Pole type magnetic control circuit breaker

Abstract

The utility model relates to a pole type magnetic control circuit breaker, which relates to the technical field of electrical equipment, and comprises a shell connected with a pole, a mechanism bottom plate arranged at one end, far away from the pole, of the shell, a movable iron core arranged in the shell and a static iron core arranged in the shell, and an insulating pull rod connected with a movable contact of the pole is also arranged in the shell. The static iron core and the movable iron core are coaxially arranged, the movable iron core is movably close to the static iron core, one end, far away from the pole, of the insulating pull rod penetrates through the static iron core and is connected with the movable iron core, and a moving part for driving the movable iron core to move towards the static iron core is arranged in the shell. And the insulating pull rod is provided with a separating piece which is used for keeping the movable iron core separated from the static iron core during power failure. The transmission precision of the circuit breaker is improved, the operation power of the circuit breaker is reduced, and the service life of the circuit breaker is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a pole-type magnetically controlled circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their applicable scope, and according to their different scope of use, circuit breakers are also divided into circuit breakers with spring operating mechanisms and permanent magnetic structure circuit breakers.

[0003] Common circuit breakers with spring operating mechanisms can realize manual opening and closing as well as electric opening and closing operations when realizing the opening and closing operations of the moving and static contacts. However, circuit breakers with spring operating mechanisms require multiple connecting rod operations, which leads to many parts in the circuit breaker and a complex structure. In addition, the life of the mechanical structure in the circuit breaker is short, so frequent maintenance and replacement of parts are required; common permanent magnet structure circuit breakers have few parts, simple structure and long life, but their operating mechanisms are large in size, which is not conducive to miniaturization. The large operating current requires higher electrical components to cooperate, and there are still a large number of mechanical transmissions that require high processing accuracy, so there is room for improvement. Utility Model Content

[0004] In order to improve the transmission accuracy of the circuit breaker, reduce the operating power of the circuit breaker, and increase the service life of the circuit breaker, the present application provides a pole-type magnetically controlled circuit breaker.

[0005] The present application provides a pole-type magnetically controlled circuit breaker adopts the following technical solution:

[0006] A pole-type magnetically controlled circuit breaker comprises a shell connected to the pole, a mechanism bottom plate arranged at one end of the shell away from the pole, a moving iron core arranged in the shell and a stationary iron core arranged in the shell, an insulating pull rod connected to the moving contact of the pole is also arranged in the shell, the stationary iron core and the moving iron core are coaxially arranged, and the moving iron core moves close to the stationary iron core, the end of the insulating pull rod away from the pole passes through the stationary iron core and is connected to the moving iron core, a moving part driving the moving iron core to move toward the stationary iron core is arranged in the shell, and a separating part for keeping the moving iron core and the stationary iron core separated when the power is off is arranged on the insulating pull rod; a receiving groove is provided on the side where the moving iron core and the stationary iron core are close to each other, the moving part comprises a coil arranged in the receiving groove, positive / reverse current flows in the coil, and the stationary iron core and the moving iron core are both paramagnetic cores.

[0007] By adopting the above technical scheme, when it is necessary to close and open the moving contact and the static contact in the pole, the technician only needs to pass the forward and reverse currents into the coil. When it is necessary to close the circuit, the technician passes the forward current into the coil. Since the moving iron core and the static iron core are both paramagnetic cores, when the forward current is passed, the moving iron core and the static iron core generate electromagnetic force and attract each other. The moving iron core moves toward the static iron core, thereby driving the insulating pull rod to move toward the pole, thereby achieving the fitting of the moving contact and the static contact in the pole, and achieving the closing of the equipment; when the reverse current is passed, the moving iron core and the static iron core generate repulsive force, thereby causing the moving iron core to move in the direction away from the static iron core, driving the insulating pull rod to move in the direction away from the pole, thereby achieving the opening; by adopting the electromagnetic structure, the accuracy difference caused by the mechanical structure is reduced, the transmission accuracy is improved, and at the same time, the impact of the life of the mechanical structure is reduced, the service life of the equipment is improved, and at the same time, the space problems caused by the mechanical structure are reduced, which is convenient for the opening and closing of the micro circuit.

[0008] Optionally, a first screw is provided at one end of the insulating pull rod, and a second screw is provided at the other end of the insulating pull rod, the first screw is connected to the pole, the middle diameter of the insulating pull rod is larger than the diameters of the first screw and the second screw, the separating piece includes a contact spring sleeved on the second screw, one end of the contact spring is tightly pressed against the end side of the insulating pull rod with a larger diameter, the other end of the contact spring is tightly pressed against the inner bottom wall of the accommodating groove of the moving iron core, and the initial state of the contact spring is a compressed state.

[0009] By adopting the above technical scheme, in the initial state, the contact spring is in a compressed state, so that under the action of the elastic restoring force, the moving iron core and the static iron core are always kept separated, thereby realizing the opening state when no power is supplied, ensuring the normal operation of the circuit breaker, and when the positive current is passed, the attraction between the moving iron core and the static iron core is greater than the elastic restoring force of the contact spring, so that the moving iron core moves toward the static iron core, so that the insulating pull rod at this time moves toward the pole, so that the moving contact of the pole and the static contact are fitted together, and closing is realized; when opening is required, at this time, the technician passes a reverse current into the coil, and at this time, under the action of the elastic restoring force of the contact spring and the repulsive force between the moving and static iron cores, the insulating pull rod moves in the direction away from the pole, thereby realizing the opening operation; because when the coil is energized, the electromagnetic force (attractive force or repulsive force) generated is an instantaneous force, and the contact spring provided reduces the mechanical damage caused by the separation and fitting of the moving iron core and the static iron core, and generates a buffer when the moving iron core and the static iron core move close to each other.

[0010] Optionally, the separation member also includes a circular spring arranged on the outer periphery of the contact spring, one end of the circular spring is tightly pressed against the inner bottom wall of the receiving groove of the static iron core, and the other end of the circular spring is tightly pressed against the inner bottom wall of the receiving groove of the moving iron core.

[0011] By adopting the above technical solution, the circular spring is sleeved on the outer peripheral side of the contact spring, and the buffer between the moving iron core and the static iron core is further improved by the arranged circular spring and contact spring, thereby reducing the mechanical collision damage between the moving iron core and the static iron core.

[0012] Optionally, a fixing part for maintaining a stable connection between the shell and the mechanism bottom plate is provided on the mechanism bottom plate, and a guide sleeve is slidably provided on the mechanism bottom plate, the guide sleeve is connected to the moving iron core, and an operating part for manually driving the moving iron core to complete the opening of the gate is also provided on the mechanism bottom plate.

[0013] By adopting the above technical solution, when manual opening of the switch is required, the technician uses the operating member to slide the guide sleeve, and the guide sleeve is connected to the moving iron core, thereby separating the moving iron core from the static iron core, thereby realizing the opening operation of the equipment. When the circuit is powered off and manual opening of the equipment needs to be completed, it is convenient for the technician to operate.

[0014] Optionally, the operating member includes a crank arm rotatably arranged on the bottom plate of the mechanism, one end of the crank arm is rotatably and slidably connected to the guide sleeve, and a rotating cam is also provided on the bottom plate of the mechanism, and the rotating cam is movably fitted and pressed against a side of the crank arm away from the guide sleeve.

[0015] By adopting the above technical solution, when the technician needs to manually open the switch, the technician first moves the crank arm, and the crank arm rotates along the rotating connection with the bottom plate of the mechanism. Since the crank arm is connected to the guide sleeve in a rotating and sliding manner, the guide sleeve is driven to slide when the crank arm rotates, thereby realizing the sliding adjustment of the moving iron core, so that the moving iron core moves in the direction away from the pole, thereby realizing the opening of the equipment.

[0016] Optionally, the guide sleeve is an anti-magnetic sleeve.

[0017] By adopting the above technical solution, the guide sleeve is set in the form of an anti-magnetic sleeve to reduce the influence of the external connecting part on the magnetic field of the mechanism after being energized, thereby improving the adjustment accuracy of the circuit breaker and further improving the safety of the short circuit in daily use.

[0018] Optionally, a distance adjustment rod is also provided on the mechanism bottom plate, one end of the adjustment rod is fixed to the shell, and the other end of the adjustment rod passes through the mechanism bottom plate, and one end of the adjustment rod passing through the mechanism bottom plate is threadedly equipped with an adjustment nut, and multiple groups of the adjustment rods and the adjustment nuts are provided, and the multiple groups of the adjustment rods and the adjustment nuts are evenly spaced along the bottom side of the mechanism bottom plate.

[0019] By adopting the above technical solution, when the sliding position of the moving iron core is adjusted according to the usage conditions and different installation spaces, the movement process of the moving iron core can be adjusted by rotating the distance adjustment rod, thereby adjusting the accuracy of the movement of the moving iron core as the current in the coil changes; when the movement space of the moving iron core is adjusted to a smaller size, even if the current intensity passing through the coil is small, the moving contact of the pole can be adjusted.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. Through the provision of an insulating pull rod connected to the moving contact of the pole, a moving part that drives the insulating pull rod by electromagnetics, and a separating part that keeps the moving iron core and the static iron core separated, an electromagnetic structure is adopted to reduce the precision difference caused by the mechanical structure, improve the transmission precision, reduce the impact of the mechanical structure life, and improve the service life of the equipment. At the same time, the space problem caused by the mechanical structure is reduced, which is convenient for the control of the opening and closing of the micro circuit;

[0022] 2. Through the contact spring and circular spring, when the power is off, the elastic restoring force of the contact spring and the circular spring drives the moving iron core to move away from the static iron core, thereby achieving the circuit breaking of the equipment;

[0023] 3. Through the provided guide sleeve and crank arm, when manual opening of the gate is required, the technician manually rotates the crank arm to drive the guide sleeve and the moving iron core to move away from the static iron core, thereby realizing the manual opening operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the connection structure of the mechanism cover assembly.

[0026] Figure numerals: 1. Pole; 2. Flexible connection; 3. Insulating pull rod; 4. Insulating pad; 5. Mechanism base; 6. Moving iron core; 7. Protective cover; 8. Coil; 9. Opening distance adjustment rod; 10. Mechanism cover assembly; 11. Shell; 12. Contact spring; 13. Circular spring; 14. Static iron core; 15. Rotating shaft; 16. Disconnection operating rod; 10-1. Mechanism base; 10-2. Fixed plate; 10-3. Guide sleeve; 10-4. Bracket; 10-5. Crank arm. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-2 This application is described in further detail.

[0028] The present application embodiment discloses a pole-type magnetically controlled circuit breaker. Figure 1 A pole-type magnetically controlled circuit breaker includes a shell 11 fixed to one side of a moving contact of a pole 1, the shell 11 is located on one side of the pole 1 along the movement direction of the moving contact, the shell 11 is arranged in a cylindrical shape, an insulating rod 3 fixedly connected to the moving contact of the pole 1 is slidably arranged in the shell 11, the sliding direction of the insulating rod 3 is consistent with the sliding direction of the moving contact, and a soft connection 2 is clamped at the connection between the insulating rod 3 and the moving contact of the pole 1. The soft connection 2 in the present application is a soft buckle, and the clamping sleeve is arranged on the side of the insulating rod 3 close to the pole 1. One end of the insulating rod 3 close to the pole 1 passes through the shell 11, and an insulating pad 4 is arranged on the side of the shell 11 close to the pole 1. The insulating pad 4 is a rubber pad and the insulating pad 4 is horseshoe-shaped. Bosses are respectively provided at both ends to clamp with the mounting grooves opened at the bottom of the pole 1, and the shell 11, the insulating pad 4 and the pole 1 are sealed by insulating sealant.

[0029] Reference Figure 1 A movable cavity is provided on the shell 11 at the side of the insulating pull rod 3 away from the pole 1, and the end of the insulating pull rod 3 away from the pole 1 is arranged through the movable cavity, and the side of the movable cavity close to the pole 1 is a mechanism base 5. A mechanism cover assembly 10 is also provided at the end of the shell 1 away from the pole 1. A static iron core 14 is fixedly connected to the movable cavity and a moving iron core 6 is movably arranged. The static iron core 14 and the moving iron core 6 are coaxially arranged with the insulating pull rod 3. A movable part for slidingly driving the moving iron core 6 and a separation part for keeping the moving iron core 6 and the static iron core 14 separated when the power is off are also provided in the insulating cavity.

[0030] A protective cover 7 is also fixed to the outer peripheral wall of the shell 11. The protective cover 7 is a thin-walled cylindrical insulating tube, and both ends of the passport are provided with uniformly distributed steps. One end is placed in the uniformly distributed steps in the mechanism base 5, and the other end is fixed to the end of the shell 11 away from the pole 1.

[0031] The moving iron core 6 and the static iron core 14 are both provided with a receiving groove on the side close to each other, and the corresponding receiving grooves on the moving iron core 6 and the static iron core 14 are correspondingly cut to form an annular cavity, and the movable part includes a coil 8 arranged in the annular cavity, and the coil 8 is passed with positive / reverse current. The moving iron core 6 and the static iron core 14 in the present application are both made of paramagnetic materials. The moving iron core 6 and the static iron core 14 are both cylindrical structures, and a through hole is provided in the middle for the long end of the insulating pull rod 3 to penetrate the bottom of the iron core to reduce the wall thickness difference and increase the magnetic line density. At this time, the end of the insulating pull rod 3 passing through the static iron core 14 is in a step shape, and the end side diameter of the insulating pull rod 3 passing through the static iron core 14 is smaller than the diameter of the end close to the pole 1, and the other end of the insulating pull rod 3 passes through the moving iron core Core 6 is fixedly connected to the moving iron core 6; thus, when it is necessary to perform a closing operation, the technician passes a positive current into the coil 8. Since the moving iron core 6 and the static iron core 14 are both paramagnetic cores, when the positive current is passed, the moving iron core 6 and the static iron core 14 generate electromagnetic force and attract each other, and the moving iron core 6 moves toward the static iron core 14, thereby driving the insulating pull rod 3 to move toward the pole 1, thereby achieving the fitting of the moving contact and the static contact in the pole 1, and achieving the closing of the equipment; when the reverse current is passed, the moving iron core 6 and the static iron core 14 generate a repulsive force, thereby causing the moving iron core 6 to move in the direction away from the static iron core 14, driving the insulating pull rod 3 to move in the direction away from the pole 1, thereby achieving the opening of the device.

[0032] In order to ensure that the moving iron core 6 is always located away from the static iron core 14 when the power is off, a first screw is provided at one end of the insulating pull rod 3, and a second screw is provided at the other end of the insulating pull rod 3. The first screw is connected to the pole 1. The middle diameter of the insulating pull rod 3 is larger than the diameters of the first screw and the second screw. The separating member includes a contact spring 12 sleeved on the outer peripheral side of the second screw. One end of the contact spring 12 is tightly pressed against the wider diameter side of the insulating pull rod 3, and the other end of the contact spring 12 is tightly pressed against the inner bottom wall of the moving iron core 6. The moving iron core 6 is pressed against the electromagnetic force. When moving downward in the direction close to the static iron core 14, the contact spring 12 presses against the insulating pull rod 3 to make the insulating pull rod 3 move toward the direction of the pole 1, thereby realizing the opening and closing of the pole 1. At this time, in order to further improve the separation of the moving iron core 6 and the static iron core 14 when the power is off, the separation piece also includes a circular spring 13 arranged on the outside of the contact spring 12, the circular spring 13, one end of the circular spring 13 is pressed against the inner bottom wall of the moving iron core 6, and the other end of the circular spring 13 is fixedly pressed against the inner bottom wall of the static iron core 14, and the initial state of the circular spring 13 is a compressed state.

[0033] When power is not supplied, since the initial state of the circular spring 13 is a compressed state, the movable iron core 6 and the stationary iron core 14 are always kept separated under the action of the elastic restoring force of the circular spring 13, and the opening state when power is not supplied is realized under the action of the elastic restoring force of the contact spring 12, thereby ensuring the normal operation of the circuit breaker. When a positive current is supplied, the attraction between the movable iron core 6 and the stationary iron core 14 is greater than the elastic restoring force of the circular spring 13, thereby causing the movable iron core 6 to move toward the stationary iron core 14, thereby causing the insulating pull rod 3 to move toward the pole 1 under the action of the contact spring 12, thereby realizing the connection between the movable contact of the pole 1 and the stationary iron core 14. The static contacts are fitted together to achieve closing; when opening is required, the technician passes a reverse current into the coil 8. At this time, under the action of the elastic restoring force of the contact spring 12, the elastic restoring force of the circular spring 13 and the repulsive force between the moving and static iron cores 14, the insulating pull rod 3 moves away from the pole 1, thereby achieving the opening operation; because when the coil 8 is energized, the electromagnetic force (attractive force or repulsive force) generated is an instantaneous force, the contact spring 12 and the circular spring 13 are provided to reduce the mechanical damage caused by the separation and fitting of the moving iron core 6 and the static iron core 14, and generate a buffer when the moving iron core 6 and the static iron core 14 move towards each other.

[0034] A mechanism cover assembly 10 is also provided on the side of the shell 11 away from the pole 1. The mechanism cover assembly 10 includes a mechanism base plate 10-1 provided on the shell 11. The mechanism base plate 10-1 is also provided with a fixing member for keeping the shell 11 and the mechanism base plate 10-1 stably connected. The fixing member includes a fixing bolt provided on the side of the mechanism base plate 10-1. A plurality of fixing holes are opened on the mechanism base plate 10-1. A plurality of fixing bolts are threadedly assembled in the fixing holes and threadedly assembled in the shell 11.

[0035] A through hole is also provided at the center of the mechanism bottom plate 10-1, in which a guide sleeve 10-3 and a fixed plate 10-2 are slidably arranged. The fixed plate 10-2 and the guide sleeve 10-3 are coaxially arranged, and the sliding direction of the fixed plate 10-2 and the guide sleeve 10-3 is consistent with the movement direction of the moving iron core 6. The guide sleeve 10-3 is an anti-magnetic sleeve made of nylon, one end of which is cylindrical and embedded in the circular hole of the moving iron core 6, and a large boss is screwed through the guide sleeve 10-3 and the fixed plate 10-2 in sequence and fixed to the moving iron core 6, so that the insulating pull rod 3 moves in a straight line, and the mechanism bottom plate 10-1 is also provided with a screw for the guide sleeve 10-3. An operating member for opening the gate by sliding adjustment has a bracket 10-4 fixedly connected to the bottom plate 10-1 of the mechanism, and the operating member includes a crank arm 10-5 rotatably connected to the bracket 10-4, one end of the crank arm 10-5 is rotatably and slidably connected to the fixed plate 10-2, that is, at this time, a waist-shaped hole is provided at the rotating shaft 15 where the crank arm 10-5 is connected to the fixed plate 10-2, that is, at this time, when manual opening of the gate is required, the technician rotates the crank arm 10-5, and the crank arm 10-5 gives way to the waist-shaped hole, driving the fixed plate 10-2 to move away from the pole 1, thereby driving the moving iron core 6 connected to the fixed plate 10-2 to move, thereby realizing manual opening of the gate.

[0036] Since it is often necessary to manually open the three-phase circuit in some high-voltage cabinets, that is, there are three groups of such circuit breakers, when it is necessary to manually open the three-phase circuit, simultaneous opening is often adopted to improve efficiency and reduce arc generation. Therefore, an opening operating rod 16 is rotatably connected to the mechanism bottom plate 10-1, and the length direction of the opening operating rod 16 is consistent with the extension direction of the three groups of circuit breakers. The opening operating rod 16 is rotatably connected to each corresponding mechanism base 5. The cam and the crank arm 10-5 are away from the fixed plate 10-2. One end of the connection is movably fitted and pressed tightly, that is, when manual operation is required to open the three-phase circuit, the technician rotates the opening operating lever 16, which drives the cam to rotate, and the cam presses the crank arm 10-5. At this time, the end of the crank arm 10-5 close to the cam rotates toward the mechanism base plate 10-1, and the end of the crank arm 10-5 away from the cam rotates in the direction away from the mechanism base plate 10-1, thereby driving the fixed plate 10-2 and the guide sleeve 10-3 to move in the direction away from the pole 1, thereby realizing the circuit breaking and opening operation of the moving and static contacts in the pole 1.

[0037] At the same time, since the distance moved by the moving iron core 6 is inconsistent according to the different current sizes in the coil 8, in order to realize the sliding adjustment of the moving iron core 6 under different circuits and currents, the mechanism base plate 10-1 is also rotatably connected with an opening adjustment rod 9, one end of the opening adjustment rod 9 is fixed to the shell 11, and the other end of the opening adjustment rod 9 passes through the mechanism base plate 10-1. The opening adjustment rod 9 passes through one end of the mechanism base plate 10-1 and is threadedly equipped with an adjusting nut. There are multiple sets of opening adjustment rods 9 and adjusting nuts, and the multiple sets of opening adjustment rods 9 and adjusting nuts are evenly spaced along the bottom side of the mechanism base plate 10-1.

[0038] The implementation principle of a pole-type magnetically controlled circuit breaker in an embodiment of the present application is as follows: when a closing operation is required, the technician passes a positive current into the coil 8. Since the moving iron core 6 and the static iron core 14 are both paramagnetic cores, when a positive current is passed, the moving iron core 6 and the static iron core 14 generate an electromagnetic force and attract each other, and the moving iron core 6 moves toward the static iron core 14, thereby driving the insulating pull rod 3 to move toward the pole 1, thereby achieving the fitting of the moving contact and the static contact in the pole 1, and achieving the closing of the device; when a reverse current is passed, the moving iron core 6 and the static iron core 14 generate a repulsive force, thereby causing the moving iron core 6 to move in a direction away from the static iron core 14, driving the insulating pull rod 3 to move in a direction away from the pole 1, thereby achieving the opening of the device;

[0039] When manual opening operation is required, the technician first moves the crank arm 10-5, and the crank arm 10-5 rotates along the rotating connection with the mechanism base plate 10-1. Since the crank arm 10-5 is connected to the guide sleeve 10-3 by rotation and sliding, the guide sleeve 10-3 is driven to slide when the crank arm 10-5 rotates, thereby realizing the sliding adjustment of the moving iron core 6, so that the moving iron core 6 moves in the direction away from the pole 1, and the equipment is opened.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pole-type magnetically controlled circuit breaker, characterized in that: The invention comprises a shell (11) connected to a pole (1), a mechanism bottom plate (10-1) arranged at one end of the shell (11) away from the pole (1), a moving iron core (6) arranged in the shell (11), and a stationary iron core (14) arranged in the shell (11); an insulating pull rod (3) connected to the moving contact of the pole (1) is also arranged in the shell (11); the stationary iron core (14) and the moving iron core (6) are coaxially arranged, and the moving iron core (6) moves close to the stationary iron core (14); the end of the insulating pull rod (3) away from the pole (1) passes through the stationary iron core (14) and is connected to the moving iron core (6); a moving part for driving the moving iron core (6) to move toward the stationary iron core (14) is arranged in the shell (11), and a separation part for keeping the moving iron core (6) and the stationary iron core (14) separated when the power is off is provided on the insulating pull rod (3).

2. A pole-type magnetically controlled circuit breaker according to claim 1, characterized in that: The moving iron core (6) and the stationary iron core (14) are provided with a receiving groove on one side close to each other, the moving part comprises a coil (8) arranged in the receiving groove, a positive / reverse current flows through the coil (8), and the stationary iron core (14) and the moving iron core (6) are both paramagnetic cores.

3. A pole-type magnetically controlled circuit breaker according to claim 2, characterized in that: A first screw is provided at one end of the insulating rod (3), and a second screw is provided at the other end of the insulating rod (3); the first screw is connected to the pole (1); the diameter of the middle portion of the insulating rod (3) is larger than the diameters of the first screw and the second screw; the separating member comprises a contact spring (12) sleeved on the second screw; one end of the contact spring (12) is tightly abutted against the end side of the insulating rod (3) with a larger diameter; the other end of the contact spring (12) is tightly abutted against the inner bottom wall of the accommodating groove of the moving iron core (6); and the initial state of the contact spring (12) is a compressed state.

4. A pole-type magnetically controlled circuit breaker according to claim 3, characterized in that: The separation member also includes a circular spring (13) arranged on the outer periphery of the contact spring (12), one end of the circular spring (13) is tightly pressed against the inner bottom wall of the receiving groove of the static iron core (14), and the other end of the circular spring (13) is tightly pressed against the inner bottom wall of the receiving groove of the moving iron core (6).

5. A pole-type magnetically controlled circuit breaker according to claim 4, characterized in that: The mechanism bottom plate (10-1) is provided with a fixing member for maintaining a stable connection between the housing (11) and the mechanism bottom plate (10-1), and a guide sleeve (10-3) is slidably provided on the mechanism bottom plate (10-1), the guide sleeve (10-3) being connected to the moving iron core (6), and an operating member for manually driving the moving iron core (6) to complete the opening of the switch is also provided on the mechanism bottom plate (10-1).

6. A pole-type magnetically controlled circuit breaker according to claim 5, characterized in that: The operating member comprises a crank arm (10-5) rotatably arranged on the mechanism bottom plate (10-1), one end of the crank arm (10-5) being rotatably and slidably connected to the guide sleeve (10-3), and a rotating cam is also provided on the mechanism bottom plate (10-1), the rotating cam being movably fitted and tightly pressed against a side of the crank arm (10-5) away from the guide sleeve (10-3).

7. A pole-type magnetically controlled circuit breaker according to claim 6, characterized in that: The guide sleeve (10-3) is an anti-magnetic sleeve.

8. A pole-type magnetically controlled circuit breaker according to claim 7, characterized in that: The mechanism bottom plate (10-1) is also provided with a distance adjustment rod (9), one end of the distance adjustment rod (9) is fixed to the housing (11), the other end of the distance adjustment rod (9) passes through the mechanism bottom plate (10-1), one end of the distance adjustment rod (9) passing through the mechanism bottom plate (10-1) is threadedly mounted with an adjustment nut, and multiple groups of the distance adjustment rods (9) and the adjustment nuts are provided, and the multiple groups of the distance adjustment rods (9) and the adjustment nuts are evenly spaced and arranged along the bottom side of the mechanism bottom plate (10-1).

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