CN220306193U - Electromagnet for driving circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of electromagnets and relates to an electromagnet for driving a circuit breaker, which includes an outer frame. An intermediate partition is provided in the middle of the outer frame. The intermediate partition divides the internal space of the outer frame into an upper coil chamber and a lower coil chamber. , the outer frame is also equipped with a guide sleeve, which runs through the middle partition. The guide sleeve in the upper coil chamber is equipped with coil one on its outer circumference. The guide sleeve in the lower coil chamber is equipped with coil two on its outer circumference. There is a moving iron core in the guide sleeve. The two ends of the guide sleeve are respectively provided with a static iron core one and a static iron core two. The moving iron core has a clearance fit with the inner wall of the guide sleeve, and a push-pull rod is connected to the end of the moving iron core. The utility model has a simple structure and low manufacturing cost. It can realize the movement of the iron core in two directions and can conveniently drive the circuit breaker on and off. After the coil is powered off, the moving iron core is in a free state and does not affect the opening and closing of the circuit breaker. manual operation.

Description

Electromagnet for driving circuit breaker

Technical Field

The utility model relates to an electromagnet for driving a circuit breaker, and belongs to the technical field of electromagnets.

Background

The electromagnet is widely applied in daily life, is a device for generating electromagnetism by electrifying and is used for controlling the on-off of a circuit breaker, and generally mainly comprises a coil, a guide sleeve and an iron core, and the on-off of the coil is controlled to realize the back-and-forth action of the iron core, so that the on-off of the circuit breaker is finally controlled; the existing electromagnets for the circuit breaker are mostly permanent magnet electromagnets, and a manual switching-on/off function cannot be realized after power failure.

Disclosure of Invention

The utility model aims to solve the technical problems that: the electromagnet for driving the circuit breaker not only can realize the movement of the movable iron core in two directions so as to drive the on-off of the circuit breaker, but also can be in a free state after the coil is powered off, and the manual operation of opening and closing the circuit breaker is not influenced.

The utility model discloses an electromagnet for driving a circuit breaker, which comprises an outer frame, wherein an intermediate baffle is arranged in the middle of the outer frame, the inner space of the outer frame is divided into an upper coil chamber and a lower coil chamber by the intermediate baffle, a guide sleeve is further arranged in the outer frame, the guide sleeve penetrates through the intermediate baffle, a first coil is arranged on the periphery of the guide sleeve in the upper coil chamber, a second coil is arranged on the periphery of the guide sleeve in the lower coil chamber, a movable iron core is arranged in the guide sleeve, a first static iron core and a second static iron core are respectively arranged at two ends of the guide sleeve, the movable iron core is in clearance fit with the inner wall of the guide sleeve, and the end part of the movable iron core is connected with a push-pull rod.

The first static iron core and the second static iron core are respectively close to the first coil and the second coil. When the power is not on, the movable iron core is in a free state; when the first coil is electrified and the second coil is powered off, the movable iron core moves in the guide sleeve in the first direction of the static iron core, and is in a free state when the first coil is powered off and the movable iron core is in attraction with the first static iron core at the moment of electrifying; when the second coil is electrified and the first coil is in power failure, the movable iron core moves in the guide sleeve towards the second static iron core, and the second coil is in a free state after the second coil is electrified and the second static iron core is in attraction. The on-off condition of the first coil and the second coil is controlled, and the movement of the movable iron core in two directions is controlled, so that the on-off of the circuit breaker is driven, and the structure is simple and reliable.

Preferably, the outer frame comprises a U-shaped frame, a capping plate is arranged at the opening end of the U-shaped frame, and the first static iron core and the second static iron core are respectively fixed with the capping plate and the U-shaped frame bottom; the push-pull rod penetrates through the top sealing flat plate or the U-shaped frame bottom plate. The U-shaped frame is formed by bending an iron plate, the structure and the forming process are simple, the manufacturing cost is low, and the U-shaped frame is square in shape and is convenient to place and fix in the circuit breaker. The capping flat plate is fixed at the opening end of the U-shaped frame in a welding mode and the like, and the fixing mode is simpler.

Preferably, two ends of the movable iron core are respectively in a frustum shape, and one ends of the first static iron core and the second static iron core, which are matched with the movable iron core, are respectively provided with a frustum-shaped groove. The movable iron core is respectively inserted into the frustum-shaped groove of the first static iron core or the second static iron core in the process of the back and forth movement of the movable iron core, and the movable iron core is more reliably matched with the first static iron core and the second static iron core.

Preferably, the bottoms of the frustum-shaped grooves of the first and second static iron cores are respectively provided with a first magnetic isolation plate and a second magnetic isolation plate. The arrangement of the first magnetic isolation plate and the second magnetic isolation plate reduces or eliminates the magnetic influence of the external magnetic circuit on the movable iron core.

Preferably, two sides of one side wall of the U-shaped frame are additionally provided with fixing lugs, and fixing holes are formed in the fixing lugs. The fixing lugs are convenient for fixing the U-shaped frame and other parts of the circuit breaker.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model has simple structure, reasonable design and low manufacturing cost, can realize the movement of the movable iron core in two directions so as to drive the on-off of the circuit breaker, and when the first coil and the second coil are in the power-off state, the movable iron core is in a free state, and the manual operation of opening and closing the circuit breaker is not influenced.

Drawings

Fig. 1 is a schematic diagram of a circuit breaker driving electromagnet;

fig. 2 is a left side view of the circuit breaker driving electromagnet;

fig. 3 is a schematic view of the structure of the outer frame.

In the figure: 1. an outer frame; 2. a first coil; 3. a capping plate; 4. a push-pull rod; 5. a static iron core I; 6. a movable iron core; 7. a middle partition plate; 8. a second coil; 9. a frustum-shaped groove; 10. a second magnetism isolating plate; 11. a static iron core II; 12. a first magnetism isolating plate; 13. a fixing hole; 14. a fixed ear; 15. a U-shaped frame; 16. and (5) guiding the sleeve.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1-3, the electromagnet for driving a circuit breaker according to the utility model comprises an outer frame 1, wherein a middle partition 7 is arranged in the middle part of the outer frame 1, the middle partition 7 divides the inner space of the outer frame into an upper coil chamber and a lower coil chamber, a guide sleeve 16 is further arranged in the outer frame 1, the guide sleeve 16 penetrates through the middle partition 7, a first coil 2 is arranged on the periphery of the guide sleeve 16 in the upper coil chamber, a second coil 8 is arranged on the periphery of the guide sleeve 16 in the lower coil chamber, a movable iron core 6 is arranged in the guide sleeve 16, a first static iron core 5 and a second static iron core 11 are respectively arranged at two ends in the guide sleeve 16, the movable iron core 6 is in clearance fit with the inner wall of the guide sleeve 16, and the end part of the movable iron core 6 is connected with a push-pull rod 4.

In this embodiment:

the outer frame 1 comprises a U-shaped frame 15, a capping plate 3 is arranged at the opening end of the U-shaped frame 15, and a first static iron core 5 and a second static iron core 11 are respectively fixed with the capping plate 3 and the bottom of the U-shaped frame 15; the push-pull rod 4 penetrates through the top sealing flat plate 3 or the bottom plate of the U-shaped frame 15. The U-shaped frame 15 is formed by bending an iron plate, and has simple structure and forming process and low manufacturing cost. The capping plate 3 is fixed at the open end of the U-shaped frame 15 by welding, etc., and the fixing mode is also simpler.

The two ends of the movable iron core 6 are respectively in a frustum shape, and the ends of the first static iron core 5 and the second static iron core 11 matched with the movable iron core 6 are respectively provided with a frustum-shaped groove 9. The movable iron core 6 is respectively inserted into the frustum-shaped groove 9 of the first static iron core 5 or the second static iron core 11 in the process of moving back and forth, and the movable iron core 6 is more reliably matched with the first static iron core 5 and the second static iron core 11. The bottoms of the frustum-shaped grooves 9 of the first static iron core 5 and the second static iron core 11 are respectively provided with a first magnetic isolation plate 12 and a second magnetic isolation plate 10; the arrangement of the first magnetic isolation plate 12 and the second magnetic isolation plate 10 reduces or eliminates the magnetic influence of the external magnetic circuit on the movable iron core 6. Fixing lugs 14 are additionally arranged on two sides of one side wall of the U-shaped frame 15, and fixing holes 13 are formed in the fixing lugs 14; the fixing lugs 14 are arranged to facilitate the fixing of the U-shaped frame 15 and other parts of the circuit breaker.

The first static iron core 5 and the second static iron core 11 are respectively close to the first coil 2 and the second coil 8. When the first coil 2 and the second coil 8 are not electrified, the movable iron core 6 is in a free state; when the first coil 2 is electrified and the second coil 8 is powered off, the movable iron core 6 moves in the guide sleeve 16 towards the first static iron core 5, and is attracted with the first static iron core at the moment of electrifying, after the first coil 2 is powered off, the attraction force disappears, and the movable iron core 6 is in a free state; when the second coil 8 is electrified and the first coil 2 is in power failure, the movable iron core 6 moves in the guide sleeve 16 towards the second static iron core 11, and is in a free state with the second static iron core at the moment of electrifying, the attraction force disappears after the second coil 8 is in power failure. The on-off condition of the first coil 2 and the second coil 8 is controlled, the moving iron core 6 is controlled to move towards two directions, the on-off of the circuit breaker is conveniently driven, and the structure is simple and reliable.

Working principle:

the outer frame 1 corresponds to an outer magnetic circuit, the middle iron plate and the outer magnetic circuit form 2 closed-loop magnetic circuits, the first coil 2 and the second coil 8 are excitation coils, and two magnetic fields with opposite directions are respectively generated through input voltages; when the first coil 2 is electrified and the second coil 8 is not electrified, the first coil 2 forms a closed loop magnetic circuit through the first static iron core 5, the movable iron core 6, the middle iron plate and the outer frame 1, the first static iron core 5 generates magnetic attraction to the movable iron core 6, so that the movable iron core moves towards the first static iron core 5, and the first magnetic isolation plate 12 reduces or eliminates the magnetic influence of the outer magnetic circuit on the movable iron core 6; similarly, when the second coil 8 is electrified and the first coil 2 is not electrified, the second coil 8 forms a closed loop magnetic circuit through the second static iron core 11, the movable iron core 6, the middle iron plate and the outer frame 1, the second static iron core 11 generates magnetic attraction to the movable iron core 6, the movable iron core 6 moves towards the second static iron core 11, and the second magnetic isolation plate 10 reduces or eliminates the magnetic influence of the outer magnetic circuit on the movable iron core 6.

Claims (5)

1. An electromagnet for driving a circuit breaker, characterized in that: including outer frame (1), middle part is equipped with intermediate baffle (7) in outer frame (1), intermediate baffle (7) divide into outer frame inner space and go up coil room and lower coil room, still be equipped with guide pin bushing (16) in outer frame (1), guide pin bushing (16) run through intermediate baffle (7), guide pin bushing (16) periphery in the upper coil room is equipped with coil one (2), guide pin bushing (16) periphery in the lower coil room is equipped with coil two (8), be equipped with in guide pin bushing (16) and move iron core (6), both ends are equipped with quiet iron core one (5) and quiet iron core two (11) respectively in guide pin bushing (16), move iron core (6) and guide pin bushing (16) inner wall clearance fit, and move iron core (6) end connection has push-pull rod (4).

2. The electromagnet for driving a circuit breaker according to claim 1, wherein: the outer frame (1) comprises a U-shaped frame (15), a top sealing flat plate (3) is arranged at the opening end of the U-shaped frame (15), and a first static iron core (5) and a second static iron core (11) are respectively fixed with the top sealing flat plate (3) and the bottom of the U-shaped frame (15); the push-pull rod (4) penetrates through the bottom plate of the capping flat plate (3) or the U-shaped frame (15).

3. The electromagnet for driving a circuit breaker according to claim 1, wherein: both ends of the movable iron core (6) are respectively in a frustum shape, and one ends of the first static iron core (5) and the second static iron core (11) matched with the movable iron core (6) are respectively provided with a frustum-shaped groove (9).

4. The electromagnet for driving a circuit breaker according to claim 3, wherein: the bottoms of the frustum-shaped grooves of the first static iron core (5) and the second static iron core (11) are respectively provided with a first magnetic isolation plate (12) and a second magnetic isolation plate (10).

5. The electromagnet for driving a circuit breaker according to claim 2, wherein: fixing lugs (14) are additionally arranged on two sides of one side wall of the U-shaped frame (15), and fixing holes (13) are formed in the fixing lugs (14).