The movable gap between the movable iron core locking surface 221 and the push rod mating surface 211a is sufficient for the push rod 21 to drive the traction rod 62. The locking structure between the movable iron core 22 and the push rod 21 is simple, and the locking is stable and reliable. The movable iron core 22 can directly lock the push rod 21 when it is attracted, and it is automatically unlocked when the movable iron core 22 is pushed away. The design is ingenious and practical.

[0044] Specifically, the push rod 21 is arranged on one side of the moving iron core 22 for linear movement, and its moving direction is the same as that of the moving iron core 22. The push rod 21 is provided with a push rod matching portion 211 protruding toward the moving iron core 22 on the side facing the moving iron core 22, and the side of the push rod matching portion 211 facing the moving iron core locking surface 221 is the push rod matching surface 211a. The push rod matching portion 211 is provided with a sliding notch 211c for slidingly matching with the moving iron core 22, and the push rod matching portion 211 is slidably arranged on the moving iron core 22 through the sliding notch 211c thereon. The push rod 21 extends along the moving direction of the push rod 21 at one end away from the traction rod 62 to form a push rod guide portion 212, and the push rod guide portion 212 is slidably arranged in the guide groove.

[0045] like Figure 5 and Figure 6 As shown, the installation structure of the reaction spring 27 of this embodiment, one end of the reaction spring 27 is movable and connected to the push rod 21, and the other end of the reaction spring 27 is fixed, that is, it can be connected to a reasonable position on the non-movable part; when the magnetic flux releaser 2 is in the first operating state, the moving iron core 22 drives the reaction spring 27 to store energy through the moving iron core locking surface 221 and the push rod matching surface 211a; when the magnetic flux releaser 2 is in the second operating state, the reaction spring 27 releases energy and directly drives the push rod 21 to switch to the second position. Specifically, the side of the push rod matching part 211 facing away from the moving iron core locking surface 221 is the push rod action surface 211b, and the reaction spring 27 is sleeved on the moving iron core 22, one end abuts on the push rod action surface 211b, and the other end abuts on the fixed yoke 24. The layout is compact and reasonable, which is conducive to the miniaturization design of the magnetic flux releaser 2, and the various components will not interfere with each other. Of course, as other embodiments, the movable end of the reaction spring 27 may be connected to the moving iron core 22; when the flux releaser 2 is in the first operating state, the moving iron core 22 directly drives the reaction spring 27 to store energy; when the flux releaser 2 is in the second operating state, the reaction spring 27 releases energy and indirectly drives the push rod 21 to switch to the second position through the moving iron core 22.

[0046] like Figure 3 and Figure 6As shown in the figure, the structure between the push rod 21 and the operating mechanism 6 of this embodiment, the push rod 21 is provided with a push rod driving portion 213 for driving and cooperating with the traction rod 62 and a push rod driven portion 214 for being driven by the rocker arm 61 of the operating mechanism 6, and in the direction of the push rod 21 moving from the first position to the second position, the push rod driven portion 214 is located in front of the push rod driving portion 213. Preferably, the push rod driving portion 213 is a protruding structure on the opposite side of the push rod matching portion 211 on the push rod 21. When the push rod 21 moves from the first position to the second position, the push rod driving portion 213 pushes the traction rod 62 to disengage the operating mechanism 6; when the operating mechanism 6 moves in the opening direction to make the operating mechanism 6 buckle again, the rocker arm 61 pushes the push rod driven portion 214 to separate the push rod driving portion 213 from the traction rod 62.

[0047] like Figure 5 and Figure 6 As shown, the magnetic flux release 2 of this embodiment also includes a conical spring 28 connected between the push rod 21 and the moving iron core 22; when the push rod 21 moves from the second position to the first position, the push rod 21 drives the moving iron core 22 to reset through the conical spring 28. When the operating mechanism 6 moves in the opening direction to make the operating mechanism 6 buckle again, the rocker arm 61 pushes the push rod driven part 214 to make the push rod 21 move from the second position to the first position, and the push rod 21 drives the moving iron core 22 to re-engage with the static iron core through the conical spring 28. Specifically, the moving iron core 22 is provided with a moving iron core abutting surface 222 opposite to the moving iron core locking surface 221, and in the moving direction of the push rod 21, the push rod matching surface 211a is located between the moving iron core locking surface 221 and the moving iron core abutting surface 222. The conical spring 28 is sleeved on the movable iron core 22, with one end abutting against the movable iron core abutting surface 222, and the other end abutting against the push rod action surface 211b on the push rod 21 between the push rod matching surface 211a and the movable iron core abutting surface 222. Preferably, the small diameter end of the conical spring 28 abuts against the movable iron core abutting surface 222, and the large diameter end of the conical spring 28 abuts against the push rod action surface 211b, so that the conical spring 28 is more stable.

[0048] Another improvement of the present application is that Figure 1-Figure 4As shown, the protection module of this embodiment also includes a bracket 1, which is mounted on the base 9, and the contact system 10 and the operating mechanism 6 are mounted on the base 9 on the same side of the bracket 1. The bracket 1 has a first mounting portion and a second mounting portion spaced apart in the height direction thereof; the electronic protection mechanism includes the magnetic flux release 2, which is mounted on the first mounting portion; and the backup protection mechanism 7 is mounted on the second mounting portion. The traction rod 62 has a first impact portion 621 and a second impact portion 622 spaced apart in the height direction of the bracket 1; the push rod 21 of the magnetic flux release 2 is used to impact the first impact portion 621; the backup protection mechanism 7 is provided with an impact rod 71 for impacting the second impact portion 622, that is, the impact rod 71 is a release member of the backup protection mechanism 7; when the push rod 21 impacts the first impact portion 621 and / or when the impact rod 71 impacts the second impact portion 622, the traction rod 62 moves. The protection module of this embodiment realizes an integrated design of the protection module by installing both the electronic protection mechanism and the backup protection mechanism 7 on the bracket 1, thereby reducing the occupied space. At the same time, the traction rod 62 in the existing operating mechanism 6 is not changed and installed on the action mechanism, thereby improving the versatility of the protection module.

[0049] like Figure 3 , Figure 4 and Figure 7 As shown, in the installation structure of the backup protection mechanism 7 in this embodiment, the second installation part is a mounting seat 12 having a through cavity 120 integrally formed with the bracket 1, and the backup protection mechanism 7 is installed in the through cavity 120. The backup protection mechanism 7 is directly fixed in the mounting seat 12 on the bracket 1, which simplifies the assembly process. Specifically, the backup protection mechanism 7 includes a strike rod 71, a rotating armature 72, a fixed iron core 73, a rotating shaft 74 and a torsion spring 75, the strike rod 71 is fixed on the rotating armature 72, the fixed iron core 73 is fixed on the mounting seat 12, the rotating armature 72 is rotatably arranged on the mounting seat 12 through the rotating shaft 74, and is arranged opposite to the fixed iron core 73, and the two sides of the mounting seat 12 are provided with a rotating shaft hole 121 that cooperates with the two ends of the rotating shaft 74; one end of the torsion spring 75 is fixed on the rotating armature 72, and the other end of the torsion spring 75 is fixed on the mounting seat 12 or the fixed iron core 73.

[0050] The conductive system 8 passes through the through cavity 120. When the current generated by the conductive system 8 is sufficient to magnetize the fixed core 73 to generate a strong magnetic field, the rotating armature 72 generates an electromagnetic force under the action of the magnetic field. The electromagnetic force can overcome the resistance of the torsion spring 75 to rotate the rotating armature 72, thereby driving the striking rod 71 to move to trigger the driving traction rod 210 to move and release it. When the current decreases, the magnetic field strength generated by the fixed core 73 becomes weaker, and the rotating armature 72 is driven by the torsion spring 75 to drive the striking rod 71 to disengage from the traction rod 62, so that the traction rod 62 is reset.

[0051] Preferably, the rotating armature 72 and the fixed iron core 73 are U-shaped structures, and are arranged in a manner of openings facing each other. A spring fixing hole 721 is provided on one end of the rotating armature 72 away from the fixed iron core 73; and through holes for the rotating shaft 74 to pass through are provided on the two arms of the rotating armature 72. Two partitions 122 located on both sides are provided in the mounting seat 12, and the two partitions 122 are respectively arranged parallel to the two side walls of the mounting seat 12 and spaced apart. The partitions 122 and the side walls of the mounting seat 12 are integrally connected through a bent connecting portion 123, and a fixing hook 124 is provided on the inner side of one of the partitions 122; one arm of the rotating armature 72 and one arm of the fixed iron core 73 are arranged vertically and relatively between one partition 122 and one side wall of the mounting seat 12, and the other arm of the rotating armature 72 and the other arm of the fixed iron core 73 are arranged vertically and relatively between the other partition 122 and the other side wall of the mounting seat 12. In the height direction of the bracket 1, the rotating shaft 74 is located between the end of the rotating armature 72 away from the fixed iron core 73 and the partition 72; the torsion spring 75 is sleeved on the rotating shaft 74, one end of the torsion spring 75 is inserted into the spring fixing hole 721 of the rotating armature 72, and the other end of the torsion spring 75 is overlapped on the fixing hook 124 of the mounting seat 12. The force arm fixing position and fixing structure at both ends of the torsion spring 75 are optimized to achieve that the force arm of the torsion spring 75 is not easy to fall out when the backup protection mechanism 7 is actuated, and the force arm fixing positions at both ends of the torsion spring 75 are close to the installation position of the torsion spring 75 (rotating shaft 74), so that the length of the force arm at both ends of the torsion spring 75 is not limited, thereby improving versatility.

[0052] like Figure 2 and Figure 4As shown, the electronic protection mechanism of this embodiment also includes a mutual inductor 3, and the mutual inductor 3 and the backup protection mechanism 7 are installed on opposite sides of the bracket 1 in the horizontal direction. The conductive system 8 passes through the central hole of the mutual inductor 3 and then passes through the through cavity 120 of the bracket 1 and is connected to the contact system 10. The bracket 1 is provided with a plurality of limit posts 13 extending in the horizontal direction of the bracket 1. The plurality of limit posts 13 are arranged around to surround and form a limit cavity adapted to the mutual inductor 3, and at least one limit post 13 is provided with a buckle portion 131 protruding inwardly, which is used to buckle the side of the mutual inductor 3 away from the backup protection mechanism 7. The plurality of limit posts 13 arranged around are used to fix the mutual inductor 3, which has a simple structure, is easy to install and is firm, and is also conducive to heat dissipation.

[0053] like Figure 4-Figure 7 As shown, the installation structure of the electronic protection mechanism in this embodiment, the first installation part is a mounting cavity 11 with a cavity formed integrally with the bracket 1, and the magnetic flux release 2 is installed in the mounting cavity 11; the electronic protection mechanism also includes a mounting plate 4 and a control board 5 electrically connected to the magnetic flux release 2, the mounting plate 4 covers the cavity and is connected to the bracket 1; the control board 5 is installed on the side of the mounting plate 4 away from the magnetic flux release 2; the coil skeleton 26 of the magnetic flux release 2 has a pin 29; the mounting plate 4 is provided with a clearance hole 41, and the pin 29 extends out of the mounting plate 4 through the clearance hole 41 and is electrically connected to the control board 5.

[0054] like Figure 2 As shown, the mutual inductor 3 is electrically connected to the control board 5 for collecting the electrical parameters and detecting whether there are faults such as overload, short circuit, undervoltage, and overvoltage. The flux release 2 is electrically connected to the control board 5; the control board 5 is configured to: based on the electrical parameters, control the flux release 2 to switch between the first operating state and the second operating state; wherein, when the flux release 2 is in the first operating state, the operating mechanism 6 is in the re-locking state; when the flux release 2 is in the second operating state, the operating mechanism 6 is driven to trip, so that the operating mechanism 6 enters the tripping state. It should be noted that the conductive system 8 passes through the mutual inductor 3, so that the mutual inductor 3 generates an induced current or an induced voltage. The induced current or the induced voltage is transmitted to the control board 5. The control board 5 compares the obtained induced current with the current threshold or the induced voltage with the voltage threshold to determine whether to output a tripping signal to the flux release 2.

[0055] like Figure 6-Figure 8As shown, in the present embodiment, the specific structure of the guide groove for guiding the push rod 21, a limiting step 111 is provided in the mounting cavity 11 of the bracket 1, the limiting step 111 has a first limiting surface 111a arranged opposite to the mounting plate 4 and a second limiting surface 111b opposite to the fixed yoke 24, a third limiting surface 42 is provided on the mounting plate 4, and a fourth limiting surface 241 is provided on the side of the fixed yoke 24 facing the limiting step 111, and the guide groove is formed by surrounding the first limiting surface 111a, the second limiting surface 111b, the third limiting surface 42 and the fourth limiting surface 241.

[0056] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0057] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A protection module for protecting a conductive system (8), comprising a magnetic flux release (2), wherein the magnetic flux release (2) switches between a first operating state and a second operating state based on electrical parameters of the conductive system (8), wherein the magnetic flux release (2) comprises a fixed magnetic yoke (24), a coil frame (26) mounted on the fixed magnetic yoke (24), a coil (25) sleeved on the coil frame (26), a static iron core mounted in the coil frame (26), a moving iron core (22) linearly arranged in the coil frame (26) and arranged opposite to the static iron core, and a push rod (21) for driving a traction rod (62) of an operating mechanism (6), wherein the push rod (21) is arranged to move and can switch between a first position and a second position, and when the push rod (21) is in the second position, the traction rod (62) is driven to switch the operating mechanism (6) to a different operating mode, wherein: The movable iron core (22) is provided with a movable iron core locking surface (221) for locking and cooperating with a push rod matching surface (211a) of the push rod (21); the magnetic flux release (2) further comprises a reaction force spring (27); When the magnetic flux release (2) is in a first operating state, the movable iron core locking surface (221) and the push rod matching surface (211a) are locked and matched so that the push rod (21) is locked in the first position and cannot move to the second position, and the movable iron core (22) directly drives or indirectly drives the reaction force spring (27) through the push rod (21) to store energy; when the magnetic flux release (2) is in a second operating state, the movable iron core locking surface (221) and the push rod matching surface (211a) are separated, and the reaction force spring (27) releases energy to drive the push rod (21) to switch to the second position.

2. The protection module according to claim 1, characterized in that: In the direction in which the push rod (21) moves from the first position to the second position, the movable iron core locking surface (221) is located in front of the push rod matching surface (211a); when the magnetic flux releaser (2) is in the second operating state, the moving direction of the movable iron core (22) is the direction in which the movable iron core locking surface (221) moves away from the push rod matching surface (211a).

3. The protection module according to claim 2, characterized in that: The push rod (21) is arranged to move linearly on one side of the moving iron core (22), and its moving direction is the same as the moving direction of the moving iron core (22). The push rod (21) is provided with a push rod matching portion (211) protruding toward the moving iron core (22) on the side facing the moving iron core (22), and the side of the push rod matching portion (211) facing the moving iron core locking surface (221) is the push rod matching surface (211a).

4. The protection module according to claim 3, characterized in that: The push rod matching portion (211) is provided with a sliding notch (211c) that is slidably matched with the moving iron core (22); the push rod matching portion (211) is slidably arranged on the moving iron core (22) through the sliding notch (211c) thereon.

5. The protection module according to claim 4, characterized in that: The side of the push rod matching portion (211) facing away from the movable iron core locking surface (221) is a push rod action surface (211b), and the reaction force spring (27) is sleeved on the movable iron core (22), with one end abutting against the push rod action surface (211b) and the other end abutting against the fixed magnetic yoke (24).

6. The protection module according to claim 1, characterized in that: One end of the reaction spring (27) is connected to the push rod (21); when the magnetic flux releaser (2) is in a first operating state, the moving iron core (22) drives the reaction spring (27) to store energy through the moving iron core locking surface (221) and the push rod matching surface (211a); when the magnetic flux releaser (2) is in a second operating state, the reaction spring (27) releases energy to directly drive the push rod (21) to switch to a second position.

7. The protection module according to claim 1, characterized in that: The push rod (21) extends at one end away from the traction rod (62) along the movement direction of the push rod (21) to form a push rod guide portion (212), and the push rod guide portion (212) is slidably arranged in the guide groove.

8. The protection module according to any one of claims 1 to 7, characterized in that: The magnetic flux release (2) further comprises a conical spring (28) connected between the push rod (21) and the moving iron core (22); when the push rod (21) moves from the second position to the first position, the push rod (21) drives the moving iron core (22) to reset via the conical spring (28).

9. The protection module according to claim 8, characterized in that: The movable iron core (22) is provided with a movable iron core abutting surface (222) opposite to the movable iron core locking surface (221); in the movement direction of the push rod (21), the push rod matching surface (211a) is located between the movable iron core locking surface (221) and the movable iron core abutting surface (222); the conical spring (28) is sleeved on the movable iron core (22), one end of the conical spring abuts against the movable iron core abutting surface (222), and the other end of the conical spring abuts against the push rod (21) on the push rod (21) between the push rod matching surface (211a) and the movable iron core abutting surface (222).

10. The protection module according to claim 1, characterized in that: The push rod (21) is provided with a push rod driving portion (213) for cooperating with the traction rod (62) and a push rod driven portion (214) for being driven by the rocker arm (61) of the operating mechanism (6); in the direction in which the push rod (21) moves from the first position to the second position, the push rod driven portion (214) is located in front of the push rod driving portion (213).

11. The protection module according to claim 1, characterized in that: The protection module comprises a bracket (1), an electronic protection mechanism and a backup protection mechanism (7), wherein the bracket (1) has a first mounting portion and a second mounting portion spaced apart in its height direction; the electronic protection mechanism comprises the magnetic flux release (2), and the magnetic flux release (2) is mounted on the first mounting portion; the backup protection mechanism (7) is mounted on the second mounting portion and can drive the traction rod (62) to move; The operating mechanism (6) comprises an action mechanism and a traction rod (62) rotatably arranged on the action mechanism, the traction rod (62) having a first impact part (621) and a second impact part (622) arranged at intervals in the height direction of the bracket (1); the push rod (21) of the magnetic flux release (2) is used to impact the first impact part (621); the backup protection mechanism (7) is provided with an impact rod (71) used to impact the second impact part (622); when the push rod (21) impacts the first impact part (621) and / or when the impact rod (71) impacts the second impact part (622), the traction rod (62) moves.

12. The protection module according to claim 11, characterized in that: The second mounting portion is a mounting seat (12) having a through cavity (120) formed integrally with the bracket (1), and the backup protection mechanism (7) is mounted in the through cavity (120).

13. The protection module according to claim 12, characterized in that: The backup protection mechanism (7) comprises a striking rod (71), a rotating armature (72), a fixed iron core (73), a rotating shaft (74) and a torsion spring (75); the striking rod (71) is fixed on the rotating armature (72); the fixed iron core (73) is fixed on the mounting seat (12); the rotating armature (72) is rotatably arranged on the mounting seat (12) through the rotating shaft (74) and is arranged opposite to the fixed iron core (73); rotating shaft holes (121) matching with two ends of the rotating shaft (74) are provided on both sides of the mounting seat (12); one end of the torsion spring (75) is fixed on the rotating armature (72); and the other end of the torsion spring (75) is fixed on the mounting seat (12) or the fixed iron core (73).

14. The protection module according to claim 13, characterized in that: The rotating armature (72) is provided with a spring fixing hole (721); the mounting seat (12) is provided with two partitions (122) located on both sides, the two partitions (122) are respectively arranged parallel to the two side walls of the mounting seat (12) and spaced apart, the partitions (122) and the side walls of the mounting seat (12) are integrally connected via a bent connecting portion (123), and a fixing hook (124) is provided on the inner side of one of the partitions (122); the torsion spring (75) is sleeved on the rotating shaft (74), one end of the torsion spring (75) is inserted into the spring fixing hole (721), and the other end of the torsion spring (75) is overlapped on the fixing hook (124).

15. The protection module according to claim 11, characterized in that: The electronic protection mechanism also includes a mutual inductor (3), wherein the mutual inductor (3) and the backup protection mechanism (7) are mounted on opposite sides of the bracket (1) in a horizontal direction; the bracket (1) is provided with a plurality of limit posts (13) extending in a horizontal direction of the bracket (1), wherein the plurality of limit posts (13) are arranged around to enclose a limit cavity adapted to the mutual inductor (3), and at least one limit post (13) is provided with an inwardly protruding buckle portion (131) for buckling a side of the mutual inductor (3) away from the backup protection mechanism (7).

16. The protection module according to claim 11, characterized in that: The first mounting portion is a mounting cavity (11) having a cavity opening which is integrally formed with the bracket (1), and the magnetic flux releaser (2) is mounted in the mounting cavity (11); the electronic protection mechanism further comprises a mounting plate (4) and a control plate (5) electrically connected to the magnetic flux releaser (2), the mounting plate (4) covering the cavity opening and connected to the bracket (1); the control plate (5) is mounted on a side of the mounting plate (4) away from the magnetic flux releaser (2); the magnetic flux releaser (2) has a plug pin (29); the mounting plate (4) is provided with a clearance hole (41), and the plug pin (29) extends out of the mounting plate (4) through the clearance hole (41) and is electrically connected to the control plate (5).

17. A circuit breaker, characterized in that: It comprises a base (9), a contact system (10), an operating mechanism (6) and a protection module according to any one of claims 1 to 16, wherein the bracket (1) of the protection module is mounted on the base (9); the operating mechanism (6) cooperates with the contact system (10), and the contact system (10) and the operating mechanism (6) are mounted on the base (9) and located on the same side of the bracket (1).

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